diff --git a/addons/web/static/lib/underscore/underscore.string.js b/addons/web/static/lib/underscore/underscore.string.js
index 4da2b26ec1c..d15c1f1f7ce 100644
--- a/addons/web/static/lib/underscore/underscore.string.js
+++ b/addons/web/static/lib/underscore/underscore.string.js
@@ -4,301 +4,436 @@
 // Documentation: https://github.com/edtsech/underscore.string
 // Some code is borrowed from MooTools and Alexandru Marasteanu.
 
-// Version 1.1.4
+// Version 1.1.6
 
-(function(){
-    // ------------------------- Baseline setup ---------------------------------
 
-    // Establish the root object, "window" in the browser, or "global" on the server.
-    var root = this;
+(function(root){
+  'use strict';
 
-    var nativeTrim = String.prototype.trim;
+  if (typeof _ != 'undefined') {
+    var _reverse = _().reverse,
+        _include = _.include;
+  }
 
-    function str_repeat(i, m) {
-        for (var o = []; m > 0; o[--m] = i);
-        return o.join('');
+  // Defining helper functions.
+
+  var nativeTrim = String.prototype.trim;
+
+  var parseNumber = function(source) { return source * 1 || 0; };
+
+  var strRepeat = function(i, m) {
+    for (var o = []; m > 0; o[--m] = i);
+    return o.join('');
+  };
+
+  var slice = function(a){
+    return Array.prototype.slice.call(a);
+  };
+
+  var defaultToWhiteSpace = function(characters){
+    if (characters) {
+      return _s.escapeRegExp(characters);
+    }
+    return '\\s';
+  };
+
+  var sArgs = function(method){
+    return function(){
+      var args = slice(arguments);
+      for(var i=0; i<args.length; i++)
+        args[i] = args[i] == null ? '' : '' + args[i];
+      return method.apply(null, args);
+    };
+  };
+
+  // sprintf() for JavaScript 0.7-beta1
+  // http://www.diveintojavascript.com/projects/javascript-sprintf
+  //
+  // Copyright (c) Alexandru Marasteanu <alexaholic [at) gmail (dot] com>
+  // All rights reserved.
+
+  var sprintf = (function() {
+    function get_type(variable) {
+      return Object.prototype.toString.call(variable).slice(8, -1).toLowerCase();
     }
 
-    function defaultToWhiteSpace(characters){
-        if (characters) {
-            return _s.escapeRegExp(characters);
+    var str_repeat = strRepeat;
+
+    var str_format = function() {
+      if (!str_format.cache.hasOwnProperty(arguments[0])) {
+        str_format.cache[arguments[0]] = str_format.parse(arguments[0]);
+      }
+      return str_format.format.call(null, str_format.cache[arguments[0]], arguments);
+    };
+
+    str_format.format = function(parse_tree, argv) {
+      var cursor = 1, tree_length = parse_tree.length, node_type = '', arg, output = [], i, k, match, pad, pad_character, pad_length;
+      for (i = 0; i < tree_length; i++) {
+        node_type = get_type(parse_tree[i]);
+        if (node_type === 'string') {
+          output.push(parse_tree[i]);
         }
-        return '\\s';
-    }
-
-    var _s = {
-
-        isBlank: function(str){
-            return !!str.match(/^\s*$/);
-        },
-
-        capitalize : function(str) {
-            return str.charAt(0).toUpperCase() + str.substring(1).toLowerCase();
-        },
-
-        chop: function(str, step){
-            step = step || str.length;
-            var arr = [];
-            for (var i = 0; i < str.length;) {
-                arr.push(str.slice(i,i + step));
-                i = i + step;
+        else if (node_type === 'array') {
+          match = parse_tree[i]; // convenience purposes only
+          if (match[2]) { // keyword argument
+            arg = argv[cursor];
+            for (k = 0; k < match[2].length; k++) {
+              if (!arg.hasOwnProperty(match[2][k])) {
+                throw(sprintf('[_.sprintf] property "%s" does not exist', match[2][k]));
+              }
+              arg = arg[match[2][k]];
             }
-            return arr;
-        },
+          } else if (match[1]) { // positional argument (explicit)
+            arg = argv[match[1]];
+          }
+          else { // positional argument (implicit)
+            arg = argv[cursor++];
+          }
 
-        clean: function(str){
-            return _s.strip(str.replace(/\s+/g, ' '));
-        },
+          if (/[^s]/.test(match[8]) && (get_type(arg) != 'number')) {
+            throw(sprintf('[_.sprintf] expecting number but found %s', get_type(arg)));
+          }
+          switch (match[8]) {
+            case 'b': arg = arg.toString(2); break;
+            case 'c': arg = String.fromCharCode(arg); break;
+            case 'd': arg = parseInt(arg, 10); break;
+            case 'e': arg = match[7] ? arg.toExponential(match[7]) : arg.toExponential(); break;
+            case 'f': arg = match[7] ? parseFloat(arg).toFixed(match[7]) : parseFloat(arg); break;
+            case 'o': arg = arg.toString(8); break;
+            case 's': arg = ((arg = String(arg)) && match[7] ? arg.substring(0, match[7]) : arg); break;
+            case 'u': arg = Math.abs(arg); break;
+            case 'x': arg = arg.toString(16); break;
+            case 'X': arg = arg.toString(16).toUpperCase(); break;
+          }
+          arg = (/[def]/.test(match[8]) && match[3] && arg >= 0 ? '+'+ arg : arg);
+          pad_character = match[4] ? match[4] == '0' ? '0' : match[4].charAt(1) : ' ';
+          pad_length = match[6] - String(arg).length;
+          pad = match[6] ? str_repeat(pad_character, pad_length) : '';
+          output.push(match[5] ? arg + pad : pad + arg);
+        }
+      }
+      return output.join('');
+    };
 
-        count: function(str, substr){
-            var count = 0, index;
-            for (var i=0; i < str.length;) {
-                index = str.indexOf(substr, i);
-                index >= 0 && count++;
-                i = i + (index >= 0 ? index : 0) + substr.length;
-            }
-            return count;
-        },
+    str_format.cache = {};
 
