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chore: move spellcheck out of chromium_src (#15407)

This commit is contained in:
Milan Burda 2018-10-26 19:34:57 +02:00 коммит произвёл Jeremy Apthorp
Родитель bea4de9262
Коммит f921df7ad1
6 изменённых файлов: 3 добавлений и 632 удалений
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1
BUILD.gn
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@ -213,6 +213,7 @@ static_library("electron_lib") {
"//components/net_log",
"//components/network_session_configurator/common",
"//components/prefs",
"//components/spellcheck/renderer",
"//components/viz/service",
"//content/public/app:both",
"//content/public/browser",

2
atom/renderer/api/atom_api_spell_check_client.cc
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@ -10,7 +10,7 @@
#include "atom/common/native_mate_converters/string16_converter.h"
#include "base/logging.h"
#include "base/threading/thread_task_runner_handle.h"
#include "chrome/renderer/spellchecker/spellcheck_worditerator.h"
#include "components/spellcheck/renderer/spellcheck_worditerator.h"
#include "native_mate/converter.h"
#include "native_mate/dictionary.h"
#include "native_mate/function_template.h"

2
atom/renderer/api/atom_api_spell_check_client.h
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@ -11,7 +11,7 @@
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "chrome/renderer/spellchecker/spellcheck_worditerator.h"
#include "components/spellcheck/renderer/spellcheck_worditerator.h"
#include "native_mate/scoped_persistent.h"
#include "third_party/blink/public/platform/web_spell_check_panel_host_client.h"
#include "third_party/blink/public/platform/web_vector.h"

429
chromium_src/chrome/renderer/spellchecker/spellcheck_worditerator.cc
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@ -1,429 +0,0 @@
// 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.
// Implements a custom word iterator used for our spellchecker.
#include "chrome/renderer/spellchecker/spellcheck_worditerator.h"
#include <map>
#include <memory>
#include <string>
#include <utility>
#include "base/i18n/break_iterator.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "third_party/icu/source/common/unicode/normlzr.h"
#include "third_party/icu/source/common/unicode/schriter.h"
#include "third_party/icu/source/common/unicode/uscript.h"
#include "third_party/icu/source/i18n/unicode/ulocdata.h"
// SpellcheckCharAttribute implementation:
SpellcheckCharAttribute::SpellcheckCharAttribute()
: script_code_(USCRIPT_LATIN) {}
SpellcheckCharAttribute::~SpellcheckCharAttribute() {}
void SpellcheckCharAttribute::SetDefaultLanguage(const std::string& language) {
CreateRuleSets(language);
}
base::string16 SpellcheckCharAttribute::GetRuleSet(
bool allow_contraction) const {
return allow_contraction ? ruleset_allow_contraction_
: ruleset_disallow_contraction_;
}
void SpellcheckCharAttribute::CreateRuleSets(const std::string& language) {
// The template for our custom rule sets, which is based on the word-break
// rules of ICU 4.0:
// <http://source.icu-project.org/repos/icu/icu/tags/release-4-0/source/data/brkitr/word.txt>.
// The major differences from the original one are listed below:
// * It discards comments in the original rules.
// * It discards characters not needed by our spellchecker (e.g. numbers,
// punctuation characters, Hiraganas, Katakanas, CJK Ideographs, and so on).
// * It allows customization of the $ALetter value (i.e. word characters).
// * It allows customization of the $ALetterPlus value (i.e. whether or not to
// use the dictionary data).
// * It allows choosing whether or not to split a text at contraction
// characters.
// This template only changes the forward-iteration rules. So, calling
// ubrk_prev() returns the same results as the original template.
static const char kRuleTemplate[] =
"!!chain;"
"$CR = [\\p{Word_Break = CR}];"
"$LF = [\\p{Word_Break = LF}];"
"$Newline = [\\p{Word_Break = Newline}];"
"$Extend = [\\p{Word_Break = Extend}];"
"$Format = [\\p{Word_Break = Format}];"
"$Katakana = [\\p{Word_Break = Katakana}];"
// Not all the characters in a given script are ALetter.
