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check if em size is 0

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This commit is contained in:
Lu Wang 2013-07-01 12:01:29 +08:00
parent 50d261867a
commit 1fc7027395
1 changed files with 4 additions and 2 deletions
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6
src/HTMLState.h
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@ -34,8 +34,10 @@ struct HTMLTextState
// the offset cause by a single ' ' char
double single_space_offset(void) const {
assert(font_info->em_size != 0);
return word_space + letter_space + font_info->space_width / font_info->em_size * font_size;
double offset = word_space + letter_space;
if(font_info->em_size != 0)
offset += font_info->space_width / font_info->em_size * font_size;
return offset;
}
// calculate em_size of this state
double em_size(void) const {