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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
This commit is contained in:
Roy Tam
commit
dcd9973243
150858 changed files with 23884658 additions and 0 deletions
651
layout/xul/tree/nsTreeBodyFrame.h
Normal file
651
layout/xul/tree/nsTreeBodyFrame.h
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsTreeBodyFrame_h
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#define nsTreeBodyFrame_h
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#include "mozilla/Attributes.h"
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#include "nsLeafBoxFrame.h"
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#include "nsITreeView.h"
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#include "nsICSSPseudoComparator.h"
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#include "nsIScrollbarMediator.h"
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#include "nsITimer.h"
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#include "nsIReflowCallback.h"
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#include "nsTArray.h"
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#include "nsTreeStyleCache.h"
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#include "nsTreeColumns.h"
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#include "nsDataHashtable.h"
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#include "imgIRequest.h"
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#include "imgINotificationObserver.h"
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#include "nsScrollbarFrame.h"
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#include "nsThreadUtils.h"
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#include "mozilla/LookAndFeel.h"
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class nsFontMetrics;
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class nsOverflowChecker;
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class nsTreeImageListener;
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namespace mozilla {
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namespace layout {
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class ScrollbarActivity;
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} // namespace layout
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} // namespace mozilla
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// An entry in the tree's image cache
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struct nsTreeImageCacheEntry
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{
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nsTreeImageCacheEntry() {}
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nsTreeImageCacheEntry(imgIRequest *aRequest, imgINotificationObserver *aListener)
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: request(aRequest), listener(aListener) {}
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nsCOMPtr<imgIRequest> request;
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nsCOMPtr<imgINotificationObserver> listener;
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};
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// The actual frame that paints the cells and rows.
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class nsTreeBodyFrame final
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: public nsLeafBoxFrame
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, public nsICSSPseudoComparator
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, public nsIScrollbarMediator
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, public nsIReflowCallback
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{
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typedef mozilla::layout::ScrollbarActivity ScrollbarActivity;
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typedef mozilla::image::DrawResult DrawResult;
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public:
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explicit nsTreeBodyFrame(nsStyleContext* aContext);
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~nsTreeBodyFrame();
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NS_DECL_QUERYFRAME_TARGET(nsTreeBodyFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// Callback handler methods for refresh driver based animations.
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// Calls to these functions are forwarded from nsTreeImageListener. These
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// mirror how nsImageFrame works.
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nsresult OnImageIsAnimated(imgIRequest* aRequest);
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// non-virtual signatures like nsITreeBodyFrame
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already_AddRefed<nsTreeColumns> Columns() const
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{
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RefPtr<nsTreeColumns> cols = mColumns;
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return cols.forget();
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}
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already_AddRefed<nsITreeView> GetExistingView() const
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{
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nsCOMPtr<nsITreeView> view = mView;
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return view.forget();
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}
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nsresult GetView(nsITreeView **aView);
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nsresult SetView(nsITreeView *aView);
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bool GetFocused() const { return mFocused; }
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nsresult SetFocused(bool aFocused);
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nsresult GetTreeBody(nsIDOMElement **aElement);
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int32_t RowHeight() const;
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int32_t RowWidth();
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int32_t GetHorizontalPosition() const;
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nsresult GetSelectionRegion(nsIScriptableRegion **aRegion);
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int32_t FirstVisibleRow() const { return mTopRowIndex; }
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int32_t LastVisibleRow() const { return mTopRowIndex + mPageLength; }
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int32_t PageLength() const { return mPageLength; }
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nsresult EnsureRowIsVisible(int32_t aRow);
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nsresult EnsureCellIsVisible(int32_t aRow, nsITreeColumn *aCol);
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nsresult ScrollToRow(int32_t aRow);
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nsresult ScrollByLines(int32_t aNumLines);
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nsresult ScrollByPages(int32_t aNumPages);
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nsresult ScrollToCell(int32_t aRow, nsITreeColumn *aCol);
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nsresult ScrollToColumn(nsITreeColumn *aCol);
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nsresult ScrollToHorizontalPosition(int32_t aValue);
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nsresult Invalidate();
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nsresult InvalidateColumn(nsITreeColumn *aCol);
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nsresult InvalidateRow(int32_t aRow);
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nsresult InvalidateCell(int32_t aRow, nsITreeColumn *aCol);
