Move painting code from RenderPart to PartPainter.

Source/core/paint/PartPainter.cpp

+// 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/PartPainter.h"
+
+#include "core/paint/BoxPainter.h"
+
+#include "core/rendering/GraphicsContextAnnotator.h"
+#include "core/rendering/PaintInfo.h"
+#include "core/rendering/RenderLayer.h"
+#include "core/rendering/RenderPart.h"
+
+namespace blink {
+
+void PartPainter::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    ANNOTATE_GRAPHICS_CONTEXT(paintInfo, &m_renderPart);
+
+    if (!m_renderPart.shouldPaint(paintInfo, paintOffset))
+        return;
+
+    LayoutPoint adjustedPaintOffset = paintOffset + m_renderPart.location();
+
+    if (m_renderPart.hasBoxDecorationBackground() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection))
+        BoxPainter(m_renderPart).paintBoxDecorationBackground(paintInfo, adjustedPaintOffset);
+
+    if (paintInfo.phase == PaintPhaseMask) {
+        BoxPainter(m_renderPart).paintMask(paintInfo, adjustedPaintOffset);
+        return;
+    }
+
+    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && m_renderPart.style()->hasOutline())
+        ObjectPainter(m_renderPart).paintOutline(paintInfo, LayoutRect(adjustedPaintOffset, m_renderPart.size()));
+
+    if (paintInfo.phase != PaintPhaseForeground)
+        return;
+
+    if (m_renderPart.style()->hasBorderRadius()) {
+        LayoutRect borderRect = LayoutRect(adjustedPaintOffset, m_renderPart.size());
+
+        if (borderRect.isEmpty())
+            return;
+
+        // Push a clip if we have a border radius, since we want to round the foreground content that gets painted.
+        paintInfo.context->save();
+        RoundedRect roundedInnerRect = m_renderPart.style()->getRoundedInnerBorderFor(borderRect,
+            m_renderPart.paddingTop() + m_renderPart.borderTop(), m_renderPart.paddingBottom() + m_renderPart.borderBottom(), m_renderPart.paddingLeft() + m_renderPart.borderLeft(), m_renderPart.paddingRight() + m_renderPart.borderRight(), true, true);
+        BoxPainter::clipRoundedInnerRect(paintInfo.context, borderRect, roundedInnerRect);
+    }
+
+    if (m_renderPart.widget())
+        m_renderPart.paintContents(paintInfo, paintOffset);
+
+    if (m_renderPart.style()->hasBorderRadius())
+        paintInfo.context->restore();
+
+    // Paint a partially transparent wash over selected widgets.
+    if (m_renderPart.isSelected() && !m_renderPart.document().printing()) {
+        LayoutRect rect = m_renderPart.localSelectionRect();
+        rect.moveBy(adjustedPaintOffset);
+        paintInfo.context->fillRect(pixelSnappedIntRect(rect), m_renderPart.selectionBackgroundColor());
+    }
+
+    if (m_renderPart.canResize())
+        m_renderPart.layer()->scrollableArea()->paintResizer(paintInfo.context, roundedIntPoint(adjustedPaintOffset), paintInfo.rect);
+}
+
+void PartPainter::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    LayoutPoint adjustedPaintOffset = paintOffset + m_renderPart.location();
+
+    Widget* widget = m_renderPart.widget();
+    RELEASE_ASSERT(widget);
+
+    // Tell the widget to paint now. This is the only time the widget is allowed
+    // to paint itself. That way it will composite properly with z-indexed layers.
+    IntPoint widgetLocation = widget->frameRect().location();
+    IntPoint paintLocation(roundToInt(adjustedPaintOffset.x() + m_renderPart.borderLeft() + m_renderPart.paddingLeft()),
+        roundToInt(adjustedPaintOffset.y() + m_renderPart.borderTop() + m_renderPart.paddingTop()));
+    IntRect paintRect = paintInfo.rect;
+
+    IntSize widgetPaintOffset = paintLocation - widgetLocation;
+    // When painting widgets into compositing layers, tx and ty are relative to the enclosing compositing layer,
+    // not the root. In this case, shift the CTM and adjust the paintRect to be root-relative to fix plug-in drawing.
+    if (!widgetPaintOffset.isZero()) {
+        paintInfo.context->translate(widgetPaintOffset.width(), widgetPaintOffset.height());
+        paintRect.move(-widgetPaintOffset);
+    }
+    widget->paint(paintInfo.context, paintRect);
+
+    if (!widgetPaintOffset.isZero())
+        paintInfo.context->translate(-widgetPaintOffset.width(), -widgetPaintOffset.height());
+}
+
+} // namespace blink