Move painting code from RenderFieldset to FieldsetPainter.

Source/core/paint/FieldsetPainter.cpp

Index: Source/core/paint/FieldsetPainter.cpp
diff --git a/Source/core/paint/FieldsetPainter.cpp b/Source/core/paint/FieldsetPainter.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..92270d6979e79defaf8461686b4ea056a36d5549
--- /dev/null
+++ b/Source/core/paint/FieldsetPainter.cpp
@@ -0,0 +1,96 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/paint/FieldsetPainter.h"
+
+#include "core/paint/BoxDecorationData.h"
+#include "core/paint/BoxPainter.h"
+#include "core/paint/DrawingRecorder.h"
+#include "core/rendering/PaintInfo.h"
+#include "core/rendering/RenderFieldset.h"
+
+namespace blink {
+
+void FieldsetPainter::paintBoxDecorationBackground(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    if (!paintInfo.shouldPaintWithinRoot(&m_renderFieldset))
+        return;
+
+    LayoutRect paintRect(paintOffset, m_renderFieldset.size());
+    RenderBox* legend = m_renderFieldset.findLegend();
+    if (!legend)
+        return BoxPainter(m_renderFieldset).paintBoxDecorationBackground(paintInfo, paintOffset);
+
+    // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
+    // cases the legend is embedded in the right and bottom borders respectively.
+    // https://bugs.webkit.org/show_bug.cgi?id=47236
+    if (m_renderFieldset.style()->isHorizontalWritingMode()) {
+        LayoutUnit yOff = (legend->y() > 0) ? LayoutUnit() : (legend->height() - m_renderFieldset.borderTop()) / 2;
+        paintRect.setHeight(paintRect.height() - yOff);
+        paintRect.setY(paintRect.y() + yOff);
+    } else {
+        LayoutUnit xOff = (legend->x() > 0) ? LayoutUnit() : (legend->width() - m_renderFieldset.borderLeft()) / 2;
+        paintRect.setWidth(paintRect.width() - xOff);
+        paintRect.setX(paintRect.x() + xOff);
+    }
+
+    BoxDecorationData boxDecorationData(*m_renderFieldset.style(), m_renderFieldset.canRenderBorderImage(), m_renderFieldset.backgroundHasOpaqueTopLayer(), paintInfo.context);
+    DrawingRecorder recorder(paintInfo.context, &m_renderFieldset, paintInfo.phase, pixelSnappedIntRect(paintOffset, paintRect.size()));
+
+    if (boxDecorationData.bleedAvoidance() == BackgroundBleedNone)
+        BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderFieldset.style(), Normal);
+    BoxPainter(m_renderFieldset).paintFillLayers(paintInfo, boxDecorationData.backgroundColor, m_renderFieldset.style()->backgroundLayers(), paintRect);
+    BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderFieldset.style(), Inset);
+
+    if (!boxDecorationData.hasBorder)
+        return;
+
+    // Create a clipping region around the legend and paint the border as normal
+    GraphicsContext* graphicsContext = paintInfo.context;
+    GraphicsContextStateSaver stateSaver(*graphicsContext);
+
+    // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
+    // cases the legend is embedded in the right and bottom borders respectively.
+    // https://bugs.webkit.org/show_bug.cgi?id=47236
+    if (m_renderFieldset.style()->isHorizontalWritingMode()) {
+        LayoutUnit clipTop = paintRect.y();
+        LayoutUnit clipHeight = max(static_cast<LayoutUnit>(m_renderFieldset.style()->borderTopWidth()), legend->height() - ((legend->height() - m_renderFieldset.borderTop()) / 2));
+        graphicsContext->clipOut(pixelSnappedIntRect(paintRect.x() + legend->x(), clipTop, legend->width(), clipHeight));
+    } else {
+        LayoutUnit clipLeft = paintRect.x();
+        LayoutUnit clipWidth = max(static_cast<LayoutUnit>(m_renderFieldset.style()->borderLeftWidth()), legend->width());
+        graphicsContext->clipOut(pixelSnappedIntRect(clipLeft, paintRect.y() + legend->y(), clipWidth, legend->height()));
+    }
+
+    BoxPainter::paintBorder(m_renderFieldset, paintInfo, paintRect, m_renderFieldset.style());
+}
+
+void FieldsetPainter::paintMask(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    if (m_renderFieldset.style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
+        return;
+
+    LayoutRect paintRect = LayoutRect(paintOffset, m_renderFieldset.size());
+    RenderBox* legend = m_renderFieldset.findLegend();
+    if (!legend)
+        return BoxPainter(m_renderFieldset).paintMask(paintInfo, paintOffset);
+
+    // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
+    // cases the legend is embedded in the right and bottom borders respectively.
+    // https://bugs.webkit.org/show_bug.cgi?id=47236
+    if (m_renderFieldset.style()->isHorizontalWritingMode()) {
+        LayoutUnit yOff = (legend->y() > 0) ? LayoutUnit() : (legend->height() - m_renderFieldset.borderTop()) / 2;
+        paintRect.expand(0, -yOff);
+        paintRect.move(0, yOff);
+    } else {
+        LayoutUnit xOff = (legend->x() > 0) ? LayoutUnit() : (legend->width() - m_renderFieldset.borderLeft()) / 2;
+        paintRect.expand(-xOff, 0);
+        paintRect.move(xOff, 0);
+    }
+
+    BoxPainter(m_renderFieldset).paintMaskImages(paintInfo, paintRect);
+}
+
+} // namespace blink