chrome/browser/ui/views/constrained_web_dialog_delegate_views.cc

   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/browser_finder.h"
   9 #include "chrome/browser/ui/browser_window.h"
  10 #include "chrome/browser/ui/webui/chrome_web_contents_handler.h"
  11 #include "components/constrained_window/constrained_window_views.h"
  12 #include "components/web_modal/web_contents_modal_dialog_manager.h"
  13 #include "content/public/browser/native_web_keyboard_event.h"
  14 #include "content/public/browser/render_view_host.h"
  15 #include "content/public/browser/web_contents.h"
  16 #include "ui/views/controls/webview/unhandled_keyboard_event_handler.h"
  17 #include "ui/views/controls/webview/webview.h"
  18 #include "ui/views/view.h"
  19 #include "ui/views/widget/widget.h"
  20 #include "ui/views/window/dialog_delegate.h"
  21 #include "ui/web_dialogs/web_dialog_delegate.h"
  22 #include "ui/web_dialogs/web_dialog_ui.h"
  23
  24 namespace {
  25
  26 // WebContentsObserver that tracks the lifetime of the WebContents to avoid
  27 // potential use after destruction.
  28 class InitiatorWebContentsObserver
  29     : public content::WebContentsObserver {
  30   public:
  31    explicit InitiatorWebContentsObserver(content::WebContents* web_contents)
  32       : content::WebContentsObserver(web_contents) {
  33    }
  34
  35   private:
  36     DISALLOW_COPY_AND_ASSIGN(InitiatorWebContentsObserver);
  37 };
  38
  39 class WebDialogWebContentsDelegateViews
  40     : public ui::WebDialogWebContentsDelegate {
  41  public:
  42   WebDialogWebContentsDelegateViews(content::BrowserContext* browser_context,
  43                                     InitiatorWebContentsObserver* observer,
  44                                     views::WebView* web_view)
  45       : ui::WebDialogWebContentsDelegate(browser_context,
  46                                          new ChromeWebContentsHandler()),
  47         initiator_observer_(observer),
  48         web_view_(web_view) {
  49   }
  50   ~WebDialogWebContentsDelegateViews() override {}
  51
  52   // ui::WebDialogWebContentsDelegate:
  53   void HandleKeyboardEvent(
  54       content::WebContents* source,
  55       const content::NativeWebKeyboardEvent& event) override {
  56     // Forward shortcut keys in dialog to our initiator's delegate.
  57     // http://crbug.com/104586
  58     // Disabled on Mac due to http://crbug.com/112173
  59 #if !defined(OS_MACOSX)
  60     if (!initiator_observer_->web_contents())
  61       return;
  62
  63     auto delegate = initiator_observer_->web_contents()->GetDelegate();
  64     if (!delegate)
  65       return;
  66     delegate->HandleKeyboardEvent(initiator_observer_->web_contents(), event);
  67 #endif
  68   }
  69
  70   void ResizeDueToAutoResize(content::WebContents* source,
  71                              const gfx::Size& preferred_size) override {
  72     if (source != web_view_->GetWebContents())
  73       return;
  74
  75     if (!initiator_observer_->web_contents())
  76       return;
  77
  78     // Sets WebView's preferred size based on auto-resized contents.
