1 /*

     2  * This file is part of the WebKit project.

     3  *

     4  * Copyright (C) 2006 Apple Computer, Inc.

     5  *

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

     7  * modify it under the terms of the GNU Library General Public

     8  * License as published by the Free Software Foundation; either

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

    10  *

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

    12  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    14  * Library General Public License for more details.

    15  *

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

    17  * along with this library; see the file COPYING.LIB.  If not, write to

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

    19  * Boston, MA 02110-1301, USA.

    20  *

    21  */

    22 

    23 #include "config.h"

    24 

    25 #if ENABLE(SVG) && ENABLE(SVG_EXPERIMENTAL_FEATURES)

    26 

    27 #include "RenderForeignObject.h"

    28 

    29 #include "GraphicsContext.h"

    30 #include "RenderView.h"

    31 #include "SVGForeignObjectElement.h"

    32 #include "SVGLength.h"

    33 

    34 namespace WebCore {

    35 

    36 RenderForeignObject::RenderForeignObject(SVGForeignObjectElement* node) 

    37     : RenderSVGBlock(node)

    38 {

    39 }

    40 

    41 AffineTransform RenderForeignObject::translationForAttributes()

    42 {

    43     SVGForeignObjectElement* foreign = static_cast<SVGForeignObjectElement*>(element());

    44     return AffineTransform().translate(foreign->x().value(), foreign->y().value());

    45 }

    46 

    47 void RenderForeignObject::paint(PaintInfo& paintInfo, int parentX, int parentY)

    48 {

    49     if (paintInfo.context->paintingDisabled())

    50         return;

    51 

    52     paintInfo.context->save();

    53     paintInfo.context->concatCTM(AffineTransform().translate(parentX, parentY));

    54     paintInfo.context->concatCTM(localTransform());

    55     paintInfo.context->concatCTM(translationForAttributes());

    56     paintInfo.context->clip(getClipRect(parentX, parentY));

    57 

    58     float opacity = style()->opacity();

    59     if (opacity < 1.0f)

    60         // FIXME: Possible optimization by clipping to bbox here, once relativeBBox is implemented & clip, mask and filter support added.

    61         paintInfo.context->beginTransparencyLayer(opacity);

    62 

    63     PaintInfo pi(paintInfo);

    64     pi.rect = absoluteTransform().inverse().mapRect(paintInfo.rect);

    65     RenderBlock::paint(pi, 0, 0);

    66 

    67     if (opacity < 1.0f)

    68         paintInfo.context->endTransparencyLayer();

    69 

    70     paintInfo.context->restore();

    71 }

    72 

    73 void RenderForeignObject::computeAbsoluteRepaintRect(IntRect& r, bool f)

    74 {

    75     AffineTransform transform = translationForAttributes() * localTransform();

    76     r = transform.mapRect(r);

    77 

    78     RenderBlock::computeAbsoluteRepaintRect(r, f);

    79 }

    80 

    81 bool RenderForeignObject::requiresLayer()

    82 {

    83     return false;

    84 }

    85 

    86 void RenderForeignObject::layout()

    87 {

    88     ASSERT(needsLayout());

    89 

    90     // Arbitrary affine transforms are incompatible with LayoutState.

    91     view()->disableLayoutState();

    92 

    93     IntRect oldBounds;

    94     IntRect oldOutlineBox;

    95     bool checkForRepaint = checkForRepaintDuringLayout();

    96     if (checkForRepaint) {

    97         oldBounds = m_absoluteBounds;

    98         oldOutlineBox = absoluteOutlineBox();

    99     }

   100 

   101     RenderBlock::layout();

   102 

   103     m_absoluteBounds = absoluteClippedOverflowRect();

   104 

   105     if (checkForRepaint)

   106         repaintAfterLayoutIfNeeded(oldBounds, oldOutlineBox);

   107 

   108     view()->enableLayoutState();

   109     setNeedsLayout(false);

   110 }

   111 

   112 bool RenderForeignObject::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction hitTestAction)

   113 {

   114     AffineTransform totalTransform = absoluteTransform();

   115     totalTransform *= translationForAttributes();

   116     double localX, localY;

   117     totalTransform.inverse().map(x, y, &localX, &localY);

   118     return RenderBlock::nodeAtPoint(request, result, static_cast<int>(localX), static_cast<int>(localY), tx, ty, hitTestAction);

   119 }

   120 

   121 } // namespace WebCore

   122 

   123 #endif // ENABLE(SVG)