Commit: patch 9.2.0861: GTK4: bleed region updates in jumps

[Christian Brabandt]

patch 9.2.0861: GTK4: bleed region updates in jumps

Commit: https://github.com/vim/vim/commit/074e419c44620a58df88dead0c31b850241afda8
Author: Foxe Chen <chen...@gmail.com>
Date: Mon Jul 27 19:13:22 2026 +0000

patch 9.2.0861: GTK4: bleed region updates in jumps

Problem: In the GTK4 GUI (GtkSnapshot) the bleed region is only
repainted when the text grid changes by a whole cell,
so during a resize it updates in jumps of several pixels
instead of following the window edge smoothly.
Solution: Redraw the draw area whenever the bleed values change
(Foxe Chen).

closes: #20851

Signed-off-by: Foxe Chen <chen...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/gui.c b/src/gui.c
index 0c7b39be0..d58f9f2cc 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -1727,7 +1727,7 @@ again:
gui_update_scrollbars(TRUE);
gui_update_cursor(FALSE, TRUE);
#if defined(FEAT_GUI_GTK) && defined(USE_GTK4_SNAPSHOT)
- gui_gtk_calculate_bleed(pixel_width, pixel_height);
+ gui_gtk4_calculate_bleed(pixel_width, pixel_height);
#endif
#if defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)
xim_set_status_area();
@@ -1900,7 +1900,7 @@ gui_set_shellsize(
gui_reset_scroll_region();

#if defined(FEAT_GUI_GTK) && defined(USE_GTK4_SNAPSHOT)
- gui_gtk_calculate_bleed(width, height);
+ gui_gtk4_calculate_bleed(width, height);
#endif
}

diff --git a/src/gui_gtk4.c b/src/gui_gtk4.c
index 486ed38a0..6e5dbfda1 100644
--- a/src/gui_gtk4.c
+++ b/src/gui_gtk4.c
@@ -5018,8 +5018,11 @@ gui_mch_set_text_area_pos(int x, int y, int w, int h)
* after all UI elements are positioned and resized.
*/
void
-gui_gtk_calculate_bleed(int width, int height)
+gui_gtk4_calculate_bleed(int width, int height)
{
+ int old_right = gui.bleed_right;
+ int old_bot = gui.bleed_bot;
+
gui.bleed_right = width - last_text_area_w;
gui.bleed_bot = height - last_text_area_h;

@@ -5035,6 +5038,10 @@ gui_gtk_calculate_bleed(int width, int height)
gui.bleed_right = 0;
if (gui.bleed_bot < 0)
gui.bleed_bot = 0;
+
+ // Make sure to update draw area if changed
+ if (old_right != gui.bleed_right || old_bot != gui.bleed_bot)
+ gtk_widget_queue_draw(GTK_WIDGET(gui.drawarea));
}
#endif

diff --git a/src/proto/gui_gtk4.pro b/src/proto/gui_gtk4.pro
index af55b50fc..1541e4564 100644
--- a/src/proto/gui_gtk4.pro
+++ b/src/proto/gui_gtk4.pro
@@ -106,7 +106,7 @@ int gui_mch_get_scrollbar_ypadding(void);
void gui_mch_create_scrollbar(scrollbar_T *sb, int orient);
void gui_mch_destroy_scrollbar(scrollbar_T *sb);
void gui_mch_set_text_area_pos(int x, int y, int w, int h);
-void gui_gtk_calculate_bleed(int width, int height);
+void gui_gtk4_calculate_bleed(int width, int height);
char_u *gui_mch_browse(int saving, char_u *title, char_u *dflt, char_u *ext, char_u *initdir, char_u *filter);
char_u *gui_mch_browsedir(char_u *title, char_u *initdir);
int gui_mch_dialog(int type, char_u *title, char_u *message, char_u *buttons, int def_but, char_u *textfield, int ex_cmd);
diff --git a/src/version.c b/src/version.c
index 131299e89..a183147a6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 861,
/**/
860,
/**/