constrained_web_dialog_delegate_views.cc revision 5f1c94371a64b3196d4be9466099bb892df9b88e 
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/webui/constrained_web_dialog_delegate_base.h"
6
7#include "base/strings/utf_string_conversions.h"
8#include "chrome/browser/ui/views/constrained_window_views.h"
9#include "content/public/browser/native_web_keyboard_event.h"
10#include "content/public/browser/web_contents.h"
11#include "ui/views/controls/webview/unhandled_keyboard_event_handler.h"
12#include "ui/views/controls/webview/webview.h"
13#include "ui/views/widget/widget.h"
14#include "ui/views/window/dialog_delegate.h"
15#include "ui/web_dialogs/web_dialog_delegate.h"
16#include "ui/web_dialogs/web_dialog_ui.h"
17
18#if defined(USE_AURA)
19#include "content/public/browser/render_widget_host_view.h"
20#include "ui/aura/client/focus_change_observer.h"
21#include "ui/aura/client/focus_client.h"
22#endif
23
24using ui::WebDialogDelegate;
25using ui::WebDialogWebContentsDelegate;
26
27namespace {
28
29class ConstrainedWebDialogDelegateViews
30    : public ConstrainedWebDialogDelegateBase {
31 public:
32  ConstrainedWebDialogDelegateViews(content::BrowserContext* context,
33                                    WebDialogDelegate* delegate,
34                                    WebDialogWebContentsDelegate* tab_delegate,
35                                    views::WebView* view)
36      : ConstrainedWebDialogDelegateBase(context, delegate, tab_delegate),
37        view_(view) {}
38
39  virtual ~ConstrainedWebDialogDelegateViews() {}
40
41  // WebDialogWebContentsDelegate:
42  virtual void CloseContents(content::WebContents* source) OVERRIDE {
43    view_->GetWidget()->Close();
44  }
45
46  // contents::WebContentsDelegate:
47  virtual void HandleKeyboardEvent(
48      content::WebContents* source,
49      const content::NativeWebKeyboardEvent& event) OVERRIDE {
50    unhandled_keyboard_event_handler_.HandleKeyboardEvent(
51        event, view_->GetFocusManager());
52  }
53
54  // ConstrainedWebDialogDelegate:
55  virtual web_modal::NativeWebContentsModalDialog GetNativeDialog() OVERRIDE {
56    return view_->GetWidget()->GetNativeView();
57  }
58
59 private:
60  // Converts keyboard events on the WebContents to accelerators.
61  views::UnhandledKeyboardEventHandler unhandled_keyboard_event_handler_;
62
63  views::WebView* view_;
64
65  DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateViews);
66};
67
68#if defined(USE_AURA)
69// TODO(msw): Make this part of WebView? Modify various WebContentsDelegates?
70class WebViewFocusHelper : public aura::client::FocusChangeObserver {
71 public:
72  explicit WebViewFocusHelper(views::WebView* web_view)
73      : web_view_(web_view),
74        window_(NULL),
75        focus_client_(NULL) {
76    if (web_view_ && web_view_->web_contents()) {
77      content::RenderWidgetHostView* host_view =
78          web_view_->web_contents()->GetRenderWidgetHostView();
79      window_ = host_view ? host_view->GetNativeView() : NULL;
80    }
81    focus_client_ = window_ ? aura::client::GetFocusClient(window_) : NULL;
82    if (focus_client_)
83      focus_client_->AddObserver(this);
84  }
85
86  virtual ~WebViewFocusHelper() {
87    if (focus_client_)
88      focus_client_->RemoveObserver(this);
89  }
90
91  virtual void OnWindowFocused(aura::Window* gained_focus,
92                               aura::Window* lost_focus) OVERRIDE {
93    if (gained_focus == window_ && !web_view_->HasFocus())
94      web_view_->RequestFocus();
95  }
96
97 private:
98  views::WebView* web_view_;
99  aura::Window* window_;
100  aura::client::FocusClient* focus_client_;
101
102  DISALLOW_COPY_AND_ASSIGN(WebViewFocusHelper);
103};
104#endif
105
106class ConstrainedWebDialogDelegateViewViews
107    : public views::WebView,
108      public ConstrainedWebDialogDelegate,
109      public views::WidgetDelegate {
110 public:
111  ConstrainedWebDialogDelegateViewViews(
112      content::BrowserContext* browser_context,
