http://git-wip-us.apache.org/repos/asf/flex-asjs/blob/77148f4a/frameworks/projects/MX/src/main/flex/mx/styles/CSSStyleDeclaration.as
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@@@ -1,1171 -1,0 +1,1171 @@@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+package mx.styles
+{
+
- COMPILE::AS3
++COMPILE::SWF
+{
+ import flash.display.DisplayObject;
+}
+COMPILE::JS
+{
+ import flex.display.DisplayObject;
+}
+import org.apache.flex.events.EventDispatcher;
+
+import mx.core.Singleton;
+import mx.core.mx_internal;
+import mx.managers.ISystemManager;
+import mx.managers.SystemManagerGlobals;
+import mx.utils.ObjectUtil;
+
+use namespace mx_internal;
+
+/**
+ * The CSSStyleDeclaration class represents a set of CSS style rules.
+ * The MXML compiler automatically generates one CSSStyleDeclaration object
+ * for each selector in the CSS files associated with a Flex application.
+ *
+ * <p>A CSS rule such as
+ * <pre>
+ * Button { color: #FF0000 }
+ * </pre>
+ * affects every instance of the Button class;
+ * a selector like <code>Button</code> is called a type selector
+ * and must not start with a dot.</p>
+ *
+ * <p>A CSS rule such as
+ * <pre>
+ * .redButton { color: #FF0000 }
+ * </pre>
+ * affects only components whose <code>styleName</code> property
+ * is set to <code>"redButton"</code>;
+ * a selector like <code>.redButton</code> is called a class selector
+ * and must start with a dot.</p>
+ *
+ * <p>You can access the autogenerated CSSStyleDeclaration objects
+ * using the <code>StyleManager.getStyleDeclaration()</code> method,
+ * passing it either a type selector
+ * <pre>
+ * var buttonDeclaration:CSSStyleDeclaration =
+ * StyleManager.getStyleDeclaration("Button");
+ * </pre>
+ * or a class selector
+ * <pre>
+ * var redButtonStyleDeclaration:CSSStyleDeclaration =
+ * StyleManager.getStyleDeclaration(".redButton");
+ * </pre>
+ * </p>
+ *
+ * <p>You can use the <code>getStyle()</code>, <code>setStyle()</code>,
+ * and <code>clearStyle()</code> methods to get, set, and clear
+ * style properties on a CSSStyleDeclaration.</p>
+ *
+ * <p>You can also create and install a CSSStyleDeclaration at run time
+ * using the <code>StyleManager.setStyleDeclaration()</code> method:
+ * <pre>
+ * var newStyleDeclaration:CSSStyleDeclaration = new
CSSStyleDeclaration(".bigMargins");
+ * newStyleDeclaration.defaultFactory = function():void
+ * {
+ * leftMargin = 50;
+ * rightMargin = 50;
+ * }
+ * StyleManager.setStyleDeclaration(".bigMargins", newStyleDeclaration,
true);
+ * </pre>
+ * </p>
+ *
+ * @see mx.core.UIComponent
+ * @see mx.styles.StyleManager
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+public class CSSStyleDeclaration extends EventDispatcher
+{
+ include "../core/Version.as";
+
+
//--------------------------------------------------------------------------
+ //
+ // Class constants
+ //
+
//--------------------------------------------------------------------------
+
+ /**
+ * @private
+ */
+ private static const NOT_A_COLOR:uint = 0xFFFFFFFF;
+
+ /**
+ * @private
+ */
+ private static const FILTERMAP_PROP:String = "__reserved__filterMap";
+
+ /**
+ * @private
+ */
+ private static var emptyObjectFactory:Function = function():void {};
+
+
//--------------------------------------------------------------------------
+ //
+ // Constructor
+ //
+
//--------------------------------------------------------------------------
+
+ /**
+ * Constructor.
+ *
+ * @param selector - If the selector is a CSSSelector then advanced
+ * CSS selectors are supported. If a String is used for the selector then
+ * only simple CSS selectors are supported. If the String starts with a
+ * dot it is interpreted as a universal class selector, otherwise it must
+ * represent a simple type selector. If not null, this
CSSStyleDeclaration
+ * will be registered with StyleManager.
