mirror of
https://github.com/tmux/tmux.git
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d6883c0266
GitHub issue 4231.
739 lines
16 KiB
C
739 lines
16 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "tmux.h"
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/* Selected area in screen. */
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struct screen_sel {
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int hidden;
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int rectangle;
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int modekeys;
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u_int sx;
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u_int sy;
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u_int ex;
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u_int ey;
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struct grid_cell cell;
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};
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/* Entry on title stack. */
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struct screen_title_entry {
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char *text;
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TAILQ_ENTRY(screen_title_entry) entry;
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};
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TAILQ_HEAD(screen_titles, screen_title_entry);
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static void screen_resize_y(struct screen *, u_int, int, u_int *);
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static void screen_reflow(struct screen *, u_int, u_int *, u_int *, int);
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/* Free titles stack. */
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static void
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screen_free_titles(struct screen *s)
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{
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struct screen_title_entry *title_entry;
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if (s->titles == NULL)
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return;
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while ((title_entry = TAILQ_FIRST(s->titles)) != NULL) {
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TAILQ_REMOVE(s->titles, title_entry, entry);
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free(title_entry->text);
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free(title_entry);
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}
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free(s->titles);
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s->titles = NULL;
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}
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/* Create a new screen. */
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void
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screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
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{
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s->grid = grid_create(sx, sy, hlimit);
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s->saved_grid = NULL;
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s->title = xstrdup("");
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s->titles = NULL;
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s->path = NULL;
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s->cstyle = SCREEN_CURSOR_DEFAULT;
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s->default_cstyle = SCREEN_CURSOR_DEFAULT;
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s->mode = MODE_CURSOR;
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s->default_mode = 0;
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s->ccolour = -1;
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s->default_ccolour = -1;
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s->tabs = NULL;
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s->sel = NULL;
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s->write_list = NULL;
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s->hyperlinks = NULL;
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screen_reinit(s);
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}
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/* Reinitialise screen. */
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void
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screen_reinit(struct screen *s)
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{
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s->cx = 0;
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s->cy = 0;
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s->rupper = 0;
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s->rlower = screen_size_y(s) - 1;
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s->mode = MODE_CURSOR|MODE_WRAP|(s->mode & MODE_CRLF);
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if (options_get_number(global_options, "extended-keys") == 2)
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s->mode = (s->mode & ~EXTENDED_KEY_MODES)|MODE_KEYS_EXTENDED;
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if (SCREEN_IS_ALTERNATE(s))
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screen_alternate_off(s, NULL, 0);
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s->saved_cx = UINT_MAX;
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s->saved_cy = UINT_MAX;
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screen_reset_tabs(s);
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grid_clear_lines(s->grid, s->grid->hsize, s->grid->sy, 8);
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screen_clear_selection(s);
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screen_free_titles(s);
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screen_reset_hyperlinks(s);
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}
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/* Reset hyperlinks of a screen. */
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void
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screen_reset_hyperlinks(struct screen *s)
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{
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if (s->hyperlinks == NULL)
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s->hyperlinks = hyperlinks_init();
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else
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hyperlinks_reset(s->hyperlinks);
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}
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/* Destroy a screen. */
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void
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screen_free(struct screen *s)
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{
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free(s->sel);
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free(s->tabs);
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free(s->path);
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free(s->title);
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if (s->write_list != NULL)
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screen_write_free_list(s);
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if (SCREEN_IS_ALTERNATE(s))
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grid_destroy(s->saved_grid);
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grid_destroy(s->grid);
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if (s->hyperlinks != NULL)
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hyperlinks_free(s->hyperlinks);
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screen_free_titles(s);
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}
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/* Reset tabs to default, eight spaces apart. */
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void
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screen_reset_tabs(struct screen *s)
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{
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u_int i;
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free(s->tabs);
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if ((s->tabs = bit_alloc(screen_size_x(s))) == NULL)
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fatal("bit_alloc failed");
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for (i = 8; i < screen_size_x(s); i += 8)
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bit_set(s->tabs, i);
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}
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/* Set default cursor style and colour from options. */
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void
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screen_set_default_cursor(struct screen *s, struct options *oo)
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{
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int c;
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c = options_get_number(oo, "cursor-colour");
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s->default_ccolour = c;
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c = options_get_number(oo, "cursor-style");
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s->default_mode = 0;
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screen_set_cursor_style(c, &s->default_cstyle, &s->default_mode);
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}
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/* Set screen cursor style and mode. */
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void
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screen_set_cursor_style(u_int style, enum screen_cursor_style *cstyle,
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int *mode)
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{
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switch (style) {
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case 0:
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*cstyle = SCREEN_CURSOR_DEFAULT;
