electron/patches/chromium/mas_disable_remote_accessibility.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cheng Zhao <zcbenz@gmail.com>
Date: Thu, 20 Sep 2018 17:48:49 -0700
Subject: mas: avoid usage of NSAccessibilityRemoteUIElement

According to ccameron:

NSAccessibilityRemoteUIElement is unnecessary for Electron's use-case. We use it
for progressive web apps (where the AXTree is in the browser process, but macOS
needs to think it's coming from the PWA process). I think it can just be chopped
out -- if there are any side-effects, we should be able to work around them.

diff --git a/components/remote_cocoa/app_shim/application_bridge.mm b/components/remote_cocoa/app_shim/application_bridge.mm
index 306db835fe203f663b1d84dd3490b619eb3f60b2..7a41d7afe6197e0a78934206782b1063f77f707a 100644
--- a/components/remote_cocoa/app_shim/application_bridge.mm
+++ b/components/remote_cocoa/app_shim/application_bridge.mm
@@ -51,6 +51,7 @@
 
   // NativeWidgetNSWindowHostHelper:
   id GetNativeViewAccessible() override {
+#ifndef MAS_BUILD
     if (!remote_accessibility_element_) {
       int64_t browser_pid = 0;
       std::vector<uint8_t> element_token;
@@ -61,6 +62,9 @@ id GetNativeViewAccessible() override {
           ui::RemoteAccessibility::GetRemoteElementFromToken(element_token);
     }
     return remote_accessibility_element_.get();
+#else
+    return nil;
+#endif
   }
   void DispatchKeyEvent(ui::KeyEvent* event) override {
     bool event_handled = false;
@@ -99,8 +103,10 @@ void GetWordAt(const gfx::Point& location_in_content,
   mojo::AssociatedRemote<mojom::TextInputHost> text_input_host_remote_;
 
   std::unique_ptr<NativeWidgetNSWindowBridge> bridge_;
+#ifndef MAS_BUILD
   base::scoped_nsobject<NSAccessibilityRemoteUIElement>
       remote_accessibility_element_;
+#endif
 };
 
 }  // namespace
diff --git a/components/remote_cocoa/app_shim/native_widget_ns_window_bridge.mm b/components/remote_cocoa/app_shim/native_widget_ns_window_bridge.mm
index 34721e51d0ebe3a99751bba88b0afe026a910cc6..3a415dd6daf655c31ceb6fd6d307dc6e96c9aced 100644
--- a/components/remote_cocoa/app_shim/native_widget_ns_window_bridge.mm
+++ b/components/remote_cocoa/app_shim/native_widget_ns_window_bridge.mm
@@ -582,10 +582,12 @@ NSUInteger CountBridgedWindows(NSArray* child_windows) {
   // this should be treated as an error and caught early.
   CHECK(bridged_view_);
 
+#ifndef MAS_BUILD
   // Send the accessibility tokens for the NSView now that it exists.
   host_->SetRemoteAccessibilityTokens(
       ui::RemoteAccessibility::GetTokenForLocalElement(window_),
       ui::RemoteAccessibility::GetTokenForLocalElement(bridged_view_));
+#endif
 
   // Beware: This view was briefly removed (in favor of a bare CALayer) in
   // crrev/c/1236675. The ordering of unassociated layers relative to NSView
diff --git a/content/app_shim_remote_cocoa/ns_view_bridge_factory_impl.mm b/content/app_shim_remote_cocoa/ns_view_bridge_factory_impl.mm
index 60e99da4a9493dbaca871b08d75341a48488a65e..3328e9e90bd4904dd404b413fd4245f4fb37ae38 100644
--- a/content/app_shim_remote_cocoa/ns_view_bridge_factory_impl.mm
+++ b/content/app_shim_remote_cocoa/ns_view_bridge_factory_impl.mm
@@ -74,8 +74,10 @@ id GetFocusedBrowserAccessibilityElement() override {
     return nil;
   }
   void SetAccessibilityWindow(NSWindow* window) override {
+#ifndef MAS_BUILD
     host_->SetRemoteAccessibilityWindowToken(
         ui::RemoteAccessibility::GetTokenForLocalElement(window));
+#endif
   }
 
