summaryrefslogtreecommitdiffstats
path: root/dom/base/UserActivation.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'dom/base/UserActivation.cpp')
-rw-r--r--dom/base/UserActivation.cpp127
1 files changed, 127 insertions, 0 deletions
diff --git a/dom/base/UserActivation.cpp b/dom/base/UserActivation.cpp
new file mode 100644
index 0000000000..95dc5fc7d0
--- /dev/null
+++ b/dom/base/UserActivation.cpp
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/UserActivation.h"
+
+#include "mozilla/TextEvents.h"
+
+namespace mozilla::dom {
+
+namespace {
+
+// The current depth of user and keyboard inputs. sUserInputEventDepth
+// is the number of any user input events, page load events and mouse over
+// events. sUserKeyboardEventDepth is the number of keyboard input events.
+// Incremented whenever we start handling a user input, decremented when we
+// have finished handling a user input. This depth is *not* reset in case
+// of nested event loops.
+static int32_t sUserInputEventDepth = 0;
+static int32_t sUserKeyboardEventDepth = 0;
+
+// Time at which we began handling user input. Reset to the epoch
+// once we have finished handling user input.
+static TimeStamp sHandlingInputStart;
+
+// Time at which we began handling the latest user input. Not reset
+// at the end of the input.
+static TimeStamp sLatestUserInputStart;
+
+} // namespace
+
+/* static */
+bool UserActivation::IsHandlingUserInput() { return sUserInputEventDepth > 0; }
+
+/* static */
+bool UserActivation::IsHandlingKeyboardInput() {
+ return sUserKeyboardEventDepth > 0;
+}
+
+/* static */
+bool UserActivation::IsUserInteractionEvent(const WidgetEvent* aEvent) {
+ if (!aEvent->IsTrusted()) {
+ return false;
+ }
+
+ switch (aEvent->mMessage) {
+ // eKeyboardEventClass
+ case eKeyPress:
+ case eKeyDown:
+ case eKeyUp:
+ // Not all keyboard events are treated as user input, so that popups
+ // can't be opened, fullscreen mode can't be started, etc at
+ // unexpected time.
+ return aEvent->AsKeyboardEvent()->CanTreatAsUserInput();
+ // eBasicEventClass
+ // eMouseEventClass
+ case eMouseClick:
+ case eMouseDown:
+ case eMouseUp:
+ // ePointerEventClass
+ case ePointerDown:
+ case ePointerUp:
+ // eTouchEventClass
+ case eTouchStart:
+ case eTouchEnd:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/* static */
+void UserActivation::StartHandlingUserInput(EventMessage aMessage) {
+ ++sUserInputEventDepth;
+ if (sUserInputEventDepth == 1) {
+ sLatestUserInputStart = sHandlingInputStart = TimeStamp::Now();
+ }
+ if (WidgetEvent::IsKeyEventMessage(aMessage)) {
+ ++sUserKeyboardEventDepth;
+ }
+}
+
+/* static */
+void UserActivation::StopHandlingUserInput(EventMessage aMessage) {
+ --sUserInputEventDepth;
+ if (sUserInputEventDepth == 0) {
+ sHandlingInputStart = TimeStamp();
+ }
+ if (WidgetEvent::IsKeyEventMessage(aMessage)) {
+ --sUserKeyboardEventDepth;
+ }
+}
+
+/* static */
+TimeStamp UserActivation::GetHandlingInputStart() {
+ return sHandlingInputStart;
+}
+
+/* static */
+TimeStamp UserActivation::LatestUserInputStart() {
+ return sLatestUserInputStart;
+}
+
+//-----------------------------------------------------------------------------
+// mozilla::dom::AutoHandlingUserInputStatePusher
+//-----------------------------------------------------------------------------
+
+AutoHandlingUserInputStatePusher::AutoHandlingUserInputStatePusher(
+ bool aIsHandlingUserInput, WidgetEvent* aEvent)
+ : mMessage(aEvent ? aEvent->mMessage : eVoidEvent),
+ mIsHandlingUserInput(aIsHandlingUserInput) {
+ if (!aIsHandlingUserInput) {
+ return;
+ }
+ UserActivation::StartHandlingUserInput(mMessage);
+}
+
+AutoHandlingUserInputStatePusher::~AutoHandlingUserInputStatePusher() {
+ if (!mIsHandlingUserInput) {
+ return;
+ }
+ UserActivation::StopHandlingUserInput(mMessage);
+}
+
+} // namespace mozilla::dom