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Bug 662756 - The default value for attributes lspace/rspace of <mo> should be thickmathspace. r=karlt

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This commit is contained in:
Frédéric Wang 2012-06-26 15:42:56 -07:00
parent c8c4b74add
commit 4853dfd9c9
1 changed files with 18 additions and 8 deletions
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26
layout/mathml/nsMathMLmoFrame.cpp
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@ -339,14 +339,24 @@ nsMathMLmoFrame::ProcessOperatorData()
mFlags &= ~NS_MATHML_OPERATOR_FORM; // clear the old form bits
mFlags |= form;
// lookup the operator dictionary
float lspace = 0.0f;
float rspace = 0.0f;
nsAutoString data;
mMathMLChar.GetData(data);
bool found = nsMathMLOperators::LookupOperator(data, form, &mFlags, &lspace, &rspace);
if (found && (lspace || rspace)) {
// cache the default values of lspace & rspace that we get from the dictionary.
// Use the default value suggested by the MathML REC.
// http://www.w3.org/TR/MathML/chapter3.html#presm.mo.attrs
// thickmathspace = 5/18em
float lspace = 5.0/18.0;
float rspace = 5.0/18.0;
if (NS_MATHML_OPERATOR_IS_INVISIBLE(mFlags)) {
// mMathMLChar has been reset in ProcessTextData so we can not find it
// in the operator dictionary. The operator dictionary always uses
// lspace = rspace = 0 for invisible operators.
lspace = rspace = 0.0;
} else {
// lookup the operator dictionary
nsAutoString data;
mMathMLChar.GetData(data);
nsMathMLOperators::LookupOperator(data, form, &mFlags, &lspace, &rspace);
}
if (lspace || rspace) {
// Cache the default values of lspace and rspace.
// since these values are relative to the 'em' unit, convert to twips now
nscoord em;
nsRefPtr<nsFontMetrics> fm;