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      1 /*
      2  * Copyright (C) 2006 Oliver Hunt <ojh16 (at) student.canterbury.ac.nz>
      3  * Copyright (C) 2006 Apple Computer Inc.
      4  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      5  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  */
     22 
     23 #include "config.h"
     24 #include "SVGInlineFlowBox.h"
     25 
     26 #if ENABLE(SVG)
     27 #include "DocumentMarkerController.h"
     28 #include "GraphicsContext.h"
     29 #include "RenderSVGInlineText.h"
     30 #include "SVGInlineTextBox.h"
     31 #include "SVGRenderSupport.h"
     32 
     33 using namespace std;
     34 
     35 namespace WebCore {
     36 
     37 void SVGInlineFlowBox::paintSelectionBackground(PaintInfo& paintInfo)
     38 {
     39     ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection);
     40     ASSERT(!paintInfo.context->paintingDisabled());
     41 
     42     PaintInfo childPaintInfo(paintInfo);
     43     for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
     44         if (child->isSVGInlineTextBox())
     45             static_cast<SVGInlineTextBox*>(child)->paintSelectionBackground(childPaintInfo);
     46         else if (child->isSVGInlineFlowBox())
     47             static_cast<SVGInlineFlowBox*>(child)->paintSelectionBackground(childPaintInfo);
     48     }
     49 }
     50 
     51 void SVGInlineFlowBox::paint(PaintInfo& paintInfo, int, int, int, int)
     52 {
     53     ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection);
     54     ASSERT(!paintInfo.context->paintingDisabled());
     55 
     56     RenderObject* boxRenderer = renderer();
     57     ASSERT(boxRenderer);
     58 
     59     PaintInfo childPaintInfo(paintInfo);
     60     childPaintInfo.context->save();
     61 
     62     if (SVGRenderSupport::prepareToRenderSVGContent(boxRenderer, childPaintInfo)) {
     63         for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
     64             if (child->isSVGInlineTextBox())
     65                 computeTextMatchMarkerRectForRenderer(toRenderSVGInlineText(static_cast<SVGInlineTextBox*>(child)->textRenderer()));
     66 
     67             child->paint(childPaintInfo, 0, 0, 0, 0);
     68         }
     69     }
     70 
     71     SVGRenderSupport::finishRenderSVGContent(boxRenderer, childPaintInfo, paintInfo.context);
     72     childPaintInfo.context->restore();
     73 }
     74 
     75 IntRect SVGInlineFlowBox::calculateBoundaries() const
     76 {
     77     IntRect childRect;
     78     for (InlineBox* child = firstChild(); child; child = child->nextOnLine())
     79         childRect.unite(child->calculateBoundaries());
     80     return childRect;
     81 }
     82 
     83 void SVGInlineFlowBox::computeTextMatchMarkerRectForRenderer(RenderSVGInlineText* textRenderer)
     84 {
     85     ASSERT(textRenderer);
     86 
     87     Node* node = textRenderer->node();
     88     if (!node || !node->inDocument())
     89         return;
     90 
     91     RenderStyle* style = textRenderer->style();
     92     ASSERT(style);
     93 
     94     AffineTransform fragmentTransform;
     95     Document* document = textRenderer->document();
     96     Vector<DocumentMarker> markers = document->markers()->markersForNode(textRenderer->node());
     97 
     98     Vector<DocumentMarker>::iterator markerEnd = markers.end();
     99     for (Vector<DocumentMarker>::iterator markerIt = markers.begin(); markerIt != markerEnd; ++markerIt) {
    100         const DocumentMarker& marker = *markerIt;
    101 
    102         // SVG is only interessted in the TextMatch marker, for now.
    103         if (marker.type != DocumentMarker::TextMatch)
    104             continue;
    105 
    106         FloatRect markerRect;
    107         for (InlineTextBox* box = textRenderer->firstTextBox(); box; box = box->nextTextBox()) {
    108             if (!box->isSVGInlineTextBox())
    109                 continue;
    110 
    111             SVGInlineTextBox* textBox = static_cast<SVGInlineTextBox*>(box);
    112 
    113             int markerStartPosition = max<int>(marker.startOffset - textBox->start(), 0);
    114             int markerEndPosition = min<int>(marker.endOffset - textBox->start(), textBox->len());
    115 
    116             if (markerStartPosition >= markerEndPosition)
    117                 continue;
    118 
    119             int fragmentStartPosition = 0;
    120             int fragmentEndPosition = 0;
    121 
    122             const Vector<SVGTextFragment>& fragments = textBox->textFragments();
    123             unsigned textFragmentsSize = fragments.size();
    124             for (unsigned i = 0; i < textFragmentsSize; ++i) {
    125                 const SVGTextFragment& fragment = fragments.at(i);
    126 
    127                 fragmentStartPosition = markerStartPosition;
    128                 fragmentEndPosition = markerEndPosition;
    129                 if (!textBox->mapStartEndPositionsIntoFragmentCoordinates(fragment, fragmentStartPosition, fragmentEndPosition))
    130                     continue;
    131 
    132                 FloatRect fragmentRect = textBox->selectionRectForTextFragment(fragment, fragmentStartPosition, fragmentEndPosition, style);
    133                 fragment.buildFragmentTransform(fragmentTransform);
    134                 if (!fragmentTransform.isIdentity())
    135                     fragmentRect = fragmentTransform.mapRect(fragmentRect);
    136 
    137                 markerRect.unite(fragmentRect);
    138             }
    139         }
    140 
    141         document->markers()->setRenderedRectForMarker(node, marker, textRenderer->localToAbsoluteQuad(markerRect).enclosingBoundingBox());
    142     }
    143 }
    144 
    145 } // namespace WebCore
    146 
    147 #endif // ENABLE(SVG)
    148