JIRA paste table helper

jira-paste-tablizied.js

/*
Listens for a paste event into a JIRA wiki textarea
If there is at least one tab and newline in the pasted text,
and then every line contains the same number of tabs,
it is turned into a table using JIRA wiki markup syntax.
By Greg MacLellan, 2014-04-09. BSD License.
*/
jQuery('textarea.wiki-textfield').live('paste', function() {
    var self = jQuery(this);
    var originalText = self.val();
    var originalStart = self[0].selectionStart;
    var originalEnd = self[0].selectionEnd;
    console.log('pasted text', self);
    setTimeout(function() {
        var newText = self.val();
        var endOfPaste = self[0].selectionStart;

        //console.log('pasted text: original start/end: ', originalStart, originalEnd, /*'calculated start/end:', start, end, */ 'current', self[0].selectionStart, self[0].selectionEnd);
        var pasted = newText.substr(originalStart, endOfPaste).trim();

        if ((pasted.indexOf('\t') > 0) && (pasted.indexOf('\n') > 0)) {
            var lines = pasted.split('\n');
            var expectedNumColumns = lines[0].match(/\t/g);
            if (expectedNumColumns == null) {
                console.log('pasted text: could not find any columns in first line -- not tablizing');
                return;
            }
            var tablized = '||'+lines[0].replace(/\t/g,'||')+'||\n';
            for(var i=1;i<lines.length;i++){
                // count number of columns in each row, if it doesn't match
                // the first, then stop everything, we won't be replacing the text.
                var numColumns = lines[i].match(/\t/g);
                if (numColumns == null || numColumns.count != expectedNumColumns.count) {
                    console.log('pasted text: row '+i+' has '+(numColumns ? numColumns.count : 0)+' columns but first row has '+expectedNumColumns.count+' - not tablizing');
                    return;
                }

                tablized += '|'+lines[i].replace(/\t/g,'|')+'|\n';
            }
            console.log('pasted text: tablized', self, pasted, tablized);

            var finalText = '';
            if (originalStart > 0) {
                finalText = originalText.substring(0, originalStart) + '\n\n';
            }
            finalText += tablized + '\n' + originalText.substring(originalEnd);

            self.val(finalText);
        } else {
            console.log('pasted text: contains no tabs/newslines. ignoring.');
        }
    });
});