MacViews: Remove constrained window dependencies for certificate viewer.

chrome/browser/ui/cocoa/web_contents_modal_dialog_manager_views_mac.mm

-// Copyright 2015 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/ui/cocoa/web_contents_modal_dialog_manager_views_mac.h"
-
-#import <Cocoa/Cocoa.h>
-
-#import "base/mac/foundation_util.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
-#include "content/public/browser/web_contents.h"
-#include "components/web_modal/web_contents_modal_dialog_host.h"
-#import "ui/base/cocoa/constrained_window/constrained_window_animation.h"
-#include "ui/views/widget/widget.h"
-
-// A wrapper for a views::Widget dialog to interact with a Cocoa browser's
-// ContrainedWindowSheetController. Similar to CustomConstrainedWindowSheet, but
-// since Widgets of dialog type animate themselves, and also manage their own
-// parenting, there's not much to do except position properly.
-@interface WrappedConstrainedWindowSheet : NSObject<ConstrainedWindowSheet> {
- @private
-  base::scoped_nsobject<NSWindow> customWindow_;
-}
-- (id)initWithCustomWindow:(NSWindow*)customWindow;
-@end
-
-@implementation WrappedConstrainedWindowSheet
-
-- (id)initWithCustomWindow:(NSWindow*)customWindow {
-  if ((self = [super init])) {
-    customWindow_.reset([customWindow retain]);
-  }
-  return self;
-}
-
-// ConstrainedWindowSheet implementation.
-
-- (void)showSheetForWindow:(NSWindow*)window {
-  // This is only called for the initial show, then calls go to unhideSheet.
-  // Since Widget::Show() will be called, just update the position.
-  [self updateSheetPosition];
-}
-
-- (void)closeSheetWithAnimation:(BOOL)withAnimation {
-  // Nothing to do here. Either SingleWebContentsDialogManagerViewsMac::Close()
-  // was called or Widget::Close(). Both cases ending up in OnWidgetClosing() to
-  // call [ConstrainedWindowSheetController closeSheet:], which calls this.
-  // However, the Widget is already closing in those cases.
-
-  // OnWidgetClosing() is also the _only_ trigger. The exception would be
-  // -[ConstrainedWindowSheetController onParentWindowWillClose:] which also
-  // calls closeSheetWithAnimation:, but a Widget never gets there because
-  // WebContentsModalDialogManager::CloseAllDialogs() is triggered from
-  // -[BrowserWindowController windowShouldClose:], but the notification that
-  // calls onParentWindowWillClose always happens once that has returned YES.
-
-  // So, since onParentWindowWillClose never calls this, we can assert that
-  // withAnimation is YES, otherwise there's some code path that might not be
-  // catered for.
-  DCHECK(withAnimation);
-}
-
-- (void)hideSheet {
-  // Hide the sheet window by setting the alpha to 0. This technique is used
-  // instead of -orderOut: because that may cause a Spaces change or window
-  // ordering change.
-  [customWindow_ setAlphaValue:0.0];
-  // TODO(tapted): Support child windows.
-  DCHECK_EQ(0u, [[customWindow_ childWindows] count]);
-}
-
-- (void)unhideSheet {
-  [customWindow_ setAlphaValue:1.0];
-  DCHECK_EQ(0u, [[customWindow_ childWindows] count]);
-}
-
-- (void)pulseSheet {
-  base::scoped_nsobject<NSAnimation> animation(
-      [[ConstrainedWindowAnimationPulse alloc] initWithWindow:customWindow_]);
-  [animation startAnimation];
-}
-
-- (void)makeSheetKeyAndOrderFront {
-  // If the window is not visible, do nothing. Widget::Show() is responsible for
-  // showing, and it may want to animate it.