   void ForwardKeyboardEvent(const content::NativeWebKeyboardEvent& key_event,
@@ -137,8 +139,10 @@ void SmartMagnify(const blink::WebGestureEvent& web_event) override {
 
   mojo::AssociatedRemote<mojom::RenderWidgetHostNSViewHost> host_;
   std::unique_ptr<RenderWidgetHostNSViewBridge> bridge_;
+#ifndef MAS_BUILD
   base::scoped_nsobject<NSAccessibilityRemoteUIElement>
       remote_accessibility_element_;
+#endif
 };
 }
 
diff --git a/content/browser/accessibility/browser_accessibility_manager_mac.mm b/content/browser/accessibility/browser_accessibility_manager_mac.mm
index f61b04b02673e9a73f9c23823017a56b65b47dee..297b5c5584e9221adf11515c015fd7f413d29aab 100644
--- a/content/browser/accessibility/browser_accessibility_manager_mac.mm
+++ b/content/browser/accessibility/browser_accessibility_manager_mac.mm
@@ -21,7 +21,9 @@
 #include "ui/accelerated_widget_mac/accelerated_widget_mac.h"
 #include "ui/accessibility/ax_role_properties.h"
 #include "ui/accessibility/platform/ax_private_webkit_constants_mac.h"
+#ifndef MAS_BUILD
 #include "ui/base/cocoa/remote_accessibility_api.h"
+#endif
 
 namespace {
 
@@ -609,6 +611,7 @@ void PostAnnouncementNotification(NSString* announcement) {
   if ([NSApp isActive])
     return window == [NSApp accessibilityFocusedWindow];
 
+#ifndef MAS_BUILD
   // TODO(accessibility): We need a solution to the problem described below.
   // If the window is NSAccessibilityRemoteUIElement, there are some challenges:
   // 1. NSApp is the browser which spawned the PWA, and what it considers the
@@ -636,6 +639,7 @@ void PostAnnouncementNotification(NSString* announcement) {
   // from within the app shim content.
   if ([window isKindOfClass:[NSAccessibilityRemoteUIElement class]])
     return true;
+#endif
 
   return false;
 }
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.h b/content/browser/renderer_host/render_widget_host_view_mac.h
index a27ce05f20a8d645688c5bb920d36e76901e2b37..cb4238fe7d5f2d182c742532cf467880db7b309e 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.h
+++ b/content/browser/renderer_host/render_widget_host_view_mac.h
@@ -51,7 +51,9 @@ class ScopedPasswordInputEnabler;
 
 @protocol RenderWidgetHostViewMacDelegate;
 
+#ifndef MAS_BUILD
 @class NSAccessibilityRemoteUIElement;
+#endif
 @class RenderWidgetHostViewCocoa;
 
 namespace content {
@@ -665,10 +667,12 @@ class CONTENT_EXPORT RenderWidgetHostViewMac
   // EnsureSurfaceSynchronizedForWebTest().
   uint32_t latest_capture_sequence_number_ = 0u;
 
+#ifndef MAS_BUILD
   // Remote accessibility objects corresponding to the NSWindow that this is
   // displayed to the user in.
   base::scoped_nsobject<NSAccessibilityRemoteUIElement>
       remote_window_accessible_;
+#endif
 
