mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-27 05:13:10 +00:00
955 lines
23 KiB
C++
955 lines
23 KiB
C++
/** \file screen.c High level library for handling the terminal screen
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The screen library allows the interactive reader to write its
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output to screen efficiently by keeping an inetrnal representation
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of the current screen contents and trying to find the most
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efficient way for transforming that to the desired screen content.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <termios.h>
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#include <sys/types.h>
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#ifdef HAVE_SYS_TERMIOS_H
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#include <sys/termios.h>
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#endif
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#include <unistd.h>
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#include <wctype.h>
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#if HAVE_NCURSES_H
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#include <ncurses.h>
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#else
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#include <curses.h>
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#endif
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#if HAVE_TERMIO_H
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#include <termio.h>
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#endif
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#if HAVE_TERM_H
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#include <term.h>
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#elif HAVE_NCURSES_TERM_H
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#include <ncurses/term.h>
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#endif
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#include <wchar.h>
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#include <time.h>
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#include <assert.h>
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#include <vector>
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#include "fallback.h"
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#include "common.h"
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#include "util.h"
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#include "wutil.h"
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#include "output.h"
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#include "highlight.h"
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#include "screen.h"
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#include "env.h"
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/**
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The number of characters to indent new blocks
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*/
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#define INDENT_STEP 4
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/**
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Ugly kludge. The internal buffer used to store output of
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tputs. Since tputs external function can only take an integer and
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not a pointer as parameter we need a static storage buffer.
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*/
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typedef std::vector<char> data_buffer_t;
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static data_buffer_t *s_writeb_buffer=0;
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static int s_writeb( char c );
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/* Class to temporarily set s_writeb_buffer and the writer function in a scoped way */
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class scoped_buffer_t {
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data_buffer_t * const old_buff;
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int (* const old_writer)(char);
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public:
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scoped_buffer_t(data_buffer_t *buff) : old_buff(s_writeb_buffer), old_writer(output_get_writer())
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{
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s_writeb_buffer = buff;
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output_set_writer(s_writeb);
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}
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~scoped_buffer_t()
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{
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s_writeb_buffer = old_buff;
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output_set_writer(old_writer);
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}
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};
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/**
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Tests if the specified narrow character sequence is present at the
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specified position of the specified wide character string. All of
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\c seq must match, but str may be longer than seq.
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*/
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static int try_sequence( const char *seq, const wchar_t *str )
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{
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int i;
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for( i=0;; i++ )
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{
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if( !seq[i] )
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return i;
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if( seq[i] != str[i] )
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return 0;
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}
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return 0;
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}
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/**
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Returns the number of columns left until the next tab stop, given
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the current cursor postion.
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*/
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static size_t next_tab_stop( size_t in )
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{
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/*
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Assume tab stops every 8 characters if undefined
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*/
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if( init_tabs <= 0 )
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init_tabs = 8;
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return ( (in/init_tabs)+1 )*init_tabs;
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}
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// PCA for term256 support, let's just detect the escape codes directly
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static int is_term256_escape(const wchar_t *str) {
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// An escape code looks like this: \x1b[38;5;<num>m
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// or like this: \x1b[48;5;<num>m
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// parse out the required prefix
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int len = try_sequence("\x1b[38;5;", str);
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if (! len) len = try_sequence("\x1b[48;5;", str);
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if (! len) return 0;
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// now try parsing out a string of digits
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// we need at least one
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if (! iswdigit(str[len])) return 0;
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while (iswdigit(str[len])) len++;
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// look for the terminating m
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if (str[len++] != L'm') return 0;
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// success
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return len;
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}
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/**
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Calculate the width of the specified prompt. Does some clever magic
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to detect common escape sequences that may be embeded in a prompt,
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such as color codes.
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*/
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static size_t calc_prompt_width( const wchar_t *prompt )
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{
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size_t res = 0;
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size_t j, k;
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for( j=0; prompt[j]; j++ )
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{
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if( prompt[j] == L'\x1b' )
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{
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/*
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This is the start of an escape code. Try to guess it's width.
