HTML5 deployment: progress comes into sight

Mark Waddingham mark at livecode.com
Wed May 31 04:26:05 EDT 2017


On 2017-05-31 09:01, Dan Brown via use-livecode wrote:
> I'll also add that for all the wonderful possibilities that LCB brings
> there is a very real danger that countless hours will be spent using it 
> to
> re-invent the wheel.

That is true of every language ever implemented ;)

However, one of the goals of LCB is to allow it to be used as the 'glue' 
language allowing LiveCode Script to access 'things written in other 
languages' with (eventually) as much syntactic fidelity as you get with 
builtin-in engine functionality. Hopefully, reducing the need to 
re-invent the wheel to the minimum required to make other-world 
libraries look more LiveCode like.

i.e. One of its main goals is to rid ourselves of the need to 're-invent 
the wheel'.

> Take for instance the displaying of svg's. This is a solved problem in 
> the
> browser and has been for a long time but in native livecode it's still 
> in
> the infant stages of implementation (to put it mildly). The best 
> solutions
> for user interface "widgets" are arguably being created in the form of
> javascript libraries. To me it makes total sense to integrate with that
> ecosystem and free up LCB / livecode developer hours for solving other
> problems

True - but then if I want SVG icons in my app, and I don't need the 
browser widget at all then I might balk at the 70-100Mb bloat I have to 
add to Windows / Linux apps to get it. Furthermore, I might balk at the 
start up time of my app on mobile devices, whilst I use the browser 
widget to load all my SVGs and render them into PNGs at various sizes 
(unless you instantiate a browser widget for every SVG icon you want to 
use and want to put up with the restrictions that places on you, and the 
overhead in terms of use).

Certainly we need to be careful about 're-inventing the wheel' but that 
just means making good choices. In this case, the case for 'native' SVG 
support in LiveCode is overwhelming - the more lightweight it is, the 
faster it is, the more utility it has. (Also, the main problem here is 
'SVG as a replacement for PNG icons' which is a much smaller problem to 
solve than an editable SVG canvas - which is what you get if you go the 
via-browser route).

In terms of JavaScript 'widgets' in general, then we already have a 
reasonable strategy for using them now - you use a browser widget and 
load it in there. For example, FileMaker has a BrowserView element and 
there is a plugin 'React' which allows you to defined JavaScript 
controls and have them rendered in the browser. Admittedly using such 
things is a little trickier than we'd like at present - due to the lack 
of synchronous 'do as javascript'.

Anyway, I agree that using existing libraries and code as much as 
possible is probably the best way to expand LiveCode's capabilities - 
hence LCB :)

Warmest Regards,

Mark.

-- 
Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps




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