  79     web_view_->SetPreferredSize(preferred_size);
  80
  81     constrained_window::UpdateWebContentsModalDialogPosition(
  82         web_view_->GetWidget(),
  83         web_modal::WebContentsModalDialogManager::FromWebContents(
  84             initiator_observer_->web_contents())->delegate()->
  85                 GetWebContentsModalDialogHost());
  86   }
  87
  88  private:
  89   InitiatorWebContentsObserver* const initiator_observer_;
  90   views::WebView* web_view_;
  91
  92   DISALLOW_COPY_AND_ASSIGN(WebDialogWebContentsDelegateViews);
  93 };
  94
  95 class ConstrainedWebDialogDelegateViews
  96     : public ConstrainedWebDialogDelegateBase {
  97  public:
  98   ConstrainedWebDialogDelegateViews(content::BrowserContext* context,
  99                                     ui::WebDialogDelegate* delegate,
 100                                     InitiatorWebContentsObserver* observer,
 101                                     views::WebView* view)
 102       : ConstrainedWebDialogDelegateBase(context, delegate,
 103             new WebDialogWebContentsDelegateViews(context, observer, view)),
 104         view_(view) {}
 105
 106   ~ConstrainedWebDialogDelegateViews() override {}
 107
 108   // ui::WebDialogWebContentsDelegate:
 109   void CloseContents(content::WebContents* source) override {
 110     view_->GetWidget()->Close();
 111   }
 112
 113   // contents::WebContentsDelegate:
 114   void HandleKeyboardEvent(
 115       content::WebContents* source,
 116       const content::NativeWebKeyboardEvent& event) override {
 117     unhandled_keyboard_event_handler_.HandleKeyboardEvent(
 118         event, view_->GetFocusManager());
 119   }
 120
 121   // ConstrainedWebDialogDelegate:
 122   gfx::NativeWindow GetNativeDialog() override {
 123     return view_->GetWidget()->GetNativeWindow();
 124   }
 125
 126  private:
 127   // Converts keyboard events on the WebContents to accelerators.
 128   views::UnhandledKeyboardEventHandler unhandled_keyboard_event_handler_;
 129
 130   views::WebView* view_;
 131
 132   DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateViews);
 133 };
 134
 135 class ConstrainedWebDialogDelegateViewViews
 136     : public views::WebView,
 137       public ConstrainedWebDialogDelegate,
 138       public views::WidgetDelegate {
 139  public:
 140   ConstrainedWebDialogDelegateViewViews(
 141       content::BrowserContext* browser_context,
 142       ui::WebDialogDelegate* delegate,
 143       content::WebContents* web_contents,
 144       const gfx::Size& min_size,
 145       const gfx::Size& max_size)
 146       : views::WebView(browser_context),
 147         initiator_observer_(web_contents),
 148         impl_(new ConstrainedWebDialogDelegateViews(browser_context, delegate,
 149                                                     &initiator_observer_,
 150                                                     this)),
 151         min_size_(min_size),
 152         max_size_(max_size) {
 153     SetWebContents(GetWebContents());
 154     AddAccelerator(ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE));
 155   }
 156   ~ConstrainedWebDialogDelegateViewViews() override {}
 157
 158   // ConstrainedWebDialogDelegate:
 159   const ui::WebDialogDelegate* GetWebDialogDelegate() const override {
 160     return impl_->GetWebDialogDelegate();
 161   }
 162   ui::WebDialogDelegate* GetWebDialogDelegate() override {
 163     return impl_->GetWebDialogDelegate();
 164   }
 165   void OnDialogCloseFromWebUI() override {
 166     return impl_->OnDialogCloseFromWebUI();
 167   }
 168   void ReleaseWebContentsOnDialogClose() override {
 169     return impl_->ReleaseWebContentsOnDialogClose();
 170   }
 171   gfx::NativeWindow GetNativeDialog() override {
 172     return impl_->GetNativeDialog();
 173   }
 174   content::WebContents* GetWebContents() override {
 175     return impl_->GetWebContents();
 176   }
 177
 178   // views::WidgetDelegate:
 179   views::View* GetInitiallyFocusedView() override { return this; }
 180   void WindowClosing() override {
 181     if (!impl_->closed_via_webui())
 182       GetWebDialogDelegate()->OnDialogClosed(std::string());
 183   }
 184   views::Widget* GetWidget() override { return View::GetWidget(); }
 185   const views::Widget* GetWidget() const override { return View::GetWidget(); }
 186   base::string16 GetWindowTitle() const override {
 187     return impl_->closed_via_webui() ? base::string16() :
 188         GetWebDialogDelegate()->GetDialogTitle();
 189   }
 190   views::View* GetContentsView() override { return this; }
 191   views::NonClientFrameView* CreateNonClientFrameView(
 192       views::Widget* widget) override {
 193     return views::DialogDelegate::CreateDialogFrameView(widget);
 194   }
 195   bool ShouldShowCloseButton() const override {
 196     // No close button if the dialog doesn't want a title bar.
