mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-29 06:13:20 +00:00
e7f0b5801d
This allows users to add custom keybindings to autocomplete only one character at a time. Resolves https://github.com/fish-shell/fish-shell/issues/4984
3959 lines
153 KiB
C++
3959 lines
153 KiB
C++
// Functions for reading data from stdin and passing to the parser. If stdin is a keyboard, it
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// supplies a killring, history, syntax highlighting, tab-completion and various other interactive
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// features.
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//
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// Internally the interactive mode functions rely in the functions of the input library to read
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// individual characters of input.
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//
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// Token search is handled incrementally. Actual searches are only done on when searching backwards,
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// since the previous results are saved. The last search position is remembered and a new search
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// continues from the last search position. All search results are saved in the list 'search_prev'.
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// When the user searches forward, i.e. presses Alt-down, the list is consulted for previous search
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// result, and subsequent backwards searches are also handled by consulting the list up until the
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// end of the list is reached, at which point regular searching will commence.
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#include "config.h"
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// IWYU pragma: no_include <type_traits>
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#include <errno.h>
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#include <fcntl.h>
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#include <pthread.h>
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#ifdef HAVE_SIGINFO_H
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#include <siginfo.h>
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#endif
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <cstring>
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include <sys/time.h>
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#include <sys/types.h>
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#include <termios.h>
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#include <time.h>
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#include <unistd.h>
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#include <wctype.h>
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#include <algorithm>
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#include <atomic>
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#include <csignal>
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#include <cwchar>
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#include <functional>
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#include <memory>
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#include <set>
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#include <stack>
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#include "ast.h"
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#include "color.h"
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#include "common.h"
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#include "complete.h"
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#include "env.h"
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#include "event.h"
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#include "exec.h"
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#include "expand.h"
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#include "fallback.h" // IWYU pragma: keep
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#include "flog.h"
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#include "function.h"
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#include "global_safety.h"
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#include "highlight.h"
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#include "history.h"
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#include "input.h"
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#include "input_common.h"
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#include "intern.h"
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#include "io.h"
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#include "iothread.h"
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#include "kill.h"
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#include "output.h"
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#include "pager.h"
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#include "parse_constants.h"
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#include "parse_util.h"
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#include "parser.h"
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#include "proc.h"
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#include "reader.h"
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#include "sanity.h"
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#include "screen.h"
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#include "signal.h"
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#include "termsize.h"
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#include "tokenizer.h"
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#include "wutil.h" // IWYU pragma: keep
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// Name of the variable that tells how long it took, in milliseconds, for the previous
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// interactive command to complete.
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#define ENV_CMD_DURATION L"CMD_DURATION"
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/// Maximum length of prefix string when printing completion list. Longer prefixes will be
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/// ellipsized.
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#define PREFIX_MAX_LEN 9
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/// A simple prompt for reading shell commands that does not rely on fish specific commands, meaning
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/// it will work even if fish is not installed. This is used by read_i.
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#define DEFAULT_PROMPT L"echo -n \"$USER@$hostname $PWD \"'> '"
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/// The name of the function that prints the fish prompt.
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#define LEFT_PROMPT_FUNCTION_NAME L"fish_prompt"
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/// The name of the function that prints the fish right prompt (RPROMPT).
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#define RIGHT_PROMPT_FUNCTION_NAME L"fish_right_prompt"
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/// The name of the function to use in place of the left prompt if we're in the debugger context.
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#define DEBUG_PROMPT_FUNCTION_NAME L"fish_breakpoint_prompt"
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/// The name of the function for getting the input mode indicator.
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#define MODE_PROMPT_FUNCTION_NAME L"fish_mode_prompt"
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/// The default title for the reader. This is used by reader_readline.
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#define DEFAULT_TITLE L"echo (status current-command) \" \" $PWD"
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/// The maximum number of characters to read from the keyboard without repainting. Note that this
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/// readahead will only occur if new characters are available for reading, fish will never block for
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/// more input without repainting.
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static constexpr size_t READAHEAD_MAX = 256;
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/// A mode for calling the reader_kill function. In this mode, the new string is appended to the
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/// current contents of the kill buffer.
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#define KILL_APPEND 0
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/// A mode for calling the reader_kill function. In this mode, the new string is prepended to the
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/// current contents of the kill buffer.
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#define KILL_PREPEND 1
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enum class history_search_direction_t { forward, backward };
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enum class jump_direction_t { forward, backward };
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enum class jump_precision_t { till, to };
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/// Any time the contents of a buffer changes, we update the generation count. This allows for our
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/// background threads to notice it and skip doing work that they would otherwise have to do.
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static std::atomic<unsigned> s_generation;
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/// Helper to get the generation count
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static inline unsigned read_generation_count() {
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return s_generation.load(std::memory_order_relaxed);
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}
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/// \return an operation context for a background operation..
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/// Crucially the operation context itself does not contain a parser.
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/// It is the caller's responsibility to ensure the environment lives as long as the result.
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operation_context_t get_bg_context(const std::shared_ptr<environment_t> &env,
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unsigned int generation_count) {
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cancel_checker_t cancel_checker = [generation_count] {
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// Cancel if the generation count changed.
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return generation_count != read_generation_count();
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};
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return operation_context_t{nullptr, *env, std::move(cancel_checker)};
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}
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/// Get the debouncer for autosuggestions and background highlighting.
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/// These are deliberately leaked to avoid shutdown dtor registration.
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static debounce_t &debounce_autosuggestions() {
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const long kAutosuggetTimeoutMs = 500;
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static auto res = new debounce_t(kAutosuggetTimeoutMs);
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return *res;
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}
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static debounce_t &debounce_highlighting() {
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const long kHighlightTimeoutMs = 500;
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static auto res = new debounce_t(kHighlightTimeoutMs);
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return *res;
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}
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bool edit_t::operator==(const edit_t &other) const {
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return cursor_position_before_edit == other.cursor_position_before_edit &&
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offset == other.offset && length == other.length && old == other.old &&
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replacement == other.replacement;
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}
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void undo_history_t::clear() {
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edits.clear();
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edits_applied = 0;
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may_coalesce = false;
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}
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void apply_edit(wcstring *target, const edit_t &edit) {
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target->replace(edit.offset, edit.length, edit.replacement);
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}
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/// Returns the number of characters left of the cursor that are removed by the
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/// deletion in the given edit.
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static size_t chars_deleted_left_of_cursor(const edit_t &edit) {
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if (edit.cursor_position_before_edit > edit.offset) {
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return std::min(edit.length, edit.cursor_position_before_edit - edit.offset);
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}
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return 0;
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}
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/// Compute the position of the cursor after the given edit.
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static size_t cursor_position_after_edit(const edit_t &edit) {
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size_t cursor = edit.cursor_position_before_edit + edit.replacement.size();
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size_t removed = chars_deleted_left_of_cursor(edit);
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return cursor > removed ? cursor - removed : 0;
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}
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/// Whether we want to append this string to the previous edit.
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static bool want_to_coalesce_insertion_of(const editable_line_t &el, const wcstring &str) {
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// The previous edit must support coalescing.
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if (!el.undo_history.may_coalesce) return false;
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// Only consolidate single character inserts.
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if (str.size() != 1) return false;
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// Make an undo group after every space.
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if (str.at(0) == L' ') return false;
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assert(!el.undo_history.edits.empty());
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const edit_t &last_edit = el.undo_history.edits.back();
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// Don't add to the last edit if it deleted something.
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if (last_edit.length != 0) return false;
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// Must not have moved the cursor!
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if (cursor_position_after_edit(last_edit) != el.position()) return false;
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return true;
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}
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void editable_line_t::insert_string(const wcstring &str, size_t start, size_t len) {
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// Clamp the range to something valid.
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size_t string_length = str.size();
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start = std::min(start, string_length); //!OCLINT(parameter reassignment)
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len = std::min(len, string_length - start); //!OCLINT(parameter reassignment)
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if (want_to_coalesce_insertion_of(*this, str)) {
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edit_t &edit = undo_history.edits.back();
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edit.replacement.append(str);
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apply_edit(&text_, edit_t(position(), 0, str));
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set_position(position() + len);
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} else {
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push_edit(edit_t(position(), 0, str.substr(start, len)));
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}
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undo_history.may_coalesce = (str.size() == 1);
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}
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void editable_line_t::erase_substring(size_t offset, size_t length) {
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push_edit(edit_t(offset, length, L""));
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undo_history.may_coalesce = false;
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}
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void editable_line_t::replace_substring(size_t offset, size_t length, wcstring &&replacement) {
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push_edit(edit_t(offset, length, replacement));
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undo_history.may_coalesce = false;
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}
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bool editable_line_t::undo() {
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if (undo_history.edits_applied == 0) return false; // nothing to undo
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const edit_t &edit = undo_history.edits.at(undo_history.edits_applied - 1);
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undo_history.edits_applied--;
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edit_t inverse = edit_t(edit.offset, edit.replacement.size(), L"");
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inverse.replacement = edit.old;
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size_t old_position = edit.cursor_position_before_edit;
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apply_edit(&text_, inverse);
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set_position(old_position);
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undo_history.may_coalesce = false;
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return true;
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}
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void editable_line_t::push_edit(edit_t &&edit) {
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bool edit_does_nothing = edit.length == 0 && edit.replacement.empty();
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if (edit_does_nothing) return;
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if (undo_history.edits_applied != undo_history.edits.size()) {
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// After undoing some edits, the user is making a new edit;
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// we are about to create a new edit branch.
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// Discard all edits that were undone because we only support
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// linear undo/redo, they will be unreachable.
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undo_history.edits.erase(undo_history.edits.begin() + undo_history.edits_applied,
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undo_history.edits.end());
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}
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edit.cursor_position_before_edit = position();
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edit.old = text_.substr(edit.offset, edit.length);
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apply_edit(&text_, edit);
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set_position(cursor_position_after_edit(edit));
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assert(undo_history.edits_applied == undo_history.edits.size());
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undo_history.edits_applied++;
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undo_history.edits.emplace_back(edit);
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}
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bool editable_line_t::redo() {
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if (undo_history.edits_applied >= undo_history.edits.size()) return false; // nothing to redo
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const edit_t &edit = undo_history.edits.at(undo_history.edits_applied);
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undo_history.edits_applied++;
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apply_edit(&text_, edit);
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set_position(cursor_position_after_edit(edit));
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undo_history.may_coalesce = false; // Make a new undo group here.
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return true;
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}
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namespace {
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/// Test if the given string contains error. Since this is the error detection for general purpose,
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/// there are no invalid strings, so this function always returns false.
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parser_test_error_bits_t default_test(parser_t &parser, const wcstring &b) {
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UNUSED(parser);
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UNUSED(b);
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return 0;
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}
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/// Encapsulation of the reader's history search functionality.
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class reader_history_search_t {
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public:
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enum mode_t {
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inactive, // no search
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line, // searching by line
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prefix, // searching by prefix
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token // searching by token
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};
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private:
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/// The type of search performed.
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mode_t mode_{inactive};
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/// Our history search itself.
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history_search_t search_;
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/// The ordered list of matches. This may grow long.
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std::vector<wcstring> matches_;
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/// A set of new items to skip, corresponding to matches_ and anything added in skip().
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std::set<wcstring> skips_;
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/// Index into our matches list.
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size_t match_index_{0};
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/// Adds the given match if we haven't seen it before.
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void add_if_new(wcstring text) {
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if (add_skip(text)) {
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matches_.push_back(std::move(text));
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}
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}
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/// Attempt to append matches from the current history item.
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/// \return true if something was appended.
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bool append_matches_from_search() {
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const size_t before = matches_.size();
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wcstring text = search_.current_string();
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if (mode_ == line || mode_ == prefix) {
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add_if_new(std::move(text));
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} else if (mode_ == token) {
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const wcstring &needle = search_string();
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tokenizer_t tok(text.c_str(), TOK_ACCEPT_UNFINISHED);
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wcstring_list_t local_tokens;
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while (auto token = tok.next()) {
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if (token->type != token_type_t::string) continue;
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wcstring text = tok.text_of(*token);
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if (text.find(needle) != wcstring::npos) {
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local_tokens.emplace_back(std::move(text));
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}
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}
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// Make sure tokens are added in reverse order. See #5150
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for (auto i = local_tokens.rbegin(); i != local_tokens.rend(); ++i) {
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add_if_new(std::move(*i));
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}
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}
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return matches_.size() > before;
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}
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bool move_forwards() {
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// Try to move within our previously discovered matches.
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if (match_index_ > 0) {
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match_index_--;
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return true;
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}
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return false;
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}
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bool move_backwards() {
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// Try to move backwards within our previously discovered matches.
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if (match_index_ + 1 < matches_.size()) {
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match_index_++;
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return true;
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}
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// Add more items from our search.
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while (search_.go_backwards()) {
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if (append_matches_from_search()) {
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match_index_++;
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assert(match_index_ < matches_.size() && "Should have found more matches");
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return true;
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}
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}
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// Here we failed to go backwards past the last history item.
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return false;
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}
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public:
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reader_history_search_t() = default;
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~reader_history_search_t() = default;
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bool active() const { return mode_ != inactive; }
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bool by_token() const { return mode_ == token; }
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bool by_line() const { return mode_ == line; }
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bool by_prefix() const { return mode_ == prefix; }
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/// Move the history search in the given direction \p dir.
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bool move_in_direction(history_search_direction_t dir) {
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return dir == history_search_direction_t::forward ? move_forwards() : move_backwards();
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}
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/// Go to the beginning (earliest) of the search.
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void go_to_beginning() {
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if (matches_.empty()) return;
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match_index_ = matches_.size() - 1;
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}
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/// Go to the end (most recent) of the search.
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void go_to_end() { match_index_ = 0; }
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/// \return the current search result.
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const wcstring ¤t_result() const {
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assert(match_index_ < matches_.size() && "Invalid match index");
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return matches_.at(match_index_);
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}
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/// \return the string we are searching for.
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const wcstring &search_string() const { return search_.original_term(); }
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/// \return whether we are at the end (most recent) of our search.
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bool is_at_end() const { return match_index_ == 0; }
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// Add an item to skip.
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// \return true if it was added, false if already present.
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bool add_skip(const wcstring &str) { return skips_.insert(str).second; }
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/// Reset, beginning a new line or token mode search.
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void reset_to_mode(const wcstring &text, history_t *hist, mode_t mode) {
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assert(mode != inactive && "mode cannot be inactive in this setter");
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skips_ = {text};
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matches_ = {text};
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match_index_ = 0;
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mode_ = mode;
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// We can skip dedup in history_search_t because we do it ourselves in skips_.
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search_ = history_search_t(
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*hist, text,
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by_prefix() ? history_search_type_t::prefix : history_search_type_t::contains,
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history_search_no_dedup);
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}
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/// Reset to inactive search.
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void reset() {
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matches_.clear();
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skips_.clear();
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match_index_ = 0;
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mode_ = inactive;
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search_ = history_search_t();
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}
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};
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struct autosuggestion_result_t {
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wcstring suggestion;
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wcstring search_string;
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};
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struct highlight_result_t {
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std::vector<highlight_spec_t> colors;
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wcstring text;
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};
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} // namespace
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struct readline_loop_state_t;
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/// A struct describing the state of the interactive reader. These states can be stacked, in case
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/// reader_readline() calls are nested. This happens when the 'read' builtin is used.
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class reader_data_t : public std::enable_shared_from_this<reader_data_t> {
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public:
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/// The parser being used.
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std::shared_ptr<parser_t> parser_ref;
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/// String containing the whole current commandline.
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editable_line_t command_line;
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/// Whether the most recent modification to the command line was done by either history search
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/// or a pager selection change. When this is true and another transient change is made, the
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/// old transient change will be removed from the undo history.
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bool command_line_has_transient_edit = false;
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/// String containing the autosuggestion.
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wcstring autosuggestion;
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/// Current pager.
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pager_t pager;
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/// Current page rendering.
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page_rendering_t current_page_rendering;
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/// Whether autosuggesting is allowed at all.
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bool allow_autosuggestion{false};
|
|
/// When backspacing, we temporarily suppress autosuggestions.
|
|
bool suppress_autosuggestion{false};
|
|
/// Whether abbreviations are expanded.
|
|
bool expand_abbreviations{false};
|
|
/// Silent mode used for password input on the read command
|
|
bool silent{false};
|
|
/// The representation of the current screen contents.
|
|
screen_t screen;
|
|
/// The source of input events.
|
|
inputter_t inputter;
|
|
/// The history.
|
|
history_t *history{nullptr};
|
|
/// The history search.
|
|
reader_history_search_t history_search{};
|
|
/// Indicates whether a selection is currently active.
|
|
bool sel_active{false};
|
|
/// The position of the cursor, when selection was initiated.
|
|
size_t sel_begin_pos{0};
|
|
/// The start position of the current selection, if one.
|
|
size_t sel_start_pos{0};
|
|
/// The stop position of the current selection, if one.
|
|
size_t sel_stop_pos{0};
|
|
/// The prompt commands.
|
|
wcstring left_prompt;
|
|
wcstring right_prompt;
|
|
/// The output of the last evaluation of the prompt command.
|
|
wcstring left_prompt_buff;
|
|
wcstring mode_prompt_buff;
|
|
/// The output of the last evaluation of the right prompt command.
|
|
wcstring right_prompt_buff;
|
|
/// Completion support.
|
|
wcstring cycle_command_line;
|
|
size_t cycle_cursor_pos{0};
|
|
/// Color is the syntax highlighting for buff. The format is that color[i] is the
|
|
/// classification (according to the enum in highlight.h) of buff[i].
|
|
std::vector<highlight_spec_t> colors;
|
|
/// An array defining the block level at each character.
|
|
std::vector<int> indents;
|
|
/// Whether tab completion is allowed.
|
|
bool complete_ok{false};
|
|
/// Function for syntax highlighting.
|
|
highlight_function_t highlight_func{highlight_universal};
|
|
/// Function for testing if the string can be returned.
|
|
test_function_t test_func{default_test};
|
|
/// If this is true, exit reader even if there are running jobs. This happens if we press e.g.
|
|
/// ^D twice.
|
|
bool prev_end_loop{false};
|
|
/// The current contents of the top item in the kill ring.
|
|
wcstring kill_item;
|
|
/// Keep track of whether any internal code has done something which is known to require a
|
|
/// repaint.
|
|
bool repaint_needed{false};
|
|
/// Whether a screen reset is needed after a repaint.
|
|
bool screen_reset_needed{false};
|
|
/// Whether the reader should exit on ^C.
|
|
bool exit_on_interrupt{false};
|
|
/// The target character of the last jump command.
|
|
wchar_t last_jump_target{0};
|
|
jump_direction_t last_jump_direction{jump_direction_t::forward};
|
|
jump_precision_t last_jump_precision{jump_precision_t::to};
|
|
|
|
bool is_navigating_pager_contents() const { return this->pager.is_navigating_contents(); }
|
|
|
|
/// The line that is currently being edited. Typically the command line, but may be the search
|
|
/// field.
|
|
const editable_line_t *active_edit_line() const {
|
|
if (this->is_navigating_pager_contents() && this->pager.is_search_field_shown()) {
|
|
return &this->pager.search_field_line;
|
|
}
|
|
return &this->command_line;
|
|
}
|
|
|
|
editable_line_t *active_edit_line() {
|
|
auto cthis = reinterpret_cast<const reader_data_t *>(this);
|
|
return const_cast<editable_line_t *>(cthis->active_edit_line());
|
|
}
|
|
|
|
/// Do what we need to do whenever our command line changes.
|
|
void command_line_changed(const editable_line_t *el);
|
|
|
|
/// Do what we need to do whenever our pager selection changes.
|
|
void pager_selection_changed();
|
|
|
|
/// Expand abbreviations at the current cursor position, minus backtrack_amt.
|
|
bool expand_abbreviation_as_necessary(size_t cursor_backtrack);
|
|
|
|
void repaint_if_needed();
|
|
|
|
/// Return the variable set used for e.g. command duration.
