Check whether font is nonnull for GlyphData instead of calling GlyphData::isValid()

[Frédéric Wang (:fredw)]

See bug 155018 comment 36. Also, probably the reason for bug 159702.

fred@debian:~/webkit/WebKit/Source/WebCore/rendering/mathml$ grep '\.isValid' *
MathOperator.cpp:    return data.isValid() ? data.font->boundsForGlyph(data.glyph) : FloatRect();
MathOperator.cpp:    return data.isValid() ? data.font->widthForGlyph(data.glyph) : 0;
MathOperator.cpp:    return baseGlyph.isValid() && baseGlyph.font == &style.fontCascade().primaryFont();
MathOperator.cpp:    ASSERT(sizeVariant.isValid());
MathOperator.cpp:    ASSERT(m_assembly.extension.isValid());
MathOperator.cpp:    ASSERT(m_assembly.extension.isValid());
MathOperator.cpp:    ASSERT(m_assembly.topOrRight.isValid());
MathOperator.cpp:    ASSERT(m_assembly.bottomOrLeft.isValid());
MathOperator.cpp:    if (m_assembly.middle.isValid()) {
MathOperator.cpp:    ASSERT(m_assembly.bottomOrLeft.isValid());
MathOperator.cpp:    ASSERT(m_assembly.topOrRight.isValid());
MathOperator.cpp:    if (m_assembly.middle.isValid()) {
MathOperator.cpp:        ASSERT(m_variant.isValid());
RenderMathMLOperator.cpp:            float glyphWidth = data.isValid() ? data.font->widthForGlyph(data.glyph) : 0;
RenderMathMLToken.cpp:    if (m_mathVariantGlyph.isValid()) {
RenderMathMLToken.cpp:    if (m_mathVariantGlyph.isValid())
RenderMathMLToken.cpp:    if (!m_mathVariantGlyph.isValid()) {
RenderMathMLToken.cpp:    if (info.context().paintingDisabled() || info.phase != PaintPhaseForeground || style().visibility() != VISIBLE || !m_mathVariantGlyph.isValid())
RenderMathMLToken.cpp:    if (m_mathVariantGlyph.isValid())

[Frédéric Wang (:fredw)]

Created attachment 283740 [details]
Patch

[Brent Fulgham]

Comment on attachment 283740 [details]
Patch

I wonder if there is other code that really means "font is non-null and also isValid"? r=me

[WebKit Commit Bot]

Comment on attachment 283740 [details]
Patch

Clearing flags on attachment: 283740

Committed r203280: <http://trac.webkit.org/changeset/203280>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Frédéric Wang (:fredw)]

(In reply to comment #2)
> Comment on attachment 283740 [details]
> Patch
> 
> I wonder if there is other code that really means "font is non-null and also
> isValid"? r=me

Oh, I just saw this comment. As defined in GlyphData, isValid means "font || glyph" which sounds weird for me. So just checking 'font' is stronger...