Do not show notifications when in fullscreen or screensaver mode....

chrome/browser/fullscreen_mac.mm

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "chrome/browser/fullscreen.h"
+
+#import "base/logging.h"

[dmac, 2011/01/21 19:34:44]

base/logging should be under system imports.

[jianli, 2011/01/21 20:21:00]

Done.

+#import <Carbon/Carbon.h>
+#import <Cocoa/Cocoa.h>
+
+@interface FullScreenMonitor : NSObject {
+ @private
+  BOOL isFullScreen_;
+  EventHandlerRef eventHandler_;
+}
+
+- (BOOL) isFullScreen;

[dmac, 2011/01/21 19:34:44]

no space between ) and i (same on line below)

[jianli, 2011/01/21 20:21:00]

Done.

+- (void) setIsFullScreen:(BOOL)newIsFullScreen;

[dmac, 2011/01/21 19:34:44]

cocoa naming would be isFullScreen and setFullScreen

[jianli, 2011/01/21 20:21:00]

Done.

+
+@end
+
+static OSStatus handleAppEvent(EventHandlerCallRef myHandler,
+                               EventRef event,
+                               void* userData) {
+  DCHECK(userData);
+
+  FullScreenMonitor* fullScreenMonitor =
+      reinterpret_cast<FullScreenMonitor*>(userData);
+
+  UInt32 mode = 0;
+  (void) GetEventParameter(event,
+                           kEventParamSystemUIMode,
+                           typeUInt32,
+                           /*outActualType*/ NULL,

[dmac, 2011/01/21 19:34:44]

get rid of /*value*/ and do you want to check for an error on this?

[jianli, 2011/01/21 20:21:00]

Done.

+                           sizeof(UInt32),
+                           /*outActualSize*/ NULL,
+                           &mode);
+  BOOL isFullScreenMode = mode == kUIModeAllHidden;
+  [fullScreenMonitor setIsFullScreen:isFullScreenMode];
+  return noErr;
+}
+
+@implementation FullScreenMonitor
+
+- (id)init {
+  if ((self = [super init])) {
+    // Check if the user is in presentation mode initially. We do this by

[dmac, 2011/01/21 19:34:44]

When this is initialized, do we expect Chrome to be in the background? If we are
in the foreground could we not use

GetSystemUIMode?

[jianli, 2011/01/21 20:21:00]

No. InitFullScreenMonitor is called when NotificationUIManager is initialized
which happens in UI thread.

+    // checking if the menu bar is visible.
+    NSArray* screens = [NSScreen screens];
+    if ([screens count] > 0) {
+      NSScreen* screen = [screens objectAtIndex:0];
+      NSRect fullBounds = [screen frame];
+      NSRect workBounds = [screen visibleFrame];
+      if (NSMaxY(fullBounds) == NSMaxY(workBounds))
+        isFullScreen_ = YES;
+    }
+
+    // Register a Carbon event to receive the notification about the login
+    // session's UI mode change.
+    EventTypeSpec events[] =
+      {{ kEventClassApplication, kEventAppSystemUIModeChanged }};
+    OSStatus res = InstallApplicationEventHandler(
+        NewEventHandlerUPP(handleAppEvent),
+        GetEventTypeCount(events),
+        events,
+        self,
+        &eventHandler_);
+    DCHECK(res == noErr);
+    (void) res;  // Work around unused variable warning.
+  }
+  return self;
+}
+
+- (void)dealloc {
+  if (eventHandler_)
+    RemoveEventHandler(eventHandler_);
+  [super dealloc];
+}
+
+- (BOOL)isFullScreen {
+  return isFullScreen_;
+}
+
+- (void)setIsFullScreen:(BOOL)newIsFullScreen {
+  isFullScreen_ = newIsFullScreen;
+}
+
+@end
+
+FullScreenMonitor* g_fullScreenMonitor = nil;
+
+void InitFullScreenMonitor() {
+  if (!g_fullScreenMonitor)
+    g_fullScreenMonitor = [[FullScreenMonitor alloc] init];
+}
+
+void StopFullScreenMonitor() {
+  g_fullScreenMonitor = nil;

[dmac, 2011/01/21 19:34:44]

[g_fullScreenMonitor release]; ?

[jianli, 2011/01/21 20:21:00]

Done.

+}
+
+bool IsFullScreenMode() {
+  // Check if the main display has been captured (game in particular).
+  if (CGDisplayIsCaptured(CGMainDisplayID()))
+    return true;
+
+  return [g_fullScreenMonitor isFullScreen];
+}