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break;
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case 1:
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*cstyle = SCREEN_CURSOR_BLOCK;
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*mode |= MODE_CURSOR_BLINKING;
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break;
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case 2:
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*cstyle = SCREEN_CURSOR_BLOCK;
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*mode &= ~MODE_CURSOR_BLINKING;
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break;
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case 3:
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*cstyle = SCREEN_CURSOR_UNDERLINE;
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*mode |= MODE_CURSOR_BLINKING;
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break;
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case 4:
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*cstyle = SCREEN_CURSOR_UNDERLINE;
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*mode &= ~MODE_CURSOR_BLINKING;
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break;
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case 5:
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*cstyle = SCREEN_CURSOR_BAR;
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*mode |= MODE_CURSOR_BLINKING;
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break;
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case 6:
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*cstyle = SCREEN_CURSOR_BAR;
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*mode &= ~MODE_CURSOR_BLINKING;
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break;
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}
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}
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/* Set screen cursor colour. */
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void
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screen_set_cursor_colour(struct screen *s, int colour)
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{
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s->ccolour = colour;
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}
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/* Set screen title. */
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int
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screen_set_title(struct screen *s, const char *title)
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{
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if (!utf8_isvalid(title))
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return (0);
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free(s->title);
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s->title = xstrdup(title);
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return (1);
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}
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/* Set screen path. */
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void
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screen_set_path(struct screen *s, const char *path)
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{
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free(s->path);
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utf8_stravis(&s->path, path, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
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}
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/* Push the current title onto the stack. */
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void
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screen_push_title(struct screen *s)
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{
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struct screen_title_entry *title_entry;
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if (s->titles == NULL) {
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s->titles = xmalloc(sizeof *s->titles);
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TAILQ_INIT(s->titles);
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}
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title_entry = xmalloc(sizeof *title_entry);
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title_entry->text = xstrdup(s->title);
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TAILQ_INSERT_HEAD(s->titles, title_entry, entry);
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}
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/*
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* Pop a title from the stack and set it as the screen title. If the stack is
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* empty, do nothing.
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*/
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void
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screen_pop_title(struct screen *s)
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{
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struct screen_title_entry *title_entry;
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if (s->titles == NULL)
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return;
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title_entry = TAILQ_FIRST(s->titles);
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if (title_entry != NULL) {
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screen_set_title(s, title_entry->text);
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TAILQ_REMOVE(s->titles, title_entry, entry);
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free(title_entry->text);
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free(title_entry);
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}
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}
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/* Resize screen with options. */
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void
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screen_resize_cursor(struct screen *s, u_int sx, u_int sy, int reflow,
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int eat_empty, int cursor)
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{
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u_int cx = s->cx, cy = s->grid->hsize + s->cy;
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if (s->write_list != NULL)
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screen_write_free_list(s);
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log_debug("%s: new size %ux%u, now %ux%u (cursor %u,%u = %u,%u)",
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__func__, sx, sy, screen_size_x(s), screen_size_y(s), s->cx, s->cy,
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cx, cy);
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if (sx < 1)
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sx = 1;
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if (sy < 1)
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sy = 1;
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if (sx != screen_size_x(s)) {
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s->grid->sx = sx;
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screen_reset_tabs(s);
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} else
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reflow = 0;
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if (sy != screen_size_y(s))
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screen_resize_y(s, sy, eat_empty, &cy);
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if (reflow)
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screen_reflow(s, sx, &cx, &cy, cursor);
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if (cy >= s->grid->hsize) {
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s->cx = cx;
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s->cy = cy - s->grid->hsize;
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} else {
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s->cx = 0;
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s->cy = 0;
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}
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log_debug("%s: cursor finished at %u,%u = %u,%u", __func__, s->cx,
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s->cy, cx, cy);
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if (s->write_list != NULL)
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screen_write_make_list(s);
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}
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/* Resize screen. */
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void
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screen_resize(struct screen *s, u_int sx, u_int sy, int reflow)
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{
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screen_resize_cursor(s, sx, sy, reflow, 1, 1);
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}
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static void
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screen_resize_y(struct screen *s, u_int sy, int eat_empty, u_int *cy)
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{
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struct grid *gd = s->grid;
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u_int needed, available, oldy, i;
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if (sy == 0)
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fatalx("zero size");
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oldy = screen_size_y(s);
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/*
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* When resizing:
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*
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* If the height is decreasing, delete lines from the bottom until
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* hitting the cursor, then push lines from the top into the history.