-        chars: function(str) {
-            return str.split('');
-        },
-
-        escapeHTML: function(str) {
-            return String(str||'').replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;')
-                                  .replace(/"/g, '&quot;').replace(/'/g, "&apos;");
-        },
-
-        unescapeHTML: function(str) {
-            return String(str||'').replace(/&amp;/g, '&').replace(/&lt;/g, '<').replace(/&gt;/g, '>')
-                                  .replace(/&quot;/g, '"').replace(/&apos;/g, "'");
-        },
-
-        escapeRegExp: function(str){
-            // From MooTools core 1.2.4
-            return String(str||'').replace(/([-.*+?^${}()|[\]\/\\])/g, '\\$1');
-        },
-
-        insert: function(str, i, substr){
-            var arr = str.split('');
-            arr.splice(i, 0, substr);
-            return arr.join('');
-        },
-
-        includes: function(str, needle){
-            return str.indexOf(needle) !== -1;
-        },
-
-        join: function(sep) {
-            // TODO: Could this be faster by converting
-            // arguments to Array and using array.join(sep)?
-            sep = String(sep);
-            var str = "";
-            for (var i=1; i < arguments.length; i += 1) {
-                str += String(arguments[i]);
-                if ( i !== arguments.length-1 ) {
-                    str += sep;
+    str_format.parse = function(fmt) {
+      var _fmt = fmt, match = [], parse_tree = [], arg_names = 0;
+      while (_fmt) {
+        if ((match = /^[^\x25]+/.exec(_fmt)) !== null) {
+          parse_tree.push(match[0]);
+        }
+        else if ((match = /^\x25{2}/.exec(_fmt)) !== null) {
+          parse_tree.push('%');
+        }
+        else if ((match = /^\x25(?:([1-9]\d*)\$|\(([^\)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(_fmt)) !== null) {
+          if (match[2]) {
+            arg_names |= 1;
+            var field_list = [], replacement_field = match[2], field_match = [];
+            if ((field_match = /^([a-z_][a-z_\d]*)/i.exec(replacement_field)) !== null) {
+              field_list.push(field_match[1]);
+              while ((replacement_field = replacement_field.substring(field_match[0].length)) !== '') {
+                if ((field_match = /^\.([a-z_][a-z_\d]*)/i.exec(replacement_field)) !== null) {
+                  field_list.push(field_match[1]);
                 }
-            }
-            return str;
-        },
-
-        lines: function(str) {
-            return str.split("\n");
-        },
-
-//        reverse: function(str){
-//            return Array.prototype.reverse.apply(str.split('')).join('');
-//        },
-
-        splice: function(str, i, howmany, substr){
-            var arr = str.split('');
-            arr.splice(i, howmany, substr);
-            return arr.join('');
-        },
-
-        startsWith: function(str, starts){
-            return str.length >= starts.length && str.substring(0, starts.length) === starts;
-        },
-
-        endsWith: function(str, ends){
-            return str.length >= ends.length && str.substring(str.length - ends.length) === ends;
-        },
-
-        succ: function(str){
-            var arr = str.split('');
-            arr.splice(str.length-1, 1, String.fromCharCode(str.charCodeAt(str.length-1) + 1));
-            return arr.join('');
-        },
-
-        titleize: function(str){
-            var arr = str.split(' '),
-                word;
-            for (var i=0; i < arr.length; i++) {
-                word = arr[i].split('');
-                if(typeof word[0] !== 'undefined') word[0] = word[0].toUpperCase();
-                i+1 === arr.length ? arr[i] = word.join('') : arr[i] = word.join('') + ' ';
-            }
-            return arr.join('');
-        },
-
-        camelize: function(str){
-          return _s.trim(str).replace(/(\-|_|\s)+(.)?/g, function(match, separator, chr) {
-            return chr ? chr.toUpperCase() : '';
-          });
-        },
-
-        underscored: function(str){
-          return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1_$2').replace(/\-|\s+/g, '_').toLowerCase();
-        },
-
-        dasherize: function(str){
-          return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1-$2').replace(/^([A-Z]+)/, '-$1').replace(/\_|\s+/g, '-').toLowerCase();
-        },
-
-        trim: function(str, characters){
-            if (!characters && nativeTrim) {
-                return nativeTrim.call(str);
-            }
-            characters = defaultToWhiteSpace(characters);
-            return str.replace(new RegExp('\^[' + characters + ']+|[' + characters + ']+$', 'g'), '');
-        },
-
-        ltrim: function(str, characters){
-            characters = defaultToWhiteSpace(characters);
-            return str.replace(new RegExp('\^[' + characters + ']+', 'g'), '');
-        },
-
-        rtrim: function(str, characters){
-            characters = defaultToWhiteSpace(characters);
