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-rw-r--r--Source/WebCore/mathml/RenderMathMLUnderOver.cpp299
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diff --git a/Source/WebCore/mathml/RenderMathMLUnderOver.cpp b/Source/WebCore/mathml/RenderMathMLUnderOver.cpp
deleted file mode 100644
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--- a/Source/WebCore/mathml/RenderMathMLUnderOver.cpp
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@@ -1,299 +0,0 @@
-/*
- * Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-
-#if ENABLE(MATHML)
-
-#include "RenderMathMLUnderOver.h"
-
-#include "FontSelector.h"
-#include "MathMLNames.h"
-
-namespace WebCore {
-
-using namespace MathMLNames;
-
-static const double gOverSpacingAdjustment = 0.5;
-
-RenderMathMLUnderOver::RenderMathMLUnderOver(Node* expression)
- : RenderMathMLBlock(expression)
-{
- Element* element = static_cast<Element*>(expression);
- // Determine what kind of under/over expression we have by element name
-
- if (element->hasLocalName(MathMLNames::munderTag))
- m_kind = Under;
- else if (element->hasLocalName(MathMLNames::moverTag))
- m_kind = Over;
- else if (element->hasLocalName(MathMLNames::munderoverTag))
- m_kind = UnderOver;
- else
- m_kind = Under;
-
-}
-
-void RenderMathMLUnderOver::addChild(RenderObject* child, RenderObject* beforeChild)
-{
- RenderMathMLBlock* row = new (renderArena()) RenderMathMLBlock(node());
- RefPtr<RenderStyle> rowStyle = makeBlockStyle();
- row->setStyle(rowStyle.release());
-
- // look through the children for rendered elements counting the blocks so we know what child
- // we are adding
- int blocks = 0;
- RenderObject* current = this->firstChild();
- while (current) {
- blocks++;
- current = current->nextSibling();
- }
-
- switch (blocks) {
- case 0:
- // this is the base so just append it
- RenderBlock::addChild(row, beforeChild);
- break;
- case 1:
- // the under or over
- // FIXME: text-align: center does not work
- row->style()->setTextAlign(CENTER);
- if (m_kind == Over) {
- // add the over as first
- RenderBlock::addChild(row, firstChild());
- } else {
- // add the under as last
- RenderBlock::addChild(row, beforeChild);
- }
- break;
- case 2:
- // the under or over
- // FIXME: text-align: center does not work
- row->style()->setTextAlign(CENTER);
- if (m_kind == UnderOver) {
- // add the over as first
- RenderBlock::addChild(row, firstChild());
- } else {
- // we really shouldn't get here as only munderover should have three children
- RenderBlock::addChild(row, beforeChild);
- }
- break;
- default:
- // munderover shouldn't have more than three children. In theory we shouldn't
- // get here if the MathML is correctly formed, but that isn't a guarantee.
- // We will treat this as another under element and they'll get something funky.
- RenderBlock::addChild(row, beforeChild);
- }
- row->addChild(child);
-}
-
-inline int getOffsetHeight(RenderObject* obj)
-{
- if (obj->isBoxModelObject()) {
- RenderBoxModelObject* box = toRenderBoxModelObject(obj);
- return box->offsetHeight();
- }
-
- return 0;
-}
-
-void RenderMathMLUnderOver::stretchToHeight(int height)
-{
-
- RenderObject* base = firstChild();
- if (!base)
- return;
-
- // For over or underover, the base is the sibling of the first child
- if (m_kind != Under)
- base = base->nextSibling();
-
- if (!base)
- return;
-
- // use the child of the row which is the actual base
- base = base->firstChild();
-
- if (base && base->isRenderMathMLBlock()) {
- RenderMathMLBlock* block = toRenderMathMLBlock(base);
- block->stretchToHeight(height);
- setNeedsLayout(true);
- }
-}
-
-void RenderMathMLUnderOver::layout()
-{
- RenderBlock::layout();
- RenderObject* over = 0;
- RenderObject* base = 0;
- switch (m_kind) {
- case Over:
- // We need to calculate the baseline over the over versus the start of the base and
- // adjust the placement of the base.
- over = firstChild();
- if (over) {
- // FIXME: descending glyphs intrude into base (e.g. lowercase y over base)
- // FIXME: bases that ascend higher than the line box intrude into the over
- if (!over->firstChild()->isBoxModelObject())
- break;
-
- int overSpacing = static_cast<int>(gOverSpacingAdjustment * (getOffsetHeight(over) - toRenderBoxModelObject(over->firstChild())->baselinePosition(AlphabeticBaseline, true, HorizontalLine)));
-
- // base row wrapper
- base = over->nextSibling();
- if (base) {
- if (overSpacing > 0)
- base->style()->setMarginTop(Length(-overSpacing, Fixed));
- else
- base->style()->setMarginTop(Length(0, Fixed));
- }
-
- }
- break;
- case Under:
- // FIXME: Non-ascending glyphs in the under should be moved closer to the base
-
- // We need to calculate the baseline of the base versus the start of the under block and
- // adjust the placement of the under block.
