Finds unused styles within a Titanium Mobile - Alloy project. In order to execute it you need to place it within the root of your Titanium project and execute it using `php find_unused_styles_in_titanium_mobile_alloy.php`. PHP should be preinstalled on almost all Macs. Script only searches for app/styles/*.tss files. It does not perform a search…

find_unused_styles_in_titanium_mobile_alloy.php

<?php

foreach (getAllTssFilenames() as $tssfile){
    echo "\nSearching for unused styles in $tssfile:\n";
    outputUnusedStyles($tssfile);
}

function getAllTssFilenames()
{
    return glob('app/styles/*.tss');
}

function outputUnusedStyles($tssfile)
{
    $selectors          = getSelectorsWithinStyleFile($tssfile);
    $relatedViewContent = getContentOfRelatedViewFile($tssfile);

    foreach ($selectors as $selector) {

        if (!usesSelector($relatedViewContent, $selector)) {
            echo "$selector\n";
        }
    }
}

function getSelectorsWithinStyleFile($tssfile)
{
    $content = file_get_contents($tssfile);

    $matches = array();
    preg_match_all('/\"(.[^\"]*)\":/', $content, $matches);

    if (!empty($matches[1])) {
        return $matches[1];
    }

    return array();
}

function getContentOfRelatedViewFile($tssfile)
{
    $relatedViewFile = getFilenameOfRelatedViewFile($tssfile);

    if (!file_exists($relatedViewFile)) {
        return '';
    }

    return file_get_contents($relatedViewFile);
}

function getFilenameOfRelatedViewFile($tssfile)
{
    return sprintf('app/views/%s.xml', basename($tssfile, '.tss'));
}

function isIdSelector($selector)
{
    return '#' === substr($selector, 0, 1);
}

function isClassSelector($selector)
{
    return '.' === substr($selector, 0, 1);
}

function removeDeviceQueryFromSelector($selector)
{
    $posOfStartDeviceQuery = strpos($selector, '[');

    if (false === $posOfStartDeviceQuery) {
        return $selector;
    }

    return substr($selector, 0, $posOfStartDeviceQuery);
}

function containsClass($viewContent, $classSelector)
{
    $classSelector = removeDeviceQueryFromSelector($classSelector);
    $className     = substr($classSelector, 1);
    $contentToFind = sprintf('class="%s"', $className);

    return false !== strpos($viewContent, $contentToFind);
}

function containsId($viewContent, $idSelector)
{
    $idSelector    = removeDeviceQueryFromSelector($idSelector);
    $idToFind      = substr($idSelector, 1);
    $contentToFind = sprintf('id="%s"', $idToFind);

    return false !== strpos($viewContent, $contentToFind);
}

function containsElement($viewContent, $elementSelector)
{
    $elementSelector = removeDeviceQueryFromSelector($elementSelector);
    $contentToFind   = sprintf('<%s', $elementSelector);

    return false !== strpos($viewContent, $contentToFind);
}

function usesSelector($viewContent, $selector)
{
    if (isClassSelector($selector)) {

        return containsClass($viewContent, $selector);

    } elseif (isIdSelector($selector)) {

        return containsId($viewContent, $selector);

    } 

    return containsElement($viewContent, $selector);
}