diff -r 000000000000 -r 4f2f89ce4247 WebCore/mathml/RenderMathMLBlock.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/mathml/RenderMathMLBlock.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if ENABLE(MATHML)
+
+#include "RenderMathMLBlock.h"
+
+#include "FontSelector.h"
+#include "GraphicsContext.h"
+#include "MathMLNames.h"
+#include "RenderInline.h"
+#include "RenderText.h"
+
+namespace WebCore {
+    
+using namespace MathMLNames;
+    
+RenderMathMLBlock::RenderMathMLBlock(Node* container) 
+    : RenderBlock(container) 
+{
+}
+
+bool RenderMathMLBlock::isChildAllowed(RenderObject* child, RenderStyle*) const
+{
+    return child->node() && child->node()->nodeType() == Node::ELEMENT_NODE;
+}
+
+PassRefPtr<RenderStyle> RenderMathMLBlock::makeBlockStyle()
+{
+    RefPtr<RenderStyle> newStyle = RenderStyle::create();
+    newStyle->inheritFrom(style());
+    newStyle->setDisplay(BLOCK);
+    return newStyle;
+}
+
+int RenderMathMLBlock::nonOperatorHeight() const
+{
+    if (!isRenderMathMLOperator())
+        return offsetHeight();
+        
+    return 0;
+}
+
+void RenderMathMLBlock::stretchToHeight(int height) 
+{
+    for (RenderObject* current = firstChild(); current; current = current->nextSibling())
+       if (current->isRenderMathMLBlock()) {
+          RenderMathMLBlock* block = toRenderMathMLBlock(current);
+          block->stretchToHeight(height);
+       }
+}
+
+#if ENABLE(DEBUG_MATH_LAYOUT)
+void RenderMathMLBlock::paint(PaintInfo& info, int tx, int ty)
+{
+    RenderBlock::paint(info, tx, ty);
+    
+    if (info.context->paintingDisabled() || info.phase != PaintPhaseForeground)
+        return;
+
+    tx += x();
+    ty += y();
+    
+    info.context->save();
+    
+    info.context->setStrokeThickness(1.0f);
+    info.context->setStrokeStyle(SolidStroke);
+    info.context->setStrokeColor(Color(0, 0, 255), sRGBColorSpace);
+    
+    info.context->drawLine(IntPoint(tx, ty), IntPoint(tx + offsetWidth(), ty));
+    info.context->drawLine(IntPoint(tx + offsetWidth(), ty), IntPoint(tx + offsetWidth(), ty + offsetHeight()));
+    info.context->drawLine(IntPoint(tx, ty + offsetHeight()), IntPoint(tx + offsetWidth(), ty + offsetHeight()));
+    info.context->drawLine(IntPoint(tx, ty), IntPoint(tx, ty + offsetHeight()));
+    
+    int topStart = paddingTop();
+    
+    info.context->setStrokeColor(Color(0, 255, 0), sRGBColorSpace);
+    
+    info.context->drawLine(IntPoint(tx, ty + topStart), IntPoint(tx + offsetWidth(), ty + topStart));
+    
+    int baseline = baselinePosition(true);
+    
+    info.context->setStrokeColor(Color(255, 0, 0), sRGBColorSpace);
+    
+    info.context->drawLine(IntPoint(tx, ty + baseline), IntPoint(tx + offsetWidth(), ty + baseline));
+    
+    info.context->restore();
+    
+}
+#endif // ENABLE(DEBUG_MATH_LAYOUT)
+
+
+}    
+
+#endif