[squeak-dev] Unicode fonts and MultiCompositionScaner

Andrey Larionov anlarionov at gmail.com
Thu Apr 16 21:52:09 UTC 2009


Sorry for hestiating, but since Unicode is come and Character ranges
are enlarged, should we review this hardcodes?

On Fri, Apr 17, 2009 at 01:09, Eliot Miranda <eliot.miranda at gmail.com> wrote:
>
>
> On Thu, Apr 16, 2009 at 1:05 PM, Andrey Larionov <anlarionov at gmail.com>
> wrote:
>>
>> Investigating reasons of fail FontTest tests i found bug in
>> MultiCompositionScaner (or it maybe some related class). Looks like
>> what Character value: 257 had a special meaning in squeak.
>
> 257 was the code THE scan characters primitive answered when it reached the
> end of the input string.
> 258 was the code it returned when the next character to be output would have
> crOssed over the right-hand margin.
> Alas none of this is documented in the blue book.  You have to extract it
> from e.g. the Xerox V2.0 sources.
> Here's the defines from an ancient VM of mine:
> /* TextConstants pool variables initialised in Text */
> #define CrossedX 258
> #define EndOfRun 257
>
>>
>> If not use
>> StrikeFont everything is well, but if you choose FreeType font the
>> doing something
>> (Character value: 257) asString asTextMorph openInWorld
>> creates an endles loop in composer. It founds character falls in
>> crossedX method (this character is stopCondition) and then remove
>> character from composition and starts again.
>>
>
>
>
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