2 * (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Dirk Mueller (mueller@kde.org)
4 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
24 #include "core/rendering/RenderTextFragment.h"
26 #include "core/dom/Text.h"
27 #include "core/rendering/HitTestResult.h"
28 #include "core/rendering/RenderBlock.h"
32 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length)
33 : RenderText(node, str ? str->substring(startOffset, length) : PassRefPtr<StringImpl>(nullptr))
34 , m_start(startOffset)
40 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)
41 : RenderText(node, str)
43 , m_end(str ? str->length() : 0)
44 , m_contentString(str)
49 RenderTextFragment::~RenderTextFragment()
53 RenderText* RenderTextFragment::firstRenderTextInFirstLetter() const
55 for (RenderObject* current = m_firstLetter; current; current = current->nextInPreOrder(m_firstLetter)) {
56 if (current->isText())
57 return toRenderText(current);
62 PassRefPtr<StringImpl> RenderTextFragment::originalText() const
65 RefPtr<StringImpl> result = ((e && e->isTextNode()) ? toText(e)->dataImpl() : contentString());
68 return result->substring(start(), end());
71 void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
73 RenderText::styleDidChange(diff, oldStyle);
75 if (RenderBlock* block = blockForAccompanyingFirstLetter()) {
76 block->style()->removeCachedPseudoStyle(FIRST_LETTER);
77 block->updateFirstLetter();
81 void RenderTextFragment::willBeDestroyed()
84 m_firstLetter->destroy();
85 RenderText::willBeDestroyed();
88 void RenderTextFragment::setText(PassRefPtr<StringImpl> text, bool force)
90 RenderText::setText(text, force);
95 // FIXME: We should not modify the structure of the render tree during
96 // layout. crbug.com/370458
97 DeprecatedDisableModifyRenderTreeStructureAsserts disabler;
99 ASSERT(!m_contentString);
100 m_firstLetter->destroy();
102 if (Node* t = node()) {
103 ASSERT(!t->renderer());
104 t->setRenderer(this);
109 void RenderTextFragment::transformText()
111 // Don't reset first-letter here because we are only transforming the truncated fragment.
112 if (RefPtr<StringImpl> textToTransform = originalText())
113 RenderText::setText(textToTransform.release(), true);
116 UChar RenderTextFragment::previousCharacter() const
120 StringImpl* original = ((e && e->isTextNode()) ? toText(e)->dataImpl() : contentString());
121 if (original && start() <= original->length())
122 return (*original)[start() - 1];
125 return RenderText::previousCharacter();
128 RenderBlock* RenderTextFragment::blockForAccompanyingFirstLetter() const
132 for (RenderObject* block = m_firstLetter->parent(); block; block = block->parent()) {
133 if (block->style()->hasPseudoStyle(FIRST_LETTER) && block->canHaveChildren() && block->isRenderBlock())
134 return toRenderBlock(block);
139 void RenderTextFragment::updateHitTestResult(HitTestResult& result, const LayoutPoint& point)
141 if (result.innerNode())
144 RenderObject::updateHitTestResult(result, point);
145 if (m_firstLetter || !node())
147 RenderObject* nodeRenderer = node()->renderer();
148 if (!nodeRenderer || !nodeRenderer->isText() || !toRenderText(nodeRenderer)->isTextFragment())
151 if (isDescendantOf(toRenderTextFragment(nodeRenderer)->m_firstLetter))
152 result.setIsFirstLetter(true);
155 } // namespace WebCore