Revert revision 33053

third_party/pkg/angular/lib/directive/ng_pluralize.dart

 part of angular.directive;
 
 /**
  * ## Overview
  * `ngPluralize` is a directive that displays messages according to locale rules.
  *
  * You configure ngPluralize directive by specifying the mappings between plural
  * categories and the strings to be displayed.
  *
  * ## Plural categories and explicit number rules
  * The available plural categories are:
  * * "zero",
  * * "one",
  * * "two",
  * * "few",
  * * "many",
  * * "other".
  *
- * While a plural category may match many numbers, an explicit number rule can
- * only match one number. For example, the explicit number rule for "3" matches
- * the number 3. There are examples of plural categories and explicit number
- * rules throughout the rest of this documentation.
+ * While a plural category may match many numbers, an explicit number rule can only match
+ * one number. For example, the explicit number rule for "3" matches the number 3. There
+ * are examples of plural categories and explicit number rules throughout the rest of this
+ * documentation.
  *
  * ## Configuring ngPluralize
  * You configure ngPluralize by providing 2 attributes: `count` and `when`.
  * You can also provide an optional attribute, `offset`.
  *
- * The value of the `count` attribute can be either a string or an expression;
- * these are evaluated on the current scope for its bound value.
+ * The value of the `count` attribute can be either a string or an expression; these are
+ * evaluated on the current scope for its bound value.
  *
- * The `when` attribute specifies the mappings between plural categories and the
- * actual string to be displayed. The value of the attribute should be a JSON
- * object.
+ * The `when` attribute specifies the mappings between plural categories and the actual
+ * string to be displayed. The value of the attribute should be a JSON object.
  *
  * The following example shows how to configure ngPluralize:
  *
  *    <ng-pluralize count="personCount"
  *                  when="{'0': 'Nobody is viewing.',
  *                         'one': '1 person is viewing.',
  *                         'other': '{} people are viewing.'}">
  *    </ng-pluralize>
  *
- * In the example, `"0: Nobody is viewing."` is an explicit number rule. If you
- * did not specify this rule, 0 would be matched to the "other" category and
- * "0 people are viewing" would be shown instead of "Nobody is viewing". You can
- * specify an explicit number rule for other numbers, for example 12, so that
- * instead of showing "12 people are viewing", you can show "a dozen people are
- * viewing".
+ * In the example, `"0: Nobody is viewing."` is an explicit number rule. If you did not
+ * specify this rule, 0 would be matched to the "other" category and "0 people are viewing"
+ * would be shown instead of "Nobody is viewing". You can specify an explicit number rule for
+ * other numbers, for example 12, so that instead of showing "12 people are viewing", you can
+ * show "a dozen people are viewing".
  *
- * You can use a set of closed braces (`{}`) as a placeholder for the number
- * that you want substituted into pluralized strings. In the previous example,
- * Angular will replace `{}` with `{{personCount}}`. The closed braces `{}` is a
- * placeholder {{numberExpression}}.
+ * You can use a set of closed braces (`{}`) as a placeholder for the number that you want substituted
+ * into pluralized strings. In the previous example, Angular will replace `{}` with
+ * `{{personCount}}`. The closed braces `{}` is a placeholder {{numberExpression}}.
  *
  * ## Configuring ngPluralize with offset
- * The `offset` attribute allows further customization of pluralized text, which
- * can result in a better user experience. For example, instead of the message
- * "4 people are viewing this document", you might display "John, Kate and 2
- * others are viewing this document". The offset attribute allows you to offset
- * a number by any desired value.
- *
+ * The `offset` attribute allows further customization of pluralized text, which can result in
+ * a better user experience. For example, instead of the message "4 people are viewing this document",
+ * you might display "John, Kate and 2 others are viewing this document".
+ * The offset attribute allows you to offset a number by any desired value.
  * Let's take a look at an example:
  *
  *    <ng-pluralize count="personCount" offset=2
  *                  when="{'0': 'Nobody is viewing.',
- *                         '1': '${person1} is viewing.',
- *                         '2': '${person1} and ${person2} are viewing.',
- *                         'one': '${person1}, ${person2} and one other person are viewing.',
- *                         'other': '${person1}, ${person2} and {} other people are viewing.'}">
+ *                         '1': '{{person1}} is viewing.',
+ *                         '2': '{{person1}} and {{person2}} are viewing.',
+ *                         'one': '{{person1}}, {{person2}} and one other person are viewing.',
+ *                         'other': '{{person1}}, {{person2}} and {} other people are viewing.'}">
  *    </ng-pluralize>
  *
  * Notice that we are still using two plural categories(one, other), but we added
  * three explicit number rules 0, 1 and 2.
- * When one person, perhaps John, views the document, "John is viewing" will be
- * shown. When three people view the document, no explicit number rule is found,
- * so an offset of 2 is taken off 3, and Angular uses 1 to decide the plural
- * category. In this case, plural category 'one' is matched and "John, Marry and
- * one other person are viewing" is shown.
+ * When one person, perhaps John, views the document, "John is viewing" will be shown.
+ * When three people view the document, no explicit number rule is found, so
+ * an offset of 2 is taken off 3, and Angular uses 1 to decide the plural category.
+ * In this case, plural category 'one' is matched and "John, Marry and one other person are viewing"
+ * is shown.
  *
- * Note that when you specify offsets, you must provide explicit number rules
- * for numbers from 0 up to and including the offset. If you use an offset of 3,
- * for example, you must provide explicit number rules for 0, 1, 2 and 3. You
- * must also provide plural strings for at least the "other" plural category.
+ * Note that when you specify offsets, you must provide explicit number rules for
+ * numbers from 0 up to and including the offset. If you use an offset of 3, for example,
+ * you must provide explicit number rules for 0, 1, 2 and 3. You must also provide plural strings for
+ * at least the "other" plural category.
  */
-@NgDirective(
+ @NgDirective(
     selector: 'ng-pluralize',
     map: const { 'count': '=>count' })
 @NgDirective(
     selector: '[ng-pluralize]',
     map: const { 'count': '=>count' })
 class NgPluralizeDirective {
+
   final dom.Element element;
   final Scope scope;
   final Interpolate interpolate;
-  final AstParser parser;
   int offset;
-  var discreteRules = <String, String>{};
-  var categoryRules = <Symbol, String>{};
+  Map<String, String> discreteRules = new Map();
+  Map<Symbol, String> categoryRules = new Map();
+  static final RegExp IS_WHEN = new RegExp(r'^when-(minus-)?.');
 
