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// Copyright (c) 2010 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/extensions/extension_tabs_module.h"
#include "base/json/json_writer.h"
#include "base/stl_util-inl.h"
#include "base/string_util.h"
#include "base/values.h"
#include "chrome/browser/browser_list.h"
#include "chrome/browser/browser_window.h"
#include "chrome/browser/extensions/extension_accessibility_api.h"
#include "chrome/browser/extensions/extension_accessibility_api_constants.h"
#include "chrome/browser/extensions/extension_event_router.h"
#include "chrome/browser/extensions/extension_function_dispatcher.h"
#include "chrome/browser/extensions/extensions_service.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/notification_service.h"
namespace keys = extension_accessibility_api_constants;
// Returns the AccessibilityControlInfo serialized into a JSON string,
// consisting of an array of a single object of type AccessibilityObject,
// as defined in the accessibility extension api's json schema.
std::string ControlInfoToJsonString(const AccessibilityControlInfo* info) {
ListValue args;
DictionaryValue* dict = new DictionaryValue();
info->SerializeToDict(dict);
args.Append(dict);
std::string json_args;
base::JSONWriter::Write(&args, false, &json_args);
return json_args;
}
ExtensionAccessibilityEventRouter*
ExtensionAccessibilityEventRouter::GetInstance() {
return Singleton<ExtensionAccessibilityEventRouter>::get();
}
ExtensionAccessibilityEventRouter::ExtensionAccessibilityEventRouter()
: enabled_(false) {}
ExtensionAccessibilityEventRouter::~ExtensionAccessibilityEventRouter() {
STLDeleteElements(&on_enabled_listeners_);
STLDeleteElements(&on_disabled_listeners_);
}
void ExtensionAccessibilityEventRouter::ObserveProfile(Profile* profile) {
last_focused_control_dict_.Clear();
if (registrar_.IsEmpty()) {
registrar_.Add(this,
NotificationType::ACCESSIBILITY_WINDOW_OPENED,
NotificationService::AllSources());
registrar_.Add(this,
NotificationType::ACCESSIBILITY_WINDOW_CLOSED,
NotificationService::AllSources());
registrar_.Add(this,
NotificationType::ACCESSIBILITY_CONTROL_FOCUSED,
NotificationService::AllSources());
registrar_.Add(this,
NotificationType::ACCESSIBILITY_CONTROL_ACTION,
NotificationService::AllSources());
registrar_.Add(this,
NotificationType::ACCESSIBILITY_TEXT_CHANGED,
NotificationService::AllSources());
registrar_.Add(this,
NotificationType::ACCESSIBILITY_MENU_OPENED,
NotificationService::AllSources());
registrar_.Add(this,
NotificationType::ACCESSIBILITY_MENU_CLOSED,
NotificationService::AllSources());
}
}
void ExtensionAccessibilityEventRouter::Observe(
NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
switch (type.value) {
case NotificationType::ACCESSIBILITY_WINDOW_OPENED:
OnWindowOpened(Details<const AccessibilityWindowInfo>(details).ptr());
break;
case NotificationType::ACCESSIBILITY_WINDOW_CLOSED:
OnWindowClosed(Details<const AccessibilityWindowInfo>(details).ptr());
break;
case NotificationType::ACCESSIBILITY_CONTROL_FOCUSED:
OnControlFocused(Details<const AccessibilityControlInfo>(details).ptr());
break;
case NotificationType::ACCESSIBILITY_CONTROL_ACTION:
OnControlAction(Details<const AccessibilityControlInfo>(details).ptr());
break;
case NotificationType::ACCESSIBILITY_TEXT_CHANGED:
OnTextChanged(Details<const AccessibilityControlInfo>(details).ptr());
break;
case NotificationType::ACCESSIBILITY_MENU_OPENED:
OnMenuOpened(Details<const AccessibilityMenuInfo>(details).ptr());
break;
case NotificationType::ACCESSIBILITY_MENU_CLOSED:
