extensions/common/event_matcher.cc

   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 #include "base/callback.h"
   6
   7 #include "extensions/common/event_matcher.h"
   8
   9 #include "extensions/common/event_filtering_info.h"
  10
  11 namespace {
  12 const char kUrlFiltersKey[] = "url";
  13 const char kWindowTypesKey[] = "windowTypes";
  14 }
  15
  16 namespace extensions {
  17
  18 const char kEventFilterServiceTypeKey[] = "serviceType";
  19
  20 EventMatcher::EventMatcher(scoped_ptr<base::DictionaryValue> filter,
  21                            int routing_id)
  22     : filter_(filter.Pass()),
  23       routing_id_(routing_id) {
  24 }
  25
  26 EventMatcher::~EventMatcher() {
  27 }
  28
  29 bool EventMatcher::MatchNonURLCriteria(
  30     const EventFilteringInfo& event_info) const {
  31   if (event_info.has_instance_id()) {
  32     return event_info.instance_id() == GetInstanceID();
  33   }
  34
  35   if (event_info.has_window_type()) {
  36     for (int i = 0; i < GetWindowTypeCount(); i++) {
  37       std::string window_type;
  38       if (GetWindowType(i, &window_type) &&
  39           window_type == event_info.window_type())
  40         return true;
  41     }
  42     return false;
  43   }
  44
  45   if (event_info.has_window_exposed_by_default()) {
  46     // An event with a |window_exposed_by_default| set is only
  47     // relevant to the listener if no window type filter is set.
  48     if (HasWindowTypes())
  49       return false;
  50     return event_info.window_exposed_by_default();
  51   }
  52
  53   const std::string& service_type_filter = GetServiceTypeFilter();
  54   return service_type_filter.empty() ||
  55          service_type_filter == event_info.service_type();
  56 }
  57
  58 int EventMatcher::GetURLFilterCount() const {
  59   base::ListValue* url_filters = nullptr;
  60   if (filter_->GetList(kUrlFiltersKey, &url_filters))
  61     return url_filters->GetSize();
  62   return 0;
  63 }
  64
  65 bool EventMatcher::GetURLFilter(int i, base::DictionaryValue** url_filter_out) {
  66   base::ListValue* url_filters = nullptr;
  67   if (filter_->GetList(kUrlFiltersKey, &url_filters)) {
  68     return url_filters->GetDictionary(i, url_filter_out);
  69   }
  70   return false;
  71 }
  72
  73 bool EventMatcher::HasURLFilters() const {
  74   return GetURLFilterCount() != 0;
  75 }
  76
  77 std::string EventMatcher::GetServiceTypeFilter() const {
  78   std::string service_type_filter;
  79   filter_->GetStringASCII(kEventFilterServiceTypeKey, &service_type_filter);
  80   return service_type_filter;
  81 }
  82
  83 int EventMatcher::GetInstanceID() const {
  84   int instance_id = 0;
  85   filter_->GetInteger("instanceId", &instance_id);
  86   return instance_id;
  87 }
  88
  89 int EventMatcher::GetWindowTypeCount() const {
  90   base::ListValue* window_type_filters = nullptr;
  91   if (filter_->GetList(kWindowTypesKey, &window_type_filters))
  92     return window_type_filters->GetSize();
  93   return 0;
  94 }
  95
  96 bool EventMatcher::GetWindowType(int i, std::string* window_type_out) const {
  97   base::ListValue* window_types = nullptr;
  98   if (filter_->GetList(kWindowTypesKey, &window_types)) {
  99     return window_types->GetString(i, window_type_out);
 100   }
 101   return false;
 102 }
 103
 104 bool EventMatcher::HasWindowTypes() const {
 105   return GetWindowTypeCount() != 0;
 106 }
 107
 108 int EventMatcher::GetRoutingID() const {
 109   return routing_id_;
 110 }
 111
 112 }  // namespace extensions