 197     return impl_->GetWebDialogDelegate()->ShouldShowDialogTitle();
 198   }
 199   ui::ModalType GetModalType() const override { return ui::MODAL_TYPE_CHILD; }
 200
 201   // views::WebView:
 202   bool AcceleratorPressed(const ui::Accelerator& accelerator) override {
 203     // Pressing ESC closes the dialog.
 204     DCHECK_EQ(ui::VKEY_ESCAPE, accelerator.key_code());
 205     GetWidget()->Close();
 206     return true;
 207   }
 208   gfx::Size GetPreferredSize() const override {
 209     gfx::Size size;
 210     if (!impl_->closed_via_webui()) {
 211       // The size is set here if the dialog has been auto-resized in
 212       // WebDialogWebContentsDelegateViews's ResizeDueToAutoResize.
 213       size = WebView::GetPreferredSize();
 214       if (size.IsEmpty()) {
 215         // The size set here if the dialog has not been auto-resized or
 216         // auto-resizable is not enabled.
 217         GetWebDialogDelegate()->GetDialogSize(&size);
 218       }
 219     }
 220     return size;
 221   }
 222   gfx::Size GetMinimumSize() const override {
 223     return min_size_;
 224   }
 225   gfx::Size GetMaximumSize() const override {
 226     return !max_size_.IsEmpty() ? max_size_ : WebView::GetMaximumSize();
 227   }
 228   void RenderViewCreated(content::RenderViewHost* render_view_host) override {
 229     if (!max_size_.IsEmpty())
 230       EnableAutoResize();
 231   }
 232   void RenderViewHostChanged(content::RenderViewHost* old_host,
 233                              content::RenderViewHost* new_host) override {
 234     if (!max_size_.IsEmpty())
 235       EnableAutoResize();
 236   }
 237   void DocumentOnLoadCompletedInMainFrame() override {
 238     if (!max_size_.IsEmpty()) {
 239       EnableAutoResize();
 240       if (initiator_observer_.web_contents()) {
 241         web_modal::WebContentsModalDialogManager::FromWebContents(
 242             initiator_observer_.web_contents())
 243             ->ShowModalDialog(GetWidget()->GetNativeWindow());
 244       }
 245     }
 246   }
 247
 248  private:
 249   void EnableAutoResize() {
 250     content::RenderViewHost* render_view_host =
 251         GetWebContents()->GetRenderViewHost();
 252     render_view_host->EnableAutoResize(min_size_, max_size_);
 253   }
 254
 255   InitiatorWebContentsObserver initiator_observer_;
 256
 257   scoped_ptr<ConstrainedWebDialogDelegateViews> impl_;
 258
 259   // Minimum and maximum sizes to determine dialog bounds for auto-resizing.
 260   const gfx::Size min_size_;
 261   const gfx::Size max_size_;
 262
 263   DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateViewViews);
 264 };
 265
 266 }  // namespace
 267
 268 ConstrainedWebDialogDelegate* ShowConstrainedWebDialog(
 269     content::BrowserContext* browser_context,
 270     ui::WebDialogDelegate* delegate,
 271     content::WebContents* web_contents) {
 272   ConstrainedWebDialogDelegateViewViews* dialog =
 273       new ConstrainedWebDialogDelegateViewViews(
 274           browser_context, delegate, web_contents,
 275           gfx::Size(), gfx::Size());
 276   constrained_window::ShowWebModalDialogViews(dialog, web_contents);
 277   return dialog;
 278 }
 279
 280 ConstrainedWebDialogDelegate* ShowConstrainedWebDialogWithAutoResize(
 281     content::BrowserContext* browser_context,
 282     ui::WebDialogDelegate* delegate,
 283     content::WebContents* web_contents,
 284     const gfx::Size& min_size,
 285     const gfx::Size& max_size) {
 286   DCHECK(!min_size.IsEmpty());
 287   DCHECK(!max_size.IsEmpty());
 288   ConstrainedWebDialogDelegateViewViews* dialog =
 289       new ConstrainedWebDialogDelegateViewViews(
 290           browser_context, delegate, web_contents,
 291           min_size, max_size);
 292   constrained_window::CreateWebModalDialogViews(dialog, web_contents);
 293   return dialog;
 294 }