auto import from //depot/cupcake/@135843

1 files changed, 334 insertions, 0 deletions

diff --git a/WebCore/rendering/RenderSVGRoot.cpp b/WebCore/rendering/RenderSVGRoot.cpp
new file mode 100644
index 0000000..1c59450
--- /dev/null
+++ b/WebCore/rendering/RenderSVGRoot.cpp
@@ -0,0 +1,334 @@
+/*
+    Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
+                  2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
+                  2007 Eric Seidel <eric@webkit.org>
+
+    This file is part of the KDE project
+
+    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
+    aint 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"
+
+#if ENABLE(SVG)
+#include "RenderSVGRoot.h"
+
+#include "GraphicsContext.h"
+#include "RenderPath.h"
+#include "RenderSVGContainer.h"
+#include "RenderView.h"
+#include "SVGLength.h"
+#include "SVGRenderSupport.h"
+#include "SVGResourceClipper.h"
+#include "SVGResourceFilter.h"
+#include "SVGResourceMasker.h"
+#include "SVGSVGElement.h"
+#include "SVGStyledElement.h"
+#include "SVGURIReference.h"
+
+using namespace std;
+
+namespace WebCore {
+
+RenderSVGRoot::RenderSVGRoot(SVGStyledElement* node)
+    : RenderContainer(node)
+{
+    setReplaced(true);
+}
+
+RenderSVGRoot::~RenderSVGRoot()
+{
+}
+
+int RenderSVGRoot::lineHeight(bool b, bool isRootLineBox) const
+{
+    return height() + marginTop() + marginBottom();
+}
+
+int RenderSVGRoot::baselinePosition(bool b, bool isRootLineBox) const
+{
+    return height() + marginTop() + marginBottom();
+}
+
+void RenderSVGRoot::calcPrefWidths()
+{
+    ASSERT(prefWidthsDirty());
+
+    int paddingAndBorders = paddingLeft() + paddingRight() + borderLeft() + borderRight();
+    int width = calcReplacedWidth(false) + paddingAndBorders;
+
+    if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength)
+        width = min(width, style()->maxWidth().value() + (style()->boxSizing() == CONTENT_BOX ? paddingAndBorders : 0));
+
+    if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent())) {
+        m_minPrefWidth = 0;
+        m_maxPrefWidth = width;
+    } else
+        m_minPrefWidth = m_maxPrefWidth = width;
+
+    setPrefWidthsDirty(false);
+}
+
+void RenderSVGRoot::layout()
+{
+    ASSERT(needsLayout());
+
+    calcViewport();
+
+    // Arbitrary affine transforms are incompatible with LayoutState.
+    view()->disableLayoutState();
+
+    IntRect oldBounds = m_absoluteBounds;
+    IntRect oldOutlineBox;
+    bool checkForRepaint = checkForRepaintDuringLayout() && selfNeedsLayout();
+    if (checkForRepaint)
+        oldOutlineBox = absoluteOutlineBox();
+
+    calcWidth();
+    calcHeight();
+
+    m_absoluteBounds = absoluteClippedOverflowRect();
+    SVGSVGElement* svg = static_cast<SVGSVGElement*>(element());
+    m_width = static_cast<int>(m_width * svg->currentScale());
+    m_height = static_cast<int>(m_height * svg->currentScale());
+    
+    for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
+        if (selfNeedsLayout()) // either bounds or transform changed, force kids to relayout
+            child->setNeedsLayout(true);
+        
+        child->layoutIfNeeded();
+        ASSERT(!child->needsLayout());
+    }
+
+    if (checkForRepaint)
+        repaintAfterLayoutIfNeeded(oldBounds, oldOutlineBox);
+
+    view()->enableLayoutState();
+    setNeedsLayout(false);
+}
+
+void RenderSVGRoot::applyContentTransforms(PaintInfo& paintInfo, int parentX, int parentY)
+{
+    // Translate from parent offsets (html renderers) to a relative transform (svg renderers)
+    IntPoint origin;
+    origin.move(parentX, parentY);
+    origin.move(m_x, m_y);
+    origin.move(borderLeft(), borderTop());
