1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2001 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
6 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
7 * Copyright (C) 2011 Google Inc. All rights reserved.
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * Library General Public License for more details.
18 *
19 * You should have received a copy of the GNU Library General Public License
20 * along with this library; see the file COPYING.LIB.  If not, write to
21 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
23 *
24 */
25
26#ifndef RenderTreeBuilder_h
27#define RenderTreeBuilder_h
28
29#include "core/dom/Document.h"
30#include "core/dom/Node.h"
31#include "core/dom/NodeRenderingTraversal.h"
32#include "wtf/RefPtr.h"
33
34namespace blink {
35
36class ContainerNode;
37class RenderObject;
38class RenderStyle;
39
40class RenderTreeBuilder {
41    STACK_ALLOCATED();
42public:
43    RenderTreeBuilder(Node* node, RenderStyle* style)
44        : m_node(node)
45        , m_renderingParent(nullptr)
46        , m_style(style)
47    {
48        ASSERT(!node->renderer());
49        ASSERT(node->needsAttach());
50        ASSERT(node->document().inStyleRecalc());
51
52        // FIXME: We should be able to ASSERT(node->inActiveDocument()) but childrenChanged is called
53        // before ChildNodeInsertionNotifier in ContainerNode's methods and some implementations
54        // will trigger a layout inside childrenChanged.
55        // Mainly HTMLTextAreaElement::childrenChanged calls HTMLTextFormControlElement::setSelectionRange
56        // which does an updateLayoutIgnorePendingStylesheets.
57
58        m_renderingParent = NodeRenderingTraversal::parent(node, &m_parentDetails);
59    }
60
61    void createRendererForTextIfNeeded();
62    void createRendererForElementIfNeeded();
63
64private:
65    RenderObject* parentRenderer() const;
66    RenderObject* nextRenderer() const;
67    bool shouldCreateRenderer() const;
68    RenderStyle& style() const;
69
70    RawPtrWillBeMember<Node> m_node;
71    RawPtrWillBeMember<ContainerNode> m_renderingParent;
72    NodeRenderingTraversal::ParentDetails m_parentDetails;
73    mutable RefPtr<RenderStyle> m_style;
74};
75
76} // namespace blink
77
78#endif
79