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      1 /**
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) 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 "core/rendering/RenderBR.h"
     24 
     25 #include "core/dom/Document.h"
     26 #include "core/dom/StyleEngine.h"
     27 #include "core/editing/PositionWithAffinity.h"
     28 #include "core/rendering/RenderView.h"
     29 
     30 namespace blink {
     31 
     32 static PassRefPtr<StringImpl> newlineString()
     33 {
     34     DEFINE_STATIC_LOCAL(const String, string, ("\n"));
     35     return string.impl();
     36 }
     37 
     38 RenderBR::RenderBR(Node* node)
     39     : RenderText(node, newlineString())
     40 {
     41 }
     42 
     43 RenderBR::~RenderBR()
     44 {
     45 }
     46 
     47 int RenderBR::lineHeight(bool firstLine) const
     48 {
     49     RenderStyle* s = style(firstLine && document().styleEngine()->usesFirstLineRules());
     50     return s->computedLineHeight();
     51 }
     52 
     53 void RenderBR::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
     54 {
     55     RenderText::styleDidChange(diff, oldStyle);
     56 }
     57 
     58 int RenderBR::caretMinOffset() const
     59 {
     60     return 0;
     61 }
     62 
     63 int RenderBR::caretMaxOffset() const
     64 {
     65     return 1;
     66 }
     67 
     68 PositionWithAffinity RenderBR::positionForPoint(const LayoutPoint&)
     69 {
     70     return createPositionWithAffinity(0, DOWNSTREAM);
     71 }
     72 
     73 } // namespace blink
     74