diff options
Diffstat (limited to 'usr.bin/tmux/screen.c')
| -rw-r--r-- | usr.bin/tmux/screen.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/usr.bin/tmux/screen.c b/usr.bin/tmux/screen.c new file mode 100644 index 00000000000..028653b56c4 --- /dev/null +++ b/usr.bin/tmux/screen.c @@ -0,0 +1,240 @@ +/* $OpenBSD: screen.c,v 1.1 2009/06/01 22:58:49 nicm Exp $ */ + +/* + * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER + * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/types.h> + +#include <string.h> + +#include "tmux.h" + +void screen_resize_x(struct screen *, u_int); +void screen_resize_y(struct screen *, u_int); + +/* Create a new screen. */ +void +screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit) +{ + s->grid = grid_create(sx, sy, hlimit); + + s->title = xstrdup(""); + + screen_reinit(s); +} + +/* Reinitialise screen. */ +void +screen_reinit(struct screen *s) +{ + s->cx = 0; + s->cy = 0; + + s->rupper = 0; + s->rlower = screen_size_y(s) - 1; + + s->mode = MODE_CURSOR; + + grid_clear_lines(s->grid, s->grid->hsize, s->grid->sy - 1); + + screen_clear_selection(s); +} + +/* Destroy a screen. */ +void +screen_free(struct screen *s) +{ + xfree(s->title); + grid_destroy(s->grid); +} + +/* Set screen title. */ +void +screen_set_title(struct screen *s, const char *title) +{ + xfree(s->title); + s->title = xstrdup(title); +} + +/* Resize screen. */ +void +screen_resize(struct screen *s, u_int sx, u_int sy) +{ + if (sx < 1) + sx = 1; + if (sy < 1) + sy = 1; + + if (sx != screen_size_x(s)) + screen_resize_x(s, sx); + if (sy != screen_size_y(s)) + screen_resize_y(s, sy); +} + +void +screen_resize_x(struct screen *s, u_int sx) +{ + struct grid *gd = s->grid; + const struct grid_cell *gc; + const struct grid_utf8 *gu; + u_int xx, yy; + + if (sx == 0) + fatalx("zero size"); + + /* If getting larger, not much to do. */ + if (sx > screen_size_x(s)) { + gd->sx = sx; + return; + } + + /* If getting smaller, nuke any data in lines over the new size. */ + for (yy = gd->hsize; yy < gd->hsize + screen_size_y(s); yy++) { + /* + * If the character after the last is wide or padding, remove + * it and any leading padding. + */ + gc = &grid_default_cell; + for (xx = sx; xx > 0; xx--) { + gc = grid_peek_cell(gd, xx - 1, yy); + if (!(gc->flags & GRID_FLAG_PADDING)) + break; + grid_set_cell(gd, xx - 1, yy, &grid_default_cell); + } + if (xx > 0 && xx != sx && gc->flags & GRID_FLAG_UTF8) { + gu = grid_peek_utf8(gd, xx - 1, yy); + if (gu->width > 1) { + grid_set_cell( + gd, xx - 1, yy, &grid_default_cell); + } + } + + /* Reduce the line size. */ + grid_reduce_line(gd, yy, sx); + } + + if (s->cx >= sx) + s->cx = sx - 1; + gd->sx = sx; +} + +void +screen_resize_y(struct screen *s, u_int sy) +{ + struct grid *gd = s->grid; + u_int oy, yy, ny; + + if (sy == 0) + fatalx("zero size"); + + /* Size decreasing. */ + if (sy < screen_size_y(s)) { + oy = screen_size_y(s); + + if (s->cy != 0) { + /* + * The cursor is not at the start. Try to remove as + * many lines as possible from the top. (Up to the + * cursor line.) + */ + ny = s->cy; + if (ny > oy - sy) + ny = oy - sy; + + grid_view_delete_lines(gd, 0, ny); + + s->cy -= ny; + oy -= ny; + } + + if (sy < oy) { + /* Remove any remaining lines from the bottom. */ + grid_view_delete_lines(gd, sy, oy - sy); + if (s->cy >= sy) + s->cy = sy - 1; + } + } + + /* Resize line arrays. */ + gd->size = xrealloc(gd->size, gd->hsize + sy, sizeof *gd->size); + gd->data = xrealloc(gd->data, gd->hsize + sy, sizeof *gd->data); + gd->usize = xrealloc(gd->usize, gd->hsize + sy, sizeof *gd->usize); + gd->udata = xrealloc(gd->udata, gd->hsize + sy, sizeof *gd->udata); + + /* Size increasing. */ + if (sy > screen_size_y(s)) { + oy = screen_size_y(s); + for (yy = gd->hsize + oy; yy < gd->hsize + sy; yy++) { + gd->size[yy] = 0; + gd->data[yy] = NULL; + gd->usize[yy] = 0; + gd->udata[yy] = NULL; + } + } + + gd->sy = sy; + + s->rupper = 0; + s->rlower = screen_size_y(s) - 1; +} + +/* Set selection. */ +void +screen_set_selection(struct screen *s, + u_int sx, u_int sy, u_int ex, u_int ey, struct grid_cell *gc) +{ + struct screen_sel *sel = &s->sel; + + memcpy(&sel->cell, gc, sizeof sel->cell); + + sel->flag = 1; + if (ey < sy || (sy == ey && ex < sx)) { + sel->sx = ex; sel->sy = ey; + sel->ex = sx; sel->ey = sy; + } else { + sel->sx = sx; sel->sy = sy; + sel->ex = ex; sel->ey = ey; + } +} + +/* Clear selection. */ +void +screen_clear_selection(struct screen *s) +{ + struct screen_sel *sel = &s->sel; + + sel->flag = 0; +} + +/* Check if cell in selection. */ +int +screen_check_selection(struct screen *s, u_int px, u_int py) +{ + struct screen_sel *sel = &s->sel; + + if (!sel->flag || py < sel->sy || py > sel->ey) + return (0); + + if (py == sel->sy && py == sel->ey) { + if (px < sel->sx || px > sel->ex) + return (0); + return (1); + } + + if ((py == sel->sy && px < sel->sx) || (py == sel->ey && px > sel->ex)) + return (0); + return (1); +} |