- From: Florian Rivoal <florianr@opera.com>
- Date: Sat, 05 May 2012 07:09:49 +0200
- To: www-style@w3.org
On Sat, 05 May 2012 02:03:28 +0200, fantasai <fantasai.lists@inkedblade.net> wrote: > On 05/04/2012 02:02 PM, Florian Rivoal wrote: >> On Fri, 04 May 2012 20:23:25 +0200, Koji Ishii >> <kojiishi@gluesoft.co.jp> wrote: >> >>>> If text-align is center or <string>, I am even more at loss when >>>> trying to imagine what the >>>> expected behavior is. >>> >>> I hope it's clear now, UA measures string without the ending stop, and >>> center the line, if "force-end". >> >> Do you mean this? >> >> | ab c de |, >> >> text-align: "." center; hanging-punctuation:force-end; >> | 1234.56 |, >> | 1.2 |, > > No. You have to understand that hanging-punctuation *does not* mean > that the punctuation is forced outside the line box. With allow-end, of course. But I though the goal of force-end was precisely to do that. As it seems it isn't, maybe force-end isn't a good name. > It means that the punctuation is considered to have a zero advance width > *when* it is defined to "hang". > > That is all. Period. So, if the only effect of force-end is to not measure the advance of the punctuation, then example 17 should not look the way it does, unless text-align:justify is also applied, which should be reflected in the css shown. Otherwise, it reinforces the preconception that "hangs" means "is put outsite of the line box". That would also mean that force-end and allow-end have the exact same effect on left aligned ltr text and right aligned rtl text. On centered text (when the line isn't full), it would just mean a slight shift towards the end of the line. After re-reading the spec, I think that that is indeed what it tries to says. In that case, I think we have a terminology issue. I take the classical meaning of "a punctuation mark hangs" outside of this spec to be that it is put in the padding/margin. Due to that, when I read "When a punctuation mark hangs, it is not considered when measuring the line's contents for fit, alignment, or justification." I thought it was describing an effect of what happens when punctuations is put into the padding/margin due to allow-end or force-end. I now think that this sentences is actually defining what "hangs" means in this spec. That should be made more obvious, since it is redefining a term that has a preexisting meaning. Also if "hang" is defined by the above sentence, it is used inconsistently. - "At most one punctuation character may hang outside each edge of the line." only makes sense with th classical meaning of "hangs". - the description of the 'none' value should then probably be "no character hangs" rather than "no character can hang", as the later wording suggests the classical meaning of "hangs". - "Non-zero start and end borders or padding on an inline box are not allowed to hang" is problematic, as you have only defined "hang" for punctuation marks, not for borders or padding - "a period at the end of an inline box with end padding cannot hang outside the end edge of a line." does "hang" in this case mean "end up outside of the line box" or "isn't measured for the sake of fit, alignment, or justification". The sentence makes most sense with the first meaning, but even though you say that only the second meaning holds. If I have now correctly understood the expected behavior, I think a rewording is in order, either to make the definition of "hang" more explicit and to use it more consistently, or to let "hang" have its classical meaning of "ends up outside the line box", and to use another term for "isn't measured for fit, alignment, or justification" If I am still wrong about what this is supposed to mean, then please enlighten me. - Florian
Received on Saturday, 5 May 2012 05:05:00 UTC