|
|
env_stack_t &vars() { return parser_ref->vars(); }
|
|
const env_stack_t &vars() const { return parser_ref->vars(); }
|
|
|
|
/// Access the parser.
|
|
parser_t &parser() { return *parser_ref; }
|
|
|
|
reader_data_t(std::shared_ptr<parser_t> parser, history_t *hist)
|
|
: parser_ref(std::move(parser)), inputter(*parser_ref), history(hist) {}
|
|
|
|
void update_buff_pos(editable_line_t *el, maybe_t<size_t> new_pos = none_t());
|
|
void repaint();
|
|
void kill(editable_line_t *el, size_t begin_idx, size_t length, int mode, int newv);
|
|
bool insert_string(editable_line_t *el, const wcstring &str);
|
|
|
|
/// Insert the character into the command line buffer and print it to the screen using syntax
|
|
/// highlighting, etc.
|
|
bool insert_char(editable_line_t *el, wchar_t c) { return insert_string(el, wcstring{c}); }
|
|
|
|
void move_word(editable_line_t *el, bool move_right, bool erase, enum move_word_style_t style,
|
|
bool newv);
|
|
|
|
maybe_t<wcstring> readline(int nchars);
|
|
maybe_t<char_event_t> read_normal_chars(readline_loop_state_t &rls);
|
|
void handle_readline_command(readline_cmd_t cmd, readline_loop_state_t &rls);
|
|
|
|
void clear_pager();
|
|
void select_completion_in_direction(selection_motion_t dir);
|
|
void flash();
|
|
|
|
void mark_repaint_needed() { repaint_needed = true; }
|
|
|
|
void completion_insert(const wchar_t *val, size_t token_end, complete_flags_t flags);
|
|
|
|
bool can_autosuggest() const;
|
|
void autosuggest_completed(autosuggestion_result_t result);
|
|
void update_autosuggestion();
|
|
void accept_autosuggestion(bool full, bool single = false, move_word_style_t style = move_word_style_punctuation);
|
|
void super_highlight_me_plenty(int highlight_pos_adjust = 0, bool no_io = false);
|
|
|
|
void highlight_search();
|
|
void highlight_complete(highlight_result_t result);
|
|
void exec_mode_prompt();
|
|
void exec_prompt();
|
|
|
|
bool jump(jump_direction_t dir, jump_precision_t precision, editable_line_t *el,
|
|
wchar_t target);
|
|
|
|
bool handle_completions(const completion_list_t &comp, size_t token_begin, size_t token_end);
|
|
|
|
void sanity_check() const;
|
|
void set_command_line_and_position(editable_line_t *el, wcstring &&new_str, size_t pos);
|
|
void clear_transient_edit();
|
|
void replace_current_token(wcstring &&new_token);
|
|
void update_command_line_from_history_search();
|
|
void set_buffer_maintaining_pager(const wcstring &b, size_t pos, bool transient = false);
|
|
void delete_char(bool backward = true);
|
|
|
|
/// Called to update the termsize, including $COLUMNS and $LINES, as necessary.
|
|
void update_termsize() { (void)termsize_container_t::shared().updating(parser()); }
|
|
};
|
|
|
|
/// This variable is set to a signal by the signal handler when ^C is pressed.
|
|
static volatile sig_atomic_t interrupted = 0;
|
|
|
|
// Prototypes for a bunch of functions defined later on.
|
|
static bool is_backslashed(const wcstring &str, size_t pos);
|
|
static wchar_t unescaped_quote(const wcstring &str, size_t pos);
|
|
|
|
/// Mode on startup, which we restore on exit.
|
|
static struct termios terminal_mode_on_startup;
|
|
|
|
/// Mode we use to execute programs.
|
|
static struct termios tty_modes_for_external_cmds;
|
|
|
|
/// Restore terminal settings we care about, to prevent a broken shell.
|
|
static void term_fix_modes(struct termios *modes) {
|
|
modes->c_iflag &= ~ICRNL; // disable mapping CR (\cM) to NL (\cJ)
|
|
modes->c_iflag &= ~INLCR; // disable mapping NL (\cJ) to CR (\cM)
|
|
modes->c_lflag &= ~ICANON; // turn off canonical mode
|
|
modes->c_lflag &= ~ECHO; // turn off echo mode
|
|
modes->c_lflag &= ~IEXTEN; // turn off handling of discard and lnext characters
|
|
modes->c_oflag |= OPOST; // turn on "implementation-defined post processing" - this often
|
|
// changes how line breaks work.
|
|
|
|
// Disable flow control in the shell. We don't want to be stopped.
|
|
modes->c_iflag &= ~IXON;
|
|
modes->c_iflag &= ~IXOFF;
|
|
|
|
modes->c_cc[VMIN] = 1;
|
|
modes->c_cc[VTIME] = 0;
|
|
|
|
unsigned char disabling_char = '\0';
|
|
// Prefer to use _POSIX_VDISABLE to disable control functions.
|
|
// This permits separately binding nul (typically control-space).
|
|
// POSIX calls out -1 as a special value which should be ignored.
|
|
#ifdef _POSIX_VDISABLE
|
|
if (_POSIX_VDISABLE != -1) disabling_char = _POSIX_VDISABLE;
|
|
#endif
|
|
|
|
// We ignore these anyway, so there is no need to sacrifice a character.
|
|
modes->c_cc[VSUSP] = disabling_char;
|
|
|
|
// (these two are already disabled because of IXON/IXOFF)
|
|
modes->c_cc[VSTOP] = disabling_char;
|
|
modes->c_cc[VSTART] = disabling_char;
|
|
}
|
|
|
|
/// Tracks a currently pending exit. This may be manipulated from a signal handler.
|
|
|
|
/// Whether we should exit the current reader loop.
|
|
static relaxed_atomic_bool_t s_end_current_loop{false};
|
|
|
|
/// Whether we should exit all reader loops. This is set in response to a HUP signal and it
|
|
/// latches (once set it is never cleared). This should never be reset to false.
|
|
static volatile sig_atomic_t s_exit_forced{false};
|
|
static volatile sig_atomic_t s_pending_exit_forced{false};
|
|
|
|
void reader_sighup() {
|
|
// Beware, we are in a signal handler
|
|
s_pending_exit_forced = true;
|
|
}
|
|
|
|
static bool should_exit(parser_t *parser = nullptr) {
|
|
static bool s_tty_redirected = false;
|
|
// To make fish_exit safe to use in the event of SIGHUP, first redirect the tty
|
|
// to avoid a user script triggering SIGTTIN or SIGTTOU.
|
|
if (!s_tty_redirected && s_pending_exit_forced) {
|
|
redirect_tty_output();
|
|
s_tty_redirected = true;
|
|
}
|
|
|
|
// s_exit_forced cannot be unset and prevents all future execution. Since we might
|
|
// still have to run the fish_exit handlers, we first set s_pending_exit_force and
|
|
// then translate that into s_exit_forced here, after running whatever we need to
|
|
// guarantee runs.
|
|
if (parser && s_pending_exit_forced) {
|
|
s_pending_exit_forced = false;
|
|
// If we don't call fish_exit here, it'll be called later but won't be able to
|
|
// execute anything as our loop will be blocked from running.
|
|
event_fire_generic(*parser, L"fish_exit");
|
|
// Only now can the flag be set
|
|
s_exit_forced = true;
|
|
}
|
|
|
|
return s_exit_forced || s_end_current_loop;
|
|
}
|
|
|
|
/// Give up control of terminal.
|
|
static void term_donate(outputter_t &outp) {
|
|
outp.set_color(rgb_color_t::normal(), rgb_color_t::normal());
|
|
|
|
while (true) {
|
|
if (tcsetattr(STDIN_FILENO, TCSANOW, &tty_modes_for_external_cmds) == -1) {
|
|
if (errno == EIO) redirect_tty_output();
|
|
if (errno != EINTR) {
|
|
FLOGF(warning, _(L"Could not set terminal mode for new job"));
|
|
wperror(L"tcsetattr");
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// Grab control of terminal.
|
|
static void term_steal() {
|
|
// Copy the (potentially changed) terminal modes and use them from now on.
|
|
struct termios modes;
|
|
tcgetattr(STDIN_FILENO, &modes);
|
|
std::memcpy(&tty_modes_for_external_cmds, &modes, sizeof tty_modes_for_external_cmds);
|
|
// Turning off OPOST breaks output (staircase effect), we don't allow it.
|
|
// See #7133.
|
|
tty_modes_for_external_cmds.c_oflag |= OPOST;
|
|
// These cause other ridiculous behaviors like input not being shown.
|
|
tty_modes_for_external_cmds.c_lflag |= ICANON;
|
|
tty_modes_for_external_cmds.c_lflag |= IEXTEN;
|
|
tty_modes_for_external_cmds.c_lflag |= ECHO;
|
|
tty_modes_for_external_cmds.c_iflag |= ICRNL;
|
|
tty_modes_for_external_cmds.c_iflag |= INLCR;
|
|
|
|
while (true) {
|
|
if (tcsetattr(STDIN_FILENO, TCSANOW, &shell_modes) == -1) {
|
|
if (errno == EIO) redirect_tty_output();
|
|
if (errno != EINTR) {
|
|
FLOGF(warning, _(L"Could not set terminal mode for shell"));
|
|
perror("tcsetattr");
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
}
|
|
|
|
termsize_container_t::shared().invalidate_tty();
|
|
}
|
|
|
|
bool reader_exit_forced() { return s_exit_forced; }
|
|
|
|
/// Given a command line and an autosuggestion, return the string that gets shown to the user.
|
|
wcstring combine_command_and_autosuggestion(const wcstring &cmdline,
|
|
const wcstring &autosuggestion) {
|
|
// We want to compute the full line, containing the command line and the autosuggestion They may
|
|
// disagree on whether characters are uppercase or lowercase Here we do something funny: if the
|
|
// last token of the command line contains any uppercase characters, we use its case. Otherwise
|
|
// we use the case of the autosuggestion. This is an idea from issue #335.
|
|
wcstring full_line;
|
|
if (autosuggestion.size() <= cmdline.size() || cmdline.empty()) {
|
|
// No or useless autosuggestion, or no command line.
|
|
full_line = cmdline;
|
|
} else if (string_prefixes_string(cmdline, autosuggestion)) {
|
|
// No case disagreements, or no extra characters in the autosuggestion.
|
|
full_line = autosuggestion;
|
|
} else {
|
|
// We have an autosuggestion which is not a prefix of the command line, i.e. a case
|
|
// disagreement. Decide whose case we want to use.
|
|
const wchar_t *begin = nullptr, *cmd = cmdline.c_str();
|
|
parse_util_token_extent(cmd, cmdline.size() - 1, &begin, nullptr, nullptr, nullptr);
|
|
bool last_token_contains_uppercase = false;
|
|
if (begin) {
|
|
const wchar_t *end = begin + std::wcslen(begin);
|
|
last_token_contains_uppercase = (std::find_if(begin, end, iswupper) != end);
|
|
}
|
|
if (!last_token_contains_uppercase) {
|
|
// Use the autosuggestion's case.
|
|
full_line = autosuggestion;
|
|
} else {
|
|
// Use the command line case for its characters, then append the remaining characters in
|
|
// the autosuggestion. Note that we know that autosuggestion.size() > cmdline.size() due
|
|
// to the first test above.
|
|
full_line = cmdline;
|
|
full_line.append(autosuggestion, cmdline.size(),
|
|
autosuggestion.size() - cmdline.size());
|
|
}
|
|
}
|
|
return full_line;
|
|
}
|
|
|
|
/// Update the cursor position.
|
|
void reader_data_t::update_buff_pos(editable_line_t *el, maybe_t<size_t> new_pos) {
|
|
if (new_pos) {
|
|
el->set_position(*new_pos);
|
|
}
|
|
size_t buff_pos = el->position();
|
|
if (el == &command_line && sel_active) {
|
|
if (sel_begin_pos <= buff_pos) {
|
|
sel_start_pos = sel_begin_pos;
|
|
sel_stop_pos = buff_pos + 1;
|
|
} else {
|
|
sel_start_pos = buff_pos;
|
|
sel_stop_pos = sel_begin_pos + 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Repaint the entire commandline. This means reset and clear the commandline, write the prompt,
|
|
/// perform syntax highlighting, write the commandline and move the cursor.
|
|
void reader_data_t::repaint() {
|
|
editable_line_t *cmd_line = &command_line;
|
|
// Update the indentation.
|
|
indents = parse_util_compute_indents(cmd_line->text());
|
|
|
|
wcstring full_line;
|
|
if (silent) {
|
|
full_line = wcstring(cmd_line->text().length(), get_obfuscation_read_char());
|
|
} else {
|
|
// Combine the command and autosuggestion into one string.
|
|
full_line = combine_command_and_autosuggestion(cmd_line->text(), autosuggestion);
|
|
}
|
|
|
|
size_t len = full_line.size();
|
|
if (len < 1) len = 1;
|
|
|
|
std::vector<highlight_spec_t> colors = this->colors;
|
|
colors.resize(len, highlight_role_t::autosuggestion);
|
|
|
|
if (sel_active) {
|
|
highlight_spec_t selection_color = {highlight_role_t::normal, highlight_role_t::selection};
|
|
for (size_t i = sel_start_pos; i < std::min(len, sel_stop_pos); i++) {
|
|
colors[i] = selection_color;
|
|
}
|
|
}
|
|
|
|
std::vector<int> indents = this->indents;
|
|
indents.resize(len);
|
|
|
|
bool focused_on_pager = active_edit_line() == &pager.search_field_line;
|
|
size_t cursor_position = focused_on_pager ? pager.cursor_position() : cmd_line->position();
|
|
|
|
// Prepend the mode prompt to the left prompt.
|
|
s_write(&screen, mode_prompt_buff + left_prompt_buff, right_prompt_buff, full_line,
|
|
cmd_line->size(), colors, indents, cursor_position, pager, current_page_rendering,
|
|
focused_on_pager);
|
|
|
|
repaint_needed = false;
|
|
}
|
|
|
|
/// Internal helper function for handling killing parts of text.
|
|
void reader_data_t::kill(editable_line_t *el, size_t begin_idx, size_t length, int mode, int newv) {
|
|
const wchar_t *begin = el->text().c_str() + begin_idx;
|
|
if (newv) {
|
|
kill_item = wcstring(begin, length);
|
|
kill_add(kill_item);
|
|
} else {
|
|
wcstring old = kill_item;
|
|
if (mode == KILL_APPEND) {
|
|
kill_item.append(begin, length);
|
|
} else {
|
|
kill_item = wcstring(begin, length);
|
|
kill_item.append(old);
|
|
}
|
|
|
|
kill_replace(old, kill_item);
|
|
}
|
|
el->erase_substring(begin_idx, length);
|
|
update_buff_pos(el);
|
|
command_line_changed(el);
|
|
super_highlight_me_plenty();
|
|
repaint();
|
|
}
|
|
|
|
// This is called from a signal handler!
|
|
void reader_handle_sigint() { interrupted = SIGINT; }
|
|
|
|
/// Make sure buffers are large enough to hold the current string length.
|
|
void reader_data_t::command_line_changed(const editable_line_t *el) {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
if (el == &this->command_line) {
|
|
size_t len = this->command_line.size();
|
|
|
|
// When we grow colors, propagate the last color (if any), under the assumption that usually
|
|
// it will be correct. If it is, it avoids a repaint.
|
|
highlight_spec_t last_color = colors.empty() ? highlight_spec_t() : colors.back();
|
|
colors.resize(len, last_color);
|
|
|
|
indents.resize(len);
|
|
|
|
// Update the gen count.
|
|
s_generation.store(1 + read_generation_count(), std::memory_order_relaxed);
|
|
} else if (el == &this->pager.search_field_line) {
|
|
this->pager.refilter_completions();
|
|
this->pager_selection_changed();
|
|
}
|
|
}
|
|
|
|
void reader_data_t::pager_selection_changed() {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
|
|
const completion_t *completion = this->pager.selected_completion(this->current_page_rendering);
|
|
|
|
// Update the cursor and command line.
|
|
size_t cursor_pos = this->cycle_cursor_pos;
|
|
wcstring new_cmd_line;
|
|
|
|
if (completion == nullptr) {
|
|
new_cmd_line = this->cycle_command_line;
|
|
} else {
|
|
new_cmd_line =
|
|
completion_apply_to_command_line(completion->completion, completion->flags,
|
|
this->cycle_command_line, &cursor_pos, false);
|
|
}
|
|
|
|
// Only update if something changed, to avoid useless edits in the undo history.
|
|
if (new_cmd_line != command_line.text()) {
|
|
set_buffer_maintaining_pager(new_cmd_line, cursor_pos, true /* transient */);
|
|
}
|
|
|
|
// Trigger repaint (see issue #765).
|
|
mark_repaint_needed();
|
|
}
|
|
|
|
/// Expand abbreviations at the given cursor position. Does NOT inspect 'data'.
|
|
maybe_t<edit_t> reader_expand_abbreviation_in_command(const wcstring &cmdline, size_t cursor_pos,
|
|
const environment_t &vars) {
|
|
// See if we are at "command position". Get the surrounding command substitution, and get the
|
|
// extent of the first token.
|
|
const wchar_t *const buff = cmdline.c_str();
|
|
const wchar_t *cmdsub_begin = nullptr, *cmdsub_end = nullptr;
|
|
parse_util_cmdsubst_extent(buff, cursor_pos, &cmdsub_begin, &cmdsub_end);
|
|
assert(cmdsub_begin != nullptr && cmdsub_begin >= buff);
|
|
assert(cmdsub_end != nullptr && cmdsub_end >= cmdsub_begin);
|
|
|
|
// Determine the offset of this command substitution.
|
|
const size_t subcmd_offset = cmdsub_begin - buff;
|
|
|
|
const wcstring subcmd = wcstring(cmdsub_begin, cmdsub_end - cmdsub_begin);
|
|
const size_t subcmd_cursor_pos = cursor_pos - subcmd_offset;
|
|
|
|
// Parse this subcmd.
|
|
using namespace ast;
|
|
auto ast =
|
|
ast_t::parse(subcmd, parse_flag_continue_after_error | parse_flag_accept_incomplete_tokens |
|
|
parse_flag_leave_unterminated);
|
|
|
|
// Look for plain statements where the cursor is at the end of the command.
|
|
const ast::string_t *matching_cmd_node = nullptr;
|
|
for (const node_t &n : ast) {
|
|
const decorated_statement_t *stmt = n.try_as<decorated_statement_t>();
|
|
if (!stmt) continue;
|
|
|
|
// Skip if we have a decoration.
|
|
if (stmt->opt_decoration) continue;
|
|
|
|
// See if the command's source range range contains our cursor, including at the end.
|
|
auto msource = stmt->command.try_source_range();
|
|
if (!msource) continue;
|
|
|
|
// Now see if its source range contains our cursor, including at the end.
|
|
if (subcmd_cursor_pos >= msource->start &&
|
|
subcmd_cursor_pos <= msource->start + msource->length) {
|
|
// Success!
|
|
matching_cmd_node = &stmt->command;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Now if we found a command node, expand it.
|
|
maybe_t<edit_t> result{};
|
|
if (matching_cmd_node) {
|
|
assert(!matching_cmd_node->unsourced && "Should not be unsourced");
|
|
const wcstring token = matching_cmd_node->source(subcmd);
|
|
if (auto abbreviation = expand_abbreviation(token, vars)) {
|
|
// There was an abbreviation! Replace the token in the full command. Maintain the
|
|
// relative position of the cursor.
|
|
source_range_t r = matching_cmd_node->source_range();
|
|
result = edit_t(subcmd_offset + r.start, r.length, std::move(*abbreviation));
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// Expand abbreviations at the current cursor position, minus the given cursor backtrack. This may
|
|
/// change the command line but does NOT repaint it. This is to allow the caller to coalesce
|
|
/// repaints.
|
|
bool reader_data_t::expand_abbreviation_as_necessary(size_t cursor_backtrack) {
|
|
bool result = false;
|
|
editable_line_t *el = active_edit_line();
|
|
|
|
if (expand_abbreviations && el == &command_line) {
|
|
// Try expanding abbreviations.
