/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
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 * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * 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
 * 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,
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 */

#include "public/web/WebRange.h"

#include "core/dom/Document.h"
#include "core/dom/Range.h"
#include "core/editing/FrameSelection.h"
#include "core/editing/PlainTextRange.h"
#include "core/frame/LocalFrame.h"

namespace blink {

WebRange::WebRange(int start, int length)
    : m_start(start), m_end(start + length) {
  DCHECK(start != -1 || length != 0)
      << "These values are reserved to indicate that the range is null";
}

WebRange::WebRange(const EphemeralRange& range) {
  if (range.isNull())
    return;

  m_start = range.startPosition().computeOffsetInContainerNode();
  m_end = range.endPosition().computeOffsetInContainerNode();
}

WebRange::WebRange(const PlainTextRange& range) {
  if (range.isNull())
    return;

  m_start = range.start();
  m_end = range.end();
}

EphemeralRange WebRange::createEphemeralRange(LocalFrame* frame) const {
  Element* selectionRoot = frame->selection().rootEditableElement();
  ContainerNode* scope =
      selectionRoot ? selectionRoot : frame->document()->documentElement();

  return PlainTextRange(m_start, m_end).createRange(*scope);
}

}  // namespace blink