Merge pull request #24 from neraliu/get-tag-api

add the api of getCurrentTagIndex and getCurrentTag

Author: neraliu

src/context-parser.js

@@ -332,12 +332,35 @@ FastParser.prototype.afterWalk = function (i, input) {};
 
 /**
  * @function FastParser#getStartTagName
+ * @depreciated Replace it by getCurrentTagIndex and getCurrentTag
  *
  * @returns {string} The current handling start tag name
  *
  */
 FastParser.prototype.getStartTagName = function() {
-    return this.tags[0].toLowerCase();
+    return this.tags[0] !== undefined? this.tags[0].toLowerCase() : undefined;
+};
+
+/**
+ * @function FastParser#getCurrentTagIndex
+ *
+ * @returns {integer} The current handling tag Idx
+ *
+ */
+FastParser.prototype.getCurrentTagIndex = function() {
+    return this.tagIdx;
+};
+
+/**
+ * @function FastParser#getCurrentTag
+ *
+ * @params {integer} The tag Idx
+ *
+ * @returns {string} The current tag name indexed by tag Idx
+ *
+ */
+FastParser.prototype.getCurrentTag = function(tagIdx) {
+    return tagIdx === 0 || tagIdx === 1? (this.tags[tagIdx] !== undefined? this.tags[tagIdx].toLowerCase():undefined) : undefined;
 };
 
 /**

tests/unit/run-functions-spec.js

@@ -216,6 +216,26 @@ Authors: Nera Liu <neraliu@yahoo-inc.com>
 
         });
 
+        describe('#getCurrentTagIndex and #getCurrentTag', function(){
+
+            it('should return correct tag name/index', function(){
+
+                [ { html: "<div class='classname' style='color:red'></div>",            tag0: 'div', tag1: 'div', index: 1},
+                  { html: "<div class='classname' style='color:red'></div>         ",   tag0: 'div', tag1: 'div', index: 1},
+                  { html: "<div class='classname' style='color:red'></div><img>",       tag0: 'img', tag1: 'div', index: 0},
+                  { html: "<div class='classname' style='color:red'></div><img   ",     tag0: 'img', tag1: 'div', index: 0},
+                  { html: "<div class='classname' style='color:red'></div><img></im",   tag0: 'img', tag1: 'im',  index: 1},
+                  { html: "<div class='classname' style='color:red'></div><img></img  ",tag0: 'img', tag1: 'img', index: 1},
+                ].forEach(function(testObj) {
+                    var p1 = new Parser(config);
+                    p1.contextualize(testObj.html);
+                    assert.equal(p1.getCurrentTag(0), testObj.tag0);
+                    assert.equal(p1.getCurrentTag(1), testObj.tag1);
+                    assert.equal(p1.getCurrentTagIndex(), testObj.index);
+                });
+            });
+        });
+
         describe('#Constructor', function(){
 
             it('should support multiple instances', function(){