michael@0: const Ci = Components.interfaces;
michael@0: const Cu = Components.utils;
michael@0: 
michael@0: Cu.import('resource://gre/modules/XPCOMUtils.jsm');
michael@0: 
michael@0: this.EXPORTED_SYMBOLS = ['Roles', 'Events', 'Relations',
michael@0:                          'Filters', 'States', 'Prefilters'];
michael@0: 
michael@0: function ConstantsMap (aObject, aPrefix, aMap = {}, aModifier = null) {
michael@0:   let offset = aPrefix.length;
michael@0:   for (var name in aObject) {
michael@0:     if (name.indexOf(aPrefix) === 0) {
michael@0:       aMap[name.slice(offset)] = aModifier ?
michael@0:         aModifier(aObject[name]) : aObject[name];
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return aMap;
michael@0: }
michael@0: 
michael@0: XPCOMUtils.defineLazyGetter(
michael@0:   this, 'Roles',
michael@0:   function() {
michael@0:     return ConstantsMap(Ci.nsIAccessibleRole, 'ROLE_');
michael@0:   });
michael@0: 
michael@0: XPCOMUtils.defineLazyGetter(
michael@0:   this, 'Events',
michael@0:   function() {
michael@0:     return ConstantsMap(Ci.nsIAccessibleEvent, 'EVENT_');
michael@0:   });
michael@0: 
michael@0: XPCOMUtils.defineLazyGetter(
michael@0:   this, 'Relations',
michael@0:   function() {
michael@0:     return ConstantsMap(Ci.nsIAccessibleRelation, 'RELATION_');
michael@0:   });
michael@0: 
michael@0: XPCOMUtils.defineLazyGetter(
michael@0:   this, 'Prefilters',
michael@0:   function() {
michael@0:     return ConstantsMap(Ci.nsIAccessibleTraversalRule, 'PREFILTER_');
michael@0:   });
michael@0: 
michael@0: XPCOMUtils.defineLazyGetter(
michael@0:   this, 'Filters',
michael@0:   function() {
michael@0:     return ConstantsMap(Ci.nsIAccessibleTraversalRule, 'FILTER_');
michael@0:   });
michael@0: 
michael@0: XPCOMUtils.defineLazyGetter(
michael@0:   this, 'States',
michael@0:   function() {
michael@0:     let statesMap = ConstantsMap(Ci.nsIAccessibleStates, 'STATE_', {},
michael@0:                                  (val) => { return { base: val, extended: 0 }; });
michael@0:     ConstantsMap(Ci.nsIAccessibleStates, 'EXT_STATE_', statesMap,
michael@0:                  (val) => { return { base: 0, extended: val }; });
michael@0:     return statesMap;
michael@0:   });