chrome/browser/extensions/api/declarative_content/declarative_content_condition_tracker_delegate.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_DECLARATIVE_CONTENT_CONDITION_TRACKER_DELEGATE_H_
   6 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_CONDITION_TRACKER_DELEGATE_H_
   7
   8 #include "base/macros.h"
   9
  10 namespace content {
  11 class BrowserContext;
  12 class WebContents;
  13 }
  14
  15 namespace extensions {
  16
  17 // Interface that allows the declarative content condition trackers to request
  18 // condition evaluation.
  19 class DeclarativeContentConditionTrackerDelegate {
  20  public:
  21   // Requests re-evaluation of conditions for |contents|. This must be called
  22   // whenever the URL or page state changes, even if the value of the condition
  23   // itself doesn't change.
  24   virtual void RequestEvaluation(content::WebContents* contents) = 0;
  25
  26   // Returns true if the evaluator should manage condition state for |context|.
  27   virtual bool ShouldManageConditionsForBrowserContext(
  28       content::BrowserContext* context) = 0;
  29
  30  protected:
  31   DeclarativeContentConditionTrackerDelegate();
  32   virtual ~DeclarativeContentConditionTrackerDelegate();
  33
  34  private:
  35   DISALLOW_COPY_AND_ASSIGN(DeclarativeContentConditionTrackerDelegate);
  36 };
  37
  38 }  // namespace extensions
  39
  40 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_CONDITION_TRACKER_DELEGATE_H_