1 /*

     2     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>

     3                   2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>

     4                   2007 Eric Seidel <eric@webkit.org>

     5     Copyright (C) 2009 Google, Inc.  All rights reserved.

     6                   2009 Dirk Schulze <krit@webkit.org>

     7 

     8     This library is free software; you can redistribute it and/or

     9     modify it under the terms of the GNU Library General Public

    10     License as published by the Free Software Foundation; either

    11     version 2 of the License, or (at your option) any later version.

    12 

    13     This library is distributed in the hope that it will be useful,

    14     but WITHOUT ANY WARRANTY; without even the implied warranty of

    15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    16     Library General Public License for more details.

    17 

    18     You should have received a copy of the GNU Library General Public License

    19     aint with this library; see the file COPYING.LIB.  If not, write to

    20     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    21     Boston, MA 02110-1301, USA.

    22 */

    23 

    24 #include "config.h"

    25 

    26 #if ENABLE(SVG)

    27 #include "RenderSVGContainer.h"

    28 

    29 #include "GraphicsContext.h"

    30 #include "RenderSVGResourceFilter.h"

    31 #include "RenderView.h"

    32 #include "SVGRenderSupport.h"

    33 #include "SVGStyledElement.h"

    34 

    35 namespace WebCore {

    36 

    37 RenderSVGContainer::RenderSVGContainer(SVGStyledElement* node)

    38     : RenderSVGModelObject(node)

    39     , m_drawsContents(true)

    40 {

    41 }

    42 

    43 void RenderSVGContainer::layout()

    44 {

    45     ASSERT(needsLayout());

    46 

    47     // RenderSVGRoot disables layoutState for the SVG rendering tree.

    48     ASSERT(!view()->layoutStateEnabled());

    49 

    50     // Allow RenderSVGViewportContainer to update its viewport.

    51     calcViewport();

    52 

    53     LayoutRepainter repainter(*this, m_everHadLayout && checkForRepaintDuringLayout());

    54 

    55     // Allow RenderSVGTransformableContainer to update its transform.

    56     calculateLocalTransform();

    57 

    58     SVGRenderSupport::layoutChildren(this, selfNeedsLayout());

    59 

    60     // Invalidate all resources of this client, if we changed something.

    61     if (m_everHadLayout && selfNeedsLayout())

    62         RenderSVGResource::invalidateAllResourcesOfRenderer(this);

    63 

    64     repainter.repaintAfterLayout();

    65     setNeedsLayout(false);

    66 }

    67 

    68 bool RenderSVGContainer::selfWillPaint() const

    69 {

    70 #if ENABLE(FILTERS)

    71     const SVGRenderStyle* svgStyle = style()->svgStyle();

    72     RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(document(), svgStyle->filterResource());

    73     if (filter)

    74         return true;

    75 #endif

    76     return false;

    77 }

    78 

    79 void RenderSVGContainer::paint(PaintInfo& paintInfo, int, int)

    80 {

    81     if (paintInfo.context->paintingDisabled() || !drawsContents())

    82         return;

    83 

    84     // Spec: groups w/o children still may render filter content.

    85     if (!firstChild() && !selfWillPaint())

    86         return;

    87 

    88     PaintInfo childPaintInfo(paintInfo);

    89     childPaintInfo.context->save();

    90 

    91     // Let the RenderSVGViewportContainer subclass clip if necessary

    92     applyViewportClip(childPaintInfo);

    93 

    94     childPaintInfo.applyTransform(localToParentTransform());

    95 

    96     bool continueRendering = true;

    97     if (childPaintInfo.phase == PaintPhaseForeground)

    98         continueRendering = SVGRenderSupport::prepareToRenderSVGContent(this, childPaintInfo);

    99 

   100     if (continueRendering) {

   101         childPaintInfo.updatePaintingRootForChildren(this);

   102         for (RenderObject* child = firstChild(); child; child = child->nextSibling())

   103             child->paint(childPaintInfo, 0, 0);

   104     }

   105 

   106     if (paintInfo.phase == PaintPhaseForeground)

   107         SVGRenderSupport::finishRenderSVGContent(this, childPaintInfo, paintInfo.context);

   108 

   109     childPaintInfo.context->restore();

   110 

   111     // FIXME: This really should be drawn from local coordinates, but currently we hack it

   112     // to avoid our clip killing our outline rect.  Thus we translate our

   113     // outline rect into parent coords before drawing.

   114     // FIXME: This means our focus ring won't share our rotation like it should.

   115     // We should instead disable our clip during PaintPhaseOutline

   116     if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE) {

   117         IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRectInLocalCoordinates()));

   118         paintOutline(paintInfo.context, paintRectInParent.x(), paintRectInParent.y(), paintRectInParent.width(), paintRectInParent.height());

   119     }

   120 }

   121 

   122 // addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call

   123 void RenderSVGContainer::addFocusRingRects(Vector<IntRect>& rects, int, int)

   124 {

   125     IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRectInLocalCoordinates()));

   126     if (!paintRectInParent.isEmpty())

   127         rects.append(paintRectInParent);

   128 }

   129 

   130 FloatRect RenderSVGContainer::objectBoundingBox() const

   131 {

   132     return SVGRenderSupport::computeContainerBoundingBox(this, SVGRenderSupport::ObjectBoundingBox);

   133 }

   134 

   135 FloatRect RenderSVGContainer::strokeBoundingBox() const

   136 {

   137     return SVGRenderSupport::computeContainerBoundingBox(this, SVGRenderSupport::StrokeBoundingBox);

   138 }

   139 

   140 FloatRect RenderSVGContainer::repaintRectInLocalCoordinates() const

   141 {

   142     FloatRect repaintRect = SVGRenderSupport::computeContainerBoundingBox(this, SVGRenderSupport::RepaintBoundingBox);

   143     SVGRenderSupport::intersectRepaintRectWithResources(this, repaintRect);

   144     return repaintRect;

   145 }

   146 

   147 bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)

   148 {

   149     // Give RenderSVGViewportContainer a chance to apply its viewport clip

   150     if (!pointIsInsideViewportClip(pointInParent))

   151         return false;

   152 

   153     FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);

   154 

   155     if (!SVGRenderSupport::pointInClippingArea(this, localPoint))

   156         return false;

   157                 

   158     for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {

   159         if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {

   160             updateHitTestResult(result, roundedIntPoint(localPoint));

   161             return true;

   162         }

   163     }

   164 

   165     // Spec: Only graphical elements can be targeted by the mouse, period.

   166     // 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."

   167     return false;

   168 }

   169 

   170 }

   171 

   172 #endif // ENABLE(SVG)