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Initial support for navigating completions that appear under the

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commandline using arrow keys
This commit is contained in:
ridiculousfish 2014-01-17 12:04:03 -08:00
parent 64b1b5ca38
commit c6e5201e15
7 changed files with 215 additions and 82 deletions
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2
builtin_commandline.cpp
View file

@ -149,7 +149,7 @@ static void write_part(const wchar_t *begin,
{
wchar_t *buff = wcsndup(begin, end-begin);
// fwprintf( stderr, L"Subshell: %ls, end char %lc\n", buff, *end );
wcstring out;
wcstring out;
tokenizer_t tok(buff, TOK_ACCEPT_UNFINISHED);
for (; tok_has_next(&tok); tok_next(&tok))
{

9
common.h
View file

@ -87,6 +87,15 @@ enum
};
typedef unsigned int escape_flags_t;
/* Directions */
enum cardinal_direction_t
{
direction_north,
direction_east,
direction_south,
direction_west
};
/**
Helper macro for errors
*/

127
pager.cpp
View file

@ -122,6 +122,12 @@ static std::vector<char> pager_buffer;
*/
static wcstring out_buff;
/* Returns numer / denom, rounding up */
static size_t divide_round_up(size_t numer, size_t denom)
{
return numer / denom + (numer % denom ? 1 : 0);
}
/**
This function calculates the minimum width for each completion
entry in the specified array_list. This width depends on the
@ -639,7 +645,7 @@ int pager_t::completion_try_print(int cols, const wcstring &prefix, const comp_i
*/
int print=0;
int rows = (int)((lst.size()-1)/cols+1);
int rows = (int)divide_round_up(lst.size(), cols);
int pref_tot_width=0;
int min_tot_width = 0;
@ -857,6 +863,7 @@ int pager_t::completion_try_print(int cols, const wcstring &prefix, const comp_i
page_rendering_t pager_t::render() const
{
/**
Try to print the completions. Start by trying to print the
list in PAGER_MAX_COLS columns, if the completions won't
@ -864,34 +871,54 @@ page_rendering_t pager_t::render() const
column never fails.
*/
page_rendering_t rendering;
for (int i = PAGER_MAX_COLS; i>0; i--)
rendering.term_width = this->term_width;
rendering.term_height = this->term_height;
rendering.selected_completion_idx = this->selected_completion_idx;
if (! this->empty())
{
/* Initially empty rendering */
rendering.screen_data.resize(0);
switch (completion_try_print(i, prefix, completion_infos, &rendering))
int cols;
bool done = false;
for (cols = PAGER_MAX_COLS; cols > 0 && ! done; cols--)
{
case PAGER_RETRY:
break;
/* Initially empty rendering */
rendering.screen_data.resize(0);
switch (completion_try_print(cols, prefix, completion_infos, &rendering))
{
case PAGER_RETRY:
break;
case PAGER_DONE:
i=0;
break;
case PAGER_DONE:
done = true;
break;
case PAGER_RESIZE:
/*
This means we got a resize event, so we start
over from the beginning. Since it the screen got
bigger, we might be able to fit all completions
on-screen.
*/
i=PAGER_MAX_COLS+1;
break;
case PAGER_RESIZE:
/*
This means we got a resize event, so we start
over from the beginning. Since it the screen got
bigger, we might be able to fit all completions
on-screen.
*/
cols=PAGER_MAX_COLS+1;
break;
}
}
assert(cols >= 0);
rendering.cols = (size_t)cols;
rendering.rows = divide_round_up(completion_infos.size(), rendering.cols);
}
return rendering;
}
void pager_t::update_rendering(page_rendering_t *rendering) const
{
if (rendering->term_width != this->term_width || rendering->term_height != this->term_height || rendering->selected_completion_idx != this->selected_completion_idx)
{
*rendering = this->render();
}
}
pager_t::pager_t() : term_width(0), term_height(0), selected_completion_idx(-1)
{
}
@ -906,6 +933,62 @@ void pager_t::set_selected_completion(size_t idx)
this->selected_completion_idx = idx;
}
bool pager_t::select_next_completion_in_direction(cardinal_direction_t direction, const page_rendering_t &rendering)
{
/* Handle the case of nothing selected yet */
if (selected_completion_idx == (size_t)(-1))
{
return false;
}
/* We have a completion index; we wish to compute its row and column. Completions are rendered column first, i.e. we go south before we go west. */
size_t current_row = selected_completion_idx % rendering.rows;
size_t current_col = selected_completion_idx / rendering.rows;
switch (direction)
{
case direction_north:
{
/* Go up a whole row */
if (current_row > 0)
current_row--;
break;
}
case direction_south:
{
/* Go down, unless we are in the last row. Note that this means that we may set selected_completion_idx to an out-of-bounds value if the last row is incomplete; this is a feature (it allows "last column memory"). */
if (current_row + 1 < rendering.rows)
current_row++;
break;
}
case direction_east:
{
if (current_col + 1 < rendering.cols)
current_col++;
break;
}
case direction_west:
{
if (current_col > 0)
current_col--;
break;
}
}
size_t new_selected_completion_idx = current_col * rendering.rows + current_row;
if (new_selected_completion_idx != selected_completion_idx)
{
selected_completion_idx = new_selected_completion_idx;
return true;
}
else
{
return false;
}
}
void pager_t::clear()
{
@ -913,3 +996,7 @@ void pager_t::clear()
completion_infos.clear();
prefix.clear();
}
page_rendering_t::page_rendering_t() : term_width(-1), term_height(-1), rows(0), cols(0), selected_completion_idx(-1)
{
}

17
pager.h
View file

@ -6,9 +6,18 @@
#include "screen.h"
/* Represents rendering from the pager */
struct page_rendering_t
class page_rendering_t
{
public:
int term_width;
int term_height;
size_t rows;
size_t cols;
size_t selected_completion_idx;
screen_data_t screen_data;
/* Returns a rendering with invalid data, useful to indicate "no rendering" */
page_rendering_t();
};
typedef std::vector<completion_t> completion_list_t;
@ -79,9 +88,15 @@ class pager_t
/* Sets the index of the selected completion */
void set_selected_completion(size_t completion_idx);
/* Changes the selected completion in the given direction according to the layout of the given rendering. Returns true if the values changed. */
bool select_next_completion_in_direction(cardinal_direction_t direction, const page_rendering_t &rendering);
/* Produces a rendering of the completions, at the given term size */
page_rendering_t render() const;
/* Updates the rendering if it's stale */
void update_rendering(page_rendering_t *rendering) const;
/* Indicates if there are no completions, and therefore nothing to render */
bool empty() const;

123
reader.cpp
View file

@ -201,6 +201,9 @@ public:
/** Current pager */
pager_t current_pager;
/** Current page rendering */
page_rendering_t current_page_rendering;
/** Whether we are navigating the pager */
bool is_navigating_pager;
@ -538,6 +541,10 @@ static void reader_repaint()
std::vector<int> indents = data->indents;
indents.resize(len);
// Re-render our completions page if necessary
data->current_pager.set_term_size(common_get_width(), common_get_height());
data->current_pager.update_rendering(&data->current_page_rendering);
s_write(&data->screen,
data->left_prompt_buff,
@ -547,7 +554,7 @@ static void reader_repaint()
&colors[0],
&indents[0],
data->buff_pos,
data->current_pager);
data->current_page_rendering);
data->repaint_needed = false;
}
@ -1852,33 +1859,31 @@ static bool handle_completions(const std::vector<completion_t> &comp)
prefix.append(data->command_line, prefix_start + len - PREFIX_MAX_LEN, PREFIX_MAX_LEN);
}
wchar_t quote;
parse_util_get_parameter_info(data->command_line, data->buff_pos, &quote, NULL, NULL);
bool is_quoted = (quote != L'\0');
if (1)
{
int is_quoted;
wchar_t quote;
parse_util_get_parameter_info(data->command_line, data->buff_pos, &quote, NULL, NULL);
is_quoted = (quote != L'\0');
data->current_pager.set_prefix(prefix);
data->current_pager.set_completions(surviving_completions);
if (1)
{
pager_t pager;
pager.set_term_size(common_get_width(), common_get_height());
pager.set_prefix(prefix);
pager.set_completions(surviving_completions);
data->current_pager = pager;
}
else
{
/* Clear the autosuggestion from the old commandline before abandoning it (see #561) */
if (! data->autosuggestion.empty())
reader_repaint_without_autosuggestion();
write_loop(1, "\n", 1);
run_pager(prefix, is_quoted, surviving_completions);
}
/* Invalidate our rendering */
data->current_page_rendering = page_rendering_t();
}
else
{
/* Clear the autosuggestion from the old commandline before abandoning it (see #561) */
if (! data->autosuggestion.empty())
reader_repaint_without_autosuggestion();
write_loop(1, "\n", 1);
run_pager(prefix, is_quoted, surviving_completions);
s_reset(&data->screen, screen_reset_abandon_line);
}
s_reset(&data->screen, screen_reset_abandon_line);
reader_repaint();
success = false;
}
@ -2970,6 +2975,9 @@ const wchar_t *reader_readline(void)
/* The cycle index in our completion list */
size_t completion_cycle_idx = (size_t)(-1);
/* Indicates if we are currently navigating pager contents */
bool is_navigating_pager_contents = false;
/* The command line before completion */
wcstring cycle_command_line;
@ -3152,6 +3160,8 @@ const wchar_t *reader_readline(void)
if (next_comp != NULL)
{
is_navigating_pager_contents = true;