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nsresult InvalidateRange(int32_t aStart, int32_t aEnd);
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nsresult InvalidateColumnRange(int32_t aStart, int32_t aEnd,
|
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nsITreeColumn *aCol);
|
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nsresult GetRowAt(int32_t aX, int32_t aY, int32_t *aValue);
|
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nsresult GetCellAt(int32_t aX, int32_t aY, int32_t *aRow,
|
||||
nsITreeColumn **aCol, nsACString &aChildElt);
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nsresult GetCoordsForCellItem(int32_t aRow, nsITreeColumn *aCol,
|
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const nsACString &aElt,
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int32_t *aX, int32_t *aY,
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int32_t *aWidth, int32_t *aHeight);
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nsresult IsCellCropped(int32_t aRow, nsITreeColumn *aCol, bool *aResult);
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nsresult RowCountChanged(int32_t aIndex, int32_t aCount);
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nsresult BeginUpdateBatch();
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nsresult EndUpdateBatch();
|
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nsresult ClearStyleAndImageCaches();
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|
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void CancelImageRequests();
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|
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void ManageReflowCallback(const nsRect& aRect, nscoord aHorzWidth);
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|
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virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual void SetXULBounds(nsBoxLayoutState& aBoxLayoutState, const nsRect& aRect,
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bool aRemoveOverflowArea = false) override;
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|
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// nsIReflowCallback
|
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virtual bool ReflowFinished() override;
|
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virtual void ReflowCallbackCanceled() override;
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|
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// nsICSSPseudoComparator
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virtual bool PseudoMatches(nsCSSSelector* aSelector) override;
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|
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// nsIScrollbarMediator
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virtual void ScrollByPage(nsScrollbarFrame* aScrollbar, int32_t aDirection,
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nsIScrollbarMediator::ScrollSnapMode aSnap
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= nsIScrollbarMediator::DISABLE_SNAP) override;
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virtual void ScrollByWhole(nsScrollbarFrame* aScrollbar, int32_t aDirection,
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nsIScrollbarMediator::ScrollSnapMode aSnap
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= nsIScrollbarMediator::DISABLE_SNAP) override;
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virtual void ScrollByLine(nsScrollbarFrame* aScrollbar, int32_t aDirection,
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nsIScrollbarMediator::ScrollSnapMode aSnap
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= nsIScrollbarMediator::DISABLE_SNAP) override;
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virtual void RepeatButtonScroll(nsScrollbarFrame* aScrollbar) override;
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virtual void ThumbMoved(nsScrollbarFrame* aScrollbar,
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nscoord aOldPos,
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nscoord aNewPos) override;
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virtual void ScrollbarReleased(nsScrollbarFrame* aScrollbar) override {}
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virtual void VisibilityChanged(bool aVisible) override { Invalidate(); }
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virtual nsIFrame* GetScrollbarBox(bool aVertical) override {
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ScrollParts parts = GetScrollParts();
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return aVertical ? parts.mVScrollbar : parts.mHScrollbar;
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}
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virtual void ScrollbarActivityStarted() const override;
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virtual void ScrollbarActivityStopped() const override;
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virtual bool IsScrollbarOnRight() const override {
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return (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR);
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}
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virtual bool ShouldSuppressScrollbarRepaints() const override {
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return false;
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}
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// Overridden from nsIFrame to cache our pres context.
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual nsresult GetCursor(const nsPoint& aPoint,
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nsIFrame::Cursor& aCursor) override;
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virtual nsresult HandleEvent(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) override;
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
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friend nsIFrame* NS_NewTreeBodyFrame(nsIPresShell* aPresShell);
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friend class nsTreeColumn;
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struct ScrollParts {
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nsScrollbarFrame* mVScrollbar;
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nsCOMPtr<nsIContent> mVScrollbarContent;
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nsScrollbarFrame* mHScrollbar;
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nsCOMPtr<nsIContent> mHScrollbarContent;
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nsIFrame* mColumnsFrame;
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nsIScrollableFrame* mColumnsScrollFrame;
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};
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DrawResult PaintTreeBody(nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect, nsPoint aPt);
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nsITreeBoxObject* GetTreeBoxObject() const { return mTreeBoxObject; }
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// Get the base element, <tree> or <select>
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nsIContent* GetBaseElement();
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bool GetVerticalOverflow() const { return mVerticalOverflow; }
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bool GetHorizontalOverflow() const {return mHorizontalOverflow; }
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protected:
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friend class nsOverflowChecker;
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// This method paints a specific column background of the tree.
