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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /gfx/layers/apz/util/TouchCounter.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/layers/apz/util/TouchCounter.cpp')
-rw-r--r--gfx/layers/apz/util/TouchCounter.cpp74
1 files changed, 74 insertions, 0 deletions
diff --git a/gfx/layers/apz/util/TouchCounter.cpp b/gfx/layers/apz/util/TouchCounter.cpp
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index 0000000000..9e4d6f1ba6
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+++ b/gfx/layers/apz/util/TouchCounter.cpp
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+/* -*- 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 "TouchCounter.h"
+
+#include "InputData.h"
+#include "mozilla/TouchEvents.h"
+
+namespace mozilla {
+namespace layers {
+
+TouchCounter::TouchCounter() : mActiveTouchCount(0) {}
+
+void TouchCounter::Update(const MultiTouchInput& aInput) {
+ switch (aInput.mType) {
+ case MultiTouchInput::MULTITOUCH_START:
+ // touch-start event contains all active touches of the current session
+ mActiveTouchCount = aInput.mTouches.Length();
+ break;
+ case MultiTouchInput::MULTITOUCH_END:
+ if (mActiveTouchCount >= aInput.mTouches.Length()) {
+ // touch-end event contains only released touches
+ mActiveTouchCount -= aInput.mTouches.Length();
+ } else {
+ NS_WARNING("Got an unexpected touchend");
+ mActiveTouchCount = 0;
+ }
+ break;
+ case MultiTouchInput::MULTITOUCH_CANCEL:
+ mActiveTouchCount = 0;
+ break;
+ case MultiTouchInput::MULTITOUCH_MOVE:
+ break;
+ }
+}
+
+void TouchCounter::Update(const WidgetTouchEvent& aEvent) {
+ switch (aEvent.mMessage) {
+ case eTouchStart:
+ // touch-start event contains all active touches of the current session
+ mActiveTouchCount = aEvent.mTouches.Length();
+ break;
+ case eTouchEnd: {
+ // touch-end contains all touches, but ones being lifted are marked as
+ // changed
+ uint32_t liftedTouches = 0;
+ for (const auto& touch : aEvent.mTouches) {
+ if (touch->mChanged) {
+ liftedTouches++;
+ }
+ }
+ if (mActiveTouchCount >= liftedTouches) {
+ mActiveTouchCount -= liftedTouches;
+ } else {
+ NS_WARNING("Got an unexpected touchend");
+ mActiveTouchCount = 0;
+ }
+ break;
+ }
+ case eTouchCancel:
+ mActiveTouchCount = 0;
+ break;
+ default:
+ break;
+ }
+}
+
+uint32_t TouchCounter::GetActiveTouchCount() const { return mActiveTouchCount; }
+
+} // namespace layers
+} // namespace mozilla