android_webview/browser/renderer_host/aw_render_view_host_ext.h

   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 #ifndef ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
   6 #define ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
   7
   8 #include "content/public/browser/web_contents_observer.h"
   9
  10 #include "android_webview/common/aw_hit_test_data.h"
  11 #include "base/callback_forward.h"
  12 #include "base/threading/non_thread_safe.h"
  13 #include "third_party/skia/include/core/SkColor.h"
  14 #include "ui/gfx/size.h"
  15
  16 class GURL;
  17
  18 namespace content {
  19 struct FrameNavigateParams;
  20 struct LoadCommittedDetails;
  21 }  // namespace content
  22
  23 namespace android_webview {
  24
  25 class AwRenderViewHostExtClient {
  26  public:
  27   // Called when the RenderView page scale changes.
  28   virtual void OnWebLayoutPageScaleFactorChanged(float page_scale_factor) = 0;
  29   virtual void OnWebLayoutContentsSizeChanged(
  30       const gfx::Size& contents_size) = 0;
  31
  32  protected:
  33   virtual ~AwRenderViewHostExtClient() {}
  34 };
  35
  36 // Provides RenderViewHost wrapper functionality for sending WebView-specific
  37 // IPC messages to the renderer and from there to WebKit.
  38 class AwRenderViewHostExt : public content::WebContentsObserver,
  39                             public base::NonThreadSafe {
  40  public:
  41
  42   // To send receive messages to a RenderView we take the WebContents instance,
  43   // as it internally handles RenderViewHost instances changing underneath us.
  44   AwRenderViewHostExt(
  45       AwRenderViewHostExtClient* client, content::WebContents* contents);
  46   virtual ~AwRenderViewHostExt();
  47
  48   // |result| will be invoked with the outcome of the request.
  49   typedef base::Callback<void(bool)> DocumentHasImagesResult;
  50   void DocumentHasImages(DocumentHasImagesResult result);
  51
  52   // Clear all WebCore memory cache (not only for this view).
  53   void ClearCache();
  54
  55   // Do a hit test at the view port coordinates and asynchronously update
  56   // |last_hit_test_data_|. |view_x| and |view_y| are in density independent
  57   // pixels used by blink::WebView.
  58   void RequestNewHitTestDataAt(int view_x, int view_y);
  59
  60   // Optimization to avoid unnecessary Java object creation on hit test.
  61   bool HasNewHitTestData() const;
  62   void MarkHitTestDataRead();
  63
  64   // Return |last_hit_test_data_|. Note that this is unavoidably racy;
  65   // the corresponding public WebView API is as well.
  66   const AwHitTestData& GetLastHitTestData() const;
  67
  68   // Sets the zoom factor for text only. Used in layout modes other than
  69   // Text Autosizing.
  70   void SetTextZoomFactor(float factor);
  71
  72   void SetFixedLayoutSize(const gfx::Size& size);
  73
  74   void ResetScrollAndScaleState();
  75
  76   // Sets the initial page scale. This overrides initial scale set by
  77   // the meta viewport tag.
  78   void SetInitialPageScale(double page_scale_factor);
  79   void SetBackgroundColor(SkColor c);
  80   void SetJsOnlineProperty(bool network_up);
  81
  82   void SendCheckRenderThreadResponsiveness();
  83
  84  private:
  85   // content::WebContentsObserver implementation.
  86   virtual void RenderViewCreated(content::RenderViewHost* view_host) OVERRIDE;
  87   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
  88   virtual void DidNavigateAnyFrame(
  89       const content::LoadCommittedDetails& details,
  90       const content::FrameNavigateParams& params) OVERRIDE;
  91   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  92
  93   void OnDocumentHasImagesResponse(int msg_id, bool has_images);
  94   void OnUpdateHitTestData(const AwHitTestData& hit_test_data);
  95   void OnPageScaleFactorChanged(float page_scale_factor);
  96   void OnContentsSizeChanged(const gfx::Size& contents_size);
  97
  98   bool IsRenderViewReady() const;
  99
 100   AwRenderViewHostExtClient* client_;
 101
 102   SkColor background_color_;
 103
 104   std::map<int, DocumentHasImagesResult> pending_document_has_images_requests_;
 105
 106   // Master copy of hit test data on the browser side. This is updated
 107   // as a result of DoHitTest called explicitly or when the FocusedNodeChanged
 108   // is called in AwRenderViewExt.
 109   AwHitTestData last_hit_test_data_;
 110
 111   bool has_new_hit_test_data_;
 112
 113   DISALLOW_COPY_AND_ASSIGN(AwRenderViewHostExt);
 114 };
 115
 116 }  // namespace android_webview
 117
 118 #endif  // ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_