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_EQ(1ul, vector.size());
+  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 {
-  PendingRequest(PermissionType permission,
-                 content::RenderFrameHost* render_frame_host)
-    : permission(permission),
+  PendingRequest(content::RenderFrameHost* render_frame_host,
+                 const GURL& requesting_origin,
+                 const std::vector<PermissionType> permissions,
+                 const base::Callback<void(
+                     const std::vector<PermissionStatus>&)>& callback)
+    : pending_responses(permissions.size()),
       render_process_id(render_frame_host->GetProcess()->GetID()),
-      render_frame_id(render_frame_host->GetRoutingID()) {
+      render_frame_id(render_frame_host->GetRoutingID()),
+      requesting_origin(requesting_origin),
+      callback(callback),
+      permissions(permissions),
+      result(permissions.size(), content::PERMISSION_STATUS_DENIED) {
   }
 
-  PermissionType permission;
+  void SetPermission(int type_index, PermissionStatus status) {
+    result[type_index] = status;
+    pending_responses--;
+  }
+
+  bool IsComplete() {
+    return pending_responses == 0;
+  }
+
+  size_t pending_responses;
   int render_process_id;
   int render_frame_id;
+  const GURL requesting_origin;
+  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 kNoPendingOperation;
-  }
+  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);
+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) {
+  if (permissions.empty()) {
+    callback.Run(std::vector<PermissionStatus>());
     return kNoPendingOperation;
   }
 
   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 kNoPendingOperation;
-  }
+  GURL embedding_origin = web_contents->GetLastCommittedURL().GetOrigin();
 
   PendingRequest* pending_request = new PendingRequest(
-      permission, render_frame_host);
+      render_frame_host, requesting_origin, permissions, callback);
   int request_id = pending_requests_.Add(pending_request);
-  const PermissionRequestID request(pending_request->render_process_id,
-                                    pending_request->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));
+  const PermissionRequestID request(render_frame_host, request_id);
+
+  for (size_t i = 0; i < permissions.size(); ++i) {
+    const PermissionType permission = permissions[i];
+
+    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));
+  }
   return request_id;
 }
 
-void PermissionManager::OnPermissionRequestResponse(
+void PermissionManager::OnPermissionsRequestResponse(
     int request_id,
-    const base::Callback<void(PermissionStatus)>& callback,
+    int type_index,
     ContentSetting content_setting) {
-  pending_requests_.Remove(request_id);
-  callback.Run(ContentSettingToPermissionStatus(content_setting));
+  OnPermissionsRequestResponseStatus(request_id, type_index,
+      ContentSettingToPermissionStatus(content_setting));
 }
 
-void PermissionManager::CancelPermissionRequest(
-    PermissionType permission,
-    content::RenderFrameHost* render_frame_host,
+void PermissionManager::OnPermissionsRequestResponseStatus(
     int request_id,
-    const GURL& requesting_origin) {
+    int type_index,
+    PermissionStatus status) {
+  PendingRequest* pending_request = pending_requests_.Lookup(request_id);
+  pending_request->SetPermission(type_index, status);
+
+  if (pending_request->IsComplete()) {
+    pending_request->callback.Run(pending_request->result);
+    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_, permission);
-  if (!context)
+  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;
+  }
 
-  content::WebContents* web_contents =
-      content::WebContents::FromRenderFrameHost(render_frame_host);
-  if (IsPermissionBubbleManagerMissing(web_contents))
-    return;
-
-  int render_process_id = render_frame_host->GetProcess()->GetID();
-  int render_frame_id = render_frame_host->GetRoutingID();
-  const PermissionRequestID request(render_process_id,
-                                    render_frame_id,
+  const PermissionRequestID request(pending_request->render_process_id,
+                                    pending_request->render_frame_id,
                                     request_id);
-
-  context->CancelPermissionRequest(web_contents, request);
+  for (PermissionType permission : pending_request->permissions) {
+    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();
 }