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accessibility_extension_api.cc
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accessibility_extension_api.cc
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// 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 "chrome/browser/accessibility/accessibility_extension_api.h"
#include <stddef.h>
#include <memory>
#include <set>
#include <vector>
#include "base/json/json_writer.h"
#include "base/strings/string_number_conversions.h"
#include "base/values.h"
#include "build/build_config.h"
#include "chrome/browser/extensions/api/tabs/tabs_constants.h"
#include "chrome/browser/extensions/chrome_extension_function_details.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_tab_util.h"
#include "chrome/browser/infobars/infobar_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/api/accessibility_private.h"
#include "chrome/common/extensions/extension_constants.h"
#include "components/infobars/core/confirm_infobar_delegate.h"
#include "components/infobars/core/infobar.h"
#include "content/public/browser/browser_accessibility_state.h"
#include "content/public/common/service_manager_connection.h"
#include "extensions/browser/event_router.h"
#include "extensions/browser/extension_system.h"
#include "extensions/common/error_utils.h"
#include "extensions/common/image_util.h"
#include "extensions/common/manifest_handlers/background_info.h"
#include "services/service_manager/public/cpp/connector.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/keycodes/keyboard_codes.h"
#if defined(OS_CHROMEOS)
#include "ash/public/interfaces/accessibility_controller.mojom.h"
#include "ash/public/interfaces/accessibility_focus_ring_controller.mojom.h"
#include "ash/public/interfaces/constants.mojom.h"
#include "ash/public/interfaces/event_rewriter_controller.mojom.h"
#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
#include "chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h"
#include "services/ws/public/mojom/constants.mojom.h"
#include "services/ws/public/mojom/event_injector.mojom.h"
#include "ui/base/ui_base_features.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#endif
namespace accessibility_private = extensions::api::accessibility_private;
namespace {
const char kErrorNotSupported[] = "This API is not supported on this platform.";
#if defined(OS_CHROMEOS)
ash::mojom::AccessibilityControllerPtr GetAccessibilityController() {
// Connect to the accessibility mojo interface in ash.
ash::mojom::AccessibilityControllerPtr accessibility_controller;
content::ServiceManagerConnection::GetForProcess()
->GetConnector()
->BindInterface(ash::mojom::kServiceName, &accessibility_controller);
return accessibility_controller;
}
#endif
} // namespace
ExtensionFunction::ResponseAction
AccessibilityPrivateSetNativeAccessibilityEnabledFunction::Run() {
bool enabled = false;
EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
if (enabled) {
content::BrowserAccessibilityState::GetInstance()->
EnableAccessibility();
} else {
content::BrowserAccessibilityState::GetInstance()->
DisableAccessibility();
}
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateSetFocusRingFunction::Run() {
#if defined(OS_CHROMEOS)
std::unique_ptr<extensions::api::accessibility_private::SetFocusRing::Params>
params(
extensions::api::accessibility_private::SetFocusRing::Params::Create(
*args_));
EXTENSION_FUNCTION_VALIDATE(params);
std::vector<gfx::Rect> rects;
for (const extensions::api::accessibility_private::ScreenRect& rect :
params->rects) {
rects.push_back(gfx::Rect(rect.left, rect.top, rect.width, rect.height));
}
auto* accessibility_manager = chromeos::AccessibilityManager::Get();
if (params->color) {
SkColor color;
if (!extensions::image_util::ParseHexColorString(*(params->color), &color))
return RespondNow(Error("Could not parse hex color"));
accessibility_manager->SetFocusRingColor(color, extension_id());
} else {
accessibility_manager->ResetFocusRingColor(extension_id());
}
// Move the visible focus ring to cover all of these rects.
accessibility_manager->SetFocusRing(
rects, ash::mojom::FocusRingBehavior::PERSIST_FOCUS_RING, extension_id());
// Also update the touch exploration controller so that synthesized
// touch events are anchored within the focused object.
