chrome/browser/extensions/api/declarative_content/content_condition.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_CONDITION_H_
   6 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_CONDITION_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/scoped_vector.h"
  13 #include "chrome/browser/extensions/api/declarative_content/content_predicate_evaluator.h"
  14
  15 namespace base {
  16 class Value;
  17 }
  18
  19 namespace extensions {
  20
  21 class Extension;
  22
  23 // Representation of a condition in the Declarative Content API. A condition
  24 // consists of a set of predicates on the page state, all of which must be
  25 // satisified for the condition to be fulfilled.
  26 //
  27 // For example, given the sample code at
  28 // https://developer.chrome.com/extensions/declarativeContent#rules, the entity
  29 // rule1['conditions'][0] is represented by a ContentCondition.
  30 struct ContentCondition {
  31  public:
  32   explicit ContentCondition(ScopedVector<const ContentPredicate> predicates);
  33   ~ContentCondition();
  34
  35   ScopedVector<const ContentPredicate> predicates;
  36
  37  private:
  38   DISALLOW_COPY_AND_ASSIGN(ContentCondition);
  39 };
  40
  41 // Factory function that instantiates a ContentCondition according to the
  42 // description |condition|, which should be an instance of
  43 // declarativeContent.PageStateMatcher from the Declarative Content
  44 // API. |predicate_factories| maps attribute names in the API to factories that
  45 // create the corresponding predicate.
  46 scoped_ptr<ContentCondition> CreateContentCondition(
  47     const Extension* extension,
  48     const std::map<std::string, ContentPredicateFactory*>& predicate_factories,
  49     const base::Value& condition,
  50     std::string* error);
  51
  52 }  // namespace extensions
  53
  54 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_CONDITION_H_