From 0641ec2d899b2b20d42d3618d6dce691d43fac79 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 23 Mar 2024 12:30:31 +0530
Subject: [PATCH] GLFW API for configuring a window as a layer shell

---
 glfw/glfw.py         |  1 +
 glfw/glfw3.h         |  8 ++++++++
 glfw/wl_window.c     |  8 ++++++++
 kitty/glfw-wrapper.c |  3 +++
 kitty/glfw-wrapper.h | 12 ++++++++++++
 5 files changed, 32 insertions(+)

diff --git a/glfw/glfw.py b/glfw/glfw.py
index 3fca901ea..db4d975a4 100755
--- a/glfw/glfw.py
+++ b/glfw/glfw.py
@@ -314,6 +314,7 @@ def generate_wrappers(glfw_header: str) -> None:
     void glfwWaylandRunWithActivationToken(GLFWwindow *handle, GLFWactivationcallback cb, void *cb_data)
     bool glfwWaylandSetTitlebarColor(GLFWwindow *handle, uint32_t color, bool use_system_color)
     void glfwWaylandRedrawCSDWindowTitle(GLFWwindow *handle)
+    GLFWLayerShellConfig* glfwWaylandSetupLayerShellForNextWindow(void)
     unsigned long long glfwDBusUserNotify(const char *app_name, const char* icon, const char *summary, const char *body, \
 const char *action_text, int32_t timeout, GLFWDBusnotificationcreatedfun callback, void *data)
     void glfwDBusSetUserNotificationHandler(GLFWDBusnotificationactivatedfun handler)
diff --git a/glfw/glfw3.h b/glfw/glfw3.h
index e35d1330b..1f412f9a8 100644
--- a/glfw/glfw3.h
+++ b/glfw/glfw3.h
@@ -1292,6 +1292,14 @@ typedef struct GLFWkeyevent
     bool fake_event_on_focus_change;
 } GLFWkeyevent;
 
+typedef enum { GLFW_LAYER_SHELL_NONE, GLFW_LAYER_SHELL_BACKGROUND, GLFW_LAYER_SHELL_PANEL } GLFWLayerShellType;
+
+typedef struct GLFWLayerShellConfig {
+    GLFWLayerShellType type;
+    const char *output_name;
+    const char *edge;
+} GLFWLayerShellConfig;
+
 /*! @brief The function pointer type for error callbacks.
  *
  *  This is the function pointer type for error callbacks.  An error callback
diff --git a/glfw/wl_window.c b/glfw/wl_window.c
index 380b88a3f..b7b034302 100644
--- a/glfw/wl_window.c
+++ b/glfw/wl_window.c
@@ -43,6 +43,8 @@
 
 #define debug(...) if (_glfw.hints.init.debugRendering) fprintf(stderr, __VA_ARGS__);
 
+static GLFWLayerShellConfig layer_shell_config_for_next_window = {0};
+
 static void
 activation_token_done(void *data, struct xdg_activation_token_v1 *xdg_token, const char *token) {
     for (size_t i = 0; i < _glfw.wl.activation_requests.sz; i++) {
@@ -2425,3 +2427,9 @@ GLFWAPI void glfwWaylandRedrawCSDWindowTitle(GLFWwindow *handle) {
     _GLFWwindow* window = (_GLFWwindow*) handle;
     change_csd_title(window);
 }
+
+
+GLFWAPI GLFWLayerShellConfig* glfwWaylandSetupLayerShellForNextWindow(void) {
+    memset(&layer_shell_config_for_next_window, 0, sizeof(layer_shell_config_for_next_window));
+    return &layer_shell_config_for_next_window;
+}
diff --git a/kitty/glfw-wrapper.c b/kitty/glfw-wrapper.c
index d5159141d..b6c38a7ad 100644
--- a/kitty/glfw-wrapper.c
+++ b/kitty/glfw-wrapper.c
@@ -479,6 +479,9 @@ load_glfw(const char* path) {
     *(void **) (&glfwWaylandRedrawCSDWindowTitle_impl) = dlsym(handle, "glfwWaylandRedrawCSDWindowTitle");
     if (glfwWaylandRedrawCSDWindowTitle_impl == NULL) dlerror(); // clear error indicator
 
+    *(void **) (&glfwWaylandSetupLayerShellForNextWindow_impl) = dlsym(handle, "glfwWaylandSetupLayerShellForNextWindow");
+    if (glfwWaylandSetupLayerShellForNextWindow_impl == NULL) dlerror(); // clear error indicator
+
     *(void **) (&glfwDBusUserNotify_impl) = dlsym(handle, "glfwDBusUserNotify");
     if (glfwDBusUserNotify_impl == NULL) dlerror(); // clear error indicator
 
diff --git a/kitty/glfw-wrapper.h b/kitty/glfw-wrapper.h
index cb44daa7a..b160fbe8d 100644
--- a/kitty/glfw-wrapper.h
+++ b/kitty/glfw-wrapper.h
@@ -1030,6 +1030,14 @@ typedef struct GLFWkeyevent
     bool fake_event_on_focus_change;
 } GLFWkeyevent;
 
+typedef enum { GLFW_LAYER_SHELL_NONE, GLFW_LAYER_SHELL_BACKGROUND, GLFW_LAYER_SHELL_PANEL } GLFWLayerShellType;
+
+typedef struct GLFWLayerShellConfig {
+    GLFWLayerShellType type;
+    const char *output_name;
+    const char *edge;
+} GLFWLayerShellConfig;
+
 /*! @brief The function pointer type for error callbacks.
  *
  *  This is the function pointer type for error callbacks.  An error callback
@@ -2293,6 +2301,10 @@ typedef void (*glfwWaylandRedrawCSDWindowTitle_func)(GLFWwindow*);
 GFW_EXTERN glfwWaylandRedrawCSDWindowTitle_func glfwWaylandRedrawCSDWindowTitle_impl;
 #define glfwWaylandRedrawCSDWindowTitle glfwWaylandRedrawCSDWindowTitle_impl
 
+typedef GLFWLayerShellConfig* (*glfwWaylandSetupLayerShellForNextWindow_func)(void);
+GFW_EXTERN glfwWaylandSetupLayerShellForNextWindow_func glfwWaylandSetupLayerShellForNextWindow_impl;
+#define glfwWaylandSetupLayerShellForNextWindow glfwWaylandSetupLayerShellForNextWindow_impl
+
 typedef unsigned long long (*glfwDBusUserNotify_func)(const char*, const char*, const char*, const char*, const char*, int32_t, GLFWDBusnotificationcreatedfun, void*);
 GFW_EXTERN glfwDBusUserNotify_func glfwDBusUserNotify_impl;
 #define glfwDBusUserNotify glfwDBusUserNotify_impl