TextDirection determineParagraphDirectionality(const TextRun& textRun, bool* hasStrongDirectionality = 0)
{
BidiResolver<TextRunIterator, BidiCharacterRun> resolver;
resolver.setStatus(BidiStatus(LTR, false));
resolver.setPositionIgnoringNestedIsolates(TextRunIterator(&textRun, 0));
return resolver.determineParagraphDirectionality(hasStrongDirectionality);
}
TextDirection directionForRun(TextRun& run, bool& hasStrongDirectionality)
{
BidiResolver<TextRunIterator, BidiCharacterRun> bidiResolver;
bidiResolver.setStatus(BidiStatus(run.direction(), run.directionalOverride()));
bidiResolver.setPositionIgnoringNestedIsolates(TextRunIterator(&run, 0));
return bidiResolver.determineParagraphDirectionality(&hasStrongDirectionality);
}
// Almost the same as determineDirectionality in core/html/HTMLElement.cpp, but
// that one uses a "plain" TextRunIterator (which only checks for '\n').
static TextDirection determineDirectionality(const String& value, bool& hasStrongDirectionality)
{
TextRun run(value);
BidiResolver<VTTTextRunIterator, BidiCharacterRun> bidiResolver;
bidiResolver.setStatus(BidiStatus(LTR, false));
bidiResolver.setPositionIgnoringNestedIsolates(VTTTextRunIterator(&run, 0));
return bidiResolver.determineParagraphDirectionality(&hasStrongDirectionality);
}
TEST(BidiResolver, Basic)
{
bool hasStrongDirectionality;
String value("foo");
TextRun run(value);
BidiResolver<TextRunIterator, BidiCharacterRun> bidiResolver;
bidiResolver.setStatus(BidiStatus(run.direction(), run.directionalOverride()));
bidiResolver.setPositionIgnoringNestedIsolates(TextRunIterator(&run, 0));
TextDirection direction = bidiResolver.determineParagraphDirectionality(&hasStrongDirectionality);
EXPECT_TRUE(hasStrongDirectionality);
EXPECT_EQ(LTR, direction);
}
TextDirection directionForRun(TextRun& run, bool* hasStrongDirectionality)
{
if (!hasStrongDirectionality) {
// 8bit is Latin-1 and therefore is always LTR.
if (run.is8Bit())
return LTR;
// length == 1 for more than 90% of cases of width() for CJK text.
if (run.length() == 1 && U16_IS_SINGLE(run.characters16()[0]))
return directionForCharacter(run.characters16()[0]);
}
BidiResolver<TextRunIterator, BidiCharacterRun> bidiResolver;
bidiResolver.setStatus(BidiStatus(run.direction(), run.directionalOverride()));
bidiResolver.setPositionIgnoringNestedIsolates(TextRunIterator(&run, 0));
return bidiResolver.determineParagraphDirectionality(hasStrongDirectionality);
}