   // Used to force the NSApplication's focused accessibility element to be the
   // content::BrowserAccessibilityCocoa accessibility tree when the NSView for
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 6975087ef6cc6483aa0d8c301cedfb126d471e11..fc7c4474aaa74000b901b93b26bb46d7a7dc07a3 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -258,8 +258,10 @@
 void RenderWidgetHostViewMac::MigrateNSViewBridge(
     remote_cocoa::mojom::Application* remote_cocoa_application,
     uint64_t parent_ns_view_id) {
+#ifndef MAS_BUILD
   // Destroy the previous remote accessibility element.
   remote_window_accessible_.reset();
+#endif
 
   // Disconnect from the previous bridge (this will have the effect of
   // destroying the associated bridge), and close the receiver (to allow it
@@ -1555,8 +1557,10 @@ void CombineTextNodesAndMakeCallback(SpeechCallback callback,
 
 gfx::NativeViewAccessible
 RenderWidgetHostViewMac::AccessibilityGetNativeViewAccessibleForWindow() {
+#ifndef MAS_BUILD
   if (remote_window_accessible_)
     return remote_window_accessible_.get();
+#endif
   return [GetInProcessNSView() window];
 }
 
@@ -1600,9 +1604,11 @@ void CombineTextNodesAndMakeCallback(SpeechCallback callback,
 }
 
 void RenderWidgetHostViewMac::SetAccessibilityWindow(NSWindow* window) {
+#ifndef MAS_BUILD
   // When running in-process, just use the NSView's NSWindow as its own
   // accessibility element.
   remote_window_accessible_.reset();
+#endif
 }
 
 bool RenderWidgetHostViewMac::SyncIsWidgetForMainFrame(
@@ -2097,12 +2103,14 @@ void CombineTextNodesAndMakeCallback(SpeechCallback callback,
 
 void RenderWidgetHostViewMac::SetRemoteAccessibilityWindowToken(
     const std::vector<uint8_t>& window_token) {
+#ifndef MAS_BUILD
   if (window_token.empty()) {
     remote_window_accessible_.reset();
   } else {
     remote_window_accessible_ =
         ui::RemoteAccessibility::GetRemoteElementFromToken(window_token);
   }
+#endif
 }
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/ui/base/BUILD.gn b/ui/base/BUILD.gn
index 7fc550eb16288cc5f4152362504a621abbaec3da..6be133c45a9b8c774b9f6e1e2de492c43bac33d3 100644
--- a/ui/base/BUILD.gn
+++ b/ui/base/BUILD.gn
@@ -341,6 +341,13 @@ component("base") {
     sources += [ "resource/resource_bundle_lacros.cc" ]
   }
 
+  if (is_mas_build) {
+    sources -= [
+      "cocoa/remote_accessibility_api.h",
+      "cocoa/remote_accessibility_api.mm",
+    ]
+  }
+
   if (is_ios) {
     sources += [
       "device_form_factor_ios.mm",
diff --git a/ui/base/cocoa/remote_accessibility_api.h b/ui/base/cocoa/remote_accessibility_api.h
index e7adfee3210ec723c687adfcc4bee8827ef643e7..25a924a47eeb30d783ef83dbb4896c4bed139a27 100644
--- a/ui/base/cocoa/remote_accessibility_api.h
+++ b/ui/base/cocoa/remote_accessibility_api.h
@@ -11,6 +11,8 @@
 #include "base/component_export.h"
 #include "base/mac/scoped_nsobject.h"
 
+#ifndef MAS_BUILD
+
 @interface NSAccessibilityRemoteUIElement : NSObject
 + (void)registerRemoteUIProcessIdentifier:(int)pid;
 + (NSData*)remoteTokenForLocalUIElement:(id)element;
@@ -32,4 +34,6 @@ class COMPONENT_EXPORT(UI_BASE) RemoteAccessibility {
 
