Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 225 insertions, 0 deletions

diff --git a/layout/xul/nsSliderFrame.h b/layout/xul/nsSliderFrame.h
new file mode 100644
index 0000000000..3f2dbe531e
--- /dev/null
+++ b/layout/xul/nsSliderFrame.h
@@ -0,0 +1,225 @@
+/* -*- 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/. */
+
+#ifndef nsSliderFrame_h__
+#define nsSliderFrame_h__
+
+#include "mozilla/Attributes.h"
+#include "nsRepeatService.h"
+#include "nsBoxFrame.h"
+#include "nsAtom.h"
+#include "nsCOMPtr.h"
+#include "nsITimer.h"
+#include "nsIDOMEventListener.h"
+
+class nsITimer;
+class nsSliderFrame;
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+nsIFrame* NS_NewSliderFrame(mozilla::PresShell* aPresShell,
+                            mozilla::ComputedStyle* aStyle);
+
+class nsSliderMediator final : public nsIDOMEventListener {
+ public:
+  NS_DECL_ISUPPORTS
+
+  nsSliderFrame* mSlider;
+
+  explicit nsSliderMediator(nsSliderFrame* aSlider) { mSlider = aSlider; }
+
+  virtual void SetSlider(nsSliderFrame* aSlider) { mSlider = aSlider; }
+
+  NS_DECL_NSIDOMEVENTLISTENER
+
+ protected:
+  virtual ~nsSliderMediator() = default;
+};
+
+class nsSliderFrame final : public nsBoxFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(nsSliderFrame)
+  NS_DECL_QUERYFRAME
+
+  friend class nsSliderMediator;
+
+  explicit nsSliderFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
+  virtual ~nsSliderFrame();
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override {
+    return MakeFrameName(u"SliderFrame"_ns, aResult);
+  }
+#endif
+
+  virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
+  virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
+  virtual nsSize GetXULMaxSize(nsBoxLayoutState& aBoxLayoutState) override;
+  NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override;
+
+  // nsIFrame overrides
+  virtual void DestroyFrom(nsIFrame* aDestructRoot,
+                           PostDestroyData& aPostDestroyData) override;
+
+  virtual void BuildDisplayListForChildren(
+      nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) override;
+
+  virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                const nsDisplayListSet& aLists) override;
+
+  virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+                                    int32_t aModType) override;
+
+  virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
+                    nsIFrame* asPrevInFlow) override;
+
+  virtual nsresult HandleEvent(nsPresContext* aPresContext,
+                               mozilla::WidgetGUIEvent* aEvent,
+                               nsEventStatus* aEventStatus) override;
+
+  // nsContainerFrame overrides
+  virtual void SetInitialChildList(ChildListID aListID,
+                                   nsFrameList& aChildList) override;
+  virtual void AppendFrames(ChildListID aListID,
+                            nsFrameList& aFrameList) override;
+  virtual void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
+                            const nsLineList::iterator* aPrevFrameLine,
+                            nsFrameList& aFrameList) override;
+  virtual void RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) override;
+
+  nsresult StartDrag(mozilla::dom::Event* aEvent);
+  nsresult StopDrag();
+
+  void StartAPZDrag(mozilla::WidgetGUIEvent* aEvent);
+
+  static int32_t GetCurrentPosition(nsIContent* content);
+  static int32_t GetMinPosition(nsIContent* content);
+  static int32_t GetMaxPosition(nsIContent* content);
+  static int32_t GetIncrement(nsIContent* content);
+  static int32_t GetPageIncrement(nsIContent* content);
+  static int32_t GetIntegerAttribute(nsIContent* content, nsAtom* atom,
+                                     int32_t defaultValue);
+  void EnsureOrient();
+
+  NS_IMETHOD HandlePress(nsPresContext* aPresContext,
+                         mozilla::WidgetGUIEvent* aEvent,
+                         nsEventStatus* aEventStatus) override;
+
+  NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
+                                 mozilla::WidgetGUIEvent* aEvent,
+                                 nsEventStatus* aEventStatus,
+                                 bool aControlHeld) override {
+    return NS_OK;
+  }
+
+  MOZ_CAN_RUN_SCRIPT
+  NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
+                        mozilla::WidgetGUIEvent* aEvent,
+                        nsEventStatus* aEventStatus) override {
+    return NS_OK;
+  }
+
+  NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
+                           mozilla::WidgetGUIEvent* aEvent,
+                           nsEventStatus* aEventStatus) override;
+
+  // Return the ratio the scrollbar thumb should move in proportion to the
+  // scrolled frame.