+    origin.move(paddingLeft(), paddingTop());
+
+    if (origin.x() || origin.y()) {
+        paintInfo.context->concatCTM(AffineTransform().translate(origin.x(), origin.y()));
+        paintInfo.rect.move(-origin.x(), -origin.y());
+    }
+
+    // Respect scroll offset caused by html parents
+    AffineTransform ctm = RenderContainer::absoluteTransform();
+    paintInfo.rect.move(static_cast<int>(ctm.e()), static_cast<int>(ctm.f()));
+
+    SVGSVGElement* svg = static_cast<SVGSVGElement*>(element());
+    paintInfo.context->concatCTM(AffineTransform().scale(svg->currentScale()));
+
+    if (!viewport().isEmpty()) {
+        if (style()->overflowX() != OVISIBLE)
+            paintInfo.context->clip(enclosingIntRect(viewport())); // FIXME: Eventually we'll want float-precision clipping
+        
+        paintInfo.context->concatCTM(AffineTransform().translate(viewport().x(), viewport().y()));
+    }
+
+    paintInfo.context->concatCTM(AffineTransform().translate(svg->currentTranslate().x(), svg->currentTranslate().y()));
+}
+
+void RenderSVGRoot::paint(PaintInfo& paintInfo, int parentX, int parentY)
+{
+    if (paintInfo.context->paintingDisabled())
+        return;
+
+    calcViewport();
+
+    SVGSVGElement* svg = static_cast<SVGSVGElement*>(element());
+    // A value of zero disables rendering of the element. 
+    if (viewport().width() <= 0. || viewport().height() <= 0.)
+        return;
+
+    // This should only exist for <svg> renderers
+    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 
+        paintBoxDecorations(paintInfo, m_x + parentX, m_y + parentY);
+
+    if (!firstChild()) {
+#if ENABLE(SVG_FILTERS)
+        // Spec: groups w/o children still may render filter content.
+        const SVGRenderStyle* svgStyle = style()->svgStyle();
+        SVGResourceFilter* filter = getFilterById(document(), svgStyle->filter());
+        if (!filter)
+#endif
+            return;
+    }
+
+    RenderObject::PaintInfo childPaintInfo(paintInfo);
+    childPaintInfo.context->save();
+ 
+    applyContentTransforms(childPaintInfo, parentX, parentY);
+
+    SVGResourceFilter* filter = 0;
+
+    FloatRect boundingBox = relativeBBox(true);
+    if (childPaintInfo.phase == PaintPhaseForeground)
+        prepareToRenderSVGContent(this, childPaintInfo, boundingBox, filter);        
+
+    childPaintInfo.context->concatCTM(svg->viewBoxToViewTransform(width(), height()));
+    RenderContainer::paint(childPaintInfo, 0, 0);
+
+    if (childPaintInfo.phase == PaintPhaseForeground)
+        finishRenderSVGContent(this, childPaintInfo, boundingBox, filter, paintInfo.context);
+
+    childPaintInfo.context->restore();
+    
+    if ((childPaintInfo.phase == PaintPhaseOutline || childPaintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE)
+        paintOutline(childPaintInfo.context, m_absoluteBounds.x(), m_absoluteBounds.y(), m_absoluteBounds.width(), m_absoluteBounds.height(), style());
+}
+
+FloatRect RenderSVGRoot::viewport() const
+{
+    return m_viewport;
+}
+
+void RenderSVGRoot::calcViewport()
+{
+    SVGElement* svgelem = static_cast<SVGElement*>(element());
+    if (svgelem->hasTagName(SVGNames::svgTag)) {
+        SVGSVGElement* svg = static_cast<SVGSVGElement*>(element());
+
+        if (!selfNeedsLayout() && !svg->hasRelativeValues())
+            return;
+
+        float w, h;
+        SVGLength width = svg->width();
+        if (width.unitType() == LengthTypePercentage && svg->hasSetContainerSize())
+            w = svg->relativeWidthValue();
+        else
+            w = width.value(svg);
+        
+        SVGLength height = svg->height();
+        if (height.unitType() == LengthTypePercentage && svg->hasSetContainerSize())