 }  // namespace ui
 
+#endif  // MAS_BUILD
+
 #endif  // UI_BASE_COCOA_REMOTE_ACCESSIBILITY_API_H_
diff --git a/ui/views/cocoa/native_widget_mac_ns_window_host.h b/ui/views/cocoa/native_widget_mac_ns_window_host.h
index fc847f1ae010e4e0d69836f16d83515b8a92073a..a4bebe5078ace6c49cb34912813bbaf76b43b00c 100644
--- a/ui/views/cocoa/native_widget_mac_ns_window_host.h
+++ b/ui/views/cocoa/native_widget_mac_ns_window_host.h
@@ -32,7 +32,9 @@
 #include "ui/views/window/dialog_observer.h"
 
 @class NativeWidgetMacNSWindow;
+#ifndef MAS_BUILD
 @class NSAccessibilityRemoteUIElement;
+#endif
 @class NSView;
 
 namespace remote_cocoa {
@@ -447,11 +449,13 @@ class VIEWS_EXPORT NativeWidgetMacNSWindowHost
   mojo::AssociatedRemote<remote_cocoa::mojom::NativeWidgetNSWindow>
       remote_ns_window_remote_;
 
+#ifndef MAS_BUILD
   // Remote accessibility objects corresponding to the NSWindow and its root
   // NSView.
   base::scoped_nsobject<NSAccessibilityRemoteUIElement>
       remote_window_accessible_;
   base::scoped_nsobject<NSAccessibilityRemoteUIElement> remote_view_accessible_;
+#endif
 
   // Used to force the NSApplication's focused accessibility element to be the
   // views::Views accessibility tree when the NSView for this is focused.
diff --git a/ui/views/cocoa/native_widget_mac_ns_window_host.mm b/ui/views/cocoa/native_widget_mac_ns_window_host.mm
index 0ca869c22670d057362132b30c704876e1d4d850..839a6777ebd596f41467fd90c725eea374bf9a0a 100644
--- a/ui/views/cocoa/native_widget_mac_ns_window_host.mm
+++ b/ui/views/cocoa/native_widget_mac_ns_window_host.mm
@@ -295,14 +295,22 @@ void HandleAccelerator(const ui::Accelerator& accelerator,
 NativeWidgetMacNSWindowHost::GetNativeViewAccessibleForNSView() const {
   if (in_process_ns_window_bridge_)
     return in_process_ns_window_bridge_->ns_view();
+#ifndef MAS_BUILD
   return remote_view_accessible_.get();
+#else
+  return nullptr;
+#endif
 }
 
 gfx::NativeViewAccessible
 NativeWidgetMacNSWindowHost::GetNativeViewAccessibleForNSWindow() const {
   if (in_process_ns_window_bridge_)
     return in_process_ns_window_bridge_->ns_window();
+#ifndef MAS_BUILD
   return remote_window_accessible_.get();
+#else
+  return nullptr;
+#endif
 }
 
 remote_cocoa::mojom::NativeWidgetNSWindow*
@@ -1261,6 +1269,7 @@ void HandleAccelerator(const ui::Accelerator& accelerator,
 void NativeWidgetMacNSWindowHost::SetRemoteAccessibilityTokens(
     const std::vector<uint8_t>& window_token,
     const std::vector<uint8_t>& view_token) {
+#ifndef MAS_BUILD
   remote_window_accessible_ =
       ui::RemoteAccessibility::GetRemoteElementFromToken(window_token);
   remote_view_accessible_ =
@@ -1268,14 +1277,17 @@ void HandleAccelerator(const ui::Accelerator& accelerator,
   [remote_view_accessible_ setWindowUIElement:remote_window_accessible_.get()];
   [remote_view_accessible_
       setTopLevelUIElement:remote_window_accessible_.get()];
+#endif
 }
 
 bool NativeWidgetMacNSWindowHost::GetRootViewAccessibilityToken(
     int64_t* pid,
     std::vector<uint8_t>* token) {
+#ifndef MAS_BUILD
   *pid = getpid();
   id element_id = GetNativeViewAccessible();
   *token = ui::RemoteAccessibility::GetTokenForLocalElement(element_id);
+#endif
   return true;
 }