Support show last change user with profile and support YAML config inside the note with robots, lang, dir, breaks options

18 files changed, 546 insertions, 167 deletions

diff --git a/bower.json b/bower.json
index da93a2a5..a90aec00 100644
--- a/bower.json
+++ b/bower.json
@@ -29,6 +29,7 @@
     "handlebars": "~4.0.5",
     "js-url": "~2.0.2",
     "socket.io-client": "~1.3.7",
-    "viz.js": "~1.3.0"
+    "viz.js": "~1.3.0",
+    "js-yaml": "~3.4.6"
   }
 }
diff --git a/lib/note.js b/lib/note.js
index dc384b7f..671e5383 100644
--- a/lib/note.js
+++ b/lib/note.js
@@ -26,6 +26,10 @@ var model = mongoose.model('note', {
         type: String,
         enum: permissionTypes
     },
+    lastchangeuser: {
+        type: Schema.Types.ObjectId,
+        ref: 'user'
+    },
     viewcount: {
         type: Number,
         default: 0
@@ -45,7 +49,8 @@ var note = {
     getNoteTitle: getNoteTitle,
     generateWebTitle: generateWebTitle,
     increaseViewCount: increaseViewCount,
-    updatePermission: updatePermission
+    updatePermission: updatePermission,
+    updateLastChangeUser: updateLastChangeUser
 };
 
 function checkNoteIdValid(noteId) {
@@ -198,4 +203,18 @@ function updatePermission(note, permission, callback) {
     });
 }
 
+function updateLastChangeUser(note, lastchangeuser, callback) {
+    note.lastchangeuser = lastchangeuser;
+    note.updated = Date.now();
+    note.save(function (err) {
+        if (err) {
+            logger.error('update note lastchangeuser failed: ' + err);
+            callback(err, null);
+        } else {
+            logger.info("update note lastchangeuser success: " + note.id);
+            callback(null, note);
+        };
+    });
+}
+
 module.exports = note;
\ No newline at end of file
diff --git a/lib/realtime.js b/lib/realtime.js
index a9c541cf..484ef12e 100644
--- a/lib/realtime.js
+++ b/lib/realtime.js
@@ -9,7 +9,6 @@ var shortId = require('shortid');
 var randomcolor = require("randomcolor");
 var Chance = require('chance'),
     chance = new Chance();
-var md5 = require("blueimp-md5").md5;
 var moment = require('moment');
 
 //core
@@ -68,7 +67,9 @@ function secure(socket, next) {
 
 function emitCheck(note) {
     var out = {
-        updatetime: note.updatetime
+        updatetime: note.updatetime,
+        lastchangeuser: note.lastchangeuser,
+        lastchangeuserprofile: note.lastchangeuserprofile
     };
     realtime.io.to(note.id).emit('check', out);
     /*
@@ -89,18 +90,52 @@ var updater = setInterval(function () {
         if (note.server.isDirty) {
             if (config.debug)
                 logger.info("updater found dirty note: " + key);
-            var body = note.server.document;
-            var title = Note.getNoteTitle(body);
-            title = LZString.compressToBase64(title);
-            body = LZString.compressToBase64(body);
-            db.saveToDB(key, title, body, function (err, result) {
-                if (err) return;
-                note.server.isDirty = false;
-                note.updatetime = Date.now();
-                emitCheck(note);
+            Note.findNote(note.id, function (err, _note) {
+                if (err || !_note) return callback(err, null);
+                //mongo update
+                if (note.lastchangeuser && _note.lastchangeuser != note.lastchangeuser) {
+                    var lastchangeuser = note.lastchangeuser;
+                    var lastchangeuserprofile = null;
+                    User.findUser(lastchangeuser, function (err, user) {
+                        if (err) return callback(err, null);
+                        if (user && user.profile) {
+                            var profile = JSON.parse(user.profile);
+                            if (profile) {
+                                lastchangeuserprofile = {
+                                    name: profile.displayName || profile.username,
+                                    photo: User.parsePhotoByProfile(profile)
+                                }
+                                note.lastchangeuser = lastchangeuser;
+                                note.lastchangeuserprofile = lastchangeuserprofile;
+                                Note.updateLastChangeUser(_note, lastchangeuser, function (err, result) {
+                                    if (err) return callback(err, null);
+                                });
+                            }
+                        }
+                    });
+                } else {
+                    note.lastchangeuser = null;
+                    note.lastchangeuserprofile = null;
+                    Note.updateLastChangeUser(_note, null, function (err, result) {
+                        if (err) return callback(err, null);
+                    });
+                }
+                //postgres update
+                var body = note.server.document;
+                var title = Note.getNoteTitle(body);
+                title = LZString.compressToBase64(title);
+                body = LZString.compressToBase64(body);
+                db.saveToDB(key, title, body, function (err, result) {
+                    if (err) return callback(err, null);
+                    note.server.isDirty = false;
+                    note.updatetime = Date.now();
+                    emitCheck(note);
+                    callback(null, null);
+                });
             });
+        } else {
+            callback(null, null);
         }
-        callback();
     }, function (err) {
         if (err) return logger.error('updater error', err);
     });
@@ -121,7 +156,7 @@ var cleaner = setInterval(function () {
             disconnectSocketQueue.push(socket);
             disconnect(socket);
         }
-        callback();
+        callback(null, null);
     }, function (err) {
         if (err) return logger.error('cleaner error', err);
     });
@@ -250,7 +285,11 @@ function emitRefresh(socket) {
     socket.emit('refresh', {
         docmaxlength: config.documentmaxlength,
         owner: note.owner,
+        ownerprofile: note.ownerprofile,
+        lastchangeuser: note.lastchangeuser,
+        lastchangeuserprofile: note.lastchangeuserprofile,
         permission: note.permission,
+        createtime: note.createtime,
         updatetime: note.updatetime
     });
 }
@@ -321,11 +360,15 @@ function startConnection(socket) {
                 isConnectionBusy = false;
                 return logger.error(err);
             }
+
             var owner = data.rows[0].owner;
+            var ownerprofile = null;
             var permission = "freely";
             if (owner && owner != "null") {
                 permission = "editable";
             }
+
+            //find or new note
             Note.findOrNewNote(notename, permission, function (err, note) {
                 if (err) {
                     responseError(res, "404", "Not Found", "oops.");
@@ -333,20 +376,64 @@ function startConnection(socket) {
 					isConnectionBusy = false;
                     return;
                 }
+
                 var body = LZString.decompressFromBase64(data.rows[0].content);
                 //body = LZString.compressToUTF16(body);
+                var createtime = data.rows[0].create_time;
                 var updatetime = data.rows[0].update_time;
                 var server = new ot.EditorSocketIOServer(body, [], notename, ifMayEdit);
+
+                var lastchangeuser = note.lastchangeuser || null;
+                var lastchangeuserprofile = null;
+
                 notes[notename] = {
                     id: notename,
                     owner: owner,
+                    ownerprofile: ownerprofile,
                     permission: note.permission,
+                    lastchangeuser: lastchangeuser,
+                    lastchangeuserprofile: lastchangeuserprofile,
                     socks: [],
                     users: {},
+                    createtime: moment(createtime).valueOf(),
                     updatetime: moment(updatetime).valueOf(),
                     server: server
                 };
-                finishConnection(socket, notes[notename], users[socket.id]);
+
+                if (lastchangeuser) {
+                    //find last change user profile if lastchangeuser exists
+                    User.findUser(lastchangeuser, function (err, user) {
+                        if (!err && user && user.profile) {
+                            var profile = JSON.parse(user.profile);
+                            if (profile) {
+                                lastchangeuserprofile = {
+                                    name: profile.displayName || profile.username,
+                                    photo: User.parsePhotoByProfile(profile)
+                                }
+                                notes[notename].lastchangeuserprofile = lastchangeuserprofile;
+                            }
+                        }
+                    });
+                }
+
+                if (owner && owner != "null") {
+                    //find owner profile if owner exists
+                    User.findUser(owner, function (err, user) {
+                        if (!err && user && user.profile) {
+                            var profile = JSON.parse(user.profile);
+                            if (profile) {
+                                ownerprofile = {
+                                    name: profile.displayName || profile.username,
+                                    photo: User.parsePhotoByProfile(profile)
+                                }
+                                notes[notename].ownerprofile = ownerprofile;
+                            }
+                        }
+                        finishConnection(socket, notes[notename], users[socket.id]);
+                    });
+                } else {
+                    finishConnection(socket, notes[notename], users[socket.id]);
+                }
             });
         });
     } else {
@@ -433,23 +520,7 @@ function updateUserData(socket, user) {
     //retrieve user data from passport
     if (socket.request.user && socket.request.user.logged_in) {
         var profile = JSON.parse(socket.request.user.profile);
-        var photo = null;
-        switch (profile.provider) {
-        case "facebook":
-            photo = 'https://graph.facebook.com/' + profile.id + '/picture';
-            break;
-        case "twitter":
-            photo = profile.photos[0].value;
-            break;
-        case "github":
-            photo = 'https://avatars.githubusercontent.com/u/' + profile.id + '?s=48';
-            break;
-        case "dropbox":
-            //no image api provided, use gravatar
-            photo = 'https://www.gravatar.com/avatar/' + md5(profile.emails[0].value);
-            break;
-        }
-        user.photo = photo;
+        user.photo = User.parsePhotoByProfile(profile);
         user.name = profile.displayName || profile.username;
         user.userid = socket.request.user._id;
         user.login = true;
@@ -466,19 +537,28 @@ function ifMayEdit(socket, callback) {
     var note = notes[notename];
     var mayEdit = true;
     switch (note.permission) {
-    case "freely":
-        //not blocking anyone
-        break;
-    case "editable":
-        //only login user can change
-        if (!socket.request.user || !socket.request.user.logged_in)
-            mayEdit = false;
-        break;
-    case "locked":
-        //only owner can change
-        if (note.owner != socket.request.user._id)
-            mayEdit = false;
-        break;
+        case "freely":
+            //not blocking anyone
+            break;
+        case "editable":
+            //only login user can change
+            if (!socket.request.user || !socket.request.user.logged_in)
+                mayEdit = false;
+            break;
+        case "locked":
+            //only owner can change
+            if (note.owner != socket.request.user._id)
+                mayEdit = false;
+            break;
+    }
+    //if user may edit and this note have owner (not anonymous usage)
+    if (mayEdit && note.owner && note.owner != "null") {
+        //save for the last change user id
+		if (socket.request.user && socket.request.user.logged_in) {
+        	note.lastchangeuser = socket.request.user._id;
+		} else {
+			note.lastchangeuser = null;
+		}
     }
     callback(mayEdit);
 }
diff --git a/lib/response.js b/lib/response.js
index 6a180f2b..a30df470 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -8,6 +8,7 @@ var markdownpdf = require("markdown-pdf");
 var LZString = require('lz-string');
 var S = require('string');
 var shortId = require('shortid');
+var metaMarked = require('meta-marked');
 