|
|
size_t cursor_pos = el->position() - std::min(el->position(), cursor_backtrack);
|
|
|
|
if (auto edit = reader_expand_abbreviation_in_command(el->text(), cursor_pos, vars())) {
|
|
el->push_edit(std::move(*edit));
|
|
update_buff_pos(el);
|
|
el->undo_history.may_coalesce = false;
|
|
command_line_changed(el);
|
|
result = true;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void reader_data_t::repaint_if_needed() {
|
|
bool needs_reset = screen_reset_needed;
|
|
bool needs_repaint = needs_reset || repaint_needed;
|
|
|
|
if (needs_reset) {
|
|
exec_prompt();
|
|
s_reset_line(&screen, true /* repaint prompt */);
|
|
screen_reset_needed = false;
|
|
}
|
|
|
|
if (needs_repaint) {
|
|
repaint(); // reader_repaint clears repaint_needed
|
|
}
|
|
}
|
|
|
|
void reader_reset_interrupted() { interrupted = 0; }
|
|
|
|
int reader_test_and_clear_interrupted() {
|
|
int res = interrupted;
|
|
if (res) {
|
|
interrupted = 0;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
void reader_write_title(const wcstring &cmd, parser_t &parser, bool reset_cursor_position) {
|
|
if (!term_supports_setting_title()) return;
|
|
|
|
scoped_push<bool> noninteractive{&parser.libdata().is_interactive, false};
|
|
scoped_push<bool> in_title(&parser.libdata().suppress_fish_trace, true);
|
|
|
|
wcstring fish_title_command = DEFAULT_TITLE;
|
|
if (function_exists(L"fish_title", parser)) {
|
|
fish_title_command = L"fish_title";
|
|
if (!cmd.empty()) {
|
|
fish_title_command.append(L" ");
|
|
fish_title_command.append(
|
|
escape_string(cmd, ESCAPE_ALL | ESCAPE_NO_QUOTED | ESCAPE_NO_TILDE));
|
|
}
|
|
}
|
|
|
|
wcstring_list_t lst;
|
|
(void)exec_subshell(fish_title_command, parser, lst, false /* ignore exit status */);
|
|
if (!lst.empty()) {
|
|
std::fputws(L"\x1B]0;", stdout);
|
|
for (const auto &i : lst) {
|
|
std::fputws(i.c_str(), stdout);
|
|
}
|
|
ignore_result(write(STDOUT_FILENO, "\a", 1));
|
|
}
|
|
|
|
outputter_t::stdoutput().set_color(rgb_color_t::reset(), rgb_color_t::reset());
|
|
if (reset_cursor_position && !lst.empty()) {
|
|
// Put the cursor back at the beginning of the line (issue #2453).
|
|
ignore_result(write(STDOUT_FILENO, "\r", 1));
|
|
}
|
|
}
|
|
|
|
void reader_data_t::exec_mode_prompt() {
|
|
mode_prompt_buff.clear();
|
|
if (function_exists(MODE_PROMPT_FUNCTION_NAME, parser())) {
|
|
wcstring_list_t mode_indicator_list;
|
|
exec_subshell(MODE_PROMPT_FUNCTION_NAME, parser(), mode_indicator_list, false);
|
|
// We do not support multiple lines in the mode indicator, so just concatenate all of
|
|
// them.
|
|
for (const auto &i : mode_indicator_list) {
|
|
mode_prompt_buff += i;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Reexecute the prompt command. The output is inserted into prompt_buff.
|
|
void reader_data_t::exec_prompt() {
|
|
// Clear existing prompts.
|
|
left_prompt_buff.clear();
|
|
right_prompt_buff.clear();
|
|
|
|
// Suppress fish_trace while in the prompt.
|
|
scoped_push<bool> in_prompt(&parser().libdata().suppress_fish_trace, true);
|
|
|
|
// Do not allow the exit status of the prompts to leak through.
|
|
const bool apply_exit_status = false;
|
|
|
|
// Update the termsize now.
|
|
// This allows prompts to react to $COLUMNS.
|
|
update_termsize();
|
|
|
|
// If we have any prompts, they must be run non-interactively.
|
|
if (!left_prompt.empty() || !right_prompt.empty()) {
|
|
scoped_push<bool> noninteractive{&parser().libdata().is_interactive, false};
|
|
|
|
exec_mode_prompt();
|
|
|
|
if (!left_prompt.empty()) {
|
|
wcstring_list_t prompt_list;
|
|
// Ignore return status.
|
|
exec_subshell(left_prompt, parser(), prompt_list, apply_exit_status);
|
|
for (size_t i = 0; i < prompt_list.size(); i++) {
|
|
if (i > 0) left_prompt_buff += L'\n';
|
|
left_prompt_buff += prompt_list.at(i);
|
|
}
|
|
}
|
|
|
|
if (!right_prompt.empty()) {
|
|
wcstring_list_t prompt_list;
|
|
// Status is ignored.
|
|
exec_subshell(right_prompt, parser(), prompt_list, apply_exit_status);
|
|
for (const auto &i : prompt_list) {
|
|
// Right prompt does not support multiple lines, so just concatenate all of them.
|
|
right_prompt_buff += i;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Write the screen title. Do not reset the cursor position: exec_prompt is called when there
|
|
// may still be output on the line from the previous command (#2499) and we need our PROMPT_SP
|
|
// hack to work.
|
|
reader_write_title(L"", parser(), false);
|
|
}
|
|
|
|
void reader_init() {
|
|
parser_t &parser = parser_t::principal_parser();
|
|
auto &vars = parser.vars();
|
|
|
|
// Ensure this var is present even before an interactive command is run so that if it is used
|
|
// in a function like `fish_prompt` or `fish_right_prompt` it is defined at the time the first
|
|
// prompt is written.
|
|
vars.set_one(ENV_CMD_DURATION, ENV_UNEXPORT, L"0");
|
|
|
|
// Save the initial terminal mode.
|
|
tcgetattr(STDIN_FILENO, &terminal_mode_on_startup);
|
|
|
|
// Set the mode used for program execution, initialized to the current mode.
|
|
std::memcpy(&tty_modes_for_external_cmds, &terminal_mode_on_startup,
|
|
sizeof tty_modes_for_external_cmds);
|
|
// Disable flow control for external commands by default.
|
|
tty_modes_for_external_cmds.c_iflag &= ~IXON;
|
|
tty_modes_for_external_cmds.c_iflag &= ~IXOFF;
|
|
tty_modes_for_external_cmds.c_oflag |= OPOST;
|
|
|
|
// Set the mode used for the terminal, initialized to the current mode.
|
|
std::memcpy(&shell_modes, &terminal_mode_on_startup, sizeof shell_modes);
|
|
|
|
term_fix_modes(&shell_modes);
|
|
|
|
// We do this not because we actually need the window size but for its side-effect of correctly
|
|
// setting the COLUMNS and LINES env vars.
|
|
termsize_container_t::shared().updating(parser);
|
|
}
|
|
|
|
/// Restore the term mode if we own the terminal. It's important we do this before
|
|
/// restore_foreground_process_group, otherwise we won't think we own the terminal.
|
|
void restore_term_mode() {
|
|
if (getpgrp() != tcgetpgrp(STDIN_FILENO)) return;
|
|
|
|
if (tcsetattr(STDIN_FILENO, TCSANOW, &terminal_mode_on_startup) == -1 && errno == EIO) {
|
|
redirect_tty_output();
|
|
}
|
|
}
|
|
|
|
/// Exit the current reader loop. This may be invoked from a signal handler.
|
|
void reader_set_end_loop(bool flag) { s_end_current_loop = flag; }
|
|
|
|
/// Called only when we're not able to read/write to our standard input/output,
|
|
/// namely EOF and SIGHUP.
|
|
void reader_force_exit() {
|
|
// Beware, we may be in a signal handler.
|
|
s_pending_exit_forced = true;
|
|
}
|
|
|
|
/// Indicates if the given command char ends paging.
|
|
static bool command_ends_paging(readline_cmd_t c, bool focused_on_search_field) {
|
|
using rl = readline_cmd_t;
|
|
switch (c) {
|
|
case rl::history_prefix_search_backward:
|
|
case rl::history_prefix_search_forward:
|
|
case rl::history_search_backward:
|
|
case rl::history_search_forward:
|
|
case rl::history_token_search_backward:
|
|
case rl::history_token_search_forward:
|
|
case rl::accept_autosuggestion:
|
|
case rl::delete_or_exit:
|
|
case rl::cancel_commandline:
|
|
case rl::cancel: {
|
|
// These commands always end paging.
|
|
return true;
|
|
}
|
|
case rl::complete:
|
|
case rl::complete_and_search:
|
|
case rl::backward_char:
|
|
case rl::forward_char:
|
|
case rl::forward_single_char:
|
|
case rl::up_line:
|
|
case rl::down_line:
|
|
case rl::repaint:
|
|
case rl::suppress_autosuggestion:
|
|
case rl::beginning_of_history:
|
|
case rl::end_of_history: {
|
|
// These commands never end paging.
|
|
return false;
|
|
}
|
|
case rl::execute: {
|
|
// execute does end paging, but only executes if it was not paging. So it's handled
|
|
// specially.
|
|
return false;
|
|
}
|
|
case rl::beginning_of_line:
|
|
case rl::end_of_line:
|
|
case rl::forward_word:
|
|
case rl::backward_word:
|
|
case rl::forward_bigword:
|
|
case rl::backward_bigword:
|
|
case rl::delete_char:
|
|
case rl::backward_delete_char:
|
|
case rl::kill_line:
|
|
case rl::yank:
|
|
case rl::yank_pop:
|
|
case rl::backward_kill_line:
|
|
case rl::kill_whole_line:
|
|
case rl::kill_word:
|
|
case rl::kill_bigword:
|
|
case rl::backward_kill_word:
|
|
case rl::backward_kill_path_component:
|
|
case rl::backward_kill_bigword:
|
|
case rl::self_insert:
|
|
case rl::self_insert_notfirst:
|
|
case rl::transpose_chars:
|
|
case rl::transpose_words:
|
|
case rl::upcase_word:
|
|
case rl::downcase_word:
|
|
case rl::capitalize_word:
|
|
case rl::beginning_of_buffer:
|
|
case rl::end_of_buffer:
|
|
case rl::undo:
|
|
case rl::redo:
|
|
// These commands operate on the search field if that's where the focus is.
|
|
return !focused_on_search_field;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// Indicates if the given command ends the history search.
|
|
static bool command_ends_history_search(readline_cmd_t c) {
|
|
switch (c) {
|
|
case readline_cmd_t::history_prefix_search_backward:
|
|
case readline_cmd_t::history_prefix_search_forward:
|
|
case readline_cmd_t::history_search_backward:
|
|
case readline_cmd_t::history_search_forward:
|
|
case readline_cmd_t::history_token_search_backward:
|
|
case readline_cmd_t::history_token_search_forward:
|
|
case readline_cmd_t::beginning_of_history:
|
|
case readline_cmd_t::end_of_history:
|
|
case readline_cmd_t::repaint:
|
|
case readline_cmd_t::force_repaint:
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/// Remove the previous character in the character buffer and on the screen using syntax
|
|
/// highlighting, etc.
|
|
void reader_data_t::delete_char(bool backward) {
|
|
editable_line_t *el = active_edit_line();
|
|
|
|
size_t pos = el->position();
|
|
if (!backward) {
|
|
pos++;
|
|
}
|
|
size_t pos_end = pos;
|
|
|
|
if (el->position() == 0 && backward) return;
|
|
|
|
// Fake composed character sequences by continuing to delete until we delete a character of
|
|
// width at least 1.
|
|
int width;
|
|
do {
|
|
pos--;
|
|
width = fish_wcwidth(el->text().at(pos));
|
|
} while (width == 0 && pos > 0);
|
|
el->erase_substring(pos, pos_end - pos);
|
|
update_buff_pos(el);
|
|
command_line_changed(el);
|
|
suppress_autosuggestion = true;
|
|
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
}
|
|
|
|
/// Insert the characters of the string into the command line buffer and print them to the screen
|
|
/// using syntax highlighting, etc.
|
|
/// Returns true if the string changed.
|
|
bool reader_data_t::insert_string(editable_line_t *el, const wcstring &str) {
|
|
if (str.empty()) return false;
|
|
|
|
el->insert_string(str, 0, str.size());
|
|
update_buff_pos(el);
|
|
command_line_changed(el);
|
|
|
|
if (el == &command_line) {
|
|
suppress_autosuggestion = false;
|
|
|
|
// Syntax highlight. Note we must have that buff_pos > 0 because we just added something
|
|
// nonzero to its length.
|
|
assert(el->position() > 0);
|
|
super_highlight_me_plenty(-1);
|
|
}
|
|
|
|
repaint();
|
|
return true;
|
|
}
|
|
|
|
/// Insert the string in the given command line at the given cursor position. The function checks if
|
|
/// the string is quoted or not and correctly escapes the string.
|
|
///
|
|
/// \param val the string to insert
|
|
/// \param flags A union of all flags describing the completion to insert. See the completion_t
|
|
/// struct for more information on possible values.
|
|
/// \param command_line The command line into which we will insert
|
|
/// \param inout_cursor_pos On input, the location of the cursor within the command line. On output,
|
|
/// the new desired position.
|
|
/// \param append_only Whether we can only append to the command line, or also modify previous
|
|
/// characters. This is used to determine whether we go inside a trailing quote.
|
|
///
|
|
/// \return The completed string
|
|
wcstring completion_apply_to_command_line(const wcstring &val, complete_flags_t flags,
|
|
const wcstring &command_line, size_t *inout_cursor_pos,
|
|
bool append_only) {
|
|
bool add_space = !bool(flags & COMPLETE_NO_SPACE);
|
|
bool do_replace = bool(flags & COMPLETE_REPLACES_TOKEN);
|
|
bool do_escape = !bool(flags & COMPLETE_DONT_ESCAPE);
|
|
bool no_tilde = bool(flags & COMPLETE_DONT_ESCAPE_TILDES);
|
|
|
|
const size_t cursor_pos = *inout_cursor_pos;
|
|
bool back_into_trailing_quote = false;
|
|
bool have_space_after_token = command_line[cursor_pos] == L' ';
|
|
|
|
if (do_replace) {
|
|
size_t move_cursor;
|
|
const wchar_t *begin, *end;
|
|
|
|
const wchar_t *buff = command_line.c_str();
|
|
parse_util_token_extent(buff, cursor_pos, &begin, nullptr, nullptr, nullptr);
|
|
end = buff + cursor_pos;
|
|
|
|
wcstring sb(buff, begin - buff);
|
|
|
|
if (do_escape) {
|
|
wcstring escaped = escape_string(
|
|
val, ESCAPE_ALL | ESCAPE_NO_QUOTED | (no_tilde ? ESCAPE_NO_TILDE : 0));
|
|
sb.append(escaped);
|
|
move_cursor = escaped.size();
|
|
} else {
|
|
sb.append(val);
|
|
move_cursor = val.length();
|
|
}
|
|
|
|
if (add_space) {
|
|
if (!have_space_after_token) sb.append(L" ");
|
|
move_cursor += 1;
|
|
}
|
|
sb.append(end);
|
|
|
|
size_t new_cursor_pos = (begin - buff) + move_cursor;
|
|
*inout_cursor_pos = new_cursor_pos;
|
|
return sb;
|
|
}
|
|
|
|
wchar_t quote = L'\0';
|
|
wcstring replaced;
|
|
if (do_escape) {
|
|
// We need to figure out whether the token we complete has unclosed quotes. Since the token
|
|
// may be inside a command substitutions we must first determine the extents of the
|
|
// innermost command substitution.
|
|
const wchar_t *cmdsub_begin, *cmdsub_end;
|
|
parse_util_cmdsubst_extent(command_line.c_str(), cursor_pos, &cmdsub_begin, &cmdsub_end);
|
|
size_t cmdsub_offset = cmdsub_begin - command_line.c_str();
|
|
// Find the last quote in the token to complete. By parsing only the string inside any
|
|
// command substitution, we prevent the tokenizer from treating the entire command
|
|
// substitution as one token.
|
|
parse_util_get_parameter_info(
|
|
command_line.substr(cmdsub_offset, (cmdsub_end - cmdsub_begin)),
|
|
cursor_pos - cmdsub_offset, "e, nullptr, nullptr);
|
|
|
|
// If the token is reported as unquoted, but ends with a (unescaped) quote, and we can
|
|
// modify the command line, then delete the trailing quote so that we can insert within
|
|
// the quotes instead of after them. See issue #552.
|
|
if (quote == L'\0' && !append_only && cursor_pos > 0) {
|
|
// The entire token is reported as unquoted...see if the last character is an
|
|
// unescaped quote.
|
|
wchar_t trailing_quote = unescaped_quote(command_line, cursor_pos - 1);
|
|
if (trailing_quote != L'\0') {
|
|
quote = trailing_quote;
|
|
back_into_trailing_quote = true;
|
|
}
|
|
}
|
|
|
|
replaced = parse_util_escape_string_with_quote(val, quote, no_tilde);
|
|
} else {
|
|
replaced = val;
|
|
}
|
|
|
|
size_t insertion_point = cursor_pos;
|
|
if (back_into_trailing_quote) {
|
|
// Move the character back one so we enter the terminal quote.
|
|
assert(insertion_point > 0);
|
|
insertion_point--;
|
|
}
|
|
|
|
// Perform the insertion and compute the new location.
|
|
wcstring result = command_line;
|
|
result.insert(insertion_point, replaced);
|
|
size_t new_cursor_pos = insertion_point + replaced.size() + (back_into_trailing_quote ? 1 : 0);
|
|
if (add_space) {
|
|
if (quote != L'\0' && unescaped_quote(command_line, insertion_point) != quote) {
|
|
// This is a quoted parameter, first print a quote.
|
|
result.insert(new_cursor_pos++, wcstring("e, 1));
|
|
}
|
|
if (!have_space_after_token) result.insert(new_cursor_pos, L" ");
|
|
new_cursor_pos++;
|
|
}
|
|
*inout_cursor_pos = new_cursor_pos;
|
|
return result;
|
|
}
|
|
|
|
/// Insert the string at the current cursor position. The function checks if the string is quoted or
|
|
/// not and correctly escapes the string.
|
|
///
|
|
/// \param val the string to insert
|
|
/// \param token_end the position after the token to complete
|
|
/// \param flags A union of all flags describing the completion to insert. See the completion_t
|
|
/// struct for more information on possible values.
|
|
void reader_data_t::completion_insert(const wchar_t *val, size_t token_end,
|
|
complete_flags_t flags) {
|
|
editable_line_t *el = active_edit_line();
|
|
|
|
// Move the cursor to the end of the token.
|
|
if (el->position() != token_end) {
|
|
update_buff_pos(el, token_end); // repaint() is done later
|
|
}
|
|
|
|
size_t cursor = el->position();
|
|
wcstring new_command_line = completion_apply_to_command_line(val, flags, el->text(), &cursor,
|
|
false /* not append only */);
|
|
set_buffer_maintaining_pager(new_command_line, cursor);
|
|
}
|
|
|
|
static bool may_add_to_history(const wcstring &commandline_prefix) {
|
|
return !commandline_prefix.empty() && commandline_prefix.at(0) != L' ';
|
|
}
|
|
|
|
// Returns a function that can be invoked (potentially
|
|
// on a background thread) to determine the autosuggestion
|
|
static std::function<autosuggestion_result_t(void)> get_autosuggestion_performer(
|
|
parser_t &parser, const wcstring &search_string, size_t cursor_pos, history_t *history) {
|
|
const unsigned int generation_count = read_generation_count();
|
|
auto vars = parser.vars().snapshot();
|
|
const wcstring working_directory = vars->get_pwd_slash();
|
|
// TODO: suspicious use of 'history' here
|
|
// This is safe because histories are immortal, but perhaps
|
|
// this should use shared_ptr
|
|
return [=]() -> autosuggestion_result_t {
|
|
ASSERT_IS_BACKGROUND_THREAD();
|
|
autosuggestion_result_t nothing = {};
|
|
operation_context_t ctx = get_bg_context(vars, generation_count);
|
|
if (ctx.check_cancel()) {
|
|
return nothing;
|
|
}
|
|
|
|
// Let's make sure we aren't using the empty string.
