TextExpander Snippet: Slug to Title Case

textexpander-snippet-slug-to-title-case.js

function toTitleCase(text) {
		var wordsToLeaveInLowerCase = [
        'a',
        'about',
        'above',
        'after',
        'again',
        'against',
        'an',
        'and',
        'any',
        'as',
        'at',
        'because',
        'before',
        'below',
        'between',
        'both',
        'but',
        'by',
        'down',
        'during',
        'each',
        'for',
        'from',
        'further',
        'how',
        'if',
        'in',
        'into',
        'more',
        'most',
        'nor',
        'of',
        'on',
        'or',
        'out',
        'over',
        'she',
        'so',
        'than',
        'that',
        'that\'s',
        'the',
        'this',
        'those',
        'through',
        'to',
        'under',
        'until',
        'up',
        'what',
        'when',
        'where',
        'which',
        'while',
        'with'
    ],
    wordsWithSpecialCase = [
        ['adp', 'ADP'],
        ['amex', 'AmEx'],
        ['amg', 'AMG'],
        ['aws', 'AWS'],
        ['codepen', 'CodePen'],
        ['cpanel', 'cPanel'],
        ['fsa', 'FSA'],
        ['ebay', 'eBay'],
        ['intellij', 'IntelliJ'],
        ['iphone', 'iPhone'],
        ['mysql', 'MySQL'],
        ['php', 'PHP'],
        ['phpstorm', 'PHPStorm'],
        ['sql', 'SQL'],
        ['ssh', 'SSH'],
        ['ssl', 'SSL'],
        ['usa', 'USA']
    ],
    reducer = function(accumulator, currentValue) {return accumulator + '|' + currentValue[0];},
    wordsWithSpecialCaseRegEx = new RegExp(wordsWithSpecialCase.reduce(reducer).replace(/,\w+/, ''), 'i');


    // NOT PART OF THE NORMAL TITLE-CASE SNIPPET
    // Strip dashes
    text = text.replace(/-/g, ' ');
    // Decode URI as needed
    text = decodeURIComponent(text);


    // Handle line breaks
    text = text.replace(/([a-z])-[\r\n]([a-z])/g, "$1$2");
    text = text.replace(/[\r\n]+/g, " ");


    // Convert to Title Case
    // Logic modified from https://stackoverflow.com/questions/196972/convert-string-to-title-case-with-javascript
    text = text.replace(/\w\S*/mg, function(txt) {
    		var txtLC = txt.toLowerCase(),
        	wordIndex,
        	specialCaseWordsCount = wordsWithSpecialCase.length;
        for (wordIndex = 0; wordIndex < specialCaseWordsCount; wordIndex++) {
        		if (txtLC === wordsWithSpecialCase[wordIndex][0]) {
            	return wordsWithSpecialCase[wordIndex][1];
            }
        }
        if (wordsToLeaveInLowerCase.indexOf(txtLC) !== -1) {
            return txtLC;
        }
        return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    });
    
    if (!wordsWithSpecialCaseRegEx.test(text)) {
        text = text.charAt(0).toUpperCase() + text.substr(1);
    }


    // Handle subtitles
    text = text.replace(/\W [a-z]/g, function (text) {
        return text.toUpperCase().replace(/\s/, ': ').replace(/::/, ':');
    });


    // Handle hyphenated (or en-dash-hyphenated) words
    text = text.replace(/\w[-–][a-z]/g, function (text) {
        return text.charAt(0) + text.charAt(1) + text.charAt(2).toUpperCase();
    });


    return text;
}


// Start with the clipboard content 
var result = TextExpander.pasteboardText;


result = toTitleCase(result);


// Return the result
TextExpander.appendOutput(result);

Converts a "slugified" (kebab-case) piece of text, such as cool-file-i-just-downloaded.pdf, to its (English) title-case equivalent, such as Cool File I Just Downloaded.pdf.

This is imperfect and may break on acronyms, but it meets 99% of my needs when I want to give a file a more friendly name.