-            return str.replace(new RegExp('[' + characters + ']+$', 'g'), '');
-        },
-
-        truncate: function(str, length, truncateStr){
-            truncateStr = truncateStr || '...';
-            return str.slice(0,length) + truncateStr;
-        },
-
-        words: function(str, delimiter) {
-            delimiter = delimiter || " ";
-            return str.split(delimiter);
-        },
-
-
-        pad: function(str, length, padStr, type) {
-
-            var padding = '';
-            var padlen  = 0;
-
-            if (!padStr) { padStr = ' '; }
-            else if (padStr.length > 1) { padStr = padStr[0]; }
-            switch(type) {
-                case "right":
-                    padlen = (length - str.length);
-                    padding = str_repeat(padStr, padlen);
-                    str = str+padding;
-                    break;
-                case "both":
-                    padlen = (length - str.length);
-                    padding = {
-                        'left' : str_repeat(padStr, Math.ceil(padlen/2)),
-                        'right': str_repeat(padStr, Math.floor(padlen/2))
-                    };
-                    str = padding.left+str+padding.right;
-                    break;
-                default: // "left"
-                    padlen = (length - str.length);
-                    padding = str_repeat(padStr, padlen);;
-                    str = padding+str;
-            }
-            return str;
-        },
-
-        lpad: function(str, length, padStr) {
-            return _s.pad(str, length, padStr);
-        },
-
-        rpad: function(str, length, padStr) {
-            return _s.pad(str, length, padStr, 'right');
-        },
-
-        lrpad: function(str, length, padStr) {
-            return _s.pad(str, length, padStr, 'both');
-        },
-
-
-        /**
-         * Credits for this function goes to
-         * http://www.diveintojavascript.com/projects/sprintf-for-javascript
-         *
-         * Copyright (c) Alexandru Marasteanu <alexaholic [at) gmail (dot] com>
-         * All rights reserved.
-         * */
-        sprintf: function(){
-
-            var i = 0, a, f = arguments[i++], o = [], m, p, c, x, s = '';
-            while (f) {
-                if (m = /^[^\x25]+/.exec(f)) {
-                    o.push(m[0]);
-                }
-                else if (m = /^\x25{2}/.exec(f)) {
-                    o.push('%');
-                }
-                else if (m = /^\x25(?:(\d+)\$)?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(f)) {
-                    if (((a = arguments[m[1] || i++]) == null) || (a == undefined)) {
-                        throw('Too few arguments.');
-                    }
-                    if (/[^s]/.test(m[7]) && (typeof(a) != 'number')) {
-                        throw('Expecting number but found ' + typeof(a));
-                    }
-                    switch (m[7]) {
-                        case 'b': a = a.toString(2); break;
-                        case 'c': a = String.fromCharCode(a); break;
-                        case 'd': a = parseInt(a); break;
-                        case 'e': a = m[6] ? a.toExponential(m[6]) : a.toExponential(); break;
-                        case 'f': a = m[6] ? parseFloat(a).toFixed(m[6]) : parseFloat(a); break;
-                        case 'o': a = a.toString(8); break;
-                        case 's': a = ((a = String(a)) && m[6] ? a.substring(0, m[6]) : a); break;
-                        case 'u': a = Math.abs(a); break;
-                        case 'x': a = a.toString(16); break;
-                        case 'X': a = a.toString(16).toUpperCase(); break;
-                    }
-                    a = (/[def]/.test(m[7]) && m[2] && a >= 0 ? '+'+ a : a);
-                    c = m[3] ? m[3] == '0' ? '0' : m[3].charAt(1) : ' ';
-                    x = m[5] - String(a).length - s.length;
-                    p = m[5] ? str_repeat(c, x) : '';
-                    o.push(s + (m[4] ? a + p : p + a));
+                else if ((field_match = /^\[(\d+)\]/.exec(replacement_field)) !== null) {
+                  field_list.push(field_match[1]);
                 }
                 else {
-                    throw('Huh ?!');
+                  throw('[_.sprintf] huh?');
                 }
-                f = f.substring(m[0].length);
+              }
             }
-            return o.join('');
+            else {
+              throw('[_.sprintf] huh?');
+            }
+            match[2] = field_list;
+          }
+          else {
+            arg_names |= 2;
+          }
+          if (arg_names === 3) {
+            throw('[_.sprintf] mixing positional and named placeholders is not (yet) supported');
+          }
+          parse_tree.push(match);
         }
-    }
+        else {
+          throw('[_.sprintf] huh?');
+        }
+        _fmt = _fmt.substring(match[0].length);
+      }
+      return parse_tree;
+    };
 
