Move alternate screen into the screen rather than the pane.

7 files changed, 127 insertions, 107 deletions

diff --git a/cmd-capture-pane.c b/cmd-capture-pane.c
index 2c8dd920..ad6755ba 100644
--- a/cmd-capture-pane.c
+++ b/cmd-capture-pane.c
@@ -118,7 +118,7 @@ cmd_capture_pane_history(struct args *args, struct cmdq_item *item,
 
 	sx = screen_size_x(&wp->base);
 	if (args_has(args, 'a')) {
-		gd = wp->saved_grid;
+		gd = wp->base.saved_grid;
 		if (gd == NULL) {
 			if (!args_has(args, 'q')) {
 				cmdq_error(item, "no alternate screen");
diff --git a/format.c b/format.c
index 630e75d6..15347e18 100644
--- a/format.c
+++ b/format.c
@@ -2729,9 +2729,11 @@ format_defaults_pane(struct format_tree *ft, struct window_pane *wp)
 	format_add(ft, "scroll_region_upper", "%u", wp->base.rupper);
 	format_add(ft, "scroll_region_lower", "%u", wp->base.rlower);
 
-	format_add(ft, "alternate_on", "%d", wp->saved_grid ? 1 : 0);
-	format_add(ft, "alternate_saved_x", "%u", wp->saved_cx);
-	format_add(ft, "alternate_saved_y", "%u", wp->saved_cy);
+	format_add(ft, "alternate_on", "%d", wp->base.saved_grid != NULL);
+	if (wp->base.saved_cx != UINT_MAX)
+		format_add(ft, "alternate_saved_x", "%u", wp->base.saved_cx);
+	if (wp->base.saved_cy != UINT_MAX)
+		format_add(ft, "alternate_saved_y", "%u", wp->base.saved_cy);
 
 	format_add(ft, "cursor_flag", "%d",
 	    !!(wp->base.mode & MODE_CURSOR));
diff --git a/input.c b/input.c
index c7d67b82..4901e886 100644
--- a/input.c
+++ b/input.c
@@ -75,6 +75,7 @@ struct input_param {
 /* Input parser context. */
 struct input_ctx {
 	struct window_pane     *wp;
+	struct bufferevent     *event;
 	struct screen_write_ctx ctx;
 
 	struct input_cell	cell;
@@ -788,12 +789,13 @@ input_restore_state(struct input_ctx *ictx)
 
 /* Initialise input parser. */
 struct input_ctx *
-input_init(struct window_pane *wp)
+input_init(struct window_pane *wp, struct bufferevent *bev)
 {
 	struct input_ctx	*ictx;
 
 	ictx = xcalloc(1, sizeof *ictx);
 	ictx->wp = wp;
+	ictx->event = bev;
 
 	ictx->input_space = INPUT_BUF_START;
 	ictx->input_buf = xmalloc(INPUT_BUF_START);
@@ -1058,18 +1060,15 @@ input_get(struct input_ctx *ictx, u_int validx, int minval, int defval)
 static void
 input_reply(struct input_ctx *ictx, const char *fmt, ...)
 {
-	struct window_pane	*wp = ictx->wp;
+	struct bufferevent	*bev = ictx->event;
 	va_list			 ap;
 	char			*reply;
 
-	if (wp == NULL)
-		return;
-
 	va_start(ap, fmt);
 	xvasprintf(&reply, fmt, ap);
 	va_end(ap);
 
-	bufferevent_write(wp->event, reply, strlen(reply));
+	bufferevent_write(bev, reply, strlen(reply));
 	free(reply);
 }
 