+            h = svg->relativeHeightValue();
+        else
+            h = height.value(svg);
+
+        m_viewport = FloatRect(0, 0, w, h);
+    }
+}
+
+IntRect RenderSVGRoot::absoluteClippedOverflowRect()
+{
+    IntRect repaintRect;
+
+    for (RenderObject* current = firstChild(); current != 0; current = current->nextSibling())
+        repaintRect.unite(current->absoluteClippedOverflowRect());
+
+#if ENABLE(SVG_FILTERS)
+    // Filters can expand the bounding box
+    SVGResourceFilter* filter = getFilterById(document(), style()->svgStyle()->filter());
+    if (filter)
+        repaintRect.unite(enclosingIntRect(filter->filterBBoxForItemBBox(repaintRect)));
+#endif
+
+    return repaintRect;
+}
+
+void RenderSVGRoot::addFocusRingRects(GraphicsContext* graphicsContext, int, int)
+{
+    graphicsContext->addFocusRingRect(m_absoluteBounds);
+}
+
+void RenderSVGRoot::absoluteRects(Vector<IntRect>& rects, int, int)
+{
+    for (RenderObject* current = firstChild(); current != 0; current = current->nextSibling())
+        current->absoluteRects(rects, 0, 0);
+}
+
+AffineTransform RenderSVGRoot::absoluteTransform() const
+{
+    AffineTransform ctm = RenderContainer::absoluteTransform();
+    ctm.translate(m_x, m_y);
+    SVGSVGElement* svg = static_cast<SVGSVGElement*>(element());
+    ctm.scale(svg->currentScale());
+    ctm.translate(svg->currentTranslate().x(), svg->currentTranslate().y());
+    ctm.translate(viewport().x(), viewport().y());
+    return svg->viewBoxToViewTransform(width(), height()) * ctm;
+}
+
+FloatRect RenderSVGRoot::relativeBBox(bool includeStroke) const
+{
+    FloatRect rect;
+    
+    RenderObject* current = firstChild();
+    for (; current != 0; current = current->nextSibling()) {
+        FloatRect childBBox = current->relativeBBox(includeStroke);
+        FloatRect mappedBBox = current->localTransform().mapRect(childBBox);
+        // <svg> can have a viewBox contributing to the bbox
+        if (current->isSVGContainer())
+            mappedBBox = static_cast<RenderSVGContainer*>(current)->viewportTransform().mapRect(mappedBBox);
+        rect.unite(mappedBBox);
+    }
+
+    return rect;
+}
+
+AffineTransform RenderSVGRoot::localTransform() const
+{
+    return AffineTransform();
+}
+
+bool RenderSVGRoot::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int _x, int _y, int _tx, int _ty, HitTestAction hitTestAction)
+{
+    AffineTransform ctm = RenderContainer::absoluteTransform();
+
+    int sx = (_tx - static_cast<int>(ctm.e())); // scroll offset
+    int sy = (_ty - static_cast<int>(ctm.f())); // scroll offset
+ 
+    if (!viewport().isEmpty()
+        && style()->overflowX() == OHIDDEN
+        && style()->overflowY() == OHIDDEN) {
+        int tx = m_x - _tx + sx;
+        int ty = m_y - _ty + sy;
+
+        // Check if we need to do anything at all.
+        IntRect overflowBox = overflowRect(false);
+        overflowBox.move(tx, ty);
+        ctm.translate(viewport().x(), viewport().y());
+        double localX, localY;
+        ctm.inverse().map(_x - _tx, _y - _ty, &localX, &localY);
+        if (!overflowBox.contains((int)localX, (int)localY))
+            return false;
+    }
+
+    for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
+        if (child->nodeAtPoint(request, result, _x - sx, _y - sy, 0, 0, hitTestAction)) {
+            updateHitTestResult(result, IntPoint(_x - _tx, _y - _ty));
+            return true;
+        }
+    }
+    
+    // Spec: Only graphical elements can be targeted by the mouse, period.
+    // 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
+    return false;
+}
+
+}
+
+#endif // ENABLE(SVG)
+
+// vim:ts=4:noet