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*/
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size_t p;
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int len=0;
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bool found = false;
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/*
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Detect these terminfo color escapes with parameter
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value 0..7, all of which don't move the cursor
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*/
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char * const esc[] =
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{
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set_a_foreground,
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set_a_background,
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set_foreground,
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set_background,
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}
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;
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/*
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Detect these semi-common terminfo escapes without any
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parameter values, all of which don't move the cursor
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*/
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char * const esc2[] =
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{
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enter_bold_mode,
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exit_attribute_mode,
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enter_underline_mode,
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exit_underline_mode,
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enter_standout_mode,
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exit_standout_mode,
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flash_screen,
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enter_subscript_mode,
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exit_subscript_mode,
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enter_superscript_mode,
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exit_superscript_mode,
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enter_blink_mode,
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enter_italics_mode,
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exit_italics_mode,
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enter_reverse_mode,
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enter_shadow_mode,
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exit_shadow_mode,
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enter_standout_mode,
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exit_standout_mode,
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enter_secure_mode
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}
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;
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for( p=0; p < sizeof esc / sizeof *esc && !found; p++ )
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{
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if( !esc[p] )
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continue;
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for( k=0; k<8; k++ )
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{
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len = try_sequence( tparm(esc[p],k), &prompt[j] );
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if( len )
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{
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j += (len-1);
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found = true;
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break;
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}
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}
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}
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// PCA for term256 support, let's just detect the escape codes directly
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if (! found) {
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len = is_term256_escape(&prompt[j]);
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if (len) {
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j += (len - 1);
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found = true;
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}
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}
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for( p=0; p < (sizeof(esc2)/sizeof(char *)) && !found; p++ )
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{
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if( !esc2[p] )
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continue;
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/*
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Test both padded and unpadded version, just to
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be safe. Most versions of tparm don't actually
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seem to do anything these days.
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*/
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len = maxi( try_sequence( tparm(esc2[p]), &prompt[j] ),
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try_sequence( esc2[p], &prompt[j] ));
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if( len )
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{
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j += (len-1);
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found = true;
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}
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}
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if( !found )
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{
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if( prompt[j+1] == L'k' )
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{
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const env_var_t term_name = env_get_string( L"TERM" );
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if( !term_name.missing() && wcsstr( term_name.c_str(), L"screen" ) == term_name )
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{
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const wchar_t *end;
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j+=2;
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found = true;
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end = wcsstr( &prompt[j], L"\x1b\\" );
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if( end )
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{
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/*
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You'd thing this should be
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'(end-prompt)+2', in order to move j
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past the end of the string, but there is
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a 'j++' at the end of each lap, so j
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should always point to the last menged
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character, e.g. +1.
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*/
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j = (end-prompt)+1;
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}
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else
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{
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break;
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}
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}
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}
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}
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}
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else if( prompt[j] == L'\t' )
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{
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res = next_tab_stop( res );
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}
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else if( prompt[j] == L'\n' )
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{
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res = 0;
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}
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else
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{
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/*
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Ordinary decent character. Just add width.
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*/
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res += fish_wcwidth( prompt[j] );
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}
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}
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return res;
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}
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/**
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Test if there is space between the time fields of struct stat to
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use for sub second information. If so, we assume this space
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contains the desired information.
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*/
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static int room_for_usec(struct stat *st)
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{
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int res = ((&(st->st_atime) + 2) == &(st->st_mtime) &&
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(&(st->st_atime) + 4) == &(st->st_ctime));
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return res;
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}
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/**
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Stat stdout and stderr and save result.
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This should be done before calling a function that may cause output.
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*/
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static void s_save_status( screen_t *s)
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{
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// PCA Let's not do this futimes stuff, because sudo dumbly uses the
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// tty's ctime as part of its tty_tickets feature
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// Disabling this should fix https://github.com/fish-shell/fish-shell/issues/122
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#if 0
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/*
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This futimes call tries to trick the system into using st_mtime
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as a tampering flag. This of course only works on systems where
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futimes is defined, but it should make the status saving stuff
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failsafe.