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DrawResult PaintColumn(nsTreeColumn* aColumn,
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const nsRect& aColumnRect,
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nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect);
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// This method paints a single row in the tree.
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DrawResult PaintRow(int32_t aRowIndex,
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const nsRect& aRowRect,
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nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
|
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nsPoint aPt);
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// This method paints a single separator in the tree.
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DrawResult PaintSeparator(int32_t aRowIndex,
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const nsRect& aSeparatorRect,
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nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
|
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const nsRect& aDirtyRect);
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// This method paints a specific cell in a given row of the tree.
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DrawResult PaintCell(int32_t aRowIndex,
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nsTreeColumn* aColumn,
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const nsRect& aCellRect,
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nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
|
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const nsRect& aDirtyRect,
|
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nscoord& aCurrX,
|
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nsPoint aPt);
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// This method paints the twisty inside a cell in the primary column of an tree.
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DrawResult PaintTwisty(int32_t aRowIndex,
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nsTreeColumn* aColumn,
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const nsRect& aTwistyRect,
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nsPresContext* aPresContext,
|
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nsRenderingContext& aRenderingContext,
|
||||
const nsRect& aDirtyRect,
|
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nscoord& aRemainingWidth,
|
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nscoord& aCurrX);
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|
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// This method paints the image inside the cell of an tree.
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DrawResult PaintImage(int32_t aRowIndex,
|
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nsTreeColumn* aColumn,
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const nsRect& aImageRect,
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nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
|
||||
const nsRect& aDirtyRect,
|
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nscoord& aRemainingWidth,
|
||||
nscoord& aCurrX);
|
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|
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// This method paints the text string inside a particular cell of the tree.
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DrawResult PaintText(int32_t aRowIndex,
|
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nsTreeColumn* aColumn,
|
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const nsRect& aTextRect,
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nsPresContext* aPresContext,
|
||||
nsRenderingContext& aRenderingContext,
|
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const nsRect& aDirtyRect,
|
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nscoord& aCurrX);
|
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|
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// This method paints the checkbox inside a particular cell of the tree.
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DrawResult PaintCheckbox(int32_t aRowIndex,
|
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nsTreeColumn* aColumn,
|
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const nsRect& aCheckboxRect,
|
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nsPresContext* aPresContext,
|
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nsRenderingContext& aRenderingContext,
|
||||
const nsRect& aDirtyRect);
|
||||
|
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// This method paints the progress meter inside a particular cell of the tree.
|
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DrawResult PaintProgressMeter(int32_t aRowIndex,
|
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nsTreeColumn* aColumn,
|
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const nsRect& aProgressMeterRect,
|
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nsPresContext* aPresContext,
|
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nsRenderingContext& aRenderingContext,
|
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const nsRect& aDirtyRect);
|
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|
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// This method paints a drop feedback of the tree.
|
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DrawResult PaintDropFeedback(const nsRect& aDropFeedbackRect,
|
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nsPresContext* aPresContext,
|
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nsRenderingContext& aRenderingContext,
|
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const nsRect& aDirtyRect,
|
||||
nsPoint aPt);
|
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|
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// This method is called with a specific style context and rect to
|
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// paint the background rect as if it were a full-blown frame.
|
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DrawResult PaintBackgroundLayer(nsStyleContext* aStyleContext,
|
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nsPresContext* aPresContext,
|
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nsRenderingContext& aRenderingContext,
|
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const nsRect& aRect,
|
||||
const nsRect& aDirtyRect);
|
||||
|
||||
|
||||
// An internal hit test. aX and aY are expected to be in twips in the
|
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// coordinate system of this frame.
