Re: Hang in font panel with certain fonts

[Riccardo Mottola]

Hi,

Fred Kiefer wrote:
> could you please explain what you mean by "hang"?
> And did you get the same stack trace after continuing your application
> for some time and then stopping it again?
as we discussed, we suppose there is a loop, but where?

The first thing is I put an NSLog in both methods in the typesetter and 
I get something like that when selecting the font:

<...>
2015-01-09 16:47:36.263 Ink[4401] layoutNewParagraph: 1
2015-01-09 16:47:36.266 Ink[4401] GSHorizontalTypeSetter - howMany 0
2015-01-09 16:47:36.269 Ink[4401] layoutNewParagraph: 0
2015-01-09 16:47:36.273 Ink[4401] layoutGlyphsInLayoutManager index 0 
howMany 0
2015-01-09 16:47:36.275 Ink[4401] layoutNewParagraph: 1
2015-01-09 16:47:36.278 Ink[4401] GSHorizontalTypeSetter - howMany 0
2015-01-09 16:47:36.281 Ink[4401] layoutNewParagraph: 0
2015-01-09 16:47:36.291 Ink[4401] layoutGlyphsInLayoutManager index 0 
howMany 0
2015-01-09 16:47:36.293 Ink[4401] layoutNewParagraph: 1
2015-01-09 16:47:36.307 Ink[4401] layoutGlyphsInLayoutManager index 0 
howMany 0
2015-01-09 16:47:36.309 Ink[4401] layoutNewParagraph: 1
<hang>

This means that the exit condition howMany is always true and that the 
hang is in layoutNewParagraph, which is not what we were expecting.

I then put a Log in the "main glyph loop" at about line 730 of 
GSHorizontalTypesetter
and indeeed:

2015-01-09 17:07:47.150 Ink[6497] Main glyph layout loop. i:0
2015-01-09 17:07:47.153 Ink[6497] Main glyph layout loop. i:0
2015-01-09 17:07:47.155 Ink[6497] Main glyph layout loop. i:0
2015-01-09 17:07:47.158 Ink[6497] Main glyph layout loop. i:0
2015-01-09 17:07:47.161 Ink[6497] Main glyph layout loop. i:0
2015-01-09 17:07:47.163 Ink[6497] Main glyph layout loop. i:0
<endless>

it never increments, while a usual log looks like this:
2015-01-09 17:07:31.184 Ink[6497] GSHorizontalTypeSetter - howMany 0
2015-01-09 17:07:31.187 Ink[6497] layoutNewParagraph: 0
2015-01-09 17:07:31.193 Ink[6497] layoutGlyphsInLayoutManager index 0 
howMany 0
2015-01-09 17:07:31.197 Ink[6497] layoutNewParagraph: 1
2015-01-09 17:07:31.201 Ink[6497] Main glyph layout loop. i:0
2015-01-09 17:07:31.203 Ink[6497] Main glyph layout loop. i:1
2015-01-09 17:07:31.206 Ink[6497] Main glyph layout loop. i:2
2015-01-09 17:07:31.208 Ink[6497] Main glyph layout loop. i:3
2015-01-09 17:07:31.212 Ink[6497] Main glyph layout loop. i:4
2015-01-09 17:07:31.215 Ink[6497] Main glyph layout loop. i:5
2015-01-09 17:07:31.217 Ink[6497] Main glyph layout loop. i:6
2015-01-09 17:07:31.220 Ink[6497] Main glyph layout loop. i:7
2015-01-09 17:07:31.224 Ink[6497] GSHorizontalTypeSetter - howMany 0
<...>

Thus it loops inside there, if you have ideas where to check, just tell 
me, I'll continue poking around.

Riccardo