// For instance, U+05F4 is MidLetter. So, this may be
// better, but it leads to an empty set error in Thai.
// "$ALetter = [[\\p{script=%s}] & [\\p{Word_Break = ALetter}]];"
"$ALetter = [\\p{script=%s}%s];"
// U+0027 (single quote/apostrophe) is not in MidNumLet any more
// in UAX 29 rev 21 or later. For our purpose, U+0027
// has to be treated as MidNumLet. ( http://crbug.com/364072 )
"$MidNumLet = [\\p{Word_Break = MidNumLet} \\u0027];"
"$MidLetter = [\\p{Word_Break = MidLetter}%s];"
"$MidNum = [\\p{Word_Break = MidNum}];"
"$Numeric = [\\p{Word_Break = Numeric}];"
"$ExtendNumLet = [\\p{Word_Break = ExtendNumLet}];"
"$Control = [\\p{Grapheme_Cluster_Break = Control}]; "
"%s" // ALetterPlus
"$KatakanaEx = $Katakana ($Extend | $Format)*;"
"$ALetterEx = $ALetterPlus ($Extend | $Format)*;"
"$MidNumLetEx = $MidNumLet ($Extend | $Format)*;"
"$MidLetterEx = $MidLetter ($Extend | $Format)*;"
"$MidNumEx = $MidNum ($Extend | $Format)*;"
"$NumericEx = $Numeric ($Extend | $Format)*;"
"$ExtendNumLetEx = $ExtendNumLet ($Extend | $Format)*;"
"$Hiragana = [\\p{script=Hiragana}];"
"$Ideographic = [\\p{Ideographic}];"
"$HiraganaEx = $Hiragana ($Extend | $Format)*;"
"$IdeographicEx = $Ideographic ($Extend | $Format)*;"
"!!forward;"
"$CR $LF;"
"[^$CR $LF $Newline]? ($Extend | $Format)+;"
"$ALetterEx {200};"
"$ALetterEx $ALetterEx {200};"
"%s" // (Allow|Disallow) Contraction
"!!reverse;"
"$BackALetterEx = ($Format | $Extend)* $ALetterPlus;"
"$BackMidNumLetEx = ($Format | $Extend)* $MidNumLet;"
"$BackNumericEx = ($Format | $Extend)* $Numeric;"
"$BackMidNumEx = ($Format | $Extend)* $MidNum;"
"$BackMidLetterEx = ($Format | $Extend)* $MidLetter;"
"$BackKatakanaEx = ($Format | $Extend)* $Katakana;"
"$BackExtendNumLetEx= ($Format | $Extend)* $ExtendNumLet;"
"$LF $CR;"
"($Format | $Extend)* [^$CR $LF $Newline]?;"
"$BackALetterEx $BackALetterEx;"
"$BackALetterEx ($BackMidLetterEx | $BackMidNumLetEx) $BackALetterEx;"
"$BackNumericEx $BackNumericEx;"
"$BackNumericEx $BackALetterEx;"
"$BackALetterEx $BackNumericEx;"
"$BackNumericEx ($BackMidNumEx | $BackMidNumLetEx) $BackNumericEx;"
"$BackKatakanaEx $BackKatakanaEx;"
"$BackExtendNumLetEx ($BackALetterEx | $BackNumericEx |"
" $BackKatakanaEx | $BackExtendNumLetEx);"
"($BackALetterEx | $BackNumericEx | $BackKatakanaEx)"
" $BackExtendNumLetEx;"
"!!safe_reverse;"
"($Extend | $Format)+ .?;"
"($MidLetter | $MidNumLet) $BackALetterEx;"
"($MidNum | $MidNumLet) $BackNumericEx;"
"!!safe_forward;"
"($Extend | $Format)+ .?;"
"($MidLetterEx | $MidNumLetEx) $ALetterEx;"
"($MidNumEx | $MidNumLetEx) $NumericEx;";
// Retrieve the script codes used by the given language from ICU. When the
// given language consists of two or more scripts, we just use the first
// script. The size of returned script codes is always < 8. Therefore, we use
// an array of size 8 so we can include all script codes without insufficient
// buffer errors.