|
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int32_t GetRowAt(nscoord aX, nscoord aY);
|
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|
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// Check for bidi characters in the text, and if there are any, ensure
|
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// that the prescontext is in bidi mode.
|
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void CheckTextForBidi(nsAutoString& aText);
|
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|
||||
void AdjustForCellText(nsAutoString& aText,
|
||||
int32_t aRowIndex,
|
||||
nsTreeColumn* aColumn,
|
||||
nsRenderingContext& aRenderingContext,
|
||||
nsFontMetrics& aFontMetrics,
|
||||
nsRect& aTextRect);
|
||||
|
||||
// A helper used when hit testing.
|
||||
nsIAtom* GetItemWithinCellAt(nscoord aX, const nsRect& aCellRect,
|
||||
int32_t aRowIndex, nsTreeColumn* aColumn);
|
||||
|
||||
// An internal hit test. aX and aY are expected to be in twips in the
|
||||
// coordinate system of this frame.
|
||||
void GetCellAt(nscoord aX, nscoord aY, int32_t* aRow, nsTreeColumn** aCol,
|
||||
nsIAtom** aChildElt);
|
||||
|
||||
// Retrieve the area for the twisty for a cell.
|
||||
nsITheme* GetTwistyRect(int32_t aRowIndex,
|
||||
nsTreeColumn* aColumn,
|
||||
nsRect& aImageRect,
|
||||
nsRect& aTwistyRect,
|
||||
nsPresContext* aPresContext,
|
||||
nsStyleContext* aTwistyContext);
|
||||
|
||||
// Fetch an image from the image cache.
|
||||
nsresult GetImage(int32_t aRowIndex, nsTreeColumn* aCol, bool aUseContext,
|
||||
nsStyleContext* aStyleContext, bool& aAllowImageRegions, imgIContainer** aResult);
|
||||
|
||||
// Returns the size of a given image. This size *includes* border and
|
||||
// padding. It does not include margins.
|
||||
nsRect GetImageSize(int32_t aRowIndex, nsTreeColumn* aCol, bool aUseContext, nsStyleContext* aStyleContext);
|
||||
|
||||
// Returns the destination size of the image, not including borders and padding.
|
||||
nsSize GetImageDestSize(nsStyleContext* aStyleContext, bool useImageRegion, imgIContainer* image);
|
||||
|
||||
// Returns the source rectangle of the image to be displayed.
|
||||
nsRect GetImageSourceRect(nsStyleContext* aStyleContext, bool useImageRegion, imgIContainer* image);
|
||||
|
||||
// Returns the height of rows in the tree.
|
||||
int32_t GetRowHeight();
|
||||
|
||||
// Returns our indentation width.
|
||||
int32_t GetIndentation();
|
||||
|
||||
// Calculates our width/height once border and padding have been removed.
|
||||
void CalcInnerBox();
|
||||
|
||||
// Calculate the total width of our scrollable portion
|
||||
nscoord CalcHorzWidth(const ScrollParts& aParts);
|
||||
|
||||
// Looks up a style context in the style cache. On a cache miss we resolve
|
||||
// the pseudo-styles passed in and place them into the cache.
|
||||
nsStyleContext* GetPseudoStyleContext(nsIAtom* aPseudoElement);
|
||||
|
||||
// Retrieves the scrollbars and scrollview relevant to this treebody. We
|
||||
// traverse the frame tree under our base element, in frame order, looking
|
||||
// for the first relevant vertical scrollbar, horizontal scrollbar, and
|
||||
// scrollable frame (with associated content and scrollable view). These
|
||||
// are all volatile and should not be retained.
|
||||
ScrollParts GetScrollParts();
|
||||
|
||||
// Update the curpos of the scrollbar.
|
||||
void UpdateScrollbars(const ScrollParts& aParts);
|
||||
|
||||
// Update the maxpos of the scrollbar.
|
||||
void InvalidateScrollbars(const ScrollParts& aParts, nsWeakFrame& aWeakColumnsFrame);
|
||||
|
||||
// Check overflow and generate events.
|
||||
void CheckOverflow(const ScrollParts& aParts);
|
||||
|
||||
// Calls UpdateScrollbars, Invalidate aNeedsFullInvalidation if true,
|
||||
// InvalidateScrollbars and finally CheckOverflow.