+ *
+ * @param styleManager - The style manager to set this declaration into.
If the
+ * styleManager is null the top-level style manager will be used.
+ *
+ * @param autoRegisterWithStyleManager - If true set the selector in the
styleManager. The selector
+ * will only be set if both <code>selector</code> and
<code>styleManager</code> are
+ * both non-null.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+ public function CSSStyleDeclaration(selector:Object=null,
styleManager:IStyleManager2=null, autoRegisterWithStyleManager:Boolean = true)
+ {
+ super();
+
+ // Do not reference StyleManager directly because this is a bootstrap
class
+ if (!styleManager)
+ styleManager = Singleton.getInstance("mx.styles::IStyleManager2")
as IStyleManager2;
+
+ this.styleManager = styleManager;
+
+ if (selector)
+ {
+ if (selector is CSSSelector)
+ {
+ this.selector = selector as CSSSelector;
+ }
+ else
+ {
+ // Otherwise, a legacy Flex 3 String selector was provided
+ selectorString = selector.toString();
+ }
+
+ if (autoRegisterWithStyleManager)
+ styleManager.setStyleDeclaration(selectorString, this,
false);
+ }
+
+ }
+
+
//--------------------------------------------------------------------------
+ //
+ // Variables
+ //
+
//--------------------------------------------------------------------------
+
+ /**
+ * @private
+ * This Dictionary keeps track of all the style name/value objects
+ * produced from this CSSStyleDeclaration and already inserted into
+ * prototype chains. Whenever this CSSStyleDeclaration's overrides object
+ * is updated by setStyle(), these clone objects must also be updated.
+ */
+ private var clones:CloneManager = new CloneManager();
+
+ /**
+ * @private
+ * The number of CSS selectors pointing to this CSSStyleDeclaration.
+ * It will be greater than 0 if this CSSStyleDeclaration has been
+ * installed in the StyleManager.styles table by
+ * StyleManager.setStyleDeclaration().
+ */
+ mx_internal var selectorRefCount:int = 0;
+
+ /**
+ * The order this CSSStyleDeclaration was added to its StyleManager.
+ * MatchStyleDeclarations has to return the declarations in the order
+ * they were declared
+ */
+ public var selectorIndex:int = 0;
+
+ /**
+ * @private
+ * Array that specifies the names of the events declared
+ * by this CSS style declaration.
+ * This Array is used by the <code>StyleProtoChain.initObject()</code>
+ * method to register the effect events with the Effect manager.
+ */
+ mx_internal var effects:Array;
+
+ /**
+ * @private
+ * reference to StyleManager
+ */
+ private var styleManager:IStyleManager2;
+
+
//--------------------------------------------------------------------------
+ //
+ // Properties
+ //
+
//--------------------------------------------------------------------------
+
+ //----------------------------------
+ // defaultFactory
+ //----------------------------------
+
+ private var _defaultFactory:Function;
+
+ [Inspectable(environment="none")]
+
+ /**
+ * This function, if it isn't <code>null</code>,
+ * is usually autogenerated by the MXML compiler.
+ * It produce copies of a plain Object, such as
+ * <code>{ leftMargin: 10, rightMargin: 10 }</code>,
+ * containing name/value pairs for style properties; the object is used
+ * to build a node of the prototype chain for looking up style
properties.
+ *
+ * <p>If this CSSStyleDeclaration is owned by a UIComponent
+ * written in MXML, this function encodes the style attributes
+ * that were specified on the root tag of the component definition.</p>
+ *
+ * <p>If the UIComponent was written in ActionScript,
+ * this property is <code>null</code>.</p>
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+ public function get defaultFactory():Function
+ {
+ return _defaultFactory;
+ }
+
+ /**
+ * @private
+ */
+ public function set defaultFactory(f:Function):void
+ {
+ _defaultFactory = f;
+ }
+
+ //----------------------------------
+ // factory
+ //----------------------------------
+
+ private var _factory:Function;
+
+ [Inspectable(environment="none")]
+
+ /**
+ * This function, if it isn't <code>null</code>,
+ * is usually autogenerated by the MXML compiler.