UErrorCode error = U_ZERO_ERROR;
UScriptCode script_code[8];
int scripts = uscript_getCode(language.c_str(), script_code,
arraysize(script_code), &error);
if (U_SUCCESS(error) && scripts >= 1)
script_code_ = script_code[0];
// Retrieve the values for $ALetter and $ALetterPlus. We use the dictionary
// only for the languages which need it (i.e. Korean and Thai) to prevent ICU
// from returning dictionary words (i.e. Korean or Thai words) for languages
// which don't need them.
const char* aletter = uscript_getName(script_code_);
if (!aletter)
aletter = "Latin";
const char kWithDictionary[] =
"$dictionary = [:LineBreak = Complex_Context:];"
"$ALetterPlus = [$ALetter [$dictionary-$Extend-$Control]];";
const char kWithoutDictionary[] = "$ALetterPlus = $ALetter;";
const char* aletter_plus = kWithoutDictionary;
if (script_code_ == USCRIPT_HANGUL || script_code_ == USCRIPT_THAI ||
script_code_ == USCRIPT_LAO || script_code_ == USCRIPT_KHMER)
aletter_plus = kWithDictionary;
// Treat numbers as word characters except for Arabic and Hebrew.
const char* aletter_extra = " [0123456789]";
if (script_code_ == USCRIPT_HEBREW)
aletter_extra = "";
else if (script_code_ == USCRIPT_ARABIC)
// When "script=Arabic", it does not include tatweel, which is
// "script=Common" so add it back. Otherwise, it creates unwanted
// word breaks.
aletter_extra = " [\\u0640]";
const char kMidLetterExtra[] = "";
// For Hebrew, treat single/double quoation marks as MidLetter.
const char kMidLetterExtraHebrew[] = "\"'";
const char* midletter_extra = kMidLetterExtra;
if (script_code_ == USCRIPT_HEBREW)
midletter_extra = kMidLetterExtraHebrew;
// Create two custom rule-sets: one allows contraction and the other does not.
// We save these strings in UTF-16 so we can use it without conversions. (ICU
// needs UTF-16 strings.)
const char kAllowContraction[] =
"$ALetterEx ($MidLetterEx | $MidNumLetEx) $ALetterEx {200};";
const char kDisallowContraction[] = "";
ruleset_allow_contraction_ = base::ASCIIToUTF16(
base::StringPrintf(kRuleTemplate, aletter, aletter_extra, midletter_extra,
aletter_plus, kAllowContraction));
ruleset_disallow_contraction_ = base::ASCIIToUTF16(
base::StringPrintf(kRuleTemplate, aletter, aletter_extra, midletter_extra,
aletter_plus, kDisallowContraction));
}
bool SpellcheckCharAttribute::OutputChar(UChar c,
base::string16* output) const {
// Call the language-specific function if necessary.
// Otherwise, we call the default one.
switch (script_code_) {
case USCRIPT_ARABIC:
return OutputArabic(c, output);
case USCRIPT_HANGUL:
return OutputHangul(c, output);
case USCRIPT_HEBREW:
return OutputHebrew(c, output);
default:
return OutputDefault(c, output);
}
}
bool SpellcheckCharAttribute::OutputArabic(UChar c,
base::string16* output) const {
// Include non-Arabic characters (which should trigger a spelling error)
// and Arabic characters excluding vowel marks and class "Lm".