 //core
 var config = require("../config.js");
@@ -15,6 +16,7 @@ var config = require("../config.js");
 //others
 var db = require("./db.js");
 var Note = require("./note.js");
+var User = require("./user.js");
 
 //slides
 var md = require('reveal.js/plugin/markdown/markdown');
@@ -104,6 +106,13 @@ function responseHackMD(res, noteId) {
             responseError(res, "404", "Not Found", "oops.");
             return;
         }
+        var body = LZString.decompressFromBase64(data.rows[0].content);
+        var meta = null;
+        try {
+            meta = metaMarked(body).meta;
+        } catch(err) {
+            //na
+        }
         var title = data.rows[0].title;
         var decodedTitle = LZString.decompressFromBase64(title);
         if (decodedTitle) title = decodedTitle;
@@ -116,7 +125,8 @@ function responseHackMD(res, noteId) {
         var compiled = ejs.compile(fs.readFileSync(template, 'utf8'), options);
         var html = compiled({
             title: title,
-            useCDN: config.usecdn
+			useCDN: config.usecdn,
+            robots: (meta && meta.robots) || false //default allow robots
         });
         var buf = html;
         res.writeHead(200, {
@@ -192,34 +202,47 @@ function showPublishNote(req, res, next) {
                         return;
                     }
                     var body = LZString.decompressFromBase64(data.rows[0].content);
+                    var meta = null;
+                    try {
+                        meta = metaMarked(body).meta;
+                    } catch(err) {
+                        //na
+                    }
                     var updatetime = data.rows[0].update_time;
                     var text = S(body).escapeHTML().s;
                     var title = data.rows[0].title;
                     var decodedTitle = LZString.decompressFromBase64(title);
                     if (decodedTitle) title = decodedTitle;
                     title = Note.generateWebTitle(title);
-                    var template = config.prettypath;
-                    var options = {
-                        cache: !config.debug,
-                        filename: template
-                    };
-                    var compiled = ejs.compile(fs.readFileSync(template, 'utf8'), options);
                     var origin = config.getserverurl();
-                    var html = compiled({
+                    var data = {
                         title: title,
                         viewcount: note.viewcount,
                         updatetime: updatetime,
                         url: origin,
                         body: text,
-                        useCDN: config.usecdn
-                    });
-                    var buf = html;
-                    res.writeHead(200, {
-                        'Content-Type': 'text/html; charset=UTF-8',
-                        'Cache-Control': 'private',
-                        'Content-Length': buf.length
-                    });
-                    res.end(buf);
+                        useCDN: config.usecdn,
+                        lastchangeuserprofile: null,
+                        robots: (meta && meta.robots) || false //default allow robots
+                    };
+                    if (note.lastchangeuser) {
+                        //find last change user profile if lastchangeuser exists
+                        User.findUser(note.lastchangeuser, function (err, user) {
+                            if (!err && user && user.profile) {
+                                var profile = JSON.parse(user.profile);
+                                if (profile) {
+                                    data.lastchangeuserprofile = {
+                                        name: profile.displayName || profile.username,
+                                        photo: User.parsePhotoByProfile(profile)
+                                    }
+                                    renderPublish(data, res);
+                                }
+                            }
+                        });
+                    } else {
+                        renderPublish(data, res);
+                    }
+                    
                 });
             });
         });
@@ -228,6 +251,23 @@ function showPublishNote(req, res, next) {
     }
 }
 
