78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
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#include args.js
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const MamiWindowTitle = function(options) {
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options = MamiArguments.verify(options, [
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MamiArguments.type('getName', 'function', () => ''),
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MamiArguments.type('setTitle', 'function', text => document.title = text),
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MamiArguments.check('strobeInterval', 500, val => {
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const valType = typeof val;
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return val === 'number' || val === 'function';
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}),
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MamiArguments.check('strobeRepeat', 5, val => {
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const valType = typeof val;
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return val === 'number' || val === 'function';
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}),
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]);
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const getName = options.getName;
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const setTitleImpl = options.setTitle;
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const setTitle = text => {
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if(text === undefined || text === null)
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text = '';
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else if(typeof text !== 'string')
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text = text.toString();
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setTitleImpl(text);
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};
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const defaultStrobeInterval = typeof options.strobeInterval === 'function' ? options.strobeInterval : () => options.strobeInterval;
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const defaultStrobeRepeat = typeof options.strobeRepeat === 'function' ? options.strobeRepeat : () => options.strobeRepeat;
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let activeStrobe;
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const clearTitle = () => {
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if(activeStrobe === undefined)
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return;
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clearInterval(activeStrobe);
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activeStrobe = undefined;
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setTitle(getName());
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};
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const strobeTitle = (titles, interval, repeat) => {
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if(!Array.isArray(titles))
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throw 'titles must be an array of strings';
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if(titles.length < 1)
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throw 'titles must contain at least one item';
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if(typeof interval !== 'number')
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interval = defaultStrobeInterval();
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if(typeof repeat !== 'number')
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repeat = defaultStrobeRepeat();
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const target = titles.length * repeat;
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let round = 0;
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clearTitle();
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setTitle(titles[0]);
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activeStrobe = setInterval(() => {
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if(round >= target) {
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clearTitle();
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setTitle(getName());
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return;
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}
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++round;
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setTitle(titles[round % titles.length]);
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}, interval);
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};
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return {
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set: setTitle,
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clear: clearTitle,
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strobe: strobeTitle,
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};
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};
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