[xml-hint addon] Support attributes that apply to all tags

Author: marijnh

addon/hint/xml-hint.js

@@ -39,7 +39,16 @@
     } else {
       // Attribute completion
       var curTag = tags[inner.state.tagName], attrs = curTag && curTag.attrs;
-      if (!attrs) return;
+      var globalAttrs = tags["!attrs"];
+      if (!attrs && !globalAttrs) return;
+      if (!attrs) {
+        attrs = globalAttrs;
+      } else if (globalAttrs) { // Combine tag-local and global attributes
+        var set = {};
+        for (var nm in globalAttrs) if (globalAttrs.hasOwnProperty(nm)) set[nm] = globalAttrs[nm];
+        for (var nm in attrs) if (attrs.hasOwnProperty(nm)) set[nm] = attrs[nm];
+        attrs = set;
+      }
       if (token.type == "string" || token.string == "=") { // A value
         var before = cm.getRange(Pos(cur.line, Math.max(0, cur.ch - 60)),
                                  Pos(cur.line, token.type == "string" ? token.start : token.end));

demo/xmlcomplete.html

@@ -52,6 +52,10 @@ <h2>XML Autocomplete Demo</h2>
 
       var tags = {
         "!top": ["top"],
+        "!attrs": {
+          id: null,
+          class: ["A", "B", "C"]
+        },
         top: {
           attrs: {
             lang: ["en", "de", "fr", "nl"],