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/*
* Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
* Copyright (C) 2006 Apple Computer Inc.
* Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* 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
* along 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"
#include "SVGRootInlineBox.h"
#if ENABLE(SVG)
#include "GraphicsContext.h"
#include "RenderBlock.h"
#include "RenderSVGInlineText.h"
#include "SVGInlineFlowBox.h"
#include "SVGInlineTextBox.h"
#include "SVGRenderSupport.h"
#include "SVGTextPositioningElement.h"
namespace WebCore {
void SVGRootInlineBox::paint(PaintInfo& paintInfo, int, int)
{
ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection);
ASSERT(!paintInfo.context->paintingDisabled());
RenderObject* boxRenderer = renderer();
ASSERT(boxRenderer);
bool isPrinting = renderer()->document()->printing();
bool hasSelection = !isPrinting && selectionState() != RenderObject::SelectionNone;
PaintInfo childPaintInfo(paintInfo);
if (hasSelection) {
for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
if (child->isSVGInlineTextBox())
static_cast<SVGInlineTextBox*>(child)->paintSelectionBackground(childPaintInfo);
else if (child->isSVGInlineFlowBox())
static_cast<SVGInlineFlowBox*>(child)->paintSelectionBackground(childPaintInfo);
}
}
childPaintInfo.context->save();
if (SVGRenderSupport::prepareToRenderSVGContent(boxRenderer, childPaintInfo)) {
for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
if (child->isSVGInlineTextBox())
SVGInlineFlowBox::computeTextMatchMarkerRectForRenderer(toRenderSVGInlineText(static_cast<SVGInlineTextBox*>(child)->textRenderer()));
child->paint(childPaintInfo, 0, 0);
}
}
SVGRenderSupport::finishRenderSVGContent(boxRenderer, childPaintInfo, paintInfo.context);
childPaintInfo.context->restore();
}
void SVGRootInlineBox::computePerCharacterLayoutInformation()
{
// Perform SVG text layout phase two (see SVGTextLayoutEngine for details).
SVGTextLayoutEngine characterLayout;
layoutCharactersInTextBoxes(this, characterLayout);
// Perform SVG text layout phase three (see SVGTextChunkBuilder for details).
characterLayout.finishLayout();
// Perform SVG text layout phase four
// Position & resize all SVGInlineText/FlowBoxes in the inline box tree, resize the root box as well as the RenderSVGText parent block.
layoutChildBoxes(this);
layoutRootBox();
}
void SVGRootInlineBox::layoutCharactersInTextBoxes(InlineFlowBox* start, SVGTextLayoutEngine& characterLayout)
{
for (InlineBox* child = start->firstChild(); child; child = child->nextOnLine()) {
if (child->isSVGInlineTextBox()) {
ASSERT(child->renderer());
ASSERT(child->renderer()->isSVGInlineText());
SVGInlineTextBox* textBox = static_cast<SVGInlineTextBox*>(child);
characterLayout.layoutInlineTextBox(textBox);
} else {
ASSERT(child->isInlineFlowBox());
// Skip generated content.
Node* node = child->renderer()->node();
if (!node)
continue;
SVGInlineFlowBox* flowBox = static_cast<SVGInlineFlowBox*>(child);
bool isTextPath = node->hasTagName(SVGNames::textPathTag);
if (isTextPath) {
// Build text chunks for all <textPath> children, using the line layout algorithm.
// This is needeed as text-anchor is just an additional startOffset for text paths.
SVGTextLayoutEngine lineLayout;
layoutCharactersInTextBoxes(flowBox, lineLayout);
characterLayout.beginTextPathLayout(child->renderer(), lineLayout);
}
layoutCharactersInTextBoxes(flowBox, characterLayout);
if (isTextPath)
characterLayout.endTextPathLayout();
}
}
}
void SVGRootInlineBox::layoutChildBoxes(InlineFlowBox* start)
{
for (InlineBox* child = start->firstChild(); child; child = child->nextOnLine()) {
if (child->isSVGInlineTextBox()) {
ASSERT(child->renderer());
ASSERT(child->renderer()->isSVGInlineText());
SVGInlineTextBox* textBox = static_cast<SVGInlineTextBox*>(child);
IntRect boxRect = textBox->calculateBoundaries();
textBox->setX(boxRect.x());
textBox->setY(boxRect.y());
textBox->setLogicalWidth(boxRect.width());
textBox->setLogicalHeight(boxRect.height());
} else {
ASSERT(child->isInlineFlowBox());
// Skip generated content.
if (!child->renderer()->node())
continue;
SVGInlineFlowBox* flowBox = static_cast<SVGInlineFlowBox*>(child);
layoutChildBoxes(flowBox);
IntRect boxRect = flowBox->calculateBoundaries();
flowBox->setX(boxRect.x());
flowBox->setY(boxRect.y());
flowBox->setLogicalWidth(boxRect.width());
flowBox->setLogicalHeight(boxRect.height());
}
}
}
void SVGRootInlineBox::layoutRootBox()
{
RenderBlock* parentBlock = block();
ASSERT(parentBlock);
IntRect childRect;
for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
// Skip generated content.
if (!child->renderer()->node())
continue;
childRect.unite(child->calculateBoundaries());
}
int xBlock = childRect.x();
int yBlock = childRect.y();
int widthBlock = childRect.width();
int heightBlock = childRect.height();
// Finally, assign the root block position, now that all content is laid out.
parentBlock->setLocation(xBlock, yBlock);
parentBlock->setWidth(widthBlock);
parentBlock->setHeight(heightBlock);
// Position all children relative to the parent block.
for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
// Skip generated content.
if (!child->renderer()->node())
continue;
child->adjustPosition(-xBlock, -yBlock);
}
// Position ourselves.
setX(0);
setY(0);
setLogicalWidth(widthBlock);
setLogicalHeight(heightBlock);
setBlockLogicalHeight(heightBlock);
setLineTopBottomPositions(0, heightBlock);
}
InlineBox* SVGRootInlineBox::closestLeafChildForPosition(const IntPoint& point)
{
InlineBox* firstLeaf = firstLeafChild();
InlineBox* lastLeaf = lastLeafChild();
if (firstLeaf == lastLeaf)
return firstLeaf;
// FIXME: Check for vertical text!
InlineBox* closestLeaf = 0;
for (InlineBox* leaf = firstLeaf; leaf; leaf = leaf->nextLeafChild()) {
if (point.y() < leaf->m_y)
continue;
if (point.y() > leaf->m_y + leaf->virtualLogicalHeight())
continue;
closestLeaf = leaf;
if (point.x() < leaf->m_x + leaf->m_logicalWidth)
return leaf;
}
return closestLeaf ? closestLeaf : lastLeaf;
}
} // namespace WebCore
#endif // ENABLE(SVG)
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