chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_window.mm

   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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_window.h"
   6
   7 #import "base/mac/scoped_nsobject.h"
   8 #import "chrome/browser/ui/chrome_style.h"
   9 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
  10 #include "skia/ext/skia_utils_mac.h"
  11 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
  12
  13 @implementation ConstrainedWindowCustomWindow
  14
  15 - (id)initWithContentRect:(NSRect)contentRect {
  16   return [self initWithContentRect:contentRect
  17                          styleMask:NSBorderlessWindowMask];
  18 }
  19
  20 - (id)initWithContentRect:(NSRect)contentRect
  21                 styleMask:(NSUInteger)windowStyle {
  22   if ((self = [self initWithContentRect:contentRect
  23                               styleMask:windowStyle
  24                                 backing:NSBackingStoreBuffered
  25                                   defer:NO])) {
  26     base::scoped_nsobject<NSView> contentView(
  27         [[ConstrainedWindowCustomWindowContentView alloc]
  28             initWithFrame:NSZeroRect]);
  29     [self setContentView:contentView];
  30   }
  31   return self;
  32 }
  33
  34 - (id)initWithContentRect:(NSRect)contentRect
  35                 styleMask:(NSUInteger)windowStyle
  36                   backing:(NSBackingStoreType)bufferingType
  37                     defer:(BOOL)deferCreation {
  38   if ((self = [super initWithContentRect:contentRect
  39                                styleMask:windowStyle
  40                                  backing:bufferingType
  41                                    defer:NO])) {
  42     [self setHasShadow:YES];
  43     [self setBackgroundColor:gfx::SkColorToCalibratedNSColor(
  44         chrome_style::GetBackgroundColor())];
  45     [self setOpaque:NO];
  46     [self setReleasedWhenClosed:NO];
  47   }
  48   return self;
  49 }
  50
  51 - (BOOL)canBecomeKeyWindow {
  52   return YES;
  53 }
  54
  55 - (NSRect)frameRectForContentRect:(NSRect)windowContent {
  56   id<ConstrainedWindowSheet> sheet = [ConstrainedWindowSheetController
  57       sheetForOverlayWindow:[self parentWindow]];
  58   ConstrainedWindowSheetController* sheetController =
  59       [ConstrainedWindowSheetController controllerForSheet:sheet];
  60
  61   // Sheet controller may be nil if this window hasn't been shown yet.
  62   if (!sheetController)
  63     return windowContent;
  64
  65   NSRect frame;
  66   frame.origin = [sheetController originForSheet:sheet
  67                                   withWindowSize:windowContent.size];
  68   frame.size = windowContent.size;
  69   return frame;
  70 }
  71
  72 @end
  73
  74 @implementation ConstrainedWindowCustomWindowContentView
  75
  76 - (void)drawRect:(NSRect)rect {
  77   gfx::ScopedNSGraphicsContextSaveGState state;
  78
  79   // Draw symmetric difference between rect path and oval path as "clear".
  80   NSBezierPath* ovalPath = [NSBezierPath
  81       bezierPathWithRoundedRect:[self bounds]
  82                         xRadius:chrome_style::kBorderRadius
  83                         yRadius:chrome_style::kBorderRadius];
  84   NSBezierPath* path = [NSBezierPath bezierPathWithRect:[self bounds]];
  85   [path appendBezierPath:ovalPath];
  86   [path setWindingRule:NSEvenOddWindingRule];
  87   [[NSGraphicsContext currentContext] setCompositingOperation:
  88       NSCompositeCopy];
  89   [[NSColor clearColor] set];
  90   [path fill];
  91
  92   [[self window] invalidateShadow];
  93 }
  94
  95 @end