content: Disable impl-side painting on Windows.
[chromium-blink-merge.git] / ipc / message_filter_router.cc
blob81e40289147be468578c3574cbc79054993f4e51
1 // Copyright 2014 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.
5 #include "ipc/message_filter_router.h"
7 #include "ipc/ipc_message_macros.h"
8 #include "ipc/ipc_message_utils.h"
9 #include "ipc/message_filter.h"
11 namespace IPC {
13 namespace {
15 bool TryFiltersImpl(MessageFilterRouter::MessageFilters& filters,
16 const IPC::Message& message) {
17 for (size_t i = 0; i < filters.size(); ++i) {
18 if (filters[i]->OnMessageReceived(message)) {
19 return true;
22 return false;
25 bool RemoveFilterImpl(MessageFilterRouter::MessageFilters& filters,
26 MessageFilter* filter) {
27 MessageFilterRouter::MessageFilters::iterator it =
28 std::remove(filters.begin(), filters.end(), filter);
29 if (it == filters.end())
30 return false;
32 filters.erase(it, filters.end());
33 return true;
36 bool ValidMessageClass(int message_class) {
37 return message_class >= 0 && message_class < LastIPCMsgStart;
40 } // namespace
42 MessageFilterRouter::MessageFilterRouter() {}
43 MessageFilterRouter::~MessageFilterRouter() {}
45 void MessageFilterRouter::AddFilter(MessageFilter* filter) {
46 // Determine if the filter should be applied to all messages, or only
47 // messages of a certain class.
48 std::vector<uint32> supported_message_classes;
49 if (filter->GetSupportedMessageClasses(&supported_message_classes)) {
50 DCHECK(!supported_message_classes.empty());
51 for (size_t i = 0; i < supported_message_classes.size(); ++i) {
52 const int message_class = supported_message_classes[i];
53 DCHECK(ValidMessageClass(message_class));
54 // Safely ignore repeated subscriptions to a given message class for the
55 // current filter being added.
56 if (!message_class_filters_[message_class].empty() &&
57 message_class_filters_[message_class].back() == filter) {
58 continue;
60 message_class_filters_[message_class].push_back(filter);
62 } else {
63 global_filters_.push_back(filter);
67 void MessageFilterRouter::RemoveFilter(MessageFilter* filter) {
68 if (RemoveFilterImpl(global_filters_, filter))
69 return;
71 for (size_t i = 0; i < arraysize(message_class_filters_); ++i)
72 RemoveFilterImpl(message_class_filters_[i], filter);
75 bool MessageFilterRouter::TryFilters(const Message& message) {
76 if (TryFiltersImpl(global_filters_, message))
77 return true;
79 const int message_class = IPC_MESSAGE_CLASS(message);
80 if (!ValidMessageClass(message_class))
81 return false;
83 return TryFiltersImpl(message_class_filters_[message_class], message);
86 void MessageFilterRouter::Clear() {
87 global_filters_.clear();
88 for (size_t i = 0; i < arraysize(message_class_filters_); ++i)
89 message_class_filters_[i].clear();
92 } // namespace IPC