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	Move alternate screen into the screen rather than the pane.
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										86
									
								
								window.c
									
									
									
									
									
								
							
							
						
						
									
										86
									
								
								window.c
									
									
									
									
									
								
							@@ -879,10 +879,6 @@ window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
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	wp->pipe_off = 0;
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	wp->pipe_event = NULL;
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	wp->saved_grid = NULL;
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	wp->saved_cx = UINT_MAX;
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	wp->saved_cy = UINT_MAX;
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	screen_init(&wp->base, sx, sy, hlimit);
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	wp->screen = &wp->base;
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@@ -891,8 +887,6 @@ window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
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	if (gethostname(host, sizeof host) == 0)
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		screen_set_title(&wp->base, host);
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	wp->ictx = input_init(wp);
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	return (wp);
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}
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@@ -906,14 +900,12 @@ window_pane_destroy(struct window_pane *wp)
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		bufferevent_free(wp->event);
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		close(wp->fd);
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	}
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	input_free(wp->ictx);
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	if (wp->ictx != NULL)
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		input_free(wp->ictx);
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	screen_free(&wp->status_screen);
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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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	if (wp->pipe_fd != -1) {
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		bufferevent_free(wp->pipe_event);
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@@ -974,6 +966,7 @@ window_pane_set_event(struct window_pane *wp)
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	wp->event = bufferevent_new(wp->fd, window_pane_read_callback,
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	    NULL, window_pane_error_callback, wp);
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	wp->ictx = input_init(wp, wp->event);
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	bufferevent_setwatermark(wp->event, EV_READ, 0, READ_SIZE);
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	bufferevent_enable(wp->event, EV_READ|EV_WRITE);
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@@ -990,7 +983,7 @@ window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
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	wp->sy = sy;
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	log_debug("%s: %%%u resize %ux%u", __func__, wp->id, sx, sy);
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	screen_resize(&wp->base, sx, sy, wp->saved_grid == NULL);
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	screen_resize(&wp->base, sx, sy, wp->base.saved_grid == NULL);
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	wme = TAILQ_FIRST(&wp->modes);
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	if (wme != NULL && wme->mode->resize != NULL)
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@@ -999,90 +992,23 @@ window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
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	wp->flags |= (PANE_RESIZE|PANE_RESIZED);
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}
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/*
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 * Enter alternative screen mode. A copy of the visible screen is saved and the
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 * history is not updated
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 */
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void
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window_pane_alternate_on(struct window_pane *wp, struct grid_cell *gc,
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    int cursor)
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{
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	struct screen	*s = &wp->base;
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	u_int		 sx, sy;
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	if (wp->saved_grid != NULL)
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		return;
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	if (!options_get_number(wp->options, "alternate-screen"))
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		return;
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	sx = screen_size_x(s);
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	sy = screen_size_y(s);
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	wp->saved_grid = grid_create(sx, sy, 0);
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	grid_duplicate_lines(wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
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	if (cursor) {
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		wp->saved_cx = s->cx;
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		wp->saved_cy = s->cy;
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	}
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	memcpy(&wp->saved_cell, gc, sizeof wp->saved_cell);
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	grid_view_clear(s->grid, 0, 0, sx, sy, 8);
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	wp->base.grid->flags &= ~GRID_HISTORY;
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	screen_alternate_on(&wp->base, gc, cursor);
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	wp->flags |= PANE_REDRAW;
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}
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/* Exit alternate screen mode and restore the copied grid. */
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void
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window_pane_alternate_off(struct window_pane *wp, struct grid_cell *gc,
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    int cursor)
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{
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	struct screen	*s = &wp->base;
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	u_int		 sx, sy;
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	if (!options_get_number(wp->options, "alternate-screen"))
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		return;
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	/*
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	 * Restore the cursor position and cell. This happens even if not
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	 * currently in the alternate screen.
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	 */
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	if (cursor && wp->saved_cx != UINT_MAX && wp->saved_cy != UINT_MAX) {
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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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		memcpy(gc, &wp->saved_cell, sizeof *gc);
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	}
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	if (wp->saved_grid == NULL)
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		return;
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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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	 * If the current size is bigger, temporarily resize to the old size
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	 * 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, 1);
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	/* Restore the saved grid. */
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	grid_duplicate_lines(s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
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	/*
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	 * Turn history back on (so resize can use it) and then resize back to
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	 * 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 || sx != wp->saved_grid->sx)
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		screen_resize(s, sx, sy, 1);
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	grid_destroy(wp->saved_grid);
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	wp->saved_grid = NULL;
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	screen_alternate_off(&wp->base, gc, cursor);
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	wp->flags |= PANE_REDRAW;
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}
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