| /* |
| * 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 "core/rendering/RenderFieldset.h" |
| |
| #include "CSSPropertyNames.h" |
| #include "HTMLNames.h" |
| #include "core/platform/graphics/GraphicsContextStateSaver.h" |
| #include "core/rendering/PaintInfo.h" |
| |
| using std::min; |
| using std::max; |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| RenderFieldset::RenderFieldset(Element* element) |
| : RenderBlockFlow(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, SubtreeLayoutScope&) |
| { |
| RenderBox* legend = findLegend(); |
| if (legend) { |
| 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 = 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 (legend->node() && (legend->node()->hasTagName(legendTag))) |
| return toRenderBox(legend); |
| } |
| return 0; |
| } |
| |
| void RenderFieldset::paintBoxDecorations(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| if (!paintInfo.shouldPaintWithinRoot(this)) |
| return; |
| |
| LayoutRect paintRect(paintOffset, size()); |
| RenderBox* legend = findLegend(); |
| if (!legend) |
| return RenderBlock::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(determineBackgroundBleedAvoidance(paintInfo.context))) |
| paintBoxShadow(paintInfo, paintRect, style(), Normal); |
| paintFillLayers(paintInfo, resolveColor(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 |
| if (style()->isHorizontalWritingMode()) { |
| LayoutUnit clipTop = paintRect.y(); |
| LayoutUnit clipHeight = max(static_cast<LayoutUnit>(style()->borderTopWidth()), legend->height() - ((legend->height() - borderTop()) / 2)); |
| graphicsContext->clipOut(pixelSnappedIntRect(paintRect.x() + legend->x(), clipTop, legend->width(), clipHeight)); |
| } else { |
| LayoutUnit clipLeft = paintRect.x(); |
| LayoutUnit clipWidth = max(static_cast<LayoutUnit>(style()->borderLeftWidth()), legend->width()); |
| graphicsContext->clipOut(pixelSnappedIntRect(clipLeft, paintRect.y() + legend->y(), clipWidth, legend->height())); |
| } |
| |
| 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 RenderBlock::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 |
