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Support "alternate screen" mode (terminfo smcup/rmcup) typically used by full
screen interactive programs to preserve the screen contents. When activated, it saves a copy of the visible grid and disables scrolling into and resizing out of the history; when deactivated the visible data is restored and the history reenabled.
This commit is contained in:
Nicholas Marriott
parent
f41ef2198b
commit
e63567d51c
@ -1,4 +1,4 @@
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/* $Id: grid-view.c,v 1.17 2009-07-09 18:04:53 nicm Exp $ */
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/* $Id: grid-view.c,v 1.18 2009-07-14 06:40:33 nicm Exp $ */
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/*
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* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -92,7 +92,7 @@ grid_view_scroll_region_up(struct grid *gd, u_int rupper, u_int rlower)
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{
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GRID_DEBUG(gd, "rupper=%u, rlower=%u", rupper, rlower);
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if (rupper == 0 && rlower == gd->sy - 1) {
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if (gd->flags & GRID_HISTORY && rupper == 0 && rlower == gd->sy - 1) {
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grid_scroll_line(gd);
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return;
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}
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48
grid.c
48
grid.c
@ -1,4 +1,4 @@
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/* $Id: grid.c,v 1.23 2009-07-14 06:38:14 nicm Exp $ */
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/* $Id: grid.c,v 1.24 2009-07-14 06:40:33 nicm Exp $ */
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/*
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* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -95,6 +95,8 @@ grid_create(u_int sx, u_int sy, u_int hlimit)
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gd->sx = sx;
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gd->sy = sy;
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gd->flags = GRID_HISTORY;
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gd->hsize = 0;
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gd->hlimit = hlimit;
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@ -517,3 +519,47 @@ grid_string_cells(struct grid *gd, u_int px, u_int py, u_int nx)
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buf[off] = '\0';
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return (buf);
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}
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/*
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* Duplicate a set of lines between two grids. If there aren't enough lines in
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* either source or destination, the number of lines is limited to the number
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* available.
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*/
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void
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grid_duplicate_lines(
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struct grid *dst, u_int dy, struct grid *src, u_int sy, u_int ny)
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{
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u_int yy;
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GRID_DEBUG(src, "dy=%u, sy=%u, ny=%u", dy, sy, ny);
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if (dy + ny > dst->hsize + dst->sy)
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ny = dst->hsize + dst->sy - dy;
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if (sy + ny > src->hsize + src->sy)
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ny = src->hsize + src->sy - sy;
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grid_clear_lines(dst, dy, ny);
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for (yy = 0; yy < ny; yy++) {
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dst->size[dy] = src->size[sy];
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if (src->size[sy] == 0)
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dst->data[dy] = NULL;
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else {
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dst->data[dy] = xcalloc(
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src->size[sy], sizeof **dst->data);
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memcpy(dst->data[dy], src->data[sy],
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src->size[sy] * (sizeof **dst->data));
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}
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dst->usize[dy] = src->usize[sy];
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if (src->usize[sy] == 0)
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dst->udata[dy] = NULL;
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else {
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dst->udata[sy] = xcalloc(
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src->usize[sy], sizeof **dst->udata);
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memcpy(dst->udata[dy], src->udata[sy],
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src->usize[sy] * (sizeof **dst->udata));
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}
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sy++; dy++;
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}
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}
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76
input.c
76
input.c
@ -1,4 +1,4 @@
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/* $Id: input.c,v 1.86 2009-06-25 16:21:32 nicm Exp $ */
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/* $Id: input.c,v 1.87 2009-07-14 06:40:33 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -1151,7 +1151,10 @@ input_handle_sequence_el(struct input_ctx *ictx)
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void
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input_handle_sequence_sm(struct input_ctx *ictx)
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{
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uint16_t n;
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struct window_pane *wp = ictx->wp;
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struct screen *s = &wp->base;
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u_int sx, sy;
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uint16_t n;
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if (ARRAY_LENGTH(&ictx->args) > 1)
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return;
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@ -1172,6 +1175,29 @@ input_handle_sequence_sm(struct input_ctx *ictx)
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screen_write_mousemode(&ictx->ctx, 1);
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log_debug("mouse on");
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break;
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case 1049:
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if (wp->saved_grid != NULL)
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break;
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sx = screen_size_x(s);
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sy = screen_size_y(s);
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/*
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* Enter alternative screen mode. A copy of the visible
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* screen is saved and the history is not updated
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*/
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wp->saved_grid = grid_create(sx, sy, 0);
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grid_duplicate_lines(
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wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
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wp->saved_cx = s->cx;
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wp->saved_cy = s->cy;
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grid_view_clear(s->grid, 0, 0, sx, sy);
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wp->base.grid->flags &= ~GRID_HISTORY;
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wp->flags |= PANE_REDRAW;
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break;
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default:
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log_debug("unknown SM [%hhu]: %u", ictx->private, n);
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break;
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@ -1195,7 +1221,10 @@ input_handle_sequence_sm(struct input_ctx *ictx)
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void
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input_handle_sequence_rm(struct input_ctx *ictx)
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{
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uint16_t n;
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struct window_pane *wp = ictx->wp;
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struct screen *s = &wp->base;
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u_int sx, sy;
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uint16_t n;
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if (ARRAY_LENGTH(&ictx->args) > 1)
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return;
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@ -1216,6 +1245,47 @@ input_handle_sequence_rm(struct input_ctx *ictx)
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screen_write_mousemode(&ictx->ctx, 0);
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log_debug("mouse off");
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break;
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case 1049:
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if (wp->saved_grid == NULL)
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break;
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sx = screen_size_x(s);
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sy = screen_size_y(s);
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/*
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* Exit alternative screen mode and restore the copied
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* grid.
