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