+function renderPublish(data, res) {
+    var template = config.prettypath;
+    var options = {
+        cache: !config.debug,
+        filename: template
+    };
+    var compiled = ejs.compile(fs.readFileSync(template, 'utf8'), options);
+    var html = compiled(data);
+    var buf = html;
+    res.writeHead(200, {
+        'Content-Type': 'text/html; charset=UTF-8',
+        'Cache-Control': 'private',
+        'Content-Length': buf.length
+    });
+    res.end(buf);
+}
+
 function actionPublish(req, res, noteId) {
     db.readFromDB(noteId, function (err, data) {
         if (err) {
@@ -269,36 +309,6 @@ function actionSlide(req, res, noteId) {
         });
     });
 }
-//pretty api is deprecated
-function actionPretty(req, res, noteId) {
-    db.readFromDB(noteId, function (err, data) {
-        if (err) {
-            responseError(res, "404", "Not Found", "oops.");
-            return;
-        }
-        var body = LZString.decompressFromBase64(data.rows[0].content);
-        var text = S(body).escapeHTML().s;
-        var title = data.rows[0].title;
-        var decodedTitle = LZString.decompressFromBase64(title);
-        if (decodedTitle) title = decodedTitle;
-        title = Note.generateWebTitle(title);
-        var template = config.prettypath;
-        var compiled = ejs.compile(fs.readFileSync(template, 'utf8'));
-        var origin = config.getserverurl();
-        var html = compiled({
-            title: title,
-            url: origin,
-            body: text
-        });
-        var buf = html;
-        res.writeHead(200, {
-            'Content-Type': 'text/html; charset=UTF-8',
-            'Cache-Control': 'private',
-            'Content-Length': buf.length
-        });
-        res.end(buf);
-    });
-}
 
 function actionDownload(req, res, noteId) {
     db.readFromDB(noteId, function (err, data) {
@@ -325,6 +335,11 @@ function actionPDF(req, res, noteId) {
             return;
         }
         var body = LZString.decompressFromBase64(data.rows[0].content);
+        try {
+            body = metaMarked(body).markdown;
+        } catch(err) {
+            //na
+        }
         var title = Note.getNoteTitle(body);
 
         if (!fs.existsSync(config.tmppath)) {
@@ -361,46 +376,46 @@ function noteActions(req, res, next) {
     }
     var action = req.params.action;
     switch (action) {
-        case "publish":
-        case "pretty": //pretty deprecated
-            actionPublish(req, res, noteId);
-            break;
-        case "slide":
-            actionSlide(req, res, noteId);
-            break;
-        case "download":
-            actionDownload(req, res, noteId);
-            break;
-        case "pdf":
-            actionPDF(req, res, noteId);
-            break;
-        default:
-            if (noteId != config.featuresnotename)
-                res.redirect('/' + LZString.compressToBase64(noteId));
-            else
-                res.redirect('/' + noteId);
-            break;
+    case "publish":
+    case "pretty": //pretty deprecated
+        actionPublish(req, res, noteId);
+        break;
+    case "slide":
+        actionSlide(req, res, noteId);
+        break;
+    case "download":
+        actionDownload(req, res, noteId);
+        break;
+    case "pdf":
+        actionPDF(req, res, noteId);
+        break;
+    default:
+        if (noteId != config.featuresnotename)
+            res.redirect('/' + LZString.compressToBase64(noteId));
+        else
+            res.redirect('/' + noteId);
+        break;
     }
 }
 
 function publishNoteActions(req, res, next) {
     var action = req.params.action;
     switch (action) {
-        case "edit":
-            var shortid = req.params.shortid;
-            if (shortId.isValid(shortid)) {
-                Note.findNote(shortid, function (err, note) {
-                    if (err || !note) {
-                        responseError(res, "404", "Not Found", "oops.");
-                        return;
-                    }
-                    if (note.id != config.featuresnotename)
-                        res.redirect('/' + LZString.compressToBase64(note.id));
-                    else
-                        res.redirect('/' + note.id);
-                });
-            }
-            break;
+    case "edit":
+        var shortid = req.params.shortid;
+        if (shortId.isValid(shortid)) {
+            Note.findNote(shortid, function (err, note) {
+                if (err || !note) {
+                    responseError(res, "404", "Not Found", "oops.");
+                    return;
+                }
+                if (note.id != config.featuresnotename)
+                    res.redirect('/' + LZString.compressToBase64(note.id));
+                else
+                    res.redirect('/' + note.id);
+            });
+        }
+        break;
     }
 }
 
@@ -424,6 +439,11 @@ function showPublishSlide(req, res, next) {
                         return;
                     }
                     var body = LZString.decompressFromBase64(data.rows[0].content);
+                    try {
+                        body = metaMarked(body).markdown;
+                    } catch(err) {
+                        //na
+                    }
                     var title = data.rows[0].title;
                     var decodedTitle = LZString.decompressFromBase64(title);
                     if (decodedTitle) title = decodedTitle;
diff --git a/lib/user.js b/lib/user.js
index f89f7def..b3fae39c 100644
--- a/lib/user.js
+++ b/lib/user.js
@@ -1,6 +1,7 @@
 //user
 //external modules
 var mongoose = require('mongoose');
+var md5 = require("blueimp-md5").md5;
 
 //core
 var config = require("../config.js");
@@ -20,9 +21,30 @@ var user = {
     findUser: findUser,
     newUser: newUser,
     findOrNewUser: findOrNewUser,
-    getUserCount: getUserCount
+    getUserCount: getUserCount,
+    parsePhotoByProfile: parsePhotoByProfile
 };
 
+function parsePhotoByProfile(profile) {
+    var photo = null;
+    switch (profile.provider) {
+        case "facebook":
+            photo = 'https://graph.facebook.com/' + profile.id + '/picture';
+            break;
+        case "twitter":
+            photo = profile.photos[0].value;
+            break;
+        case "github":
+            photo = 'https://avatars.githubusercontent.com/u/' + profile.id + '?s=48';
+            break;
+        case "dropbox":
+            //no image api provided, use gravatar
+            photo = 'https://www.gravatar.com/avatar/' + md5(profile.emails[0].value);
+            break;
+    }
+    return photo;
+}
+
 function getUserCount(callback) {
     model.count(function(err, count){
         if(err) callback(err, null);
@@ -31,9 +53,13 @@ function getUserCount(callback) {
 }
 
 function findUser(id, callback) {
-    model.findOne({
-        id: id
-    }, function (err, user) {
+    var rule = {};
+    var checkForHexRegExp = new RegExp("^[0-9a-fA-F]{24}$");
+    if (checkForHexRegExp.test(id))
+        rule._id = id;
+    else
+        rule.id = id;
+    model.findOne(rule, function (err, user) {
         if (err) {
             logger.error('find user failed: ' + err);
             callback(err, null);
diff --git a/package.json b/package.json
index 664673dc..1238ff35 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "lz-string": "1.4.4",
     "markdown-pdf": "^6.0.0",
     "marked": "^0.3.5",
+    "meta-marked": "^0.4.0",
     "method-override": "^2.3.5",
     "moment": "^2.10.6",
     "mongoose": "^4.3.1",
diff --git a/public/css/extra.css b/public/css/extra.css
index 1e0356c7..8d91f529 100644
--- a/public/css/extra.css
+++ b/public/css/extra.css
@@ -56,6 +56,7 @@ h6:hover .header-link {
 .header-link {
     position: relative;
     left: 0.5em;
+    right: 0.5em;
     opacity: 0;
     font-size: 0.8em;
     -webkit-transition: opacity 0.2s ease-in-out 0.1s;
@@ -114,6 +115,12 @@ h6:hover .header-link {
     width: 25vw;
     max-height: 65vh;
     overflow: auto;
+    text-align: inherit;
+}
+
+.ui-toc-dropdown[dir='rtl'] .nav {
+    padding-right: 0;
+    letter-spacing: 0.0029em;
 }
 
