Overleaf/services/web/public/js/ace/mode/behaviour/xml.js

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define(function(require, exports, module) {
"use strict";

var oop = require("../../lib/oop");
var Behaviour = require("../behaviour").Behaviour;
var CstyleBehaviour = require("./cstyle").CstyleBehaviour;
var TokenIterator = require("../../token_iterator").TokenIterator;

function hasType(token, type) {
    var tokenTypes = token.type.split('.');
    return type.split('.').every(function(type){
        return (tokenTypes.indexOf(type) !== -1);
    });
    return hasType;
}

var XmlBehaviour = function () {
    
    this.inherit(CstyleBehaviour, ["string_dquotes"]); // Get string behaviour
    
    this.add("autoclosing", "insertion", function (state, action, editor, session, text) {
        if (text == '>') {
            var position = editor.getCursorPosition();
            var iterator = new TokenIterator(session, position.row, position.column);
            var token = iterator.getCurrentToken();

            if (token && hasType(token, 'string') && iterator.getCurrentTokenColumn() + token.value.length > position.column)
                return;
            var atCursor = false;
            if (!token || !hasType(token, 'meta.tag') && !(hasType(token, 'text') && token.value.match('/'))){
                do {
                    token = iterator.stepBackward();
                } while (token && (hasType(token, 'string') || hasType(token, 'keyword.operator') || hasType(token, 'entity.attribute-name') || hasType(token, 'text')));
            } else {
                atCursor = true;
            }
            if (!token || !hasType(token, 'meta.tag.name') || iterator.stepBackward().value.match('/')) {
                return;
            }
            var tag = token.value;
            if (atCursor){
                var tag = tag.substring(0, position.column - token.start);
            }

            return {
               text: '>' + '</' + tag + '>',
               selection: [1, 1]
            }
        }
    });

    this.add('autoindent', 'insertion', function (state, action, editor, session, text) {
        if (text == "\n") {
            var cursor = editor.getCursorPosition();
            var line = session.getLine(cursor.row);
            var rightChars = line.substring(cursor.column, cursor.column + 2);
            if (rightChars == '</') {
                var next_indent = this.$getIndent(line);
                var indent = next_indent + session.getTabString();

                return {
                    text: '\n' + indent + '\n' + next_indent,
                    selection: [1, indent.length, 1, indent.length]
                }
            }
        }
    });
    
}
oop.inherits(XmlBehaviour, Behaviour);

exports.XmlBehaviour = XmlBehaviour;
});