jquery/src/attributes.js
2009-11-28 04:09:14 +08:00

269 lines
7.5 KiB
JavaScript

jQuery.fn.extend({
attr: function( name, value ) {
return access(this, name, value, true, jQuery.attr);
},
addClass: function( value ) {
if ( value && typeof value === "string" ) {
var classNames = (value || "").split(/\s+/);
for ( var i = 0, l = this.length; i < l; i++ ) {
var elem = this[i];
if ( elem.nodeType === 1 ) {
if ( !elem.className ) {
elem.className = value;
} else {
var className = " " + elem.className + " ";
for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
if ( className.indexOf( " " + classNames[c] + " " ) < 0 ) {
elem.className += " " + classNames[c];
}
}
}
}
}
}
return this;
},
removeClass: function( value ) {
if ( (value && typeof value === "string") || value === undefined ) {
var classNames = (value || "").split(/\s+/);
for ( var i = 0, l = this.length; i < l; i++ ) {
var elem = this[i];
if ( elem.nodeType === 1 && elem.className ) {
if ( value ) {
var className = " " + elem.className + " ";
for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
className = className.replace(" " + classNames[c] + " ", " ");
}
elem.className = className.substring(1, className.length - 1);
} else {
elem.className = "";
}
}
}
}
return this;
},
hasClass: function( selector ) {
var className = " " + selector + " ";
for ( var i = 0, l = this.length; i < l; i++ ) {
if ( (" " + this[i].className + " ").indexOf( className ) > -1 ) {
return true;
}
}
return false;
},
val: function( value ) {
if ( value === undefined ) {
var elem = this[0];
if ( elem ) {
if( jQuery.nodeName( elem, 'option' ) ) {
return (elem.attributes.value || {}).specified ? elem.value : elem.text;
}
// We need to handle select boxes special
if ( jQuery.nodeName( elem, "select" ) ) {
var index = elem.selectedIndex,
values = [],
options = elem.options,
one = elem.type == "select-one";
// Nothing was selected
if ( index < 0 ) {
return null;
}
// Loop through all the selected options
for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
var option = options[ i ];
if ( option.selected ) {
// Get the specifc value for the option
value = jQuery(option).val();
// We don't need an array for one selects
if ( one ) {
return value;
}
// Multi-Selects return an array
values.push( value );
}
}
return values;
}
// Everything else, we just grab the value
return (elem.value || "").replace(/\r/g, "");
}
return undefined;
}
// Typecast once if the value is a number
if ( typeof value === "number" ) {
value += '';
}
var val = value;
return this.each(function(){
if(jQuery.isFunction(value)) {
val = value.call(this);
// Typecast each time if the value is a Function and the appended
// value is therefore different each time.
if( typeof val === "number" ) {
val += '';
}
}
if ( this.nodeType != 1 ) {
return;
}
if ( jQuery.isArray(val) && /radio|checkbox/.test( this.type ) ) {
this.checked = jQuery.inArray(this.value || this.name, val) >= 0;
}
else if ( jQuery.nodeName( this, "select" ) ) {
var values = jQuery.makeArray(val);
jQuery( "option", this ).each(function(){
this.selected = jQuery.inArray( this.value || this.text, values ) >= 0;
});
if ( !values.length ) {
this.selectedIndex = -1;
}
} else {
this.value = val;
}
});
}
});
jQuery.each({
removeAttr: function( name ) {
jQuery.attr( this, name, "" );
if (this.nodeType == 1) {
this.removeAttribute( name );
}
},
toggleClass: function( classNames, state ) {
var type = typeof classNames;
if ( type === "string" ) {
// toggle individual class names
var isBool = typeof state === "boolean", className, i = 0,
classNames = classNames.split( /\s+/ );
while ( (className = classNames[ i++ ]) ) {
// check each className given, space seperated list
state = isBool ? state : !jQuery(this).hasClass( className );
jQuery(this)[ state ? "addClass" : "removeClass" ]( className );
}
} else if ( type === "undefined" || type === "boolean" ) {
if ( this.className ) {
// store className if set
jQuery.data( this, "__className__", this.className );
}
// toggle whole className
this.className = this.className || classNames === false ? "" : jQuery.data( this, "__className__" ) || "";
}
}
}, function(name, fn){
jQuery.fn[ name ] = function(){
return this.each( fn, arguments );
};
});
jQuery.extend({
attr: function( elem, name, value ) {
// don't set attributes on text and comment nodes
if (!elem || elem.nodeType == 3 || elem.nodeType == 8) {
return undefined;
}
if ( name in jQuery.fn && name !== "attr" ) {
return jQuery(elem)[name](value);
}
var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
// Whether we are setting (or getting)
set = value !== undefined;
// Try to normalize/fix the name
name = notxml && jQuery.props[ name ] || name;
// Only do all the following if this is a node (faster for style)
if ( elem.nodeType === 1 ) {
// These attributes require special treatment
var special = /href|src|style/.test( name );
// Safari mis-reports the default selected property of a hidden option
// Accessing the parent's selectedIndex property fixes it
if ( name == "selected" && elem.parentNode ) {
elem.parentNode.selectedIndex;
}
// If applicable, access the attribute via the DOM 0 way
if ( name in elem && notxml && !special ) {
if ( set ) {
// We can't allow the type property to be changed (since it causes problems in IE)
if ( name == "type" && /(button|input)/i.test(elem.nodeName) && elem.parentNode ) {
throw "type property can't be changed";
}
elem[ name ] = value;
}
// browsers index elements by id/name on forms, give priority to attributes.
if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) ) {
return elem.getAttributeNode( name ).nodeValue;
}
// elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
// http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
if ( name == "tabIndex" ) {
var attributeNode = elem.getAttributeNode( "tabIndex" );
return attributeNode && attributeNode.specified
? attributeNode.value
: /(button|input|object|select|textarea)/i.test(elem.nodeName)
? 0
: /^(a|area)$/i.test(elem.nodeName) && elem.href
? 0
: undefined;
}
return elem[ name ];
}
if ( !jQuery.support.style && notxml && name == "style" ) {
if ( set ) {
elem.style.cssText = "" + value;
}
return elem.style.cssText;
}
if ( set ) {
// convert the value to a string (all browsers do this but IE) see #1070
elem.setAttribute( name, "" + value );
}
var attr = !jQuery.support.hrefNormalized && notxml && special
// Some attributes require a special call on IE
? elem.getAttribute( name, 2 )
: elem.getAttribute( name );
// Non-existent attributes return null, we normalize to undefined
return attr === null ? undefined : attr;
}
// elem is actually elem.style ... set the style
// Using attr for specific style information is now deprecated. Use style insead.
return jQuery.style(elem, name, value);
}
});