| // Copyright (c) 2012 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 CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_ |
| #define CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_ |
| |
| #include <stddef.h> |
| |
| #include "base/macros.h" |
| #include "third_party/WebKit/public/web/WebRange.h" |
| #include "url/gurl.h" |
| |
| namespace blink { |
| class WebHitTestResult; |
| } |
| |
| namespace content { |
| |
| // Base class for text-based content detectors. |
| class ContentDetector { |
| public: |
| // Holds the content detection results. |
| struct Result { |
| Result(); |
| Result(const blink::WebRange& content_boundaries, |
| const std::string& text, |
| const GURL& intent_url); |
| Result(const Result& other); |
| ~Result(); |
| |
| bool valid; |
| blink::WebRange content_boundaries; |
| std::string text; // Processed text of the content. |
| GURL intent_url; // URL of the intent that should process this content. |
| }; |
| |
| virtual ~ContentDetector() {} |
| |
| // Returns a WebKit range delimiting the contents found around the tapped |
| // position. If no content is found a null range will be returned. |
| Result FindTappedContent(const blink::WebHitTestResult& hit_test); |
| |
| protected: |
| ContentDetector() {} |
| |
| // Parses the input string defined by the begin/end iterators returning true |
| // if the desired content is found. The start and end positions relative to |
| // the input iterators are returned in start_pos and end_pos. |
| // The end position is assumed to be non-inclusive. |
| virtual bool FindContent(const base::string16::const_iterator& begin, |
| const base::string16::const_iterator& end, |
| size_t* start_pos, |
| size_t* end_pos, |
| std::string* content_text) = 0; |
| |
| // Returns the intent URL that should process the content, if any. |
| virtual GURL GetIntentURL(const std::string& content_text) = 0; |
| |
| // Returns the maximum length of text to be extracted around the tapped |
| // position in order to search for content. |
| virtual size_t GetMaximumContentLength() = 0; |
| |
| blink::WebRange FindContentRange(const blink::WebHitTestResult& hit_test, |
| std::string* content_text); |
| |
| DISALLOW_COPY_AND_ASSIGN(ContentDetector); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_ |