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// 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_
#pragma once
#include "base/string_util.h"
#include "googleurl/src/gurl.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebRange.h"
namespace WebKit {
class WebHitTestResult;
}
namespace content {
// Base class for text-based content detectors.
class ContentDetector {
public:
// Holds the content detection results.
struct Result {
bool valid; // Flag indicating if the result is valid.
WebKit::WebRange range; // Range describing the content boundaries.
std::string text; // Processed text of the content.
GURL intent_url; // URL of the intent that should process this content.
Result() : valid(false) {}
Result(const WebKit::WebRange& range,
const std::string& text,
const GURL& intent_url)
: valid(true),
range(range),
text(text),
intent_url(intent_url) {}
};
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 WebKit::WebHitTestResult& hit_test);
protected:
// 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 string16::const_iterator& begin,
const 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;
ContentDetector() {}
WebKit::WebRange FindContentRange(const WebKit::WebHitTestResult& hit_test,
std::string* content_text);
DISALLOW_COPY_AND_ASSIGN(ContentDetector);
};
} // namespace content
#endif // CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_
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