 .ui-toc-dropdown a {
@@ -138,6 +145,12 @@ h6:hover .header-link {
     border-left: 1px solid black;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav>li>a:focus,.ui-toc-dropdown[dir='rtl'] .nav>li>a:hover {
+    padding-right: 19px;
+    border-left: none;
+    border-right: 1px solid black;
+}
+
 .ui-toc-dropdown .nav>.active:focus>a,.ui-toc-dropdown .nav>.active:hover>a,.ui-toc-dropdown .nav>.active>a {
     padding-left: 18px;
     font-weight: 700;
@@ -146,6 +159,12 @@ h6:hover .header-link {
     border-left: 2px solid black;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav>.active:focus>a,.ui-toc-dropdown[dir='rtl'] .nav>.active:hover>a,.ui-toc-dropdown[dir='rtl'] .nav>.active>a {
+    padding-right: 18px;
+    border-left: none;
+    border-right: 2px solid black;
+}
+
 .ui-toc-dropdown .nav .nav {
     display: none;
     padding-bottom: 10px;
@@ -163,6 +182,10 @@ h6:hover .header-link {
     font-weight: 400;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav .nav>li>a {
+    padding-right: 30px;
+}
+
 .ui-toc-dropdown .nav .nav>li>ul>li>a {
     padding-top: 1px;
     padding-bottom: 1px;
@@ -171,24 +194,44 @@ h6:hover .header-link {
     font-weight: 400;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav .nav>li>ul>li>a {
+    padding-right: 40px;
+}
+
 .ui-toc-dropdown .nav .nav>li>a:focus,.ui-toc-dropdown .nav .nav>li>a:hover {
     padding-left: 29px;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav .nav>li>a:focus,.ui-toc-dropdown[dir='rtl'] .nav .nav>li>a:hover {
+    padding-right: 29px;
+}
+
 .ui-toc-dropdown .nav .nav>li>ul>li>a:focus,.ui-toc-dropdown .nav .nav>li>ul>li>a:hover {
     padding-left: 39px;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav .nav>li>ul>li>a:focus,.ui-toc-dropdown[dir='rtl'] .nav .nav>li>ul>li>a:hover {
+    padding-right: 39px;
+}
+
 .ui-toc-dropdown .nav .nav>.active:focus>a,.ui-toc-dropdown .nav .nav>.active:hover>a,.ui-toc-dropdown .nav .nav>.active>a {
     padding-left: 28px;
     font-weight: 500;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav .nav>.active:focus>a,.ui-toc-dropdown[dir='rtl'] .nav .nav>.active:hover>a,.ui-toc-dropdown[dir='rtl'] .nav .nav>.active>a {
+    padding-right: 28px;
+}
+
 .ui-toc-dropdown .nav .nav>.active>.nav>.active:focus>a,.ui-toc-dropdown .nav .nav>.active>.nav>.active:hover>a,.ui-toc-dropdown .nav .nav>.active>.nav>.active>a {
     padding-left: 38px;
     font-weight: 500;
 }
 
+.ui-toc-dropdown[dir='rtl'] .nav .nav>.active>.nav>.active:focus>a,.ui-toc-dropdown[dir='rtl'] .nav .nav>.active>.nav>.active:hover>a,.ui-toc-dropdown[dir='rtl'] .nav .nav>.active>.nav>.active>a {
+    padding-right: 38px;
+}
+
 .ui-affix-toc {
     position: fixed;
     top: 0;
@@ -216,6 +259,26 @@ h6:hover .header-link {
     margin-top: 0;
 }
 