-    // Aliases
+    return str_format;
+  })();
 
-    _s.strip  = _s.trim;
-    _s.lstrip = _s.ltrim;
-    _s.rstrip = _s.rtrim;
-    _s.center = _s.lrpad
-    _s.ljust  = _s.lpad
-    _s.rjust  = _s.rpad
 
-    // CommonJS module is defined
-    if (typeof window === 'undefined' && typeof module !== 'undefined') {
-        // Export module
-        module.exports = _s;
 
-    // Integrate with Underscore.js
-    } else if (typeof root._ !== 'undefined') {
-        root._.mixin(_s);
+  // Defining underscore.string
 
-    // Or define it
-    } else {
-        root._ = _s;
-    }
+  var _s = {
 
-}());
+    isBlank: sArgs(function(str){
+      return (/^\s*$/).test(str);
+    }),
+
+    stripTags: sArgs(function(str){
+      return str.replace(/<\/?[^>]+>/ig, '');
+    }),
+
+    capitalize : sArgs(function(str) {
+      return str.charAt(0).toUpperCase() + str.substring(1).toLowerCase();
+    }),
+
+    chop: sArgs(function(str, step){
+      step = parseNumber(step) || str.length;
+      var arr = [];
+      for (var i = 0; i < str.length;) {
+        arr.push(str.slice(i,i + step));
+        i = i + step;
+      }
+      return arr;
+    }),
+
+    clean: sArgs(function(str){
+      return _s.strip(str.replace(/\s+/g, ' '));
+    }),
+
+    count: sArgs(function(str, substr){
+      var count = 0, index;
+      for (var i=0; i < str.length;) {
+        index = str.indexOf(substr, i);
+        index >= 0 && count++;
+        i = i + (index >= 0 ? index : 0) + substr.length;
+      }
+      return count;
+    }),
+
+    chars: sArgs(function(str) {
+      return str.split('');
+    }),
+
+    escapeHTML: sArgs(function(str) {
+      return str.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;')
+                            .replace(/"/g, '&quot;').replace(/'/g, "&apos;");
+    }),
+
+    unescapeHTML: sArgs(function(str) {
+      return str.replace(/&lt;/g, '<').replace(/&gt;/g, '>')
+                            .replace(/&quot;/g, '"').replace(/&apos;/g, "'").replace(/&amp;/g, '&');
+    }),
+
+    escapeRegExp: sArgs(function(str){
+      // From MooTools core 1.2.4
+      return str.replace(/([-.*+?^${}()|[\]\/\\])/g, '\\$1');
+    }),
+
+    insert: sArgs(function(str, i, substr){
+      var arr = str.split('');
+      arr.splice(parseNumber(i), 0, substr);
+      return arr.join('');
+    }),
+
+    includes: sArgs(function(str, needle){
+      return str.indexOf(needle) !== -1;
+    }),
+
+    include: function(obj, needle) {
+      if (!_include || (/string|number/).test(typeof obj)) {
+        return this.includes(obj, needle);
+      } else {
+        return _include(obj, needle);
+      }
+    },
+
+    join: sArgs(function(sep) {
+      var args = slice(arguments);
+      return args.join(args.shift());
+    }),
+
+    lines: sArgs(function(str) {
+      return str.split("\n");
+    }),
+
+    reverse: function(obj){
+      if (!_reverse || (/string|number/).test(typeof obj)) {
+        return Array.prototype.reverse.apply(String(obj).split('')).join('');
+      } else {
+        return _reverse.call(_(obj));
+      }
+    },
+
+    splice: sArgs(function(str, i, howmany, substr){
+      var arr = str.split('');
+      arr.splice(parseNumber(i), parseNumber(howmany), substr);
+      return arr.join('');
+    }),
+
+    startsWith: sArgs(function(str, starts){
+      return str.length >= starts.length && str.substring(0, starts.length) === starts;
+    }),
+
+    endsWith: sArgs(function(str, ends){
+      return str.length >= ends.length && str.substring(str.length - ends.length) === ends;
+    }),
+
+    succ: sArgs(function(str){
+      var arr = str.split('');
+      arr.splice(str.length-1, 1, String.fromCharCode(str.charCodeAt(str.length-1) + 1));
+      return arr.join('');
+    }),
+
+    titleize: sArgs(function(str){
+      var arr = str.split(' '),
+          word;
+      for (var i=0; i < arr.length; i++) {
+        word = arr[i].split('');
+        if(typeof word[0] !== 'undefined') word[0] = word[0].toUpperCase();
+        i+1 === arr.length ? arr[i] = word.join('') : arr[i] = word.join('') + ' ';
+      }
+      return arr.join('');
+    }),
+
+    camelize: sArgs(function(str){
+      return _s.trim(str).replace(/(\-|_|\s)+(.)?/g, function(match, separator, chr) {
+        return chr ? chr.toUpperCase() : '';
+      });
+    }),
+
+    underscored: function(str){