// We filter the latter because, while they are "letters", they are
// optional and so don't affect the correctness of the rest of the word.
if (!(0x0600 <= c && c <= 0x06FF) || (u_isalpha(c) && c != 0x0640))
output->push_back(c);
return true;
}
bool SpellcheckCharAttribute::OutputHangul(UChar c,
base::string16* output) const {
// Decompose a Hangul character to a Hangul vowel and consonants used by our
// spellchecker. A Hangul character of Unicode is a ligature consisting of a
// Hangul vowel and consonants, e.g. U+AC01 "Gag" consists of U+1100 "G",
// U+1161 "a", and U+11A8 "g". That is, we can treat each Hangul character as
// a point of a cubic linear space consisting of (first consonant, vowel, last
// consonant). Therefore, we can compose a Hangul character from a vowel and
// two consonants with linear composition:
// character = 0xAC00 +
// (first consonant - 0x1100) * 28 * 21 +
// (vowel - 0x1161) * 28 +
// (last consonant - 0x11A7);
// We can also decompose a Hangul character with linear decomposition:
// first consonant = (character - 0xAC00) / 28 / 21;
// vowel = (character - 0xAC00) / 28 % 21;
// last consonant = (character - 0xAC00) % 28;
// This code is copied from Unicode Standard Annex #15
// <http://unicode.org/reports/tr15> and added some comments.
const int kSBase = 0xAC00; // U+AC00: the top of Hangul characters.
const int kLBase = 0x1100; // U+1100: the top of Hangul first consonants.
const int kVBase = 0x1161; // U+1161: the top of Hangul vowels.
const int kTBase = 0x11A7; // U+11A7: the top of Hangul last consonants.
const int kLCount = 19; // The number of Hangul first consonants.
const int kVCount = 21; // The number of Hangul vowels.
const int kTCount = 28; // The number of Hangul last consonants.
const int kNCount = kVCount * kTCount;
const int kSCount = kLCount * kNCount;
int index = c - kSBase;
if (index < 0 || index >= kSBase + kSCount) {
// This is not a Hangul syllable. Call the default output function since we
// should output this character when it is a Hangul syllable.
return OutputDefault(c, output);
}
// This is a Hangul character. Decompose this characters into Hangul vowels
// and consonants.
int l = kLBase + index / kNCount;
int v = kVBase + (index % kNCount) / kTCount;
int t = kTBase + index % kTCount;
output->push_back(l);
output->push_back(v);
if (t != kTBase)
output->push_back(t);
return true;
}
bool SpellcheckCharAttribute::OutputHebrew(UChar c,
base::string16* output) const {
// Discard characters except Hebrew alphabets. We also discard Hebrew niqquds
// to prevent our Hebrew dictionary from marking a Hebrew word including
// niqquds as misspelled. (Same as Arabic vowel marks, we need to check
// niqquds manually and filter them out since their script codes are
// USCRIPT_HEBREW.)
// Pass through ASCII single/double quotation marks and Hebrew Geresh and
// Gershayim.
if ((0x05D0 <= c && c <= 0x05EA) || c == 0x22 || c == 0x27 || c == 0x05F4 ||
c == 0x05F3)
output->push_back(c);
return true;
}
bool SpellcheckCharAttribute::OutputDefault(UChar c,
base::string16* output) const {
// Check the script code of this character and output only if it is the one
// used by the spellchecker language.
UErrorCode status = U_ZERO_ERROR;
UScriptCode script_code = uscript_getScript(c, &status);
if (script_code == script_code_ || script_code == USCRIPT_COMMON)
output->push_back(c);
return true;
}
// SpellcheckWordIterator implementation:
SpellcheckWordIterator::SpellcheckWordIterator()
: text_(nullptr), attribute_(nullptr), iterator_() {}
SpellcheckWordIterator::~SpellcheckWordIterator() {
Reset();
}
bool SpellcheckWordIterator::Initialize(
const SpellcheckCharAttribute* attribute,
bool allow_contraction) {
// Create a custom ICU break iterator with empty text used in this object. (We
// allow setting text later so we can re-use this iterator.)