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*/
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struct timeval t[]=
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{
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{
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time(0)-1,
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0
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}
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,
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{
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time(0)-1,
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0
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}
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}
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;
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/*
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Don't check return value on these. We don't care if they fail,
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really. This is all just to make the prompt look ok, which is
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impossible to do 100% reliably. We try, at least.
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*/
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futimes( 1, t );
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futimes( 2, t );
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#endif
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fstat( 1, &s->prev_buff_1 );
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fstat( 2, &s->prev_buff_2 );
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}
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/**
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Stat stdout and stderr and compare result to previous result in
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reader_save_status. Repaint if modification time has changed.
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Unfortunately, for some reason this call seems to give a lot of
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false positives, at least under Linux.
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*/
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static void s_check_status( screen_t *s)
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{
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fflush( stdout );
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fflush( stderr );
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fstat( 1, &s->post_buff_1 );
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fstat( 2, &s->post_buff_2 );
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int changed = ( s->prev_buff_1.st_mtime != s->post_buff_1.st_mtime ) ||
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( s->prev_buff_2.st_mtime != s->post_buff_2.st_mtime );
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if (room_for_usec( &s->post_buff_1))
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{
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changed = changed || ( (&s->prev_buff_1.st_mtime)[1] != (&s->post_buff_1.st_mtime)[1] ) ||
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( (&s->prev_buff_2.st_mtime)[1] != (&s->post_buff_2.st_mtime)[1] );
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}
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if( changed )
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{
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/*
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Ok, someone has been messing with our screen. We will want
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to repaint. However, we do not know where the cursor is. It
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is our best bet that we are still on the same line, so we
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move to the beginning of the line, reset the modelled screen
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contents, and then set the modeled cursor y-pos to its
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earlier value.
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*/
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int prev_line = s->actual.cursor.y;
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write_loop( 1, "\r", 1 );
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s_reset( s, false );
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s->actual.cursor.y = prev_line;
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}
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}
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/**
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Appends a character to the end of the line that the output cursor is
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on. This function automatically handles linebreaks and lines longer
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than the screen width.
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*/
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static void s_desired_append_char( screen_t *s,
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wchar_t b,
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int c,
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int indent,
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size_t prompt_width )
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{
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int line_no = s->desired.cursor.y;
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switch( b )
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{
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case L'\n':
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{
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int i;
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s->desired.create_line(s->desired.line_count());
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s->desired.cursor.y++;
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s->desired.cursor.x=0;
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for( i=0; i < prompt_width+indent*INDENT_STEP; i++ )
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{
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s_desired_append_char( s, L' ', 0, indent, prompt_width );
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}
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break;
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}
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case L'\r':
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{
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line_t ¤t = s->desired.line(line_no);
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current.clear();
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s->desired.cursor.x = 0;
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break;
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}
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default:
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{
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int screen_width = common_get_width();
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int cw = fish_wcwidth(b);
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int ew = fish_wcwidth( ellipsis_char );
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s->desired.create_line(line_no);
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/*
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Check if we are at the end of the line. If so, print an
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ellipsis character and continue on the next line.
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*/
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if( s->desired.cursor.x + cw + ew > screen_width )
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{
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s->desired.line(line_no).append(ellipsis_char, HIGHLIGHT_COMMENT);
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line_no = (int)s->desired.line_count();
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s->desired.add_line();
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s->desired.cursor.y++;
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s->desired.cursor.x=0;
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if (prompt_width > ew) {
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for( size_t i=0; i < (prompt_width-ew); i++ )
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{
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s_desired_append_char( s, L' ', 0, indent, prompt_width );
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}
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}
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s_desired_append_char( s, ellipsis_char, HIGHLIGHT_COMMENT, indent, prompt_width );
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}
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line_t &line = s->desired.line(line_no);
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line.append(b, c);
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s->desired.cursor.x+= cw;
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break;
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}
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}
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}
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/**
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The writeb function offered to tputs.