113      WebDialogDelegate* delegate,
114      WebDialogWebContentsDelegate* tab_delegate)
115      : views::WebView(browser_context),
116        impl_(new ConstrainedWebDialogDelegateViews(browser_context, delegate,
117                                                    tab_delegate, this)) {
118    SetWebContents(GetWebContents());
119    AddAccelerator(ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE));
120  }
121  virtual ~ConstrainedWebDialogDelegateViewViews() {}
122
123  // ConstrainedWebDialogDelegate:
124  virtual const WebDialogDelegate* GetWebDialogDelegate() const OVERRIDE {
125    return impl_->GetWebDialogDelegate();
126  }
127  virtual WebDialogDelegate* GetWebDialogDelegate() OVERRIDE {
128    return impl_->GetWebDialogDelegate();
129  }
130  virtual void OnDialogCloseFromWebUI() OVERRIDE {
131    return impl_->OnDialogCloseFromWebUI();
132  }
133  virtual void ReleaseWebContentsOnDialogClose() OVERRIDE {
134    return impl_->ReleaseWebContentsOnDialogClose();
135  }
136  virtual web_modal::NativeWebContentsModalDialog GetNativeDialog() OVERRIDE {
137    return impl_->GetNativeDialog();
138  }
139  virtual content::WebContents* GetWebContents() OVERRIDE {
140    return impl_->GetWebContents();
141  }
142
143  // views::WidgetDelegate:
144  virtual views::View* GetInitiallyFocusedView() OVERRIDE {
145    return this;
146  }
147  virtual void WindowClosing() OVERRIDE {
148    if (!impl_->closed_via_webui())
149      GetWebDialogDelegate()->OnDialogClosed(std::string());
150  }
151  virtual views::Widget* GetWidget() OVERRIDE {
152    return View::GetWidget();
153  }
154  virtual const views::Widget* GetWidget() const OVERRIDE {
155    return View::GetWidget();
156  }
157  virtual base::string16 GetWindowTitle() const OVERRIDE {
158    return impl_->closed_via_webui() ? base::string16() :
159        GetWebDialogDelegate()->GetDialogTitle();
160  }
161  virtual views::View* GetContentsView() OVERRIDE {
162    return this;
163  }
164  virtual views::NonClientFrameView* CreateNonClientFrameView(
165      views::Widget* widget) OVERRIDE {
166    return views::DialogDelegate::CreateDialogFrameView(widget);
167  }
168  virtual bool ShouldShowCloseButton() const OVERRIDE {
169    // No close button if the dialog doesn't want a title bar.
170    return impl_->GetWebDialogDelegate()->ShouldShowDialogTitle();
171  }
172  virtual ui::ModalType GetModalType() const OVERRIDE {
173    return ui::MODAL_TYPE_CHILD;
174  }
175
176  // views::WebView:
177  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE {
178    // Pressing ESC closes the dialog.
179    DCHECK_EQ(ui::VKEY_ESCAPE, accelerator.key_code());
180    GetWidget()->Close();
181    return true;
182  }
183  virtual gfx::Size GetPreferredSize() const OVERRIDE {
184    gfx::Size size;
185    if (!impl_->closed_via_webui())
186      GetWebDialogDelegate()->GetDialogSize(&size);
187    return size;
188  }
189  virtual gfx::Size GetMinimumSize() const OVERRIDE {
190    // Return an empty size so that we can be made smaller.
191    return gfx::Size();
192  }
193
194  void OnShow() {
195#if defined(USE_AURA)
196  web_view_focus_helper_.reset(new WebViewFocusHelper(this));
197#endif
198  }
199
200 private:
201  scoped_ptr<ConstrainedWebDialogDelegateViews> impl_;
202#if defined(USE_AURA)
203  scoped_ptr<WebViewFocusHelper> web_view_focus_helper_;
204#endif
205
206  DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateViewViews);
207};
208
209}  // namespace
210
211ConstrainedWebDialogDelegate* CreateConstrainedWebDialog(
212    content::BrowserContext* browser_context,
213    WebDialogDelegate* delegate,
214    WebDialogWebContentsDelegate* tab_delegate,
215    content::WebContents* web_contents) {
216  ConstrainedWebDialogDelegateViewViews* dialog =
217      new ConstrainedWebDialogDelegateViewViews(
218          browser_context, delegate, tab_delegate);
219  ShowWebModalDialogViews(dialog, web_contents);
220  dialog->OnShow();
221  return dialog;
222}
223