+.ui-user-icon {
+    width: 20px;
+    height: 20px;
+    display: block;
+    border-radius: 3px;
+    margin-top: 2px;
+    margin-bottom: 2px;
+    margin-right: 5px;
+    background-position: center center;
+    background-repeat: no-repeat;
+    background-size: contain;
+}
+.ui-user-icon.small {
+	width: 18px;
+	height: 18px;
+	display: inline-block;
+	vertical-align: middle;
+	margin: 0 0 0.2em 0;
+}
+
 small span {
     line-height: 22px;
 }
diff --git a/public/css/html.min.css b/public/css/html.min.css
index 679c0142..50de453e 100644
--- a/public/css/html.min.css
+++ b/public/css/html.min.css
@@ -1 +1 @@
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table{display:block;width:100%;overflow:auto;word-break:normal;word-break:keep-all}.markdown-body table th{font-weight:700}.markdown-body table td,.markdown-body table th{padding:6px 13px;border:1px solid #ddd}.markdown-body table tr{background-color:#fff;border-top:1px solid #ccc}.markdown-body table tr:nth-child(2n){background-color:#f8f8f8}.markdown-body img{max-width:100%;-moz-box-sizing:border-box;box-sizing:border-box}.markdown-body .emoji{width:20px;height:20px;max-width:none;margin-bottom:0}.markdown-body span.frame{display:block;overflow:hidden}.markdown-body span.frame>span{display:block;float:left;width:auto;padding:7px;margin:13px 0 0;overflow:hidden;border:1px solid #ddd}.markdown-body span.frame span img{display:block;float:left}.markdown-body span.frame span span{display:block;padding:5px 0 0;clear:both;color:#333}.markdown-body span.align-center{display:block;overflow:hidden;clear:both}.markdown-body span.align-center>span{display:block;margin:13px auto 0;overflow:hidden;text-align:center}.markdown-body span.align-center span img{margin:0 auto;text-align:center}.markdown-body span.align-right{display:block;overflow:hidden;clear:both}.markdown-body span.align-right>span{display:block;margin:13px 0 0;overflow:hidden;text-align:right}.markdown-body span.align-right span img{margin:0;text-align:right}.markdown-body span.float-left{display:block;float:left;margin-right:13px;overflow:hidden}.markdown-body span.float-left span{margin:13px 0 0}.markdown-body span.float-right{display:block;float:right;margin-left:13px;overflow:hidden}.markdown-body span.float-right>span{display:block;margin:13px auto 0;overflow:hidden;text-align:right}.markdown-body code,.markdown-body tt{padding:.2em 0;margin:0;font-size:85%;background-color:rgba(0,0,0,.04);border-radius:3px}.markdown-body code:after,.markdown-body code:before,.markdown-body tt:after,.markdown-body tt:before{letter-spacing:-.2em;content:"\00a0"}.markdown-body code br,.markdown-body tt br{display:none}.markdown-body del code{text-decoration:inherit}.markdown-body pre>code{padding:0;margin:0;font-size:100%;word-break:normal;white-space:pre;background:0 0;border:0}.markdown-body .highlight{margin-bottom:1pc}.markdown-body .highlight pre,.markdown-body pre{padding:1pc;overflow:auto;font-size:85%;line-height:1.45;background-color:#f7f7f7;border-radius:3px}.markdown-body .highlight pre{margin-bottom:0;word-break:normal}.markdown-body pre code,.markdown-body pre tt{display:inline;max-width:initial;padding:0;margin:0;overflow:initial;line-height:inherit;word-wrap:normal;background-color:transparent;border:0}.markdown-body pre code:after,.markdown-body pre code:before,.markdown-body pre tt:after,.markdown-body pre tt:before{content:normal}.markdown-body .csv-data td,.markdown-body .csv-data th{padding:5px;overflow:hidden;font-size:9pt;line-height:1;text-align:left;white-space:nowrap}.markdown-body .csv-data .blob-line-num{padding:10px 8px 9px;text-align:right;background:#fff;border:0}.markdown-body .csv-data tr{border-top:0}.markdown-body .csv-data th{font-weight:700;background:#f8f8f8;border-top:0}.news .alert .markdown-body blockquote{padding:0 0 0 40px;border:0}.activity-tab .news .alert .commits,.activity-tab .news .markdown-body blockquote{padding-left:0}.task-list-item{list-style-type:none}.task-list-item label{font-weight:400}.task-list-item.enabled label{cursor:pointer}.task-list-item+.task-list-item{margin-top:3px}.task-list-item-checkbox{float:left;margin:.31em 0 .2em -1.3em!important;vertical-align:middle;cursor:default!important}.markdown-body{font-family:"Helvetica Neue",Helvetica,Arial,"Microsoft JhengHei",Meiryo,"ＭＳ ゴシック","MS Gothic",sans-serif;padding-top:40px;padding-bottom:40px;max-width:758px;overflow:visible!important}.markdown-body pre{word-wrap:normal;border:inherit!important}.markdown-body code{color:inherit!important}.markdown-body pre code .wrapper{display:-webkit-inline-flex;display:-moz-inline-flex;display:-ms-inline-flex;display:-o-inline-flex;display:inline-flex}.markdown-body pre code .gutter{float:left;overflow:hidden;-webkit-user-select:none;user-select:none}.markdown-body pre code .gutter.linenumber{text-align:right;position:relative;display:inline-block;cursor:default;z-index:4;padding:0 8px 0 0;min-width:20px;box-sizing:content-box;color:#afafaf!important;border-right:3px solid #6ce26c!important}.markdown-body .flow-chart,.markdown-body .sequence-diagram,.vimeo,.youtube{text-align:center}.markdown-body pre code .gutter.linenumber>span:before{content:attr(data-linenumber)}.markdown-body pre code .code{float:left;margin:0 0 0 1pc}.markdown-body .gist .line-numbers{border-left:none;border-top:none;border-bottom:none}.markdown-body .gist .line-data{border:none}.markdown-body .gist table{border-spacing:0;border-collapse:inherit!important}.markdown-body code[data-gist-id]{background:0 0;padding:0}.ui-user-icon,.vimeo,.youtube{background-position:center center;background-repeat:no-repeat;background-size:contain}.markdown-body code[data-gist-id]:after,.markdown-body code[data-gist-id]:before{content:''}.markdown-body .flow-chart{margin-bottom:40px}.markdown-body[dir=rtl] pre{direction:ltr}.markdown-body[dir=rtl] code{direction:ltr;unicode-bidi:embed}svg{width:100%;max-height:70vh}.vimeo,.youtube{position:relative;cursor:pointer;display:table;max-width:540px;background-color:#000}.vimeo img,.youtube img{position:absolute;margin:auto;top:0;left:0;right:0;bottom:0}.vimeo .icon,.youtube .icon{position:absolute;height:auto;width:auto;top:50%;left:50%;margin-top:-40px;margin-left:-40px;color:#fff;opacity:.3;-webkit-transition:opacity .2s;transition:opacity .2s}.vimeo:hover .icon,.youtube:hover .icon{opacity:.6;-webkit-transition:opacity .2s;transition:opacity .2s}h1:hover .header-link,h2:hover .header-link,h3:hover .header-link,h4:hover .header-link,h5:hover .header-link,h6:hover .header-link{opacity:1;-webkit-transition:opacity .2s ease-in-out .1s;-moz-transition:opacity .2s ease-in-out .1s;-o-transition:opacity .2s ease-in-out .1s;transition:opacity .2s ease-in-out .1s}.header-link{position:relative;left:.5em;right:.5em;opacity:0;font-size:.8em;-webkit-transition:opacity .2s ease-in-out .1s;-moz-transition:opacity .2s ease-in-out .1s;-o-transition:opacity .2s ease-in-out .1s;transition:opacity .2s ease-in-out .1s}.ui-infobar{max-width:758px;margin-top:25px;margin-bottom:-25px;color:#777}.ui-toc{position:fixed;bottom:20px;z-index:10000}.ui-toc-label{opacity:.3;background-color:#ccc;border:none;-webkit-transition:opacity .2s;transition:opacity .2s}.ui-toc .open .ui-toc-label{opacity:1;color:#fff;-webkit-transition:opacity .2s;transition:opacity .2s}.ui-toc-label:focus{opacity:.3;background-color:#ccc;color:#000}.ui-toc-label:hover{opacity:1;background-color:#ccc;-webkit-transition:opacity .2s;transition:opacity .2s}.ui-toc-dropdown{margin-top:23px;margin-bottom:20px;padding-left:10px;padding-right:10px;max-width:45vw;width:25vw;max-height:65vh;overflow:auto;text-align:inherit}.ui-toc-dropdown[dir=rtl] .nav{padding-right:0;letter-spacing:.0029em}.ui-toc-dropdown a{overflow:hidden;text-overflow:ellipsis;white-space:pre}.ui-toc-dropdown .nav>li>a{display:block;padding:4px 20px;font-size:13px;font-weight:500;color:#767676}.ui-toc-dropdown .nav>li>a:focus,.ui-toc-dropdown .nav>li>a:hover{padding-left:19px;color:#000;text-decoration:none;background-color:transparent;border-left:1px solid #000}.ui-toc-dropdown[dir=rtl] .nav>li>a:focus,.ui-toc-dropdown[dir=rtl] .nav>li>a:hover{padding-right:19px;border-left:none;border-right:1px solid #000}.ui-toc-dropdown .nav>.active:focus>a,.ui-toc-dropdown .nav>.active:hover>a,.ui-toc-dropdown .nav>.active>a{padding-left:18px;font-weight:700;color:#000;background-color:transparent;border-left:2px solid #000}.ui-toc-dropdown[dir=rtl] .nav>.active:focus>a,.ui-toc-dropdown[dir=rtl] .nav>.active:hover>a,.ui-toc-dropdown[dir=rtl] .nav>.active>a{padding-right:18px;border-left:none;border-right:2px solid #000}.ui-toc-dropdown .nav .nav{display:none;padding-bottom:10px}.ui-toc-dropdown .nav>.active>ul,.ui-user-icon{display:block}.ui-toc-dropdown .nav .nav>li>a{padding-top:1px;padding-bottom:1px;padding-left:30px;font-size:9pt;font-weight:400}.ui-toc-dropdown[dir=rtl] .nav .nav>li>a{padding-right:30px}.ui-toc-dropdown .nav .nav>li>ul>li>a{padding-top:1px;padding-bottom:1px;padding-left:40px;font-size:9pt;font-weight:400}.ui-toc-dropdown[dir=rtl] .nav .nav>li>ul>li>a{padding-right:40px}.ui-toc-dropdown .nav .nav>li>a:focus,.ui-toc-dropdown .nav .nav>li>a:hover{padding-left:29px}.ui-toc-dropdown[dir=rtl] .nav .nav>li>a:focus,.ui-toc-dropdown[dir=rtl] .nav .nav>li>a:hover{padding-right:29px}.ui-toc-dropdown .nav .nav>li>ul>li>a:focus,.ui-toc-dropdown .nav .nav>li>ul>li>a:hover{padding-left:39px}.ui-toc-dropdown[dir=rtl] .nav .nav>li>ul>li>a:focus,.ui-toc-dropdown[dir=rtl] .nav .nav>li>ul>li>a:hover{padding-right:39px}.ui-toc-dropdown .nav .nav>.active:focus>a,.ui-toc-dropdown .nav .nav>.active:hover>a,.ui-toc-dropdown .nav .nav>.active>a{padding-left:28px;font-weight:500}.ui-toc-dropdown[dir=rtl] .nav .nav>.active:focus>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active:hover>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active>a{padding-right:28px}.ui-toc-dropdown .nav .nav>.active>.nav>.active:focus>a,.ui-toc-dropdown .nav .nav>.active>.nav>.active:hover>a,.ui-toc-dropdown .nav .nav>.active>.nav>.active>a{padding-left:38px;font-weight:500}.ui-toc-dropdown[dir=rtl] .nav .nav>.active>.nav>.active:focus>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active>.nav>.active:hover>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active>.nav>.active>a{padding-right:38px}.ui-affix-toc{position:fixed;top:0;max-width:15vw;max-height:70vh;overflow:auto}.back-to-top,.go-to-bottom{display:block;padding:4px 10px;margin-top:10px;margin-left:10px;font-size:9pt;font-weight:500;color:#999}.back-to-top:focus,.back-to-top:hover,.go-to-bottom:focus,.go-to-bottom:hover{color:#563d7c;text-decoration:none}.go-to-bottom{margin-top:0}.ui-user-icon{width:20px;height:20px;border-radius:3px;margin-top:2px;margin-bottom:2px;margin-right:5px}.ui-user-icon.small,small .dropdown{display:inline-block}.ui-user-icon.small{width:18px;height:18px;vertical-align:middle;margin:0 0 .2em}small span{line-height:22px}small .dropdown a:focus,small .dropdown a:hover{text-decoration:none}.unselectable{-moz-user-select:none;-khtml-user-select:none;-webkit-user-select:none;-o-user-select:none;user-select:none}@media print{blockquote,div,img,pre,table{page-break-inside:avoid!important}a[href]:after{font-size:9pt!important}}@font-face{font-family:'Source Code Pro';font-style:normal;font-weight:300;src:local('Source Code Pro Light'),local('SourceCodePro-Light'),url(https://fonts.gstatic.com/s/sourcecodepro/v6/leqv3v-yTsJNC7nFznSMqUBls_1aQwi4AfipSOlE3SU.ttf) format('truetype')}@font-face{font-family:'Source Code Pro';font-style:normal;font-weight:400;src:local('Source Code Pro'),local('SourceCodePro-Regular'),url(https://fonts.gstatic.com/s/sourcecodepro/v6/mrl8jkM18OlOQN8JLgasD1zCdIATDt8zXO3QNtzVeJ8.ttf) format('truetype')}@font-face{font-family:'Source Code Pro';font-style:normal;font-weight:500;src:local('Source Code Pro Medium'),local('SourceCodePro-Medium'),url(https://fonts.gstatic.com/s/sourcecodepro/v6/leqv3v-yTsJNC7nFznSMqdgxThF69EFTxeh70dQtJtE.ttf) format('truetype')}@font-face{font-family:'Source Sans Pro';font-style:normal;font-weight:300;src:local('Source Sans Pro Light'),local('SourceSansPro-Light'),url(https://fonts.gstatic.com/s/sourcesanspro/v9/toadOcfmlt9b38dHJxOBGEBls_1aQwi4AfipSOlE3SU.ttf) format('truetype')}@font-face{font-family:'Source Sans Pro';font-style:normal;font-weight:400;src:local('Source Sans Pro'),local('SourceSansPro-Regular'),url(https://fonts.gstatic.com/s/sourcesanspro/v9/ODelI1aHBYDBqgeIAH2zlFzCdIATDt8zXO3QNtzVeJ8.ttf) format('truetype')}@font-face{font-family:'Source Sans Pro';font-style:normal;font-weight:600;src:local('Source Sans Pro Semibold'),local('SourceSansPro-Semibold'),url(https://fonts.gstatic.com/s/sourcesanspro/v9/toadOcfmlt9b38dHJxOBGGvd-IutAbwf5FQ8ZpuI2w4.ttf) format('truetype')}@font-face{font-family:'Source Sans Pro';font-style:italic;font-weight:300;src:local('Source Sans Pro Light Italic'),local('SourceSansPro-LightIt'),url(https://fonts.gstatic.com/s/sourcesanspro/v9/fpTVHK8qsXbIeTHTrnQH6I48KljrVa8Zcyi9xGGohEU.ttf) format('truetype')}@font-face{font-family:'Source Sans Pro';font-style:italic;font-weight:400;src:local('Source Sans Pro Italic'),local('SourceSansPro-It'),url(https://fonts.gstatic.com/s/sourcesanspro/v9/M2Jd71oPJhLKp0zdtTvoM6xot8ENfkYez2Lz7rcrw70.ttf) format('truetype')}@font-face{font-family:'Source Sans Pro';font-style:italic;font-weight:600;src:local('Source Sans Pro Semibold Italic'),local('SourceSansPro-SemiboldIt'),url(https://fonts.gstatic.com/s/sourcesanspro/v9/fpTVHK8qsXbIeTHTrnQH6KjMMkbXdLGS8FpAnMJn5J0.ttf) format('truetype')}@font-face{font-family:'Source Serif Pro';font-style:normal;font-weight:400;src:local('Source Serif Pro'),local('SourceSerifPro-Regular'),url(https://fonts.gstatic.com/s/sourceserifpro/v4/CeUM4np2c42DV49nanp55WdjwOOpWxWrsXXkZJyNRnI.ttf) format('truetype')}body{font-smoothing:subpixel-antialiased!important;-webkit-font-smoothing:subpixel-antialiased!important;-moz-osx-font-smoothing:auto!important;text-shadow:1px 1px 1px rgba(0,0,0,.004);-webkit-overflow-scrolling:touch;font-family:"Source Sans Pro",Helvetica,Arial,"Microsoft JhengHei UI","Meiryo UI","ＭＳ Ｐゴシック","MS PGothic",sans-serif;letter-spacing:.025em}:focus{outline:0!important}::-moz-focus-inner{border:0!important}body.modal-open{overflow-y:auto;padding-right:0!important}
\ No newline at end of file
diff --git a/public/css/index.css b/public/css/index.css
index 1f20e926..3be56065 100644
--- a/public/css/index.css
+++ b/public/css/index.css
@@ -156,18 +156,7 @@ body {
 .ui-user-name {
     margin-top: 2px;
 }
-.ui-user-icon {
-    width: 20px;
-    height: 20px;
-    display: block;
-    border-radius: 3px;
-    margin-top: 2px;
-    margin-bottom: 2px;
-    margin-right: 5px;
-    background-position: center center;
-    background-repeat: no-repeat;
-    background-size: contain;
-}
+
 .ui-user-status {
     margin-top: 5px;
 }
@@ -213,7 +202,6 @@ body {
     width: 0px;
     position: absolute;
     border-right: none;
-    transition: left 0.1s, top 0.1s;
 }
 .dropdown-menu.other-cursor {
     transition: none;
@@ -243,6 +231,10 @@ div[contenteditable]:empty:not(:focus):before{
     max-height: 80vh;
     overflow: auto;
 }
+.dropdown-menu.list.small {
+    max-height: 40vh;
+    overflow: auto;
+}
 .dropdown-menu.list::-webkit-scrollbar { 
     display: none; 
 }
@@ -279,6 +271,25 @@ div[contenteditable]:empty:not(:focus):before{
     display: block;
 }
 