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*/
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static int s_writeb( char c )
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{
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s_writeb_buffer->push_back(c);
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return 0;
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}
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/**
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Write the bytes needed to move screen cursor to the specified
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position to the specified buffer. The actual_cursor field of the
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specified screen_t will be updated.
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\param s the screen to operate on
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\param b the buffer to send the output escape codes to
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\param new_x the new x position
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\param new_y the new y position
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*/
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static void s_move( screen_t *s, data_buffer_t *b, int new_x, int new_y )
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{
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int i;
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int x_steps, y_steps;
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char *str;
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/*
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debug( 0, L"move from %d %d to %d %d",
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s->screen_cursor[0], s->screen_cursor[1],
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new_x, new_y );
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*/
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scoped_buffer_t scoped_buffer(b);
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y_steps = new_y - s->actual.cursor.y;
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if( y_steps > 0 && (strcmp( cursor_down, "\n")==0))
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{
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/*
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This is very strange - it seems some (all?) consoles use a
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simple newline as the cursor down escape. This will of
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course move the cursor to the beginning of the line as well
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as moving it down one step. The cursor_up does not have this
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behaviour...
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*/
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s->actual.cursor.x=0;
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}
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if( y_steps < 0 )
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{
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str = cursor_up;
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}
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else
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{
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str = cursor_down;
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}
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for( i=0; i<abs(y_steps); i++)
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{
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writembs(str);
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}
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x_steps = new_x - s->actual.cursor.x;
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if( x_steps && new_x == 0 )
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{
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b->push_back('\r');
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x_steps = 0;
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}
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if( x_steps < 0 )
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{
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str = cursor_left;
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}
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else
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{
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str = cursor_right;
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}
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for( i=0; i<abs(x_steps); i++)
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{
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writembs(str);
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}
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s->actual.cursor.x = new_x;
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s->actual.cursor.y = new_y;
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}
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/**
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Set the pen color for the terminal
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*/
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static void s_set_color( screen_t *s, data_buffer_t *b, int c )
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{
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scoped_buffer_t scoped_buffer(b);
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|
|
unsigned int uc = (unsigned int)c;
|
|
set_color( highlight_get_color( uc & 0xffff, false ),
|
|
highlight_get_color( (uc>>16)&0xffff, true ) );
|
|
}
|
|
|
|
/**
|
|
Convert a wide character to a multibyte string and append it to the
|
|
buffer.
|
|
*/
|
|
static void s_write_char( screen_t *s, data_buffer_t *b, wchar_t c )
|
|
{
|
|
scoped_buffer_t scoped_buffer(b);
|
|
s->actual.cursor.x+=fish_wcwidth( c );
|
|
writech( c );
|
|
}
|
|
|
|
/**
|
|
Convert a wide string to a multibyte string and append it to the
|
|
buffer. Returns the width.
|
|
*/
|
|
static int s_write_string( screen_t *s, data_buffer_t *b, const wcstring &str )
|
|
{
|
|
scoped_buffer_t scoped_buffer(b);
|
|
int width = fish_wcswidth(str.c_str(), str.size());
|
|
writestr(str.c_str());
|
|
s->actual.cursor.x += width;
|
|
return width;
|
|
}
|
|
|
|
/**
|
|
Send the specified string through tputs and append the output to
|
|
the specified buffer.
|
|
*/
|
|
static void s_write_mbs( data_buffer_t *b, char *s )
|
|
{
|
|
scoped_buffer_t scoped_buffer(b);
|
|
writembs( s );
|
|
}
|
|
|
|
/**
|
|
Convert a wide string to a multibyte string and append it to the
|
|
buffer.
|
|
*/
|
|
static void s_write_str( data_buffer_t *b, const wchar_t *s )
|
|
{
|
|
scoped_buffer_t scoped_buffer(b);
|
|
writestr( s );
|
|
}
|
|
|
|
/** Returns the length of the "shared prefix" of the two lines, which is the run of matching text and colors.
|
|
If the prefix ends on a combining character, do not include the previous character in the prefix.
