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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_
#define CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_
#pragma once
#include "build/build_config.h" // Needed for OS_ANDROID
#if defined(OS_ANDROID)
#include "base/string_util.h"
#include "googleurl/src/gurl.h"
#include "public/WebRange.h"
namespace WebKit {
class WebHitTestInfo;
}
namespace WebCore {
class Settings;
}
// 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::WebHitTestInfo& 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) = 0;
virtual bool IsEnabled(const WebKit::WebHitTestInfo& hit_test) = 0;
WebCore::Settings* GetSettings(const WebKit::WebHitTestInfo& hit_test);
// Extracts and processes the text of the detected content.
virtual std::string GetContentText(const WebKit::WebRange& range) = 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::WebHitTestInfo& hit_test);
DISALLOW_COPY_AND_ASSIGN(ContentDetector);
};
#endif // defined(OS_ANDROID)
#endif // CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_
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