+package net.systemeD.halcyon.styleparser {
+
+ import net.systemeD.halcyon.connection.*;
+
+ /** A descendant list of MapCSS selectors (Rules).
+
+ For example,
+ relation[type=route] way[highway=primary]
+ ^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^
+ first Rule second Rule
+ |------------|---------|
+ |
+ one RuleChain
+
+ */
+
+ public class RuleChain {
+ public var rules:Array=[]; // should eventually become a Vector of Rules
+ public var subpart:String=''; // subpart name, as in way[highway=primary]::centreline
+
+ // Test a ruleChain
+ // - run a set of tests in the chain
+ // works backwards from at position "pos" in array, or -1 for the last
+ // separate tags object is required in case they've been dynamically retagged
+ // - if they fail, return false
+ // - if they succeed, and it's the last in the chain, return happily
+ // - if they succeed, and there's more in the chain, rerun this for each parent until success
+
+ public function test(pos:int, obj:Entity, tags:Object, zoom:uint):Boolean {
+ if (pos==-1) { pos=rules.length-1; }
+
+ var r:Rule=rules[pos];
+ if (!r.test(obj, tags, zoom)) { return false; }
+ if (pos==0) { return true; }
+
+ var o:Array=obj.parentObjects;
+ for each (var p:Entity in o) {
+ if (test(pos-1, p, p.getTagsHash(), zoom)) { return true; }
+ }
+ return false;
+ }
+
+ public function get length():int {
+ return rules.length;
+ }
+
+ // ---------------------------------------------------------------------------------------------
+ // Methods to add properties (used by parsers such as MapCSS)
+
+ public function addRule(e:String=''):void {
+ rules.push(new Rule(e));
+ }
+
+ public function addConditionToLast(c:Condition):void {
+ rules[rules.length-1].conditions.push(c);
+ }
+
+ public function addZoomToLast(z1:uint,z2:uint):void {
+ rules[rules.length-1].minZoom=z1;
+ rules[rules.length-1].maxZoom=z2;
+ }
+
+
+ }
+}
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