|
|
if (search_string.empty()) {
|
|
return nothing;
|
|
}
|
|
|
|
if (may_add_to_history(search_string)) {
|
|
history_search_t searcher(*history, search_string, history_search_type_t::prefix,
|
|
history_search_flags_t{});
|
|
while (!ctx.check_cancel() && searcher.go_backwards()) {
|
|
const history_item_t &item = searcher.current_item();
|
|
|
|
// Skip items with newlines because they make terrible autosuggestions.
|
|
if (item.str().find(L'\n') != wcstring::npos) continue;
|
|
|
|
if (autosuggest_validate_from_history(item, working_directory, ctx)) {
|
|
// The command autosuggestion was handled specially, so we're done.
|
|
return {searcher.current_string(), search_string};
|
|
}
|
|
}
|
|
}
|
|
|
|
// Maybe cancel here.
|
|
if (ctx.check_cancel()) return nothing;
|
|
|
|
// Here we do something a little funny. If the line ends with a space, and the cursor is not
|
|
// at the end, don't use completion autosuggestions. It ends up being pretty weird seeing
|
|
// stuff get spammed on the right while you go back to edit a line
|
|
const wchar_t last_char = search_string.at(search_string.size() - 1);
|
|
const bool cursor_at_end = (cursor_pos == search_string.size());
|
|
if (!cursor_at_end && iswspace(last_char)) return nothing;
|
|
|
|
// On the other hand, if the line ends with a quote, don't go dumping stuff after the quote.
|
|
if (std::wcschr(L"'\"", last_char) && cursor_at_end) return nothing;
|
|
|
|
// Try normal completions.
|
|
completion_request_flags_t complete_flags = completion_request_t::autosuggestion;
|
|
completion_list_t completions = complete(search_string, complete_flags, ctx);
|
|
completions_sort_and_prioritize(&completions, complete_flags);
|
|
if (!completions.empty()) {
|
|
const completion_t &comp = completions.at(0);
|
|
size_t cursor = cursor_pos;
|
|
wcstring suggestion = completion_apply_to_command_line(
|
|
comp.completion, comp.flags, search_string, &cursor, true /* append only */);
|
|
return {std::move(suggestion), search_string};
|
|
}
|
|
|
|
return nothing;
|
|
};
|
|
}
|
|
|
|
bool reader_data_t::can_autosuggest() const {
|
|
// We autosuggest if suppress_autosuggestion is not set, if we're not doing a history search,
|
|
// and our command line contains a non-whitespace character.
|
|
const editable_line_t *el = active_edit_line();
|
|
const wchar_t *whitespace = L" \t\r\n\v";
|
|
return allow_autosuggestion && !suppress_autosuggestion && history_search.is_at_end() &&
|
|
el == &command_line && el->text().find_first_not_of(whitespace) != wcstring::npos;
|
|
}
|
|
|
|
// Called after an autosuggestion has been computed on a background thread
|
|
void reader_data_t::autosuggest_completed(autosuggestion_result_t result) {
|
|
if (!result.suggestion.empty() && can_autosuggest() &&
|
|
result.search_string == command_line.text() &&
|
|
string_prefixes_string_case_insensitive(result.search_string, result.suggestion)) {
|
|
// Autosuggestion is active and the search term has not changed, so we're good to go.
|
|
autosuggestion = std::move(result.suggestion);
|
|
sanity_check();
|
|
repaint();
|
|
}
|
|
}
|
|
|
|
void reader_data_t::update_autosuggestion() {
|
|
// Updates autosuggestion. We look for an autosuggestion if the command line is non-empty and if
|
|
// we're not doing a history search.
|
|
autosuggestion.clear();
|
|
if (can_autosuggest()) {
|
|
const editable_line_t *el = active_edit_line();
|
|
auto performer =
|
|
get_autosuggestion_performer(parser(), el->text(), el->position(), history);
|
|
auto shared_this = this->shared_from_this();
|
|
debounce_autosuggestions().perform(
|
|
performer, [shared_this](autosuggestion_result_t result) {
|
|
shared_this->autosuggest_completed(std::move(result));
|
|
});
|
|
}
|
|
}
|
|
|
|
// Accept any autosuggestion by replacing the command line with it. If full is true, take the whole
|
|
// thing; if it's false, then respect the passed in style.
|
|
void reader_data_t::accept_autosuggestion(bool full, bool single, move_word_style_t style) {
|
|
if (!autosuggestion.empty()) {
|
|
// Accepting an autosuggestion clears the pager.
|
|
clear_pager();
|
|
|
|
// Accept the autosuggestion.
|
|
if (full) {
|
|
// Just take the whole thing.
|
|
command_line.replace_substring(0, command_line.size(), std::move(autosuggestion));
|
|
} else if (single) {
|
|
command_line.replace_substring(command_line.size(), 0,
|
|
autosuggestion.substr(command_line.size(), 1));
|
|
} else {
|
|
// Accept characters according to the specified style.
|
|
move_word_state_machine_t state(style);
|
|
size_t want;
|
|
for (want = command_line.size(); want < autosuggestion.size(); want++) {
|
|
wchar_t wc = autosuggestion.at(want);
|
|
if (!state.consume_char(wc)) break;
|
|
}
|
|
size_t have = command_line.size();
|
|
command_line.replace_substring(command_line.size(), 0,
|
|
autosuggestion.substr(have, want - have));
|
|
}
|
|
update_buff_pos(&command_line);
|
|
command_line_changed(&command_line);
|
|
super_highlight_me_plenty();
|
|
repaint();
|
|
}
|
|
}
|
|
|
|
// Ensure we have no pager contents.
|
|
void reader_data_t::clear_pager() {
|
|
pager.clear();
|
|
current_page_rendering = page_rendering_t();
|
|
mark_repaint_needed();
|
|
}
|
|
|
|
void reader_data_t::select_completion_in_direction(selection_motion_t dir) {
|
|
bool selection_changed = pager.select_next_completion_in_direction(dir, current_page_rendering);
|
|
if (selection_changed) {
|
|
pager_selection_changed();
|
|
}
|
|
}
|
|
|
|
/// Flash the screen. This function changes the color of the current line momentarily and sends a
|
|
/// BEL to maybe flash the screen or emite a sound, depending on how it is configured.
|
|
void reader_data_t::flash() {
|
|
struct timespec pollint;
|
|
editable_line_t *el = &command_line;
|
|
for (size_t i = 0; i < el->position(); i++) {
|
|
colors.at(i) = highlight_spec_t::make_background(highlight_role_t::search_match);
|
|
}
|
|
|
|
repaint();
|
|
ignore_result(write(STDOUT_FILENO, "\a", 1));
|
|
// The write above changed the timestamp of stdout; ensure we don't therefore reset our screen.
|
|
// See #3693.
|
|
s_save_status(&screen);
|
|
|
|
pollint.tv_sec = 0;
|
|
pollint.tv_nsec = 100 * 1000000;
|
|
nanosleep(&pollint, nullptr);
|
|
|
|
super_highlight_me_plenty();
|
|
repaint();
|
|
}
|
|
|
|
/// Characters that may not be part of a token that is to be replaced by a case insensitive
|
|
/// completion.
|
|
#define REPLACE_UNCLEAN L"$*?({})"
|
|
|
|
/// Check if the specified string can be replaced by a case insensitive completion with the
|
|
/// specified flags.
|
|
///
|
|
/// Advanced tokens like those containing {}-style expansion can not at the moment be replaced,
|
|
/// other than if the new token is already an exact replacement, e.g. if the COMPLETE_DONT_ESCAPE
|
|
/// flag is set.
|
|
static bool reader_can_replace(const wcstring &in, int flags) {
|
|
const wchar_t *str = in.c_str();
|
|
|
|
if (flags & COMPLETE_DONT_ESCAPE) {
|
|
return true;
|
|
}
|
|
|
|
// Test characters that have a special meaning in any character position.
|
|
while (*str) {
|
|
if (std::wcschr(REPLACE_UNCLEAN, *str)) return false;
|
|
str++;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// Determine the best match type for a set of completions.
|
|
static fuzzy_match_type_t get_best_match_type(const completion_list_t &comp) {
|
|
fuzzy_match_type_t best_type = fuzzy_match_none;
|
|
for (const auto &i : comp) {
|
|
best_type = std::min(best_type, i.match.type);
|
|
}
|
|
// If the best type is an exact match, reduce it to prefix match. Otherwise a tab completion
|
|
// will only show one match if it matches a file exactly. (see issue #959).
|
|
if (best_type == fuzzy_match_exact) {
|
|
best_type = fuzzy_match_prefix;
|
|
}
|
|
return best_type;
|
|
}
|
|
|
|
/// Handle the list of completions. This means the following:
|
|
///
|
|
/// - If the list is empty, flash the terminal.
|
|
/// - If the list contains one element, write the whole element, and if the element does not end on
|
|
/// a '/', '@', ':', '.', ',' or a '=', also write a trailing space.
|
|
/// - If the list contains multiple elements, insert their common prefix, if any and display
|
|
/// the list in the pager. Depending on terminal size and the length of the list, the pager
|
|
/// may either show less than a screenfull and exit or use an interactive pager to allow the
|
|
/// user to scroll through the completions.
|
|
///
|
|
/// \param comp the list of completion strings
|
|
/// \param token_begin the position of the token to complete
|
|
/// \param token_end the position after the token to complete
|
|
///
|
|
/// Return true if we inserted text into the command line, false if we did not.
|
|
bool reader_data_t::handle_completions(const completion_list_t &comp, size_t token_begin,
|
|
size_t token_end) {
|
|
bool done = false;
|
|
bool success = false;
|
|
const editable_line_t *el = &command_line;
|
|
|
|
const wcstring tok(el->text().c_str() + token_begin, token_end - token_begin);
|
|
|
|
// Check trivial cases.
|
|
size_t size = comp.size();
|
|
if (size == 0) {
|
|
// No suitable completions found, flash screen and return.
|
|
flash();
|
|
done = true;
|
|
} else if (size == 1) {
|
|
// Exactly one suitable completion found - insert it.
|
|
const completion_t &c = comp.at(0);
|
|
|
|
// If this is a replacement completion, check that we know how to replace it, e.g. that
|
|
// the token doesn't contain evil operators like {}.
|
|
if (!(c.flags & COMPLETE_REPLACES_TOKEN) || reader_can_replace(tok, c.flags)) {
|
|
completion_insert(c.completion.c_str(), token_end, c.flags);
|
|
}
|
|
done = true;
|
|
success = true;
|
|
}
|
|
|
|
if (done) {
|
|
return success;
|
|
}
|
|
|
|
fuzzy_match_type_t best_match_type = get_best_match_type(comp);
|
|
|
|
// Determine whether we are going to replace the token or not. If any commands of the best
|
|
// type do not require replacement, then ignore all those that want to use replacement.
|
|
bool will_replace_token = true;
|
|
for (const completion_t &el : comp) {
|
|
if (el.match.type <= best_match_type && !(el.flags & COMPLETE_REPLACES_TOKEN)) {
|
|
will_replace_token = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Decide which completions survived. There may be a lot of them; it would be nice if we could
|
|
// figure out how to avoid copying them here.
|
|
completion_list_t surviving_completions;
|
|
for (const completion_t &el : comp) {
|
|
// Ignore completions with a less suitable match type than the best.
|
|
if (el.match.type > best_match_type) continue;
|
|
|
|
// Only use completions that match replace_token.
|
|
bool completion_replace_token = static_cast<bool>(el.flags & COMPLETE_REPLACES_TOKEN);
|
|
if (completion_replace_token != will_replace_token) continue;
|
|
|
|
// Don't use completions that want to replace, if we cannot replace them.
|
|
if (completion_replace_token && !reader_can_replace(tok, el.flags)) continue;
|
|
|
|
// This completion survived.
|
|
surviving_completions.push_back(el);
|
|
}
|
|
|
|
bool use_prefix = false;
|
|
wcstring common_prefix;
|
|
if (match_type_shares_prefix(best_match_type)) {
|
|
// Try to find a common prefix to insert among the surviving completions.
|
|
complete_flags_t flags = 0;
|
|
bool prefix_is_partial_completion = false;
|
|
bool first = true;
|
|
for (const completion_t &el : surviving_completions) {
|
|
if (first) {
|
|
// First entry, use the whole string.
|
|
common_prefix = el.completion;
|
|
flags = el.flags;
|
|
first = false;
|
|
} else {
|
|
// Determine the shared prefix length.
|
|
size_t idx, max = std::min(common_prefix.size(), el.completion.size());
|
|
|
|
for (idx = 0; idx < max; idx++) {
|
|
wchar_t ac = common_prefix.at(idx), bc = el.completion.at(idx);
|
|
bool matches = (ac == bc);
|
|
// If we are replacing the token, allow case to vary.
|
|
if (will_replace_token && !matches) {
|
|
// Hackish way to compare two strings in a case insensitive way,
|
|
// hopefully better than towlower().
|
|
matches = (wcsncasecmp(&ac, &bc, 1) == 0);
|
|
}
|
|
if (!matches) break;
|
|
}
|
|
|
|
// idx is now the length of the new common prefix.
|
|
common_prefix.resize(idx);
|
|
prefix_is_partial_completion = true;
|
|
|
|
// Early out if we decide there's no common prefix.
|
|
if (idx == 0) break;
|
|
}
|
|
}
|
|
|
|
// Determine if we use the prefix. We use it if it's non-empty and it will actually make
|
|
// the command line longer. It may make the command line longer by virtue of not using
|
|
// REPLACE_TOKEN (so it always appends to the command line), or by virtue of replacing
|
|
// the token but being longer than it.
|
|
use_prefix = common_prefix.size() > (will_replace_token ? tok.size() : 0);
|
|
assert(!use_prefix || !common_prefix.empty());
|
|
|
|
if (use_prefix) {
|
|
// We got something. If more than one completion contributed, then it means we have
|
|
// a prefix; don't insert a space after it.
|
|
if (prefix_is_partial_completion) flags |= COMPLETE_NO_SPACE;
|
|
completion_insert(common_prefix.c_str(), token_end, flags);
|
|
cycle_command_line = command_line.text();
|
|
cycle_cursor_pos = command_line.position();
|
|
}
|
|
}
|
|
|
|
if (use_prefix) {
|
|
for (completion_t &c : surviving_completions) {
|
|
c.flags &= ~COMPLETE_REPLACES_TOKEN;
|
|
wcstring &comp = c.completion;
|
|
comp.erase(comp.begin(), comp.begin() + common_prefix.size());
|
|
}
|
|
}
|
|
|
|
// Print the completion list.
|
|
wcstring prefix;
|
|
if (will_replace_token || match_type_requires_full_replacement(best_match_type)) {
|
|
if (use_prefix) prefix = std::move(common_prefix);
|
|
} else if (tok.size() + common_prefix.size() <= PREFIX_MAX_LEN) {
|
|
prefix = tok + common_prefix;
|
|
} else {
|
|
// Append just the end of the string.
|
|
prefix = wcstring{get_ellipsis_char()};
|
|
prefix.append(tok + common_prefix, tok.size() + common_prefix.size() - PREFIX_MAX_LEN,
|
|
PREFIX_MAX_LEN);
|
|
}
|
|
|
|
// Update the pager data.
|
|
pager.set_prefix(prefix);
|
|
pager.set_completions(surviving_completions);
|
|
// Invalidate our rendering.
|
|
current_page_rendering = page_rendering_t();
|
|
// Modify the command line to reflect the new pager.
|
|
pager_selection_changed();
|
|
mark_repaint_needed();
|
|
return false;
|
|
}
|
|
|
|
/// Return true if we believe ourselves to be orphaned. loop_count is how many times we've tried to
|
|
/// stop ourselves via SIGGTIN.
|
|
static bool check_for_orphaned_process(unsigned long loop_count, pid_t shell_pgid) {
|
|
bool we_think_we_are_orphaned = false;
|
|
// Try kill-0'ing the process whose pid corresponds to our process group ID. It's possible this
|
|
// will fail because we don't have permission to signal it. But more likely it will fail because
|
|
// it no longer exists, and we are orphaned.
|
|
if (loop_count % 64 == 0 && kill(shell_pgid, 0) < 0 && errno == ESRCH) {
|
|
we_think_we_are_orphaned = true;
|
|
}
|
|
|
|
// Try reading from the tty; if we get EIO we are orphaned. This is sort of bad because it
|
|
// may block.
|
|
if (!we_think_we_are_orphaned && loop_count % 128 == 0) {
|
|
#ifdef HAVE_CTERMID_R
|
|
char buf[L_ctermid];
|
|
char *tty = ctermid_r(buf);
|
|
#else
|
|
char *tty = ctermid(nullptr);
|
|
#endif
|
|
if (!tty) {
|
|
wperror(L"ctermid");
|
|
exit_without_destructors(1);
|
|
}
|
|
|
|
// Open the tty. Presumably this is stdin, but maybe not?
|
|
autoclose_fd_t tty_fd{open(tty, O_RDONLY | O_NONBLOCK)};
|
|
if (!tty_fd.valid()) {
|
|
wperror(L"open");
|
|
exit_without_destructors(1);
|
|
}
|
|
|
|
char tmp;
|
|
if (read(tty_fd.fd(), &tmp, 1) < 0 && errno == EIO) {
|
|
we_think_we_are_orphaned = true;
|
|
}
|
|
}
|
|
|
|
// Just give up if we've done it a lot times.
|
|
if (loop_count > 4096) {
|
|
we_think_we_are_orphaned = true;
|
|
}
|
|
|
|
return we_think_we_are_orphaned;
|
|
}
|
|
|
|
// Ensure that fish owns the terminal, possibly waiting. If we cannot acquire the terminal, then
|
|
// report an error and exit.
|
|
static void acquire_tty_or_exit(pid_t shell_pgid) {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
|
|
// Check if we are in control of the terminal, so that we don't do semi-expensive things like
|
|
// reset signal handlers unless we really have to, which we often don't.
|
|
// Common case.
|
|
if (tcgetpgrp(STDIN_FILENO) == shell_pgid) {
|
|
return;
|
|
}
|
|
|
|
// Bummer, we are not in control of the terminal. Stop until parent has given us control of
|
|
// it.
|
|
//
|
|
// In theory, reseting signal handlers could cause us to miss signal deliveries. In
|
|
// practice, this code should only be run during startup, when we're not waiting for any
|
|
// signals.
|
|
signal_reset_handlers();
|
|
cleanup_t restore_sigs([] { signal_set_handlers(true); });
|
|
|
|
// Ok, signal handlers are taken out of the picture. Stop ourself in a loop until we are in
|
|
// control of the terminal. However, the call to signal(SIGTTIN) may silently not do
|
|
// anything if we are orphaned.
|
|
//
|
|
// As far as I can tell there's no really good way to detect that we are orphaned. One way
|
|
// is to just detect if the group leader exited, via kill(shell_pgid, 0). Another
|
|
// possibility is that read() from the tty fails with EIO - this is more reliable but it's
|
|
// harder, because it may succeed or block. So we loop for a while, trying those strategies.
|
|
// Eventually we just give up and assume we're orphaend.
|
|
for (unsigned loop_count = 0;; loop_count++) {
|
|
pid_t owner = tcgetpgrp(STDIN_FILENO);
|
|
// 0 is a valid return code from `tcgetpgrp()` under at least FreeBSD and testing
|
|
// indicates that a subsequent call to `tcsetpgrp()` will succeed. 0 is the
|
|
// pid of the top-level kernel process, so I'm not sure if this means ownership
|
|
// of the terminal has gone back to the kernel (i.e. it's not owned) or if it is
|
|
// just an "invalid" pid for all intents and purposes.
