browser: implement multiple permission requesting

chrome/browser/permissions/permission_manager.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/permissions/permission_manager.h"
 
 #include "base/callback.h"
 #include "chrome/browser/content_settings/host_content_settings_map_factory.h"
 #include "chrome/browser/permissions/permission_context.h"
 #include "chrome/browser/permissions/permission_context_base.h"
@@ skipping 75 matching lines @@
 // return nullptr in PermissionContext::Get since they don't have a context.
 bool IsConstantPermission(PermissionType type) {
   switch (type) {
     case PermissionType::MIDI:
       return true;
     default:
       return false;
   }
 }
 
+void PermissionRequestResponseCallbackWrapper(
+    const base::Callback<void(PermissionStatus)>& callback,
+    const std::vector<PermissionStatus>& vector) {
+  DCHECK(vector.size() == 1);

[mlamouri (slow - plz ping), 2015/09/23 16:37:37]

nit: DCHECK_EQ()

[Lalit Maganti, 2015/09/24 09:24:11]

Done.

+  callback.Run(vector[0]);
+}
+
 // Function used for handling permission types which do not change their
 // value i.e. they are always approved or always denied etc.
 // CONTENT_SETTING_DEFAULT is returned if the permission needs further handling.
 // This function should only be called when IsConstantPermission has returned
 // true for the PermissionType.
 ContentSetting GetContentSettingForConstantPermission(PermissionType type) {
   DCHECK(IsConstantPermission(type));
   switch (type) {
     case PermissionType::MIDI:
       return CONTENT_SETTING_ALLOW;
     default:
       return CONTENT_SETTING_DEFAULT;
   }
 }
 
 PermissionStatus GetPermissionStatusForConstantPermission(PermissionType type) {
   return ContentSettingToPermissionStatus(
       GetContentSettingForConstantPermission(type));
 }
 
 }  // anonymous namespace
 
 struct PermissionManager::PendingRequest {
-  PermissionType permission;
+  PendingRequest(content::RenderFrameHost* render_frame_host,
+                 const GURL& requesting_origin,
+                 const std::vector<PermissionType> types,
+                 const base::Callback<void(
+                     const std::vector<PermissionStatus>&)>& callback)
+    : render_process_id(render_frame_host->GetProcess()->GetID()),
+      render_frame_id(render_frame_host->GetRoutingID()),
+      requesting_origin(requesting_origin),
+      pending(types.size()),
+      callback(callback),
+      permissions(types),
+      result(permissions.size(), content::PERMISSION_STATUS_DENIED) {
+    // TODO(miguelg, peter) This special case for should go away once
+    // push -> notifications mapping goes away/is changed.
+    bool push_seen = false;
+    for (const PermissionType& type : permissions) {
+      if (type == PermissionType::PUSH_MESSAGING)
+        push_seen = true;
+    }
+    if (!push_seen)
+      return;
+    for (size_t i = 0; i < permissions.size(); ++i) {
+      if (permissions[i] == PermissionType::NOTIFICATIONS)
+        permissions[i] = PermissionType::PUSH_MESSAGING;
+    }
+  }
+
+  // Returns if there are no further pending sub-requests.
+  bool SetPermission(int index, PermissionStatus status) {
+    PermissionType current = permissions[index];
+    for (size_t i = index; i < permissions.size(); ++i) {
+      if (permissions[i] == current) {
+        result[i] = status;
+        pending -= 1;

[mlamouri (slow - plz ping), 2015/09/23 16:37:37]

nit: --pending;

[Lalit Maganti, 2015/09/24 09:24:11]

All changed.

+      }
+    }
+    if (pending == 0)
+      callback.Run(result);
+    return pending == 0;
+  }
+
   int render_process_id;
   int render_frame_id;
+  const GURL requesting_origin;
+  size_t pending;

[mlamouri (slow - plz ping), 2015/09/23 16:37:37]

nit: pending_results?

[Lalit Maganti, 2015/09/24 09:24:11]

Gone.

+  const base::Callback<void(
+      const std::vector<PermissionStatus>&)> callback;
+
+  std::vector<PermissionType> permissions;
+  std::vector<PermissionStatus> result;
 };
 
 struct PermissionManager::Subscription {
   PermissionType permission;
   GURL requesting_origin;
   GURL embedding_origin;
   base::Callback<void(PermissionStatus)> callback;
   ContentSetting current_value;
 };
 
 PermissionManager::PermissionManager(Profile* profile)
     : profile_(profile),
       weak_ptr_factory_(this) {
 }
 
 PermissionManager::~PermissionManager() {
   if (!subscriptions_.IsEmpty())
     HostContentSettingsMapFactory::GetForProfile(profile_)
         ->RemoveObserver(this);
 }
 
 int PermissionManager::RequestPermission(
     PermissionType permission,
     content::RenderFrameHost* render_frame_host,
     const GURL& requesting_origin,
     bool user_gesture,
     const base::Callback<void(PermissionStatus)>& callback) {
-  if (IsConstantPermission(permission)) {
-    callback.Run(GetPermissionStatusForConstantPermission(permission));
-    return kNoPendingRequestOrSubscription;
-  }
+  return RequestPermissions(
+      std::vector<PermissionType>(1, permission),
+      render_frame_host,
+      requesting_origin,
+      user_gesture,
+      base::Bind(&PermissionRequestResponseCallbackWrapper, callback));
+}
 