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*/
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/*
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* If the current size is bigger, temporarily resize
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* to the old size before copying back.
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*/
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if (sy > wp->saved_grid->sy)
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screen_resize(s, sx, wp->saved_grid->sy);
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/* Restore the grid and cursor position. */
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grid_duplicate_lines(
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s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
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s->cx = wp->saved_cx;
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if (s->cx > screen_size_x(s) - 1)
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s->cx = screen_size_x(s) - 1;
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s->cy = wp->saved_cy;
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if (s->cy > screen_size_y(s) - 1)
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s->cy = screen_size_y(s) - 1;
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/*
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* Turn history back on (so resize can use it) and then
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* resize back to the current size.
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*/
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wp->base.grid->flags |= GRID_HISTORY;
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if (sy > wp->saved_grid->sy)
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screen_resize(s, sx, sy);
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grid_destroy(wp->saved_grid);
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wp->saved_grid = NULL;
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wp->flags |= PANE_REDRAW;
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break;
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default:
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log_debug("unknown RM [%hhu]: %u", ictx->private, n);
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break;
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28
screen.c
28
screen.c
@ -1,4 +1,4 @@
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/* $Id: screen.c,v 1.91 2009-07-12 17:03:11 nicm Exp $ */
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/* $Id: screen.c,v 1.92 2009-07-14 06:40:33 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -173,10 +173,20 @@ screen_resize_y(struct screen *s, u_int sy)
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needed -= available;
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/*
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* Now just increase the history size to take over the lines
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* which are left. XXX Should apply history limit?
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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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* XXX Should apply history limit?
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*/
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gd->hsize += needed;
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available = s->cy;
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if (gd->flags & GRID_HISTORY)
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gd->hsize += needed;
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else 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, 0, available);
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}
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s->cy -= needed;
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}
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@ -190,14 +200,18 @@ screen_resize_y(struct screen *s, u_int sy)
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if (sy > oldy) {
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needed = sy - oldy;
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/* Try to pull as much as possible out of the history. */
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/*
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* Try to pull as much as possible out of the history, if is
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* is enabled.
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*/
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available = gd->hsize;
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if (available > 0) {
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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->hsize -= available;
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s->cy += available;
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}
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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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12
tmux.h
12
tmux.h
@ -1,4 +1,4 @@
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/* $Id: tmux.h,v 1.358 2009-07-14 06:40:03 nicm Exp $ */
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/* $Id: tmux.h,v 1.359 2009-07-14 06:40:33 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -442,6 +442,9 @@ struct grid_utf8 {
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/* Entire grid of cells. */
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struct grid {
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int flags;
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#define GRID_HISTORY 0x1 /* scroll lines into history */
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u_int sx;
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u_int sy;
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@ -613,6 +616,11 @@ struct window_pane {
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struct screen *screen;
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struct screen base;
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/* Saved in alternative screen mode. */
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u_int saved_cx;
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u_int saved_cy;
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struct grid *saved_grid;
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const struct window_mode *mode;
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void *modedata;
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@ -1327,6 +1335,8 @@ void grid_clear_lines(struct grid *, u_int, u_int);
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void grid_move_lines(struct grid *, u_int, u_int, u_int);
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void grid_move_cells(struct grid *, u_int, u_int, u_int, u_int);
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char *grid_string_cells(struct grid *, u_int, u_int, u_int);
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void grid_duplicate_lines(
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struct grid *, u_int, struct grid *, u_int, u_int);
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/* grid-view.c */
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const struct grid_cell *grid_view_peek_cell(struct grid *, u_int, u_int);
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6
window.c
6
window.c
@ -1,4 +1,4 @@
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/* $Id: window.c,v 1.89 2009-07-08 18:03:03 nicm Exp $ */
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/* $Id: window.c,v 1.90 2009-07-14 06:40:33 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -405,6 +405,8 @@ window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
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wp->sx = sx;
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wp->sy = sy;
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wp->saved_grid = NULL;
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screen_init(&wp->base, sx, sy, hlimit);
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wp->screen = &wp->base;
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@ -423,6 +425,8 @@ window_pane_destroy(struct window_pane *wp)
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window_pane_reset_mode(wp);
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screen_free(&wp->base);
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if (wp->saved_grid != NULL)
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grid_destroy(wp->saved_grid);
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buffer_destroy(wp->in);
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buffer_destroy(wp->out);
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