Update tags for multiple pads at once

www/common/common-ui-elements.js

@@ -46,28 +46,69 @@ define([
         return mB + Messages.MB;
     };
 
-    UIElements.updateTags = function (common, href) {
+    UIElements.updateTags = function (common, hrefs) {
         var existing, tags;
+        var allTags = {};
+        if (!hrefs || typeof (hrefs) === "string") {
+            hrefs = [hrefs];
+        }
         NThen(function(waitFor) {
             common.getSframeChannel().query("Q_GET_ALL_TAGS", null, waitFor(function(err, res) {
                 if (err || res.error) { return void console.error(err || res.error); }
                 existing = Object.keys(res.tags).sort();
             }));
         }).nThen(function (waitFor) {
+            var _err;
+            hrefs.forEach(function (href) {
                 common.getPadAttribute('tags', waitFor(function (err, res) {
                     if (err) {
                         if (err === 'NO_ENTRY') {
                             UI.alert(Messages.tags_noentry);
                         }
                         waitFor.abort();
+                        _err = err;
                         return void console.error(err);
                     }
+                    allTags[href] = res || [];
+
+                    if (tags) {
+                        // Intersect with tags from previous pads
+                        tags = (res || []).filter(function (tag) {
+                            return tags.indexOf(tag) !== -1;
+                        });
+                    } else {
                         tags = res || [];
+                    }
                 }), href);
+            });
         }).nThen(function () {
             UI.dialog.tagPrompt(tags, existing, function (newTags) {
                 if (!Array.isArray(newTags)) { return; }
-                common.setPadAttribute('tags', newTags, null, href);
+                var added = [];
+                var removed = [];
+                newTags.forEach(function (tag) {
+                    if (tags.indexOf(tag) === -1) {
+                        added.push(tag);
+                    }
+                });
+                tags.forEach(function (tag) {
+                    if (newTags.indexOf(tag) === -1) {
+                        removed.push(tag);
+                    }
+                });
+                var update = function (oldTags) {
+                    Array.prototype.push.apply(oldTags, added);
+                    removed.forEach(function (tag) {
+                        var idx = oldTags.indexOf(tag);
+                        oldTags.splice(idx, 1);
+                    });
+                };
+
+                hrefs.forEach(function (href) {
+                    var oldTags = allTags[href] || [];
+                    update(oldTags);
+                    common.setPadAttribute('tags', Util.deduplicateString(oldTags), null, href);
+                });
             });
         });
     };

www/common/drive-ui.js

@@ -1294,7 +1294,6 @@ define([
                     hide.push('properties', 'access');
                     hide.push('rename');
                     hide.push('openparent');
-                    hide.push('hashtag');
                     hide.push('download');
                     hide.push('share');
                     hide.push('savelocal');
@@ -4370,12 +4369,12 @@ define([
                 });
             }
             else if ($this.hasClass("cp-app-drive-context-hashtag")) {
-                if (paths.length !== 1) { return; }
-                el = manager.find(paths[0].path);
-                data = manager.getFileData(el);
-                if (!data) { return void console.error("Expected to find a file"); }
-                var href = data.href || data.roHref;
-                common.updateTags(href);
+                var hrefs = paths.map(function (p) {
+                    var el = manager.find(p.path);
+                    var data =  manager.getFileData(el);
+                    return data.href || data.roHref;
+                }).filter(Boolean);
+                common.updateTags(hrefs);
             }
             else if ($this.hasClass("cp-app-drive-context-empty")) {
                 if (paths.length !== 1 || !paths[0].element