-  if ([customWindow_ isVisible])
-    [customWindow_ makeKeyAndOrderFront:nil];
-}
-
-- (void)updateSheetPosition {
-  ConstrainedWindowSheetController* controller =
-      [ConstrainedWindowSheetController controllerForSheet:self];
-  NSPoint origin = [controller originForSheet:self
-                               withWindowSize:[customWindow_ frame].size];
-  [customWindow_ setFrameOrigin:origin];
-}
-
-- (void)resizeWithNewSize:(NSSize)size {
-  // NOOP
-}
-
-- (NSWindow*)sheetWindow {
-  return customWindow_;
-}
-
-@end
-
-SingleWebContentsDialogManagerViewsMac::SingleWebContentsDialogManagerViewsMac(
-    NSWindow* dialog,
-    web_modal::SingleWebContentsDialogManagerDelegate* delegate)
-    : delegate_(delegate), host_(nullptr) {
-  sheet_.reset(
-      [[WrappedConstrainedWindowSheet alloc] initWithCustomWindow:dialog]);
-  widget_ = views::Widget::GetWidgetForNativeWindow(dialog);
-  DCHECK(widget_);
-  widget_->AddObserver(this);
-}
-
-SingleWebContentsDialogManagerViewsMac::
-    ~SingleWebContentsDialogManagerViewsMac() {
-  DCHECK(!widget_->HasObserver(this));
-}
-
-void SingleWebContentsDialogManagerViewsMac::Show() {
-  DCHECK(host_);
-
-  NSView* parent_view = host_->GetHostView();
-  // Note that simply [parent_view window] for an inactive tab is nil. However,
-  // the following should always be non-nil for all WebContents containers.
-  NSWindow* parent_window =
-      delegate_->GetWebContents()->GetTopLevelNativeWindow();
-  // Register with the ConstrainedWindowSheetController. This ensures that, e.g.
-  // the NSView that overlays the Cocoa WebContents to intercept clicks is
-  // installed and managed.
-  [[ConstrainedWindowSheetController controllerForParentWindow:parent_window]
-          showSheet:sheet_
-      forParentView:parent_view];
-
-  if (!widget_->IsVisible())
-    widget_->Show();
-}
-
-void SingleWebContentsDialogManagerViewsMac::Hide() {
-  NSWindow* parent_window =
-      delegate_->GetWebContents()->GetTopLevelNativeWindow();
-  [[ConstrainedWindowSheetController controllerForParentWindow:parent_window]
-      hideSheet];
-}
-
-void SingleWebContentsDialogManagerViewsMac::Close() {
-  // When the WebContents is destroyed, WebContentsModalDialogManager
-  // ::CloseAllDialogs will call this. Close the Widget in the same manner as
-  // the dialogs so that codepaths are consistent.
-  widget_->Close();  // Note: Synchronously calls OnWidgetClosing() below.
-}
-
-void SingleWebContentsDialogManagerViewsMac::Focus() {
-  // Handled by ConstrainedWindowSheetController.
-}
-void SingleWebContentsDialogManagerViewsMac::Pulse() {
-  // Handled by ConstrainedWindowSheetController.
-}
-
-void SingleWebContentsDialogManagerViewsMac::HostChanged(
-    web_modal::WebContentsModalDialogHost* new_host) {
-  // No need to observe the host. For Cocoa, the constrained window controller
-  // will reposition the dialog when necessary. The host can also never change.
-  // Tabs showing a dialog can not be dragged off a Cocoa browser window.
-  // However, closing a tab with a dialog open will set the host back to null.
-  DCHECK_NE(!!host_, !!new_host);
-  host_ = new_host;
-}
-
-gfx::NativeWindow SingleWebContentsDialogManagerViewsMac::dialog() {
-  return [sheet_ sheetWindow];
-}
-
-// views::WidgetObserver:
-void SingleWebContentsDialogManagerViewsMac::OnWidgetClosing(
-    views::Widget* widget) {
-  DCHECK_EQ(widget, widget_);
-  widget->RemoveObserver(this);
-  [[ConstrainedWindowSheetController controllerForSheet:sheet_]
-      closeSheet:sheet_];
-  delegate_->WillClose(dialog());  // Deletes |this|.
-}
-
-void SingleWebContentsDialogManagerViewsMac::OnWidgetDestroying(
-    views::Widget* widget) {
-  // On Mac, this would only be reached if something called -[NSWindow close]
-  // on the dialog without going through Widget::Close or CloseNow(). Since
-  // dialogs have no titlebar, it won't come from the system. If something
-  // internally calls -[NSWindow close] it might break lifetime assumptions
-  // made by DialogDelegate.
-  NOTREACHED();
-}