blob: 82d04139a3bb4dd1c3168c972f8d944899124c4f [file] [log] [blame]
// Copyright (c) 2012 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 "content/common/swapped_out_messages.h"
#include "content/common/accessibility_messages.h"
#include "content/common/frame_messages.h"
#include "content/common/input_messages.h"
#include "content/common/view_messages.h"
#include "content/public/common/content_client.h"
#include "content/shell/common/shell_messages.h"
namespace content {
bool SwappedOutMessages::CanSendWhileSwappedOut(const IPC::Message* msg) {
// We filter out most IPC messages when swapped out. However, some are
// important (e.g., ACKs) for keeping the browser and renderer state
// consistent in case we later return to the same renderer.
switch (msg->type()) {
// Handled by RenderWidgetHost.
case InputHostMsg_HandleInputEvent_ACK::ID:
case ViewHostMsg_UpdateRect::ID:
// Allow targeted navigations while swapped out.
case FrameHostMsg_OpenURL::ID:
case ViewHostMsg_Focus::ID:
// Handled by RenderViewHost.
case ViewHostMsg_ClosePage_ACK::ID:
case ViewHostMsg_SwapCompositorFrame::ID:
// Handled by WorkerMessageFilter (or by SharedWorkerMessageFilter when
// embedded-shared-worker is enabled).
case ViewHostMsg_DocumentDetached::ID:
// Allow cross-process JavaScript calls.
case ViewHostMsg_RouteCloseEvent::ID:
// Handled by RenderFrameHost.
case FrameHostMsg_BeforeUnload_ACK::ID:
case FrameHostMsg_SwapOut_ACK::ID:
case FrameHostMsg_RenderProcessGone::ID:
// Frame detach must occur after the RenderView has swapped out.
case FrameHostMsg_Detach::ID:
case FrameHostMsg_DomOperationResponse::ID:
case FrameHostMsg_CompositorFrameSwappedACK::ID:
case FrameHostMsg_ReclaimCompositorResources::ID:
// Input events propagate from parent to child.
case FrameHostMsg_ForwardInputEvent::ID:
case FrameHostMsg_InitializeChildFrame::ID:
// The browser should always have an accurate mirror of the renderer's
// notion of the current page id.
case FrameHostMsg_DidAssignPageId::ID:
// A swapped-out frame's opener might be updated with
case FrameHostMsg_DidChangeOpener::ID:
// Used in layout tests; handled in BlinkTestController.
case ShellViewHostMsg_PrintMessage::ID:
return true;
// Check with the embedder as well.
ContentClient* client = GetContentClient();
return client->CanSendWhileSwappedOut(msg);
bool SwappedOutMessages::CanHandleWhileSwappedOut(
const IPC::Message& msg) {
// Any message the renderer is allowed to send while swapped out should
// be handled by the browser.
if (CanSendWhileSwappedOut(&msg))
return true;
// We drop most other messages that arrive from a swapped out renderer.
// However, some are important (e.g., ACKs) for keeping the browser and
// renderer state consistent in case we later return to the renderer.
// Note that synchronous messages that are not handled will receive an
// error reply instead, to avoid leaving the renderer in a stuck state.
switch (msg.type()) {
// Sends an ACK.
case ViewHostMsg_ShowView::ID:
// Sends an ACK.
case ViewHostMsg_ShowWidget::ID:
// Sends an ACK.
case ViewHostMsg_ShowFullscreenWidget::ID:
// Updates browser state.
case ViewHostMsg_RenderViewReady::ID:
// Updates the previous navigation entry.
case ViewHostMsg_UpdateState::ID:
// Sends an ACK.
case ViewHostMsg_UpdateTargetURL::ID:
// We allow closing even if we are in the process of swapping out.
case ViewHostMsg_Close::ID:
// Sends an ACK.
case ViewHostMsg_RequestMove::ID:
// Sends an ACK.
case AccessibilityHostMsg_Events::ID:
return true;
return false;
} // namespace content