--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderSVGRoot.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,336 @@
+/*
+ Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
+ 2004, 2005, 2007, 2008, 2009 Rob Buis <buis@kde.org>
+ 2007 Eric Seidel <eric@webkit.org>
+ 2009 Google, Inc.
+
+ 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 "HitTestResult.h"
+#include "RenderSVGContainer.h"
+#include "RenderSVGResource.h"
+#include "RenderView.h"
+#include "SVGLength.h"
+#include "SVGRenderSupport.h"
+#include "SVGSVGElement.h"
+#include "SVGStyledElement.h"
+#include "TransformState.h"
+
+#if ENABLE(FILTERS)
+#include "RenderSVGResourceFilter.h"
+#endif
+
+using namespace std;
+
+namespace WebCore {
+
+RenderSVGRoot::RenderSVGRoot(SVGStyledElement* node)
+ : RenderBox(node)
+ , m_isLayoutSizeChanged(false)
+{
+ setReplaced(true);
+}
+
+int RenderSVGRoot::lineHeight(bool, bool) const
+{
+ return height() + marginTop() + marginBottom();
+}
+
+int RenderSVGRoot::baselinePosition(bool, bool) const
+{
+ return height() + marginTop() + marginBottom();
+}
+
+void RenderSVGRoot::calcPrefWidths()
+{
+ ASSERT(prefWidthsDirty());
+
+ int borderAndPadding = borderAndPaddingWidth();
+ int width = calcReplacedWidth(false) + borderAndPadding;
+
+ if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength)
+ width = min(width, style()->maxWidth().value() + (style()->boxSizing() == CONTENT_BOX ? borderAndPadding : 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);
+}
+
+int RenderSVGRoot::calcReplacedWidth(bool includeMaxWidth) const
+{
+ int replacedWidth = RenderBox::calcReplacedWidth(includeMaxWidth);
+ if (!style()->width().isPercent())
+ return replacedWidth;
+
+ // FIXME: Investigate in size rounding issues
+ SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
+ return static_cast<int>(roundf(replacedWidth * svg->currentScale()));
+}
+
+int RenderSVGRoot::calcReplacedHeight() const
+{
+ int replacedHeight = RenderBox::calcReplacedHeight();
+ if (!style()->height().isPercent())
+ return replacedHeight;
+
+ // FIXME: Investigate in size rounding issues
+ SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
+ return static_cast<int>(roundf(replacedHeight * svg->currentScale()));
+}
+
+void RenderSVGRoot::layout()
+{
+ ASSERT(needsLayout());
+
+ // Arbitrary affine transforms are incompatible with LayoutState.
+ view()->disableLayoutState();
+
+ bool needsLayout = selfNeedsLayout();
+ LayoutRepainter repainter(*this, needsLayout && m_everHadLayout && checkForRepaintDuringLayout());
+
+ IntSize oldSize(width(), height());
+ calcWidth();
+ calcHeight();
+ calcViewport();
+
+ SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
+ m_isLayoutSizeChanged = svg->hasRelativeLengths() && oldSize != size();
+
+ SVGRenderSupport::layoutChildren(this, needsLayout);
+ m_isLayoutSizeChanged = false;
+
+ repainter.repaintAfterLayout();
+
+ view()->enableLayoutState();
+ setNeedsLayout(false);
+}
+
+bool RenderSVGRoot::selfWillPaint() const
+{
+#if ENABLE(FILTERS)
+ const SVGRenderStyle* svgStyle = style()->svgStyle();
+ RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(document(), svgStyle->filterResource());
+ if (filter)
+ return true;
+#endif
+ return false;
+}
+
+void RenderSVGRoot::paint(PaintInfo& paintInfo, int parentX, int parentY)
+{
+ if (paintInfo.context->paintingDisabled())
+ return;
+
+ bool isVisible = style()->visibility() == VISIBLE;
+ IntPoint parentOriginInContainer(parentX, parentY);
+ IntPoint borderBoxOriginInContainer = parentOriginInContainer + parentOriginToBorderBox();
+
+ if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseBlockBackground || paintInfo.phase == PaintPhaseChildBlockBackground) && isVisible)
+ paintBoxDecorations(paintInfo, borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y());
+
+ if (paintInfo.phase == PaintPhaseBlockBackground)
+ return;
+
+ // An empty viewport disables rendering. FIXME: Should we still render filters?