+ * It produce copies of a plain Object, such as
+ * <code>{ leftMargin: 10, rightMargin: 10 }</code>,
+ * containing name/value pairs for style properties; the object is used
+ * to build a node of the prototype chain for looking up style
properties.
+ *
+ * <p>If this CSSStyleDeclaration is owned by a UIComponent,
+ * this function encodes the style attributes that were specified in MXML
+ * for an instance of that component.</p>
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+ public function get factory():Function
+ {
+ return _factory;
+ }
+
+ /**
+ * @private
+ */
+ public function set factory(f:Function):void
+ {
+ _factory = f;
+ }
+
+ //----------------------------------
+ // overrides
+ //----------------------------------
+
+ private var _overrides:Object;
+
+ /**
+ * If the <code>setStyle()</code> method is called on a UIComponent or
CSSStyleDeclaration
+ * at run time, this object stores the name/value pairs that were set;
+ * they override the name/value pairs in the objects produced by
+ * the methods specified by the <code>defaultFactory</code> and
+ * <code>factory</code> properties.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+ public function get overrides():Object
+ {
+ return _overrides;
+ }
+
+ /**
+ * @private
+ */
+ public function set overrides(o:Object):void
+ {
+ _overrides = o;
+ }
+
+ //----------------------------------
+ // selector
+ //----------------------------------
+
+ private var _selector:CSSSelector;
+
+ /**
+ * This property is the base selector of a potential chain of selectors
+ * and conditions that are used to match CSS style declarations to
+ * components.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 10
+ * @playerversion AIR 1.5
+ * @productversion Flex 4
+ */
+ public function get selector():CSSSelector
+ {
+ return _selector;
+ }
+
+ public function set selector(value:CSSSelector):void
+ {
+ _selector = value;
+ _selectorString = null;
+ }
+
+ //----------------------------------
+ // selectorString
+ //----------------------------------
+
+ private var _selectorString:String;
+
+ /**
+ * Legacy support for setting a Flex 3 styled selector string after
+ * the construction of a style declaration. Only universal class
selectors
+ * or simple type selectors are supported. Note that this style
declaration
+ * is not automatically registered with the StyleManager when using this
+ * API.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 10
+ * @playerversion AIR 1.5
+ * @productversion Flex 4
+ */
+ mx_internal function get selectorString():String
+ {
+ if (_selectorString == null && _selector != null)
+ _selectorString = _selector.toString();
+
+ return _selectorString;
+ }
+
+ mx_internal function set selectorString(value:String):void
+ {
+ // For the legacy API, the first argument is either a simple
+ // type selector or a universal class selector
+ if (value.charAt(0) == ".")
+ {
+ var condition:CSSCondition = new
CSSCondition(CSSConditionKind.CLASS, value.substr(1));
+ _selector = new CSSSelector("", [condition]);
+ }
+ else
+ {
+ _selector = new CSSSelector(value);
+ }
+
+ _selectorString = value;
+ }
+
+ //----------------------------------
+ // specificity
+ //----------------------------------
+
+ /**
+ * Determines the order of precedence when applying multiple style
+ * declarations to a component. If style declarations are of equal
+ * precedence, the last one wins.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 10
+ * @playerversion AIR 1.5
+ * @productversion Flex 4
+ */
+ public function get specificity():int
+ {
+ return _selector ? _selector.specificity : 0;
+ }
+
+ //----------------------------------
+ // subject
+ //----------------------------------
+
+ /**
+ * The subject describes the name of a component that may be a potential
+ * match for this style declaration. The subject is determined as right
+ * most simple type selector in a potential chain of selectors.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 10
+ * @playerversion AIR 1.5
+ * @productversion Flex 4
+ */
+ public function get subject():String
+ {
+ if (_selector != null)
+ {
+ // Check for an implicit universal selector which omits *
+ // for the subject but includes conditions.