if (!rects.empty()) {
chromeos::AccessibilityManager* manager =
chromeos::AccessibilityManager::Get();
manager->SetTouchAccessibilityAnchorPoint(rects[0].CenterPoint());
}
return RespondNow(NoArguments());
#endif // defined(OS_CHROMEOS)
return RespondNow(Error(kErrorNotSupported));
}
ExtensionFunction::ResponseAction
AccessibilityPrivateSetHighlightsFunction::Run() {
#if defined(OS_CHROMEOS)
std::unique_ptr<extensions::api::accessibility_private::SetHighlights::Params>
params(
extensions::api::accessibility_private::SetHighlights::Params::Create(
*args_));
EXTENSION_FUNCTION_VALIDATE(params);
std::vector<gfx::Rect> rects;
for (const extensions::api::accessibility_private::ScreenRect& rect :
params->rects) {
rects.push_back(gfx::Rect(rect.left, rect.top, rect.width, rect.height));
}
SkColor color;
if (!extensions::image_util::ParseHexColorString(params->color, &color))
return RespondNow(Error("Could not parse hex color"));
// Set the highlights to cover all of these rects.
chromeos::AccessibilityManager::Get()->SetHighlights(rects, color);
return RespondNow(NoArguments());
#endif // defined(OS_CHROMEOS)
return RespondNow(Error(kErrorNotSupported));
}
ExtensionFunction::ResponseAction
AccessibilityPrivateSetKeyboardListenerFunction::Run() {
ChromeExtensionFunctionDetails details(this);
CHECK(extension());
#if defined(OS_CHROMEOS)
bool enabled;
bool capture;
EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(1, &capture));
chromeos::AccessibilityManager* manager =
chromeos::AccessibilityManager::Get();
const std::string current_id = manager->keyboard_listener_extension_id();
if (!current_id.empty() && extension()->id() != current_id)
return RespondNow(Error("Existing keyboard listener registered."));
manager->SetKeyboardListenerExtensionId(
enabled ? extension()->id() : std::string(), details.GetProfile());
ash::mojom::EventRewriterControllerPtr event_rewriter_controller_ptr;
content::ServiceManagerConnection* connection =
content::ServiceManagerConnection::GetForProcess();
connection->GetConnector()->BindInterface(ash::mojom::kServiceName,
&event_rewriter_controller_ptr);
event_rewriter_controller_ptr->CaptureAllKeysForSpokenFeedback(enabled &&
capture);
return RespondNow(NoArguments());
#endif // defined OS_CHROMEOS
return RespondNow(Error(kErrorNotSupported));
}
ExtensionFunction::ResponseAction
AccessibilityPrivateDarkenScreenFunction::Run() {
#if defined(OS_CHROMEOS)
bool darken = false;
EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &darken));
chromeos::AccessibilityManager::Get()->SetDarkenScreen(darken);
return RespondNow(NoArguments());
#else
return RespondNow(Error(kErrorNotSupported));
#endif
}
#if defined(OS_CHROMEOS)
ExtensionFunction::ResponseAction
AccessibilityPrivateSetSwitchAccessKeysFunction::Run() {
std::unique_ptr<accessibility_private::SetSwitchAccessKeys::Params> params =
accessibility_private::SetSwitchAccessKeys::Params::Create(*args_);
EXTENSION_FUNCTION_VALIDATE(params);
GetAccessibilityController()->SetSwitchAccessKeysToCapture(params->key_codes);
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateSetNativeChromeVoxArcSupportForCurrentAppFunction::Run() {
std::unique_ptr<
accessibility_private::SetNativeChromeVoxArcSupportForCurrentApp::Params>
params = accessibility_private::
SetNativeChromeVoxArcSupportForCurrentApp::Params::Create(*args_);
EXTENSION_FUNCTION_VALIDATE(params);
ChromeExtensionFunctionDetails details(this);
