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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_ADDRESS_DETECTOR_H_
#define CONTENT_RENDERER_ANDROID_ADDRESS_DETECTOR_H_
#pragma once
#include "build/build_config.h" // Needed for OS_ANDROID
#if defined(OS_ANDROID)
#include <vector>
#include "base/string_tokenizer.h"
#include "base/string_util.h"
#include "content/content_detector.h"
// Finds a geographical address (currently US only) in the given text string.
class AddressDetector : public ContentDetector {
public:
AddressDetector();
virtual ~AddressDetector();
private:
friend class AddressDetectorTest;
// Implementation of ContentDetector.
virtual bool FindContent(const string16::const_iterator& begin,
const string16::const_iterator& end,
size_t* start_pos,
size_t* end_pos) OVERRIDE;
virtual std::string GetContentText(const WebKit::WebRange& range) OVERRIDE;
virtual GURL GetIntentURL(const std::string& content_text) OVERRIDE;
virtual size_t GetMaximumContentLength() OVERRIDE;
// Internal structs and classes. Required to be visible by the unit tests.
struct Word {
string16::const_iterator begin;
string16::const_iterator end;
Word() {}
Word(const string16::const_iterator& begin_it,
const string16::const_iterator& end_it)
: begin(begin_it),
end(end_it) {
DCHECK(begin_it <= end_it);
}
};
class HouseNumberParser {
public:
HouseNumberParser() {}
bool Parse(const string16::const_iterator& begin,
const string16::const_iterator& end,
Word* word);
private:
static inline bool IsPreDelimiter(char16 character);
static inline bool IsPostDelimiter(char16 character);
inline void RestartOnNextDelimiter();
inline bool CheckFinished(Word* word) const;
inline void AcceptChars(size_t num_chars);
inline void SkipChars(size_t num_chars);
inline void ResetState();
// Iterators to the beginning, current position and ending of the string
// being currently parsed.
string16::const_iterator begin_;
string16::const_iterator it_;
string16::const_iterator end_;
// Number of digits found in the current result candidate.
size_t num_digits_;
// Number of characters previous to the current iterator that belong
// to the current result candidate.
size_t result_chars_;
DISALLOW_COPY_AND_ASSIGN(HouseNumberParser);
};
typedef std::vector<Word> WordList;
typedef StringTokenizerT<string16, string16::const_iterator>
String16Tokenizer;
static bool FindStateStartingInWord(WordList* words,
size_t state_first_word,
size_t* state_last_word,
String16Tokenizer* tokenizer,
size_t* state_index);
static bool IsValidLocationName(const Word& word);
static bool IsZipValid(const Word& word, size_t state_index);
static bool IsZipValidForState(const Word& word, size_t state_index);
DISALLOW_COPY_AND_ASSIGN(AddressDetector);
};
#endif // defined(OS_ANDROID)
#endif // CONTENT_RENDERER_ANDROID_ADDRESS_DETECTOR_H_
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