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diff --git a/Source/WebCore/platform/text/TextCheckerClient.h b/Source/WebCore/platform/text/TextCheckerClient.h
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+/*
+ * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2010 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:
+ * 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
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 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 TextCheckerClient_h
+#define TextCheckerClient_h
+
+#include <wtf/Forward.h>
+#include <wtf/Vector.h>
+#include <wtf/text/WTFString.h>
+
+namespace WebCore {
+
+class SpellChecker;
+
+struct GrammarDetail {
+    int location;
+    int length;
+    Vector<String> guesses;
+    String userDescription;
+};
+
+enum TextCheckingType {
+    TextCheckingTypeSpelling    = 1 << 1,
+    TextCheckingTypeGrammar     = 1 << 2,
+    TextCheckingTypeLink        = 1 << 5,
+    TextCheckingTypeQuote       = 1 << 6,
+    TextCheckingTypeDash        = 1 << 7,
+    TextCheckingTypeReplacement = 1 << 8,
+    TextCheckingTypeCorrection  = 1 << 9
+};
+
+struct TextCheckingResult {
+    TextCheckingType type;
+    int location;
+    int length;
+    Vector<GrammarDetail> details;
+    String replacement;
+};
+
+class TextCheckerClient {
+public:
+    virtual ~TextCheckerClient() {}
+
+    virtual void ignoreWordInSpellDocument(const String&) = 0;
+    virtual void learnWord(const String&) = 0;
+    virtual void checkSpellingOfString(const UChar*, int length, int* misspellingLocation, int* misspellingLength) = 0;
+    virtual String getAutoCorrectSuggestionForMisspelledWord(const String& misspelledWord) = 0;
+    virtual void checkGrammarOfString(const UChar*, int length, Vector<GrammarDetail>&, int* badGrammarLocation, int* badGrammarLength) = 0;
+#if PLATFORM(MAC) && !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
+    virtual void checkTextOfParagraph(const UChar* text, int length, uint64_t checkingTypes, Vector<TextCheckingResult>& results) = 0;
+#endif
+
+    // For spellcheckers that support multiple languages, it's often important to be able to identify the language in order to
+    // provide more accurate correction suggestions. Caller can pass in more text in "context" to aid such spellcheckers on language
+    // identification. Noramlly it's the text surrounding the "word" for which we are getting correction suggestions.
+    virtual void getGuessesForWord(const String& word, const String& context, Vector<String>& guesses) = 0;
+    virtual void requestCheckingOfString(SpellChecker*, int, const String&) = 0;
+};
+
+}
+
+#endif // TextCheckerClient_h