Port indentation code from js2-mode to js-mode

* lisp/progmodes/js.el (js-auto-indent-flag): Remove, was unused.
(js-switch-indent-offset): New option.
(js--proper-indentation): Use it.  And handle the case when
"default" is actually a key in an object literal.
(js--same-line): New function.
(js--multi-line-declaration-indentation): Use it.
(js--indent-in-array-comp, js--array-comp-indentation): New
functions.
(js--proper-indentation): Use them, to handle array comprehension
continuations.

1 files changed, 45 insertions, 0 deletions

diff --git a/test/indent/js.js b/test/indent/js.js
new file mode 100644
index 00000000000..d4167da3e96
--- /dev/null
+++ b/test/indent/js.js
@@ -0,0 +1,45 @@
+var a = 1;
+b = 2;
+
+let c = 1,
+    d = 2;
+
+var e = 100500,
+    + 1;
+
+var f = bar('/protocols/')
+baz();
+
+var h = 100500
+1;
+
+const i = 1,
+      j = 2;
+
+var k = 1,
+    l = [
+      1, 2,
+      3, 4
+    ],
+    m = 5;
+
+var n = function() {
+  return 7;
+},
+    o = 8;
+
+foo(bar, function() {
+  return 2;
+});
+
+switch (b) {
+case "a":
+  2;
+default:
+  3;
+}
+
+var ;
+
+var evens = [e for each (e in range(0, 21))
+               if (ed % 2 == 0)];