How to to type bottom to up and right to left in a field
mark at livecode.com
Thu Sep 21 14:03:03 EDT 2017
On 2017-09-21 19:48, Mark Waddingham via use-livecode wrote:
> <slight tangent>
> For example, let's say you have a right to left language FOO which has
> letters A, B, C; compared to a left to right language BAR which has
> letters X, Y and Z. Hello in FOO is spoken A-B-C; Hello in BAR is
> spoken X-Y-Z. However, as FOO is right to left, Hello is written CBA.
> If these languages were mixed in a single piece of text - spoken as
> A-B-C X-Y-Z - then in memory the order would be ABC XYZ, but visually
> it would appear as either:
> i) from the left edge - CBA XYZ
> ii) from the right edge - XYZ CBA
> Whether it would be (i) or (ii) depends on which is considered to be
> the dominant language in that case and context.
> </slight tangent>
I should perhaps have mentioned the 'useful' outcome of the above
If text is always stored in memory in logical order (in the order we
utter it / actually read the individual constituent parts), then
processing of a string containing left-to-right text, or right-to-left
text or any mixed combination there-of needs no more thought than
processing a string which is composed of a language which is written
left-to-right - because (logically - in terms of how humans process it
themselves) there is no difference.
All apparent 'difficulties' and 'oddness' which dealing with non
left-to-right text are confined solely to the presentation layer - which
at the level of rendering text, LiveCode does for you.
This is important to remember if you are involved in localisation
applications to languages such as Arabic - the main work you have to do
is getting the translations in the first place, and *potentially* making
your app right-to-left dominant, rather than left-to-right (i.e. labels
should go on the right of fields, rather than the left, and things
should generally be aligned to the right, rather than the to the left -
although the actual alignment of text within fields / buttons etc. will
'do the right thing').
Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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