[Lazarus] Arabic beta tester for SynEdit needed

[Martin]

On 08/12/2012 14:06, Zaher Dirkey wrote:
> From the first trying, Wow it works :D, but i need more tests.

Main question at current are the ligatures, with the long line.

1) Acceptable?

2) BEhaves as described: the editor treads the long-line, as the 2nd 
char in the ligature, (if you delete it, it will delete the correct half 
of the ligature)
(At least windows, with extra-char-spacing=1)


>
>
> On Sat, Dec 8, 2012 at 3:35 PM, Zaher Dirkey <parmaja at gmail.com 
> <mailto:parmaja at gmail.com>> wrote:
>
>     Hi,
>     Good feature for me, but my question (Off Topic), why you
>     interested in this feature while there is no many Arabic/RTL
>     Lazarus users?
>
>     For me, I will try to test it, and i like to look at the code too.
>
>
>     On Fri, Dec 7, 2012 at 12:53 AM, Martin <lazarus at mfriebe.de
>     <mailto:lazarus at mfriebe.de>> wrote:
>
>         A while ago, I started adding support for mixed LTR/RTL  text
>         in SynEdit.
>
>         The actual display of RTL text now works (that is, if you have
>         some arabic chars in the text, they display RTL, and the caret
>         moves accordingly / caret between RTL and LTR always means
>         caret at LTR).
>         uf8 LTR/RTL markers are not supported. This is absolute basics
>         only.
>
>         Unfortunately with RTL came other unicode features, that sofar
>         no one had missed. Those are at the very least
>         - combining codepoints
>         - ligatures
>         - maybe reordering of codepoints.
>         - other?
>         They are tasks of different extent. And I need to find out
>         what is mandatory, and what optional. So I can then decide,
>         what does fit into my schedule.
>
>         The current state is:
>         - combining: Only Arabic has been done (but they should be
>         complete). So none Arabic RTL will not work.
>         - ligatures: see below
>         - reordering: not researched, hopefully optional.
>
>         "work"
>         means, that the text is stable (except ligatures, only with
>         workaround), and does not expand/shrink, when selecting text,
>         or moving the caret. Also that the caret will be at the
>         correct pos. A newly inserted char will be where the caret
>         was. Can be tested by hitting the "end" key, and see if the
>         caret is at the end of visual text. If SynEdit thinks the text
>         is shorter/longer than the actual painted display, then there
>         is an issue.
>
>         ligatures:
>         The editor does not handle ligatures yet. So it calculates 2
>         screen cells, when only one is needed. However a stable
>         "workaround" exists (currently depends on config)
>
>         On windows and windows only (others will be done, if that
>         turns out to be any good). In Options / Editor / Display / set
>         "Extra CHAR spacing" to 1
>         This will slightly widen the script, ignore that, its temporary.
>         Requires a proper monospaced font. (Deja vu mono)
>
>         What it will do: It will tell windows, that the ligature is
>         expected to cover 2 display cells.
>         Display: Arabic text is a script, glyphs are connected by a
>         continuous line. The ligature will be in one cell, the next
>         cell will be empty, except for the connecting line.
>         Editing: The caret can be at either cell. Each cell stands for
>         one of the 2 chars in the ligature. So the 2nd char can be
>         edited, if the caret is at the empty cell
>
>         ------------------
>         I need feedback from people who actually speak (or at least
>         read and write) Arabic. I need to know, if the above situation
>         is "useable".
>
>         If so, then:
>         - it can be fixed to work without the extra char spacing
>         - on gtk, carbon, qt (well at least I hope)
>         - combining can be added for other languages.
>
>         If not, well I don't know yet.
>
>
>     Best Regards
>     Zaher Dirkey
>
>
>
>
> -- 
> I am using last revision of Lazarus, FPC 2.6 on Windows XP SP3
>
> Best Regards
> Zaher Dirkey
>
>
>
> --
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