float SVGTextLayoutEngineBaseline::calculateGlyphOrientationAngle(bool isVerticalText, const SVGRenderStyle& style, const UChar& character) const
{
switch (isVerticalText ? style.glyphOrientationVertical() : style.glyphOrientationHorizontal()) {
case GO_AUTO:
// Spec: Fullwidth ideographic and fullwidth Latin text will be set with a glyph-orientation of 0-degrees.
// Text which is not fullwidth will be set with a glyph-orientation of 90-degrees.
// FIXME: There's not an accurate way to tell if text is fullwidth by looking at a single character.
switch (static_cast<UEastAsianWidth>(u_getIntPropertyValue(character, UCHAR_EAST_ASIAN_WIDTH))) {
case U_EA_NEUTRAL:
case U_EA_HALFWIDTH:
case U_EA_NARROW:
return 90;
case U_EA_AMBIGUOUS:
case U_EA_FULLWIDTH:
case U_EA_WIDE:
return 0;
case U_EA_COUNT:
ASSERT_NOT_REACHED();
break;
}
ASSERT_NOT_REACHED();
break;
case GO_90DEG:
return 90;
case GO_180DEG:
return 180;
case GO_270DEG:
return 270;
case GO_0DEG:
return 0;
}
ASSERT_NOT_REACHED();
return 0;
}
