Commit: patch 9.2.0534: GTK UI does not support fullscreen mode

[Christian Brabandt]

patch 9.2.0534: GTK UI does not support fullscreen mode

Commit: https://github.com/vim/vim/commit/14c6730a3984e49c37301b747f775f0a3f33f7cb
Author: Muraoka Taro <koron....@gmail.com>
Date: Mon May 25 15:48:43 2026 +0000

patch 9.2.0534: GTK UI does not support fullscreen mode

Problem: GTK UI does not support fullscreen mode
Solution: Add support for fullscreen (guioptions+=s) mode
(Muraoka Taro).

closes: #20303

Co-authored-by: Yasuhiro Matsumoto <matt...@gmail.com>
Signed-off-by: Muraoka Taro <koron....@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/doc/gui.txt b/runtime/doc/gui.txt
index 9965e3dd4..3a9feac71 100644
--- a/runtime/doc/gui.txt
+++ b/runtime/doc/gui.txt
@@ -1,4 +1,4 @@
-*gui.txt* For Vim version 9.2. Last change: 2026 Apr 07
+*gui.txt* For Vim version 9.2. Last change: 2026 May 25


VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1254,6 +1254,32 @@ A recommended Japanese font is MS Mincho. You can find info here:
https://learn.microsoft.com/en-us/typography/font-list/ms-mincho
It should be distributed with Windows.

+
+Full Screen *gui-fullscreen*
+
+Fullscreen mode is currently only supported in the Windows and GTK GUI
+versions of Vim.
+
+To enable fullscreen mode in the GUI version of Vim, add the 's' flag
+to the 'guioptions' setting.
+
+For convenience, you can define a command or mapping to toggle fullscreen
+mode:
+>
+ command ToggleFullscreen {
+ if &guioptions =~# 's'
+ set guioptions-=s
+ else
+ set guioptions+=s
+ endif
+ }
+
+ map <expr> <F11> &go =~# 's' ? ":se go-=s<CR>" : ":se go+=s<CR>"
+
+The fullscreen mode will occupy the entire screen area while hiding window
+decorations such as the title bar and borders.
+
+
==============================================================================
8. Shell Commands *gui-shell*

diff --git a/runtime/doc/gui_w32.txt b/runtime/doc/gui_w32.txt
index 2e2e2601d..26c516d89 100644
--- a/runtime/doc/gui_w32.txt
+++ b/runtime/doc/gui_w32.txt
@@ -1,4 +1,4 @@
-*gui_w32.txt* For Vim version 9.2. Last change: 2026 Feb 14
+*gui_w32.txt* For Vim version 9.2. Last change: 2026 May 25


VIM REFERENCE MANUAL by Bram Moolenaar
@@ -505,25 +505,4 @@ To use the system's default title bar colors, set highlighting groups to
hi TitleBarNC guibg=NONE guifg=NONE
<

-Full Screen *gui-w32-fullscreen*
-
-To enable fullscreen mode in the Windows GUI version of Vim, add the 's' flag
-to the 'guioptions' setting.
-
-For convenience, you can define a command or mapping to toggle fullscreen
-mode:
->
- command ToggleFullscreen {
- if &guioptions =~# 's'
- set guioptions-=s
- else
- set guioptions+=s
- endif
- }
-
- map <expr> <F11> &go =~# 's' ? ":se go-=s<CR>" : ":se go+=s<CR>"
-
-The fullscreen mode will occupy the entire screen area while hiding window
-decorations such as the title bar and borders.
-
vim:tw=78:sw=4:ts=8:noet:ft=help:norl:
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index bfab0a87b..6dc518cc7 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt* For Vim version 9.2. Last change: 2026 May 22
+*options.txt* For Vim version 9.2. Last change: 2026 May 25