|
||||
// returns true if the frame is still alive after the method call.
|
||||
bool FullScrollbarsUpdate(bool aNeedsFullInvalidation);
|
||||
|
||||
// Use to auto-fill some of the common properties without the view having to do it.
|
||||
// Examples include container, open, selected, and focus.
|
||||
void PrefillPropertyArray(int32_t aRowIndex, nsTreeColumn* aCol);
|
||||
|
||||
// Our internal scroll method, used by all the public scroll methods.
|
||||
nsresult ScrollInternal(const ScrollParts& aParts, int32_t aRow);
|
||||
nsresult ScrollToRowInternal(const ScrollParts& aParts, int32_t aRow);
|
||||
nsresult ScrollToColumnInternal(const ScrollParts& aParts, nsITreeColumn* aCol);
|
||||
nsresult ScrollHorzInternal(const ScrollParts& aParts, int32_t aPosition);
|
||||
nsresult EnsureRowIsVisibleInternal(const ScrollParts& aParts, int32_t aRow);
|
||||
|
||||
// Convert client pixels into appunits in our coordinate space.
|
||||
nsPoint AdjustClientCoordsToBoxCoordSpace(int32_t aX, int32_t aY);
|
||||
|
||||
// Cache the box object
|
||||
void EnsureBoxObject();
|
||||
|
||||
void EnsureView();
|
||||
|
||||
nsresult GetCellWidth(int32_t aRow, nsTreeColumn* aCol,
|
||||
nsRenderingContext* aRenderingContext,
|
||||
nscoord& aDesiredSize, nscoord& aCurrentSize);
|
||||
nscoord CalcMaxRowWidth();
|
||||
|
||||
// Translate the given rect horizontally from tree coordinates into the
|
||||
// coordinate system of our nsTreeBodyFrame. If clip is true, then clip the
|
||||
// rect to its intersection with mInnerBox in the horizontal direction.
|
||||
// Return whether the result has a nonempty intersection with mInnerBox
|
||||
// after projecting both onto the horizontal coordinate axis.
|
||||
bool OffsetForHorzScroll(nsRect& rect, bool clip);
|
||||
|
||||
bool CanAutoScroll(int32_t aRowIndex);
|
||||
|
||||
// Calc the row and above/below/on status given where the mouse currently is hovering.
|
||||
// Also calc if we're in the region in which we want to auto-scroll the tree.
|
||||
// A positive value of |aScrollLines| means scroll down, a negative value
|
||||
// means scroll up, a zero value means that we aren't in drag scroll region.
|
||||
void ComputeDropPosition(mozilla::WidgetGUIEvent* aEvent,
|
||||
int32_t* aRow,
|
||||
int16_t* aOrient,
|
||||
int16_t* aScrollLines);
|
||||
|
||||
// Mark ourselves dirty if we're a select widget
|
||||
void MarkDirtyIfSelect();
|
||||
|
||||
void InvalidateDropFeedback(int32_t aRow, int16_t aOrientation) {
|
||||
InvalidateRow(aRow);
|
||||
if (aOrientation != nsITreeView::DROP_ON)
|
||||
InvalidateRow(aRow + aOrientation);
|
||||
}
|
||||
|
||||
public:
|
||||
static
|
||||
already_AddRefed<nsTreeColumn> GetColumnImpl(nsITreeColumn* aUnknownCol) {
|
||||
if (!aUnknownCol)
|
||||
return nullptr;
|
||||
|
||||
nsCOMPtr<nsTreeColumn> col = do_QueryInterface(aUnknownCol);
|
||||
return col.forget();
|
||||
}
|
||||
|
||||
/**
|
||||
* Remove an nsITreeImageListener from being tracked by this frame. Only tree
|
||||
* image listeners that are created by this frame are tracked.
|
||||
*
|
||||
* @param aListener A pointer to an nsTreeImageListener to no longer
|
||||
* track.
|
||||
*/
|
||||
void RemoveTreeImageListener(nsTreeImageListener* aListener);
|
||||
|
||||
protected:
|
||||
|
||||
// Create a new timer. This method is used to delay various actions like
|
||||
// opening/closing folders or tree scrolling.