DCHECK(attribute);
const base::string16 rule(attribute->GetRuleSet(allow_contraction));
// If there is no rule set, the attributes were invalid.
if (rule.empty())
return false;
std::unique_ptr<base::i18n::BreakIterator> iterator(
new base::i18n::BreakIterator(base::string16(), rule));
if (!iterator->Init()) {
// Since we're not passing in any text, the only reason this could fail
// is if we fail to parse the rules. Since the rules are hardcoded,
// that would be a bug in this class.
NOTREACHED() << "failed to open iterator (broken rules)";
return false;
}
iterator_ = std::move(iterator);
// Set the character attributes so we can normalize the words extracted by
// this iterator.
attribute_ = attribute;
return true;
}
bool SpellcheckWordIterator::IsInitialized() const {
// Return true iff we have an iterator.
return !!iterator_;
}
bool SpellcheckWordIterator::SetText(const base::char16* text, size_t length) {
DCHECK(!!iterator_);
// Set the text to be split by this iterator.
if (!iterator_->SetText(text, length)) {
LOG(ERROR) << "failed to set text";
return false;
}
text_ = text;
return true;
}
SpellcheckWordIterator::WordIteratorStatus SpellcheckWordIterator::GetNextWord(
base::string16* word_string,
int* word_start,
int* word_length) {
DCHECK(!!text_);
word_string->clear();
*word_start = 0;
*word_length = 0;
if (!text_) {
return IS_END_OF_TEXT;
}
// Find a word that can be checked for spelling or a character that can be
// skipped over. Rather than moving past a skippable character this returns
// IS_SKIPPABLE and defers handling the character to the calling function.
while (iterator_->Advance()) {
const size_t start = iterator_->prev();
const size_t length = iterator_->pos() - start;
switch (iterator_->GetWordBreakStatus()) {
case base::i18n::BreakIterator::IS_WORD_BREAK: {
if (Normalize(start, length, word_string)) {
*word_start = start;
*word_length = length;
return IS_WORD;
}
break;
}
case base::i18n::BreakIterator::IS_SKIPPABLE_WORD: {
*word_string = iterator_->GetString();
*word_start = start;
*word_length = length;
return IS_SKIPPABLE;
}
// |iterator_| is RULE_BASED so the break status should never be
// IS_LINE_OR_CHAR_BREAK.
case base::i18n::BreakIterator::IS_LINE_OR_CHAR_BREAK: {
NOTREACHED();
break;
}
}
}
// There aren't any more words in the given text.
return IS_END_OF_TEXT;
}
void SpellcheckWordIterator::Reset() {
iterator_.reset();
}
bool SpellcheckWordIterator::Normalize(int input_start,
int input_length,
base::string16* output_string) const {
// We use NFKC (Normalization Form, Compatible decomposition, followed by
// canonical Composition) defined in Unicode Standard Annex #15 to normalize
// this token because it it the most suitable normalization algorithm for our
// spellchecker. Nevertheless, it is not a perfect algorithm for our
// spellchecker and we need manual normalization as well. The normalized
// text does not have to be NUL-terminated since its characters are copied to
// string16, which adds a NUL character when we need.
icu::UnicodeString input(FALSE, &text_[input_start], input_length);
UErrorCode status = U_ZERO_ERROR;
icu::UnicodeString output;
icu::Normalizer::normalize(input, UNORM_NFKC, 0, output, status);
if (status != U_ZERO_ERROR && status != U_STRING_NOT_TERMINATED_WARNING)
return false;
// Copy the normalized text to the output.
icu::StringCharacterIterator it(output);
for (UChar c = it.first(); c != icu::CharacterIterator::DONE; c = it.next())
attribute_->OutputChar(c, output_string);
return !output_string->empty();
}

199
chromium_src/chrome/renderer/spellchecker/spellcheck_worditerator.h
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@ -1,199 +0,0 @@
// Copyright (c) 2011 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.