+ if (_selector.subject == "" && _selector.conditions)
+ return "*";
+ else
+ return _selector.subject;
+ }
+
+ return null;
+ }
+
+
//--------------------------------------------------------------------------
+ //
+ // Methods
+ //
+
//--------------------------------------------------------------------------
+
+ /**
+ * @private
+ * Determines whether the selector chain for this style declaration makes
+ * use of a pseudo condition.
+ */
+ mx_internal function getPseudoCondition():String
+ {
+ return (selector != null) ? selector.getPseudoCondition() : null;
+ }
+
+ /**
+ * @private
+ * Determines whether this style declaration has an advanced selector.
+ */
+ mx_internal function isAdvanced():Boolean
+ {
+ if (selector != null)
+ {
+ if (selector.ancestor)
+ {
+ return true;
+ }
+ else if (selector.conditions)
+ {
+ if (subject != "*" && subject != "global")
+ {
+ return true;
+ }
+
+ for each (var condition:CSSCondition in selector.conditions)
+ {
+ if (condition.kind != CSSConditionKind.CLASS)
+ {
+ return true;
+ }
+ }
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Determines whether this style declaration applies to the given
component
+ * based on a match of the selector chain.
+ *
+ * @param object The component to match the style declaration against.
+ *
+ * @return true if this style declaration applies to the component,
+ * otherwise false.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 10
+ * @playerversion AIR 1.5
+ * @productversion Flex 4
+ */
+ public function matchesStyleClient(object:IAdvancedStyleClient):Boolean
+ {
+ return (selector != null) ? selector.matchesStyleClient(object) :
false;
+ }
+
+ /**
+ * Determine if the properties of this style declaration are the same as
the the properties of a specified
+ * style declaration.
+ *
+ * @param styleDeclaration the style declaration to compare.
+ *
+ * @return true if the styleDeclaration is considered equal to this
declaration.
+ */
+ mx_internal function equals(styleDeclaration:CSSStyleDeclaration):Boolean
+ {
+ if (styleDeclaration == null)
+ return false;
+
+ // test in order of most likey to be different.
+
+ var obj:Object; // loop variable
+
+ // overrides
+ if (ObjectUtil.compare(overrides, styleDeclaration.overrides) != 0)
+ return false;
+
+ // factory
+ if ((factory == null && styleDeclaration.factory != null) ||
+ (factory != null && styleDeclaration.factory == null))
+ return false;
+
+ if (factory != null)
+ {
+ if (ObjectUtil.compare(new factory(), new
styleDeclaration.factory()) != 0)
+ return false;
+ }
+
+ // defaultFactory
+ if ((defaultFactory == null && styleDeclaration.defaultFactory !=
null) ||
+ (defaultFactory != null && styleDeclaration.defaultFactory ==
null))
+ return false;
+
+ if (defaultFactory != null)
+ {
+ if (ObjectUtil.compare(new defaultFactory(),
+ new styleDeclaration.defaultFactory()) !=
0)
+ return false;
+ }
+
+ // effects
+ if (ObjectUtil.compare(effects,
styleDeclaration.mx_internal::effects))
+ return false;
+
+ return true;
+ }
+
+
+ /**
+ * Gets the value for a specified style property,
+ * as determined solely by this CSSStyleDeclaration.
+ *
+ * <p>The returned value may be of any type.</p>
+ *
+ * <p>The values <code>null</code>, <code>""</code>, <code>false</code>,
+ * <code>NaN</code>, and <code>0</code> are all valid style values,
+ * but the value <code>undefined</code> is not; it indicates that
+ * the specified style is not set on this CSSStyleDeclaration.
+ * You can use the method <code>StyleManager.isValidStyleValue()</code>
+ * to test the value that is returned.</p>
+ *
+ * @param styleProp The name of the style property.