@@ -1680,10 +1679,14 @@ input_csi_dispatch_rm_private(struct input_ctx *ictx)
 		case 1047:
 			if (wp != NULL)
 				window_pane_alternate_off(wp, gc, 0);
+			else
+				screen_alternate_off(sctx->s, gc, 0);
 			break;
 		case 1049:
 			if (wp != NULL)
 				window_pane_alternate_off(wp, gc, 1);
+			else
+				screen_alternate_off(sctx->s, gc, 1);
 			break;
 		case 2004:
 			screen_write_mode_clear(sctx, MODE_BRACKETPASTE);
@@ -1781,10 +1784,14 @@ input_csi_dispatch_sm_private(struct input_ctx *ictx)
 		case 1047:
 			if (wp != NULL)
 				window_pane_alternate_on(wp, gc, 0);
+			else
+				screen_alternate_on(sctx->s, gc, 0);
 			break;
 		case 1049:
 			if (wp != NULL)
 				window_pane_alternate_on(wp, gc, 1);
+			else
+				screen_alternate_on(sctx->s, gc, 1);
 			break;
 		case 2004:
 			screen_write_mode_set(sctx, MODE_BRACKETPASTE);
@@ -1801,7 +1808,9 @@ static void
 input_csi_dispatch_winops(struct input_ctx *ictx)
 {
 	struct screen_write_ctx	*sctx = &ictx->ctx;
+	struct screen		*s = sctx->s;
 	struct window_pane	*wp = ictx->wp;
+	u_int			 x = screen_size_x(s), y = screen_size_y(s);
 	int			 n, m;
 
 	m = 0;
@@ -1858,10 +1867,7 @@ input_csi_dispatch_winops(struct input_ctx *ictx)
 			}
 			break;
 		case 18:
-			if (wp != NULL) {
-				input_reply(ictx, "\033[8;%u;%ut", wp->sy,
-				    wp->sx);
-			}
+			input_reply(ictx, "\033[8;%u;%ut", x, y);
 			break;
 		default:
 			log_debug("%s: unknown '%c'", __func__, ictx->ch);
@@ -2565,13 +2571,13 @@ input_osc_52(struct input_ctx *ictx, const char *p)
 			outlen = 0;
 			out = NULL;
 		}
-		bufferevent_write(wp->event, "\033]52;;", 6);
+		bufferevent_write(ictx->event, "\033]52;;", 6);
 		if (outlen != 0)
-			bufferevent_write(wp->event, out, outlen);
+			bufferevent_write(ictx->event, out, outlen);
 		if (ictx->input_end == INPUT_END_BEL)
-			bufferevent_write(wp->event, "\007", 1);
+			bufferevent_write(ictx->event, "\007", 1);
 		else
-			bufferevent_write(wp->event, "\033\\", 2);
+			bufferevent_write(ictx->event, "\033\\", 2);
 		free(out);
 		return;
 	}
diff --git a/screen.c b/screen.c
index b8acf33d..c3e5da70 100644
--- a/screen.c
+++ b/screen.c
@@ -76,6 +76,8 @@ void
 screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
 {
 	s->grid = grid_create(sx, sy, hlimit);
+	s->saved_grid = NULL;
+
 	s->title = xstrdup("");
 	s->titles = NULL;
 
@@ -99,6 +101,11 @@ screen_reinit(struct screen *s)
 
 	s->mode = MODE_CURSOR | MODE_WRAP;
 
+	if (s->saved_grid != NULL)
+		screen_alternate_off(s, NULL, 0);
+	s->saved_cx = UINT_MAX;
+	s->saved_cy = UINT_MAX;
+
 	screen_reset_tabs(s);
 
 	grid_clear_lines(s->grid, s->grid->hsize, s->grid->sy, 8);
@@ -116,6 +123,8 @@ screen_free(struct screen *s)
 	free(s->title);
 	free(s->ccolour);
 
+	if (s->saved_grid != NULL)
+		grid_destroy(s->saved_grid);
 	grid_destroy(s->grid);
 
 	screen_free_titles(s);
@@ -502,3 +511,78 @@ screen_reflow(struct screen *s, u_int new_x)
 	log_debug("%s: reflow took %llu.%06u seconds", __func__,
 	    (unsigned long long)tv.tv_sec, (u_int)tv.tv_usec);
 }
+
+/*
+ * 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 (s->saved_grid != NULL)
+		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->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, sy;
+
+	/*
+	 * 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;
+		if (s->cx > screen_size_x(s) - 1)
+			s->cx = screen_size_x(s) - 1;
+		s->cy = s->saved_cy;
+		if (s->cy > screen_size_y(s) - 1)
+			s->cy = screen_size_y(s) - 1;
+		if (gc != NULL)
+			memcpy(gc, &s->saved_cell, sizeof *gc);
+	}
+
+	if (s->saved_grid == NULL)
+		return;
+	sx = screen_size_x(s);
+	sy = screen_size_y(s);
+
+	/*
+	 * If the current size is bigger, temporarily resize to the old size
+	 * before copying back.
+	 */
+	if (sy > s->saved_grid->sy)
+		screen_resize(s, sx, s->saved_grid->sy, 1);
+
+	/* Restore the saved grid. */
+	grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0, sy);
+
+	/*
+	 * Turn history back on (so resize can use it) and then resize back to
+	 * the current size.
+	 */
+	s->grid->flags |= GRID_HISTORY;
+	if (sy > s->saved_grid->sy || sx != s->saved_grid->sx)
+		screen_resize(s, sx, sy, 1);
+
+	grid_destroy(s->saved_grid);
+	s->saved_grid = NULL;
+}
diff --git a/server-client.c b/server-client.c
index cd33b547..75e80c81 100644
--- a/server-client.c
+++ b/server-client.c
@@ -1400,7 +1400,7 @@ server_client_resize_event(__unused int fd, __unused short events, void *data)
 	log_debug("%s: %%%u timer fired (was%s resized)", __func__, wp->id,
 	    (wp->flags & PANE_RESIZED) ? "" : " not");
 
-	if (wp->saved_grid == NULL && (wp->flags & PANE_RESIZED)) {
+	if (wp->base.saved_grid == NULL && (wp->flags & PANE_RESIZED)) {
 		log_debug("%s: %%%u deferring timer", __func__, wp->id);
 		server_client_start_resize_timer(wp);
 	} else if (!server_client_resize_force(wp)) {
diff --git a/tmux.h b/tmux.h
index e40dfe34..2e6ef0c1 100644
--- a/tmux.h
+++ b/tmux.h
@@ -754,8 +754,12 @@ struct screen {
 
 	int			 mode;
 
-	bitstr_t		*tabs;
+	u_int			 saved_cx;
+	u_int			 saved_cy;
+	struct grid		*saved_grid;
+	struct grid_cell	 saved_cell;
 
+	bitstr_t		*tabs;
 	struct screen_sel	*sel;
 };
 
@@ -917,12 +921,6 @@ struct window_pane {
 	struct screen	 status_screen;
 	size_t		 status_size;
 
-	/* Saved in alternative screen mode. */
-	u_int		 saved_cx;
-	u_int		 saved_cy;
-	struct grid	*saved_grid;
-	struct grid_cell saved_cell;
-
 	TAILQ_HEAD (, window_mode_entry) modes;
 	struct event	 modetimer;
 	time_t		 modelast;
@@ -2296,7 +2294,7 @@ void	 recalculate_size(struct window *);
 void	 recalculate_sizes(void);
 
 /* input.c */
-struct input_ctx *input_init(struct window_pane *);
+struct input_ctx *input_init(struct window_pane *, struct bufferevent *);
 void	 input_free(struct input_ctx *);
 void	 input_reset(struct input_ctx *, int);
 struct evbuffer *input_pending(struct input_ctx *);
@@ -2334,6 +2332,7 @@ struct grid *grid_create(u_int, u_int, u_int);
 void	 grid_destroy(struct grid *);
 int	 grid_compare(struct grid *, struct grid *);
 void	 grid_collect_history(struct grid *);
+void	 grid_remove_history(struct grid *, u_int );
 void	 grid_scroll_history(struct grid *, u_int);
 void	 grid_scroll_history_region(struct grid *, u_int, u_int, u_int);
 void	 grid_clear_history(struct grid *);
@@ -2458,6 +2457,9 @@ void	 screen_hide_selection(struct screen *);
 int	 screen_check_selection(struct screen *, u_int, u_int);
 void	 screen_select_cell(struct screen *, struct grid_cell *,
 	     const struct grid_cell *);
+void	 screen_alternate_on(struct screen *, struct grid_cell *, int);
+void	 screen_alternate_off(struct screen *, struct grid_cell *, int);
+
 
 /* window.c */
 extern struct windows windows;
diff --git a/window.c b/window.c
index 754b9e59..4ae67916 100644
--- a/window.c
+++ b/window.c
@@ -879,10 +879,6 @@ window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
 	wp->pipe_off = 0;
 	wp->pipe_event = NULL;
 
-	wp->saved_grid = NULL;
-	wp->saved_cx = UINT_MAX;
-	wp->saved_cy = UINT_MAX;
-
 	screen_init(&wp->base, sx, sy, hlimit);
 	wp->screen = &wp->base;
 