+.info-label {
+	width: 36%;
+	text-align: right;
+	position: relative;
+    display: inline-block;
+	margin-right: 6px;
+}
+.popover {
+	width: 100%;
+	font-family: inherit !important;
+	line-height: 25px;
+}
+
+.text-ellipsis {
+	text-overflow: ellipsis;
+	overflow: hidden;
+	white-space: nowrap;
+}
+
 .cm-trailing-space-a:before,
 .cm-trailing-space-b:before,
 .cm-trailing-space-new-line:before {
diff --git a/public/css/markdown.css b/public/css/markdown.css
index 6a98212a..f9009d58 100644
--- a/public/css/markdown.css
+++ b/public/css/markdown.css
@@ -36,7 +36,6 @@
     text-align: right;
     position: relative;
     display: inline-block;
-    float: right;
     cursor: default;
     z-index: 4;
     padding: 0 8px 0 0;
@@ -89,6 +88,18 @@
 .markdown-body .flow-chart {
     margin-bottom: 40px;
 }
+
+/*fixed style for rtl in pre and code*/
+
+.markdown-body[dir='rtl'] pre {
+    direction: ltr;
+}
+
+.markdown-body[dir='rtl'] code {
+    direction: ltr;
+    unicode-bidi: embed;
+}
+
 svg {
     width: 100%;
     max-height: 70vh;
diff --git a/public/js/extra.js b/public/js/extra.js
index 07e85acc..e624bfaf 100644
--- a/public/js/extra.js
+++ b/public/js/extra.js
@@ -1,15 +1,32 @@
 //auto update last change
 var lastchangetime = null;
-var lastchangeui = null;
+var lastchangeui = {
+    time: $(".ui-lastchange"),
+    user: $(".ui-lastchangeuser"),
+    nouser: $(".ui-no-lastchangeuser")
+}
 
 function updateLastChange() {
     if (lastchangetime && lastchangeui) {
-        lastchangeui.html('&nbsp;<i class="fa fa-clock-o"></i> change ' + moment(lastchangetime).fromNow());
-        lastchangeui.attr('title', moment(lastchangetime).format('llll'));
+        lastchangeui.time.html(moment(lastchangetime).fromNow());
+        lastchangeui.time.attr('title', moment(lastchangetime).format('llll'));
     }
 }
 setInterval(updateLastChange, 60000);
 