+ *
+ * @return The value of the specified style property if set,
+ * or <code>undefined</code> if not.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+ public function getStyle(styleProp:String):*
+ {
+ var o:*;
+ var v:*;
+
+ // First look in the overrides, in case setStyle()
+ // has been called on this CSSStyleDeclaration.
+ if (overrides)
+ {
+ // If the property exists in our overrides, but
+ // has 'undefined' as its value, it has been
+ // cleared from this stylesheet so return
+ // undefined.
+ if (styleProp in overrides &&
+ overrides[styleProp] === undefined)
+ return undefined;
+
+ v = overrides[styleProp];
+ if (v !== undefined) // must use !==
+ return v;
+ }
+
+ // Next look in the style object that this CSSStyleDeclaration's
+ // factory function produces; it contains styles that
+ // were specified in an instance tag of an MXML component
+ // (if this CSSStyleDeclaration is attached to a UIComponent).
+ if (factory != null)
+ {
+ factory.prototype = {};
+ o = new factory();
+ v = o[styleProp];
+ if (v !== undefined) // must use !==
+ return v;
+ }
+
+ // Next look in the style object that this CSSStyleDeclaration's
+ // defaultFactory function produces; it contains styles that
+ // were specified on the root tag of an MXML component.
+ if (defaultFactory != null)
+ {
+ defaultFactory.prototype = {};
+ o = new defaultFactory();
+ v = o[styleProp];
+ if (v !== undefined) // must use !==
+ return v;
+ }
+
+ // Return undefined if the style isn't specified
+ // in any of these three places.
+ return undefined;
+ }
+
+ /**
+ * Sets a style property on this CSSStyleDeclaration.
+ *
+ * @param styleProp The name of the style property.
+ *
+ * @param newValue The value of the style property.
+ * The value may be of any type.
+ * The values <code>null</code>, <code>""</code>, <code>false</code>,
+ * <code>NaN</code>, and <code>0</code> are all valid style values,
+ * but the value <code>undefined</code> is not.
+ * Setting a style property to the value <code>undefined</code>
+ * is the same as calling the <code>clearStyle()</code> method.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+ public function setStyle(styleProp:String, newValue:*):void
+ {
+ var oldValue:Object = getStyle(styleProp);
+ var regenerate:Boolean = false;
+
+ // If this CSSStyleDeclaration didn't previously have a factory,
+ // defaultFactory, or overrides object, then this CSSStyleDeclaration
+ // hasn't been added to anyone's proto chain. In that case, we
+ // need to regenerate everyone's proto chain.
+ if (selectorRefCount > 0 &&
+ factory == null &&
+ defaultFactory == null &&
+ !overrides &&
+ (oldValue !== newValue)) // must be !==
+ {
+ regenerate = true;
+ }
+
+ if (newValue !== undefined) // must be !==
+ {
+ setLocalStyle(styleProp, newValue);
+ }
+ else
+ {
+ if (newValue == oldValue)
+ return;
+ setLocalStyle(styleProp, newValue);
+ }
+
+ var sms:Array = SystemManagerGlobals.topLevelSystemManagers;
+ var n:int = sms.length;
+ var i:int;
+
+ // Type as Object to avoid dependency on SystemManager.
+ var sm:ISystemManager;
+ var cm:Object;
+
+ if (regenerate)
+ {
+ // Regenerate all the proto chains
+ // for all objects in the application.
+ for (i = 0; i < n; i++)
+ {
+ sm = sms[i];
+ cm =
sm.getImplementation("mx.managers::ISystemManagerChildManager");
+ cm.regenerateStyleCache(true);
+ }
+ }
+
+ for (i = 0; i < n; i++)
+ {
+ sm = sms[i];
+ cm =
sm.getImplementation("mx.managers::ISystemManagerChildManager");
+ cm.notifyStyleChangeInChildren(styleProp, true);
+ }
+ }
+
+ /**
+ * @private
+ * Sets a style property on this CSSStyleDeclaration.
+ *
+ * @param styleProp The name of the style property.
+ *
+ * @param newValue The value of the style property.
+ * The value may be of any type.
