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#include "chrome/browser/ui/views/constrained_window_views.h" 6 7#include <algorithm> 8 9#include "chrome/browser/guest_view/web_view/web_view_guest.h" 10#include "chrome/browser/ui/browser_finder.h" 11#include "components/web_modal/web_contents_modal_dialog_host.h" 12#include "components/web_modal/web_contents_modal_dialog_manager.h" 13#include "components/web_modal/web_contents_modal_dialog_manager_delegate.h" 14#include "ui/views/border.h" 15#include "ui/views/widget/widget.h" 16#include "ui/views/widget/widget_observer.h" 17#include "ui/views/window/dialog_delegate.h" 18 19using web_modal::ModalDialogHost; 20using web_modal::ModalDialogHostObserver; 21 22namespace { 23// The name of a key to store on the window handle to associate 24// BrowserModalDialogHostObserverViews with the Widget. 25const char* const kBrowserModalDialogHostObserverViewsKey = 26 "__BROWSER_MODAL_DIALOG_HOST_OBSERVER_VIEWS__"; 27 28// Applies positioning changes from the ModalDialogHost to the Widget. 29class BrowserModalDialogHostObserverViews 30 : public views::WidgetObserver, 31 public ModalDialogHostObserver { 32 public: 33 BrowserModalDialogHostObserverViews(ModalDialogHost* host, 34 views::Widget* target_widget, 35 const char *const native_window_property) 36 : host_(host), 37 target_widget_(target_widget), 38 native_window_property_(native_window_property) { 39 DCHECK(host_); 40 DCHECK(target_widget_); 41 host_->AddObserver(this); 42 target_widget_->AddObserver(this); 43 } 44 45 virtual ~BrowserModalDialogHostObserverViews() { 46 if (host_) 47 host_->RemoveObserver(this); 48 target_widget_->RemoveObserver(this); 49 target_widget_->SetNativeWindowProperty(native_window_property_, NULL); 50 } 51 52 // WidgetObserver overrides 53 virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE { 54 delete this; 55 } 56 57 // WebContentsModalDialogHostObserver overrides 58 virtual void OnPositionRequiresUpdate() OVERRIDE { 59 UpdateBrowserModalDialogPosition(target_widget_, host_); 60 } 61 62 virtual void OnHostDestroying() OVERRIDE { 63 host_->RemoveObserver(this); 64 host_ = NULL; 65 } 66 67 private: 68 ModalDialogHost* host_; 69 views::Widget* target_widget_; 70 const char* const native_window_property_; 71 72 DISALLOW_COPY_AND_ASSIGN(BrowserModalDialogHostObserverViews); 73}; 74 75void UpdateModalDialogPosition(views::Widget* widget, 76 web_modal::ModalDialogHost* dialog_host, 77 const gfx::Size& size) { 78 // Do not forcibly update the dialog widget position if it is being dragged. 79 if (widget->HasCapture()) 80 return; 81 82 gfx::Point position = dialog_host->GetDialogPosition(size); 83 views::Border* border = widget->non_client_view()->frame_view()->border(); 84 // Border may be null during widget initialization. 85 if (border) { 86 // Align the first row of pixels inside the border. This is the apparent 87 // top of the dialog. 88 position.set_y(position.y() - border->GetInsets().top()); 89 } 90 91 if (widget->is_top_level()) { 92 position += 93 views::Widget::GetWidgetForNativeView(dialog_host->GetHostView())-> 94 GetClientAreaBoundsInScreen().OffsetFromOrigin(); 95 } 96 97 widget->SetBounds(gfx::Rect(position, size)); 98} 99 100} // namespace 101 102void UpdateWebContentsModalDialogPosition( 103 views::Widget* widget, 104 web_modal::WebContentsModalDialogHost* dialog_host) { 105 gfx::Size size = widget->GetRootView()->GetPreferredSize(); 106 gfx::Size max_size = dialog_host->GetMaximumDialogSize(); 107 // Enlarge the max size by the top border, as the dialog will be shifted 108 // outside the area specified by the dialog host by this amount later. 109 views::Border* border = 110 widget->non_client_view()->frame_view()->border(); 111 // Border may be null during widget initialization. 112 if (border) 113 max_size.Enlarge(0, border->GetInsets().top()); 114 size.SetToMin(max_size); 115 UpdateModalDialogPosition(widget, dialog_host, size); 116} 117 118void UpdateBrowserModalDialogPosition(views::Widget* widget, 119 web_modal::ModalDialogHost* dialog_host) { 120 UpdateModalDialogPosition(widget, dialog_host, 121 widget->GetRootView()->GetPreferredSize()); 122} 123 124views::Widget* ShowWebModalDialogViews( 125 views::WidgetDelegate* dialog, 126 content::WebContents* initiator_web_contents) { 127 WebViewGuest* web_view_guest = WebViewGuest::FromWebContents( 128 initiator_web_contents); 129 // For embedded WebContents, use the embedder's WebContents for constrained 130 // window. 131 content::WebContents* web_contents = 132 web_view_guest && web_view_guest->embedder_web_contents() ? 133 web_view_guest->embedder_web_contents() : initiator_web_contents; 134 views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents); 135 web_modal::WebContentsModalDialogManager::FromWebContents(web_contents)-> 136 ShowModalDialog(widget->GetNativeWindow()); 137 return widget; 138} 139 140views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog, 141 content::WebContents* web_contents) { 142 DCHECK_EQ(ui::MODAL_TYPE_CHILD, dialog->GetModalType()); 143 web_modal::WebContentsModalDialogManager* manager = 144 web_modal::WebContentsModalDialogManager::FromWebContents(web_contents); 145 const gfx::NativeWindow parent = 146 manager->delegate()->GetWebContentsModalDialogHost()->GetHostView(); 147 return views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent); 148} 149 150views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog, 151 gfx::NativeWindow parent) { 152 views::Widget* widget = 153 views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent); 154 if (!dialog->UseNewStyleForThisDialog()) 155 return widget; 156 157 // Get the browser dialog management and hosting components from |parent|. 158 Browser* browser = chrome::FindBrowserWithWindow(parent); 159 if (browser) { 160 ChromeWebModalDialogManagerDelegate* manager = browser; 161 ModalDialogHost* host = manager->GetWebContentsModalDialogHost(); 162 DCHECK_EQ(parent, host->GetHostView()); 163 ModalDialogHostObserver* dialog_host_observer = 164 new BrowserModalDialogHostObserverViews( 165 host, widget, kBrowserModalDialogHostObserverViewsKey); 166 dialog_host_observer->OnPositionRequiresUpdate(); 167 } 168 return widget; 169} 170