From 312a8f2e5832c06fcd228acee4945b3236841ee1 Mon Sep 17 00:00:00 2001
From: Matias Linares <matiaslina@openmailbox.org>
Date: Sun, 27 Dec 2015 23:17:00 -0300
Subject: Better fullscreen handling.

---
 src/safe_x11/window.rs | 37 +++++++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 14 deletions(-)

(limited to 'src/safe_x11/window.rs')

diff --git a/src/safe_x11/window.rs b/src/safe_x11/window.rs
index 8a3bab4..78b73f7 100644
--- a/src/safe_x11/window.rs
+++ b/src/safe_x11/window.rs
@@ -38,6 +38,7 @@ pub struct XWindow {
     /// xlib::Window that wraps this struct.
     pub inner: Window,
     fullscreen: bool,
+    prev_attribs: XWindowAttributes,
 }
 
 fn fixed_with_ratio(x: i32, ratio: f32) -> i32 {
@@ -51,10 +52,12 @@ impl XWindow {
     /// `None` if the window is the root window.
     pub fn new(d: *mut xlib::Display, w: Window) -> Option<XWindow> {
         if w != 0 {
+            let attrs: XWindowAttributes = unsafe { uninitialized() };
             Some(XWindow {
                 display: d,
                 inner: w,
                 fullscreen: false,
+                prev_attribs: attrs,
             })
         } else {
             None
@@ -210,30 +213,36 @@ impl XWindow {
     }
 
     /// Fullscreen toggle
-    pub fn toggle_fullscreen(&mut self, wm_state_atom: Atom,
-                             fs_atom: Atom, fullscreen: bool) {
+    pub fn fullscreen(&mut self, wm_state_atom: Atom, fs_atom: Atom) {
         let screen = unsafe { XDefaultScreen(self.display) };
         let dh: u32 = unsafe { XDisplayHeight(self.display, screen) as u32 };
         let dw: u32 = unsafe { XDisplayWidth(self.display, screen) as u32 };
 
-        if fullscreen != self.fullscreen {
-            self.fullscreen = fullscreen;
-            let fs_atom_slice: &[Atom; 1]  = &[fs_atom];
-            let fs_atom_ptr: *const u8 = unsafe { transmute(fs_atom_slice) };
+        if !self.fullscreen {
+            // First, store the XWindowAttributes to query later.
+            self.prev_attribs = self.attributes();
 
-            unsafe {
-                XChangeProperty(self.display, self.inner, wm_state_atom,
-                                XA_ATOM, 32, PropModeReplace, fs_atom_ptr,
-                                fullscreen as i32);
-            }
-        }
-
-        if fullscreen {
+            self.fullscreen = true;
             self.move_resize(0, 0, dw, dh);
             self.set_border_width(0);
         } else {
+            self.fullscreen = false;
+            self.move_resize(self.prev_attribs.x,
+                             self.prev_attribs.y,
+                             self.prev_attribs.width as u32,
+                             self.prev_attribs.height as u32);
             self.set_border_width(1);
         }
+
+        // EWMH for fullscreen (Don't know how to test it.)
+        let fs_atom_slice: &[Atom; 1]  = &[fs_atom];
+        let fs_atom_ptr: *const u8 = unsafe { transmute(fs_atom_slice) };
+
+        unsafe {
+            XChangeProperty(self.display, self.inner, wm_state_atom,
+                            XA_ATOM, 32, PropModeReplace, fs_atom_ptr,
+                            self.fullscreen as i32);
+        }
     }
 
     pub fn map(&self) {
-- 
cgit v1.2.3-70-g09d2