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