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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /layout/xul/nsIScrollbarMediator.h | |
parent | Initial commit. (diff) | |
download | firefox-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 'layout/xul/nsIScrollbarMediator.h')
-rw-r--r-- | layout/xul/nsIScrollbarMediator.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/layout/xul/nsIScrollbarMediator.h b/layout/xul/nsIScrollbarMediator.h new file mode 100644 index 0000000000..ce26289fd9 --- /dev/null +++ b/layout/xul/nsIScrollbarMediator.h @@ -0,0 +1,101 @@ +/* -*- 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 nsIScrollbarMediator_h___ +#define nsIScrollbarMediator_h___ + +#include "mozilla/ScrollTypes.h" +#include "nsQueryFrame.h" +#include "nsCoord.h" + +class nsScrollbarFrame; +class nsIFrame; + +class nsIScrollbarMediator : public nsQueryFrame { + public: + NS_DECL_QUERYFRAME_TARGET(nsIScrollbarMediator) + + /** + * The aScrollbar argument denotes the scrollbar that's firing the + * notification. aScrollbar is never null. aDirection is either -1, 0, or 1. + */ + + /** + * When set to ENABLE_SNAP, additional scrolling will be performed after the + * scroll operation to maintain the constraints set by CSS Scroll snapping. + * The additional scrolling may include asynchronous smooth scrolls that + * continue to animate after the initial scroll position has been set. + * In case of DEFAULT, it means ENABLE_SNAP for CSS scroll snap v1, + * DISABLE_SNAP for the old scroll snap. + */ + + /** + * One of the following three methods is called when the scrollbar's button is + * clicked. + * @note These methods might destroy the frame, pres shell, and other objects. + */ + virtual void ScrollByPage(nsScrollbarFrame* aScrollbar, int32_t aDirection, + mozilla::ScrollSnapFlags aSnapFlags = + mozilla::ScrollSnapFlags::Disabled) = 0; + virtual void ScrollByWhole(nsScrollbarFrame* aScrollbar, int32_t aDirection, + mozilla::ScrollSnapFlags aSnapFlags = + mozilla::ScrollSnapFlags::Disabled) = 0; + virtual void ScrollByLine(nsScrollbarFrame* aScrollbar, int32_t aDirection, + mozilla::ScrollSnapFlags aSnapFlags = + mozilla::ScrollSnapFlags::Disabled) = 0; + + // Only implemented for nsGfxScrollFrame, not nsTreeBodyFrame. + virtual void ScrollByUnit(nsScrollbarFrame* aScrollbar, + mozilla::ScrollMode aMode, int32_t aDirection, + mozilla::ScrollUnit aUnit, + mozilla::ScrollSnapFlags aSnapFlags = + mozilla::ScrollSnapFlags::Disabled) = 0; + + /** + * RepeatButtonScroll is called when the scrollbar's button is held down. When + * the button is first clicked the increment is set; RepeatButtonScroll adds + * this increment to the current position. + * @note This method might destroy the frame, pres shell, and other objects. + */ + virtual void RepeatButtonScroll(nsScrollbarFrame* aScrollbar) = 0; + /** + * aOldPos and aNewPos are scroll positions. + * The scroll positions start with zero at the left edge; implementors that + * want zero at the right edge for RTL content will need to adjust + * accordingly. (See nsHTMLScrollFrame::ThumbMoved in nsGfxScrollFrame.cpp.) + * @note This method might destroy the frame, pres shell, and other objects. + */ + virtual void ThumbMoved(nsScrollbarFrame* aScrollbar, nscoord aOldPos, + nscoord aNewPos) = 0; + /** + * Called when the scroll bar thumb, slider, or any other component is + * released. + */ + virtual void ScrollbarReleased(nsScrollbarFrame* aScrollbar) = 0; + virtual void VisibilityChanged(bool aVisible) = 0; + + /** + * Obtain the frame for the horizontal or vertical scrollbar, or null + * if there is no such box. + */ + virtual nsScrollbarFrame* GetScrollbarBox(bool aVertical) = 0; + /** + * Show or hide scrollbars on 2 fingers touch. + * Subclasses should call their ScrollbarActivity's corresponding methods. + */ + virtual void ScrollbarActivityStarted() const = 0; + virtual void ScrollbarActivityStopped() const = 0; + + virtual bool IsScrollbarOnRight() const = 0; + + /** + * Returns true if the mediator is asking the scrollbar to suppress + * repainting itself on changes. + */ + virtual bool ShouldSuppressScrollbarRepaints() const = 0; +}; + +#endif |