+      return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1_$2').replace(/\-|\s+/g, '_').toLowerCase();
+    },
+
+    dasherize: function(str){
+      return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1-$2').replace(/^([A-Z]+)/, '-$1').replace(/\_|\s+/g, '-').toLowerCase();
+    },
+
+    trim: sArgs(function(str, characters){
+      if (!characters && nativeTrim) {
+        return nativeTrim.call(str);
+      }
+      characters = defaultToWhiteSpace(characters);
+      return str.replace(new RegExp('\^[' + characters + ']+|[' + characters + ']+$', 'g'), '');
+    }),
+
+    ltrim: sArgs(function(str, characters){
+      characters = defaultToWhiteSpace(characters);
+      return str.replace(new RegExp('\^[' + characters + ']+', 'g'), '');
+    }),
+
+    rtrim: sArgs(function(str, characters){
+      characters = defaultToWhiteSpace(characters);
+      return str.replace(new RegExp('[' + characters + ']+$', 'g'), '');
+    }),
+
+    truncate: sArgs(function(str, length, truncateStr){
+      truncateStr = truncateStr || '...';
+      length = parseNumber(length);
+      return str.length > length ? str.slice(0,length) + truncateStr : str;
+    }),
+
+    words: function(str, delimiter) {
+      return String(str).split(delimiter || " ");
+    },
+
+    pad: sArgs(function(str, length, padStr, type) {
+      var padding = '',
+          padlen  = 0;
+
+      length = parseNumber(length);
+
+      if (!padStr) { padStr = ' '; }
+      else if (padStr.length > 1) { padStr = padStr.charAt(0); }
+      switch(type) {
+        case 'right':
+          padlen = (length - str.length);
+          padding = strRepeat(padStr, padlen);
+          str = str+padding;
+          break;
+        case 'both':
+          padlen = (length - str.length);
+          padding = {
+            'left' : strRepeat(padStr, Math.ceil(padlen/2)),
+            'right': strRepeat(padStr, Math.floor(padlen/2))
+          };
+          str = padding.left+str+padding.right;
+          break;
+        default: // 'left'
+          padlen = (length - str.length);
+          padding = strRepeat(padStr, padlen);;
+          str = padding+str;
+        }
+      return str;
+    }),
+
+    lpad: function(str, length, padStr) {
+      return _s.pad(str, length, padStr);
+    },
+
+    rpad: function(str, length, padStr) {
+      return _s.pad(str, length, padStr, 'right');
+    },
+
+    lrpad: function(str, length, padStr) {
+      return _s.pad(str, length, padStr, 'both');
+    },
+
+    sprintf: sprintf,
+
+    vsprintf: function(fmt, argv){
+      argv.unshift(fmt);
+      return sprintf.apply(null, argv);
+    },
+
+    toNumber: function(str, decimals) {
+      var num = parseNumber(parseNumber(str).toFixed(parseNumber(decimals)));
+      return (!(num === 0 && (str !== "0" && str !== 0))) ? num : Number.NaN;
+    },
+
+    strRight: sArgs(function(sourceStr, sep){
+      var pos =  (!sep) ? -1 : sourceStr.indexOf(sep);
+      return (pos != -1) ? sourceStr.slice(pos+sep.length, sourceStr.length) : sourceStr;
+    }),
+
+    strRightBack: sArgs(function(sourceStr, sep){
+      var pos =  (!sep) ? -1 : sourceStr.lastIndexOf(sep);
+      return (pos != -1) ? sourceStr.slice(pos+sep.length, sourceStr.length) : sourceStr;
+    }),
+
+    strLeft: sArgs(function(sourceStr, sep){
+      var pos = (!sep) ? -1 : sourceStr.indexOf(sep);
+      return (pos != -1) ? sourceStr.slice(0, pos) : sourceStr;
+    }),
+
+    strLeftBack: sArgs(function(sourceStr, sep){
+      var pos = sourceStr.lastIndexOf(sep);
+      return (pos != -1) ? sourceStr.slice(0, pos) : sourceStr;
+    })
+
+  };
+
+  // Aliases
+
+  _s.strip  = _s.trim;
+  _s.lstrip = _s.ltrim;
+  _s.rstrip = _s.rtrim;
+  _s.center = _s.lrpad;
+  _s.ljust  = _s.lpad;
+  _s.rjust  = _s.rpad;
+
+  // CommonJS module is defined
+  if (typeof module !== 'undefined' && module.exports) {
+    // Export module
+    module.exports = _s;
+
+  // Integrate with Underscore.js
+  } else if (typeof root._ !== 'undefined') {
+    root._.mixin(_s);
+
+  // Or define it
+  } else {
+    root._ = _s;
+  }
+
+}(this || window));
diff --git a/addons/web_graph/static/src/js/graph.js b/addons/web_graph/static/src/js/graph.js
index 59bc2c29dcf..df661fd65e6 100644
--- a/addons/web_graph/static/src/js/graph.js
+++ b/addons/web_graph/static/src/js/graph.js
@@ -19,11 +19,14 @@ openerp.web_graph.GraphView = openerp.web.View.extend({
 