+  float GetThumbRatio() const;
+
+  // Notify the slider frame that an async scrollbar drag was started on the
+  // APZ side without consulting the main thread. The block id is the APZ
+  // input block id of the mousedown that started the drag.
+  void AsyncScrollbarDragInitiated(uint64_t aDragBlockId);
+
+  // Notify the slider frame that an async scrollbar drag requested in
+  // StartAPZDrag() was rejected by APZ, and the slider frame should
+  // fall back to main-thread dragging.
+  void AsyncScrollbarDragRejected();
+
+  bool OnlySystemGroupDispatch(mozilla::EventMessage aMessage) const override;
+
+  // Returns the associated scrollframe that contains this slider if any.
+  nsIScrollableFrame* GetScrollFrame();
+
+ private:
+  bool GetScrollToClick();
+  nsIFrame* GetScrollbar();
+  bool ShouldScrollForEvent(mozilla::WidgetGUIEvent* aEvent);
+  bool ShouldScrollToClickForEvent(mozilla::WidgetGUIEvent* aEvent);
+  bool IsEventOverThumb(mozilla::WidgetGUIEvent* aEvent);
+
+  void PageUpDown(nscoord change);
+  void SetCurrentThumbPosition(nsIContent* aScrollbar, nscoord aNewPos,
+                               bool aIsSmooth, bool aMaySnap);
+  void SetCurrentPosition(nsIContent* aScrollbar, int32_t aNewPos,
+                          bool aIsSmooth);
+  void SetCurrentPositionInternal(nsIContent* aScrollbar, int32_t pos,
+                                  bool aIsSmooth);
+  void CurrentPositionChanged();
+
+  void DragThumb(bool aGrabMouseEvents);
+  void AddListener();
+  void RemoveListener();
+  bool isDraggingThumb() const;
+
+  void SuppressDisplayport();
+  void UnsuppressDisplayport();
+
+  void StartRepeat() {
+    nsRepeatService::GetInstance()->Start(Notify, this, mContent->OwnerDoc(),
+                                          "nsSliderFrame"_ns);
+  }
+  void StopRepeat() { nsRepeatService::GetInstance()->Stop(Notify, this); }
+  void Notify();
+  static void Notify(void* aData) {
+    (static_cast<nsSliderFrame*>(aData))->Notify();
+  }
+  void PageScroll(nscoord aChange);
+
+  nsPoint mDestinationPoint;
+  RefPtr<nsSliderMediator> mMediator;
+
+  float mRatio;
+
+  nscoord mDragStart;
+  nscoord mThumbStart;
+
+  int32_t mCurPos;
+
+  nscoord mChange;
+
+  bool mDragFinished;
+
+  // true if an attribute change has been caused by the user manipulating the
+  // slider. This allows notifications to tell how a slider's current position
+  // was changed.
+  bool mUserChanged;
+
+  // true if we've handed off the scrolling to APZ. This means that we should
+  // ignore scrolling events as the position will be updated by APZ. If we were
+  // to process these events then the scroll position update would conflict
+  // causing the scroll position to jump.
+  bool mScrollingWithAPZ;
+
+  // true if displayport suppression is active, for more performant
+  // scrollbar-dragging behaviour.
+  bool mSuppressionActive;
+
+  // If APZ initiated a scrollbar drag without main-thread involvement, it
+  // notifies us and this variable stores the input block id of the APZ input
+  // block that started the drag. This lets us handle the corresponding
+  // mousedown event properly, if it arrives after the scroll position has
+  // been shifted due to async scrollbar drag.
+  Maybe<uint64_t> mAPZDragInitiated;
+
+  static bool gMiddlePref;
+  static int32_t gSnapMultiplier;
+};  // class nsSliderFrame
+
+#endif