chrome/browser/ui/cocoa/full_size_content_window.mm

   1 // Copyright 2014 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 "chrome/browser/ui/cocoa/full_size_content_window.h"
   6
   7 #include "base/logging.h"
   8
   9 @interface FullSizeContentWindow ()
  10
  11 + (BOOL)shouldUseFullSizeContentViewForStyle:(NSUInteger)windowStyle;
  12
  13 @end
  14
  15 // This view always takes the size of its superview. It is intended to be used
  16 // as a NSWindow's contentView.  It is needed because NSWindow's implementation
  17 // explicitly resizes the contentView at inopportune times.
  18 @interface FullSizeContentView : NSView
  19 @end
  20
  21 @implementation FullSizeContentView
  22
  23 // This method is directly called by AppKit during a live window resize.
  24 // Override it to prevent the content view from shrinking.
  25 - (void)setFrameSize:(NSSize)size {
  26   if ([self superview])
  27     size = [[self superview] bounds].size;
  28   [super setFrameSize:size];
  29 }
  30
  31 @end
  32
  33 @implementation FullSizeContentWindow
  34
  35 #pragma mark - Lifecycle
  36
  37 - (instancetype)init {
  38   NOTREACHED();
  39   return nil;
  40 }
  41
  42 - (instancetype)initWithContentRect:(NSRect)contentRect
  43                           styleMask:(NSUInteger)windowStyle
  44                             backing:(NSBackingStoreType)bufferingType
  45                               defer:(BOOL)deferCreation {
  46   return [self initWithContentRect:contentRect
  47                          styleMask:windowStyle
  48                            backing:bufferingType
  49                              defer:deferCreation
  50             wantsViewsOverTitlebar:NO];
  51 }
  52
  53 - (instancetype)initWithContentRect:(NSRect)contentRect
  54                           styleMask:(NSUInteger)windowStyle
  55                             backing:(NSBackingStoreType)bufferingType
  56                               defer:(BOOL)deferCreation
  57              wantsViewsOverTitlebar:(BOOL)wantsViewsOverTitlebar {
  58   self = [super initWithContentRect:contentRect
  59                           styleMask:windowStyle
  60                             backing:bufferingType
  61                               defer:deferCreation];
  62   if (self) {
  63     if (wantsViewsOverTitlebar &&
  64         [FullSizeContentWindow
  65             shouldUseFullSizeContentViewForStyle:windowStyle]) {
  66       chromeWindowView_.reset([[FullSizeContentView alloc] init]);
  67       [chromeWindowView_
  68           setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
  69       [self setContentView:chromeWindowView_];
  70       [chromeWindowView_ setFrame:[[chromeWindowView_ superview] bounds]];
  71
  72       // Our content view overlaps the window control buttons, so we must ensure
  73       // it is positioned below the buttons.
  74       NSView* superview = [chromeWindowView_ superview];
  75       [chromeWindowView_ removeFromSuperview];
  76       [superview addSubview:chromeWindowView_
  77                  positioned:NSWindowBelow
  78                  relativeTo:nil];
  79     }
  80   }
  81   return self;
  82 }
  83
  84 #pragma mark - Private Methods
  85
  86 + (BOOL)shouldUseFullSizeContentViewForStyle:(NSUInteger)windowStyle {
  87   return windowStyle & NSTitledWindowMask;
  88 }
  89
  90 #pragma mark - NSWindow Overrides
  91
  92 + (NSRect)frameRectForContentRect:(NSRect)cRect styleMask:(NSUInteger)aStyle {
  93   if ([self shouldUseFullSizeContentViewForStyle:aStyle])
  94     return cRect;
  95   return [super frameRectForContentRect:cRect styleMask:aStyle];
  96 }
  97
  98 - (NSRect)frameRectForContentRect:(NSRect)contentRect {
  99   if (chromeWindowView_)
 100     return contentRect;
 101   return [super frameRectForContentRect:contentRect];
 102 }
 103
 104 + (NSRect)contentRectForFrameRect:(NSRect)fRect styleMask:(NSUInteger)aStyle {
 105   if ([self shouldUseFullSizeContentViewForStyle:aStyle])
 106     return fRect;
 107   return [super contentRectForFrameRect:fRect styleMask:aStyle];
 108 }
 109
 110 - (NSRect)contentRectForFrameRect:(NSRect)frameRect {
 111   if (chromeWindowView_)
 112     return frameRect;
 113   return [super contentRectForFrameRect:frameRect];
 114 }
 115
 116 @end