scripts/domutils.js
author Dan
Fri, 15 Aug 2008 23:31:37 -0400
changeset 33 3b4aef1efff6
parent 11 0faea3a6c881
child 58 05a69bab5f10
permissions -rw-r--r--
Removed requirement for detecting home directory; artwork fetcher relies on return from saveCurrentPlaylist now
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// The "Dynano" Javascript framework. Similar in syntax to JQuery but only has what Enano needs.
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// License = GPLv2
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var $ = function(id)
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{
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  return new DNobj(id);
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}
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var $dynano = $;
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function DNobj(id)
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{
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  this.object = ( typeof(id) == 'object' ) ? id : document.getElementById(id);
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  if ( !this.object )
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  {
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    this.object = false;
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    return this;
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  }
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  this.height = __DNObjGetHeight(this.object);
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  this.width = __DNObjGetWidth(this.object);
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}
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function __DNObjGetHeight(o) {
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  return o.offsetHeight;
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}
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function __DNObjGetWidth(o) {
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  return o.offsetWidth;
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}
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function addClass(obj, clsname)
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{
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  var cnt = obj.className;
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  var space = ( (cnt + '').length > 0 ) ? ' ' : '';
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  var cls = cnt + space + clsname;
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  obj.className = cls;
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}
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function rmClass(obj, clsname)
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{
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  var cnt = obj.className;
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  if ( cnt == clsname )
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  {
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    obj.className = '';
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  }
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  else
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  {
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    cnt = cnt.replace(clsname, '');
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    cnt = trim(cnt);
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    obj.className = cnt;
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  }
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}
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function hasClass(obj, clsname)
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{
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  var cnt = obj.className;
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  if ( !cnt )
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    return false;
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  if ( cnt == clsname )
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    return true;
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  cnt = cnt.split(' ');
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  for ( var i in cnt )
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    if ( cnt[i] == clsname )
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      return true;
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  return false;
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}
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function __DNObjGetLeft(obj) {
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  var left_offset = obj.offsetLeft;
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  while ((obj = obj.offsetParent) != null) {
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    left_offset += obj.offsetLeft;
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  }
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  return left_offset;
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}
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function __DNObjGetTop(obj) {
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  var left_offset = obj.offsetTop;
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  while ((obj = obj.offsetParent) != null) {
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    left_offset += obj.offsetTop;
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  }
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  return left_offset;
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}
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DNobj.prototype.addClass = function(clsname) { addClass(this.object, clsname); return this; };
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DNobj.prototype.rmClass  = function(clsname) { rmClass( this.object, clsname); return this; };
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DNobj.prototype.hasClass = function(clsname) { return hasClass(this.object, clsname); };
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DNobj.prototype.Height   = function()        { return __DNObjGetHeight(this.object); }
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DNobj.prototype.Width    = function()        { return __DNObjGetWidth( this.object); }
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DNobj.prototype.Left     = function()        { /* return this.object.offsetLeft; */ return __DNObjGetLeft(this.object); }
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DNobj.prototype.Top      = function()        { /* return this.object.offsetTop;  */ return __DNObjGetTop( this.object); }
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// Equivalent to PHP trim() function
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function trim(text)
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{
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  text = text.replace(/^([\s]+)/, '');
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  text = text.replace(/([\s]+)$/, '');
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  return text;
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}
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// Tell which elements have the specified CSS class
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// Parameters:
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//   * object - HTMLElement
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//   * string - class name
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//   * string - tag name, if omitted will test all elements (slow)
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function getElementsByClassName(oRoot, className, tagName)
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{
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  tagName = ( tagName ) ? tagName : '*';
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  var arrEls = document.getElementsByTagName(tagName);
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  var arrResult = [];
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  for ( var i = 0; i < arrEls.length; i++ )
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  {
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    if ( $(arrEls[i]).hasClass(className) )
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    {
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      arrResult.push(arrEls[i]);
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    }
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  }
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  return arrResult;
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}
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// shortcut :)
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document.getElementsByClassName = function(a, b)
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{
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  return getElementsByClassName(document, a, b);
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}
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