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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006 Apple Computer, 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
* 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 "RenderFieldset.h"
#include "CSSPropertyNames.h"
#include "GraphicsContext.h"
#include "HTMLNames.h"
#include "PaintInfo.h"
using std::min;
using std::max;
namespace WebCore {
using namespace HTMLNames;
RenderFieldset::RenderFieldset(Node* element)
: RenderBlock(element)
{
}
void RenderFieldset::computePreferredLogicalWidths()
{
RenderBlock::computePreferredLogicalWidths();
if (RenderBox* legend = findLegend()) {
int legendMinWidth = legend->minPreferredLogicalWidth();
Length legendMarginLeft = legend->style()->marginLeft();
Length legendMarginRight = legend->style()->marginLeft();
if (legendMarginLeft.isFixed())
legendMinWidth += legendMarginLeft.value();
if (legendMarginRight.isFixed())
legendMinWidth += legendMarginRight.value();
m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, legendMinWidth + borderAndPaddingWidth());
}
}
RenderObject* RenderFieldset::layoutSpecialExcludedChild(bool relayoutChildren)
{
RenderBox* legend = findLegend();
if (legend) {
if (relayoutChildren)
legend->setNeedsLayout(true);
legend->layoutIfNeeded();
int logicalLeft;
if (style()->isLeftToRightDirection()) {
switch (legend->style()->textAlign()) {
case CENTER:
logicalLeft = (logicalWidth() - logicalWidthForChild(legend)) / 2;
break;
case RIGHT:
logicalLeft = logicalWidth() - borderEnd() - paddingEnd() - logicalWidthForChild(legend);
break;
default:
logicalLeft = borderStart() + paddingStart() + marginStartForChild(legend);
break;
}
} else {
switch (legend->style()->textAlign()) {
case LEFT:
logicalLeft = borderStart() + paddingStart();
break;
case CENTER: {
// Make sure that the extra pixel goes to the end side in RTL (since it went to the end side
// in LTR).
int centeredWidth = logicalWidth() - logicalWidthForChild(legend);
logicalLeft = centeredWidth - centeredWidth / 2;
break;
}
default:
logicalLeft = logicalWidth() - borderStart() - paddingStart() - marginStartForChild(legend) - logicalWidthForChild(legend);
break;
}
}
setLogicalLeftForChild(legend, logicalLeft);
int b = borderBefore();
int h = logicalHeightForChild(legend);
setLogicalTopForChild(legend, max((b - h) / 2, 0));
setLogicalHeight(max(b, h) + paddingBefore());
}
return legend;
}
RenderBox* RenderFieldset::findLegend() const
{
for (RenderObject* legend = firstChild(); legend; legend = legend->nextSibling()) {
if (!legend->isFloatingOrPositioned() && legend->node() && (legend->node()->hasTagName(legendTag)))
return toRenderBox(legend);
}
return 0;
}
void RenderFieldset::paintBoxDecorations(PaintInfo& paintInfo, int tx, int ty)
{
if (!paintInfo.shouldPaintWithinRoot(this))
return;
int w = width();
int h = height();
RenderBox* legend = findLegend();
if (!legend)
return RenderBlock::paintBoxDecorations(paintInfo, tx, ty);
// FIXME: We need to work with "rl" and "bt" block flow directions. In those
// cases the legend is embedded in the right and bottom borders respectively.
// https://bugs.webkit.org/show_bug.cgi?id=47236
if (style()->isHorizontalWritingMode()) {
int yOff = (legend->y() > 0) ? 0 : (legend->height() - borderTop()) / 2;
h -= yOff;
ty += yOff;
} else {
int xOff = (legend->x() > 0) ? 0 : (legend->width() - borderLeft()) / 2;
w -= xOff;
tx += xOff;
}
paintBoxShadow(paintInfo.context, tx, ty, w, h, style(), Normal);
paintFillLayers(paintInfo, style()->visitedDependentColor(CSSPropertyBackgroundColor), style()->backgroundLayers(), tx, ty, w, h);
paintBoxShadow(paintInfo.context, tx, ty, w, h, style(), Inset);
if (!style()->hasBorder())
return;
// Create a clipping region around the legend and paint the border as normal
GraphicsContext* graphicsContext = paintInfo.context;
GraphicsContextStateSaver stateSaver(*graphicsContext);
// FIXME: We need to work with "rl" and "bt" block flow directions. In those
// cases the legend is embedded in the right and bottom borders respectively.
// https://bugs.webkit.org/show_bug.cgi?id=47236
if (style()->isHorizontalWritingMode()) {
int clipTop = ty;
int clipHeight = max(static_cast<int>(style()->borderTopWidth()), legend->height());
graphicsContext->clipOut(IntRect(tx + legend->x(), clipTop, legend->width(), clipHeight));
} else {
int clipLeft = tx;
int clipWidth = max(static_cast<int>(style()->borderLeftWidth()), legend->width());
graphicsContext->clipOut(IntRect(clipLeft, ty + legend->y(), clipWidth, legend->height()));
}
paintBorder(paintInfo.context, tx, ty, w, h, style());
}
void RenderFieldset::paintMask(PaintInfo& paintInfo, int tx, int ty)
{
if (style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
return;
int w = width();
int h = height();
RenderBox* legend = findLegend();
if (!legend)
return RenderBlock::paintMask(paintInfo, tx, ty);
// FIXME: We need to work with "rl" and "bt" block flow directions. In those
// cases the legend is embedded in the right and bottom borders respectively.
// https://bugs.webkit.org/show_bug.cgi?id=47236
if (style()->isHorizontalWritingMode()) {
int yOff = (legend->y() > 0) ? 0 : (legend->height() - borderTop()) / 2;
h -= yOff;
ty += yOff;
} else {
int xOff = (legend->x() > 0) ? 0 : (legend->width() - borderLeft()) / 2;
w -= xOff;
tx += xOff;
}
paintMaskImages(paintInfo, tx, ty, w, h);
}
} // namespace WebCore
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