From c48313e5233028f520f92bf789ea287ddfc63ee7 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Thu, 15 Aug 2019 04:49:12 +0200
Subject: Add window fullscreen control

---
 README.md          |  1 -
 src/QuickMedia.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 49 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 5c918f8..9e1fc0e 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,5 @@ Add grid-view when thumbnails are visible.\
 Add scrollbar.\
 Add option to scale image to window size.\
 The search should wait until there are search results before clearing the search field and selecting the search suggestion.\
-Full-screening a video doesn't work.\
 Somehow deal with youtube banning ip when searching too often.\
 Optimize shadow rendering for items (Right now they fill too much space that is behind items). It should also be a blurry shadow.
\ No newline at end of file
diff --git a/src/QuickMedia.cpp b/src/QuickMedia.cpp
index 3b379c1..1a1cbff 100644
--- a/src/QuickMedia.cpp
+++ b/src/QuickMedia.cpp
@@ -17,6 +17,7 @@
 #include <cmath>
 #include <string.h>
 #include <X11/Xlib.h>
+#include <X11/Xatom.h>
 #include <signal.h>
 
 const sf::Color front_color(43, 45, 47);
@@ -28,6 +29,14 @@ static void sigpipe_handler(int unused) {
 
 }
 
+static int x_error_handler(Display *display, XErrorEvent *event) {
+    return 0;
+}
+
+static int x_io_error_handler(Display *display) {
+    return 0;
+}
+
 namespace QuickMedia {
     Program::Program() :
         window(sf::VideoMode(800, 600), "QuickMedia"),
@@ -49,6 +58,9 @@ namespace QuickMedia {
         sigemptyset(&action.sa_mask);
         action.sa_flags = 0;
         sigaction(SIGPIPE, &action, NULL);
+
+        XSetErrorHandler(x_error_handler);
+        XSetIOErrorHandler(x_io_error_handler);
     }
 
     Program::~Program() {
@@ -418,6 +430,40 @@ namespace QuickMedia {
         Display *display;
     };
 
+    enum class WindowFullscreenState {
+        UNSET,
+        SET,
+        TOGGLE
+    };
+
+    static bool window_set_fullscreen(Display *display, Window window, WindowFullscreenState state) {
+        Atom wm_state_atom = XInternAtom(display, "_NET_WM_STATE", False);
+        Atom wm_state_fullscreen_atom = XInternAtom(display, "_NET_WM_STATE_FULLSCREEN", False);
+        if(wm_state_atom == False || wm_state_fullscreen_atom == False) {
+            fprintf(stderr, "Failed to fullscreen window. The window manager doesn't support fullscreening windows.\n");
+            return false;
+        }
+
+        XEvent xev;
+        xev.type = ClientMessage;
+        xev.xclient.window = window;
+        xev.xclient.message_type = wm_state_atom;
+        xev.xclient.format = 32;
+        xev.xclient.data.l[0] = (int)state;
+        xev.xclient.data.l[1] = wm_state_fullscreen_atom;
+        xev.xclient.data.l[2] = 0;
+        xev.xclient.data.l[3] = 1;
+        xev.xclient.data.l[4] = 0;
+
+        if(!XSendEvent(display, XDefaultRootWindow(display), 0, SubstructureRedirectMask | SubstructureNotifyMask, &xev)) {
+            fprintf(stderr, "Failed to fullscreen window\n");
+            return false;
+        }
+
+        XFlush(display);
+        return true;
+    }
+
     void Program::video_content_page() {
         search_bar->onTextUpdateCallback = nullptr;
         search_bar->onTextSubmitCallback = nullptr;
@@ -496,8 +542,8 @@ namespace QuickMedia {
         }, on_window_create);
         load_video_error_check();
 
-        auto on_doubleclick = []() {
-            // TODO: Toggle fullscreen of video here
+        auto on_doubleclick = [this, disp]() {
+            window_set_fullscreen(disp, window.getSystemHandle(), WindowFullscreenState::TOGGLE);
         };
 
         sf::Clock ui_hide_timer;
@@ -614,6 +660,7 @@ namespace QuickMedia {
         }
 
         video_player_ui_window.reset();
+        window_set_fullscreen(disp, window.getSystemHandle(), WindowFullscreenState::UNSET);
     }
 
     enum class TrackMediaType {
-- 
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