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Diffstat (limited to 'chrome/browser/spellcheck_worditerator.h')
| -rw-r--r-- | chrome/browser/spellcheck_worditerator.h | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/chrome/browser/spellcheck_worditerator.h b/chrome/browser/spellcheck_worditerator.h deleted file mode 100644 index c0fb8e1..0000000 --- a/chrome/browser/spellcheck_worditerator.h +++ /dev/null @@ -1,183 +0,0 @@ -// Copyright (c) 2006-2008 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 CHROME_BROWSER_SPELLCHECK_WORDITERATOR_H_ -#define CHROME_BROWSER_SPELLCHECK_WORDITERATOR_H_ - -#include <map> -#include <string> - -#include "base/basictypes.h" -#include "base/string16.h" - -#include "unicode/uscript.h" - -// A class which handles character attributes dependent on a spellchecker and -// its dictionary. -// This class is used by the SpellcheckWordIterator class to determine whether -// or not a character is one used by the spellchecker and its dictinary. -class SpellcheckCharAttribute { - public: - SpellcheckCharAttribute(); - - ~SpellcheckCharAttribute(); - - // Sets the default language of the spell checker. This controls which - // characters are considered parts of words of the given language. - void SetDefaultLanguage(const std::string& language); - - // Returns whether or not the given character is a character used by the - // selected dictionary. - // Parameters - // * character [in] (UChar32) - // Represents a Unicode character to be checked. - // Return values - // * true - // The given character is a word character. - // * false - // The given character is not a word character. - bool IsWordChar(UChar32 character) const; - - // Returns whether or not the given character is a character used by - // contractions. - // Parameters - // * character [in] (UChar32) - // Represents a Unicode character to be checked. - // Return values - // * true - // The given character is a character used by contractions. - // * false - // The given character is not a character used by contractions. - bool IsContractionChar(UChar32 character) const; - - private: - // Initializes the mapping table. - void InitializeScriptTable(); - - // Retrieves the ICU script code. - UScriptCode GetScriptCode(UChar32 character) const; - - // Updates an entry in the mapping table. - void SetWordScript(const int script_code, bool in_use); - - // Returns whether or not the given script is used by the selected - // dictionary. - bool IsWordScript(const UScriptCode script_code) const; - - private: - // Represents a mapping table from a script code to a boolean value - // representing whether or not the script is used by the selected dictionary. - bool script_attributes_[USCRIPT_CODE_LIMIT]; - - // Represents a table of characters used by contractions. - std::map<UChar32, bool> middle_letters_; - - DISALLOW_COPY_AND_ASSIGN(SpellcheckCharAttribute); -}; - -// A class which implements methods for finding the location of word boundaries -// used by the Spellchecker class. -// This class is implemented on the following assumptions: -// * An input string is encoded in UTF-16 (i.e. it may contain surrogate -// pairs), and; -// * The length of a string is the number of UTF-16 characters in the string -// (i.e. the length of a non-BMP character becomes two). -class SpellcheckWordIterator { - public: - SpellcheckWordIterator(); - - ~SpellcheckWordIterator(); - - // Initializes a word-iterator object. - // Parameters - // * attribute [in] (const SpellcheckCharAttribute*) - // Represents a set of character attributes used for filtering out - // non-word characters. - // * word [in] (const char16*) - // Represents a string from which this object extracts words. - // (This string does not have to be NUL-terminated.) - // * length [in] (size_t) - // Represents the length of the given string, in UTF-16 characters. - // This value should not include terminating NUL characters. - // * allow_contraction [in] (bool) - // Represents a flag to control whether or not this object should split a - // possible contraction (e.g. "isn't", "in'n'out", etc.) - // Return values - // * true - // This word-iterator object is initialized successfully. - // * false - // An error occured while initializing this object. - void Initialize(const SpellcheckCharAttribute* attribute, - const char16* word, - size_t length, - bool allow_contraction); - - // Retrieves a word (or a contraction). - // Parameters - // * word_string [out] (string16*) - // Represents a word (or a contraction) to be checked its spelling. - // This |word_string| has been already normalized to its canonical form - // (i.e. decomposed ligatures, replaced full-width latin characters to - // its ASCII alternatives, etc.) so that a SpellChecker object can check - // its spelling without any additional operations. - // On the other hand, a substring of the input string - // string16 str(&word[word_start], word_length); - // represents the non-normalized version of this extracted word. - // * word_start [out] (int*) - // Represents the offset of this word from the beginning of the input - // string, in UTF-16 characters. - // * word_length [out] (int*) - // Represents the length of an extracted word before normalization, in - // UTF-16 characters. - // When the input string contains ligatures, this value may not be equal - // to the length of the |word_string|. - // Return values - // * true - // Found a word (or a contraction) to be checked its spelling. - // * false - // Not found any more words or contractions to be checked their spellings. - bool GetNextWord(string16* word_string, - int* word_start, - int* word_length); - - private: - // Retrieves a segment consisting of word characters (and contraction - // characters if the |allow_contraction| value is true). - void GetSegment(int* segment_start, - int* segment_end); - - // Discards non-word characters at the beginning and the end of the given - // segment. - void TrimSegment(int segment_start, - int segment_end, - int* word_start, - int* word_length) const; - - // Normalizes the given segment of the |word_| variable and write its - // canonical form to the |output_string|. - bool Normalize(int input_start, - int input_length, - string16* output_string) const; - - private: - // The pointer to the input string from which we are extracting words. - const char16* word_; - - // The length of the original string. - int length_; - - // The current position in the original string. - int position_; - - // The flag to control whether or not this object should extract possible - // contractions. - bool allow_contraction_; - - // The character attributes used for filtering out non-word characters. - const SpellcheckCharAttribute* attribute_; - - DISALLOW_COPY_AND_ASSIGN(SpellcheckWordIterator); -}; - -#endif // CHROME_BROWSER_SPELLCHECK_WORDITERATOR_H_ |