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ICU-1943 don't do mark to mark positioning between two marks attached to different ligature components

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X-SVN-Rev: 8920
This commit is contained in:
Eric Mader 2002-06-22 00:34:39 +00:00
parent a28d72cd79
commit b5b02ebdd8
3 changed files with 30 additions and 2 deletions
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29
icu4c/source/layout/GlyphIterator.cpp
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@ -489,23 +489,50 @@ le_bool GlyphIterator::prev(le_uint32 delta)
return prevInternal(delta) && hasFeatureTag();
}
// FIXME: Why in the world did I write the code that's #if 0'd out?
le_int32 GlyphIterator::getMarkComponent(le_int32 markPosition) const
{
le_int32 component = 0;
#if 0
le_int32 posn, start = position, end = markPosition;
if (markPosition < position) {
start = markPosition;
end = position;
}
}
for (posn = start; posn <= end; posn += 1) {
if (glyphs[posn] == 0xFFFE) {
component += 1;
}
}
#else
le_int32 posn;
for (posn = position; posn != markPosition; posn += direction) {
if (glyphs[posn] == 0xFFFE) {
component += 1;
}
}
#endif
return component;
}
// This is basically prevInternal except that it
// doesn't take a delta argument, and it doesn't
// filter out 0xFFFE glyphs.
le_bool GlyphIterator::findMark2Glyph()
{
le_int32 newPosition = position;
do {
newPosition -= direction;
} while (newPosition != prevLimit && glyphs[newPosition] != 0xFFFE && filterGlyph(newPosition));
position = newPosition;
return position != prevLimit;
}
U_NAMESPACE_END

1
icu4c/source/layout/GlyphIterator.h
View file

@ -44,6 +44,7 @@ public:
void getCurrGlyphPositionAdjustment(GlyphPositionAdjustment &adjustment) const;
le_int32 getMarkComponent(le_int32 markPosition) const;
le_bool findMark2Glyph();
void getCursiveLastExitPoint(LEPoint &exitPoint) const;
LEGlyphID getCursiveLastGlyphID() const;

2
icu4c/source/layout/MarkToMarkPosnSubtables.cpp
View file

@ -20,7 +20,7 @@ U_NAMESPACE_BEGIN
LEGlyphID MarkToMarkPositioningSubtable::findMark2Glyph(GlyphIterator *glyphIterator) const
{
if (glyphIterator->prev()) {
if (glyphIterator->findMark2Glyph()) {
return glyphIterator->getCurrGlyphID();
}