+function updateLastChangeUser(data) {
+    if (data.lastchangeuserprofile) {
+        var icon = lastchangeui.user.children('i');
+        icon.attr('title', data.lastchangeuserprofile.name).tooltip('fixTitle');
+        icon.attr('style', 'background-image:url(' + data.lastchangeuserprofile.photo + ')');
+        lastchangeui.user.show();
+        lastchangeui.nouser.hide();
+    } else {
+        lastchangeui.user.hide();
+        lastchangeui.nouser.show();
+    }
+}
+
 //get title
 function getTitle(view) {
     var h1s = view.find("h1");
@@ -48,6 +65,57 @@ function slugifyWithUTF8(text) {
     return newText;
 }
 
+//parse meta
+function parseMeta(md, view, toc, tocAffix) {
+    var robots = null;
+    var lang = null;
+    var dir = null;
+    var breaks = true;
+    if (md && md.meta) {
+        var meta = md.meta;
+        robots = meta.robots;
+        lang = meta.lang;
+        dir = meta.dir;
+        breaks = meta.breaks;
+    }
+    //robots meta
+    var robotsMeta = $('meta[name=robots]');
+    if (robots) {
+        if (robotsMeta.length > 0)
+            robotsMeta.attr('content', robots);
+        else
+            $('head').prepend('<meta name="robots" content="' + robots + '">')
+    }
+    else
+        robotsMeta.remove();
+    //text language
+    if (lang) {
+        view.attr('lang', lang);
+        toc.attr('lang', lang);
+        tocAffix.attr('lang', lang);
+    } else {
+        view.removeAttr('lang');
+        toc.removeAttr('lang');
+        tocAffix.removeAttr('lang');
+    }
+    //text direction
+    if (dir) {
+        view.attr('dir', dir);
+        toc.attr('dir', dir);
+        tocAffix.attr('dir', dir);
+    } else {
+        view.removeAttr('dir');
+        toc.removeAttr('dir');
+        tocAffix.removeAttr('dir');
+    }
+    //breaks
+    if (typeof breaks === 'boolean' && !breaks) {
+        md.options.breaks = false;
+    } else {
+        md.options.breaks = true;
+    }
+}
+
 var viewAjaxCallback = null;
 
 //regex for extra tags
@@ -329,7 +397,10 @@ function exportToHTML(view) {
                 css: css,
                 html: src[0].outerHTML,
                 toc: toc.html(),
-                'toc-affix': tocAffix.html()
+                'toc-affix': tocAffix.html(),
+                robots: (md && md.meta && md.meta.robots) ? '<meta name="robots" content="' + md.meta.robots + '">' : null,
+                lang: (md && md.meta && md.meta.lang) ? 'lang="' + md.meta.lang + '"' : null,
+                dir: (md && md.meta && md.meta.dir) ? 'dir="' + md.meta.dir + '"' : null
             };
             var html = template(context);
             //        console.log(html);
@@ -737,6 +808,49 @@ var speakerdeckPlugin = new Plugin(
         return div[0].outerHTML;
     }
 );
+
+//yaml meta, from https://github.com/eugeneware/remarkable-meta
+function get(state, line) {
+    var pos = state.bMarks[line];
+    var max = state.eMarks[line];
+    return state.src.substr(pos, max - pos);
+}
+
+function meta(state, start, end, silent) {
+    if (start !== 0 || state.blkIndent !== 0) return false;
+    if (state.tShift[start] < 0) return false;
+    if (!get(state, start).match(/^---$/)) return false;
+
+    var data = [];
+    for (var line = start + 1; line < end; line++) {
+        var str = get(state, line);
+        if (str.match(/^(\.{3}|-{3})$/)) break;
+        if (state.tShift[line] < 0) break;
+        data.push(str);
+    }
+
+    if (line >= end) return false;
+
+    try {
+        md.meta = jsyaml.safeLoad(data.join('\n')) || {};
+    } catch(err) {
+        console.error(err);
+        return false;
+    }
+
+    state.line = line + 1;
+
+    return true;
+}
+
+function metaPlugin(md) {
+    md.meta = md.meta || {};
+    md.block.ruler.before('code', 'meta', meta, {
+        alt: []
+    });
+}
+
+md.use(metaPlugin);
 md.use(youtubePlugin);
 md.use(vimeoPlugin);
 md.use(gistPlugin);
diff --git a/public/js/index.js b/public/js/index.js
index e9be3de0..34cca1f8 100644
--- a/public/js/index.js
+++ b/public/js/index.js
@@ -320,6 +320,8 @@ var ui = {
     },
     infobar: {
         lastchange: $(".ui-lastchange"),
+        lastchangeuser: $(".ui-lastchangeuser"),
+        nolastchangeuser: $(".ui-no-lastchangeuser"),
         permission: {
             permission: $(".ui-permission"),
             label: $(".ui-permission-label"),
@@ -387,9 +389,9 @@ function setHaveUnreadChanges(bool) {
 function updateTitleReminder() {
     if (!loaded) return;
     if (haveUnreadChanges) {
-        document.title = '• ' + renderTitle(ui.area.view);
+        document.title = '• ' + renderTitle(ui.area.markdown);
     } else {
-        document.title = renderTitle(ui.area.view);
+        document.title = renderTitle(ui.area.markdown);
     }
 }
 
@@ -465,6 +467,8 @@ $(document).ready(function () {
         upClass: 'navbar-hide',
         downClass: 'navbar-show'
     });
+    //tooltip
+    $('[data-toggle="tooltip"]').tooltip();
 });
 //when page resize
 $(window).resize(function () {
@@ -1165,8 +1169,8 @@ socket.on('version', function (data) {
 });
 socket.on('check', function (data) {
     lastchangetime = data.updatetime;
-    lastchangeui = ui.infobar.lastchange;
     updateLastChange();
+    updateLastChangeUser(data);
 });
 socket.on('permission', function (data) {
     updatePermission(data.permission);
@@ -1182,8 +1186,8 @@ socket.on('refresh', function (data) {
     owner = data.owner;
     updatePermission(data.permission);
     lastchangetime = data.updatetime;
-    lastchangeui = ui.infobar.lastchange;
     updateLastChange();
+    updateLastChangeUser(data);
     if (!loaded) {
         changeMode(currentMode);
         loaded = true;
@@ -1884,15 +1888,18 @@ var lastResult = null;
 function updateViewInner() {
     if (currentMode == modeType.edit || !isDirty) return;
     var value = editor.getValue();
+    md.meta = {};
+    md.render(value); //only for get meta
+    parseMeta(md, ui.area.markdown, $('#toc'), $('#toc-affix'));
     var result = postProcess(md.render(value)).children().toArray();
     partialUpdate(result, lastResult, ui.area.markdown.children().toArray());
     if (result && lastResult && result.length != lastResult.length)
         updateDataAttrs(result, ui.area.markdown.children().toArray());
     lastResult = $(result).clone();
-    finishView(ui.area.view);
-    autoLinkify(ui.area.view);
-    deduplicatedHeaderId(ui.area.view);
-    renderTOC(ui.area.view);
+    finishView(ui.area.markdown);
+    autoLinkify(ui.area.markdown);
+    deduplicatedHeaderId(ui.area.markdown);
+    renderTOC(ui.area.markdown);
     generateToc('toc');
     generateToc('toc-affix');
     generateScrollspy();
diff --git a/public/js/pretty.js b/public/js/pretty.js
index ff393cac..43e833c2 100644
--- a/public/js/pretty.js
+++ b/public/js/pretty.js
@@ -1,5 +1,8 @@
 var markdown = $(".markdown-body");
 var text = $('<textarea/>').html(markdown.html()).text();
+md.meta = {};
+md.render(text); //only for get meta
+parseMeta(md, markdown, $('#toc'), $('#toc-affix'));
 var result = postProcess(md.render(text));
 markdown.html(result.html());
 $(document.body).show();
@@ -10,8 +13,7 @@ renderTOC(markdown);
 generateToc('toc');
 generateToc('toc-affix');
 smoothHashScroll();
-lastchangetime = $('.ui-lastchange').text();
-lastchangeui = $('.ui-lastchange');
+lastchangetime = lastchangeui.time.text();
 updateLastChange();
 var url = window.location.pathname;
 $('.ui-edit').attr('href', url + '/edit');
@@ -68,6 +70,8 @@ $(window).resize(function () {
 $(document).ready(function () {
     windowResize();
     generateScrollspy();
+    //tooltip
+    $('[data-toggle="tooltip"]').tooltip();
 });
 
