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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 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 "HTMLFieldSetElement.h"
#include "HTMLNames.h"
#include "PaintInfo.h"
namespace WebCore {
using namespace HTMLNames;
RenderFieldset::RenderFieldset(HTMLFieldSetElement& element, Ref<RenderStyle>&& style)
: RenderBlockFlow(element, WTFMove(style))
{
}
void RenderFieldset::computePreferredLogicalWidths()
{
RenderBlockFlow::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 = std::max(m_minPreferredLogicalWidth, legendMinWidth + horizontalBorderAndPaddingExtent());
}
}
RenderObject* RenderFieldset::layoutSpecialExcludedChild(bool relayoutChildren)
{
RenderBox* box = findLegend();
if (!box)
return nullptr;
RenderBox& legend = *box;
if (relayoutChildren)
legend.setNeedsLayout();
legend.layoutIfNeeded();
LayoutUnit 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).
LayoutUnit centeredWidth = logicalWidth() - logicalWidthForChild(legend);
logicalLeft = centeredWidth - centeredWidth / 2;
break;
}
default:
logicalLeft = logicalWidth() - borderStart() - paddingStart() - marginStartForChild(legend) - logicalWidthForChild(legend);
break;
}
}
setLogicalLeftForChild(legend, logicalLeft);
LayoutUnit fieldsetBorderBefore = borderBefore();
LayoutUnit legendLogicalHeight = logicalHeightForChild(legend);
LayoutUnit legendLogicalTop;
LayoutUnit collapsedLegendExtent;
// FIXME: We need to account for the legend's margin before too.
if (fieldsetBorderBefore > legendLogicalHeight) {
// The <legend> is smaller than the associated fieldset before border
// so the latter determines positioning of the <legend>. The sizing depends
// on the legend's margins as we want to still follow the author's cues.
// Firefox completely ignores the margins in this case which seems wrong.
legendLogicalTop = (fieldsetBorderBefore - legendLogicalHeight) / 2;
collapsedLegendExtent = std::max<LayoutUnit>(fieldsetBorderBefore, legendLogicalTop + legendLogicalHeight + marginAfterForChild(legend));
} else
collapsedLegendExtent = legendLogicalHeight + marginAfterForChild(legend);
setLogicalTopForChild(legend, legendLogicalTop);
setLogicalHeight(paddingBefore() + collapsedLegendExtent);
return &legend;
}
RenderBox* RenderFieldset::findLegend(FindLegendOption option) const
{
for (RenderObject* legend = firstChild(); legend; legend = legend->nextSibling()) {
if (option == IgnoreFloatingOrOutOfFlow && legend->isFloatingOrOutOfFlowPositioned())
continue;
if (is<HTMLLegendElement>(legend->node()))
return downcast<RenderBox>(legend);
}
return nullptr;
}
void RenderFieldset::paintBoxDecorations(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (!paintInfo.shouldPaintWithinRoot(*this))
return;
LayoutRect paintRect(paintOffset, size());
RenderBox* legend = findLegend();
if (!legend)
return RenderBlockFlow::paintBoxDecorations(paintInfo, paintOffset);
// 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()) {
LayoutUnit yOff = (legend->y() > 0) ? LayoutUnit() : (legend->height() - borderTop()) / 2;
paintRect.setHeight(paintRect.height() - yOff);
paintRect.setY(paintRect.y() + yOff);
} else {
LayoutUnit xOff = (legend->x() > 0) ? LayoutUnit() : (legend->width() - borderLeft()) / 2;
paintRect.setWidth(paintRect.width() - xOff);
paintRect.setX(paintRect.x() + xOff);
}
if (!boxShadowShouldBeAppliedToBackground(paintRect.location(), determineBackgroundBleedAvoidance(paintInfo.context())))
paintBoxShadow(paintInfo, paintRect, style(), Normal);
paintFillLayers(paintInfo, style().visitedDependentColor(CSSPropertyBackgroundColor), style().backgroundLayers(), paintRect);
paintBoxShadow(paintInfo, paintRect, 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
LayoutRect clipRect;
if (style().isHorizontalWritingMode()) {
clipRect.setX(paintRect.x() + legend->x());
clipRect.setY(paintRect.y());
clipRect.setWidth(legend->width());
clipRect.setHeight(std::max<LayoutUnit>(style().borderTopWidth(), legend->height() - ((legend->height() - borderTop()) / 2)));
} else {
clipRect.setX(paintRect.x());
clipRect.setY(paintRect.y() + legend->y());
clipRect.setWidth(std::max<LayoutUnit>(style().borderLeftWidth(), legend->width()));
clipRect.setHeight(legend->height());
}
graphicsContext.clipOut(snapRectToDevicePixels(clipRect, document().deviceScaleFactor()));
paintBorder(paintInfo, paintRect, style());
}
void RenderFieldset::paintMask(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (style().visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
return;
LayoutRect paintRect = LayoutRect(paintOffset, size());
RenderBox* legend = findLegend();
if (!legend)
return RenderBlockFlow::paintMask(paintInfo, paintOffset);
// 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()) {
LayoutUnit yOff = (legend->y() > 0) ? LayoutUnit() : (legend->height() - borderTop()) / 2;
paintRect.expand(0, -yOff);
paintRect.move(0, yOff);
} else {
LayoutUnit xOff = (legend->x() > 0) ? LayoutUnit() : (legend->width() - borderLeft()) / 2;
paintRect.expand(-xOff, 0);
paintRect.move(xOff, 0);
}
paintMaskImages(paintInfo, paintRect);
}
} // namespace WebCore
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