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*
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* When increasing, pull as many lines as possible from scrolled
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* history (not explicitly cleared from view) to the top, then fill the
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* remaining with blanks at the bottom.
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*/
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/* Size decreasing. */
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if (sy < oldy) {
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needed = oldy - sy;
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/* Delete as many lines as possible from the bottom. */
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if (eat_empty) {
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available = oldy - 1 - s->cy;
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if (available > 0) {
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if (available > needed)
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available = needed;
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grid_view_delete_lines(gd, oldy - available,
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available, 8);
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}
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needed -= available;
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}
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/*
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* Now just increase the history size, if possible, to take
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* over the lines which are left. If history is off, delete
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* lines from the top.
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*/
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available = s->cy;
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if (gd->flags & GRID_HISTORY) {
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gd->hscrolled += needed;
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gd->hsize += needed;
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} else if (needed > 0 && available > 0) {
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if (available > needed)
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available = needed;
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grid_view_delete_lines(gd, 0, available, 8);
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(*cy) -= available;
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}
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}
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/* Resize line array. */
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grid_adjust_lines(gd, gd->hsize + sy);
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/* Size increasing. */
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if (sy > oldy) {
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needed = sy - oldy;
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/*
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* Try to pull as much as possible out of scrolled history, if
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* it is enabled.
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*/
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available = gd->hscrolled;
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if (gd->flags & GRID_HISTORY && available > 0) {
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if (available > needed)
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available = needed;
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gd->hscrolled -= available;
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gd->hsize -= available;
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} else
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available = 0;
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needed -= available;
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/* Then fill the rest in with blanks. */
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for (i = gd->hsize + sy - needed; i < gd->hsize + sy; i++)
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grid_empty_line(gd, i, 8);
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}
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/* Set the new size, and reset the scroll region. */
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gd->sy = sy;
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s->rupper = 0;
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s->rlower = screen_size_y(s) - 1;
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}
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/* Set selection. */
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void
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screen_set_selection(struct screen *s, u_int sx, u_int sy,
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u_int ex, u_int ey, u_int rectangle, int modekeys, struct grid_cell *gc)
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{
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if (s->sel == NULL)
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s->sel = xcalloc(1, sizeof *s->sel);
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memcpy(&s->sel->cell, gc, sizeof s->sel->cell);
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s->sel->hidden = 0;
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s->sel->rectangle = rectangle;
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s->sel->modekeys = modekeys;
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s->sel->sx = sx;
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s->sel->sy = sy;
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s->sel->ex = ex;
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s->sel->ey = ey;
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}
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/* Clear selection. */
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void
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screen_clear_selection(struct screen *s)
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{
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free(s->sel);
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s->sel = NULL;
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}
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/* Hide selection. */
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void
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screen_hide_selection(struct screen *s)
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{
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if (s->sel != NULL)
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s->sel->hidden = 1;
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}
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/* Check if cell in selection. */
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int
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screen_check_selection(struct screen *s, u_int px, u_int py)
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{
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struct screen_sel *sel = s->sel;
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u_int xx;
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if (sel == NULL || sel->hidden)
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return (0);
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if (sel->rectangle) {
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if (sel->sy < sel->ey) {
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/* start line < end line -- downward selection. */
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if (py < sel->sy || py > sel->ey)
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return (0);
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} else if (sel->sy > sel->ey) {
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/* start line > end line -- upward selection. */
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if (py > sel->sy || py < sel->ey)
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return (0);
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} else {
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/* starting line == ending line. */
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if (py != sel->sy)
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return (0);
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}
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/*
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* Need to include the selection start row, but not the cursor
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* row, which means the selection changes depending on which
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* one is on the left.
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*/
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if (sel->ex < sel->sx) {
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/* Cursor (ex) is on the left. */
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if (px < sel->ex)
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return (0);
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if (px > sel->sx)
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return (0);
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} else {
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/* Selection start (sx) is on the left. */
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if (px < sel->sx)
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return (0);
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if (px > sel->ex)
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return (0);
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}
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} else {
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/*
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* Like emacs, keep the top-left-most character, and drop the
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* bottom-right-most, regardless of copy direction.
