121 lines
3.5 KiB
JavaScript
121 lines
3.5 KiB
JavaScript
/*
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Timer Library
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$Id$
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Copyright (c) 2005, Six Apart, Ltd.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following disclaimer
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in the documentation and/or other materials provided with the
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distribution.
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* Neither the name of "Six Apart" nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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Timer = new Class( Object, {
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init: function( callback, delay, count ) {
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this.callback = callback;
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this.delay = max( delay, 1 );
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this.nextDelay = this.delay;
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this.startTime = 0;
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this.count = count;
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this.execCount = 0;
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this.state = "new";
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this.timeout = null;
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this.id = Unique.id();
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this.start();
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},
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destroy: function() {
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this.stop();
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this.callback = null;
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},
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exec: function() {
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this.execCount++;
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this.callback( this );
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if ( this.count && this.execCount >= this.count ) {
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return this.destroy();
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}
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if( this.state == "started" )
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this.run();
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},
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run: function() {
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this.state = "started";
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this.timeout = window.setTimeout( this.exec.bind( this ), this.nextDelay );
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this.nextDelay = this.delay;
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var date = new Date();
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this.startTime = date.UTC;
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},
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start: function() {
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switch( this.state ) {
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case "new":
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case "paused":
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case "stopped":
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this.run();
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break;
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}
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},
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stop: function() {
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this.state = "stopped";
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try {
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window.clearTimeout( this.timeout );
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} catch( e ) {}
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this.timeout = null;
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},
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pause: function() {
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if( this.state != "started" )
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return;
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this.stop();
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this.state = "paused";
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var date = new Date();
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this.nextDelay = max( this.delay - (date.UTC - this.startTime), 1 );
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},
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reset: function( delay ) {
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if( this.state != "started" )
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return;
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if( defined( delay ) )
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this.delay = this.nextDelay = max( delay, 1 );
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try {
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window.clearTimeout( this.timeout );
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} catch( e ) {}
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this.timeout = window.setTimeout( this.exec.bind( this ), this.nextDelay );
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}
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} );
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