|
|
*/
|
|
static size_t line_shared_prefix(const line_t &a, const line_t &b)
|
|
{
|
|
size_t idx, max = std::min(a.size(), b.size());
|
|
for (idx=0; idx < max; idx++)
|
|
{
|
|
wchar_t ac = a.char_at(idx), bc = b.char_at(idx);
|
|
if (fish_wcwidth(ac) < 1 || fish_wcwidth(bc) < 1)
|
|
{
|
|
/* Possible combining mark, return one index prior */
|
|
if (idx > 0) idx--;
|
|
break;
|
|
}
|
|
|
|
/* We're done if the text or colors are different */
|
|
if (ac != bc || a.color_at(idx) != b.color_at(idx))
|
|
break;
|
|
}
|
|
return idx;
|
|
}
|
|
|
|
/**
|
|
Update the screen to match the desired output.
|
|
*/
|
|
static void s_update( screen_t *scr, const wchar_t *prompt )
|
|
{
|
|
size_t prompt_width = calc_prompt_width( prompt );
|
|
int screen_width = common_get_width();
|
|
int need_clear = scr->need_clear;
|
|
data_buffer_t output;
|
|
|
|
scr->need_clear = 0;
|
|
|
|
if( scr->actual_width != screen_width )
|
|
{
|
|
need_clear = 1;
|
|
s_move( scr, &output, 0, 0 );
|
|
scr->actual_width = screen_width;
|
|
s_reset( scr, false );
|
|
}
|
|
|
|
if( wcscmp( prompt, scr->actual_prompt.c_str() ) )
|
|
{
|
|
s_move( scr, &output, 0, 0 );
|
|
s_write_str( &output, prompt );
|
|
scr->actual_prompt = prompt;
|
|
scr->actual.cursor.x = (int)prompt_width;
|
|
}
|
|
|
|
for (size_t i=0; i < scr->desired.line_count(); i++)
|
|
{
|
|
const line_t &o_line = scr->desired.line(i);
|
|
line_t &s_line = scr->actual.create_line(i);
|
|
size_t start_pos = (i==0 ? prompt_width : 0);
|
|
int current_width = 0;
|
|
|
|
if( need_clear )
|
|
{
|
|
s_move( scr, &output, (int)start_pos, (int)i );
|
|
s_write_mbs( &output, clr_eol);
|
|
s_line.clear();
|
|
}
|
|
|
|
/* Note that skip_remaining is a width, not a character count */
|
|
size_t skip_remaining = start_pos;
|
|
|
|
/* Compute how much we should skip. At a minimum we skip over the prompt. But also skip over the shared prefix of what we want to output now, and what we output before, to avoid repeatedly outputting it. */
|
|
size_t shared_prefix = line_shared_prefix(o_line, s_line);
|
|
if (shared_prefix > 0)
|
|
{
|
|
int prefix_width = fish_wcswidth(&o_line.text.at(0), shared_prefix);
|
|
if (prefix_width > skip_remaining)
|
|
skip_remaining = prefix_width;
|
|
}
|
|
|
|
/* Skip over skip_remaining width worth of characters */
|
|
size_t j = 0;
|
|
for ( ; j < o_line.size(); j++)
|
|
{
|
|
int width = fish_wcwidth(o_line.char_at(j));
|
|
if (skip_remaining <= width)
|
|
break;
|
|
skip_remaining -= width;
|
|
current_width += width;
|
|
}
|
|
|
|
/* Skip over zero-width characters (e.g. combining marks at the end of the prompt) */
|
|
for ( ; j < o_line.size(); j++)
|
|
{
|
|
int width = fish_wcwidth(o_line.char_at(j));
|
|
if (width > 0)
