From 5f67ade998b13797f95ad6ccc2749b7697c8a661 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Tue, 13 Oct 2015 21:24:38 +0100
Subject: Add HTML text and fragment nodes

---
 lib/html/ast.js         | 24 ++++++++++++++++++++++++
 lib/html/index.js       |  4 ++++
 tests/html/ast.tests.js | 14 ++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 lib/html/ast.js
 create mode 100644 lib/html/index.js
 create mode 100644 tests/html/ast.tests.js

diff --git a/lib/html/ast.js b/lib/html/ast.js
new file mode 100644
index 0000000..f5f38da
--- /dev/null
+++ b/lib/html/ast.js
@@ -0,0 +1,24 @@
+var _ = require("underscore");
+
+function fragment(children) {
+    return {
+        type: "fragment",
+        children: collapseFragments(children || [])
+    };
+}
+
+function text(value) {
+    return {
+        type: "text",
+        value: value
+    };
+}
+
+function collapseFragments(elements) {
+    return _.flatten(elements.map(function(element) {
+        return element.type === "fragment" ? element.children : [element];
+    }), true)
+}
+
+exports.fragment = fragment;
+exports.text = text;
diff --git a/lib/html/index.js b/lib/html/index.js
new file mode 100644
index 0000000..5e28f7b
--- /dev/null
+++ b/lib/html/index.js
@@ -0,0 +1,4 @@
+var ast = require("./ast.js");
+
+exports.fragment = ast.fragment;
+exports.text = ast.text;
diff --git a/tests/html/ast.tests.js b/tests/html/ast.tests.js
new file mode 100644
index 0000000..1920e63
--- /dev/null
+++ b/tests/html/ast.tests.js
@@ -0,0 +1,14 @@
+var assert = require("assert");
+
+var test = require("../testing").test;
+var html = require("../../lib/html");
+
+
+describe("HTML ast", function() {
+    test("nested fragments are collapsed", function() {
+        assert.deepEqual(
+            html.fragment([html.fragment([html.text("Hello")])]),
+            html.fragment([html.text("Hello")]));
+    });
+});
+
-- 
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