mac: Implement custom AppKit Enter Fullscreen transition.

chrome/browser/ui/cocoa/browser_window_controller_private.mm

Index: chrome/browser/ui/cocoa/browser_window_controller_private.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller_private.mm b/chrome/browser/ui/cocoa/browser_window_controller_private.mm
index 36a9ccd5d0fde2f556e7de584b576f03888fcd0c..f2c086b0882389ef0b9d17fde3ed128909913441 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller_private.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller_private.mm
@@ -22,6 +22,7 @@
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window_state.h"
+#import "chrome/browser/ui/cocoa/browser_window_enter_fullscreen_transition.h"
 #import "chrome/browser/ui/cocoa/browser_window_layout.h"
 #import "chrome/browser/ui/cocoa/dev_tools_controller.h"
 #import "chrome/browser/ui/cocoa/fast_resize_view.h"
@@ -682,6 +683,8 @@ willPositionSheet:(NSWindow*)sheet
 }
 
 - (void)windowDidEnterFullScreen:(NSNotification*)notification {
+  enterFullscreenTransition_.reset();
+
   // In Yosemite, some combination of the titlebar and toolbar always show in
   // full-screen mode. We do not want either to show. Search for the window that
   // contains the views, and hide it. There is no need to ever unhide the view.
@@ -1002,13 +1005,16 @@ willPositionSheet:(NSWindow*)sheet
   }
 }
 
-- (BOOL)shouldUseMavericksAppKitFullscreenHack {
++ (BOOL)systemSettingsRequireMavericksAppKitFullscreenHack {
   if (!base::mac::IsOSMavericks())
     return NO;
-  if (![NSScreen respondsToSelector:@selector(screensHaveSeparateSpaces)] ||
-      ![NSScreen screensHaveSeparateSpaces]) {
+  return [NSScreen respondsToSelector:@selector(screensHaveSeparateSpaces)] &&
+         [NSScreen screensHaveSeparateSpaces];
+}
+
+- (BOOL)shouldUseMavericksAppKitFullscreenHack {
+  if (![[self class] systemSettingsRequireMavericksAppKitFullscreenHack])
     return NO;
-  }
   if (!enteringAppKitFullscreen_)
     return NO;
   if (enteringAppKitFullscreenOnPrimaryScreen_)
@@ -1017,4 +1023,50 @@ willPositionSheet:(NSWindow*)sheet
   return YES;
 }
 
+- (BOOL)shouldUseCustomAppKitFullscreenTransition {
+  if (base::mac::IsOSMountainLionOrEarlier())
+    return NO;
+
+  NSView* root = [[self.window contentView] superview];
+  if (!root.layer)
+    return NO;
+
+  // AppKit on OSX 10.9 has a bug for applications linked against OSX 10.8 SDK
+  // and earlier. Under specific circumstances, it prevents the custom AppKit
+  // transition from working well. See http://crbug.com/396980 for more
+  // details.
+  if ([[self class] systemSettingsRequireMavericksAppKitFullscreenHack] &&
+      ![[[self window] screen] isEqual:[[NSScreen screens] objectAtIndex:0]]) {
+    return NO;
+  }
+
+  return YES;
+}
+
+- (NSArray*)customWindowsToEnterFullScreenForWindow:(NSWindow*)window {
+  DCHECK([window isEqual:self.window]);
+
+  if (![self shouldUseCustomAppKitFullscreenTransition])
+    return nil;
+
+  enterFullscreenTransition_.reset(
+      [[BrowserWindowEnterFullscreenTransition alloc]
+          initWithWindow:self.window]);
+  return [enterFullscreenTransition_ customWindowsToEnterFullScreen];
+}
+
+- (void)window:(NSWindow*)window
+    startCustomAnimationToEnterFullScreenWithDuration:(NSTimeInterval)duration {
+  DCHECK([window isEqual:self.window]);
+  [enterFullscreenTransition_
+      startCustomAnimationToEnterFullScreenWithDuration:duration];
+}
+
+- (BOOL)shouldConstrainFrameRect {
+  if ([enterFullscreenTransition_ shouldWindowBeUnconstrained])
+    return NO;
+
+  return [super shouldConstrainFrameRect];
+}
+
 @end  // @implementation BrowserWindowController(Private)