+ if (m_viewportSize.isEmpty())
+ return;
+
+ // Don't paint if we don't have kids, except if we have filters we should paint those.
+ if (!firstChild() && !selfWillPaint())
+ return;
+
+ // Make a copy of the PaintInfo because applyTransform will modify the damage rect.
+ PaintInfo childPaintInfo(paintInfo);
+ childPaintInfo.context->save();
+
+ // Apply initial viewport clip - not affected by overflow handling
+ childPaintInfo.context->clip(overflowClipRect(borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y()));
+
+ // Convert from container offsets (html renderers) to a relative transform (svg renderers).
+ // Transform from our paint container's coordinate system to our local coords.
+ childPaintInfo.applyTransform(localToRepaintContainerTransform(parentOriginInContainer));
+
+ bool continueRendering = true;
+ if (childPaintInfo.phase == PaintPhaseForeground)
+ continueRendering = SVGRenderSupport::prepareToRenderSVGContent(this, childPaintInfo);
+
+ if (continueRendering)
+ RenderBox::paint(childPaintInfo, 0, 0);
+
+ if (childPaintInfo.phase == PaintPhaseForeground)
+ SVGRenderSupport::finishRenderSVGContent(this, childPaintInfo, paintInfo.context);
+
+ childPaintInfo.context->restore();
+
+ if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && isVisible)
+ paintOutline(paintInfo.context, borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y(), width(), height());
+}
+
+void RenderSVGRoot::destroy()
+{
+ RenderSVGResource::invalidateAllResourcesOfRenderer(this);
+ RenderBox::destroy();
+}
+
+void RenderSVGRoot::calcViewport()
+{
+ SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
+
+ if (!svg->hasSetContainerSize()) {
+ // In the normal case of <svg> being stand-alone or in a CSSBoxModel object we use
+ // RenderBox::width()/height() (which pulls data from RenderStyle)
+ m_viewportSize = FloatSize(width(), height());
+ return;
+ }
+
+ // In the SVGImage case grab the SVGLength values off of SVGSVGElement and use
+ // the special relativeWidthValue accessors which respect the specified containerSize
+ // FIXME: Check how SVGImage + zooming is supposed to be handled?
+ SVGLength width = svg->width();
+ SVGLength height = svg->height();
+ m_viewportSize = FloatSize(width.unitType() == LengthTypePercentage ? svg->relativeWidthValue() : width.value(svg),
+ height.unitType() == LengthTypePercentage ? svg->relativeHeightValue() : height.value(svg));
+}
+
+// RenderBox methods will expect coordinates w/o any transforms in coordinates
+// relative to our borderBox origin. This method gives us exactly that.
+AffineTransform RenderSVGRoot::localToBorderBoxTransform() const
+{
+ IntSize borderAndPadding = borderOriginToContentBox();
+ SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
+ float scale = svg->currentScale();
+ FloatPoint translate = svg->currentTranslate();
+ AffineTransform ctm(scale, 0, 0, scale, borderAndPadding.width() + translate.x(), borderAndPadding.height() + translate.y());
+ return svg->viewBoxToViewTransform(width() / scale, height() / scale) * ctm;
+}
+
+IntSize RenderSVGRoot::parentOriginToBorderBox() const
+{
+ return IntSize(x(), y());
+}
+
+IntSize RenderSVGRoot::borderOriginToContentBox() const
+{
+ return IntSize(borderLeft() + paddingLeft(), borderTop() + paddingTop());
+}
+
+AffineTransform RenderSVGRoot::localToRepaintContainerTransform(const IntPoint& parentOriginInContainer) const
+{
+ AffineTransform parentToContainer(localToParentTransform());
+ return parentToContainer.translateRight(parentOriginInContainer.x(), parentOriginInContainer.y());
+}
+
+const AffineTransform& RenderSVGRoot::localToParentTransform() const
+{
+ IntSize parentToBorderBoxOffset = parentOriginToBorderBox();
+
+ AffineTransform borderBoxOriginToParentOrigin(localToBorderBoxTransform());
+ borderBoxOriginToParentOrigin.translateRight(parentToBorderBoxOffset.width(), parentToBorderBoxOffset.height());
+
+ m_localToParentTransform = borderBoxOriginToParentOrigin;
+ return m_localToParentTransform;
+}
+
+FloatRect RenderSVGRoot::objectBoundingBox() const
+{
+ return SVGRenderSupport::computeContainerBoundingBox(this, SVGRenderSupport::ObjectBoundingBox);
+}
+
+FloatRect RenderSVGRoot::strokeBoundingBox() const
+{
+ return SVGRenderSupport::computeContainerBoundingBox(this, SVGRenderSupport::StrokeBoundingBox);
+}
+
+FloatRect RenderSVGRoot::repaintRectInLocalCoordinates() const
+{
+ FloatRect repaintRect = SVGRenderSupport::computeContainerBoundingBox(this, SVGRenderSupport::RepaintBoundingBox);
+ style()->svgStyle()->inflateForShadow(repaintRect);
+ repaintRect.inflate(borderAndPaddingWidth());
+ return repaintRect;
+}
+
+IntRect RenderSVGRoot::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)
+{
+ return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer);
+}
+
+void RenderSVGRoot::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)
+{
+ // Apply our local transforms (except for x/y translation), then our shadow,
+ // and then call RenderBox's method to handle all the normal CSS Box model bits
+ repaintRect = localToBorderBoxTransform().mapRect(repaintRect);
+
+ // Apply initial viewport clip - not affected by overflow settings
+ repaintRect.intersect(enclosingIntRect(FloatRect(FloatPoint(), m_viewportSize)));
+
+ style()->svgStyle()->inflateForShadow(repaintRect);
+ RenderBox::computeRectForRepaint(repaintContainer, repaintRect, fixed);
+}
+
+void RenderSVGRoot::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState) const
+{
+ ASSERT(!fixed); // We should have no fixed content in the SVG rendering tree.
+ ASSERT(useTransforms); // mapping a point through SVG w/o respecting trasnforms is useless.
+
+ // Transform to our border box and let RenderBox transform the rest of the way.
+ transformState.applyTransform(localToBorderBoxTransform());
+ RenderBox::mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState);
+}
+
+bool RenderSVGRoot::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int _x, int _y, int _tx, int _ty, HitTestAction hitTestAction)
+{
+ IntPoint pointInContainer(_x, _y);
+ IntSize containerToParentOffset(_tx, _ty);
+
+ IntPoint pointInParent = pointInContainer - containerToParentOffset;
+ IntPoint pointInBorderBox = pointInParent - parentOriginToBorderBox();
+
+ // Note: For now, we're ignoring hits to border and padding for <svg>
+ IntPoint pointInContentBox = pointInBorderBox - borderOriginToContentBox();
+ if (!contentBoxRect().contains(pointInContentBox))
+ return false;
+
+ IntPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
+
+ for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
+ if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {
+ // FIXME: CSS/HTML assumes the local point is relative to the border box, right?
+ updateHitTestResult(result, pointInBorderBox);
+ // FIXME: nodeAtFloatPoint() doesn't handle rect-based hit tests yet.
+ result.addNodeToRectBasedTestResult(child->node(), _x, _y);
+ return true;
+ }
+ }
+
+ // Spec: Only graphical elements can be targeted by the mouse, so we don't check self here.
+ // 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)