-
- // base row wrapper
- base = firstChild();
- if (base) {
- int baseHeight = getOffsetHeight(base);
- // actual base
- base = base->firstChild();
- if (!base->isBoxModelObject())
- break;
-
- // FIXME: We need to look at the space between a single maximum height of
- // the line boxes and the baseline and squeeze them together
- int underSpacing = baseHeight - toRenderBoxModelObject(base)->baselinePosition(AlphabeticBaseline, true, HorizontalLine);
-
- // adjust the base's intrusion into the under
- RenderObject* under = lastChild();
- if (under && underSpacing > 0)
- under->style()->setMarginTop(Length(-underSpacing, Fixed));
- }
- break;
- case UnderOver:
- // FIXME: Non-descending glyphs in the over should be moved closer to the base
- // FIXME: Non-ascending glyphs in the under should be moved closer to the base
-
- // We need to calculate the baseline of the over versus the start of the base and
- // adjust the placement of the base.
-
- over = firstChild();
- if (over) {
- // FIXME: descending glyphs intrude into base (e.g. lowercase y over base)
- // FIXME: bases that ascend higher than the line box intrude into the over
- if (!over->firstChild()->isBoxModelObject())
- break;
- int overSpacing = static_cast<int>(gOverSpacingAdjustment * (getOffsetHeight(over) - toRenderBoxModelObject(over->firstChild())->baselinePosition(AlphabeticBaseline, true, HorizontalLine)));
-
- // base row wrapper
- base = over->nextSibling();
-
- if (base) {
- if (overSpacing > 0)
- base->style()->setMarginTop(Length(-overSpacing, Fixed));
-
- // We need to calculate the baseline of the base versus the start of the under block and
- // adjust the placement of the under block.
-
- int baseHeight = getOffsetHeight(base);
- // actual base
- base = base->firstChild();
- if (!base->isBoxModelObject())
- break;
-
- // FIXME: We need to look at the space between a single maximum height of
- // the line boxes and the baseline and squeeze them together
- int underSpacing = baseHeight - toRenderBoxModelObject(base)->baselinePosition(AlphabeticBaseline, true, HorizontalLine);
-
- RenderObject* under = lastChild();
- if (under && under->firstChild()->isRenderInline() && underSpacing > 0)
- under->style()->setMarginTop(Length(-underSpacing, Fixed));
-
- }
- }
- break;
- }
- setNeedsLayout(true);
- RenderBlock::layout();
-}
-
-int RenderMathMLUnderOver::baselinePosition(FontBaseline, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
-{
- RenderObject* current = firstChild();
- if (!current)
- return RenderBlock::baselinePosition(AlphabeticBaseline, firstLine, direction, linePositionMode);
-
- int baseline = 0;
- switch (m_kind) {
- case UnderOver:
- case Over:
- baseline += getOffsetHeight(current);
- current = current->nextSibling();
- if (current) {
- // actual base
- RenderObject* base = current->firstChild();
- if (!base || !base->isBoxModelObject())
- break;
- baseline += toRenderBoxModelObject(base)->baselinePosition(AlphabeticBaseline, firstLine, HorizontalLine, linePositionMode);
- // added the negative top margin
- baseline += current->style()->marginTop().value();
- }
- break;
- case Under:
- RenderObject* base = current->firstChild();
- if (base && base->isBoxModelObject())
- baseline += toRenderBoxModelObject(base)->baselinePosition(AlphabeticBaseline, true, HorizontalLine);
- }
-
- // FIXME: Where is the extra 2-3px adjusted for zoom coming from?
- float zoomFactor = style()->effectiveZoom();
- baseline += static_cast<int>((zoomFactor > 1.25 ? 2 : 3) * zoomFactor);
- return baseline;
-}
-
-
-int RenderMathMLUnderOver::nonOperatorHeight() const
-{
- int nonOperators = 0;
- for (RenderObject* current = firstChild(); current; current = current->nextSibling()) {
- if (current->firstChild()->isRenderMathMLBlock()) {
- RenderMathMLBlock* block = toRenderMathMLBlock(current->firstChild());
- if (!block->isRenderMathMLOperator())
- nonOperators += getOffsetHeight(current);
- } else {
- nonOperators += getOffsetHeight(current);
- }
- }
- return nonOperators;
-}
-
-}
-
-
-#endif // ENABLE(MATHML)
generated by cgit v1.1 at 2025-06-04 00:44:01 +0000