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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/accessibility/accessibility_event_rewriter_delegate_impl.h"
#include "ash/public/cpp/accessibility_controller_enums.h"
#include "ash/public/cpp/event_rewriter_controller.h"
#include "chrome/browser/ash/accessibility/accessibility_manager.h"
#include "chrome/browser/ash/accessibility/event_handler_common.h"
#include "chrome/browser/ui/aura/accessibility/automation_manager_aura.h"
#include "chrome/common/extensions/api/accessibility_private.h"
#include "chrome/common/extensions/extension_constants.h"
#include "components/input/native_web_keyboard_event.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/event_router.h"
#include "extensions/browser/extension_host.h"
#include "extensions/common/constants.h"
#include "ui/accessibility/accessibility_features.h"
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/events/event.h"
#include "ui/events/event_constants.h"
namespace ash {
namespace {
std::string ToString(SwitchAccessCommand command) {
switch (command) {
case SwitchAccessCommand::kSelect:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::SwitchAccessCommand::kSelect);
case SwitchAccessCommand::kNext:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::SwitchAccessCommand::kNext);
case SwitchAccessCommand::kPrevious:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::SwitchAccessCommand::
kPrevious);
case SwitchAccessCommand::kNone:
NOTREACHED();
}
}
std::string ToString(MagnifierCommand command) {
switch (command) {
case MagnifierCommand::kMoveStop:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::MagnifierCommand::kMoveStop);
case MagnifierCommand::kMoveUp:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::MagnifierCommand::kMoveUp);
case MagnifierCommand::kMoveDown:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::MagnifierCommand::kMoveDown);
case MagnifierCommand::kMoveLeft:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::MagnifierCommand::kMoveLeft);
case MagnifierCommand::kMoveRight:
return extensions::api::accessibility_private::ToString(
extensions::api::accessibility_private::MagnifierCommand::kMoveRight);
}
return "";
}
} // namespace
AccessibilityEventRewriterDelegateImpl::
AccessibilityEventRewriterDelegateImpl() = default;
AccessibilityEventRewriterDelegateImpl::
~AccessibilityEventRewriterDelegateImpl() = default;
void AccessibilityEventRewriterDelegateImpl::DispatchKeyEventToChromeVox(
std::unique_ptr<ui::Event> event,
bool capture) {
extensions::ExtensionHost* host =
::features::IsAccessibilityManifestV3EnabledForChromeVox()
? GetAccessibilityOffscreenDocumentHost(
extension_misc::kChromeVoxExtensionId)
: GetAccessibilityExtensionHost(
extension_misc::kChromeVoxExtensionId);
if (!host)
return;
// Listen for any unhandled keyboard events from ChromeVox's background page
// when capturing keys to reinject.
host->host_contents()->SetDelegate(capture ? this : nullptr);
// Forward the event to ChromeVox's background page.
ForwardKeyToExtension(*(event->AsKeyEvent()), host);
}
void AccessibilityEventRewriterDelegateImpl::DispatchMouseEvent(
std::unique_ptr<ui::Event> event) {
ax::mojom::Event event_type;
bool is_synthesized = event->IsSynthesized() ||
event->source_device_id() == ui::ED_UNKNOWN_DEVICE;
switch (event->type()) {
case ui::EventType::kMouseMoved:
event_type = ax::mojom::Event::kMouseMoved;
break;
case ui::EventType::kMouseDragged:
event_type = ax::mojom::Event::kMouseDragged;
break;
default:
NOTREACHED();
}
AutomationManagerAura::GetInstance()->HandleEvent(
event_type, /*from_user=*/!is_synthesized);
}
void AccessibilityEventRewriterDelegateImpl::SendSwitchAccessCommand(
SwitchAccessCommand command) {
extensions::EventRouter* event_router =
extensions::EventRouter::Get(AccessibilityManager::Get()->profile());
base::Value::List event_args;
event_args.Append(ToString(command));
auto event = std::make_unique<extensions::Event>(
extensions::events::ACCESSIBILITY_PRIVATE_ON_SWITCH_ACCESS_COMMAND,
extensions::api::accessibility_private::OnSwitchAccessCommand::kEventName,
std::move(event_args));
event_router->DispatchEventWithLazyListener(
extension_misc::kSwitchAccessExtensionId, std::move(event));
}
void AccessibilityEventRewriterDelegateImpl::SendPointScanPoint(
const gfx::PointF& point) {
extensions::EventRouter* event_router =
extensions::EventRouter::Get(AccessibilityManager::Get()->profile());
base::Value::Dict point_dict;
point_dict.Set("x", point.x());
point_dict.Set("y", point.y());
base::Value::List event_args;
event_args.Append(std::move(point_dict));
auto event = std::make_unique<extensions::Event>(
extensions::events::ACCESSIBILITY_PRIVATE_ON_POINT_SCAN_SET,
extensions::api::accessibility_private::OnPointScanSet::kEventName,
std::move(event_args));
event_router->DispatchEventWithLazyListener(
extension_misc::kSwitchAccessExtensionId, std::move(event));
}
void AccessibilityEventRewriterDelegateImpl::SendMagnifierCommand(
MagnifierCommand command) {
extensions::EventRouter* event_router =
extensions::EventRouter::Get(AccessibilityManager::Get()->profile());
base::Value::List event_args;
event_args.Append(ToString(command));
auto event = std::make_unique<extensions::Event>(
extensions::events::ACCESSIBILITY_PRIVATE_ON_SWITCH_ACCESS_COMMAND,
extensions::api::accessibility_private::OnMagnifierCommand::kEventName,
std::move(event_args));
event_router->DispatchEventWithLazyListener(
extension_misc::kAccessibilityCommonExtensionId, std::move(event));
}
void AccessibilityEventRewriterDelegateImpl::OnUnhandledSpokenFeedbackEvent(
std::unique_ptr<ui::Event> event) const {
EventRewriterController::Get()->OnUnhandledSpokenFeedbackEvent(
std::move(event));
}
bool AccessibilityEventRewriterDelegateImpl::HandleKeyboardEvent(
content::WebContents* source,
const input::NativeWebKeyboardEvent& event) {
OnUnhandledSpokenFeedbackEvent(event.os_event->Clone());
return true;
}
} // namespace ash
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