source: Dev/trunk/src/client/dojox/data/css.js

define(["dojo/_base/lang", "dojo/_base/array"], 
  function(lang, array) {

var css = lang.getObject("dojox.data.css",true) 

css.rules = {};

css.rules.forEach = function(fn,ctx,context){
        if(context){
                var _processSS = function(styleSheet){
                        //iterate across rules in the stylesheet
                        array.forEach(styleSheet[styleSheet.cssRules?"cssRules":"rules"], function(rule){
                                if(!rule.type || rule.type !== 3){// apply fn to current rule with approp ctx. rule is arg (all browsers)
                                        var href = "";
                                        if(styleSheet && styleSheet.href){
                                                href = styleSheet.href;
                                        }
                                        fn.call(ctx?ctx:this,rule, styleSheet, href);
                                }
                        });
                        //process any child stylesheets
                };
                array.forEach(context,_processSS);
        }
};

css.findStyleSheets = function(sheets){
        // Takes an array of stylesheet paths and finds the currently loaded StyleSheet objects matching
        // those names
        var sheetObjects = [];
        var _processSS = function(styleSheet){
                var s = css.findStyleSheet(styleSheet);
                if(s){
                        array.forEach(s, function(sheet){
                                if(array.indexOf(sheetObjects, sheet) === -1){
                                        sheetObjects.push(sheet);
                                }
                        });
                }
        };
        array.forEach(sheets, _processSS);
        return sheetObjects;
};

css.findStyleSheet = function(sheet){
        // Takes a stylesheet path and finds the currently loaded StyleSheet objects matching
        // those names (and it's parent(s), if it is imported from another)
        var sheetObjects = [];
        if(sheet.charAt(0) === '.'){
                sheet = sheet.substring(1);
        }
        var _processSS = function(styleSheet){
                if(styleSheet.href && styleSheet.href.match(sheet)){
                        sheetObjects.push(styleSheet);
                        return true;
                }
                if(styleSheet.imports){
                        return array.some(styleSheet.imports, function(importedSS){ //IE stylesheet has imports[] containing @import'ed rules
                                //console.debug("Processing IE @import rule",importedSS);
                                return _processSS(importedSS);
                        });
                }
                //iterate across rules in the stylesheet
                return array.some(styleSheet[styleSheet.cssRules?"cssRules":"rules"], function(rule){
                        if(rule.type && rule.type === 3 && _processSS(rule.styleSheet)){// CSSImportRule (firefox)
                                //sheetObjects.push(styleSheet);
                                return true;
                        }
                        return false;
                });
        };
        array.some(document.styleSheets, _processSS);
        return sheetObjects;
};

css.determineContext = function(initialStylesheets){
        // Takes an array of stylesheet paths and returns an array of all stylesheets that fall in the
        // given context.  If no paths are given, all stylesheets are returned.
        var ret = [];
        if(initialStylesheets && initialStylesheets.length > 0){
                initialStylesheets = css.findStyleSheets(initialStylesheets);
        }else{
                initialStylesheets = document.styleSheets;
        }
        var _processSS = function(styleSheet){
                ret.push(styleSheet);
                if(styleSheet.imports){
                        array.forEach(styleSheet.imports, function(importedSS){ //IE stylesheet has imports[] containing @import'ed rules
                                //console.debug("Processing IE @import rule",importedSS);
                                _processSS(importedSS);
                        });
                }
                //iterate across rules in the stylesheet
                array.forEach(styleSheet[styleSheet.cssRules?"cssRules":"rules"], function(rule){
                        if(rule.type && rule.type === 3){// CSSImportRule (firefox)
                                _processSS(rule.styleSheet);
                        }
                });
        };
        array.forEach(initialStylesheets,_processSS);
        return ret;
};

return css;

});