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1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#import "ui/base/cocoa/fullscreen_window_manager.h"
6
7namespace {
8
9// Get the screen with the menu bar.
10NSScreen* GetMenuBarScreen() {
11  // Documentation in NSScreen says that the first object in
12  // +[NSScreen screens] is the menu bar screen.
13  NSArray *screens = [NSScreen screens];
14  if ([screens count])
15    return [screens objectAtIndex:0];
16  return nil;
17}
18
19// Get the screen with the dock.
20NSScreen* GetDockScreen() {
21  NSArray *screens = [NSScreen screens];
22  NSUInteger count = [screens count];
23  if (count == 0)
24    return NULL;
25  if (count == 1)
26    return [screens objectAtIndex:0];
27
28  for (NSUInteger i = 1; i < count; ++i) {
29    NSScreen* screen = [screens objectAtIndex:i];
30    // This screen is not the menu bar screen since it's not index 0. Therefore,
31    // the only reason that the frame would not match the visible frame is if
32    // the dock is on the screen.
33    if (!NSEqualRects([screen frame], [screen visibleFrame]))
34      return screen;
35  }
36  return [screens objectAtIndex:0];
37}
38
39}  // namespace
40
41@interface FullscreenWindowManager()
42- (void)onScreenChanged:(NSNotification*)note;
43- (void)update;
44@end
45
46@implementation FullscreenWindowManager
47
48- (id)initWithWindow:(NSWindow*)window
49       desiredScreen:(NSScreen*)desiredScreen {
50  if ((self = [super init])) {
51    window_.reset([window retain]);
52    desiredScreen_.reset([desiredScreen retain]);
53    fullscreenMode_ = base::mac::kFullScreenModeNormal;
54    [[NSNotificationCenter defaultCenter]
55        addObserver:self
56           selector:@selector(onScreenChanged:)
57               name:NSApplicationDidChangeScreenParametersNotification
58             object:NSApp];
59  }
60  return self;
61}
62
63- (void)dealloc {
64  [[NSNotificationCenter defaultCenter] removeObserver:self];
65  [self exitFullscreenMode];
66  [super dealloc];
67}
68
69- (void)enterFullscreenMode {
70  if (fullscreenActive_)
71    return;
72  fullscreenActive_ = true;
73  [self update];
74}
75
76- (void)exitFullscreenMode {
77  if (!fullscreenActive_)
78    return;
79  fullscreenActive_ = false;
80  [self update];
81}
82
83- (void)onScreenChanged:(NSNotification*)note {
84  [self update];
85}
86
87- (void)update {
88  if (![[NSScreen screens] containsObject:desiredScreen_])
89    desiredScreen_.reset([[window_ screen] retain]);
90
91  base::mac::FullScreenMode newMode;
92  if (!fullscreenActive_)
93    newMode = base::mac::kFullScreenModeNormal;
94  else if (desiredScreen_ == GetMenuBarScreen())
95    newMode = base::mac::kFullScreenModeHideAll;
96  else if (desiredScreen_ == GetDockScreen())
97    newMode = base::mac::kFullScreenModeHideDock;
98  else
99    newMode = base::mac::kFullScreenModeNormal;
100
101  if (fullscreenMode_ != newMode) {
102    if (fullscreenMode_ != base::mac::kFullScreenModeNormal)
103      base::mac::ReleaseFullScreen(fullscreenMode_);
104    if (newMode != base::mac::kFullScreenModeNormal)
105      base::mac::RequestFullScreen(newMode);
106    fullscreenMode_ = newMode;
107  }
108
109  if (fullscreenActive_)
110    [window_ setFrame:[desiredScreen_ frame] display:YES];
111}
112
113@end
114