-  PermissionContextBase* context = PermissionContext::Get(profile_, permission);
-  if (!context) {
-    callback.Run(content::PERMISSION_STATUS_DENIED);
-    return kNoPendingRequestOrSubscription;
-  }
-
+int PermissionManager::RequestPermissions(
+    const std::vector<PermissionType>& permissions,
+    content::RenderFrameHost* render_frame_host,
+    const GURL& requesting_origin,
+    bool user_gesture,
+    const base::Callback<void(
+        const std::vector<PermissionStatus>&)>& callback) {
   content::WebContents* web_contents =
       content::WebContents::FromRenderFrameHost(render_frame_host);
-  if (IsPermissionBubbleManagerMissing(web_contents)) {
-    callback.Run(
-        GetPermissionStatus(permission, requesting_origin,
-                            web_contents->GetLastCommittedURL().GetOrigin()));
-    return kNoPendingRequestOrSubscription;
+  GURL embedding_origin = web_contents->GetLastCommittedURL().GetOrigin();
+
+  PendingRequest* pending_request = new PendingRequest(
+      render_frame_host, requesting_origin, permissions, callback);
+  int request_id = pending_requests_.Add(pending_request);
+  const PermissionRequestID request(render_frame_host, request_id);
+
+  std::set<PermissionType> seen_permissions;
+  for (size_t i = 0; i < permissions.size(); ++i) {
+    // It is important that the pending request be used here as it can change
+    // the PermissionType from the vector that was passed in.
+    // TODO(peter, miguelg) Remove this when push and notifcations are unified.
+    const PermissionType permission = pending_request->permissions[i];
+    if (seen_permissions.find(permission) != seen_permissions.end())
+      continue;
+    seen_permissions.insert(permission);
+
+    if (IsConstantPermission(permission) ||
+        IsPermissionBubbleManagerMissing(web_contents) ||
+        !PermissionContext::Get(profile_, permission)) {
+      OnPermissionsRequestResponseStatus(request_id, i,
+          GetPermissionStatus(
+              permission, requesting_origin, embedding_origin));
+      continue;
+    }
+
+    PermissionContextBase* context = PermissionContext::Get(
+        profile_, permission);
+    context->RequestPermission(
+        web_contents, request, requesting_origin, user_gesture,
+        base::Bind(&PermissionManager::OnPermissionsRequestResponse,
+                   weak_ptr_factory_.GetWeakPtr(), request_id, i));
   }
-
-  int render_process_id = render_frame_host->GetProcess()->GetID();
-  int render_frame_id = render_frame_host->GetRoutingID();
-
-  PendingRequest* pending_request = new PendingRequest();
-  pending_request->render_process_id = render_process_id;
-  pending_request->render_frame_id = render_frame_id;
-  pending_request->permission = permission;
-
-  int request_id = pending_requests_.Add(pending_request);
-  const PermissionRequestID request(render_process_id,
-                                    render_frame_id,
-                                    request_id);
-
-  context->RequestPermission(
-      web_contents, request, requesting_origin, user_gesture,
-      base::Bind(&PermissionManager::OnPermissionRequestResponse,
-                 weak_ptr_factory_.GetWeakPtr(),
-                 request_id,
-                 callback));
   return request_id;
 }
 
-void PermissionManager::OnPermissionRequestResponse(
+void PermissionManager::OnPermissionsRequestResponse(
     int request_id,
-    const base::Callback<void(PermissionStatus)>& callback,
+    int request_index,
     ContentSetting content_setting) {
-  pending_requests_.Remove(request_id);
-  callback.Run(ContentSettingToPermissionStatus(content_setting));
+  OnPermissionsRequestResponseStatus(request_id, request_index,
+      ContentSettingToPermissionStatus(content_setting));
+}
+
+void PermissionManager::OnPermissionsRequestResponseStatus(
+    int request_id,
+    int request_index,
+    PermissionStatus status) {
+  PendingRequest* pending_request = pending_requests_.Lookup(request_id);
+  if (pending_request->SetPermission(request_index, status))
+    pending_requests_.Remove(request_id);
 }
 
 void PermissionManager::CancelPermissionRequest(int request_id) {
   PendingRequest* pending_request = pending_requests_.Lookup(request_id);
   if (!pending_request)
     return;
 
-  PermissionContextBase* context = PermissionContext::Get(
-      profile_, pending_request->permission);
-  if (!context)
-    return;
-
   content::WebContents* web_contents = tab_util::GetWebContentsByFrameID(
       pending_request->render_process_id, pending_request->render_frame_id);
   DCHECK(web_contents);
   if (IsPermissionBubbleManagerMissing(web_contents)) {
     pending_requests_.Remove(request_id);
     return;
   }
 
   const PermissionRequestID request(pending_request->render_process_id,
                                     pending_request->render_frame_id,
                                     request_id);
-  context->CancelPermissionRequest(web_contents, request);
+  std::set<PermissionType> seen_permissions;
+  for (const PermissionType& permission : pending_request->permissions) {
+    if (seen_permissions.find(permission) != seen_permissions.end())
+      continue;
+    seen_permissions.insert(permission);
+
+    PermissionContextBase* context = PermissionContext::Get(
+        profile_, permission);
+    if (!context)
+      continue;
+    context->CancelPermissionRequest(web_contents, request);
+  }
   pending_requests_.Remove(request_id);
 }
 
 void PermissionManager::ResetPermission(PermissionType permission,
                                         const GURL& requesting_origin,
                                         const GURL& embedding_origin) {
   PermissionContextBase* context = PermissionContext::Get(profile_, permission);
   if (!context)
     return;
 
@@ skipping 108 matching lines @@
     // Add the callback to |callbacks| which will be run after the loop to
     // prevent re-entrance issues.
     callbacks.push_back(
         base::Bind(subscription->callback,
                    ContentSettingToPermissionStatus(new_value)));
   }
 
   for (const auto& callback : callbacks)
     callback.Run();
 }