arc::ArcAccessibilityHelperBridge* bridge =
arc::ArcAccessibilityHelperBridge::GetForBrowserContext(
details.GetProfile());
if (bridge) {
bool enabled;
EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
bridge->SetNativeChromeVoxArcSupport(enabled);
}
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateSendSyntheticKeyEventFunction::Run() {
std::unique_ptr<accessibility_private::SendSyntheticKeyEvent::Params> params =
accessibility_private::SendSyntheticKeyEvent::Params::Create(*args_);
EXTENSION_FUNCTION_VALIDATE(params);
accessibility_private::SyntheticKeyboardEvent* key_data = ¶ms->key_event;
int modifiers = 0;
if (key_data->modifiers.get()) {
if (key_data->modifiers->ctrl && *key_data->modifiers->ctrl)
modifiers |= ui::EF_CONTROL_DOWN;
if (key_data->modifiers->alt && *key_data->modifiers->alt)
modifiers |= ui::EF_ALT_DOWN;
if (key_data->modifiers->search && *key_data->modifiers->search)
modifiers |= ui::EF_COMMAND_DOWN;
if (key_data->modifiers->shift && *key_data->modifiers->shift)
modifiers |= ui::EF_SHIFT_DOWN;
}
std::unique_ptr<ui::KeyEvent> synthetic_key_event =
std::make_unique<ui::KeyEvent>(
key_data->type ==
accessibility_private::SYNTHETIC_KEYBOARD_EVENT_TYPE_KEYUP
? ui::ET_KEY_RELEASED
: ui::ET_KEY_PRESSED,
static_cast<ui::KeyboardCode>(key_data->key_code),
static_cast<ui::DomCode>(0), modifiers);
ws::mojom::EventInjectorPtr event_injector_ptr;
content::ServiceManagerConnection* connection =
content::ServiceManagerConnection::GetForProcess();
connection->GetConnector()->BindInterface(ws::mojom::kServiceName,
&event_injector_ptr);
event_injector_ptr->InjectEventNoAckNoRewriters(
display::Screen::GetScreen()->GetPrimaryDisplay().id(),
std::move(synthetic_key_event));
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateEnableChromeVoxMouseEventsFunction::Run() {
bool enabled = false;
EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
ash::mojom::EventRewriterControllerPtr event_rewriter_controller_ptr;
content::ServiceManagerConnection* connection =
content::ServiceManagerConnection::GetForProcess();
connection->GetConnector()->BindInterface(ash::mojom::kServiceName,
&event_rewriter_controller_ptr);
event_rewriter_controller_ptr->SetSendMouseEventsToDelegate(enabled);
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateSendSyntheticMouseEventFunction::Run() {
std::unique_ptr<accessibility_private::SendSyntheticMouseEvent::Params>
params = accessibility_private::SendSyntheticMouseEvent::Params::Create(
*args_);
EXTENSION_FUNCTION_VALIDATE(params);
accessibility_private::SyntheticMouseEvent* mouse_data = ¶ms->mouse_event;
// TODO(crbug/893752) Choose correct display
display::Display display = display::Screen::GetScreen()->GetPrimaryDisplay();
int x = (int)(mouse_data->x * display.device_scale_factor());
int y = (int)(mouse_data->y * display.device_scale_factor());
gfx::Point location(x, y);
ui::EventType type;
switch (mouse_data->type) {
case accessibility_private::SYNTHETIC_MOUSE_EVENT_TYPE_PRESS:
type = ui::ET_MOUSE_PRESSED;
break;
case accessibility_private::SYNTHETIC_MOUSE_EVENT_TYPE_RELEASE:
type = ui::ET_MOUSE_RELEASED;
break;
case accessibility_private::SYNTHETIC_MOUSE_EVENT_TYPE_DRAG:
type = ui::ET_MOUSE_DRAGGED;
break;
case accessibility_private::SYNTHETIC_MOUSE_EVENT_TYPE_MOVE:
type = ui::ET_MOUSE_MOVED;
break;
case accessibility_private::SYNTHETIC_MOUSE_EVENT_TYPE_ENTER:
type = ui::ET_MOUSE_ENTERED;
break;
