Constrained window sheet controller (test patch)

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

+// Copyright (c) 2012 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.
+
+#include "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_info.h"
+#include "ui/base/cocoa/window_size_constants.h"
+
+@implementation ConstrainedWindowSheetInfo
+
+- (id)initWithSheet:(NSWindow*)sheet
+         parentView:(NSView*)parentView
+      overlayWindow:(NSWindow*)overlayWindow {
+  if ((self = [super init])) {
+    sheet_.reset([sheet retain]);
+    parentView_.reset([parentView retain]);
+    overlayWindow_.reset([overlayWindow retain]);
+  }
+  return self;
+}
+
+- (NSWindow*)sheet {
+  return sheet_;
+}
+
+- (NSView*)parentView {
+  return parentView_;
+}
+
+- (NSWindow*)overlayWindow {
+  return overlayWindow_;
+}
+
+- (void)setAnimation:(NSAnimation*)animation {
+  animation_.reset([animation retain]);
+}
+
+- (NSAnimation*)animation {
+  return animation_;
+}
+
+- (void)hideSheet {
+  // Stop any pending animations.
+  [animation_ stopAnimation];
+  animation_.reset();
+
+  // Hide the sheet by setting alpha to 0 and sizing it to 1x1. This is better
+  // than calling orderOut: because that could cause Spaces activation or
+  // window ordering changes.
+  [sheet_ setAlphaValue:0.0];
+  oldSheetAutoresizesSubviews_ = [[sheet_ contentView] autoresizesSubviews];
+  [[sheet_ contentView] setAutoresizesSubviews:NO];
+  NSRect overlayFrame = [overlayWindow_ frame];
+  oldSheetFrame_ = NSOffsetRect(
+      [sheet_ frame], -overlayFrame.origin.x, -overlayFrame.origin.y);
+  [sheet_ setFrame:ui::kWindowSizeDeterminedLater display:NO];
+
+  // Overlay window is already invisible so just stop accepting mouse events.
+  [overlayWindow_ setIgnoresMouseEvents:YES];
+
+  // Make sure the now invisible sheet doesn't keep keyboard focus
+  [[overlayWindow_ parentWindow] makeKeyWindow];
+}
+
+- (void)showSheet {
+  [overlayWindow_ setIgnoresMouseEvents:NO];
+
+  NSRect overlayFrame = [overlayWindow_ frame];
+  NSRect newSheetFrame = NSOffsetRect(
+      oldSheetFrame_, overlayFrame.origin.x, overlayFrame.origin.y);
+  [sheet_ setFrame:newSheetFrame display:NO];
+  [[sheet_ contentView] setAutoresizesSubviews:oldSheetAutoresizesSubviews_];
+  [sheet_ setAlphaValue:1.0];
+
+  [overlayWindow_ makeKeyWindow];
+}
+
+@end