/*
 * 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * 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
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 */

#ifndef WebSpellCheckClient_h
#define WebSpellCheckClient_h

#include "../platform/WebString.h"
#include "../platform/WebVector.h"

namespace blink {

class WebString;
class WebTextCheckingCompletion;
struct WebTextCheckingResult;

class WebSpellCheckClient {
 public:
  // The client should perform spell-checking on the given text. If the
  // text contains a misspelled word, then upon return misspelledOffset
  // will point to the start of the misspelled word, and misspelledLength
  // will indicates its length. Otherwise, if there was not a spelling
  // error, then upon return misspelledLength is 0. If optional_suggestions
  // is given, then it will be filled with suggested words (not a cheap step).
  virtual void spellCheck(const WebString& text,
                          int& misspelledOffset,
                          int& misspelledLength,
                          WebVector<WebString>* optionalSuggestions) {}

  // Requests asynchronous spelling and grammar checking, whose result should be
  // returned by passed completion object.
  virtual void requestCheckingOfText(
      const WebString& textToCheck,
      const WebVector<uint32_t>& markersInText,
      const WebVector<unsigned>& markerOffsets,
      WebTextCheckingCompletion* completionCallback) {}

  // Clear all stored references to requests, so that it will not become a
  // leak source.
  virtual void cancelAllPendingRequests() {}

  // Show or hide the spelling UI.
  virtual void showSpellingUI(bool show) {}

  // Returns true if the spelling UI is showing.
  virtual bool isShowingSpellingUI() { return false; }

  // Update the spelling UI with the given word.
  virtual void updateSpellingUIWithMisspelledWord(const WebString& word) {}

 protected:
  ~WebSpellCheckClient() {}
};

}  // namespace blink

#endif