+ * The values <code>null</code>, <code>""</code>, <code>false</code>,
+ * <code>NaN</code>, and <code>0</code> are all valid style values,
+ * but the value <code>undefined</code> is not.
+ * Setting a style property to the value <code>undefined</code>
+ * is the same as calling <code>clearStyle()</code>.
+ */
+ mx_internal function setLocalStyle(styleProp:String, value:*):void
+ {
+ var oldValue:Object = getStyle(styleProp);
+
+ // If setting to undefined, clear the style attribute.
+ if (value === undefined) // must use ===
+ {
+ clearStyleAttr(styleProp);
+ return;
+ }
+
+ var o:Object;
+
+ // If the value is a String of the form "#FFFFFF" or "red",
+ // then convert it to a RGB color uint (e.g.: 0xFFFFFF).
+ if (value is String)
+ {
+ if (!styleManager)
+ styleManager =
Singleton.getInstance("mx.styles::IStyleManager2") as IStyleManager2;
+ var colorNumber:Number = styleManager.getColorName(value);
+ if (colorNumber != NOT_A_COLOR)
+ value = colorNumber;
+ }
+
+ // If the new value for styleProp is different from the one returned
+ // from the defaultFactory function, then store the new value on the
+ // overrides object. That way, future clones will get the new value.
+ if (defaultFactory != null)
+ {
+ o = new defaultFactory();
+ if (o[styleProp] !== value) // must use !==
+ {
+ if (!overrides)
+ overrides = {};
+ overrides[styleProp] = value;
+ }
+ else if (overrides)
+ {
+ delete overrides[styleProp];
+ }
+ }
+
+ // If the new value for styleProp is different from the one returned
+ // from the factory function, then store the new value on the
+ // overrides object. That way, future clones will get the new value.
+ if (factory != null)
+ {
+ o = new factory();
+ if (o[styleProp] !== value) // must use !==
+ {
+ if (!overrides)
+ overrides = {};
+ overrides[styleProp] = value;
+ }
+ else if (overrides)
+ {
+ delete overrides[styleProp];
+ }
+ }
+
+ if (defaultFactory == null && factory == null)
+ {
+ if (!overrides)
+ overrides = {};
+ overrides[styleProp] = value;
+ }
+
+ // Update all clones of this style sheet.
+ updateClones(styleProp, value);
+
+ }
+
+ /**
+ * Clears a style property on this CSSStyleDeclaration.
+ *
+ * This is the same as setting the style value to <code>undefined</code>.
+ *
+ * @param styleProp The name of the style property.
+ *
+ * @langversion 3.0
+ * @playerversion Flash 9
+ * @playerversion AIR 1.1
+ * @productversion Flex 3
+ */
+ public function clearStyle(styleProp:String):void
+ {
+ setStyle(styleProp, undefined);
+ }
+
+ /**
+ * @private
+ */
+ mx_internal function createProtoChainRoot():Object
+ {
+ var root:Object = {};
+
+ // If there's a defaultFactory for this style sheet,
+ // then add the object it produces to the root.
+ if (defaultFactory != null)
+ {
+ defaultFactory.prototype = root;
+ root = new defaultFactory();
+ }
+
+ // If there's a factory for this style sheet,
+ // then add the object it produces to the root.
+ if (factory != null)
+ {
+ factory.prototype = root;
+ root = new factory();
+ }
+
+ clones.put(root);
+
+ return root;
+ }
+
+ /**
+ * @private
+ *
+ * The order of nodes in the prototype chain:
+ *
+ * 1. parent style default factories
+ * 2. this default factory
+ * 3. parent style factories
+ * 4. parent style overrides
+ * 5. this factory
+ * 6. this overrides
+ *
+ * Where a parent style is a style with the same selector as this
+ * style but in a parent style manager.
+ *
+ */
+ mx_internal function addStyleToProtoChain(chain:Object,
+ target:DisplayObject,
+ filterMap:Object = null):Object
+ {
+ var nodeAddedToChain:Boolean = false;
+ var originalChain:Object = chain;
+
+ // Get a list of parent style declarations for this selector.