-  static final RegExp IS_WHEN = new RegExp(r'^when-(minus-)?.');
-  static const Map<String, Symbol> SYMBOLS = const {
-    'zero'  : #zero,
-    'one'   : #one,
-    'two'   : #two,
-    'few'   : #few,
-    'many'  : #many,
-    'other' : #other,
-  };
-
-  NgPluralizeDirective(this.scope, this.element, this.interpolate,
-                       NodeAttrs attributes, this.parser) {
-    Map<String, String> whens = attributes['when'] == null
-        ? {}
-        : scope.eval(attributes['when']);
+  NgPluralizeDirective(this.scope, this.element, this.interpolate, NodeAttrs attributes) {
+    Map<String, String> whens = attributes['when'] == null ? {} : scope.$eval(attributes['when']);
     offset = attributes['offset'] == null ? 0 : int.parse(attributes['offset']);
 
     element.attributes.keys.where((k) => IS_WHEN.hasMatch(k)).forEach((k) {
       var ruleName = k.replaceFirst('when-', '').replaceFirst('minus-', '-');
       whens[ruleName] = element.attributes[k];
     });
 
     if (whens['other'] == null) {
-      throw "ngPluralize error! The 'other' plural category must always be "
-          "specified";
+      throw "ngPluralize error! The 'other' plural category must always be specified";
     }
 
     whens.forEach((k, v) {
-      Symbol symbol = SYMBOLS[k];
-      if (symbol != null) {
-        this.categoryRules[symbol] = v;
+      if (['zero', 'one', 'two', 'few', 'many', 'other'].contains(k)) {
+        this.categoryRules[new Symbol(k.toString())] = v;
       } else {
-        this.discreteRules[k] = v;
+        this.discreteRules[k.toString()] = v;
       }
     });
   }
 
   set count(value) {
     if (value is! num) {
       try {
         value = int.parse(value);
       } catch(e) {
         try {
@@ skipping 14 matching lines @@
       intValue -= offset;
       var exp = Function.apply(Intl.plural, [intValue], categoryRules);
       if (exp != null) {
         exp = exp.replaceAll(r'{}', (value - offset).toString());
         _setAndWatch(exp);
       }
     }
   }
 
   _setAndWatch(expression) {
-    var interpolation = interpolate(expression, false, '\${', '}');
+    Interpolation interpolation = interpolate(expression);
     interpolation.setter = (text) => element.text = text;
     interpolation.setter(expression);
-    var items = interpolation.expressions.map((exp) => parser(exp)).toList();
-    AST ast = new PureFunctionAST(expression, new ArrayFn(), items);
-    scope.watch(ast, interpolation.call);
+    scope.$watchSet(interpolation.watchExpressions, interpolation.call);
   }
 }