/* | |
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 "RenderSVGContainer.h" | |
#include "RenderView.h" | |
#include "SVGLength.h" | |
#include "SVGRenderSupport.h" | |
#include "SVGSVGElement.h" | |
#include "SVGStyledElement.h" | |
#include "TransformState.h" | |
#if ENABLE(FILTERS) | |
#include "SVGResourceFilter.h" | |
#endif | |
using namespace std; | |
namespace WebCore { | |
RenderSVGRoot::RenderSVGRoot(SVGStyledElement* node) | |
: RenderBox(node) | |
{ | |
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 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); | |
} | |
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, checkForRepaintDuringLayout() && needsLayout); | |
IntSize oldSize(width(), height()); | |
calcWidth(); | |
calcHeight(); | |
calcViewport(); | |
// RenderSVGRoot needs to take special care to propagate window size changes to the children, | |
// if the outermost <svg> is using relative x/y/width/height values. Hence the additonal parameters. | |
SVGSVGElement* svg = static_cast<SVGSVGElement*>(node()); | |
layoutChildren(this, needsLayout || (svg->hasRelativeValues() && oldSize != size())); | |
repainter.repaintAfterLayout(); | |
view()->enableLayoutState(); | |
setNeedsLayout(false); | |
} | |
bool RenderSVGRoot::selfWillPaint() const | |
{ | |
#if ENABLE(FILTERS) | |
const SVGRenderStyle* svgStyle = style()->svgStyle(); | |
SVGResourceFilter* filter = getFilterById(document(), svgStyle->filter(), this); | |
if (filter) | |
return true; | |
#endif | |
return false; | |
} | |
void RenderSVGRoot::paint(PaintInfo& paintInfo, int parentX, int parentY) | |
{ | |
if (paintInfo.context->paintingDisabled()) | |
return; | |
IntPoint parentOriginInContainer(parentX, parentY); | |
IntPoint borderBoxOriginInContainer = parentOriginInContainer + parentOriginToBorderBox(); | |
if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) | |
paintBoxDecorations(paintInfo, borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y()); | |
// 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 applyTransformToPaintInfo will modify the damage rect. | |
RenderObject::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. | |
applyTransformToPaintInfo(childPaintInfo, localToRepaintContainerTransform(parentOriginInContainer)); | |
SVGResourceFilter* filter = 0; | |
FloatRect boundingBox = repaintRectInLocalCoordinates(); | |
bool continueRendering = true; | |
if (childPaintInfo.phase == PaintPhaseForeground) | |
continueRendering = prepareToRenderSVGContent(this, childPaintInfo, boundingBox, filter); | |
if (continueRendering) | |
RenderBox::paint(childPaintInfo, 0, 0); | |
if (childPaintInfo.phase == PaintPhaseForeground) | |
finishRenderSVGContent(this, childPaintInfo, filter, paintInfo.context); | |
childPaintInfo.context->restore(); | |
if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE) | |
paintOutline(paintInfo.context, borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y(), width(), height(), style()); | |
} | |
void RenderSVGRoot::destroy() | |
{ | |
deregisterFromResources(this); | |
RenderBox::destroy(); | |
} | |
void RenderSVGRoot::calcViewport() | |
{ | |
SVGSVGElement* svg = static_cast<SVGSVGElement*>(node()); | |
if (!selfNeedsLayout() && !svg->hasRelativeValues()) | |
return; | |
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 computeContainerBoundingBox(this, false); | |
} | |
FloatRect RenderSVGRoot::repaintRectInLocalCoordinates() const | |
{ | |
// FIXME: This does not include the border but it should! | |
FloatRect repaintRect = computeContainerBoundingBox(this, true); | |
style()->svgStyle()->inflateForShadow(repaintRect); | |
return repaintRect; | |
} | |
AffineTransform RenderSVGRoot::localTransform() const | |
{ | |
return AffineTransform(); | |
} | |
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); | |
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) |