// Defines an iterator class that enumerates words supported by our spellchecker
// from multi-language text. This class is used for filtering out characters
// not supported by our spellchecker.
#ifndef CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_WORDITERATOR_H_
#define CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_WORDITERATOR_H_
#include <stddef.h>
#include <memory>
#include <string>
#include "base/macros.h"
#include "base/strings/string16.h"
#include "third_party/icu/source/common/unicode/uscript.h"
namespace base {
namespace i18n {
class BreakIterator;
} // namespace i18n
} // namespace base
// A class which encapsulates language-specific operations used by
// SpellcheckWordIterator. When we set the spellchecker language, this class
// creates rule sets that filter out the characters not supported by the
// spellchecker. (Please read the comment in the SpellcheckWordIterator class
// about how to use this class.)
class SpellcheckCharAttribute {
public:
SpellcheckCharAttribute();
~SpellcheckCharAttribute();
// Sets the language of the spellchecker. When this function is called with an
// ISO language code, this function creates the custom rule-sets used by
// the ICU break iterator so it can extract only words used by the language.
// GetRuleSet() returns the rule-sets created in this function.
void SetDefaultLanguage(const std::string& language);
// Returns a custom rule-set string used by the ICU break iterator. This class
// has two rule-sets, one splits a contraction and the other does not, so we
// can split a concaticated word (e.g. "seven-year-old") into words (e.g.
// "seven", "year", and "old") and check their spellings. The result stirng is
// encoded in UTF-16 since ICU needs UTF-16 strings.
base::string16 GetRuleSet(bool allow_contraction) const;
// Outputs a character only if it is a word character. (Please read the
// comments in CreateRuleSets() why we need this function.)
bool OutputChar(UChar c, base::string16* output) const;
private:
// Creates the rule-sets that return words possibly used by the given
// language. Unfortunately, these rule-sets are not perfect and have some
// false-positives. For example, they return combined accent marks even though
// we need English words only. We call OutputCharacter() to filter out such
// false-positive characters.
void CreateRuleSets(const std::string& language);
// Outputs a character only if it is one used by the given language. These
// functions are called from OutputChar().
bool OutputArabic(UChar c, base::string16* output) const;
bool OutputHangul(UChar c, base::string16* output) const;
bool OutputHebrew(UChar c, base::string16* output) const;
bool OutputDefault(UChar c, base::string16* output) const;
// The custom rule-set strings used by ICU break iterator. Since it is not so
// easy to create custom rule-sets from an ISO language code, this class
// saves these rule-set strings created when we set the language.
base::string16 ruleset_allow_contraction_;
base::string16 ruleset_disallow_contraction_;
// The script code used by this language.
UScriptCode script_code_;
DISALLOW_COPY_AND_ASSIGN(SpellcheckCharAttribute);
};
// A class which extracts words that can be checked for spelling from a
// multi-language string. The ICU word-break iterator does not discard some
// punctuation characters attached to a word. For example, when we set a word
// "_hello_" to a word-break iterator, it just returns "_hello_". Neither does
// it discard characters not used by the language. For example, it returns
// Russian words even though we need English words only. To extract only the
// words that our spellchecker can check their spellings, this class uses custom
// rule-sets created by the SpellcheckCharAttribute class. Also, this class
// normalizes extracted words so our spellchecker can check the spellings of
// words that include ligatures, combined characters, full-width characters,
// etc. This class uses UTF-16 strings as its input and output strings since
// UTF-16 is the native encoding of ICU and avoid unnecessary conversions
// when changing the encoding of this string for our spellchecker. (Chrome can
// use two or more spellcheckers and we cannot assume their encodings.)
// The following snippet is an example that extracts words with this class.
//
// // Creates the language-specific attributes for US English.
// SpellcheckCharAttribute attribute;
// attribute.SetDefaultLanguage("en-US");
//
// // Set up a SpellcheckWordIterator object which extracts English words,
// // and retrieve them.
