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Support hide_window_decorations titlebar-only on Wayland

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Hide the CSD titlebar subsurface while keeping shadow borders for
resizing. On SSD compositors (GNOME), forces CSD mode to draw
kitty's own shadows without a titlebar.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Antoine Cellerier
2026-02-08 12:12:15 +01:00
parent abb1141826
commit ef4574ae97
9 changed files with 82 additions and 20 deletions
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25
glfw/wl_window.c vendored
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@@ -813,6 +813,8 @@ apply_xdg_configure_changes(_GLFWwindow *window) {
if (window->wl.pending_state & PENDING_STATE_DECORATION) {
uint32_t mode = window->wl.pending.decoration_mode;
bool has_server_side_decorations = (mode == ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
// Force CSD when decorations are hidden or titlebar is hidden
if (!window->decorated || window->wl.decorations.titlebar_hidden) has_server_side_decorations = false;
window->wl.decorations.serverSide = has_server_side_decorations;
window->wl.current.decoration_mode = mode;
}
@@ -960,8 +962,14 @@ static void
setXdgDecorations(_GLFWwindow* window)
{
if (window->wl.xdg.decoration) {
window->wl.decorations.serverSide = true;
zxdg_toplevel_decoration_v1_set_mode(window->wl.xdg.decoration, window->decorated ? ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE: ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE);
if (window->wl.decorations.titlebar_hidden) {
window->wl.decorations.serverSide = false;
zxdg_toplevel_decoration_v1_set_mode(window->wl.xdg.decoration, ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE);
csd_set_visible(window, csd_should_window_be_decorated(window));
} else {
window->wl.decorations.serverSide = true;
zxdg_toplevel_decoration_v1_set_mode(window->wl.xdg.decoration, window->decorated ? ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE: ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE);
}
} else {
window->wl.decorations.serverSide = false;
csd_set_visible(window, csd_should_window_be_decorated(window));
@@ -1707,7 +1715,8 @@ void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
if (window->decorated && !window->monitor && !window->wl.decorations.serverSide)
{
if (top)
*top = window->wl.decorations.metrics.top - window->wl.decorations.metrics.visible_titlebar_height;
*top = window->wl.decorations.titlebar_hidden ? 0 :
window->wl.decorations.metrics.top - window->wl.decorations.metrics.visible_titlebar_height;
if (left)
*left = window->wl.decorations.metrics.width;
if (right)
@@ -3034,6 +3043,16 @@ GLFWAPI void glfwWaylandRedrawCSDWindowTitle(GLFWwindow *handle) {
if (csd_change_title(window)) commit_window_surface_if_safe(window);
}
GLFWAPI void glfwWaylandSetTitlebarHidden(GLFWwindow *handle, bool hidden) {
_GLFWwindow* window = (_GLFWwindow*) handle;
if (window->wl.decorations.titlebar_hidden != hidden) {
window->wl.decorations.titlebar_hidden = hidden;
setXdgDecorations(window);
inform_compositor_of_window_geometry(window, "SetTitlebarHidden");
commit_window_surface_if_safe(window);
}
}
const GLFWLayerShellConfig*
_glfwPlatformGetLayerShellConfig(_GLFWwindow *window) {
return &window->wl.layer_shell.config;