     init: function(parent, dataset, view_id) {
         this._super(parent);
-        this.view_manager = parent;
         this.dataset = dataset;
-        this.dataset_index = 0;
-        this.model = this.dataset.model;
         this.view_id = view_id;
+
+        this.first_field = null;
+        this.abscissa = null;
+        this.ordinate = null;
+        this.columns = [];
+        this.group_field = null;
     },
     do_show: function () {
         // TODO: re-trigger search
@@ -36,355 +39,262 @@ openerp.web_graph.GraphView = openerp.web.View.extend({
         var self = this;
         this._super();
         return $.when(
-            new openerp.web.DataSet(this, this.model).call('fields_get', []),
+            this.dataset.call('fields_get', []),
             this.rpc('/web/view/load', {
-                model: this.model,
+                model: this.dataset.model,
                 view_id: this.view_id,
                 view_type: 'graph'
             })).then(function (fields_result, view_result) {
-                self.on_loaded({
-                    all_fields: fields_result[0],
-                    fields_view: view_result[0]
-                });
+                self.fields = fields_result[0];
+                self.fields_view = view_result[0];
+                self.on_loaded();
         });
     },
-    on_loaded: function(data) {
-        this.all_fields = data.all_fields;
-        this.fields_view = data.fields_view;
-        this.name = this.fields_view.name || this.fields_view.arch.attrs.string;
-        this.view_id = this.fields_view.view_id;
+    /**
+     * Returns all object fields involved in the graph view
+     */
+    list_fields: function () {
+        var fs = [this.abscissa];
+        fs.push.apply(fs, _(this.columns).pluck('name'));
+        if (this.group_field) {
+            fs.push(this.group_field);
+        }
+        return fs;
+    },
+    on_loaded: function() {
         this.chart = this.fields_view.arch.attrs.type || 'pie';
-        this.fields = this.fields_view.fields;
-        this.chart_info_fields = [];
-        this.operator_field = '';
-        this.operator_field_one = '';
-        this.operator = [];
-        this.group_field = [];
-        this.orientation = this.fields_view.arch.attrs.orientation || '';
+        this.orientation = this.fields_view.arch.attrs.orientation || 'vertical';
+
         _.each(this.fields_view.arch.children, function (field) {
-            if (field.attrs.operator) {
-                this.operator.push(field.attrs.name);
-            }
-            else if (field.attrs.group) {
-                this.group_field.push(field.attrs.name);
-            }
-            else {
-                this.chart_info_fields.push(field.attrs.name);
-            }
-        }, this);
-
-        this.operator_field = this.operator[0];
-        if(this.operator.length > 1){
-            this.operator_field_one = this.operator[1];
-        }
-        if(this.operator == ''){
-            this.operator_field = this.chart_info_fields[1];
-        }
-        this.chart_info = this.chart_info_fields[0];
-        this.x_title = this.fields[this.chart_info_fields[0]]['string'];
-        this.y_title = this.fields[this.operator_field]['string'];
-        this.load_chart();
-    },
-
-    load_chart: function(data) {
-        var self = this;
-        var domain = false;
-        if(data){
-            this.x_title = this.all_fields[this.chart_info_fields]['string'];
-            this.y_title = this.all_fields[this.operator_field]['string'];
-            self.schedule_chart(data);
-        }else{
-            if(! _.isEmpty(this.view_manager.dataset.domain)){
-                domain = this.view_manager.dataset.domain;
-            }else if(! _.isEmpty(this.view_manager.action.domain)){
-                domain = this.view_manager.action.domain;
-            }
-            this.dataset.domain = domain;
-            this.dataset.context = this.view_manager.dataset.context;
-            this.dataset.read_slice(_(this.fields).keys(),{}, function(res) {
-                self.schedule_chart(res);
-            });
-        }
-    },
-
-    schedule_chart: function(results) {
-        this.$element.html(QWeb.render("GraphView", {"fields_view": this.fields_view, "chart": this.chart,'element_id': this.element_id}));
-
-        _.each(results, function (result) {
-            _.each(result, function (field_value, field_name) {
-                if (typeof field_value == 'object') {
-                    result[field_name] = field_value[field_value.length - 1];
-                }
-                if (typeof field_value == 'string') {
-                    var choices = this.all_fields[field_name]['selection'];
-                    _.each(choices, function (choice) {
-                        if (field_value == choice[0]) {
-                            result[field_name] = choice;
-                        }
-                    });
-                }
-            }, this);
-        }, this);
-
-        var graph_data = {};
-        _.each(results, function (result) {
-            var group_key = [];
-            if(this.group_field.length){
-                _.each(this.group_field, function (res) {
-                        result[res] = (typeof result[res] == 'object') ? result[res][1] : result[res];
-                        group_key.push(result[res]);
-                });
-            }else{
-                group_key.push(result[this.group_field]);
-            }
-            var column_key = result[this.chart_info_fields] + "_" + group_key;
-            var column_descriptor = {};
-            if (graph_data[column_key] == undefined) {
-                column_descriptor[this.operator_field] = result[this.operator_field];
-                if (this.operator.length > 1) {
-                    column_descriptor[this.operator_field_one] = result[this.operator_field_one];
-                }
-                column_descriptor[this.chart_info_fields] = result[this.chart_info_fields];
-                if(this.group_field.length){
-                    _.each(this.group_field, function (res) {
-                        column_descriptor[res] = (typeof result[res] == 'object') ? result[res][1] : result[res];
-                    });
-                }
+            var attrs = field.attrs;
+            if (attrs.group) {
+                this.group_field = attrs.name;
+            } else if(!this.abscissa) {
+                this.first_field = this.abscissa = attrs.name;
             } else {
-                column_descriptor = graph_data[column_key];
-                column_descriptor[this.operator_field] += result[this.operator_field];
-                if (this.operator.length > 1) {
-                    column_descriptor[this.operator_field_one] += result[this.operator_field_one];
-                }
+                this.columns.push({
+                    name: attrs.name,
+                    operator: attrs.operator || '+'
+                });
             }
-            graph_data[column_key] = column_descriptor;
         }, this);
+        this.ordinate = this.columns[0].name;
+
+        this.dataset.read_slice(
+            this.list_fields(), {}, $.proxy(this, 'schedule_chart'));
+    },
+    schedule_chart: function(results) {
+        var self = this;
+        this.$element.html(QWeb.render("GraphView", {
+            "fields_view": this.fields_view,
+            "chart": this.chart,
+            'element_id': this.element_id
+        }));
+
+        var fields = _(this.columns).pluck('name').concat([this.first_field]);
+        if (this.group_field) { fields.push(this.group_field); }
+        // transform search result into usable records (convert from OpenERP
+        // value shapes to usable atomic types
+        var records = _(results).map(function (result) {
+            var point = {};
+            _(result).each(function (value, field) {
+                if (!_(fields).contains(field)) { return; }
+                if (value === false) { point[field] = false; return; }
+                switch (self.fields[field].type) {
+                case 'selection':
+                    point[field] = _(self.fields[field].selection).detect(function (choice) {
+                        return choice[0] === value;
+                    })[1];
+                    break;
+                case 'many2one':
+                    point[field] = value[1];
+                    break;
+                case 'integer': case 'float': case 'char':
+                case 'date': case 'datetime':
+                    point[field] = value;
+                    break;
+                default:
+                    throw new Error(
+                        "Unknown field type " + self.fields[field].type
+                        + "for field " + field + " (" + value + ")");
+                }
+            });
+            return point;
+        });
+        // aggregate data, because dhtmlx is crap. Aggregate on abscissa field,
+        // leave split on group field => max m*n records where m is the # of
+        // values for the abscissa and n is the # of values for the group field
+        var graph_data = [];
+        _(records).each(function (record) {
+            var abscissa = record[self.abscissa],
+                group = record[self.group_field];
+            var r = _(graph_data).detect(function (potential) {
+                return potential[self.abscissa] === abscissa
+                        && (!self.group_field
+                            || potential[self.group_field] === group);
+            });
+            var datapoint = r || {};
+
+            datapoint[self.abscissa] = abscissa;
+            if (self.group_field) { datapoint[self.group_field] = group; }
+            _(self.columns).each(function (column) {
+                var val = record[column.name],
+                    aggregate = datapoint[column.name];
+                switch(column.operator) {
+                case '+':
+                    datapoint[column.name] = (aggregate || 0) + val;
+                    return;
+                case '*':
+                    datapoint[column.name] = (aggregate || 1) * val;
+                    return;
+                case 'min':
+                    datapoint[column.name] = (aggregate || Infinity) > val
+                                           ? val
+                                           : aggregate;
+                    return;
+                case 'max':
+                    datapoint[column.name] = (aggregate || -Infinity) < val
+                                           ? val
+                                           : aggregate;
+                }
+            });
+
+            if (!r) { graph_data.push(datapoint); }
+        });
+        graph_data = _(graph_data).sortBy(function (point) {
+            return point[self.abscissa] + '[[--]]' + point[self.group_field];
+        });
 