@@ -891,8 +887,6 @@ window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
 	if (gethostname(host, sizeof host) == 0)
 		screen_set_title(&wp->base, host);
 
-	wp->ictx = input_init(wp);
-
 	return (wp);
 }
 
@@ -906,14 +900,12 @@ window_pane_destroy(struct window_pane *wp)
 		bufferevent_free(wp->event);
 		close(wp->fd);
 	}
-
-	input_free(wp->ictx);
+	if (wp->ictx != NULL)
+		input_free(wp->ictx);
 
 	screen_free(&wp->status_screen);
 
 	screen_free(&wp->base);
-	if (wp->saved_grid != NULL)
-		grid_destroy(wp->saved_grid);
 
 	if (wp->pipe_fd != -1) {
 		bufferevent_free(wp->pipe_event);
@@ -974,6 +966,7 @@ window_pane_set_event(struct window_pane *wp)
 
 	wp->event = bufferevent_new(wp->fd, window_pane_read_callback,
 	    NULL, window_pane_error_callback, wp);
+	wp->ictx = input_init(wp, wp->event);
 
 	bufferevent_setwatermark(wp->event, EV_READ, 0, READ_SIZE);
 	bufferevent_enable(wp->event, EV_READ|EV_WRITE);
@@ -990,7 +983,7 @@ window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
 	wp->sy = sy;
 
 	log_debug("%s: %%%u resize %ux%u", __func__, wp->id, sx, sy);
-	screen_resize(&wp->base, sx, sy, wp->saved_grid == NULL);
+	screen_resize(&wp->base, sx, sy, wp->base.saved_grid == NULL);
 
 	wme = TAILQ_FIRST(&wp->modes);
 	if (wme != NULL && wme->mode->resize != NULL)
@@ -999,90 +992,23 @@ window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
 	wp->flags |= (PANE_RESIZE|PANE_RESIZED);
 }
 
-/*
- * Enter alternative screen mode. A copy of the visible screen is saved and the
- * history is not updated
- */
 void
 window_pane_alternate_on(struct window_pane *wp, struct grid_cell *gc,
     int cursor)
 {
-	struct screen	*s = &wp->base;
-	u_int		 sx, sy;
-
-	if (wp->saved_grid != NULL)
-		return;
 	if (!options_get_number(wp->options, "alternate-screen"))
 		return;
-	sx = screen_size_x(s);
-	sy = screen_size_y(s);
-
-	wp->saved_grid = grid_create(sx, sy, 0);
-	grid_duplicate_lines(wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
-	if (cursor) {
-		wp->saved_cx = s->cx;
-		wp->saved_cy = s->cy;
-	}
-	memcpy(&wp->saved_cell, gc, sizeof wp->saved_cell);
-
-	grid_view_clear(s->grid, 0, 0, sx, sy, 8);
-
-	wp->base.grid->flags &= ~GRID_HISTORY;
-
+	screen_alternate_on(&wp->base, gc, cursor);
 	wp->flags |= PANE_REDRAW;
 }
 
-/* Exit alternate screen mode and restore the copied grid. */
 void
 window_pane_alternate_off(struct window_pane *wp, struct grid_cell *gc,
     int cursor)
 {
-	struct screen	*s = &wp->base;
-	u_int		 sx, sy;
-
 	if (!options_get_number(wp->options, "alternate-screen"))
 		return;
-
-	/*
-	 * Restore the cursor position and cell. This happens even if not
-	 * currently in the alternate screen.
-	 */
-	if (cursor && wp->saved_cx != UINT_MAX && wp->saved_cy != UINT_MAX) {
-		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;
-		memcpy(gc, &wp->saved_cell, sizeof *gc);
-	}
-
-	if (wp->saved_grid == NULL)
-		return;
-	sx = screen_size_x(s);
-	sy = screen_size_y(s);
-
-	/*
-	 * 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, 1);
-
-	/* Restore the saved grid. */
-	grid_duplicate_lines(s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
-
-	/*
-	 * 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 || sx != wp->saved_grid->sx)
-		screen_resize(s, sx, sy, 1);
-
-	grid_destroy(wp->saved_grid);
-	wp->saved_grid = NULL;
-
+	screen_alternate_off(&wp->base, gc, cursor);
 	wp->flags |= PANE_REDRAW;
 }