// SpellcheckWordIterator iterator;
// base::string16 text(base::UTF8ToUTF16("this is a test."));
// iterator.Initialize(&attribute, true);
// iterator.SetText(text.c_str(), text_.length());
//
// base::string16 word;
// int offset;
// int length;
// while (iterator.GetNextWord(&word, &offset, &length)) {
// ...
// }
//
class SpellcheckWordIterator {
public:
enum WordIteratorStatus {
// The end of a sequence of text that the iterator recognizes as characters
// that can form a word.
IS_WORD,
// Non-word characters that the iterator can skip past, such as punctuation,
// whitespace, and characters from another character set.
IS_SKIPPABLE,
// The end of the text that the iterator is going over.
IS_END_OF_TEXT
};
SpellcheckWordIterator();
~SpellcheckWordIterator();
// Initializes a word-iterator object with the language-specific attribute. If
// we need to split contractions and concatenated words, call this function
// with its 'allow_contraction' parameter false. (This function uses lots of
// temporal memory to compile a custom word-break rule into an automaton.)
bool Initialize(const SpellcheckCharAttribute* attribute,
bool allow_contraction);
// Returns whether this word iterator is initialized.
bool IsInitialized() const;
// Set text to be iterated. (This text does not have to be NULL-terminated.)
// This function also resets internal state so we can reuse this iterator
// without calling Initialize().
bool SetText(const base::char16* text, size_t length);
// Advances |iterator_| through |text_| and gets the current status of the
// word iterator within |text|:
//
// - Returns IS_WORD if the iterator just found the end of a sequence of word
// characters and it was able to normalize the sequence. This stores the
// normalized string into |word_string| and stores the position and length
// into |word_start| and |word_length| respectively. Keep in mind that
// since this function normalizes the output word, the length of
// |word_string| may be different from the |word_length|. Therefore, when
// we call functions that change the input text, such as
// string16::replace(), we need to use |word_start| and |word_length| as
// listed in the following snippet:
//
// while(iterator.GetNextWord(&word, &offset, &length))
// text.replace(offset, length, word);
//
// - Returns IS_SKIPPABLE if the iterator just found a character that the
// iterator can skip past such as punctuation, whitespace, and characters
// from another character set. This stores the character, position, and
// length into |word_string|, |word_start|, and |word_length| respectively.
//
// - Returns IS_END_OF_TEXT if the iterator has reached the end of |text_|.
SpellcheckWordIterator::WordIteratorStatus
GetNextWord(base::string16* word_string, int* word_start, int* word_length);
// Releases all the resources attached to this object.
void Reset();
private:
// Normalizes a non-terminated string returned from an ICU word-break
// iterator. A word returned from an ICU break iterator may include characters
// not supported by our spellchecker, e.g. ligatures, combining/ characters,
// full-width letters, etc. This function replaces such characters with
// alternative characters supported by our spellchecker. This function also
// calls SpellcheckWordIterator::OutputChar() to filter out false-positive
// characters.
bool Normalize(int input_start,
int input_length,
base::string16* output_string) const;
// The pointer to the input string from which we are extracting words.
const base::char16* text_;
// The language-specific attributes used for filtering out non-word
// characters.
const SpellcheckCharAttribute* attribute_;
// The break iterator.
std::unique_ptr<base::i18n::BreakIterator> iterator_;
DISALLOW_COPY_AND_ASSIGN(SpellcheckWordIterator);
};
#endif // CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_WORDITERATOR_H_

2
filenames.gni
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@ -664,8 +664,6 @@ filenames = {
"chromium_src/chrome/browser/process_singleton.h",
"chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc",
"chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.h",
"chromium_src/chrome/renderer/spellchecker/spellcheck_worditerator.cc",
"chromium_src/chrome/renderer/spellchecker/spellcheck_worditerator.h",
]
lib_sources_nss = [