chrome/renderer/chrome_render_view_observer.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 CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_
   6 #define CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/memory/linked_ptr.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/timer/timer.h"
  16 #include "content/public/common/top_controls_state.h"
  17 #include "content/public/renderer/render_view_observer.h"
  18 #include "ui/gfx/geometry/size.h"
  19 #include "url/gurl.h"
  20
  21 class ContentSettingsObserver;
  22 class SkBitmap;
  23
  24 namespace blink {
  25 class WebView;
  26 struct WebWindowFeatures;
  27 }
  28
  29 namespace content {
  30 class RenderFrame;
  31 }
  32
  33 namespace safe_browsing {
  34 class PhishingClassifierDelegate;
  35 }
  36
  37 namespace translate {
  38 class TranslateHelper;
  39 }
  40
  41 namespace web_cache {
  42 class WebCacheRenderProcessObserver;
  43 }
  44
  45 // Receives page information that was captured by PageInfo instance.
  46 class PageInfoReceiver {
  47  public:
  48   enum CaptureType { PRELIMINARY_CAPTURE, FINAL_CAPTURE };
  49   virtual void PageCaptured(base::string16* content,
  50                             CaptureType capture_type) = 0;
  51 };
  52
  53 // Captures page information using the top (main) frame of a frame tree.
  54 // Currently, this page information is just the text content of the all frames,
  55 // collected and concatenated until a certain limit (kMaxIndexChars) is reached.
  56 class PageInfo {
  57  public:
  58   using CaptureType = PageInfoReceiver::CaptureType;
  59
  60   explicit PageInfo(PageInfoReceiver* context);
  61   ~PageInfo() {}
  62
  63   void CapturePageInfoLater(CaptureType capture_type,
  64                             content::RenderFrame* render_frame,
  65                             base::TimeDelta delay);
  66
  67  private:
  68   // Captures the thumbnail and text contents for indexing for the given load
  69   // ID.  Kicks off analysis of the captured text.
  70   void CapturePageInfo(content::RenderFrame* render_frame,
  71                        CaptureType capture_type);
  72
  73   // Retrieves the text from the given frame contents, the page text up to the
  74   // maximum amount kMaxIndexChars will be placed into the given buffer.
  75   void CaptureText(blink::WebLocalFrame* frame, base::string16* contents);
  76
  77   PageInfoReceiver* context_;
  78
  79   // Used to delay calling CapturePageInfo.
  80   base::Timer capture_timer_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(PageInfo);
  83 };
  84
  85 // This class holds the Chrome specific parts of RenderView, and has the same
  86 // lifetime.
  87 class ChromeRenderViewObserver : public content::RenderViewObserver,
  88                                  public PageInfoReceiver {
  89  public:
  90   // translate_helper can be NULL.
  91   ChromeRenderViewObserver(
  92       content::RenderView* render_view,
  93       web_cache::WebCacheRenderProcessObserver*
  94           web_cache_render_process_observer);
  95   ~ChromeRenderViewObserver() override;
  96
  97  private:
  98   // RenderViewObserver implementation.
  99   bool OnMessageReceived(const IPC::Message& message) override;
 100   void DidStartLoading() override;
 101   void DidStopLoading() override;
 102   void DidCommitProvisionalLoad(blink::WebLocalFrame* frame,
 103                                 bool is_new_navigation) override;
 104   void Navigate(const GURL& url) override;
 105
 106 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 107   void OnWebUIJavaScript(const base::string16& javascript);
 108 #endif
 109 #if defined(ENABLE_EXTENSIONS)
 110   void OnSetVisuallyDeemphasized(bool deemphasized);
 111 #endif
 112 #if defined(OS_ANDROID)
 113   void OnUpdateTopControlsState(content::TopControlsState constraints,
 114                                 content::TopControlsState current,
 115                                 bool animate);
 116 #endif
 117   void OnGetWebApplicationInfo();
 118   void OnSetClientSidePhishingDetection(bool enable_phishing_detection);
 119   void OnSetWindowFeatures(const blink::WebWindowFeatures& window_features);
 120
 121   // Determines if a host is in the strict security host set.
 122   bool IsStrictSecurityHost(const std::string& host);
 123
 124   // Checks if a page contains <meta http-equiv="refresh" ...> tag.
 125   bool HasRefreshMetaTag(blink::WebFrame* frame);
 126
 127   // PageInfoReceiver implementation.
 128   void PageCaptured(base::string16* content, CaptureType capture_type) override;
 129
 130   // Save the JavaScript to preload if a ViewMsg_WebUIJavaScript is received.
 131   std::vector<base::string16> webui_javascript_;
 132
 133   // Owned by ChromeContentRendererClient and outlive us.
 134   web_cache::WebCacheRenderProcessObserver* web_cache_render_process_observer_;
 135
 136   // Have the same lifetime as us.
 137   translate::TranslateHelper* translate_helper_;
 138   safe_browsing::PhishingClassifierDelegate* phishing_classifier_;
 139
 140   // true if webview is overlayed with grey color.
 141   bool webview_visually_deemphasized_;
 142
 143   PageInfo page_info_;
 144
 145   DISALLOW_COPY_AND_ASSIGN(ChromeRenderViewObserver);
 146 };
 147
 148 #endif  // CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_