56 lines
1.8 KiB
JavaScript
56 lines
1.8 KiB
JavaScript
//
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// Applesoft BASIC in Javascript
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// Bell - play an audio file for the CHR$(7) "BEL" beep
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//
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// Copyright (C) 2009-2011 Joshua Bell
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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var Bell;
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if (typeof Bell !== 'function') {
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Bell = function(base) {
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var tag;
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// Prefer HTML5 audio
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tag = document.createElement('audio');
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if (typeof tag.canPlayType === 'function') {
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tag.setAttribute('preload', 'true');
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if (tag.canPlayType('audio/mp3')) {
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tag.setAttribute('src', base + 'bell.mp3');
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} else if (tag.canPlayType('audio/ogg')) {
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tag.setAttribute('src', base + 'bell.ogg');
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} else if (tag.canPlayType('audio/wav')) {
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tag.setAttribute('src', base + 'bell.wav');
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}
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this.play = function() { tag.play(); };
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this.stop = function() { tag.pause(); tag.currentTime = 0; };
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return;
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}
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// Fallback for IE<9
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tag = document.createElement('bgsound');
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if ('loop' in tag) {
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tag.src = base + 'bell.wav';
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tag.loop = 1;
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this.play = function() { document.body.appendChild(tag); };
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this.stop = function() { document.body.removeChild(tag); };
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return;
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}
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this.play = function() { };
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this.stop = function() { };
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};
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}
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