         if (this.chart == 'bar') {
-            return this.schedule_bar(_.values(graph_data));
+            return this.schedule_bar(graph_data);
         } else if (this.chart == "pie") {
-            return this.schedule_pie(_.values(graph_data));
+            return this.schedule_pie(graph_data);
         }
     },
 
     schedule_bar: function(results) {
         var self = this;
-        var view_chart = '';
-        var group_list = [];
-        var legend_list = [];
-        var newkey = '', newkey_one;
-        var string_legend = '';
 
-        if((self.group_field.length) && (this.operator.length <= 1)){
-            view_chart = self.orientation == 'horizontal'? 'stackedBarH' : 'stackedBar';
-        }else{
-            view_chart = self.orientation == 'horizontal'? 'barH' : 'bar';
-        }
-
-        _.each(results, function (result) {
-            if ((self.group_field.length) && (this.operator.length <= 1)) {
-                var legend_key = '';
-                _.each(self.group_field, function (res) {
-                    result[res] = (typeof result[res] == 'object') ? result[res][1] : result[res];
-                    legend_key += result[res];
-                });
-                newkey = legend_key.replace(/\s+/g,'_').replace(/[^a-zA-Z 0-9]+/g,'_');
-                string_legend = legend_key;
-            } else {
-                newkey = string_legend = "val";
-            }
-
-            if (_.contains(group_list, newkey) && _.contains(legend_list, string_legend)) {
-                return;
-            }
-            group_list.push(newkey);
-            legend_list.push(string_legend);
-
-            if (this.operator.length > 1) {
-                newkey_one = "val1";
-                group_list.push(newkey_one);
-                legend_list.push(newkey_one);
-            }
-        }, this);
-
-        if (group_list.length <=1){
-            group_list = [];
-            legend_list = [];
-            newkey = string_legend = "val";
-            group_list.push(newkey);
-            legend_list.push(string_legend);
-        }
-
-        var abscissa_data = {};
-        _.each(results, function (result) {
-            var label = result[self.chart_info_fields],
-              section = {};
-            if ((self.group_field.length) && (group_list.length > 1) && (self.operator.length <= 1)){
-                var legend_key_two = '';
-                _.each(self.group_field, function (res) {
-                    result[res] = (typeof result[res] == 'object') ? result[res][1] : result[res];
-                    legend_key_two += result[res];
-                });
-                newkey = legend_key_two.replace(/\s+/g,'_').replace(/[^a-zA-Z 0-9]+/g,'_');
-            }else{
-                newkey = "val";
-            }
-            if (abscissa_data[label] == undefined){
-                section[self.chart_info_fields] = label;
-                _.each(group_list, function (group) {
-                    section[group] = 0;
-                });
-            } else {
-                section = abscissa_data[label];
-            }
-            section[newkey] = result[self.operator_field];
-            if (self.operator.length > 1){
-                section[newkey_one] = result[self.operator_field_one];
-            }
-            abscissa_data[label] = section;
-        });
-
-        //for legend color
-        var grp_color = _.map(legend_list, function (group_legend, index) {
-            var legend = {color: COLOR_PALETTE[index]};
-            if (group_legend == "val"){
-                legend['text'] = self.fields[self.operator_field]['string']
-            }else if(group_legend == "val1"){
-                legend['text'] = self.fields[self.operator_field_one]['string']
-            }else{
-                legend['text'] = group_legend;
-            }
-            return legend;
-        });
-
-        //for axis's value and title
-        var max,min,step;
-        var maximum,minimum;
-        if(_.isEmpty(abscissa_data)){
-            max = 9;
-            min = 0;
-            step=1;
-        }else{
-            var max_min = [];
-            _.each(abscissa_data, function (abscissa_datas) {
-                _.each(group_list, function(res){
-                    max_min.push(abscissa_datas[res]);
-                });
-            });
-            maximum = Math.max.apply(Math,max_min);
-            minimum = Math.min.apply(Math,max_min);
-            if (maximum == minimum){
-                if (maximum == 0){
-                    max = 9;
-                    min = 0;
-                    step=1;
-                }else if(maximum > 0){
-                    max = maximum + (10 - maximum % 10);
-                    min = 0;
-                    step = Math.round(max/10);
-                }else{
-                    max = 0;
-                    min = minimum - (10 + minimum % 10);
-                    step = Math.round(Math.abs(min)/10);
+        var group_list, view_chart;
+        if (!this.group_field) {
+            view_chart = (this.orientation === 'horizontal') ? 'barH' : 'bar';
+            group_list = _(this.columns).map(function (column, index) {
+                return {
+                    group: column.name,
+                    text: self.fields[column.name].string,
+                    color: COLOR_PALETTE[index % (COLOR_PALETTE.length)]
                 }
+            });
+        } else {
+            // dhtmlx handles clustered bar charts (> 1 column per abscissa
+            // value) and stacked bar charts (basically the same but with the
+            // columns on top of one another instead of side by side), but it
+            // does not handle clustered stacked bar charts
+            if (this.columns.length > 1) {
+                this.$element.text(
+                    'OpenERP Web does not support combining grouping and '
+                  + 'multiple columns in graph at this time.');
+                throw new Error(
+                    'dhtmlx can not handle columns counts of that magnitude');
             }
+            // transform series for clustered charts into series for stacked
+            // charts
+            view_chart = (this.orientation === 'horizontal')
+                    ? 'stackedBarH' : 'stackedBar';
+            group_list = _(results).chain()
+                    .pluck(this.group_field)
+                    .uniq()
+                    .map(function (value, index) {
+                        return {
+                            group: self.ordinate + '_' +
+                                    value.toLowerCase().replace(/\s/g, '_'),
+                            text: value,
+                            color: COLOR_PALETTE[index % COLOR_PALETTE.length]
+                        };
+                    }).value();
+
+            results = _(results).chain()
+                .groupBy(function (record) { return record[self.abscissa]; })
+                .map(function (records) {
+                    var r = {};
+                    // second argument is coerced to a str, no good for boolean
+                    r[self.abscissa] = records[0][self.abscissa];
+                    _(records).each(function (record) {
+                        var key = _.sprintf('%s_%s',
+                            self.ordinate,
+                            record[self.group_field].toLowerCase().replace(/\s/g, '_'));
+                        r[key] = record[self.ordinate];
+                    });
+                    return r;
+                })
+                .value();
         }
+
         var abscissa_description = {
-            template: self.chart_info_fields,
-            title: "<b>"+self.x_title+"</b>"
+            title: "<b>" + this.fields[this.abscissa].string + "</b>",
+            template: function (obj) {
+                return obj[self.abscissa] || 'Undefined';
+            }
         };
 
         var ordinate_description = {
             lines: true,
-            title: "<b>"+self.y_title+"</b>",
-            start: min,
-            step: step,
-            end: max
+            title: "<b>" + this.fields[this.ordinate].string + "</b>"
         };
 