|
|
break;
|
|
}
|
|
|
|
/* Now actually output stuff */
|
|
for ( ; j < o_line.size(); j++)
|
|
{
|
|
s_move( scr, &output, current_width, (int)i );
|
|
s_set_color( scr, &output, o_line.color_at(j) );
|
|
s_write_char( scr, &output, o_line.char_at(j) );
|
|
current_width += fish_wcwidth(o_line.char_at(j));
|
|
}
|
|
|
|
/* If we wrote more on this line last time, clear it */
|
|
int prev_length = (s_line.text.empty() ? 0 : fish_wcswidth(&s_line.text.at(0), s_line.text.size()));
|
|
if (prev_length > current_width )
|
|
{
|
|
s_move( scr, &output, current_width, (int)i );
|
|
s_write_mbs( &output, clr_eol);
|
|
}
|
|
}
|
|
|
|
/* Clear remaining lines */
|
|
for( size_t i=scr->desired.line_count(); i < scr->actual.line_count(); i++ )
|
|
{
|
|
s_move( scr, &output, 0, (int)i );
|
|
s_write_mbs( &output, clr_eol);
|
|
}
|
|
|
|
s_move( scr, &output, scr->desired.cursor.x, scr->desired.cursor.y );
|
|
s_set_color( scr, &output, 0xffffffff);
|
|
|
|
if( ! output.empty() )
|
|
{
|
|
write_loop( 1, &output.at(0), output.size() );
|
|
}
|
|
|
|
/* We have now synced our actual screen against our desired screen. Note that this is a big assignment! */
|
|
scr->actual = scr->desired;
|
|
}
|
|
|
|
/**
|
|
Returns non-zero if we are using a dumb terminal.
|
|
*/
|
|
static int is_dumb()
|
|
{
|
|
return ( !cursor_up || !cursor_down || !cursor_left || !cursor_right );
|
|
}
|
|
|
|
|
|
|
|
void s_write( screen_t *s,
|
|
const wchar_t *prompt,
|
|
const wchar_t *commandline,
|
|
size_t explicit_len,
|
|
const int *c,
|
|
const int *indent,
|
|
size_t cursor_pos )
|
|
{
|
|
screen_data_t::cursor_t cursor_arr;
|
|
|
|
size_t prompt_width;
|
|
size_t screen_width;
|
|
|
|
int current_line_width = 0, newline_count = 0, explicit_portion_width = 0;
|
|
size_t max_line_width = 0;
|
|
|
|
CHECK( s, );
|
|
CHECK( prompt, );
|
|
CHECK( commandline, );
|
|
CHECK( c, );
|
|
CHECK( indent, );
|
|
|
|
/*
|
|
If we are using a dumb terminal, don't try any fancy stuff,
|
|
just print out the text.
|
|
*/
|
|
if( is_dumb() )
|
|
{
|
|
char *prompt_narrow = wcs2str( prompt );
|
|
char *buffer_narrow = wcs2str( commandline );
|
|
|
|
write_loop( 1, "\r", 1 );
|
|
write_loop( 1, prompt_narrow, strlen( prompt_narrow ) );
|
|
write_loop( 1, buffer_narrow, strlen( buffer_narrow ) );
|
|
|
|
free( prompt_narrow );
|
|
free( buffer_narrow );
|
|
|
|
return;
|
|
}
|
|
|
|
prompt_width = calc_prompt_width( prompt );
|
|
screen_width = common_get_width();
|
|
|
|
s_check_status( s );
|
|
|
|
/*
|
|
Ignore prompts wider than the screen - only print a two
|
|
character placeholder...
|
|
|
|
It would be cool to truncate the prompt, but because it can
|
|
contain escape sequences, this is harder than you'd think.
