wikimedia/mediawiki-extensions-UploadWizard

/* miscellaneous fileApi routines -- partially copied from mediawiki.special.upload.js, must refactor... */

( function () {

    mw.fileApi = {

        /**
         * Check if this is a recognizable image type...
         * Also excludes files over 10M to avoid going insane on memory usage.
         *
         * TODO is there a way we can ask the browser what's supported in <img>s?
         * TODO put SVG back after working around Firefox 7 bug <https://bugzilla.wikimedia.org/show_bug.cgi?id=31643>
         *
         * @param {File} file
         * @return {boolean}
         */
        isPreviewableFile: function ( file ) {
            var known = [ 'image/png', 'image/gif', 'image/jpeg' ],
                tooHuge = 10 * 1024 * 1024;
            return this.isPreviewableVideo( file ) || ( known.indexOf( file.type ) !== -1 ) && file.size > 0 && file.size < tooHuge;
        },

        /**
         * Check if this is a recognizable video type...
         *
         * @param {File} file
         * @return {boolean}
         */
        isPreviewableVideo: function ( file ) {
            var video = document.createElement( 'video' );
            return video.canPlayType && video.canPlayType( file.type ).replace( 'no', '' ) !== '';
        }

    };
}() );