Add support for distilling current WebContents

components/dom_distiller/content/distiller_page_web_contents.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_DOM_DISTILLER_CONTENT_DISTILLER_PAGE_WEB_CONTENTS_H_
 #define COMPONENTS_DOM_DISTILLER_CONTENT_DISTILLER_PAGE_WEB_CONTENTS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "components/dom_distiller/core/distiller_page.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "url/gurl.h"
 
 namespace content {
 class RenderViewHost;
 }
 
 using content::RenderViewHost;
 
 namespace dom_distiller {
 
-class DistillerContext;
+class SourcePageHandleWebContents : public SourcePageHandle {
+ public:
+  explicit SourcePageHandleWebContents(
+      scoped_ptr<content::WebContents> web_contents);
+  virtual ~SourcePageHandleWebContents();
+
+  scoped_ptr<content::WebContents> GetWebContents();
+
+ private:
+  // The WebContents this class owns.
+  scoped_ptr<content::WebContents> web_contents_;
+};
 
 class DistillerPageWebContentsFactory : public DistillerPageFactory {
  public:
   explicit DistillerPageWebContentsFactory(
       content::BrowserContext* browser_context)
       : DistillerPageFactory(), browser_context_(browser_context) {}
   virtual ~DistillerPageWebContentsFactory() {}
 
   virtual scoped_ptr<DistillerPage> CreateDistillerPage() const OVERRIDE;
+  virtual scoped_ptr<DistillerPage> CreateDistillerPageWithHandle(
+      scoped_ptr<SourcePageHandle> handle) const OVERRIDE;
 
  private:
   content::BrowserContext* browser_context_;
 };
 
 class DistillerPageWebContents : public DistillerPage,
                                  public content::WebContentsObserver {
  public:
-  DistillerPageWebContents(content::BrowserContext* browser_context);
+  DistillerPageWebContents(
+      content::BrowserContext* browser_context,
+      scoped_ptr<SourcePageHandleWebContents> optional_web_contents_handle);
   virtual ~DistillerPageWebContents();
 
   // content::WebContentsObserver implementation.
   virtual void DocumentLoadedInFrame(int64 frame_id,
                                      RenderViewHost* render_view_host) OVERRIDE;
 
   virtual void DidFailLoad(int64 frame_id,
                            const GURL& validated_url,
                            bool is_main_frame,
                            int error_code,
                            const base::string16& error_description,
                            RenderViewHost* render_view_host) OVERRIDE;
 
  protected:
   virtual void DistillPageImpl(const GURL& url,
                                const std::string& script) OVERRIDE;
 
  private:
+  friend class TestDistillerPageWebContents;
+
   enum State {
     // The page distiller is idle.
     IDLE,
     // A page is currently loading.
     LOADING_PAGE,
     // There was an error processing the page.
     PAGELOAD_FAILED,
     // JavaScript is executing within the context of the page. When the
     // JavaScript completes, the state will be returned to |IDLE|.
     EXECUTING_JAVASCRIPT
   };
 
+  // Creates a new WebContents, adds |this| as an observer, and loads the
+  // |url|.
+  virtual void CreateNewWebContents(const GURL& url);
+
   // Injects and executes JavaScript in the context of a loaded page. This
   // must only be called after the page has successfully loaded.
   void ExecuteJavaScript();
 
   // Called when the distillation is done or if the page load failed.
   void OnWebContentsDistillationDone(const GURL& page_url,
                                      const base::Value* value);
 
   // The current state of the |DistillerPage|, initially |IDLE|.
   State state_;
 
   // The JavaScript to inject to extract content.
   std::string script_;
 
   scoped_ptr<content::WebContents> web_contents_;
   content::BrowserContext* browser_context_;
   DISALLOW_COPY_AND_ASSIGN(DistillerPageWebContents);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CONTENT_DISTILLER_PAGE_WEB_CONTENTS_H_