|
|
if (owner == 0) {
|
|
tcsetpgrp(STDIN_FILENO, shell_pgid);
|
|
// Since we expect the above to work, call `tcgetpgrp()` immediately to
|
|
// avoid a second pass through this loop.
|
|
owner = tcgetpgrp(STDIN_FILENO);
|
|
}
|
|
if (owner == -1 && errno == ENOTTY) {
|
|
if (session_interactivity() == session_interactivity_t::not_interactive) {
|
|
// It's OK if we're not able to take control of the terminal. We handle
|
|
// the fallout from this in a few other places.
|
|
break;
|
|
}
|
|
// No TTY, cannot be interactive?
|
|
redirect_tty_output();
|
|
FLOGF(warning, _(L"No TTY for interactive shell (tcgetpgrp failed)"));
|
|
wperror(L"setpgid");
|
|
exit_without_destructors(1);
|
|
}
|
|
if (owner == shell_pgid) {
|
|
break; // success
|
|
} else {
|
|
if (check_for_orphaned_process(loop_count, shell_pgid)) {
|
|
// We're orphaned, so we just die. Another sad statistic.
|
|
const wchar_t *fmt =
|
|
_(L"I appear to be an orphaned process, so I am quitting politely. "
|
|
L"My pid is %d.");
|
|
FLOGF(warning, fmt, static_cast<int>(getpid()));
|
|
exit_without_destructors(1);
|
|
}
|
|
|
|
// Try stopping us.
|
|
int ret = killpg(shell_pgid, SIGTTIN);
|
|
if (ret < 0) {
|
|
wperror(L"killpg(shell_pgid, SIGTTIN)");
|
|
exit_without_destructors(1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Initialize data for interactive use.
|
|
static void reader_interactive_init(parser_t &parser) {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
|
|
pid_t shell_pgid = getpgrp();
|
|
|
|
// Set up key bindings.
|
|
init_input();
|
|
|
|
// Ensure interactive signal handling is enabled.
|
|
signal_set_handlers_once(true);
|
|
|
|
// Wait until we own the terminal.
|
|
acquire_tty_or_exit(shell_pgid);
|
|
|
|
// It shouldn't be necessary to place fish in its own process group and force control
|
|
// of the terminal, but that works around fish being started with an invalid pgroup,
|
|
// such as when launched via firejail (#5295)
|
|
// Also become the process group leader if flag -i/--interactive was given (#5909).
|
|
if (shell_pgid == 0 || session_interactivity() == session_interactivity_t::explicit_) {
|
|
shell_pgid = getpid();
|
|
if (setpgid(shell_pgid, shell_pgid) < 0) {
|
|
// If we're session leader setpgid returns EPERM. The other cases where we'd get EPERM
|
|
// don't apply as we passed our own pid.
|
|
//
|
|
// This should be harmless, so we ignore it.
|
|
if (errno != EPERM) {
|
|
FLOG(error, _(L"Failed to assign shell to its own process group"));
|
|
wperror(L"setpgid");
|
|
exit_without_destructors(1);
|
|
}
|
|
}
|
|
|
|
// Take control of the terminal
|
|
if (tcsetpgrp(STDIN_FILENO, shell_pgid) == -1) {
|
|
if (errno == ENOTTY) {
|
|
redirect_tty_output();
|
|
}
|
|
FLOG(error, _(L"Failed to take control of the terminal"));
|
|
wperror(L"tcsetpgrp");
|
|
exit_without_destructors(1);
|
|
}
|
|
|
|
// Configure terminal attributes
|
|
if (tcsetattr(0, TCSANOW, &shell_modes) == -1) {
|
|
if (errno == EIO) {
|
|
redirect_tty_output();
|
|
}
|
|
FLOGF(warning, _(L"Failed to set startup terminal mode!"));
|
|
wperror(L"tcsetattr");
|
|
}
|
|
}
|
|
|
|
termsize_container_t::shared().invalidate_tty();
|
|
|
|
// For compatibility with fish 2.0's $_, now replaced with `status current-command`
|
|
parser.vars().set_one(L"_", ENV_GLOBAL, L"fish");
|
|
}
|
|
|
|
/// Destroy data for interactive use.
|
|
static void reader_interactive_destroy() {
|
|
outputter_t::stdoutput().set_color(rgb_color_t::reset(), rgb_color_t::reset());
|
|
}
|
|
|
|
void reader_data_t::sanity_check() const {
|
|
if (command_line.position() > command_line.size()) sanity_lose();
|
|
if (colors.size() != command_line.size()) sanity_lose();
|
|
if (indents.size() != command_line.size()) sanity_lose();
|
|
}
|
|
|
|
/// Set the specified string as the current buffer.
|
|
void reader_data_t::set_command_line_and_position(editable_line_t *el, wcstring &&new_str,
|
|
size_t pos) {
|
|
el->push_edit(edit_t(0, el->size(), std::move(new_str)));
|
|
el->set_position(pos);
|
|
el->undo_history.may_coalesce = false;
|
|
update_buff_pos(el, pos);
|
|
command_line_changed(el);
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
}
|
|
|
|
/// Undo the transient edit und update commandline accordingly.
|
|
void reader_data_t::clear_transient_edit() {
|
|
if (!command_line_has_transient_edit) {
|
|
return;
|
|
}
|
|
command_line.undo();
|
|
update_buff_pos(&command_line);
|
|
command_line_changed(&command_line);
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
command_line_has_transient_edit = false;
|
|
}
|
|
|
|
void reader_data_t::replace_current_token(wcstring &&new_token) {
|
|
const wchar_t *begin, *end;
|
|
|
|
// Find current token.
|
|
editable_line_t *el = active_edit_line();
|
|
const wchar_t *buff = el->text().c_str();
|
|
parse_util_token_extent(buff, el->position(), &begin, &end, nullptr, nullptr);
|
|
|
|
if (!begin || !end) return;
|
|
|
|
size_t offset = begin - buff;
|
|
size_t length = end - begin;
|
|
el->replace_substring(offset, length, std::move(new_token));
|
|
}
|
|
|
|
/// Apply the history search to the command line.
|
|
void reader_data_t::update_command_line_from_history_search() {
|
|
wcstring new_text = history_search.is_at_end() ? history_search.search_string()
|
|
: history_search.current_result();
|
|
editable_line_t *el = active_edit_line();
|
|
if (command_line_has_transient_edit) {
|
|
el->undo();
|
|
}
|
|
if (history_search.by_token()) {
|
|
replace_current_token(std::move(new_text));
|
|
} else {
|
|
assert(history_search.by_line() || history_search.by_prefix());
|
|
el->replace_substring(0, el->size(), std::move(new_text));
|
|
}
|
|
command_line_has_transient_edit = true;
|
|
assert(el == &command_line);
|
|
update_buff_pos(el);
|
|
command_line_changed(el);
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
}
|
|
|
|
enum move_word_dir_t { MOVE_DIR_LEFT, MOVE_DIR_RIGHT };
|
|
|
|
/// Move buffer position one word or erase one word. This function updates both the internal buffer
|
|
/// and the screen. It is used by M-left, M-right and ^W to do block movement or block erase.
|
|
///
|
|
/// \param move_right true if moving right
|
|
/// \param erase Whether to erase the characters along the way or only move past them.
|
|
/// \param newv if the new kill item should be appended to the previous kill item or not.
|
|
void reader_data_t::move_word(editable_line_t *el, bool move_right, bool erase,
|
|
enum move_word_style_t style, bool newv) {
|
|
// Return if we are already at the edge.
|
|
const size_t boundary = move_right ? el->size() : 0;
|
|
if (el->position() == boundary) return;
|
|
|
|
// When moving left, a value of 1 means the character at index 0.
|
|
move_word_state_machine_t state(style);
|
|
const wchar_t *const command_line = el->text().c_str();
|
|
const size_t start_buff_pos = el->position();
|
|
|
|
size_t buff_pos = el->position();
|
|
while (buff_pos != boundary) {
|
|
size_t idx = (move_right ? buff_pos : buff_pos - 1);
|
|
wchar_t c = command_line[idx];
|
|
if (!state.consume_char(c)) break;
|
|
buff_pos = (move_right ? buff_pos + 1 : buff_pos - 1);
|
|
}
|
|
|
|
// Always consume at least one character.
|
|
if (buff_pos == start_buff_pos) buff_pos = (move_right ? buff_pos + 1 : buff_pos - 1);
|
|
|
|
// If we are moving left, buff_pos-1 is the index of the first character we do not delete
|
|
// (possibly -1). If we are moving right, then buff_pos is that index - possibly el->size().
|
|
if (erase) {
|
|
// Don't autosuggest after a kill.
|
|
if (el == &this->command_line) {
|
|
suppress_autosuggestion = true;
|
|
}
|
|
|
|
if (move_right) {
|
|
kill(el, start_buff_pos, buff_pos - start_buff_pos, KILL_APPEND, newv);
|
|
} else {
|
|
kill(el, buff_pos, start_buff_pos - buff_pos, KILL_PREPEND, newv);
|
|
}
|
|
} else {
|
|
update_buff_pos(el, buff_pos);
|
|
repaint();
|
|
}
|
|
}
|
|
|
|
/// Sets the command line contents, without clearing the pager.
|
|
void reader_data_t::set_buffer_maintaining_pager(const wcstring &b, size_t pos, bool transient) {
|
|
// Callers like to pass us pointers into ourselves, so be careful! I don't know if we can use
|
|
// operator= with a pointer to our interior, so use an intermediate.
|
|
size_t command_line_len = b.size();
|
|
if (transient) {
|
|
if (command_line_has_transient_edit) {
|
|
command_line.undo();
|
|
}
|
|
command_line_has_transient_edit = true;
|
|
}
|
|
command_line.replace_substring(0, command_line.size(), wcstring(b));
|
|
command_line_changed(&command_line);
|
|
|
|
// Don't set a position past the command line length.
|
|
if (pos > command_line_len) pos = command_line_len; //!OCLINT(parameter reassignment)
|
|
|
|
update_buff_pos(&command_line, pos);
|
|
|
|
// Clear history search and pager contents.
|
|
history_search.reset();
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
}
|
|
|
|
void set_env_cmd_duration(struct timeval *after, struct timeval *before, env_stack_t &vars) {
|
|
time_t secs = after->tv_sec - before->tv_sec;
|
|
suseconds_t usecs = after->tv_usec - before->tv_usec;
|
|
|
|
if (after->tv_usec < before->tv_usec) {
|
|
usecs += 1000000;
|
|
secs -= 1;
|
|
}
|
|
|
|
vars.set_one(ENV_CMD_DURATION, ENV_UNEXPORT, std::to_wstring((secs * 1000) + (usecs / 1000)));
|
|
}
|
|
|
|
void reader_run_command(parser_t &parser, const wcstring &cmd) {
|
|
struct timeval time_before, time_after;
|
|
|
|
wcstring ft = tok_command(cmd);
|
|
|
|
// For compatibility with fish 2.0's $_, now replaced with `status current-command`
|
|
if (!ft.empty()) parser.vars().set_one(L"_", ENV_GLOBAL, ft);
|
|
|
|
outputter_t &outp = outputter_t::stdoutput();
|
|
reader_write_title(cmd, parser);
|
|
term_donate(outp);
|
|
|
|
gettimeofday(&time_before, nullptr);
|
|
|
|
parser.eval(cmd, io_chain_t{});
|
|
job_reap(parser, true);
|
|
|
|
gettimeofday(&time_after, nullptr);
|
|
|
|
// update the execution duration iff a command is requested for execution
|
|
// issue - #4926
|
|
if (!ft.empty()) set_env_cmd_duration(&time_after, &time_before, parser.vars());
|
|
|
|
term_steal();
|
|
|
|
// For compatibility with fish 2.0's $_, now replaced with `status current-command`
|
|
parser.vars().set_one(L"_", ENV_GLOBAL, program_name);
|
|
|
|
if (have_proc_stat()) {
|
|
proc_update_jiffies(parser);
|
|
}
|
|
}
|
|
|
|
parser_test_error_bits_t reader_shell_test(parser_t &parser, const wcstring &b) {
|
|
wcstring bstr = b;
|
|
|
|
// Append a newline, to act as a statement terminator.
|
|
bstr.push_back(L'\n');
|
|
|
|
parse_error_list_t errors;
|
|
parser_test_error_bits_t res =
|
|
parse_util_detect_errors(bstr, &errors, true /* do accept incomplete */);
|
|
|
|
if (res & PARSER_TEST_ERROR) {
|
|
wcstring error_desc;
|
|
parser.get_backtrace(bstr, errors, error_desc);
|
|
|
|
// Ensure we end with a newline. Also add an initial newline, because it's likely the user
|
|
// just hit enter and so there's junk on the current line.
|
|
if (!string_suffixes_string(L"\n", error_desc)) {
|
|
error_desc.push_back(L'\n');
|
|
}
|
|
std::fwprintf(stderr, L"\n%ls", error_desc.c_str());
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/// Called to set the highlight flag for search results.
|
|
void reader_data_t::highlight_search() {
|
|
if (history_search.is_at_end()) {
|
|
return;
|
|
}
|
|
const wcstring &needle = history_search.search_string();
|
|
const editable_line_t *el = &command_line;
|
|
size_t match_pos = el->text().find(needle);
|
|
if (match_pos != wcstring::npos) {
|
|
size_t end = match_pos + needle.size();
|
|
for (size_t i = match_pos; i < end; i++) {
|
|
colors.at(i).background = highlight_role_t::search_match;
|
|
}
|
|
}
|
|
}
|
|
|
|
void reader_data_t::highlight_complete(highlight_result_t result) {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
if (result.text == command_line.text()) {
|
|
// The data hasn't changed, so swap in our colors. The colors may not have changed, so do
|
|
// nothing if they have not.
|
|
assert(result.colors.size() == command_line.size());
|
|
if (colors != result.colors) {
|
|
colors = std::move(result.colors);
|
|
sanity_check();
|
|
highlight_search();
|
|
repaint();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Given text, bracket matching position, and whether IO is allowed,
|
|
// return a function that performs highlighting. The function may be invoked on a background thread.
|
|
static std::function<highlight_result_t(void)> get_highlight_performer(
|
|
parser_t &parser, const wcstring &text, long match_highlight_pos,
|
|
highlight_function_t highlight_func) {
|
|
auto vars = parser.vars().snapshot();
|
|
unsigned generation_count = read_generation_count();
|
|
return [=]() -> highlight_result_t {
|
|
if (text.empty()) return {};
|
|
operation_context_t ctx = get_bg_context(vars, generation_count);
|
|
std::vector<highlight_spec_t> colors(text.size(), highlight_spec_t{});
|
|
highlight_func(text, colors, match_highlight_pos, ctx);
|
|
return {std::move(colors), text};
|
|
};
|
|
}
|
|
|
|
/// Call specified external highlighting function and then do search highlighting. Lastly, clear the
|
|
/// background color under the cursor to avoid repaint issues on terminals where e.g. syntax
|
|
/// highlighting maykes characters under the sursor unreadable.
|
|
///
|
|
/// \param match_highlight_pos_adjust the adjustment to the position to use for bracket matching.
|
|
/// This is added to the current cursor position and may be negative.
|
|
/// \param no_io if true, do a highlight that does not perform I/O, synchronously. If false, perform
|
|
/// an asynchronous highlight in the background, which may perform disk I/O.
|
|
void reader_data_t::super_highlight_me_plenty(int match_highlight_pos_adjust, bool no_io) {
|
|
const editable_line_t *el = &command_line;
|
|
assert(el != nullptr);
|
|
long match_highlight_pos = static_cast<long>(el->position()) + match_highlight_pos_adjust;
|
|
assert(match_highlight_pos >= 0);
|
|
|
|
sanity_check();
|
|
|
|
auto highlight_performer = get_highlight_performer(
|
|
parser(), el->text(), match_highlight_pos, no_io ? highlight_shell_no_io : highlight_func);
|
|
if (no_io) {
|
|
// Highlighting without IO, we just do it.
|
|
highlight_complete(highlight_performer());
|
|
} else {
|
|
// Highlighting including I/O proceeds in the background.
|
|
auto shared_this = this->shared_from_this();
|
|
debounce_highlighting().perform(highlight_performer,
|
|
[shared_this](highlight_result_t result) {
|
|
shared_this->highlight_complete(std::move(result));
|
|
});
|
|
}
|
|
highlight_search();
|
|
|
|
// Here's a hack. Check to see if our autosuggestion still applies; if so, don't recompute it.
|
|
// Since the autosuggestion computation is asynchronous, this avoids "flashing" as you type into
|
|
// the autosuggestion.
|
|
const wcstring &cmd = el->text(), &suggest = autosuggestion;
|
|
if (can_autosuggest() && !suggest.empty() &&
|
|
string_prefixes_string_case_insensitive(cmd, suggest)) {
|
|
// the autosuggestion is still reasonable, so do nothing
|
|
} else {
|
|
update_autosuggestion();
|
|
}
|
|
}
|
|
|
|
/// The stack of current interactive reading contexts.
|
|
static std::vector<std::shared_ptr<reader_data_t>> reader_data_stack;
|
|
|
|
/// Access the top level reader data.
|
|
static reader_data_t *current_data_or_null() {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
return reader_data_stack.empty() ? nullptr : reader_data_stack.back().get();
|
|
}
|
|
|
|
static reader_data_t *current_data() {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
assert(!reader_data_stack.empty() && "no current reader");
|
|
return reader_data_stack.back().get();
|
|
}
|
|
|
|
void reader_change_history(const wcstring &name) {
|
|
// We don't need to _change_ if we're not initialized yet.
|
|
reader_data_t *data = current_data_or_null();
|
|
if (data && data->history) {
|
|
data->history->save();
|
|
data->history = &history_t::history_with_name(name);
|
|
}
|
|
}
|
|
|
|
void reader_push(parser_t &parser, const wcstring &name) {
|
|
history_t *hist = &history_t::history_with_name(name);
|
|
reader_data_stack.push_back(std::make_shared<reader_data_t>(parser.shared(), hist));
|
|
reader_data_t *data = current_data();
|
|
data->command_line_changed(&data->command_line);
|
|
if (reader_data_stack.size() == 1) {
|
|
reader_interactive_init(parser);
|
|
}
|
|
|
|
data->exec_prompt();
|
|
}
|
|
|
|
void reader_pop() {
|
|
assert(!reader_data_stack.empty() && "empty stack in reader_data_stack");
|
|
reader_data_stack.pop_back();
|
|
reader_data_t *new_reader = current_data_or_null();
|
|
if (new_reader == nullptr) {
|
|
reader_interactive_destroy();
|
|
} else {
|
|
s_end_current_loop = false;
|
|
s_reset_abandoning_line(&new_reader->screen, termsize_last().width);
|
|
}
|
|
}
|
|
|
|
void reader_set_left_prompt(const wcstring &new_prompt) {
|
|
current_data()->left_prompt = new_prompt;
|
|
}
|
|
|
|
void reader_set_right_prompt(const wcstring &new_prompt) {
|
|
current_data()->right_prompt = new_prompt;
|
|
}
|
|
|
|
void reader_set_allow_autosuggesting(bool flag) { current_data()->allow_autosuggestion = flag; }
|
|
|
|
void reader_set_expand_abbreviations(bool flag) { current_data()->expand_abbreviations = flag; }
|
|
|
|
void reader_set_complete_ok(bool flag) { current_data()->complete_ok = flag; }
|
|
|
|
void reader_set_highlight_function(highlight_function_t func) {
|
|
current_data()->highlight_func = func;
|
|
}
|
|
|
|
void reader_set_test_function(test_function_t f) { current_data()->test_func = f; }
|
|
|
|
void reader_set_exit_on_interrupt(bool i) { current_data()->exit_on_interrupt = i; }
|
|
|
|
void reader_set_silent_status(bool flag) { current_data()->silent = flag; }
|
|
|
|
void reader_import_history_if_necessary() {
|
|
// Import history from older location (config path) if our current history is empty.
|
|
reader_data_t *data = current_data();
|
|
if (data->history && data->history->is_empty()) {
|
|
data->history->populate_from_config_path();
|
|
}
|
|
|
|
// Import history from bash, etc. if our current history is still empty and is the default
|
|
// history.
|
|
if (data->history && data->history->is_empty() && data->history->is_default()) {
|
|
// Try opening a bash file. We make an effort to respect $HISTFILE; this isn't very complete
|
|
// (AFAIK it doesn't have to be exported), and to really get this right we ought to ask bash
|
|
// itself. But this is better than nothing.
|
|
const auto var = data->vars().get(L"HISTFILE");
|
|
wcstring path = (var ? var->as_string() : L"~/.bash_history");
|
|
expand_tilde(path, data->vars());
|
|
int fd = wopen_cloexec(path, O_RDONLY);
|
|
if (fd >= 0) {
|
|
FILE *f = fdopen(fd, "r");
|
|
data->history->populate_from_bash(f);
|
|
fclose(f);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool shell_is_exiting() { return should_exit(); }
|
|
|
|
void reader_bg_job_warning(const job_list_t &jobs) {
|
|
std::fputws(_(L"There are still jobs active:\n"), stdout);
|
|
std::fputws(_(L"\n PID Command\n"), stdout);
|
|
|
|
for (const auto &j : jobs) {
|
|
std::fwprintf(stdout, L"%6d %ls\n", j->processes[0]->pid, j->command_wcstr());
|
|
}
|
|
fputws(L"\n", stdout);
|
|
fputws(_(L"A second attempt to exit will terminate them.\n"), stdout);
|
|
fputws(_(L"Use 'disown PID' to remove jobs from the list without terminating them.\n"), stdout);
|
|
}
|
|
|
|
/// This function is called when the main loop notices that end_loop has been set while in
|
|
/// interactive mode. It checks if it is ok to exit.
|
|
static void handle_end_loop(parser_t &parser) {
|
|
if (!reader_exit_forced()) {
|
|
for (const auto &b : parser.blocks()) {
|
|
if (b.type() == block_type_t::breakpoint) {
|
|
// We're executing within a breakpoint so we do not want to terminate the shell and
|
|
// kill background jobs.