case accessibility_private::SYNTHETIC_MOUSE_EVENT_TYPE_EXIT:
type = ui::ET_MOUSE_EXITED;
break;
default:
NOTREACHED();
}
int flags = ui::EF_LEFT_MOUSE_BUTTON;
std::unique_ptr<ui::MouseEvent> synthetic_mouse_event =
std::make_unique<ui::MouseEvent>(type, location, location,
ui::EventTimeForNow(), flags,
flags /* changed_button_flags */);
ws::mojom::EventInjectorPtr event_injector_ptr;
content::ServiceManagerConnection* connection =
content::ServiceManagerConnection::GetForProcess();
connection->GetConnector()->BindInterface(ws::mojom::kServiceName,
&event_injector_ptr);
event_injector_ptr->InjectEventNoAckNoRewriters(
display.id(), std::move(synthetic_mouse_event));
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateOnSelectToSpeakStateChangedFunction::Run() {
std::unique_ptr<accessibility_private::OnSelectToSpeakStateChanged::Params>
params =
accessibility_private::OnSelectToSpeakStateChanged::Params::Create(
*args_);
EXTENSION_FUNCTION_VALIDATE(params);
accessibility_private::SelectToSpeakState params_state = params->state;
ash::mojom::SelectToSpeakState state;
switch (params_state) {
case accessibility_private::SelectToSpeakState::
SELECT_TO_SPEAK_STATE_SELECTING:
state = ash::mojom::SelectToSpeakState::kSelectToSpeakStateSelecting;
break;
case accessibility_private::SelectToSpeakState::
SELECT_TO_SPEAK_STATE_SPEAKING:
state = ash::mojom::SelectToSpeakState::kSelectToSpeakStateSpeaking;
break;
case accessibility_private::SelectToSpeakState::
SELECT_TO_SPEAK_STATE_INACTIVE:
case accessibility_private::SelectToSpeakState::SELECT_TO_SPEAK_STATE_NONE:
state = ash::mojom::SelectToSpeakState::kSelectToSpeakStateInactive;
}
auto* accessibility_manager = chromeos::AccessibilityManager::Get();
accessibility_manager->OnSelectToSpeakStateChanged(state);
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateToggleDictationFunction::Run() {
ash::mojom::DictationToggleSource source =
ash::mojom::DictationToggleSource::kChromevox;
if (extension()->id() == extension_misc::kSwitchAccessExtensionId)
source = ash::mojom::DictationToggleSource::kSwitchAccess;
else if (extension()->id() == extension_misc::kChromeVoxExtensionId)
source = ash::mojom::DictationToggleSource::kChromevox;
else
NOTREACHED();
GetAccessibilityController()->ToggleDictationFromSource(source);
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateSetSwitchAccessMenuStateFunction::Run() {
std::unique_ptr<accessibility_private::SetSwitchAccessMenuState::Params>
params = accessibility_private::SetSwitchAccessMenuState::Params::Create(
*args_);
EXTENSION_FUNCTION_VALIDATE(params);
bool show_menu = params->show;
extensions::api::accessibility_private::ScreenRect elem =
std::move(params->element_bounds);
gfx::Rect element_bounds(elem.left, elem.top, elem.width, elem.height);
if (show_menu)
chromeos::AccessibilityManager::Get()->ShowSwitchAccessMenu(element_bounds);
else
chromeos::AccessibilityManager::Get()->HideSwitchAccessMenu();
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AccessibilityPrivateForwardKeyEventsToSwitchAccessFunction::Run() {
std::unique_ptr<accessibility_private::ForwardKeyEventsToSwitchAccess::Params>
params =
accessibility_private::ForwardKeyEventsToSwitchAccess::Params::Create(
*args_);
EXTENSION_FUNCTION_VALIDATE(params);
GetAccessibilityController()->ForwardKeyEventsToSwitchAccess(
params->should_forward);
return RespondNow(NoArguments());
}
#endif // defined (OS_CHROMEOS)