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