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Perhaps print a warning before exiting.
|
|
reader_data_t *data = current_data();
|
|
auto bg_jobs = jobs_requiring_warning_on_exit(parser);
|
|
if (!data->prev_end_loop && !bg_jobs.empty()) {
|
|
print_exit_warning_for_jobs(bg_jobs);
|
|
reader_set_end_loop(false);
|
|
data->prev_end_loop = true;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Kill remaining jobs before exiting.
|
|
hup_jobs(parser.jobs());
|
|
}
|
|
|
|
static bool selection_is_at_top() {
|
|
reader_data_t *data = current_data();
|
|
const pager_t *pager = &data->pager;
|
|
size_t row = pager->get_selected_row(data->current_page_rendering);
|
|
if (row != 0 && row != PAGER_SELECTION_NONE) return false;
|
|
|
|
size_t col = pager->get_selected_column(data->current_page_rendering);
|
|
return !(col != 0 && col != PAGER_SELECTION_NONE);
|
|
}
|
|
|
|
static relaxed_atomic_t<uint64_t> run_count{0};
|
|
|
|
/// Returns the current interactive loop count
|
|
uint64_t reader_run_count() { return run_count; }
|
|
|
|
/// Read interactively. Read input from stdin while providing editing facilities.
|
|
static int read_i(parser_t &parser) {
|
|
reader_push(parser, history_session_id(parser.vars()));
|
|
reader_set_complete_ok(true);
|
|
reader_set_highlight_function(&highlight_shell);
|
|
reader_set_test_function(&reader_shell_test);
|
|
reader_set_allow_autosuggesting(true);
|
|
reader_set_expand_abbreviations(true);
|
|
reader_import_history_if_necessary();
|
|
|
|
reader_data_t *data = current_data();
|
|
data->prev_end_loop = false;
|
|
|
|
while (!shell_is_exiting()) {
|
|
run_count++;
|
|
|
|
if (parser.libdata().is_breakpoint && function_exists(DEBUG_PROMPT_FUNCTION_NAME, parser)) {
|
|
reader_set_left_prompt(DEBUG_PROMPT_FUNCTION_NAME);
|
|
} else if (function_exists(LEFT_PROMPT_FUNCTION_NAME, parser)) {
|
|
reader_set_left_prompt(LEFT_PROMPT_FUNCTION_NAME);
|
|
} else {
|
|
reader_set_left_prompt(DEFAULT_PROMPT);
|
|
}
|
|
|
|
if (function_exists(RIGHT_PROMPT_FUNCTION_NAME, parser)) {
|
|
reader_set_right_prompt(RIGHT_PROMPT_FUNCTION_NAME);
|
|
} else {
|
|
reader_set_right_prompt(L"");
|
|
}
|
|
|
|
// Put buff in temporary string and clear buff, so that we can handle a call to
|
|
// reader_set_buffer during evaluation.
|
|
maybe_t<wcstring> tmp = reader_readline(0);
|
|
|
|
if (should_exit(&parser)) {
|
|
handle_end_loop(parser);
|
|
} else if (tmp && !tmp->empty()) {
|
|
const wcstring command = tmp.acquire();
|
|
data->update_buff_pos(&data->command_line, 0);
|
|
data->command_line.clear();
|
|
data->command_line_changed(&data->command_line);
|
|
wcstring_list_t argv(1, command);
|
|
event_fire_generic(parser, L"fish_preexec", &argv);
|
|
reader_run_command(parser, command);
|
|
signal_clear_cancel();
|
|
event_fire_generic(parser, L"fish_postexec", &argv);
|
|
// Allow any pending history items to be returned in the history array.
|
|
if (data->history) {
|
|
data->history->resolve_pending();
|
|
}
|
|
if (should_exit(&parser)) {
|
|
handle_end_loop(parser);
|
|
} else {
|
|
data->prev_end_loop = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
reader_pop();
|
|
return 0;
|
|
}
|
|
|
|
/// Test if there are bytes available for reading on the specified file descriptor.
|
|
static int can_read(int fd) {
|
|
struct timeval can_read_timeout = {0, 0};
|
|
fd_set fds;
|
|
|
|
FD_ZERO(&fds);
|
|
FD_SET(fd, &fds);
|
|
return select(fd + 1, &fds, nullptr, nullptr, &can_read_timeout) == 1;
|
|
}
|
|
|
|
/// Test if the specified character in the specified string is backslashed. pos may be at the end of
|
|
/// the string, which indicates if there is a trailing backslash.
|
|
static bool is_backslashed(const wcstring &str, size_t pos) {
|
|
// note pos == str.size() is OK.
|
|
if (pos > str.size()) return false;
|
|
|
|
size_t count = 0, idx = pos;
|
|
while (idx--) {
|
|
if (str.at(idx) != L'\\') break;
|
|
count++;
|
|
}
|
|
|
|
return (count % 2) == 1;
|
|
}
|
|
|
|
static wchar_t unescaped_quote(const wcstring &str, size_t pos) {
|
|
wchar_t result = L'\0';
|
|
if (pos < str.size()) {
|
|
wchar_t c = str.at(pos);
|
|
if ((c == L'\'' || c == L'"') && !is_backslashed(str, pos)) {
|
|
result = c;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// Returns true if the last token is a comment.
|
|
static bool text_ends_in_comment(const wcstring &text) {
|
|
tokenizer_t tok(text.c_str(), TOK_ACCEPT_UNFINISHED | TOK_SHOW_COMMENTS);
|
|
bool is_comment = false;
|
|
while (auto token = tok.next()) {
|
|
is_comment = token->type == token_type_t::comment;
|
|
}
|
|
return is_comment;
|
|
}
|
|
|
|
/// \return true if an event is a normal character that should be inserted into the buffer.
|
|
static bool event_is_normal_char(const char_event_t &evt) {
|
|
if (!evt.is_char()) return false;
|
|
auto c = evt.get_char();
|
|
return !fish_reserved_codepoint(c) && c > 31 && c != 127;
|
|
}
|
|
|
|
/// readline_loop_state_t encapsulates the state used in a readline loop.
|
|
/// It is always stack allocated transient. This state should not be "publicly visible"; public
|
|
/// state should be in reader_data_t.
|
|
struct readline_loop_state_t {
|
|
/// The last command that was executed.
|
|
maybe_t<readline_cmd_t> last_cmd{};
|
|
|
|
/// If the last command was a yank, the length of yanking that occurred.
|
|
size_t yank_len{0};
|
|
|
|
/// If the last "complete" readline command has inserted text into the command line.
|
|
bool complete_did_insert{true};
|
|
|
|
/// List of completions.
|
|
completion_list_t comp;
|
|
|
|
/// Whether we are skipping redundant repaints.
|
|
bool coalescing_repaints = false;
|
|
|
|
/// Whether the loop has finished, due to reaching the character limit or through executing a
|
|
/// command.
|
|
bool finished{false};
|
|
|
|
/// Maximum number of characters to read.
|
|
size_t nchars{std::numeric_limits<size_t>::max()};
|
|
};
|
|
|
|
/// Read normal characters, inserting them into the command line.
|
|
/// \return the next unhandled event.
|
|
maybe_t<char_event_t> reader_data_t::read_normal_chars(readline_loop_state_t &rls) {
|
|
maybe_t<char_event_t> event_needing_handling{};
|
|
wcstring accumulated_chars;
|
|
size_t limit = std::min(rls.nchars - command_line.size(), READAHEAD_MAX);
|
|
while (accumulated_chars.size() < limit) {
|
|
bool allow_commands = (accumulated_chars.empty());
|
|
auto evt = inputter.readch(allow_commands);
|
|
if (!event_is_normal_char(evt) || !can_read(STDIN_FILENO)) {
|
|
event_needing_handling = std::move(evt);
|
|
break;
|
|
} else if (evt.input_style == char_input_style_t::notfirst && accumulated_chars.empty() &&
|
|
active_edit_line()->position() == 0) {
|
|
// The cursor is at the beginning and nothing is accumulated, so skip this character.
|
|
continue;
|
|
} else {
|
|
accumulated_chars.push_back(evt.get_char());
|
|
}
|
|
}
|
|
|
|
if (!accumulated_chars.empty()) {
|
|
editable_line_t *el = active_edit_line();
|
|
insert_string(el, accumulated_chars);
|
|
|
|
// End paging upon inserting into the normal command line.
|
|
if (el == &command_line) {
|
|
clear_pager();
|
|
}
|
|
|
|
// Since we handled a normal character, we don't have a last command.
|
|
rls.last_cmd.reset();
|
|
}
|
|
return event_needing_handling;
|
|
}
|
|
|
|
/// Handle a readline command \p c, updating the state \p rls.
|
|
void reader_data_t::handle_readline_command(readline_cmd_t c, readline_loop_state_t &rls) {
|
|
const auto &vars = this->vars();
|
|
using rl = readline_cmd_t;
|
|
switch (c) {
|
|
// Go to beginning of line.
|
|
case rl::beginning_of_line: {
|
|
editable_line_t *el = active_edit_line();
|
|
while (el->position() > 0 && el->text().at(el->position() - 1) != L'\n') {
|
|
update_buff_pos(el, el->position() - 1);
|
|
}
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::end_of_line: {
|
|
editable_line_t *el = active_edit_line();
|
|
if (el->position() < el->size()) {
|
|
const wchar_t *buff = el->text().c_str();
|
|
while (buff[el->position()] && buff[el->position()] != L'\n') {
|
|
update_buff_pos(el, el->position() + 1);
|
|
}
|
|
} else {
|
|
accept_autosuggestion(true);
|
|
}
|
|
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::beginning_of_buffer: {
|
|
update_buff_pos(&command_line, 0);
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::end_of_buffer: {
|
|
update_buff_pos(&command_line, command_line.size());
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::cancel_commandline: {
|
|
if (command_line.size()) {
|
|
outputter_t &outp = outputter_t::stdoutput();
|
|
// Move cursor to the end of the line.
|
|
update_buff_pos(&command_line, command_line.size());
|
|
autosuggestion.clear();
|
|
// Repaint also changes the actual cursor position
|
|
repaint();
|
|
|
|
auto fish_color_cancel = vars.get(L"fish_color_cancel");
|
|
if (fish_color_cancel) {
|
|
outp.set_color(parse_color(*fish_color_cancel, false),
|
|
parse_color(*fish_color_cancel, true));
|
|
}
|
|
outp.writestr(L"^C");
|
|
outp.set_color(rgb_color_t::reset(), rgb_color_t::reset());
|
|
|
|
// We print a newline last so the prompt_sp hack doesn't get us.
|
|
outp.push_back('\n');
|
|
|
|
set_command_line_and_position(&command_line, L"", 0);
|
|
s_reset_abandoning_line(&screen, termsize_last().width - command_line.size());
|
|
}
|
|
break;
|
|
}
|
|
case rl::cancel: {
|
|
// The only thing we can cancel right now is paging, which we handled up above.
|
|
break;
|
|
}
|
|
case rl::repaint_mode: {
|
|
// Repaint the mode-prompt only if possible.
|
|
// This is an optimization basically exclusively for vi-mode, since the prompt
|
|
// may sometimes take a while but when switching the mode all we care about is the
|
|
// mode-prompt.
|
|
//
|
|
// Because some users set `fish_mode_prompt` to an empty function and display the mode
|
|
// elsewhere, we detect if the mode output is empty.
|
|
exec_mode_prompt();
|
|
if (!mode_prompt_buff.empty()) {
|
|
s_reset_line(&screen, true /* redraw prompt */);
|
|
screen_reset_needed = false;
|
|
repaint();
|
|
break;
|
|
}
|
|
// Else we repaint as normal.
|
|
/* fallthrough */
|
|
}
|
|
case rl::force_repaint:
|
|
case rl::repaint: {
|
|
if (!rls.coalescing_repaints) {
|
|
rls.coalescing_repaints = true;
|
|
exec_prompt();
|
|
s_reset_line(&screen, true /* redraw prompt */);
|
|
screen_reset_needed = false;
|
|
repaint();
|
|
}
|
|
break;
|
|
}
|
|
case rl::complete:
|
|
case rl::complete_and_search: {
|
|
if (!complete_ok) break;
|
|
|
|
// Use the command line only; it doesn't make sense to complete in any other line.
|
|
editable_line_t *el = &command_line;
|
|
if (is_navigating_pager_contents() ||
|
|
(!rls.complete_did_insert && rls.last_cmd == rl::complete)) {
|
|
// The user typed complete more than once in a row. If we are not yet fully
|
|
// disclosed, then become so; otherwise cycle through our available completions.
|
|
if (current_page_rendering.remaining_to_disclose > 0) {
|
|
pager.set_fully_disclosed(true);
|
|
mark_repaint_needed();
|
|
} else {
|
|
select_completion_in_direction(c == rl::complete ? selection_motion_t::next
|
|
: selection_motion_t::prev);
|
|
}
|
|
} else {
|
|
// Either the user hit tab only once, or we had no visible completion list.
|
|
// Remove a trailing backslash. This may trigger an extra repaint, but this is
|
|
// rare.
|
|
if (is_backslashed(el->text(), el->position())) {
|
|
delete_char();
|
|
}
|
|
|
|
// Get the string; we have to do this after removing any trailing backslash.
|
|
const wchar_t *const buff = el->text().c_str();
|
|
|
|
// Figure out the extent of the command substitution surrounding the cursor.
|
|
// This is because we only look at the current command substitution to form
|
|
// completions - stuff happening outside of it is not interesting.
|
|
const wchar_t *cmdsub_begin, *cmdsub_end;
|
|
parse_util_cmdsubst_extent(buff, el->position(), &cmdsub_begin, &cmdsub_end);
|
|
|
|
// Figure out the extent of the token within the command substitution. Note we
|
|
// pass cmdsub_begin here, not buff.
|
|
const wchar_t *token_begin, *token_end;
|
|
parse_util_token_extent(cmdsub_begin, el->position() - (cmdsub_begin - buff),
|
|
&token_begin, &token_end, nullptr, nullptr);
|
|
|
|
// Hack: the token may extend past the end of the command substitution, e.g. in
|
|
// (echo foo) the last token is 'foo)'. Don't let that happen.
|
|
if (token_end > cmdsub_end) token_end = cmdsub_end;
|
|
|
|
// Construct a copy of the string from the beginning of the command substitution
|
|
// up to the end of the token we're completing.
|
|
const wcstring buffcpy = wcstring(cmdsub_begin, token_end);
|
|
|
|
// std::fwprintf(stderr, L"Complete (%ls)\n", buffcpy.c_str());
|
|
completion_request_flags_t complete_flags = {completion_request_t::descriptions,
|
|
completion_request_t::fuzzy_match};
|
|
rls.comp = complete(buffcpy, complete_flags, parser_ref->context());
|
|
|
|
// User-supplied completions may have changed the commandline - prevent buffer
|
|
// overflow.
|
|
if (token_begin > buff + el->text().size()) token_begin = buff + el->text().size();
|
|
if (token_end > buff + el->text().size()) token_end = buff + el->text().size();
|
|
|
|
// Munge our completions.
|
|
completions_sort_and_prioritize(&rls.comp);
|
|
|
|
// Record our cycle_command_line.
|
|
cycle_command_line = el->text();
|
|
cycle_cursor_pos = token_end - buff;
|
|
|
|
rls.complete_did_insert =
|
|
handle_completions(rls.comp, token_begin - buff, token_end - buff);
|
|
|
|
// Show the search field if requested and if we printed a list of completions.
|
|
if (c == rl::complete_and_search && !rls.complete_did_insert && !pager.empty()) {
|
|
pager.set_search_field_shown(true);
|
|
select_completion_in_direction(selection_motion_t::next);
|
|
mark_repaint_needed();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case rl::pager_toggle_search: {
|
|
if (!pager.empty()) {
|
|
// Toggle search, and begin navigating if we are now searching.
|
|
bool sfs = pager.is_search_field_shown();
|
|
pager.set_search_field_shown(!sfs);
|
|
pager.set_fully_disclosed(true);
|
|
if (pager.is_search_field_shown() && !is_navigating_pager_contents()) {
|
|
select_completion_in_direction(selection_motion_t::south);
|
|
}
|
|
mark_repaint_needed();
|
|
}
|
|
break;
|
|
}
|
|
case rl::kill_line: {
|
|
editable_line_t *el = active_edit_line();
|
|
const wchar_t *buff = el->text().c_str();
|
|
const wchar_t *begin = &buff[el->position()];
|
|
const wchar_t *end = begin;
|
|
|
|
while (*end && *end != L'\n') end++;
|
|
|
|
if (end == begin && *end) end++;
|
|
|
|
size_t len = end - begin;
|
|
if (len) {
|
|
kill(el, begin - buff, len, KILL_APPEND, rls.last_cmd != rl::kill_line);
|
|
}
|
|
break;
|
|
}
|
|
case rl::backward_kill_line: {
|
|
editable_line_t *el = active_edit_line();
|
|
if (el->position() <= 0) {
|
|
break;
|
|
}
|
|
const wchar_t *buff = el->text().c_str();
|
|
const wchar_t *end = &buff[el->position()];
|
|
const wchar_t *begin = end;
|
|
|
|
begin--; // make sure we delete at least one character (see issue #580)
|
|
|
|
// Delete until we hit a newline, or the beginning of the string.
|
|
while (begin > buff && *begin != L'\n') begin--;
|
|
|
|
// If we landed on a newline, don't delete it.
|
|
if (*begin == L'\n') begin++;
|
|
assert(end >= begin);
|
|
size_t len = std::max<size_t>(end - begin, 1);
|
|
begin = end - len;
|
|
kill(el, begin - buff, len, KILL_PREPEND, rls.last_cmd != rl::backward_kill_line);
|
|
break;
|
|
}
|
|
case rl::kill_whole_line: {
|
|
// We match the emacs behavior here: "kills the entire line including the following
|
|
// newline".
|
|
editable_line_t *el = active_edit_line();
|
|
const wchar_t *buff = el->text().c_str();
|
|
|
|
// Back up to the character just past the previous newline, or go to the beginning
|
|
// of the command line. Note that if the position is on a newline, visually this
|
|
// looks like the cursor is at the end of a line. Therefore that newline is NOT the
|
|
// beginning of a line; this justifies the -1 check.