VIM REFERENCE MANUAL by Bram Moolenaar
@@ -4613,10 +4613,10 @@ A jump table for the options with a short description can be found at |Q_op|.
Photon GUIs.
*'go-s'*
's' Enable fullscreen mode. Currently only supported in the
- MS-Windows GUI version. When set, the window will occupy the
- entire screen and remove window decorations. Define custom
- mappings to toggle this mode conveniently. For detailed usage
- instructions, see |gui-w32-fullscreen|.
+ MS-Windows and GTK GUI version. When set, the window will
+ occupy the entire screen and remove window decorations.
+ Define custom mappings to toggle this mode conveniently.
+ For detailed usage instructions, see |gui-fullscreen|.
*'go-r'*
'r' Right-hand scrollbar is always present.
*'go-R'*
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 7cd0074a6..878f0f520 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -8257,6 +8257,7 @@ gui-font gui.txt /*gui-font*
gui-fontwide gui.txt /*gui-fontwide*
gui-footer debugger.txt /*gui-footer*
gui-fork gui_x11.txt /*gui-fork*
+gui-fullscreen gui.txt /*gui-fullscreen*
gui-functions usr_41.txt /*gui-functions*
gui-gnome gui_x11.txt /*gui-gnome*
gui-gnome-session gui_x11.txt /*gui-gnome-session*
@@ -8286,7 +8287,6 @@ gui-vert-scroll gui.txt /*gui-vert-scroll*
gui-w32 gui_w32.txt /*gui-w32*
gui-w32-cmdargs gui_w32.txt /*gui-w32-cmdargs*
gui-w32-dialogs gui_w32.txt /*gui-w32-dialogs*
-gui-w32-fullscreen gui_w32.txt /*gui-w32-fullscreen*
gui-w32-printing gui_w32.txt /*gui-w32-printing*
gui-w32-start gui_w32.txt /*gui-w32-start*
gui-w32-title-bar gui_w32.txt /*gui-w32-title-bar*
diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index 4f7b9b62d..2bea93a32 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -1,4 +1,4 @@
-*version9.txt* For Vim version 9.2. Last change: 2026 May 22
+*version9.txt* For Vim version 9.2. Last change: 2026 May 25


VIM REFERENCE MANUAL by Bram Moolenaar
@@ -52589,6 +52589,7 @@ GUI ~
-----
- Added support for the GTK 4 GUI (via patch 9.2.0501). Enable with
`--enable-gui=gtk4` configure switch at build time.
+- Add support for fullscreen mode in the GTK UI |'go-s'|.

Popups ~
------
diff --git a/src/gui.c b/src/gui.c
index b04f13216..8cf4c8fa4 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -158,7 +158,7 @@ gui_start(char_u *arg UNUSED)
choose_clipmethod();
#endif

-#ifdef FEAT_GUI_MSWIN
+#if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_GTK)
// Enable fullscreen mode
if (vim_strchr(p_go, GO_FULLSCREEN) != NULL)
gui_mch_set_fullscreen(TRUE);
@@ -3512,7 +3512,9 @@ gui_init_which_components(char_u *oldval UNUSED)
#ifdef FEAT_GUI_MSWIN
static int prev_titlebar = FALSE;
int using_titlebar = FALSE;
+#endif

+#if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_GTK)
static int prev_fullscreen = FALSE;
int using_fullscreen = FALSE;
#endif
@@ -3589,6 +3591,8 @@ gui_init_which_components(char_u *oldval UNUSED)
case GO_TITLEBAR:
using_titlebar = TRUE;
break;
+#endif
+#if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_GTK)
case GO_FULLSCREEN:
using_fullscreen = TRUE;
break;
@@ -3620,7 +3624,9 @@ gui_init_which_components(char_u *oldval UNUSED)
gui_mch_set_titlebar_colors();
prev_titlebar = using_titlebar;
}
+#endif

+#if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_GTK)
if (using_fullscreen != prev_fullscreen)
{
gui_mch_set_fullscreen(using_fullscreen);
diff --git a/src/gui_gtk.c b/src/gui_gtk.c
index 77f96179e..84eae6d41 100644
--- a/src/gui_gtk.c
+++ b/src/gui_gtk.c
@@ -2611,3 +2611,12 @@ recent_func_log_func(const gchar *log_domain UNUSED,
// http://bugzilla.gnome.org/show_bug.cgi?id=664587
}
#endif
+
+ void
+gui_mch_set_fullscreen(int flag)
+{
+ if (flag)
+ gtk_window_fullscreen(GTK_WINDOW(gui.mainwin));
+ else
+ gtk_window_unfullscreen(GTK_WINDOW(gui.mainwin));
+}
diff --git a/src/gui_gtk4.c b/src/gui_gtk4.c
index c12256790..9cbffb3c9 100644
--- a/src/gui_gtk4.c
+++ b/src/gui_gtk4.c
@@ -280,6 +280,7 @@ static gboolean drop_cb(GtkDropTarget *target, const GValue *value, double x, do
#endif
static void mainwin_destroy_cb(GObject *object, gpointer data);
static gboolean delete_event_cb(GtkWindow *window, gpointer data);
+static void mainwin_fullscreened_cb(GObject *obj, GParamSpec *pspec, gpointer user_data);
static void drawarea_realize_cb(GtkWidget *widget, gpointer data);
static void drawarea_unrealize_cb(GtkWidget *widget, gpointer data);
static void drawarea_resize_cb(GtkDrawingArea *area, int width, int height, gpointer data);
@@ -449,6 +450,8 @@ gui_mch_init(void)