+ var parentStyleDeclarations:Vector.<CSSStyleDeclaration> = new
Vector.<CSSStyleDeclaration>();
+ var styleParent:IStyleManager2 = styleManager.parent;
+ while (styleParent)
+ {
+ var parentStyle:CSSStyleDeclaration =
styleParent.getStyleDeclaration(selectorString);
+ if (parentStyle)
+ parentStyleDeclarations.unshift(parentStyle);
+
+ styleParent = styleParent.parent;
+ }
+
+ // #1. Add parent's default styles. Topmost parent is added to the
chain first.
+ for each (var style:CSSStyleDeclaration in parentStyleDeclarations)
+ {
+ // If there's a defaultFactory for this style sheet,
+ // then add the object it produces to the chain.
+ if (style.defaultFactory != null)
+ chain = style.addDefaultStyleToProtoChain(chain, target,
filterMap);
+ }
+
+ // #2. Add this style's defaultFactory to the proto chain.
+ if (defaultFactory != null)
+ chain = addDefaultStyleToProtoChain(chain, target, filterMap);
+
+ // #3 and #4. Add parent's factory styles and overrides.
+ var addedParentStyleToProtoChain:Boolean = false;
+ for each (style in parentStyleDeclarations)
+ {
+ if (style.factory != null || style.overrides != null)
+ {
+ chain = style.addFactoryAndOverrideStylesToProtoChain(chain,
target, filterMap);
+ addedParentStyleToProtoChain = true;
+ }
+ }
+
+ // #5 and #6. Add this factory style and overrides.
+ var inChain:Object = chain;
+ if (factory != null || overrides != null)
+ {
+ chain = addFactoryAndOverrideStylesToProtoChain(chain, target,
filterMap);
+ if (inChain != chain)
+ nodeAddedToChain = true;
+ }
+
+ // Here we check if we need to add an empty node to the chain for
clone
+ // purposes. If there are parent nodes between this defaultFactory
and
+ // this factory, then we can't use the defaultFactory node as the
clone
+ // since overrides could get blocked by parent styles.
+ // First we check if we have a defaultFactory and we didn't add a
factory
+ // or override node to the chain. If we have a factory or override
node
+ // then we will just use that.
+ if (defaultFactory != null && !nodeAddedToChain)
+ {
+ // Now we know we have a default factory node and no factory or
override
+ // nodes. We can use the default factory as a clone on the chain
if there
+ // are no parent styles below it on the proto chain.
+ // Otherwise create an empty node so overrides and be added later.
+ if (addedParentStyleToProtoChain)
+ {
+ // There are parent styles so create an empty node.
+ emptyObjectFactory.prototype = chain;
+ chain = new emptyObjectFactory();
+ emptyObjectFactory.prototype = null;
+ }
+
+ nodeAddedToChain = true;
+ }
+
+ if (nodeAddedToChain)
+ clones.put(chain);
+
+ return chain;
+ }
+
+ /**
+ * @private
+ */
+ mx_internal function addDefaultStyleToProtoChain(chain:Object,
+ target:DisplayObject,
+ filterMap:Object = null):Object
+ {
+ // If there's a defaultFactory for this style sheet,
+ // then add the object it produces to the chain.
+ if (defaultFactory != null)
+ {
+ var originalChain:Object = chain;
+ if (filterMap)
+ {
+ chain = {};
+ }
+
+ defaultFactory.prototype = chain;
+ chain = new defaultFactory();
+ defaultFactory.prototype = null;
+
+ if (filterMap)
+ chain = applyFilter(originalChain, chain, filterMap);
+ }
+
+ return chain;
+ }
+
+ /**
+ * @private
+ */
+ mx_internal function addFactoryAndOverrideStylesToProtoChain(chain:Object,
+ target:DisplayObject,
+ filterMap:Object =
null):Object
+ {
+ var originalChain:Object = chain;
+ if (filterMap)
+ {
+ chain = {};
+ }
+
+ // If there's a factory for this style sheet,
+ // then add the object it produces to the chain.