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*/
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if (sel->sy < sel->ey) {
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/* starting line < ending line -- downward selection. */
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if (py < sel->sy || py > sel->ey)
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return (0);
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if (py == sel->sy && px < sel->sx)
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return (0);
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if (sel->modekeys == MODEKEY_EMACS)
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xx = (sel->ex == 0 ? 0 : sel->ex - 1);
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else
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xx = sel->ex;
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if (py == sel->ey && px > xx)
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return (0);
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} else if (sel->sy > sel->ey) {
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/* starting line > ending line -- upward selection. */
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if (py > sel->sy || py < sel->ey)
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return (0);
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if (py == sel->ey && px < sel->ex)
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return (0);
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if (sel->modekeys == MODEKEY_EMACS)
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xx = sel->sx - 1;
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else
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xx = sel->sx;
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if (py == sel->sy && (sel->sx == 0 || px > xx))
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return (0);
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} else {
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/* starting line == ending line. */
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if (py != sel->sy)
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return (0);
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if (sel->ex < sel->sx) {
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/* cursor (ex) is on the left */
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if (sel->modekeys == MODEKEY_EMACS)
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xx = sel->sx - 1;
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else
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xx = sel->sx;
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if (px > xx || px < sel->ex)
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return (0);
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} else {
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/* selection start (sx) is on the left */
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if (sel->modekeys == MODEKEY_EMACS)
|
|
xx = (sel->ex == 0 ? 0 : sel->ex - 1);
|
|
else
|
|
xx = sel->ex;
|
|
if (px < sel->sx || px > xx)
|
|
return (0);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
/* Get selected grid cell. */
|
|
void
|
|
screen_select_cell(struct screen *s, struct grid_cell *dst,
|
|
const struct grid_cell *src)
|
|
{
|
|
if (s->sel == NULL || s->sel->hidden)
|
|
return;
|
|
|
|
memcpy(dst, &s->sel->cell, sizeof *dst);
|
|
|
|
utf8_copy(&dst->data, &src->data);
|
|
dst->attr = dst->attr & ~GRID_ATTR_CHARSET;
|
|
dst->attr |= src->attr & GRID_ATTR_CHARSET;
|
|
dst->flags = src->flags;
|
|
}
|
|
|
|
/* Reflow wrapped lines. */
|
|
static void
|
|
screen_reflow(struct screen *s, u_int new_x, u_int *cx, u_int *cy, int cursor)
|
|
{
|
|
u_int wx, wy;
|
|
|
|
if (cursor) {
|
|
grid_wrap_position(s->grid, *cx, *cy, &wx, &wy);
|
|
log_debug("%s: cursor %u,%u is %u,%u", __func__, *cx, *cy, wx,
|
|
wy);
|
|
}
|
|
|
|
grid_reflow(s->grid, new_x);
|
|
|
|
if (cursor) {
|
|
grid_unwrap_position(s->grid, cx, cy, wx, wy);
|
|
log_debug("%s: new cursor is %u,%u", __func__, *cx, *cy);
|
|
}
|
|
else {
|
|
*cx = 0;
|
|
*cy = s->grid->hsize;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Enter alternative screen mode. A copy of the visible screen is saved and the
|
|
* history is not updated.
|
|
*/
|
|
void
|
|
screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)
|
|
{
|
|
u_int sx, sy;
|
|
|
|
if (SCREEN_IS_ALTERNATE(s))
|
|
return;
|
|
sx = screen_size_x(s);
|
|
sy = screen_size_y(s);
|
|
|
|
s->saved_grid = grid_create(sx, sy, 0);
|
|
grid_duplicate_lines(s->saved_grid, 0, s->grid, screen_hsize(s), sy);
|
|
if (cursor) {
|
|
s->saved_cx = s->cx;
|
|
s->saved_cy = s->cy;
|
|
}
|
|
memcpy(&s->saved_cell, gc, sizeof s->saved_cell);
|
|
|
|
grid_view_clear(s->grid, 0, 0, sx, sy, 8);
|
|
|
|
s->saved_flags = s->grid->flags;
|
|
s->grid->flags &= ~GRID_HISTORY;
|
|
}
|
|
|
|
/* Exit alternate screen mode and restore the copied grid. */
|
|
void
|
|
screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
|
|
{
|
|
u_int sx = screen_size_x(s), sy = screen_size_y(s);
|
|
|
|
/*
|
|
* If the current size is different, temporarily resize to the old size
|
|
* before copying back.
|
|
*/
|
|
if (SCREEN_IS_ALTERNATE(s))
|
|
screen_resize(s, s->saved_grid->sx, s->saved_grid->sy, 0);
|
|
|
|
/*
|
|
* Restore the cursor position and cell. This happens even if not
|
|
* currently in the alternate screen.