g_signal_connect(G_OBJECT(gui.mainwin), "close-request",
G_CALLBACK(delete_event_cb), NULL);
+ g_signal_connect(G_OBJECT(gui.mainwin), "notify::fullscreened",
+ G_CALLBACK(mainwin_fullscreened_cb), NULL);

// A vertical box holds the menubar, toolbar and main text window.
vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
@@ -747,6 +750,26 @@ gui_mch_unmaximize(void)
gtk_window_unmaximize(GTK_WINDOW(gui.mainwin));
}

+ void
+gui_mch_set_fullscreen(int flag)
+{
+ if (gui.mainwin == NULL)
+ return;
+ if (flag)
+ gtk_window_fullscreen(GTK_WINDOW(gui.mainwin));
+ else
+ gtk_window_unfullscreen(GTK_WINDOW(gui.mainwin));
+}
+
+ static void
+mainwin_fullscreened_cb(GObject *obj,
+ GParamSpec *pspec UNUSED, gpointer user_data UNUSED)
+{
+ // Force a redraw of the drawing area when entering fullscreen mode.
+ if (gtk_window_is_fullscreen(GTK_WINDOW(obj)))
+ gui_focus_change(TRUE);
+}
+
/*
* Called when the font changed while the window is maximized or GO_KEEPWINSIZE
* is set. Recalculate Rows and Columns based on the current window size.
diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index b47941acb..44b95345f 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -2850,6 +2850,18 @@ mainwin_screen_changed_cb(GtkWidget *widget,
}
}

+ static gboolean
+mainwin_state_event_cb(GtkWidget *widget UNUSED,
+ GdkEventWindowState *event,
+ gpointer user_data UNUSED)
+{
+ if (event->new_window_state & GDK_WINDOW_STATE_FULLSCREEN)
+ // To redraw the text area when switching to fullscreen mode, we will
+ // reuse the `gui_focus_change` method.
+ gui_focus_change(TRUE);
+ return FALSE;
+}
+
/*
* After the drawing area comes up, we calculate all colors and create the
* dummy blank cursor.
@@ -3826,6 +3838,9 @@ gui_mch_init(void)
g_signal_connect(G_OBJECT(gui.mainwin), "screen-changed",
G_CALLBACK(&mainwin_screen_changed_cb), NULL);

+ g_signal_connect(G_OBJECT(gui.mainwin), "window-state-event",
+ G_CALLBACK(&mainwin_state_event_cb), NULL);
+
gui.accel_group = gtk_accel_group_new();
gtk_window_add_accel_group(GTK_WINDOW(gui.mainwin), gui.accel_group);

diff --git a/src/proto/gui_gtk.pro b/src/proto/gui_gtk.pro
index 7b87ba00b..9b69c6941 100644
--- a/src/proto/gui_gtk.pro
+++ b/src/proto/gui_gtk.pro
@@ -21,4 +21,5 @@ void gui_make_popup(char_u *path_name, int mouse_pos);
void gui_mch_find_dialog(exarg_T *eap);
void gui_mch_replace_dialog(exarg_T *eap);
void ex_helpfind(exarg_T *eap);
+void gui_mch_set_fullscreen(int flag);
/* vim: set ft=c : */
diff --git a/src/proto/gui_gtk4.pro b/src/proto/gui_gtk4.pro
index 7359c750c..10f3ccc20 100644
--- a/src/proto/gui_gtk4.pro
+++ b/src/proto/gui_gtk4.pro
@@ -16,6 +16,7 @@ int gui_mch_get_winpos(int *x, int *y);
void gui_mch_set_winpos(int x, int y);
int gui_mch_maximized(void);
void gui_mch_unmaximize(void);
+void gui_mch_set_fullscreen(int flag);
void gui_mch_newfont(void);
void gui_mch_settitle(char_u *title, char_u *icon);
void gui_mch_set_shellsize(int width, int height, int min_width, int min_height, int base_width, int base_height, int direction);
diff --git a/src/version.c b/src/version.c
index 2056d7110..14ae41df7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 534,
/**/
533,
/**/