|
|
size_t begin = el->position();
|
|
while (begin > 0 && buff[begin - 1] != L'\n') {
|
|
begin--;
|
|
}
|
|
|
|
// Push end forwards to just past the next newline, or just past the last char.
|
|
size_t end = el->position();
|
|
while (buff[end] != L'\0') {
|
|
end++;
|
|
if (buff[end - 1] == L'\n') {
|
|
break;
|
|
}
|
|
}
|
|
assert(end >= begin);
|
|
|
|
if (end > begin) {
|
|
kill(el, begin, end - begin, KILL_APPEND, rls.last_cmd != rl::kill_whole_line);
|
|
}
|
|
break;
|
|
}
|
|
case rl::yank: {
|
|
wcstring yank_str = kill_yank();
|
|
insert_string(active_edit_line(), yank_str);
|
|
rls.yank_len = yank_str.size();
|
|
break;
|
|
}
|
|
case rl::yank_pop: {
|
|
if (rls.yank_len) {
|
|
editable_line_t *el = active_edit_line();
|
|
wcstring yank_str = kill_yank_rotate();
|
|
size_t new_yank_len = yank_str.size();
|
|
el->replace_substring(el->position() - rls.yank_len, rls.yank_len,
|
|
std::move(yank_str));
|
|
update_buff_pos(el);
|
|
rls.yank_len = new_yank_len;
|
|
command_line_changed(el);
|
|
suppress_autosuggestion = true;
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
}
|
|
break;
|
|
}
|
|
case rl::backward_delete_char: {
|
|
delete_char();
|
|
break;
|
|
}
|
|
case rl::delete_or_exit:
|
|
case rl::delete_char: {
|
|
// Remove the current character in the character buffer and on the screen using
|
|
// syntax highlighting, etc.
|
|
editable_line_t *el = active_edit_line();
|
|
if (el->position() < el->size()) {
|
|
delete_char(false /* backward */);
|
|
} else if (c == rl::delete_or_exit && el->empty()) {
|
|
reader_set_end_loop(true);
|
|
}
|
|
break;
|
|
}
|
|
// Evaluate. If the current command is unfinished, or if the charater is escaped
|
|
// using a backslash, insert a newline.
|
|
case rl::execute: {
|
|
// If the user hits return while navigating the pager, it only clears the pager.
|
|
if (is_navigating_pager_contents()) {
|
|
clear_pager();
|
|
break;
|
|
}
|
|
|
|
// Delete any autosuggestion.
|
|
autosuggestion.clear();
|
|
|
|
// The user may have hit return with pager contents, but while not navigating them.
|
|
// Clear the pager in that event.
|
|
clear_pager();
|
|
|
|
// We only execute the command line.
|
|
editable_line_t *el = &command_line;
|
|
|
|
// Allow backslash-escaped newlines.
|
|
bool continue_on_next_line = false;
|
|
if (el->position() >= el->size()) {
|
|
// We're at the end of the text and not in a comment (issue #1225).
|
|
continue_on_next_line =
|
|
is_backslashed(el->text(), el->position()) && !text_ends_in_comment(el->text());
|
|
} else {
|
|
// Allow mid line split if the following character is whitespace (issue #613).
|
|
if (is_backslashed(el->text(), el->position()) &&
|
|
iswspace(el->text().at(el->position()))) {
|
|
continue_on_next_line = true;
|
|
// Check if the end of the line is backslashed (issue #4467).
|
|
} else if (is_backslashed(el->text(), el->size()) &&
|
|
!text_ends_in_comment(el->text())) {
|
|
// Move the cursor to the end of the line.
|
|
el->set_position(el->size());
|
|
continue_on_next_line = true;
|
|
}
|
|
}
|
|
// If the conditions are met, insert a new line at the position of the cursor.
|
|
if (continue_on_next_line) {
|
|
insert_char(el, L'\n');
|
|
break;
|
|
}
|
|
|
|
// See if this command is valid.
|
|
int command_test_result = test_func(parser(), el->text());
|
|
if (command_test_result == 0 || command_test_result == PARSER_TEST_INCOMPLETE) {
|
|
// This command is valid, but an abbreviation may make it invalid. If so, we
|
|
// will have to test again.
|
|
bool abbreviation_expanded = expand_abbreviation_as_necessary(1);
|
|
if (abbreviation_expanded) {
|
|
// It's our reponsibility to rehighlight and repaint. But everything we do
|
|
// below triggers a repaint.
|
|
command_test_result = test_func(parser(), el->text());
|
|
|
|
// If the command is OK, then we're going to execute it. We still want to do
|
|
// syntax highlighting, but a synchronous variant that performs no I/O, so
|
|
// as not to block the user.
|
|
bool skip_io = (command_test_result == 0);
|
|
super_highlight_me_plenty(0, skip_io);
|
|
}
|
|
}
|
|
|
|
if (command_test_result == 0) {
|
|
// Finished command, execute it. Don't add items that start with a leading
|
|
// space, or if in silent mode (#7230).
|
|
const editable_line_t *el = &command_line;
|
|
if (history != nullptr && !silent && may_add_to_history(el->text())) {
|
|
history->add_pending_with_file_detection(el->text(), vars.get_pwd_slash());
|
|
}
|
|
rls.finished = true;
|
|
update_buff_pos(&command_line, command_line.size());
|
|
repaint();
|
|
} else if (command_test_result == PARSER_TEST_INCOMPLETE) {
|
|
// We are incomplete, continue editing.
|
|
insert_char(el, L'\n');
|
|
} else {
|
|
// Result must be some combination including an error. The error message will
|
|
// already be printed, all we need to do is repaint.
|
|
wcstring_list_t argv(1, el->text());
|
|
event_fire_generic(parser(), L"fish_posterror", &argv);
|
|
s_reset_abandoning_line(&screen, termsize_last().width);
|
|
mark_repaint_needed();
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case rl::history_prefix_search_backward:
|
|
case rl::history_prefix_search_forward:
|
|
case rl::history_search_backward:
|
|
case rl::history_search_forward:
|
|
case rl::history_token_search_backward:
|
|
case rl::history_token_search_forward: {
|
|
reader_history_search_t::mode_t mode =
|
|
(c == rl::history_token_search_backward || c == rl::history_token_search_forward)
|
|
? reader_history_search_t::token
|
|
: (c == rl::history_prefix_search_backward ||
|
|
c == rl::history_prefix_search_forward)
|
|
? reader_history_search_t::prefix
|
|
: reader_history_search_t::line;
|
|
|
|
if (history_search.is_at_end()) {
|
|
const editable_line_t *el = &command_line;
|
|
if (mode == reader_history_search_t::token) {
|
|
// Searching by token.
|
|
const wchar_t *begin, *end;
|
|
const wchar_t *buff = el->text().c_str();
|
|
parse_util_token_extent(buff, el->position(), &begin, &end, nullptr, nullptr);
|
|
if (begin) {
|
|
wcstring token(begin, end);
|
|
history_search.reset_to_mode(token, history,
|
|
reader_history_search_t::token);
|
|
} else {
|
|
// No current token, refuse to do a token search.
|
|
history_search.reset();
|
|
}
|
|
} else {
|
|
// Searching by line.
|
|
history_search.reset_to_mode(el->text(), history, mode);
|
|
|
|
// Skip the autosuggestion in the history unless it was truncated.
|
|
const wcstring &suggest = autosuggestion;
|
|
if (!suggest.empty() && !screen.autosuggestion_is_truncated &&
|
|
mode != reader_history_search_t::prefix) {
|
|
history_search.add_skip(suggest);
|
|
}
|
|
}
|
|
}
|
|
if (history_search.active()) {
|
|
history_search_direction_t dir =
|
|
(c == rl::history_search_backward || c == rl::history_token_search_backward ||
|
|
c == rl::history_prefix_search_backward)
|
|
? history_search_direction_t::backward
|
|
: history_search_direction_t::forward;
|
|
if (history_search.move_in_direction(dir) ||
|
|
(dir == history_search_direction_t::forward && history_search.is_at_end())) {
|
|
update_command_line_from_history_search();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case rl::backward_char: {
|
|
editable_line_t *el = active_edit_line();
|
|
if (is_navigating_pager_contents()) {
|
|
select_completion_in_direction(selection_motion_t::west);
|
|
} else if (el->position() > 0) {
|
|
update_buff_pos(el, el->position() - 1);
|
|
mark_repaint_needed();
|
|
}
|
|
break;
|
|
}
|
|
case rl::forward_char: {
|
|
editable_line_t *el = active_edit_line();
|
|
if (is_navigating_pager_contents()) {
|
|
select_completion_in_direction(selection_motion_t::east);
|
|
} else if (el->position() < el->size()) {
|
|
update_buff_pos(el, el->position() + 1);
|
|
mark_repaint_needed();
|
|
} else {
|
|
accept_autosuggestion(true);
|
|
}
|
|
break;
|
|
}
|
|
case rl::forward_single_char: {
|
|
editable_line_t *el = active_edit_line();
|
|
if (is_navigating_pager_contents()) {
|
|
select_completion_in_direction(selection_motion_t::east);
|
|
} else if (el->position() < el->size()) {
|
|
update_buff_pos(el, el->position() + 1);
|
|
mark_repaint_needed();
|
|
} else {
|
|
accept_autosuggestion(false, true);
|
|
}
|
|
break;
|
|
}
|
|
case rl::backward_kill_word:
|
|
case rl::backward_kill_path_component:
|
|
case rl::backward_kill_bigword: {
|
|
move_word_style_t style =
|
|
(c == rl::backward_kill_bigword
|
|
? move_word_style_whitespace
|
|
: c == rl::backward_kill_path_component ? move_word_style_path_components
|
|
: move_word_style_punctuation);
|
|
// Is this the same killring item as the last kill?
|
|
bool newv = (rls.last_cmd != rl::backward_kill_word &&
|
|
rls.last_cmd != rl::backward_kill_path_component &&
|
|
rls.last_cmd != rl::backward_kill_bigword);
|
|
move_word(active_edit_line(), MOVE_DIR_LEFT, true /* erase */, style, newv);
|
|
break;
|
|
}
|
|
case rl::kill_word:
|
|
case rl::kill_bigword: {
|
|
// The "bigword" functions differ only in that they move to the next whitespace, not
|
|
// punctuation.
|
|
auto move_style =
|
|
(c == rl::kill_word) ? move_word_style_punctuation : move_word_style_whitespace;
|
|
move_word(active_edit_line(), MOVE_DIR_RIGHT, true /* erase */, move_style,
|
|
rls.last_cmd != c /* same kill item if same movement */);
|
|
break;
|
|
}
|
|
case rl::backward_word:
|
|
case rl::backward_bigword: {
|
|
auto move_style =
|
|
(c == rl::backward_word) ? move_word_style_punctuation : move_word_style_whitespace;
|
|
move_word(active_edit_line(), MOVE_DIR_LEFT, false /* do not erase */, move_style,
|
|
false);
|
|
break;
|
|
}
|
|
case rl::forward_word:
|
|
case rl::forward_bigword: {
|
|
auto move_style =
|
|
(c == rl::forward_word) ? move_word_style_punctuation : move_word_style_whitespace;
|
|
editable_line_t *el = active_edit_line();
|
|
if (el->position() < el->size()) {
|
|
move_word(el, MOVE_DIR_RIGHT, false /* do not erase */, move_style, false);
|
|
} else {
|
|
accept_autosuggestion(false, false, move_style);
|
|
}
|
|
break;
|
|
}
|
|
case rl::beginning_of_history:
|
|
case rl::end_of_history: {
|
|
bool up = (c == rl::beginning_of_history);
|
|
if (is_navigating_pager_contents()) {
|
|
select_completion_in_direction(up ? selection_motion_t::page_north
|
|
: selection_motion_t::page_south);
|
|
} else {
|
|
if (up) {
|
|
history_search.go_to_beginning();
|
|
} else {
|
|
history_search.go_to_end();
|
|
}
|
|
if (history_search.active()) {
|
|
update_command_line_from_history_search();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case rl::up_line:
|
|
case rl::down_line: {
|
|
if (is_navigating_pager_contents()) {
|
|
// We are already navigating pager contents.
|
|
selection_motion_t direction;
|
|
if (c == rl::down_line) {
|
|
// Down arrow is always south.
|
|
direction = selection_motion_t::south;
|
|
} else if (selection_is_at_top()) {
|
|
// Up arrow, but we are in the first column and first row. End navigation.
|
|
direction = selection_motion_t::deselect;
|
|
} else {
|
|
// Up arrow, go north.
|
|
direction = selection_motion_t::north;
|
|
}
|
|
|
|
// Now do the selection.
|
|
select_completion_in_direction(direction);
|
|
} else if (!pager.empty()) {
|
|
// We pressed a direction with a non-empty pager, begin navigation.
|
|
select_completion_in_direction(c == rl::down_line ? selection_motion_t::south
|
|
: selection_motion_t::north);
|
|
} else {
|
|
// Not navigating the pager contents.
|
|
editable_line_t *el = active_edit_line();
|
|
int line_old = parse_util_get_line_from_offset(el->text(), el->position());
|
|
int line_new;
|
|
|
|
if (c == rl::up_line)
|
|
line_new = line_old - 1;
|
|
else
|
|
line_new = line_old + 1;
|
|
|
|
int line_count = parse_util_lineno(el->text().c_str(), el->size()) - 1;
|
|
|
|
if (line_new >= 0 && line_new <= line_count) {
|
|
size_t base_pos_new;
|
|
size_t base_pos_old;
|
|
|
|
int indent_old;
|
|
int indent_new;
|
|
size_t line_offset_old;
|
|
size_t total_offset_new;
|
|
|
|
base_pos_new = parse_util_get_offset_from_line(el->text(), line_new);
|
|
|
|
base_pos_old = parse_util_get_offset_from_line(el->text(), line_old);
|
|
|
|
assert(base_pos_new != static_cast<size_t>(-1) &&
|
|
base_pos_old != static_cast<size_t>(-1));
|
|
indent_old = indents.at(base_pos_old);
|
|
indent_new = indents.at(base_pos_new);
|
|
|
|
line_offset_old =
|
|
el->position() - parse_util_get_offset_from_line(el->text(), line_old);
|
|
total_offset_new = parse_util_get_offset(
|
|
el->text(), line_new, line_offset_old - 4 * (indent_new - indent_old));
|
|
update_buff_pos(el, total_offset_new);
|
|
mark_repaint_needed();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case rl::suppress_autosuggestion: {
|
|
suppress_autosuggestion = true;
|
|
autosuggestion.clear();
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::accept_autosuggestion: {
|
|
accept_autosuggestion(true);
|
|
break;
|
|
}
|
|
case rl::transpose_chars: {
|
|
editable_line_t *el = active_edit_line();
|
|
if (el->size() < 2) {
|
|
break;
|
|
}
|
|
|
|
// If the cursor is at the end, transpose the last two characters of the line.
|
|
if (el->position() == el->size()) {
|
|
update_buff_pos(el, el->position() - 1);
|
|
}
|
|
|
|
// Drag the character before the cursor forward over the character at the cursor,
|
|
// moving the cursor forward as well.
|
|
if (el->position() > 0) {
|
|
wcstring local_cmd = el->text();
|
|
std::swap(local_cmd.at(el->position()), local_cmd.at(el->position() - 1));
|
|
set_command_line_and_position(el, std::move(local_cmd), el->position() + 1);
|
|
}
|
|
break;
|
|
}
|
|
case rl::transpose_words: {
|
|
editable_line_t *el = active_edit_line();
|
|
size_t len = el->size();
|
|
const wchar_t *buff = el->text().c_str();
|
|
const wchar_t *tok_begin, *tok_end, *prev_begin, *prev_end;
|
|
|
|
// If we are not in a token, look for one ahead.
|
|
size_t buff_pos = el->position();
|
|
while (buff_pos != len && !iswalnum(buff[buff_pos])) buff_pos++;
|
|
|
|
update_buff_pos(el, buff_pos);
|
|
|
|
parse_util_token_extent(buff, el->position(), &tok_begin, &tok_end, &prev_begin,
|
|
&prev_end);
|
|
|
|
// In case we didn't find a token at or after the cursor...
|
|
if (tok_begin == &buff[len]) {
|
|
// ...retry beginning from the previous token.
|
|
size_t pos = prev_end - &buff[0];
|
|
parse_util_token_extent(buff, pos, &tok_begin, &tok_end, &prev_begin, &prev_end);
|
|
}
|
|
|
|
// Make sure we have two tokens.
|
|
if (prev_begin < prev_end && tok_begin < tok_end && tok_begin > prev_begin) {
|
|
const wcstring prev(prev_begin, prev_end - prev_begin);
|
|
const wcstring sep(prev_end, tok_begin - prev_end);
|
|
const wcstring tok(tok_begin, tok_end - tok_begin);
|
|
const wcstring trail(tok_end, &buff[len] - tok_end);
|
|
|
|
// Compose new command line with swapped tokens.
|
|
wcstring new_buff(buff, prev_begin - buff);
|
|
new_buff.append(tok);
|
|
new_buff.append(sep);
|
|
new_buff.append(prev);
|
|
new_buff.append(trail);
|
|
// Put cursor right after the second token.
|
|
set_command_line_and_position(el, std::move(new_buff), tok_end - buff);
|
|
}
|
|
break;
|
|
}
|
|
case rl::togglecase_char: {
|
|
editable_line_t *el = active_edit_line();
|
|
size_t buff_pos = el->position();
|
|
|
|
// Check that the cursor is on a character
|
|
if (buff_pos < el->size()) {
|
|
wchar_t chr = el->text().at(buff_pos);
|
|
wcstring replacement;
|
|
|
|
// Toggle the case of the current character
|
|
bool make_uppercase = iswlower(chr);
|
|
if (make_uppercase) {
|
|
chr = towupper(chr);
|
|
} else {
|
|
chr = tolower(chr);
|
|
}
|
|
|
|
replacement.push_back(chr);
|
|
el->replace_substring(buff_pos, (size_t)1, std::move(replacement));
|
|
|
|
// Restore the buffer position since replace_substring moves
|
|
// the buffer position ahead of the replaced text.
|
|
update_buff_pos(el, buff_pos);
|
|
|
|
command_line_changed(el);
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
}
|
|
break;
|
|
}
|
|
case rl::togglecase_selection: {
|
|
editable_line_t *el = active_edit_line();
|
|
|
|
// Check that we have an active selection and get the bounds.
|
|
size_t start, len;
|
|
if (reader_get_selection(&start, &len)) {
|
|
size_t buff_pos = el->position();
|
|
wcstring replacement;
|
|
|
|
// Loop through the selected characters and toggle their case.
|
|
for (size_t pos = start; pos < start + len && pos < el->size(); pos++) {
|
|
wchar_t chr = el->text().at(pos);
|
|
|
|
// Toggle the case of the current character.
|
|
bool make_uppercase = iswlower(chr);
|
|
if (make_uppercase) {
|
|
chr = towupper(chr);
|
|
} else {
|
|
chr = tolower(chr);
|
|
}
|
|
|
|
replacement.push_back(chr);
|
|
}
|
|
|
|
el->replace_substring(start, len, std::move(replacement));
|
|
|
|
// Restore the buffer position since replace_substring moves
|
|
// the buffer position ahead of the replaced text.
|
|
update_buff_pos(el, buff_pos);
|
|
|
|
command_line_changed(el);
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
}
|
|
break;
|
|
}
|
|
case rl::upcase_word:
|
|
case rl::downcase_word:
|
|
case rl::capitalize_word: {
|
|
editable_line_t *el = active_edit_line();
|
|
// For capitalize_word, whether we've capitalized a character so far.
|
|
bool capitalized_first = false;
|
|
|
|
// We apply the operation from the current location to the end of the word.
