Merge TextCheckingHelper into SpellChecker Part 1

third_party/WebKit/Source/core/editing/spellcheck/TextCheckingHelper.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
 
 #include "core/editing/spellcheck/TextCheckingHelper.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Range.h"
 #include "core/editing/VisiblePosition.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/iterators/CharacterIterator.h"
 #include "core/editing/iterators/WordAwareIterator.h"
 #include "core/editing/markers/DocumentMarkerController.h"
+#include "core/editing/spellcheck/SpellChecker.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/page/SpellCheckerClient.h"
 #include "platform/text/TextBreakIterator.h"
 #include "platform/text/TextCheckerClient.h"
 
 namespace blink {
 
-static void findMisspellings(TextCheckerClient& client, const String& text, Vector<TextCheckingResult>& results)
+// TODO(xiaochengh): Move this function to SpellChecker.cpp
+void SpellChecker::findMisspellings(const String& text, Vector<TextCheckingResult>& results)
 {
     Vector<UChar> characters;
     text.appendTo(characters);
     unsigned length = text.length();
 
     TextBreakIterator* iterator = wordBreakIterator(characters.data(), length);
     if (!iterator)
         return;
 
     int wordStart = iterator->current();
     while (0 <= wordStart) {
         int wordEnd = iterator->next();
         if (wordEnd < 0)
             break;
         int wordLength = wordEnd - wordStart;
         int misspellingLocation = -1;
         int misspellingLength = 0;
-        client.checkSpellingOfString(String(characters.data() + wordStart, wordLength), &misspellingLocation, &misspellingLength);
+        textChecker().checkSpellingOfString(String(characters.data() + wordStart, wordLength), &misspellingLocation, &misspellingLength);
         if (0 < misspellingLength) {
             DCHECK_LE(0, misspellingLocation);
             DCHECK_LE(misspellingLocation, wordLength);
             DCHECK_LT(0, misspellingLength);
             DCHECK_LE(misspellingLocation + misspellingLength, wordLength);
             TextCheckingResult misspelling;
             misspelling.decoration = TextDecorationTypeSpelling;
             misspelling.location = wordStart + misspellingLocation;
             misspelling.length = misspellingLength;
             results.append(misspelling);
@@ skipping 141 matching lines @@
 }
 
 int TextCheckingParagraph::checkingLength() const
 {
     DCHECK(m_checkingRange.isNotNull());
     if (-1 == m_checkingLength)
         m_checkingLength = TextIterator::rangeLength(checkingRange().startPosition(), checkingRange().endPosition());
     return m_checkingLength;
 }
 
-TextCheckingHelper::TextCheckingHelper(SpellCheckerClient& client, const Position& start, const Position& end)
-    : m_client(&client)
-    , m_start(start)
-    , m_end(end)
-{
-}
-
-TextCheckingHelper::~TextCheckingHelper()
-{
-}
-
-String TextCheckingHelper::findFirstMisspellingOrBadGrammar(int& outFirstFoundOffset)
+// TODO(xiaochengh): Move this function to SpellChecker.cpp
+String SpellChecker::findFirstMisspellingOrBadGrammar(const Position& start, const Position& end, int& outFirstFoundOffset)
 {
     String firstFoundItem;
     String misspelledWord;
 
     // Initialize out parameter; it will be updated if we find something to return.
     outFirstFoundOffset = 0;
 
     // Expand the search range to encompass entire paragraphs, since text checking needs that much context.
     // Determine the character offset from the start of the paragraph to the start of the original search range,
     // since we will want to ignore results in this area.
-    Position paragraphStart = startOfParagraph(createVisiblePosition(m_start)).toParentAnchoredPosition();
-    Position paragraphEnd = m_end;
+    Position paragraphStart = startOfParagraph(createVisiblePosition(start)).toParentAnchoredPosition();
+    Position paragraphEnd = end;
     int totalRangeLength = TextIterator::rangeLength(paragraphStart, paragraphEnd);
-    paragraphEnd = endOfParagraph(createVisiblePosition(m_start)).toParentAnchoredPosition();
+    paragraphEnd = endOfParagraph(createVisiblePosition(start)).toParentAnchoredPosition();
 
-    int rangeStartOffset = TextIterator::rangeLength(paragraphStart, m_start);
+    int rangeStartOffset = TextIterator::rangeLength(paragraphStart, start);
     int totalLengthProcessed = 0;
 
     bool firstIteration = true;
     bool lastIteration = false;
     while (totalLengthProcessed < totalRangeLength) {
         // Iterate through the search range by paragraphs, checking each one for spelling.
         int currentLength = TextIterator::rangeLength(paragraphStart, paragraphEnd);
         int currentStartOffset = firstIteration ? rangeStartOffset : 0;
         int currentEndOffset = currentLength;
-        if (inSameParagraph(createVisiblePosition(paragraphStart), createVisiblePosition(m_end))) {
+        if (inSameParagraph(createVisiblePosition(paragraphStart), createVisiblePosition(end))) {
             // Determine the character offset from the end of the original search range to the end of the paragraph,
             // since we will want to ignore results in this area.
-            currentEndOffset = TextIterator::rangeLength(paragraphStart, m_end);
+            currentEndOffset = TextIterator::rangeLength(paragraphStart, end);
             lastIteration = true;
         }
         if (currentStartOffset < currentEndOffset) {
             String paragraphString = plainText(EphemeralRange(paragraphStart, paragraphEnd));
             if (paragraphString.length() > 0) {
                 int spellingLocation = 0;
 
                 Vector<TextCheckingResult> results;
-                findMisspellings(m_client->textChecker(), paragraphString, results);
+                findMisspellings(paragraphString, results);
 
                 for (unsigned i = 0; i < results.size(); i++) {
                     const TextCheckingResult* result = &results[i];
                     if (result->decoration == TextDecorationTypeSpelling && result->location >= currentStartOffset && result->location + result->length <= currentEndOffset) {
                         DCHECK_GT(result->length, 0);
                         DCHECK_GE(result->location, 0);
                         spellingLocation = result->location;
                         misspelledWord = paragraphString.substring(result->location, result->length);
                         DCHECK(misspelledWord.length());
                         break;
                     }
                 }
 
                 if (!misspelledWord.isEmpty()) {
                     int spellingOffset = spellingLocation - currentStartOffset;
                     if (!firstIteration)
-                        spellingOffset += TextIterator::rangeLength(m_start, paragraphStart);
+                        spellingOffset += TextIterator::rangeLength(start, paragraphStart);
                     outFirstFoundOffset = spellingOffset;
                     firstFoundItem = misspelledWord;
                     break;
                 }
             }
         }
         if (lastIteration || totalLengthProcessed + currentLength >= totalRangeLength)
             break;
         VisiblePosition newParagraphStart = startOfNextParagraph(createVisiblePosition(paragraphEnd));
         paragraphStart = newParagraphStart.toParentAnchoredPosition();
         paragraphEnd = endOfParagraph(newParagraphStart).toParentAnchoredPosition();
         firstIteration = false;
         totalLengthProcessed += currentLength;
     }
     return firstFoundItem;
 }
 
 } // namespace blink