+ if (factory != null)
+ {
+ factory.prototype = chain;
+ chain = new factory();
+ factory.prototype = null;
+ }
+
+ // If someone has called setStyle() on this CSSStyleDeclaration,
+ // then some of the values returned from the factory are
+ // out-of-date. Overwrite them with the up-to-date values.
+ if (overrides)
+ {
+ // Before we add our overrides to the object at the head of
+ // the chain, make sure that we added an object at the head
+ // of the chain.
+ if (factory == null)
+ {
+ emptyObjectFactory.prototype = chain;
+ chain = new emptyObjectFactory();
+ emptyObjectFactory.prototype = null;
+ }
+
+ for (var p:String in overrides)
+ {
+ if (overrides[p] === undefined)
+ delete chain[p];
+ else
+ chain[p] = overrides[p];
+ }
+ }
+
+ if (filterMap)
+ {
+ if (factory != null || overrides)
+ chain = applyFilter(originalChain, chain, filterMap);
+ else
+ chain = originalChain;
+ }
+
+ if (factory != null || overrides)
+ clones.put(chain);
+
+ return chain;
+ }
+
+
+ /**
+ * @private
+ */
+ mx_internal function applyFilter(originalChain:Object, chain:Object,
filterMap:Object):Object
+ {
+ var filteredChain:Object = {};
+ // Create an object on the head of the chain using the original chain
+ emptyObjectFactory.prototype = originalChain;
+ filteredChain = new emptyObjectFactory();
+ emptyObjectFactory.prototype = null;
+
+ for (var i:String in chain)
+ {
+ if (filterMap[i] != null)
+ {
+ filteredChain[filterMap[i]] = chain[i];
+ }
+ }
+
+ chain = filteredChain;
+ chain[FILTERMAP_PROP] = filterMap;
+
+ return chain;
+ }
+
+ /**
+ * @private
+ */
+ mx_internal function clearOverride(styleProp:String):void
+ {
+ if (overrides && overrides[styleProp] !== undefined)
+ delete overrides[styleProp];
+ }
+
+ /**
+ * @private
+ */
+ private function clearStyleAttr(styleProp:String):void
+ {
+ // Put "undefined" into our overrides Array
+ if (!overrides)
+ overrides = {};
+ overrides[styleProp] = undefined;
+
+ // Remove the property from all our clones
+ for (var clone:* in clones.iterator)
+ {
+ delete clone[styleProp];
+ }
+ }
+
+ /**
+ * @private
+ */
+ mx_internal function updateClones(styleProp:String, value:*):void
+ {
+ // Update all clones of this style sheet.
+ for (var clone:* in clones.iterator)
+ {
+ var cloneFilter:Object = clone[FILTERMAP_PROP];
+ if (cloneFilter)
+ {
+ if (cloneFilter[styleProp] != null)
+ {
+ clone[cloneFilter[styleProp]] = value;
+ }
+ }
+ else
+ {
+ clone[styleProp] = value;
+ }
+ }
+ }
+
+}
+
+}
- COMPILE::AS3
++COMPILE::SWF
+{
+ import flash.utils.Dictionary;
+}
+
+class CloneManager
+{
- COMPILE::AS3
++ COMPILE::SWF
+ private var clones:Dictionary = new Dictionary(true);
+
+ COMPILE::JS
+ private var array:Array = [];
+
+ public function CloneManager()
+ {
+
+ }
+
+ public function put(o:Object):void
+ {
- COMPILE::AS3
++ COMPILE::SWF
+ {
+ clones[o] = 1;
+ }
+ COMPILE::JS
+ {
+ // leaks memory.
+ // Need to track references
+ // so we can clean up
+ array.push(o);
+ }
+ }
+
+ public function get iterator():Object
+ {
- COMPILE::AS3
++ COMPILE::SWF
+ {
+ return clones;
+ }
+ COMPILE::JS
+ {
+ return array;
+ }
+ }
- }
++}