|
|
size_t pos = el->position();
|
|
size_t init_pos = pos;
|
|
move_word(el, MOVE_DIR_RIGHT, false, move_word_style_punctuation, false);
|
|
wcstring replacement;
|
|
for (; pos < el->position(); pos++) {
|
|
wchar_t chr = el->text().at(pos);
|
|
|
|
// We always change the case; this decides whether we go uppercase (true) or
|
|
// lowercase (false).
|
|
bool make_uppercase;
|
|
if (c == rl::capitalize_word)
|
|
make_uppercase = !capitalized_first && iswalnum(chr);
|
|
else
|
|
make_uppercase = (c == rl::upcase_word);
|
|
|
|
// Apply the operation and then record what we did.
|
|
if (make_uppercase)
|
|
chr = towupper(chr);
|
|
else
|
|
chr = towlower(chr);
|
|
|
|
replacement.push_back(chr);
|
|
capitalized_first = capitalized_first || make_uppercase;
|
|
}
|
|
el->replace_substring(init_pos, pos - init_pos, std::move(replacement));
|
|
update_buff_pos(el);
|
|
command_line_changed(el);
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::begin_selection:
|
|
case rl::end_selection: {
|
|
sel_start_pos = command_line.position();
|
|
if (c == rl::begin_selection) {
|
|
sel_stop_pos = command_line.position() + 1;
|
|
sel_active = true;
|
|
sel_begin_pos = command_line.position();
|
|
} else {
|
|
sel_stop_pos = command_line.position();
|
|
sel_active = false;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case rl::swap_selection_start_stop: {
|
|
if (!sel_active) break;
|
|
size_t tmp = sel_begin_pos;
|
|
sel_begin_pos = command_line.position();
|
|
sel_start_pos = command_line.position();
|
|
editable_line_t *el = active_edit_line();
|
|
update_buff_pos(el, tmp);
|
|
break;
|
|
}
|
|
case rl::kill_selection: {
|
|
bool newv = (rls.last_cmd != rl::kill_selection);
|
|
size_t start, len;
|
|
if (reader_get_selection(&start, &len)) {
|
|
kill(&command_line, start, len, KILL_APPEND, newv);
|
|
}
|
|
break;
|
|
}
|
|
case rl::forward_jump:
|
|
case rl::backward_jump:
|
|
case rl::forward_jump_till:
|
|
case rl::backward_jump_till: {
|
|
auto direction = (c == rl::forward_jump || c == rl::forward_jump_till)
|
|
? jump_direction_t::forward
|
|
: jump_direction_t::backward;
|
|
auto precision = (c == rl::forward_jump || c == rl::backward_jump)
|
|
? jump_precision_t::to
|
|
: jump_precision_t::till;
|
|
editable_line_t *el = active_edit_line();
|
|
wchar_t target = inputter.function_pop_arg();
|
|
bool success = jump(direction, precision, el, target);
|
|
|
|
inputter.function_set_status(success);
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::repeat_jump: {
|
|
editable_line_t *el = active_edit_line();
|
|
bool success = false;
|
|
|
|
if (last_jump_target) {
|
|
success = jump(last_jump_direction, last_jump_precision, el, last_jump_target);
|
|
}
|
|
|
|
inputter.function_set_status(success);
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
case rl::reverse_repeat_jump: {
|
|
editable_line_t *el = active_edit_line();
|
|
bool success = false;
|
|
jump_direction_t original_dir, dir;
|
|
original_dir = last_jump_direction;
|
|
|
|
if (last_jump_direction == jump_direction_t::forward) {
|
|
dir = jump_direction_t::backward;
|
|
} else {
|
|
dir = jump_direction_t::forward;
|
|
}
|
|
|
|
if (last_jump_target) {
|
|
success = jump(dir, last_jump_precision, el, last_jump_target);
|
|
}
|
|
|
|
last_jump_direction = original_dir;
|
|
|
|
inputter.function_set_status(success);
|
|
mark_repaint_needed();
|
|
break;
|
|
}
|
|
|
|
case rl::expand_abbr: {
|
|
if (expand_abbreviation_as_necessary(1)) {
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
inputter.function_set_status(true);
|
|
} else {
|
|
inputter.function_set_status(false);
|
|
}
|
|
break;
|
|
}
|
|
case rl::undo:
|
|
case rl::redo: {
|
|
editable_line_t *el = active_edit_line();
|
|
bool ok = (c == rl::undo) ? el->undo() : el->redo();
|
|
if (ok) {
|
|
if (el == &command_line) {
|
|
clear_pager();
|
|
}
|
|
update_buff_pos(el);
|
|
command_line_changed(el);
|
|
super_highlight_me_plenty();
|
|
mark_repaint_needed();
|
|
} else {
|
|
flash();
|
|
}
|
|
break;
|
|
}
|
|
// Some commands should have been handled internally by inputter_t::readch().
|
|
case rl::self_insert:
|
|
case rl::self_insert_notfirst:
|
|
case rl::func_or:
|
|
case rl::func_and: {
|
|
DIE("should have been handled by inputter_t::readch");
|
|
}
|
|
}
|
|
}
|
|
|
|
maybe_t<wcstring> reader_data_t::readline(int nchars_or_0) {
|
|
using rl = readline_cmd_t;
|
|
readline_loop_state_t rls{};
|
|
struct termios old_modes;
|
|
|
|
// Suppress fish_trace during executing key bindings.
|
|
// This is simply to reduce noise.
|
|
scoped_push<bool> in_title(&parser().libdata().suppress_fish_trace, true);
|
|
|
|
// If nchars_or_0 is positive, then that's the maximum number of chars. Otherwise keep it at
|
|
// SIZE_MAX.
|
|
if (nchars_or_0 > 0) {
|
|
rls.nchars = static_cast<size_t>(nchars_or_0);
|
|
}
|
|
|
|
// The command line before completion.
|
|
cycle_command_line.clear();
|
|
cycle_cursor_pos = 0;
|
|
|
|
history_search.reset();
|
|
|
|
s_reset_abandoning_line(&screen, termsize_last().width);
|
|
event_fire_generic(parser(), L"fish_prompt");
|
|
exec_prompt();
|
|
|
|
super_highlight_me_plenty();
|
|
repaint();
|
|
|
|
// Get the current terminal modes. These will be restored when the function returns.
|
|
if (tcgetattr(STDIN_FILENO, &old_modes) == -1 && errno == EIO) redirect_tty_output();
|
|
|
|
// Set the new modes.
|
|
if (tcsetattr(0, TCSANOW, &shell_modes) == -1) {
|
|
int err = errno;
|
|
if (err == EIO) {
|
|
redirect_tty_output();
|
|
}
|
|
// This check is required to work around certain issues with fish's approach to
|
|
// terminal control when launching interactive processes while in non-interactive
|
|
// mode. See #4178 for one such example.
|
|
if (err != ENOTTY || session_interactivity() != session_interactivity_t::not_interactive) {
|
|
wperror(L"tcsetattr");
|
|
}
|
|
}
|
|
|
|
while (!rls.finished && !should_exit(&parser())) {
|
|
// Perhaps update the termsize. This is cheap if it has not changed.
|
|
update_termsize();
|
|
|
|
if (rls.nchars <= command_line.size()) {
|
|
// We've already hit the specified character limit.
|
|
rls.finished = true;
|
|
break;
|
|
}
|
|
|
|
maybe_t<char_event_t> event_needing_handling{};
|
|
while (true) {
|
|
event_needing_handling = read_normal_chars(rls);
|
|
if (event_needing_handling.has_value()) break;
|
|
|
|
if (rls.nchars <= command_line.size()) {
|
|
event_needing_handling.reset();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!event_needing_handling || event_needing_handling->is_check_exit()) {
|
|
rls.coalescing_repaints = false;
|
|
repaint_if_needed();
|
|
continue;
|
|
} else if (event_needing_handling->is_eof()) {
|
|
reader_force_exit();
|
|
continue;
|
|
}
|
|
assert((event_needing_handling->is_char() || event_needing_handling->is_readline()) &&
|
|
"Should have a char or readline");
|
|
|
|
if (rls.last_cmd != rl::yank && rls.last_cmd != rl::yank_pop) {
|
|
rls.yank_len = 0;
|
|
}
|
|
|
|
if (event_needing_handling->is_readline()) {
|
|
readline_cmd_t readline_cmd = event_needing_handling->get_readline();
|
|
// If we get something other than a repaint, then stop coalescing them.
|
|
if (readline_cmd != rl::repaint) rls.coalescing_repaints = false;
|
|
|
|
if (readline_cmd == rl::cancel && is_navigating_pager_contents()) {
|
|
clear_transient_edit();
|
|
}
|
|
|
|
// Clear the pager if necessary.
|
|
bool focused_on_search_field = (active_edit_line() == &pager.search_field_line);
|
|
if (command_ends_paging(readline_cmd, focused_on_search_field)) {
|
|
clear_pager();
|
|
}
|
|
|
|
handle_readline_command(readline_cmd, rls);
|
|
|
|
if (history_search.active() && command_ends_history_search(readline_cmd)) {
|
|
// "cancel" means to abort the whole thing, other ending commands mean to finish the
|
|
// search.
|
|
if (readline_cmd == rl::cancel) {
|
|
// Go back to the search string by simply undoing the history-search edit.
|
|
clear_transient_edit();
|
|
}
|
|
history_search.reset();
|
|
}
|
|
|
|
// Readline commands may be bound to \cc which also sets the cancel flag.
|
|
// See #6937.
|
|
signal_clear_cancel();
|
|
|
|
rls.last_cmd = readline_cmd;
|
|
} else {
|
|
// Ordinary char.
|
|
wchar_t c = event_needing_handling->get_char();
|
|
if (event_needing_handling->input_style == char_input_style_t::notfirst &&
|
|
active_edit_line()->position() == 0) {
|
|
// This character is skipped.
|
|
} else if (!fish_reserved_codepoint(c) && (c >= L' ' || c == L'\n' || c == L'\r') &&
|
|
c != 0x7F) {
|
|
// Regular character.
|
|
editable_line_t *el = active_edit_line();
|
|
insert_char(active_edit_line(), c);
|
|
|
|
// End paging upon inserting into the normal command line.
|
|
if (el == &command_line) {
|
|
clear_pager();
|
|
command_line_has_transient_edit = false;
|
|
}
|
|
} else {
|
|
// This can happen if the user presses a control char we don't recognize. No
|
|
// reason to report this to the user unless they've enabled debugging output.
|
|
FLOGF(reader, _(L"Unknown key binding 0x%X"), c);
|
|
}
|
|
rls.last_cmd = none();
|
|
}
|
|
|
|
repaint_if_needed();
|
|
}
|
|
|
|
// Emit a newline so that the output is on the line after the command.
|
|
// But do not emit a newline if the cursor has wrapped onto a new line all its own - see #6826.
|
|
if (!screen.cursor_is_wrapped_to_own_line()) {
|
|
ignore_result(write(STDOUT_FILENO, "\n", 1));
|
|
}
|
|
|
|
// Ensure we have no pager contents when we exit.
|
|
if (!pager.empty()) {
|
|
// Clear to end of screen to erase the pager contents.
|
|
// TODO: this may fail if eos doesn't exist, in which case we should emit newlines.
|
|
screen_force_clear_to_end();
|
|
pager.clear();
|
|
}
|
|
|
|
if (!reader_exit_forced()) {
|
|
// The order of the two conditions below is important. Try to restore the mode
|
|
// in all cases, but only complain if interactive.
|
|
if (tcsetattr(0, TCSANOW, &old_modes) == -1 &&
|
|
session_interactivity() != session_interactivity_t::not_interactive) {
|
|
if (errno == EIO) redirect_tty_output();
|
|
wperror(L"tcsetattr"); // return to previous mode
|
|
}
|
|
outputter_t::stdoutput().set_color(rgb_color_t::reset(), rgb_color_t::reset());
|
|
}
|
|
|
|
return rls.finished ? maybe_t<wcstring>{command_line.text()} : none();
|
|
}
|
|
|
|
bool reader_data_t::jump(jump_direction_t dir, jump_precision_t precision, editable_line_t *el,
|
|
wchar_t target) {
|
|
bool success = false;
|
|
|
|
last_jump_target = target;
|
|
last_jump_direction = dir;
|
|
last_jump_precision = precision;
|
|
|
|
switch (dir) {
|
|
case jump_direction_t::backward: {
|
|
size_t tmp_pos = el->position();
|
|
|
|
while (tmp_pos--) {
|
|
if (el->at(tmp_pos) == target) {
|
|
if (precision == jump_precision_t::till) {
|
|
tmp_pos = std::min(el->size() - 1, tmp_pos + 1);
|
|
}
|
|
update_buff_pos(el, tmp_pos);
|
|
success = true;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case jump_direction_t::forward: {
|
|
for (size_t tmp_pos = el->position() + 1; tmp_pos < el->size(); tmp_pos++) {
|
|
if (el->at(tmp_pos) == target) {
|
|
if (precision == jump_precision_t::till && tmp_pos) {
|
|
tmp_pos--;
|
|
}
|
|
update_buff_pos(el, tmp_pos);
|
|
success = true;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
maybe_t<wcstring> reader_readline(int nchars) { return current_data()->readline(nchars); }
|
|
|
|
bool reader_is_in_search_mode() {
|
|
reader_data_t *data = current_data_or_null();
|
|
return data && data->history_search.active();
|
|
}
|
|
|
|
bool reader_has_pager_contents() {
|
|
reader_data_t *data = current_data_or_null();
|
|
return data && !data->current_page_rendering.screen_data.empty();
|
|
}
|
|
|
|
int reader_reading_interrupted() {
|
|
int res = reader_test_and_clear_interrupted();
|
|
reader_data_t *data = current_data_or_null();
|
|
if (res && data && data->exit_on_interrupt) {
|
|
reader_set_end_loop(true);
|
|
// We handled the interrupt ourselves, our caller doesn't need to handle it.
|
|
return 0;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
void reader_repaint_needed() {
|
|
if (reader_data_t *data = current_data_or_null()) {
|
|
data->mark_repaint_needed();
|
|
}
|
|
}
|
|
|
|
void reader_repaint_if_needed() {
|
|
if (reader_data_t *data = current_data_or_null()) {
|
|
data->repaint_if_needed();
|
|
}
|
|
}
|
|
|
|
void reader_queue_ch(const char_event_t &ch) {
|
|
if (reader_data_t *data = current_data_or_null()) {
|
|
data->inputter.queue_ch(ch);
|
|
}
|
|
}
|
|
|
|
void reader_react_to_color_change() {
|
|
reader_data_t *data = current_data_or_null();
|
|
if (!data) return;
|
|
|
|
if (!data->repaint_needed || !data->screen_reset_needed) {
|
|
data->repaint_needed = true;
|
|
data->screen_reset_needed = true;
|
|
data->inputter.queue_ch(readline_cmd_t::repaint);
|
|
}
|
|
}
|
|
|
|
const wchar_t *reader_get_buffer() {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
reader_data_t *data = current_data_or_null();
|
|
return data ? data->command_line.text().c_str() : nullptr;
|
|
}
|
|
|
|
history_t *reader_get_history() {
|
|
ASSERT_IS_MAIN_THREAD();
|
|
reader_data_t *data = current_data_or_null();
|
|
return data ? data->history : nullptr;
|
|
}
|
|
|
|
void reader_sanity_check() {
|
|
if (reader_data_t *data = current_data_or_null()) {
|
|
data->sanity_check();
|
|
}
|
|
}
|
|
|
|
/// Sets the command line contents, clearing the pager.
|
|
void reader_set_buffer(const wcstring &b, size_t pos) {
|
|
reader_data_t *data = current_data_or_null();
|
|
if (!data) return;
|
|
|
|
data->clear_pager();
|
|
data->set_buffer_maintaining_pager(b, pos);
|
|
}
|
|
|
|
size_t reader_get_cursor_pos() {
|
|
reader_data_t *data = current_data_or_null();
|
|
if (!data) return static_cast<size_t>(-1);
|
|
|
|
return data->command_line.position();
|
|
}
|
|
|
|
bool reader_get_selection(size_t *start, size_t *len) {
|
|
bool result = false;
|
|
reader_data_t *data = current_data_or_null();
|
|
if (data != nullptr && data->sel_active) {
|
|
*start = data->sel_start_pos;
|
|
*len = std::min(data->sel_stop_pos, data->command_line.size()) - data->sel_start_pos;
|
|
result = true;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// Read non-interactively. Read input from stdin without displaying the prompt, using syntax
|
|
/// highlighting. This is used for reading scripts and init files.
|
|
/// The file is not closed.
|
|
static int read_ni(parser_t &parser, int fd, const io_chain_t &io) {
|
|
// Read all data into a std::string.
|
|
std::string fd_contents;
|
|
for (;;) {
|
|
char buff[4096];
|
|
ssize_t amt = read(fd, buff, sizeof buff);
|
|
if (amt > 0) {
|
|
fd_contents.append(buff, amt);
|
|
} else if (amt == 0) {
|
|
// EOF.
|
|
break;
|
|
} else {
|
|
assert(amt == -1);
|
|
int err = errno;
|
|
if (err == EINTR) {
|
|
continue;
|
|
} else if ((err == EAGAIN || err == EWOULDBLOCK) && make_fd_blocking(fd)) {
|
|
// We succeeded in making the fd blocking, keep going.
|
|
continue;
|
|
} else {
|
|
// Fatal error.
|
|
FLOGF(error, _(L"Unable to read input file: %s"), strerror(err));
|
|
// Reset buffer on error. We won't evaluate incomplete files.
|
|
fd_contents.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
wcstring str = str2wcstring(fd_contents);
|
|
|
|
// Eagerly deallocate to save memory.
|
|
fd_contents.clear();
|
|
fd_contents.shrink_to_fit();
|
|
|
|
// Swallow a BOM (issue #1518).
|
|
if (!str.empty() && str.at(0) == UTF8_BOM_WCHAR) {
|
|
str.erase(0, 1);
|
|
}
|
|
|
|
// Parse into an ast and detect errors.
|
|
parse_error_list_t errors;
|
|
auto ast = ast::ast_t::parse(str, parse_flag_none, &errors);
|
|
bool errored = ast.errored();
|
|
if (!errored) {
|
|
errored = parse_util_detect_errors(ast, str, &errors);
|
|
}
|
|
if (!errored) {
|
|
// Construct a parsed source ref.
|
|
// Be careful to transfer ownership, this could be a very large string.
|
|
parsed_source_ref_t ps = std::make_shared<parsed_source_t>(std::move(str), std::move(ast));
|
|
parser.eval(ps, io);
|
|
return 0;
|
|
} else {
|
|
wcstring sb;
|
|
parser.get_backtrace(str, errors, sb);
|
|
std::fwprintf(stderr, L"%ls", sb.c_str());
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
int reader_read(parser_t &parser, int fd, const io_chain_t &io) {
|
|
int res;
|
|
|
|
// If reader_read is called recursively through the '.' builtin, we need to preserve
|
|
// is_interactive. This, and signal handler setup is handled by
|
|
// proc_push_interactive/proc_pop_interactive.
|
|
bool interactive = false;
|
|
// This block is a hack to work around https://sourceware.org/bugzilla/show_bug.cgi?id=20632.
|
|
// See also, commit 396bf12. Without the need for this workaround we would just write:
|
|
// int inter = ((fd == STDIN_FILENO) && isatty(STDIN_FILENO));
|
|
if (fd == STDIN_FILENO) {
|
|
struct termios t;
|
|
int a_tty = isatty(STDIN_FILENO);
|
|
if (a_tty) {
|
|
interactive = true;
|
|
} else if (tcgetattr(STDIN_FILENO, &t) == -1 && errno == EIO) {
|
|
redirect_tty_output();
|
|
interactive = true;
|
|
}
|
|
}
|
|
|
|
scoped_push<bool> interactive_push{&parser.libdata().is_interactive, interactive};
|
|
signal_set_handlers_once(interactive);
|
|
|
|
res = interactive ? read_i(parser) : read_ni(parser, fd, io);
|
|
|
|
// If the exit command was called in a script, only exit the script, not the program.
|
|
reader_set_end_loop(false);
|
|
|
|
return res;
|
|
}
|