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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /layout/xul/nsScrollbarFrame.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/xul/nsScrollbarFrame.h')
-rw-r--r-- | layout/xul/nsScrollbarFrame.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/layout/xul/nsScrollbarFrame.h b/layout/xul/nsScrollbarFrame.h new file mode 100644 index 0000000000..4b48295f02 --- /dev/null +++ b/layout/xul/nsScrollbarFrame.h @@ -0,0 +1,150 @@ +/* -*- 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/. */ + +// +// nsScrollbarFrame +// + +#ifndef nsScrollbarFrame_h__ +#define nsScrollbarFrame_h__ + +#include "mozilla/Attributes.h" +#include "mozilla/ScrollTypes.h" +#include "nsContainerFrame.h" +#include "nsIAnonymousContentCreator.h" + +class nsIScrollbarMediator; + +namespace mozilla { +class PresShell; +namespace dom { +class Element; +} +} // namespace mozilla + +nsIFrame* NS_NewScrollbarFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle); + +class nsScrollbarFrame final : public nsContainerFrame, + public nsIAnonymousContentCreator { + using Element = mozilla::dom::Element; + + public: + explicit nsScrollbarFrame(ComputedStyle* aStyle, nsPresContext* aPresContext) + : nsContainerFrame(aStyle, aPresContext, kClassID), + mSmoothScroll(false), + mScrollUnit(mozilla::ScrollUnit::DEVICE_PIXELS), + mDirection(0), + mIncrement(0), + mScrollbarMediator(nullptr), + mUpTopButton(nullptr), + mDownTopButton(nullptr), + mSlider(nullptr), + mThumb(nullptr), + mUpBottomButton(nullptr), + mDownBottomButton(nullptr) {} + + NS_DECL_QUERYFRAME + NS_DECL_FRAMEARENA_HELPERS(nsScrollbarFrame) + +#ifdef DEBUG_FRAME_DUMP + nsresult GetFrameName(nsAString& aResult) const override { + return MakeFrameName(u"ScrollbarFrame"_ns, aResult); + } +#endif + + // nsIFrame overrides + nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute, + int32_t aModType) override; + + NS_IMETHOD HandlePress(nsPresContext* aPresContext, + mozilla::WidgetGUIEvent* aEvent, + nsEventStatus* aEventStatus) override; + + NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext, + mozilla::WidgetGUIEvent* aEvent, + nsEventStatus* aEventStatus, + bool aControlHeld) override; + + MOZ_CAN_RUN_SCRIPT + NS_IMETHOD HandleDrag(nsPresContext* aPresContext, + mozilla::WidgetGUIEvent* aEvent, + nsEventStatus* aEventStatus) override; + + NS_IMETHOD HandleRelease(nsPresContext* aPresContext, + mozilla::WidgetGUIEvent* aEvent, + nsEventStatus* aEventStatus) override; + + mozilla::StyleScrollbarWidth ScrollbarWidth() const; + nscoord ScrollbarTrackSize() const; + nsSize ScrollbarMinSize() const; + bool IsHorizontal() const; + + void Destroy(DestroyContext&) override; + + void Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) override; + + void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize, + const ReflowInput& aReflowInput, + nsReflowStatus& aStatus) override; + + void SetScrollbarMediatorContent(nsIContent* aMediator); + nsIScrollbarMediator* GetScrollbarMediator(); + + /** + * The following three methods set the value of mIncrement when a + * scrollbar button is pressed. + */ + void SetIncrementToLine(int32_t aDirection); + void SetIncrementToPage(int32_t aDirection); + void SetIncrementToWhole(int32_t aDirection); + + /** + * If aImplementsScrollByUnit is Yes then this uses mSmoothScroll, + * mScrollUnit, and mDirection and calls ScrollByUnit on the + * nsIScrollbarMediator. The return value is 0. This is better because it is + * more modern and the scroll frame can perform the scroll via apz for + * example. The old way below is still supported for xul trees. If + * aImplementsScrollByUnit is No this adds mIncrement to the current + * position and updates the curpos attribute obeying mSmoothScroll. + * @returns The new position after clamping, in CSS Pixels + * @note This method might destroy the frame, pres shell, and other objects. + */ + enum class ImplementsScrollByUnit { Yes, No }; + int32_t MoveToNewPosition(ImplementsScrollByUnit aImplementsScrollByUnit); + int32_t GetIncrement() { return mIncrement; } + + // nsIAnonymousContentCreator + nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override; + void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements, + uint32_t aFilter) override; + + void UpdateChildrenAttributeValue(nsAtom* aAttribute, bool aNotify); + + protected: + bool mSmoothScroll; + mozilla::ScrollUnit mScrollUnit; + // Direction and multiple to scroll + int32_t mDirection; + + // Amount to scroll, in CSSPixels + // Ignored in favour of mScrollUnit/mDirection for regular scroll frames. + // Trees use this though. + int32_t mIncrement; + + private: + nsCOMPtr<nsIContent> mScrollbarMediator; + + nsCOMPtr<Element> mUpTopButton; + nsCOMPtr<Element> mDownTopButton; + nsCOMPtr<Element> mSlider; + nsCOMPtr<Element> mThumb; + nsCOMPtr<Element> mUpBottomButton; + nsCOMPtr<Element> mDownBottomButton; +}; // class nsScrollbarFrame + +#endif |