|
|
*/
|
|
if (cursor && s->saved_cx != UINT_MAX && s->saved_cy != UINT_MAX) {
|
|
s->cx = s->saved_cx;
|
|
s->cy = s->saved_cy;
|
|
if (gc != NULL)
|
|
memcpy(gc, &s->saved_cell, sizeof *gc);
|
|
}
|
|
|
|
/* If not in the alternate screen, do nothing more. */
|
|
if (!SCREEN_IS_ALTERNATE(s)) {
|
|
if (s->cx > screen_size_x(s) - 1)
|
|
s->cx = screen_size_x(s) - 1;
|
|
if (s->cy > screen_size_y(s) - 1)
|
|
s->cy = screen_size_y(s) - 1;
|
|
return;
|
|
}
|
|
|
|
/* Restore the saved grid. */
|
|
grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0,
|
|
s->saved_grid->sy);
|
|
|
|
/*
|
|
* Turn history back on (so resize can use it) and then resize back to
|
|
* the current size.
|
|
*/
|
|
if (s->saved_flags & GRID_HISTORY)
|
|
s->grid->flags |= GRID_HISTORY;
|
|
screen_resize(s, sx, sy, 1);
|
|
|
|
grid_destroy(s->saved_grid);
|
|
s->saved_grid = NULL;
|
|
|
|
if (s->cx > screen_size_x(s) - 1)
|
|
s->cx = screen_size_x(s) - 1;
|
|
if (s->cy > screen_size_y(s) - 1)
|
|
s->cy = screen_size_y(s) - 1;
|
|
}
|
|
|
|
/* Get mode as a string. */
|
|
const char *
|
|
screen_mode_to_string(int mode)
|
|
{
|
|
static char tmp[1024];
|
|
|
|
if (mode == 0)
|
|
return ("NONE");
|
|
if (mode == ALL_MODES)
|
|
return ("ALL");
|
|
|
|
*tmp = '\0';
|
|
if (mode & MODE_CURSOR)
|
|
strlcat(tmp, "CURSOR,", sizeof tmp);
|
|
if (mode & MODE_INSERT)
|
|
strlcat(tmp, "INSERT,", sizeof tmp);
|
|
if (mode & MODE_KCURSOR)
|
|
strlcat(tmp, "KCURSOR,", sizeof tmp);
|
|
if (mode & MODE_KKEYPAD)
|
|
strlcat(tmp, "KKEYPAD,", sizeof tmp);
|
|
if (mode & MODE_WRAP)
|
|
strlcat(tmp, "WRAP,", sizeof tmp);
|
|
if (mode & MODE_MOUSE_STANDARD)
|
|
strlcat(tmp, "MOUSE_STANDARD,", sizeof tmp);
|
|
if (mode & MODE_MOUSE_BUTTON)
|
|
strlcat(tmp, "MOUSE_BUTTON,", sizeof tmp);
|
|
if (mode & MODE_CURSOR_BLINKING)
|
|
strlcat(tmp, "CURSOR_BLINKING,", sizeof tmp);
|
|
if (mode & MODE_CURSOR_VERY_VISIBLE)
|
|
strlcat(tmp, "CURSOR_VERY_VISIBLE,", sizeof tmp);
|
|
if (mode & MODE_MOUSE_UTF8)
|
|
strlcat(tmp, "MOUSE_UTF8,", sizeof tmp);
|
|
if (mode & MODE_MOUSE_SGR)
|
|
strlcat(tmp, "MOUSE_SGR,", sizeof tmp);
|
|
if (mode & MODE_BRACKETPASTE)
|
|
strlcat(tmp, "BRACKETPASTE,", sizeof tmp);
|
|
if (mode & MODE_FOCUSON)
|
|
strlcat(tmp, "FOCUSON,", sizeof tmp);
|
|
if (mode & MODE_MOUSE_ALL)
|
|
strlcat(tmp, "MOUSE_ALL,", sizeof tmp);
|
|
if (mode & MODE_ORIGIN)
|
|
strlcat(tmp, "ORIGIN,", sizeof tmp);
|
|
if (mode & MODE_CRLF)
|
|
strlcat(tmp, "CRLF,", sizeof tmp);
|
|
if (mode & MODE_KEYS_EXTENDED)
|
|
strlcat(tmp, "KEYS_EXTENDED,", sizeof tmp);
|
|
if (mode & MODE_KEYS_EXTENDED_2)
|
|
strlcat(tmp, "KEYS_EXTENDED_2,", sizeof tmp);
|
|
tmp[strlen(tmp) - 1] = '\0';
|
|
return (tmp);
|
|
}
|