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Support "alternate screen" mode (terminfo smcup/rmcup) typically used by full

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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
2009-07-14 06:40:33 +00:00
parent f41ef2198b
commit e63567d51c
6 changed files with 159 additions and 15 deletions
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76
input.c
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@@ -1,4 +1,4 @@
/* $Id: input.c,v 1.86 2009-06-25 16:21:32 nicm Exp $ */
/* $Id: input.c,v 1.87 2009-07-14 06:40:33 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -1151,7 +1151,10 @@ input_handle_sequence_el(struct input_ctx *ictx)
void
input_handle_sequence_sm(struct input_ctx *ictx)
{
uint16_t n;
struct window_pane *wp = ictx->wp;
struct screen *s = &wp->base;
u_int sx, sy;
uint16_t n;
if (ARRAY_LENGTH(&ictx->args) > 1)
return;
@@ -1172,6 +1175,29 @@ input_handle_sequence_sm(struct input_ctx *ictx)
screen_write_mousemode(&ictx->ctx, 1);
log_debug("mouse on");
break;
case 1049:
if (wp->saved_grid != NULL)
break;
sx = screen_size_x(s);
sy = screen_size_y(s);
/*
* Enter alternative screen mode. A copy of the visible
* screen is saved and the history is not updated
*/
wp->saved_grid = grid_create(sx, sy, 0);
grid_duplicate_lines(
wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
wp->saved_cx = s->cx;
wp->saved_cy = s->cy;
grid_view_clear(s->grid, 0, 0, sx, sy);
wp->base.grid->flags &= ~GRID_HISTORY;
wp->flags |= PANE_REDRAW;
break;
default:
log_debug("unknown SM [%hhu]: %u", ictx->private, n);
break;
@@ -1195,7 +1221,10 @@ input_handle_sequence_sm(struct input_ctx *ictx)
void
input_handle_sequence_rm(struct input_ctx *ictx)
{
uint16_t n;
struct window_pane *wp = ictx->wp;
struct screen *s = &wp->base;
u_int sx, sy;
uint16_t n;
if (ARRAY_LENGTH(&ictx->args) > 1)
return;
@@ -1216,6 +1245,47 @@ input_handle_sequence_rm(struct input_ctx *ictx)
screen_write_mousemode(&ictx->ctx, 0);
log_debug("mouse off");
break;
case 1049:
if (wp->saved_grid == NULL)
break;
sx = screen_size_x(s);
sy = screen_size_y(s);
/*
* Exit alternative screen mode and restore the copied
* grid.
*/
/*
* If the current size is bigger, temporarily resize
* to the old size before copying back.
*/
if (sy > wp->saved_grid->sy)
screen_resize(s, sx, wp->saved_grid->sy);
/* Restore the grid and cursor position. */
grid_duplicate_lines(
s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
s->cx = wp->saved_cx;
if (s->cx > screen_size_x(s) - 1)
s->cx = screen_size_x(s) - 1;
s->cy = wp->saved_cy;
if (s->cy > screen_size_y(s) - 1)
s->cy = screen_size_y(s) - 1;
/*
* Turn history back on (so resize can use it) and then
* resize back to the current size.
*/
wp->base.grid->flags |= GRID_HISTORY;
if (sy > wp->saved_grid->sy)
screen_resize(s, sx, sy);
grid_destroy(wp->saved_grid);
wp->saved_grid = NULL;
wp->flags |= PANE_REDRAW;
break;
default:
log_debug("unknown RM [%hhu]: %u", ictx->private, n);
break;