1 files changed, 52 insertions, 0 deletions
diff --git a/bin/lib/less/tree/element.js b/bin/lib/less/tree/element.js
new file mode 100644
index 00000000..14b08d2e
--- /dev/null
+++ b/bin/lib/less/tree/element.js
@@ -0,0 +1,52 @@
+(function (tree) {
+
+tree.Element = function (combinator, value, index) {
+    this.combinator = combinator instanceof tree.Combinator ?
+                      combinator : new(tree.Combinator)(combinator);
+
+    if (typeof(value) === 'string') {
+        this.value = value.trim();
+    } else if (value) {
+        this.value = value;
+    } else {
+        this.value = "";
+    }
+    this.index = index;
+};
+tree.Element.prototype.eval = function (env) {
+    return new(tree.Element)(this.combinator,
+                             this.value.eval ? this.value.eval(env) : this.value,
+                             this.index);
+};
+tree.Element.prototype.toCSS = function (env) {
+	var value = (this.value.toCSS ? this.value.toCSS(env) : this.value);
+	if (value == '' && this.combinator.value.charAt(0) == '&') {
+		return '';
+	} else {
+		return this.combinator.toCSS(env || {}) + value;
+	}
+};
+
+tree.Combinator = function (value) {
+    if (value === ' ') {
+        this.value = ' ';
+    } else if (value === '& ') {
+        this.value = '& ';
+    } else {
+        this.value = value ? value.trim() : "";
+    }
+};
+tree.Combinator.prototype.toCSS = function (env) {
+    return {
+        ''  : '',
+        ' ' : ' ',
+        '&' : '',
+        '& ' : ' ',
+        ':' : ' :',
+        '+' : env.compress ? '+' : ' + ',
+        '~' : env.compress ? '~' : ' ~ ',
+        '>' : env.compress ? '>' : ' > '
+    }[this.value];
+};
+
+})(require('../tree'));