On 14/12/2012 21:15, patspiper wrote:
On 14/12/12 21:33, Martin wrote:
On 13/12/2012 14:39, Martin wrote:
Ok, bad news, I did some more testing myself, and it turns out, that
WIndows allocates the extra space (song connection line) just
anywhere in the word, or at the end of it, but not always where the
ligation is.
.....
So what's next.
The only way to support this, is to make SynEdit aware of the
ligatures. And that is a lot of work, so it will take more time. And
I don't yet know when I will schedule it....
Ok, I found a quick way to get a use-able behaviour.
:)
* it is currently WINDOWS ONLY
:(
For GTK, I believe this
functionhttp://developer.gnome.org/pango/stable/pango-Text-Processing.html#pango-get-log-attrs
can deliver the information needed.
But in addition there may be a need for further fixes/improvements in
ExtTextOut (widgetset)
Other WidgetSets: No idea
If anyone wants to give GTK a try, I will mail what needs to be done.
- ligatures are handled as follows.
There is no middle caret
Depending on the caret being before or after (and accordingly
backspace or delete being used) the first or 2nd char is deleted
# So it is 2 chars, but any caret move will just be translated into
skipping the middle pos
When you mention ligatures, do you mean any 2 connected characters
(ex: ???), or characters that combine such as Lam Alef (??)?
Lam Alef
combining codepoints (such as dots or accents added to chars) are
handled diferrently (SynEdit knows them for Arabic Only):
- Backspace (from behind the char), deletes one codepoint
- Delete (from before the char) deletes char + all combining (leaving
the dot without the char makes little sense?)
combining codepoints not known to synedit (none arabic), will act like
ligatures.
I tested the behaviour of Libre Office Writer (Ubuntu):
- Damma or shadda or similar will combine with the affected character
and form one character as far as the cursor movement is concerned.
Backspace after the combined character will remove the damma. Delete
before the character will remove both.
See above
- Lam Alef produced by pressing a single keyboard key (?) acts as a
single character in all aspects.
- Lam followed by Alef will combine visually into one character (??)
but acts as 2 characters in all aspects.
I can not test (I don't know haw to write Arabic, except for hitting
random keys on an Arabic layout). If the single keystroke, produces a
single utf8 char, then yes.
SynEdit works on Utf8 Codepoints. Except where it finds combining
Codepoints, if they are in the list of combining, that SynEdit includes.
----------
On addition, it asks Windows, if any sequence of codepoints is drawn as
a single glyph. This is used to calculate the position of the caret, in
relation to each glyph, as well as the length of the line, and where to
apply highlights.
--
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