size_t cursor_pos = cycle_cursor_pos;
const wcstring new_cmd_line = completion_apply_to_command_line(next_comp->completion, next_comp->flags, cycle_command_line, &cursor_pos, false);
reader_set_buffer(new_cmd_line, cursor_pos);
@ -3628,38 +3638,49 @@ const wchar_t *reader_readline(void)
case R_UP_LINE:
case R_DOWN_LINE:
{
int line_old = parse_util_get_line_from_offset(data->command_line, data->buff_pos);
int line_new;
if (c == R_UP_LINE)
line_new = line_old-1;
else
line_new = line_old+1;
int line_count = parse_util_lineno(data->command_line.c_str(), data->command_length())-1;
if (line_new >= 0 && line_new <= line_count)
if (is_navigating_pager_contents)
{
size_t base_pos_new;
size_t base_pos_old;
if (data->current_pager.select_next_completion_in_direction(c == R_UP_LINE ? direction_north : direction_south, data->current_page_rendering))
{
reader_repaint();
}
}
else
{
/* Not navigating the pager contents */
int line_old = parse_util_get_line_from_offset(data->command_line, data->buff_pos);
int line_new;
int indent_old;
int indent_new;
size_t line_offset_old;
size_t total_offset_new;
if (c == R_UP_LINE)
line_new = line_old-1;
else
line_new = line_old+1;
base_pos_new = parse_util_get_offset_from_line(data->command_line, line_new);
int line_count = parse_util_lineno(data->command_line.c_str(), data->command_length())-1;
base_pos_old = parse_util_get_offset_from_line(data->command_line, line_old);
if (line_new >= 0 && line_new <= line_count)
{
size_t base_pos_new;
size_t base_pos_old;
assert(base_pos_new != (size_t)(-1) && base_pos_old != (size_t)(-1));
indent_old = data->indents.at(base_pos_old);
indent_new = data->indents.at(base_pos_new);
int indent_old;
int indent_new;
size_t line_offset_old;
size_t total_offset_new;
line_offset_old = data->buff_pos - parse_util_get_offset_from_line(data->command_line, line_old);
total_offset_new = parse_util_get_offset(data->command_line, line_new, line_offset_old - 4*(indent_new-indent_old));
data->buff_pos = total_offset_new;
reader_repaint();
base_pos_new = parse_util_get_offset_from_line(data->command_line, line_new);
base_pos_old = parse_util_get_offset_from_line(data->command_line, line_old);
assert(base_pos_new != (size_t)(-1) && base_pos_old != (size_t)(-1));
indent_old = data->indents.at(base_pos_old);
indent_new = data->indents.at(base_pos_new);
line_offset_old = data->buff_pos - parse_util_get_offset_from_line(data->command_line, line_old);
total_offset_new = parse_util_get_offset(data->command_line, line_new, line_offset_old - 4*(indent_new-indent_old));
data->buff_pos = total_offset_new;
reader_repaint();
}
}
break;

10
screen.cpp
View file

@ -1237,7 +1237,7 @@ void s_write(screen_t *s,
const highlight_spec_t *colors,
const int *indent,
size_t cursor_pos,
const pager_t &pager)
const page_rendering_t &pager)
{
screen_data_t::cursor_t cursor_arr;
@ -1325,12 +1325,8 @@ void s_write(screen_t *s,
s->desired.cursor = cursor_arr;
/* append pager_data */
if (! pager.empty())
{
const page_rendering_t rendering = pager.render();
s->desired.append_lines(rendering.screen_data);
}
/* Append pager_data (none if empty) */
s->desired.append_lines(pager.screen_data);
s_update(s, layout.left_prompt.c_str(), layout.right_prompt.c_str());
s_save_status(s);

9
screen.h
View file

@ -16,7 +16,7 @@
#include <sys/stat.h>
#include "highlight.h"
class pager_t;
class page_rendering_t;
/**
A class representing a single line of a screen.
@ -117,6 +117,11 @@ public:
{
this->line_datas.insert(this->line_datas.end(), d.line_datas.begin(), d.line_datas.end());
}
bool empty() const
{
return line_datas.empty();
}
};
/**
@ -205,7 +210,7 @@ void s_write(screen_t *s,
const highlight_spec_t *colors,
const int *indent,
size_t cursor_pos,
const pager_t &pager_data);
const page_rendering_t &pager_data);
/**
This function resets the screen buffers internal knowledge about