Touch HUD app for mustash

components/mus/ws/window_tree.cc

 // Copyright 2014 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 "components/mus/ws/window_tree.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 1138 matching lines @@
                                   uint32_t observer_id) {
   if (matcher.is_null() || observer_id == 0) {
     // Clear any existing event observer.
     event_observer_matcher_.reset();
     event_observer_id_ = 0;
     return;
   }
 
   // Do not allow key events to be observed, as a compromised app could register
   // itself as an event observer and spy on keystrokes to another app.
-  if (!matcher->type_matcher) {
+  if (!matcher->type_matcher && !matcher->types_matcher) {
     DVLOG(1) << "SetEventObserver must specify an event type.";
     return;
   }
   const ui::mojom::EventType event_type_whitelist[] = {
       ui::mojom::EventType::POINTER_CANCEL, ui::mojom::EventType::POINTER_DOWN,
       ui::mojom::EventType::POINTER_MOVE,   ui::mojom::EventType::POINTER_UP,
       ui::mojom::EventType::MOUSE_EXIT,     ui::mojom::EventType::WHEEL,
   };
   bool allowed = false;
-  for (ui::mojom::EventType event_type : event_type_whitelist) {
-    if (matcher->type_matcher->type == event_type) {
-      allowed = true;
-      break;
+  if (matcher->type_matcher) {
+    for (ui::mojom::EventType event_type : event_type_whitelist) {
+      if (matcher->type_matcher->type == event_type) {
+        allowed = true;
+        break;
+      }
     }
+  } else if (matcher->types_matcher) {
+    bool exist = true;
+    for (ui::mojom::EventType event_type : matcher->types_matcher->types) {
+      if (std::find(std::begin(event_type_whitelist),
+                    std::end(event_type_whitelist), event_type) ==
+          std::end(event_type_whitelist)) {
+        exist = false;
+        break;
+      }
+    }
+    if (exist) allowed = true;
   }
   if (!allowed) {
     DVLOG(1) << "SetEventObserver event type not allowed";
     return;
   }
 
   event_observer_matcher_.reset(new EventMatcher(*matcher));
   event_observer_id_ = observer_id;
 }
 
@@ skipping 343 matching lines @@
 }
 
 bool WindowTree::IsWindowRootOfAnotherTreeForAccessPolicy(
     const ServerWindow* window) const {
   WindowTree* tree = window_server_->GetTreeWithRoot(window);
   return tree && tree != this;
 }
 
 }  // namespace ws
 }  // namespace mus