[txmt-dev] Re: Working with indentation rules

[Stephen Bannasch]

very interesting thread -- inspired me to try making some changes to the JavaScript grammar.

Learning about ctrl-command-T and them command-4 to find out what snippet is run was interesting.

I'd like to have similar indentation behavior when entering return in a pair of square braces in JavaScript. I found a solution (listed below) -- but then I wanted a similar indentation behavior when pressing return after an open square brace followed by content as I get when I enter return after an open curly brace followed by content.

Using comand-ctrl-T and then command-4 and entering return when my cursor was after an opening curly brace produced empty results.

How do I find the code that produces the indentation after entering return when my cursor is after an opening curly brace produced empty results.

--- more details ---

When I am editing in JavaScript and have a document that contains content like this""

   "destinations": [
     {
       "type": "timeSeries",
       "componentIds": [
         "angle-graph"
       ],
       "properties": [
         "currentAngle"
       ]
     },
     {
       "type": "timeSeries",
       "componentIds": [
         "last-run-table"
       ],
       "properties": [
         "rodLength",
         "ballMass",
         "startingAngle",
         "period"
       ]
     }
   ]

If I put my cursor here (just after "{" char) and press return

   "destinations": [
     {

I get a return and approriate indentation:

   "destinations": [
     {
       <=cursor-is-here

I often also find myself wanted to add another item to the array of items and would like to have a similar indentation rule applied when entering return at the end of this line:

   "destinations": [


I started with something simpler -- enable an indentation to appear when entering return with the cursor in the middle of two square brackets.

So this:
[]

Changes to this after entering return
[
   <=cursor-is-here
]

By adding this to the JavaScript Language Grammers:

		{	comment = 'Allows the special return snippet to fire.';
			match = '(\[)(\])';
			captures = {
				1 = { name = 'punctuation.section.array.begin.js'; };
				2 = { name = 'punctuation.section.array.end.js'; };
			};
		},


So I tried to use the same technique to find out what textmate was doing when my cursor is at the beginning of a curly brace and I get an indentation when entering return -- when the opening brace is followed by more content before the ending brace.

Using comand-ctrl-T and then command-4 and entering return produced empty results.