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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/layers/apz/src/DragTracker.cpp
parentInitial commit. (diff)
downloadfirefox-upstream/124.0.1.tar.xz
firefox-upstream/124.0.1.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/layers/apz/src/DragTracker.cpp')
-rw-r--r--gfx/layers/apz/src/DragTracker.cpp59
1 files changed, 59 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/DragTracker.cpp b/gfx/layers/apz/src/DragTracker.cpp
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+++ b/gfx/layers/apz/src/DragTracker.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 "DragTracker.h"
+
+#include "InputData.h"
+#include "mozilla/Logging.h"
+
+static mozilla::LazyLogModule sApzDrgLog("apz.drag");
+#define DRAG_LOG(...) MOZ_LOG(sApzDrgLog, LogLevel::Debug, (__VA_ARGS__))
+
+namespace mozilla {
+namespace layers {
+
+DragTracker::DragTracker() : mInDrag(false) {}
+
+/*static*/
+bool DragTracker::StartsDrag(const MouseInput& aInput) {
+ return aInput.IsLeftButton() && aInput.mType == MouseInput::MOUSE_DOWN;
+}
+
+/*static*/
+bool DragTracker::EndsDrag(const MouseInput& aInput) {
+ // On Windows, we don't receive a MOUSE_UP at the end of a drag if an
+ // actual drag session took place. As a backup, we detect the end of the
+ // drag using the MOUSE_DRAG_END event, which normally is routed directly
+ // to content, but we're specially routing to APZ for this purpose. Bug
+ // 1265105 tracks a solution to this at the Windows widget layer; once
+ // that is implemented, this workaround can be removed.
+ return (aInput.IsLeftButton() && aInput.mType == MouseInput::MOUSE_UP) ||
+ aInput.mType == MouseInput::MOUSE_DRAG_END;
+}
+
+void DragTracker::Update(const MouseInput& aInput) {
+ if (StartsDrag(aInput)) {
+ DRAG_LOG("Starting drag\n");
+ mInDrag = true;
+ } else if (EndsDrag(aInput)) {
+ DRAG_LOG("Ending drag\n");
+ mInDrag = false;
+ mOnScrollbar = Nothing();
+ }
+}
+
+bool DragTracker::InDrag() const { return mInDrag; }
+
+bool DragTracker::IsOnScrollbar(bool aOnScrollbar) {
+ if (!mOnScrollbar) {
+ DRAG_LOG("Setting hitscrollbar %d\n", aOnScrollbar);
+ mOnScrollbar = Some(aOnScrollbar);
+ }
+ return mOnScrollbar.value();
+}
+
+} // namespace layers
+} // namespace mozilla