components/html_viewer/html_widget.h

   1 // Copyright 2015 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 #ifndef COMPONENTS_HTML_VIEWER_HTML_WIDGET_H_
   6 #define COMPONENTS_HTML_VIEWER_HTML_WIDGET_H_
   7
   8 #include "third_party/WebKit/public/web/WebViewClient.h"
   9 #include "third_party/WebKit/public/web/WebWidgetClient.h"
  10
  11 namespace blink {
  12 class WebFrameWidget;
  13 }
  14
  15 namespace mojo {
  16 class ApplicationImpl;
  17 }
  18
  19 namespace mus {
  20 class View;
  21 }
  22
  23 namespace html_viewer {
  24
  25 class GlobalState;
  26 class ImeController;
  27 class WebLayerTreeViewImpl;
  28
  29 // HTMLWidget is responsible for creation of the WebWidget. Which WebWidget
  30 // and how it is created depends upon the frame the WebWidget is created for.
  31 class HTMLWidget {
  32  public:
  33   virtual ~HTMLWidget() {}
  34
  35   virtual blink::WebWidget* GetWidget() = 0;
  36
  37   virtual void OnViewBoundsChanged(mus::View* view) = 0;
  38 };
  39
  40 // Used for the root frame when the root frame is remote.
  41 class HTMLWidgetRootRemote : public HTMLWidget {
  42  public:
  43   HTMLWidgetRootRemote();
  44   ~HTMLWidgetRootRemote() override;
  45
  46  private:
  47   // HTMLWidget:
  48   blink::WebWidget* GetWidget() override;
  49   void OnViewBoundsChanged(mus::View* view) override;
  50
  51   blink::WebView* web_view_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(HTMLWidgetRootRemote);
  54 };
  55
  56 // Used for the root frame when the frame is local. If there is only one
  57 // frame in the document, this is the HTMLWidget type created.
  58 class HTMLWidgetRootLocal : public HTMLWidget, public blink::WebViewClient {
  59  public:
  60   struct CreateParams {
  61     CreateParams(mojo::ApplicationImpl* app,
  62                  GlobalState* global_state,
  63                  mus::View* view);
  64     ~CreateParams();
  65
  66     mojo::ApplicationImpl* app;
  67     GlobalState* global_state;
  68     mus::View* view;
  69   };
  70
  71   HTMLWidgetRootLocal(CreateParams* create_params);
  72   ~HTMLWidgetRootLocal() override;
  73
  74   blink::WebView* web_view() { return web_view_; }
  75
  76  protected:
  77   // WebViewClient methods:
  78   virtual blink::WebStorageNamespace* createSessionStorageNamespace();
  79   virtual void initializeLayerTreeView();
  80   virtual blink::WebLayerTreeView* layerTreeView();
  81   virtual void didFirstVisuallyNonEmptyLayout();
  82   virtual void resetInputMethod();
  83   virtual void didHandleGestureEvent(const blink::WebGestureEvent& event,
  84                                      bool event_cancelled);
  85   virtual void didUpdateTextOfFocusedElementByNonUserInput();
  86   virtual void showImeIfNeeded();
  87
  88  private:
  89   // HTMLWidget:
  90   blink::WebWidget* GetWidget() override;
  91   void OnViewBoundsChanged(mus::View* view) override;
  92
  93   mojo::ApplicationImpl* app_;
  94   GlobalState* global_state_;
  95   mus::View* view_;
  96   blink::WebView* web_view_;
  97   scoped_ptr<WebLayerTreeViewImpl> web_layer_tree_view_impl_;
  98   scoped_ptr<ImeController> ime_controller_;
  99
 100   DISALLOW_COPY_AND_ASSIGN(HTMLWidgetRootLocal);
 101 };
 102
 103 // Used for frames other than the root that are local.
 104 class HTMLWidgetLocalRoot : public HTMLWidget, public blink::WebWidgetClient {
 105  public:
 106   HTMLWidgetLocalRoot(mojo::ApplicationImpl* app,
 107                       GlobalState* global_state,
 108                       mus::View* view,
 109                       blink::WebLocalFrame* web_local_frame);
 110   ~HTMLWidgetLocalRoot() override;
 111
 112  private:
 113   // HTMLWidget:
 114   blink::WebWidget* GetWidget() override;
 115   void OnViewBoundsChanged(mus::View* view) override;
 116
 117   // WebWidgetClient:
 118   virtual void initializeLayerTreeView();
 119   virtual blink::WebLayerTreeView* layerTreeView();
 120   virtual void resetInputMethod();
 121   virtual void didHandleGestureEvent(const blink::WebGestureEvent& event,
 122                                      bool event_cancelled);
 123   virtual void didUpdateTextOfFocusedElementByNonUserInput();
 124   virtual void showImeIfNeeded();
 125
 126   mojo::ApplicationImpl* app_;
 127   GlobalState* global_state_;
 128   blink::WebFrameWidget* web_frame_widget_;
 129   scoped_ptr<WebLayerTreeViewImpl> web_layer_tree_view_impl_;
 130   scoped_ptr<ImeController> ime_controller_;
 131
 132   DISALLOW_COPY_AND_ASSIGN(HTMLWidgetLocalRoot);
 133 };
 134
 135 }  // namespace html_viewer
 136
 137 #endif  // COMPONENTS_HTML_VIEWER_HTML_WIDGET_H_