OnMenuClosed(Details<const AccessibilityMenuInfo>(details).ptr());
break;
default:
NOTREACHED();
}
}
void ExtensionAccessibilityEventRouter::SetAccessibilityEnabled(bool enabled) {
if (enabled_ != enabled) {
enabled_ = enabled;
if (enabled_) {
for (unsigned int i = 0; i < on_enabled_listeners_.size(); i++) {
on_enabled_listeners_[i]->Run();
}
} else {
for (unsigned int i = 0; i < on_disabled_listeners_.size(); i++) {
on_disabled_listeners_[i]->Run();
}
}
}
}
bool ExtensionAccessibilityEventRouter::IsAccessibilityEnabled() const {
return enabled_;
}
void ExtensionAccessibilityEventRouter::AddOnEnabledListener(
Callback* callback) {
on_enabled_listeners_.push_back(callback);
}
void ExtensionAccessibilityEventRouter::AddOnDisabledListener(
Callback* callback) {
on_disabled_listeners_.push_back(callback);
}
void ExtensionAccessibilityEventRouter::OnWindowOpened(
const AccessibilityWindowInfo* info) {
std::string json_args = ControlInfoToJsonString(info);
DispatchEvent(info->profile(), keys::kOnWindowOpened, json_args);
}
void ExtensionAccessibilityEventRouter::OnWindowClosed(
const AccessibilityWindowInfo* info) {
std::string json_args = ControlInfoToJsonString(info);
DispatchEvent(info->profile(), keys::kOnWindowClosed, json_args);
}
void ExtensionAccessibilityEventRouter::OnControlFocused(
const AccessibilityControlInfo* info) {
last_focused_control_dict_.Clear();
info->SerializeToDict(&last_focused_control_dict_);
std::string json_args = ControlInfoToJsonString(info);
DispatchEvent(info->profile(), keys::kOnControlFocused, json_args);
}
void ExtensionAccessibilityEventRouter::OnControlAction(
const AccessibilityControlInfo* info) {
std::string json_args = ControlInfoToJsonString(info);
DispatchEvent(info->profile(), keys::kOnControlAction, json_args);
}
void ExtensionAccessibilityEventRouter::OnTextChanged(
const AccessibilityControlInfo* info) {
std::string json_args = ControlInfoToJsonString(info);
DispatchEvent(info->profile(), keys::kOnTextChanged, json_args);
}
void ExtensionAccessibilityEventRouter::OnMenuOpened(
const AccessibilityMenuInfo* info) {
std::string json_args = ControlInfoToJsonString(info);
DispatchEvent(info->profile(), keys::kOnMenuOpened, json_args);
}
void ExtensionAccessibilityEventRouter::OnMenuClosed(
const AccessibilityMenuInfo* info) {
std::string json_args = ControlInfoToJsonString(info);
DispatchEvent(info->profile(), keys::kOnMenuClosed, json_args);
}
void ExtensionAccessibilityEventRouter::DispatchEvent(
Profile* profile,
const char* event_name,
const std::string& json_args) {
if (enabled_ && profile && profile->GetExtensionEventRouter()) {
profile->GetExtensionEventRouter()->DispatchEventToRenderers(
event_name, json_args, NULL, GURL());
}
}
bool SetAccessibilityEnabledFunction::RunImpl() {
bool enabled;
EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
ExtensionAccessibilityEventRouter::GetInstance()
->SetAccessibilityEnabled(enabled);
return true;
}
bool GetFocusedControlFunction::RunImpl() {
// Get the serialized dict from the last focused control and return it.
// However, if the dict is empty, that means we haven't seen any focus
// events yet, so return null instead.
ExtensionAccessibilityEventRouter *accessibility_event_router =
ExtensionAccessibilityEventRouter::GetInstance();
DictionaryValue *last_focused_control_dict =
accessibility_event_router->last_focused_control_dict();
if (last_focused_control_dict->size()) {
result_.reset(last_focused_control_dict->DeepCopyWithoutEmptyChildren());
} else {
result_.reset(Value::CreateNullValue());
}
return true;
}
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