1 /**
2 * This file is part of the DOM implementation for KDE.
3 *
4 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
5 * Copyright (C) 2006 Apple Computer, Inc.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24 #include "config.h"
25 #include "RenderBR.h"
26
27 #include "Document.h"
28 #include "InlineTextBox.h"
29 #include "VisiblePosition.h"
30
31 namespace WebCore {
32
RenderBR(Node * node)33 RenderBR::RenderBR(Node* node)
34 : RenderText(node, StringImpl::create("\n"))
35 , m_lineHeight(-1)
36 {
37 }
38
~RenderBR()39 RenderBR::~RenderBR()
40 {
41 }
42
baselinePosition(bool firstLine,bool isRootLineBox) const43 int RenderBR::baselinePosition(bool firstLine, bool isRootLineBox) const
44 {
45 if (firstTextBox() && !firstTextBox()->isText())
46 return 0;
47 return RenderText::baselinePosition(firstLine, isRootLineBox);
48 }
49
lineHeight(bool firstLine,bool) const50 int RenderBR::lineHeight(bool firstLine, bool /*isRootLineBox*/) const
51 {
52 if (firstTextBox() && !firstTextBox()->isText())
53 return 0;
54
55 if (firstLine) {
56 RenderStyle* s = style(firstLine);
57 Length lh = s->lineHeight();
58 if (lh.isNegative()) {
59 if (s == style()) {
60 if (m_lineHeight == -1)
61 m_lineHeight = RenderObject::lineHeight(false);
62 return m_lineHeight;
63 }
64 return s->font().lineSpacing();
65 }
66 if (lh.isPercent())
67 return lh.calcMinValue(s->fontSize());
68 return lh.value();
69 }
70
71 if (m_lineHeight == -1)
72 m_lineHeight = RenderObject::lineHeight(false);
73 return m_lineHeight;
74 }
75
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)76 void RenderBR::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
77 {
78 RenderText::styleDidChange(diff, oldStyle);
79 m_lineHeight = -1;
80 }
81
caretMinOffset() const82 int RenderBR::caretMinOffset() const
83 {
84 return 0;
85 }
86
caretMaxOffset() const87 int RenderBR::caretMaxOffset() const
88 {
89 return 1;
90 }
91
caretMaxRenderedOffset() const92 unsigned RenderBR::caretMaxRenderedOffset() const
93 {
94 return 1;
95 }
96
positionForPoint(const IntPoint &)97 VisiblePosition RenderBR::positionForPoint(const IntPoint&)
98 {
99 return createVisiblePosition(0, DOWNSTREAM);
100 }
101
102 } // namespace WebCore
103