1 /**
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2006 Apple Computer, Inc.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22 #include "config.h"
23 #include "RenderBR.h"
24
25 #include "Document.h"
26 #include "InlineTextBox.h"
27 #include "VisiblePosition.h"
28
29 namespace WebCore {
30
RenderBR(Node * node)31 RenderBR::RenderBR(Node* node)
32 : RenderText(node, StringImpl::create("\n"))
33 , m_lineHeight(-1)
34 {
35 }
36
~RenderBR()37 RenderBR::~RenderBR()
38 {
39 }
40
lineHeight(bool firstLine) const41 int RenderBR::lineHeight(bool firstLine) const
42 {
43 if (firstLine && document()->usesFirstLineRules()) {
44 RenderStyle* s = style(firstLine);
45 if (s != style())
46 return s->computedLineHeight();
47 }
48
49 if (m_lineHeight == -1)
50 m_lineHeight = style()->computedLineHeight();
51
52 return m_lineHeight;
53 }
54
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)55 void RenderBR::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
56 {
57 RenderText::styleDidChange(diff, oldStyle);
58 m_lineHeight = -1;
59 }
60
caretMinOffset() const61 int RenderBR::caretMinOffset() const
62 {
63 return 0;
64 }
65
caretMaxOffset() const66 int RenderBR::caretMaxOffset() const
67 {
68 return 1;
69 }
70
caretMaxRenderedOffset() const71 unsigned RenderBR::caretMaxRenderedOffset() const
72 {
73 return 1;
74 }
75
positionForPoint(const IntPoint &)76 VisiblePosition RenderBR::positionForPoint(const IntPoint&)
77 {
78 return createVisiblePosition(0, DOWNSTREAM);
79 }
80
81 } // namespace WebCore
82