-        var x_axis, y_axis, tooltip;
-        if (self.orientation == 'horizontal'){
-             x_axis = ordinate_description;
-             y_axis = abscissa_description;
-        }else{
-             x_axis = abscissa_description;
-             y_axis = ordinate_description;
+        var x_axis, y_axis;
+        if (self.orientation == 'horizontal') {
+            x_axis = ordinate_description;
+            y_axis = abscissa_description;
+        } else {
+            x_axis = abscissa_description;
+            y_axis = ordinate_description;
         }
-        tooltip = self.chart_info_fields;
-
+        
         var bar_chart = new dhtmlXChart({
             view: view_chart,
-            container: self.element_id+"-barchart",
-            value:"#"+group_list[0]+"#",
+            container: this.element_id+"-barchart",
+            value:"#"+group_list[0].group+"#",
             gradient: "3d",
             border: false,
             width: 1024,
             tooltip:{
-                template:"#"+tooltip+"#"+","+grp_color[0]['text']+"="+"#"+group_list[0]+"#"
+                template: _.sprintf("#%s#, %s=#%s#",
+                    this.abscissa, group_list[0].text, group_list[0].group)
             },
             radius: 0,
-            color:grp_color[0]['color'],
+            color:group_list[0].color,
             origin:0,
-            xAxis:{
-                template:function(obj){
-                    if(x_axis['template']){
-                        var val = obj[x_axis['template']];
-                        val = (typeof val == 'object')?val[1]:(!val?'Undefined':val);
-                        if(val.length > 12){
-                            val = val.substring(0,12);
-                        }
-                        return val;
-                    }else{
-                        return obj;
-                    }
-                },
-                title:x_axis['title'],
-                lines:x_axis['lines']
-            },
-            yAxis:{
-                template:function(obj){
-                    if(y_axis['template']){
-                        var vals = obj[y_axis['template']];
-                        vals = (typeof vals == 'object')?vals[1]:(!vals?'Undefined':vals);
-                        if(vals.length > 12){
-                            vals = vals.substring(0,12);
-                        }
-                        return vals;
-                    }else{
-                        return obj;
-                    }
-                },
-                title:y_axis['title'],
-                lines: y_axis['lines'],
-                start:y_axis['start'],
-                step:y_axis['step'],
-                end:y_axis['end']
-            },
+            xAxis: x_axis,
+            yAxis: y_axis,
             padding: {
                 left: 75
             },
             legend: {
-                values: grp_color,
+                values: group_list,
                 align:"left",
                 valign:"top",
                 layout: "x",
-                marker:{
+                marker: {
                     type:"round",
                     width:12
                 }
             }
         });
         for (var m = 1; m<group_list.length;m++){
+            var column = group_list[m];
+            if (column.group === this.group_field) { continue; }
             bar_chart.addSeries({
-                value: "#"+group_list[m]+"#",
+                value: "#"+column.group+"#",
                 tooltip:{
-                    template:"#"+tooltip+"#"+","+grp_color[m]['text']+"="+"#"+group_list[m]+"#"
+                    template: _.sprintf("#%s#, %s=#%s#",
+                        this.abscissa, column.text, column.group)
                 },
-                color: grp_color[m]['color']
+                color: column.color
             });
         }
-        bar_chart.parse(_.values(abscissa_data), "json");
-        jQuery("#"+self.element_id+"-barchart").height(jQuery("#"+self.element_id+"-barchart").height()+50);
+        bar_chart.parse(results, "json");
+        jQuery("#"+this.element_id+"-barchart").height(jQuery("#"+this.element_id+"-barchart").height()+50);
         bar_chart.attachEvent("onItemClick", function(id) {
             self.open_list_view(bar_chart.get(id));
         });
@@ -394,14 +304,14 @@ openerp.web_graph.GraphView = openerp.web.View.extend({
         var chart =  new dhtmlXChart({
             view:"pie3D",
             container:self.element_id+"-piechart",
-            value:"#"+self.operator_field+"#",
+            value:"#"+self.ordinate+"#",
             pieInnerText:function(obj) {
-                var sum = chart.sum("#"+self.operator_field+"#");
-                var val = obj[self.operator_field] / sum * 100 ;
+                var sum = chart.sum("#"+self.ordinate+"#");
+                var val = obj[self.ordinate] / sum * 100 ;
                 return val.toFixed(1) + "%";
             },
             tooltip:{
-                template:"#"+self.chart_info_fields+"#"+"="+"#"+self.operator_field+"#"
+                template:"#"+self.abscissa+"#"+"="+"#"+self.ordinate+"#"
             },
             gradient:"3d",
             height: 20,
@@ -416,9 +326,7 @@ openerp.web_graph.GraphView = openerp.web.View.extend({
                     width:12
                 },
                 template:function(obj){
-                    var val = obj[self.chart_info_fields];
-                    val = (typeof val == 'object')?val[1]:val;
-                    return val;
+                    return obj[self.abscissa] || 'Undefined';
                 }
             }
         });
@@ -432,20 +340,13 @@ openerp.web_graph.GraphView = openerp.web.View.extend({
         if($(".dhx_tooltip").is(":visible")) {
             $(".dhx_tooltip").remove('div');
         }
-        id = id[this.chart_info_fields];
+        id = id[this.abscissa];
         if (typeof id == 'object'){
             id = id[0];
         }
 
-        var record_id = "";
-        this.dataset.model = this.model;
-        if (typeof this.chart_info_fields == 'object'){
-            record_id = this.chart_info_fields[0];
-        }else{
-            record_id = this.chart_info_fields;
-        }
-        this.dataset.domain = [[record_id, '=', id],['id','in',this.dataset.ids]];
-        var modes = !!modes ? modes.split(",") : ["list", "form", "graph"];
+        var record_id = this.abscissa;
+        var modes = ["list", "form", "graph"];
         var views = [];
         _.each(modes, function(mode) {
             var view = [false, mode];
@@ -456,7 +357,7 @@ openerp.web_graph.GraphView = openerp.web.View.extend({
         });
         this.do_action({
             "res_model" : this.dataset.model,
-            "domain" : this.dataset.domain,
+            "domain" : [[record_id, '=', id], ['id','in',this.dataset.ids]],
             "views" : views,
             "type" : "ir.actions.act_window",
             "auto_search" : true,
@@ -472,18 +373,18 @@ openerp.web_graph.GraphView = openerp.web.View.extend({
             contexts: contexts,
             group_by_seq: groupbys
         }, function (results) {
-            // TODO: handle non-empty results.group_by with read_group
-            if(results.group_by  && results.group_by != ''){
-                self.chart_info_fields = results.group_by[0];
-            }else{
-                self.chart_info_fields = self.chart_info;
+            // TODO: handle non-empty results.group_by with read_group?
+            if(!_(results.group_by).isEmpty()){
+                self.abscissa = results.group_by[0];
+            } else {
+                self.abscissa = self.first_field;
             }
-            self.dataset.context = results.context;
-            self.dataset.domain = results.domain;
-            self.dataset.read_slice([],{}, $.proxy(self, 'load_chart'));
+            self.dataset.read_slice(self.list_fields(), {
+                context: results.context,
+                domain: results.domain
+            }, $.proxy(self, 'schedule_chart'));
         });
     }
 });
-// here you may tweak globals object, if any, and play with on_* or do_* callbacks on them
 };
 // vim:et fdc=0 fdl=0: