Detect Editing Area or Page Template

<?php
function my_editor_style() {
    global $current_screen;
    switch ($current_screen->post_type) {
    case 'post':
    //echo '<script>alert("post");</script>';
        break;
    case 'page':
        echo '<script type="text/javascript" src="'.get_bloginfo('template_directory') .'/custom-fields/options.js"></script>
        <link rel="stylesheet" href="'.get_bloginfo('template_directory').'/custom-fields/editing.css" type="text/css" media="all" />';
        break;
    case 'acf': // CPT
    //echo '<script>alert("post");</script>';
        break;
    }

/*
    // GET BY PAGE TEMPLATE
    // I couldn't make the add_editor_style work, so I used the above echo '<script>...';

    switch ($GLOBALS['post']-&gt;page_template) {
    case 'page-two-column.php': // Change to your template filename
            add_editor_style('editor-style-two-column.css');
        break;
    default:
            add_editor_style('editor-style.css');
        break;
}
*/
}
add_action( 'admin_head', 'my_editor_style' );