third_party/blink/renderer/core/editing/reveal_selection_scope.cc

/*
 * 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
 *    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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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
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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/editing/reveal_selection_scope.h"

#include "third_party/blink/renderer/core/editing/editor.h"
#include "third_party/blink/renderer/core/editing/frame_selection.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"

namespace blink {

RevealSelectionScope::RevealSelectionScope(LocalFrame& frame) : frame_(&frame) {
  GetEditor().IncreasePreventRevealSelection();
}

RevealSelectionScope::~RevealSelectionScope() {
  DCHECK(GetEditor().PreventRevealSelection());
  GetEditor().DecreasePreventRevealSelection();
  if (!GetEditor().PreventRevealSelection()) {
    frame_->Selection().RevealSelection(ScrollAlignment::kAlignToEdgeIfNeeded,
                                        kRevealExtent);
  }
}

Editor& RevealSelectionScope::GetEditor() {
  return frame_->GetEditor();
}

void RevealSelectionScope::Trace(blink::Visitor* visitor) {
  visitor->Trace(frame_);
}

}  // namespace blink