| /* |
| * 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 "core/layout/LayoutFieldset.h" |
| |
| #include "core/CSSPropertyNames.h" |
| #include "core/HTMLNames.h" |
| #include "core/html/HTMLLegendElement.h" |
| #include "core/paint/FieldsetPainter.h" |
| |
| using namespace std; |
| |
| namespace blink { |
| |
| using namespace HTMLNames; |
| |
| LayoutFieldset::LayoutFieldset(Element* element) |
| : LayoutBlockFlow(element) |
| { |
| } |
| |
| void LayoutFieldset::computePreferredLogicalWidths() |
| { |
| LayoutBlockFlow::computePreferredLogicalWidths(); |
| if (LayoutBox* legend = findInFlowLegend()) { |
| 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()); |
| } |
| } |
| |
| LayoutObject* LayoutFieldset::layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope&) |
| { |
| LayoutBox* legend = findInFlowLegend(); |
| if (legend) { |
| LayoutRect oldLegendFrameRect = legend->frameRect(); |
| |
| if (relayoutChildren) |
| legend->setNeedsLayoutAndFullPaintInvalidation(LayoutInvalidationReason::FieldsetChanged); |
| 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); |
| |
| if (legend->frameRect() != oldLegendFrameRect) { |
| // We need to invalidate the fieldset border if the legend's frame changed. |
| setShouldDoFullPaintInvalidation(); |
| } |
| } |
| return legend; |
| } |
| |
| LayoutBox* LayoutFieldset::findInFlowLegend() const |
| { |
| for (LayoutObject* legend = firstChild(); legend; legend = legend->nextSibling()) { |
| if (legend->isFloatingOrOutOfFlowPositioned()) |
| continue; |
| |
| if (isHTMLLegendElement(legend->node())) { |
| if (legend->isBox()) |
| return toLayoutBox(legend); |
| } |
| } |
| return nullptr; |
| } |
| |
| void LayoutFieldset::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const |
| { |
| FieldsetPainter(*this).paintBoxDecorationBackground(paintInfo, paintOffset); |
| } |
| |
| void LayoutFieldset::paintMask(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const |
| { |
| FieldsetPainter(*this).paintMask(paintInfo, paintOffset); |
| } |
| |
| } // namespace blink |