1 files changed, 117 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderTextFragment.cpp b/Source/WebCore/rendering/RenderTextFragment.cpp
new file mode 100644
index 0000000..ec62d85
--- /dev/null
+++ b/Source/WebCore/rendering/RenderTextFragment.cpp
@@ -0,0 +1,117 @@
+/*
+ * (C) 1999 Lars Knoll (knoll@kde.org)
+ * (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "RenderTextFragment.h"
+
+#include "RenderBlock.h"
+#include "Text.h"
+
+namespace WebCore {
+
+RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length)
+    : RenderText(node, str ? str->substring(startOffset, length) : 0)
+    , m_start(startOffset)
+    , m_end(length)
+    , m_firstLetter(0)
+{
+}
+
+RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)
+    : RenderText(node, str)
+    , m_start(0)
+    , m_end(str ? str->length() : 0)
+    , m_contentString(str)
+    , m_firstLetter(0)
+{
+}
+
+RenderTextFragment::~RenderTextFragment()
+{
+}
+
+PassRefPtr<StringImpl> RenderTextFragment::originalText() const
+{
+    Node* e = node();
+    RefPtr<StringImpl> result = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
+    if (!result)
+        return 0;
+    return result->substring(start(), end());
+}
+
+void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+{
+    RenderText::styleDidChange(diff, oldStyle);
+
+    if (RenderBlock* block = blockForAccompanyingFirstLetter()) {
+        block->style()->removeCachedPseudoStyle(FIRST_LETTER);
+        block->updateFirstLetter();
+    }
+}
+
+void RenderTextFragment::destroy()
+{
+    if (m_firstLetter)
+        m_firstLetter->destroy();
+    RenderText::destroy();
+}
+
+void RenderTextFragment::setTextInternal(PassRefPtr<StringImpl> text)
+{
+    RenderText::setTextInternal(text);
+    if (m_firstLetter) {
+        ASSERT(!m_contentString);
+        m_firstLetter->destroy();
+        m_firstLetter = 0;
+        m_start = 0;
+        m_end = textLength();
+        if (Node* t = node()) {
+            ASSERT(!t->renderer());
+            t->setRenderer(this);
+        }
+    }
+}
+
+UChar RenderTextFragment::previousCharacter() const
+{
+    if (start()) {
+        Node* e = node();
+        StringImpl*  original = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
+        if (original && start() <= original->length())
+            return (*original)[start() - 1];
+    }
+
+    return RenderText::previousCharacter();
+}
+
+RenderBlock* RenderTextFragment::blockForAccompanyingFirstLetter() const
+{
+    if (!m_firstLetter)
+        return 0;
+    for (RenderObject* block = m_firstLetter->parent(); block; block = block->parent()) {
+        if (block->style()->hasPseudoStyle(FIRST_LETTER) && block->canHaveChildren() && block->isRenderBlock())
+            return toRenderBlock(block);
+    }
+    return 0;
+}
+
+} // namespace WebCore