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      1 // Copyright (c) 2013 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 CONTENT_RENDERER_SAVABLE_RESOURCES_H_
      6 #define CONTENT_RENDERER_SAVABLE_RESOURCES_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "content/common/content_export.h"
     12 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
     13 #include "url/gurl.h"
     14 
     15 namespace blink {
     16 class WebElement;
     17 class WebString;
     18 class WebView;
     19 }
     20 
     21 // A collection of operations that access the underlying WebKit DOM directly.
     22 namespace content {
     23 
     24 // Structure for storage the result of getting all savable resource links
     25 // for current page. The consumer of the SavableResourcesResult is responsible
     26 // for keeping these pointers valid for the lifetime of the
     27 // SavableResourcesResult instance.
     28 struct SavableResourcesResult {
     29   // vector which contains all savable links of sub resource.
     30   std::vector<GURL>* resources_list;
     31   // vector which contains corresponding all referral links of sub resource,
     32   // it matched with links one by one.
     33   std::vector<GURL>* referrer_urls_list;
     34   // and the corresponding referrer policies.
     35   std::vector<blink::WebReferrerPolicy>* referrer_policies_list;
     36   // vector which contains all savable links of main frame and sub frames.
     37   std::vector<GURL>* frames_list;
     38 
     39   // Constructor.
     40   SavableResourcesResult(
     41       std::vector<GURL>* resources_list,
     42       std::vector<GURL>* referrer_urls_list,
     43       std::vector<blink::WebReferrerPolicy>* referrer_policies_list,
     44       std::vector<GURL>* frames_list)
     45       : resources_list(resources_list),
     46         referrer_urls_list(referrer_urls_list),
     47         referrer_policies_list(referrer_policies_list),
     48         frames_list(frames_list) { }
     49 
     50  private:
     51   DISALLOW_COPY_AND_ASSIGN(SavableResourcesResult);
     52 };
     53 
     54 // Get all savable resource links from current webview, include main frame
     55 // and sub-frame. After collecting all savable resource links, this function
     56 // will send those links to embedder. Return value indicates whether we get
     57 // all saved resource links successfully.
     58 CONTENT_EXPORT bool GetAllSavableResourceLinksForCurrentPage(
     59     blink::WebView* view,
     60     const GURL& page_url,
     61     SavableResourcesResult* savable_resources_result,
     62     const char** savable_schemes);
     63 
     64 // Returns the value in an elements resource url attribute. For IMG, SCRIPT or
     65 // INPUT TYPE=image, returns the value in "src". For LINK TYPE=text/css, returns
     66 // the value in "href". For BODY, TABLE, TR, TD, returns the value in
     67 // "background". For BLOCKQUOTE, Q, DEL, INS, returns the value in "cite"
     68 // attribute. Otherwise returns a null WebString.
     69 CONTENT_EXPORT blink::WebString GetSubResourceLinkFromElement(
     70     const blink::WebElement& element);
     71 
     72 }  // namespace content
     73 
     74 #endif  // CONTENT_RENDERER_SAVABLE_RESOURCES_H_
     75