src/components/navigation_interception/intercept_navigation_delegate.h

   1 // Copyright (c) 2012 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 COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_DELEGATE_H_
   6 #define COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_DELEGATE_H_
   7
   8 #include "base/android/jni_weak_ref.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/supports_user_data.h"
  11
  12 class GURL;
  13
  14 namespace content {
  15 class ResourceThrottle;
  16 class WebContents;
  17 }
  18
  19 namespace net {
  20 class URLRequest;
  21 }
  22
  23 namespace navigation_interception {
  24
  25 class NavigationParams;
  26
  27 // Native side of the InterceptNavigationDelegate Java interface.
  28 // This is used to create a InterceptNavigationResourceThrottle that calls the
  29 // Java interface method to determine whether a navigation should be ignored or
  30 // not.
  31 // To us this class:
  32 // 1) the Java-side interface implementation must be associated (via the
  33 //    Associate method) with a WebContents for which URLRequests are to be
  34 //    intercepted,
  35 // 2) the ResourceThrottle obtained via CreateThrottleFor must be associated
  36 //    with the URLRequests in the ResourceDispatcherHostDelegate
  37 //    implementation.
  38 class InterceptNavigationDelegate : public base::SupportsUserData::Data {
  39  public:
  40   InterceptNavigationDelegate(JNIEnv* env, jobject jdelegate);
  41   virtual ~InterceptNavigationDelegate();
  42
  43   // Associates the InterceptNavigationDelegate with a WebContents using the
  44   // SupportsUserData mechanism.
  45   // As implied by the use of scoped_ptr, the WebContents will assume ownership
  46   // of |delegate|.
  47   static void Associate(content::WebContents* web_contents,
  48                         scoped_ptr<InterceptNavigationDelegate> delegate);
  49   // Gets the InterceptNavigationDelegate associated with the WebContents,
  50   // can be null.
  51   static InterceptNavigationDelegate* Get(content::WebContents* web_contents);
  52
  53   // Creates a InterceptNavigationResourceThrottle that will direct all
  54   // callbacks to the InterceptNavigationDelegate.
  55   static content::ResourceThrottle* CreateThrottleFor(
  56       net::URLRequest* request);
  57
  58   virtual bool ShouldIgnoreNavigation(
  59       const NavigationParams& navigation_params);
  60  private:
  61   JavaObjectWeakGlobalRef weak_jdelegate_;
  62 };
  63
  64 bool RegisterInterceptNavigationDelegate(JNIEnv* env);
  65
  66 }  // namespace navigation_interception
  67
  68 #endif  // COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_DELEGATE_H_