Chunk up the text to spell check also when the text is pasted.

Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 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 409 matching lines @@
     ReplaceSelectionCommand::create(*m_frame->document(), fragment, options, EditActionPaste)->apply();
     revealSelectionAfterEditingOperation();
 
     if (m_frame->selection().isInPasswordField() || !isContinuousSpellCheckingEnabled())
         return;
     Node* nodeToCheck = m_frame->selection().rootEditableElement();
     if (!nodeToCheck)
         return;
 
     RefPtr<Range> rangeToCheck = Range::create(*m_frame->document(), firstPositionInNode(nodeToCheck), lastPositionInNode(nodeToCheck));
-    m_spellCheckRequester->requestCheckingFor(SpellCheckRequest::create(resolveTextCheckingTypeMask(TextCheckingTypeSpelling | TextCheckingTypeGrammar), TextCheckingProcessBatch, rangeToCheck, rangeToCheck));
+    TextCheckingParagraph textToCheck(rangeToCheck, rangeToCheck);
+    bool asynchronous = true;
+    chunkAndMarkAllMisspellingsAndBadGrammar(resolveTextCheckingTypeMask(TextCheckingTypeSpelling | TextCheckingTypeGrammar), textToCheck, asynchronous);
 }
 
 void Editor::replaceSelectionWithText(const String& text, bool selectReplacement, bool smartReplace)
 {
     replaceSelectionWithFragment(createFragmentFromText(selectedRange().get(), text), selectReplacement, smartReplace, true);
 }
 
 PassRefPtr<Range> Editor::selectedRange()
 {
     if (!m_frame)
@@ skipping 1087 matching lines @@
     // If we're not in an editable node, bail.
     Node* editableNode = spellingRange->startContainer();
     if (!editableNode || !editableNode->rendererIsEditable())
         return;
 
     if (!isSpellCheckingEnabledFor(editableNode))
         return;
 
     Range* rangeToCheck = shouldMarkGrammar ? grammarRange : spellingRange;
     TextCheckingParagraph fullParagraphToCheck(rangeToCheck);
+
+    bool asynchronous = m_frame && m_frame->settings() && m_frame->settings()->asynchronousSpellCheckingEnabled();
+    chunkAndMarkAllMisspellingsAndBadGrammar(textCheckingOptions, fullParagraphToCheck, asynchronous);
+}
+
+void Editor::chunkAndMarkAllMisspellingsAndBadGrammar(TextCheckingTypeMask textCheckingOptions, const TextCheckingParagraph& fullParagraphToCheck, bool asynchronous)
+{
     if (fullParagraphToCheck.isRangeEmpty() || fullParagraphToCheck.isEmpty())
         return;
 
     // Since the text may be quite big chunk it up and adjust to the sentence boundary.
     const int kChunkSize = 16 * 1024;
     int start = fullParagraphToCheck.checkingStart();
     int end = fullParagraphToCheck.checkingEnd();
     start = std::min(start, end);
     end = std::max(start, end);
-    bool asynchronous = m_frame && m_frame->settings() && m_frame->settings()->asynchronousSpellCheckingEnabled();
     const int kNumChunksToCheck = asynchronous ? (end - start + kChunkSize - 1) / (kChunkSize) : 1;
     int currentChunkStart = start;
-    RefPtr<Range> checkRange = asynchronous ? fullParagraphToCheck.paragraphRange() : rangeToCheck;
-    RefPtr<Range> paragraphRange = fullParagraphToCheck.paragraphRange();
+    RefPtr<Range> checkRange = fullParagraphToCheck.checkingRange();
     if (kNumChunksToCheck == 1 && asynchronous) {
-        markAllMisspellingsAndBadGrammarInRanges(textCheckingOptions, checkRange.get(), paragraphRange.get(), asynchronous, 0);
+        markAllMisspellingsAndBadGrammarInRanges(textCheckingOptions, checkRange.get(), checkRange.get(), asynchronous, 0);
         return;
     }
 
     for (int iter = 0; iter < kNumChunksToCheck; ++iter) {
         checkRange = fullParagraphToCheck.subrange(currentChunkStart, kChunkSize);
         setStart(checkRange.get(), startOfSentence(checkRange->startPosition()));
         setEnd(checkRange.get(), endOfSentence(checkRange->endPosition()));
-        paragraphRange = checkRange;
 
         int checkingLength = 0;
-        markAllMisspellingsAndBadGrammarInRanges(textCheckingOptions, checkRange.get(), paragraphRange.get(), asynchronous, iter, &checkingLength);
+        markAllMisspellingsAndBadGrammarInRanges(textCheckingOptions, checkRange.get(), checkRange.get(), asynchronous, iter, &checkingLength);
         currentChunkStart += checkingLength;
     }
 }
 
 void Editor::markAllMisspellingsAndBadGrammarInRanges(TextCheckingTypeMask textCheckingOptions, Range* checkRange, Range* paragraphRange, bool asynchronous, int requestNumber, int* checkingLength)
 {
     TextCheckingParagraph sentenceToCheck(checkRange, paragraphRange);
     if (checkingLength)
         *checkingLength = sentenceToCheck.checkingLength();
 
@@ skipping 632 matching lines @@
     return WebCore::unifiedTextCheckerEnabled(m_frame);
 }
 
 void Editor::toggleOverwriteModeEnabled()
 {
     m_overwriteModeEnabled = !m_overwriteModeEnabled;
     frame().selection().setShouldShowBlockCursor(m_overwriteModeEnabled);
 };
 
 } // namespace WebCore