/*\
title: $:/core/modules/parsers/wikiparser/rules/parsermode.js
type: application/javascript
module-type: wikirule

Wiki pragma rule for parser mode specifications

```
\parsermode block
\parsermode inline
```

\*/
(function(){

/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";

exports.name = "parsermode";
exports.types = {pragma: true};

/*
Instantiate parse rule
*/
exports.init = function(parser) {
	this.parser = parser;
	// Regexp to match
	this.matchRegExp = /^\\parsermode[^\S\n]/mg;
};

/*
Parse the most recent match
*/
exports.parse = function() {
	// Move past the pragma invocation
	this.parser.pos = this.matchRegExp.lastIndex;
	// Parse whitespace delimited tokens terminated by a line break
	var reMatch = /[^\S\n]*(\S+)|(\r?\n)/mg,
		parserMode = undefined;
	reMatch.lastIndex = this.parser.pos;
	var match = reMatch.exec(this.parser.source);
	while(match && match.index === this.parser.pos) {
		this.parser.pos = reMatch.lastIndex;
		// Exit if we've got the line break
		if(match[2]) {
			break;
		}
		// Process the token
		if(match[1]) {
			parserMode = match[1];
		}
		// Match the next token
		match = reMatch.exec(this.parser.source);
	}
	// Process the tokens
	if(parserMode !== undefined) {
		if(parserMode === "block") {
			this.parser.parseAsInline = false;
		} else if(parserMode === "inline") {
			this.parser.parseAsInline = true;
		}
	}
	// No parse tree nodes to return
	return [];
};

})();