|
||||
// aID is type of the action, aFunc is the function to be called when
|
||||
// the timer fires and aType is type of timer - one shot or repeating.
|
||||
nsresult CreateTimer(const mozilla::LookAndFeel::IntID aID,
|
||||
nsTimerCallbackFunc aFunc, int32_t aType,
|
||||
nsITimer** aTimer);
|
||||
|
||||
static void OpenCallback(nsITimer *aTimer, void *aClosure);
|
||||
|
||||
static void CloseCallback(nsITimer *aTimer, void *aClosure);
|
||||
|
||||
static void LazyScrollCallback(nsITimer *aTimer, void *aClosure);
|
||||
|
||||
static void ScrollCallback(nsITimer *aTimer, void *aClosure);
|
||||
|
||||
class ScrollEvent : public mozilla::Runnable {
|
||||
public:
|
||||
NS_DECL_NSIRUNNABLE
|
||||
explicit ScrollEvent(nsTreeBodyFrame *aInner) : mInner(aInner) {}
|
||||
void Revoke() { mInner = nullptr; }
|
||||
private:
|
||||
nsTreeBodyFrame* mInner;
|
||||
};
|
||||
|
||||
void PostScrollEvent();
|
||||
void FireScrollEvent();
|
||||
|
||||
/**
|
||||
* Clear the pointer to this frame for all nsTreeImageListeners that were
|
||||
* created by this frame.
|
||||
*/
|
||||
void DetachImageListeners();
|
||||
|
||||
#ifdef ACCESSIBILITY
|
||||
/**
|
||||
* Fires 'treeRowCountChanged' event asynchronously. The event supports
|
||||
* nsIDOMCustomEvent interface that is used to expose the following
|
||||
* information structures.
|
||||
*
|
||||
* @param aIndex the row index rows are added/removed from
|
||||
* @param aCount the number of added/removed rows (the sign points to
|
||||
* an operation, plus - addition, minus - removing)
|
||||
*/
|
||||
void FireRowCountChangedEvent(int32_t aIndex, int32_t aCount);
|
||||
|
||||
/**
|
||||
* Fires 'treeInvalidated' event asynchronously. The event supports
|
||||
* nsIDOMCustomEvent interface that is used to expose the information
|
||||
* structures described by method arguments.
|
||||
*
|
||||
* @param aStartRow the start index of invalidated rows, -1 means that
|
||||
* columns have been invalidated only
|
||||
* @param aEndRow the end index of invalidated rows, -1 means that columns
|
||||
* have been invalidated only
|
||||
* @param aStartCol the start invalidated column, nullptr means that only rows
|
||||
* have been invalidated
|
||||
* @param aEndCol the end invalidated column, nullptr means that rows have
|
||||
* been invalidated only
|
||||
*/
|
||||
void FireInvalidateEvent(int32_t aStartRow, int32_t aEndRow,
|
||||
nsITreeColumn *aStartCol, nsITreeColumn *aEndCol);
|
||||
#endif
|
||||
|
||||
protected: // Data Members
|
||||
|
||||
class Slots {
|
||||
public:
|
||||
Slots() {
|
||||
}
|
||||
|
||||
~Slots() {
|
||||
if (mTimer)
|
||||
mTimer->Cancel();
|
||||
}
|
||||
|
||||
friend class nsTreeBodyFrame;
|
||||
|
||||
protected:
|
||||
// If the drop is actually allowed here or not.
|
||||
bool mDropAllowed;
|
||||
|
||||
// True while dragging over the tree.
|
||||
bool mIsDragging;
|
||||
|
||||
// The row the mouse is hovering over during a drop.
|
||||
int32_t mDropRow;
|
||||
|
||||
// Where we want to draw feedback (above/on this row/below) if allowed.
|
||||
int16_t mDropOrient;
|
||||
|
||||
// Number of lines to be scrolled.
|
||||
int16_t mScrollLines;
|
||||
|
||||
// The drag action that was received for this slot
|
||||
uint32_t mDragAction;
|
||||
|
||||
// Timer for opening/closing spring loaded folders or scrolling the tree.