 function scrollToTop() {
diff --git a/public/views/body.ejs b/public/views/body.ejs
index f47cf175..b3a49db8 100644
--- a/public/views/body.ejs
+++ b/public/views/body.ejs
@@ -5,7 +5,12 @@
     <div class="ui-view-area">
         <div class="ui-infobar container-fluid unselectable hidden-print">
             <small>
-                <span class="ui-lastchange text-uppercase"></span>
+                <span>
+                	<span class="ui-lastchangeuser">&thinsp;<i class="ui-user-icon small" data-toggle="tooltip" data-placement="right"></i></span>
+                	<span class="ui-no-lastchangeuser">&thinsp;<i class="fa fa-clock-o"></i></span>
+                	&nbsp;<span class="text-uppercase">changed</span>
+                	<span class="ui-lastchange text-uppercase"></span>
+                </span>
                 <span class="ui-permission dropdown pull-right">
                     <a id="permissionLabel" class="ui-permission-label text-uppercase" data-target="#" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">
                     </a>
diff --git a/public/views/foot.ejs b/public/views/foot.ejs
index ee04d440..c042438d 100644
--- a/public/views/foot.ejs
+++ b/public/views/foot.ejs
@@ -6,6 +6,7 @@
 <script src="//cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/TweenMax.min.js" defer></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/jquery.gsap.min.js" defer></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/socket.io/1.3.7/socket.io.min.js" defer></script>
+<script src="//cdnjs.cloudflare.com/ajax/libs/js-yaml/3.4.6/js-yaml.min.js" defer></script>
 <% } else { %>
 <script src="/vendor/spin.js/spin.min.js" defer></script>
 <script src="/vendor/jquery/dist/jquery.min.js"></script>
@@ -14,6 +15,7 @@
 <script src="/vendor/gsap/src/minified/TweenMax.min.js" defer></script>
 <script src="/vendor/gsap/src/minified/jquery.gsap.min.js" defer></script>
 <script src="/vendor/socket.io-client/socket.io.js" defer></script>
+<script src="/vendor/js-yaml/dist/js-yaml.min.js" defer></script>
 <% } %>
 <script src="/vendor/jquery-ui/jquery-ui.min.js" defer></script>
 <!--codemirror-->
diff --git a/public/views/head.ejs b/public/views/head.ejs
index fa690108..795665b4 100644
--- a/public/views/head.ejs
+++ b/public/views/head.ejs
@@ -4,6 +4,9 @@
 <meta name="apple-mobile-web-app-capable" content="yes">
 <meta name="apple-mobile-web-app-status-bar-style" content="black">
 <meta name="mobile-web-app-capable" content="yes">
+<% if(typeof robots !== 'undefined' && robots) { %>
+<meta name="robots" content="<%- robots %>">
+<% } %>
 <title><%- title %></title>
 <link rel="icon" type="image/png" href="/favicon.png">
 <link rel="apple-touch-icon" href="/apple-touch-icon.png">
diff --git a/public/views/html.hbs b/public/views/html.hbs
index e3aa1331..5c7e6bea 100644
--- a/public/views/html.hbs
+++ b/public/views/html.hbs
@@ -9,6 +9,7 @@
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="black">
     <meta name="mobile-web-app-capable" content="yes">
+    {{{robots}}}
     <title>
         {{title}}
     </title>
@@ -42,7 +43,7 @@
             </ul>
         </div>
     </div>
-    <div id="toc-affix" class="ui-affix-toc ui-toc-dropdown unselectable hidden-print" data-spy="affix" style="top:17px;display:none;">
+    <div id="toc-affix" class="ui-affix-toc ui-toc-dropdown unselectable hidden-print" data-spy="affix" style="top:17px;display:none;" {{{lang}}} {{{dir}}}>
         {{{toc-affix}}}
     </div>
     <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
diff --git a/public/views/pretty.ejs b/public/views/pretty.ejs
index 46c559f9..6fe02827 100644
--- a/public/views/pretty.ejs
+++ b/public/views/pretty.ejs
@@ -8,6 +8,9 @@
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="black">
     <meta name="mobile-web-app-capable" content="yes">
+    <% if(typeof robots !== 'undefined' && robots) { %>
+    <meta name="robots" content="<%- robots %>">
+    <% } %>
     <title><%- title %></title>
     <link rel="icon" type="image/png" href="<%- url %>/favicon.png">
 	<link rel="apple-touch-icon" href="<%- url %>/apple-touch-icon.png">
@@ -37,13 +40,19 @@
 <body style="display:none;">
     <div class="ui-infobar container-fluid unselectable hidden-print">
         <small>
-            <span class="ui-lastchange text-uppercase"><%- updatetime %></span>
-            <span class="pull-right"><%- viewcount %> views <a href="#" class="ui-edit" title="Edit this note"><i class="fa fa-pencil"></i></a></span>
+            <span>
+                <% if(lastchangeuserprofile) { %>
+                    <span class="ui-lastchangeuser">&thinsp;<i class="ui-user-icon small" style="background-image: url(<%- lastchangeuserprofile.photo %>);" data-toggle="tooltip" data-placement="right" title="<%- lastchangeuserprofile.name %>"></i></span>
+                <% } else { %>
+                	<span class="ui-no-lastchangeuser">&thinsp;<i class="fa fa-clock-o"></i></span>
+                <% } %>
+                &nbsp;<span class="text-uppercase">changed</span>
+                <span class="ui-lastchange text-uppercase"><%- updatetime %></span>
+            </span>
+            <span class="pull-right"><%- viewcount %> views <a href="#" class="ui-edit" title="Edit this note"><i class="fa fa-fw fa-pencil"></i></a></span>
         </small>
     </div>
-    <div id="doc" class="container markdown-body">
-<%- body %>
-    </div>
+    <div id="doc" class="container markdown-body"><%- body %></div>
     <div class="ui-toc dropup unselectable hidden-print" style="display:none;">
         <div class="pull-right dropdown">
             <a id="tocLabel" class="ui-toc-label btn btn-default" data-target="#" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false" title="Table of content">
@@ -60,9 +69,11 @@
 <% if(useCDN) { %>
 <script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/3.4.6/js-yaml.min.js" defer></script>
 <% } else { %>
 <script src="<%- url %>/vendor/jquery/dist/jquery.min.js"></script>
 <script src="<%- url %>/vendor/bootstrap/dist/js/bootstrap.min.js" defer></script>
+<script src="<%- url %>/vendor/js-yaml/dist/js-yaml.min.js" defer></script>
 <% } %>
 <script src="<%- url %>/vendor/lz-string.min.js" defer></script>
 <script src="<%- url %>/vendor/remarkable.min.js" defer></script>