|
|
*/
|
|
if( prompt_width >= screen_width )
|
|
{
|
|
prompt = L"> ";
|
|
prompt_width = 2;
|
|
}
|
|
|
|
/*
|
|
Completely ignore impossibly small screens
|
|
*/
|
|
if( screen_width < 4 )
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
Check if we are overflowing
|
|
*/
|
|
size_t last_char_that_fits = 0;
|
|
for( size_t i=0; commandline[i]; i++ )
|
|
{
|
|
if( commandline[i] == L'\n' )
|
|
{
|
|
if( current_line_width > max_line_width )
|
|
max_line_width = current_line_width;
|
|
current_line_width = indent[i]*INDENT_STEP;
|
|
newline_count++;
|
|
}
|
|
else
|
|
{
|
|
int width = fish_wcwidth(commandline[i]);
|
|
current_line_width += width;
|
|
if (i < explicit_len)
|
|
explicit_portion_width += width;
|
|
|
|
if (prompt_width + current_line_width < screen_width)
|
|
last_char_that_fits = i;
|
|
}
|
|
}
|
|
if( current_line_width > max_line_width )
|
|
max_line_width = current_line_width;
|
|
|
|
s->desired.resize(0);
|
|
s->desired.cursor.x = s->desired.cursor.y = 0;
|
|
|
|
/* If we cannot fit with the autosuggestion, but we can fit without it, truncate the autosuggestion. We limit this check to just one line to avoid confusion; not sure how well this would work with multiple lines */
|
|
wcstring truncated_autosuggestion_line;
|
|
if (newline_count == 0 && prompt_width + max_line_width >= screen_width && prompt_width + explicit_portion_width < screen_width)
|
|
{
|
|
assert(screen_width - prompt_width >= 1);
|
|
max_line_width = screen_width - prompt_width - 1;
|
|
truncated_autosuggestion_line = wcstring(commandline, 0, last_char_that_fits);
|
|
truncated_autosuggestion_line.push_back(ellipsis_char);
|
|
commandline = truncated_autosuggestion_line.c_str();
|
|
}
|
|
for( size_t i=0; i<prompt_width; i++ )
|
|
{
|
|
s_desired_append_char( s, L' ', 0, 0, prompt_width );
|
|
}
|
|
|
|
/*
|
|
If overflowing, give the prompt its own line to improve the
|
|
situation.
|
|
*/
|
|
if( max_line_width + prompt_width >= screen_width )
|
|
{
|
|
s_desired_append_char( s, L'\n', 0, 0, 0 );
|
|
prompt_width=0;
|
|
}
|
|
|
|
size_t i;
|
|
for( i=0; commandline[i]; i++ )
|
|
{
|
|
int col = c[i];
|
|
|
|
if( i == cursor_pos )
|
|
{
|
|
col = 0;
|
|
}
|
|
|
|
if( i == cursor_pos )
|
|
{
|
|
cursor_arr = s->desired.cursor;
|
|
}
|
|
|
|
s_desired_append_char( s, commandline[i], col, indent[i], prompt_width );
|
|
|
|
if( i== cursor_pos && s->desired.cursor.y != cursor_arr.y && commandline[i] != L'\n' )
|
|
{
|
|
/*
|
|
Ugh. We are placed exactly at the wrapping point of a
|
|
wrapped line, move cursor to the line below so the
|
|
cursor won't be on the ellipsis which looks
|
|
unintuitive.
|
|
*/
|
|
cursor_arr.x = s->desired.cursor.x - fish_wcwidth(commandline[i]);
|
|
cursor_arr.y = s->desired.cursor.y;
|
|
}
|
|
}
|
|
if( i == cursor_pos )
|
|
{
|
|
cursor_arr = s->desired.cursor;
|
|
}
|
|
|
|
s->desired.cursor = cursor_arr;
|
|
s_update( s, prompt );
|
|
s_save_status( s );
|
|
}
|
|
|
|
void s_reset( screen_t *s, bool reset_cursor )
|
|
{
|
|
CHECK( s, );
|
|
|
|
int prev_line = s->actual.cursor.y;
|
|
s->actual.resize(0);
|
|
s->actual.cursor.x = s->actual.cursor.y = 0;
|
|
s->actual_prompt = L"";
|
|
s->need_clear=1;
|
|
|
|
if( !reset_cursor )
|
|
{
|
|
/*
|
|
This should prevent reseting the cursor position during the
|
|
next repaint.
|
|
*/
|
|
write_loop( 1, "\r", 1 );
|
|
s->actual.cursor.y = prev_line;
|
|
}
|
|
fstat( 1, &s->prev_buff_1 );
|
|
fstat( 2, &s->prev_buff_2 );
|
|
}
|
|
|