|
||||
nsCOMPtr<nsITimer> mTimer;
|
||||
|
||||
// An array used to keep track of all spring loaded folders.
|
||||
nsTArray<int32_t> mArray;
|
||||
};
|
||||
|
||||
Slots* mSlots;
|
||||
|
||||
nsRevocableEventPtr<ScrollEvent> mScrollEvent;
|
||||
|
||||
RefPtr<ScrollbarActivity> mScrollbarActivity;
|
||||
|
||||
// The cached box object parent.
|
||||
nsCOMPtr<nsITreeBoxObject> mTreeBoxObject;
|
||||
|
||||
// Cached column information.
|
||||
RefPtr<nsTreeColumns> mColumns;
|
||||
|
||||
// The current view for this tree widget. We get all of our row and cell data
|
||||
// from the view.
|
||||
nsCOMPtr<nsITreeView> mView;
|
||||
|
||||
// A cache of all the style contexts we have seen for rows and cells of the tree. This is a mapping from
|
||||
// a list of atoms to a corresponding style context. This cache stores every combination that
|
||||
// occurs in the tree, so for n distinct properties, this cache could have 2 to the n entries
|
||||
// (the power set of all row properties).
|
||||
nsTreeStyleCache mStyleCache;
|
||||
|
||||
// A hashtable that maps from URLs to image request/listener pairs. The URL
|
||||
// is provided by the view or by the style context. The style context
|
||||
// represents a resolved :-moz-tree-cell-image (or twisty) pseudo-element.
|
||||
// It maps directly to an imgIRequest.
|
||||
nsDataHashtable<nsStringHashKey, nsTreeImageCacheEntry> mImageCache;
|
||||
|
||||
// A scratch array used when looking up cached style contexts.
|
||||
AtomArray mScratchArray;
|
||||
|
||||
// The index of the first visible row and the # of rows visible onscreen.
|
||||
// The tree only examines onscreen rows, starting from
|
||||
// this index and going up to index+pageLength.
|
||||
int32_t mTopRowIndex;
|
||||
int32_t mPageLength;
|
||||
|
||||
// The horizontal scroll position
|
||||
nscoord mHorzPosition;
|
||||
|
||||
// The original desired horizontal width before changing it and posting a
|
||||
// reflow callback. In some cases, the desired horizontal width can first be
|
||||
// different from the current desired horizontal width, only to return to
|
||||
// the same value later during the same reflow. In this case, we can cancel
|
||||
// the posted reflow callback and prevent an unnecessary reflow.
|
||||
nscoord mOriginalHorzWidth;
|
||||
// Our desired horizontal width (the width for which we actually have tree
|
||||
// columns).
|
||||
nscoord mHorzWidth;
|
||||
// The amount by which to adjust the width of the last cell.
|
||||
// This depends on whether or not the columnpicker and scrollbars are present.
|
||||
nscoord mAdjustWidth;
|
||||
|
||||
// Cached heights and indent info.
|
||||
nsRect mInnerBox; // 4-byte aligned
|
||||
int32_t mRowHeight;
|
||||
int32_t mIndentation;
|
||||
nscoord mStringWidth;
|
||||
|
||||
int32_t mUpdateBatchNest;
|
||||
|
||||
// Cached row count.
|
||||
int32_t mRowCount;
|
||||
|
||||
// The row the mouse is hovering over.
|
||||
int32_t mMouseOverRow;
|
||||
|
||||
// Whether or not we're currently focused.
|
||||
bool mFocused;
|
||||
|
||||
// Do we have a fixed number of onscreen rows?
|
||||
bool mHasFixedRowCount;
|
||||
|
||||
bool mVerticalOverflow;
|
||||
bool mHorizontalOverflow;
|
||||
|
||||
bool mReflowCallbackPosted;
|
||||
|
||||
// Set while we flush layout to take account of effects of
|
||||
// overflow/underflow event handlers
|
||||
bool mCheckingOverflow;
|
||||
|
||||
// Hash table to keep track of which listeners we created and thus
|
||||
// have pointers to us.
|
||||
nsTHashtable<nsPtrHashKey<nsTreeImageListener> > mCreatedListeners;
|
||||
|
||||
}; // class nsTreeBodyFrame
|
||||
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue