1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/nsListBoxBodyFrame.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,194 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsListBoxBodyFrame_h
1.10 +#define nsListBoxBodyFrame_h
1.11 +
1.12 +#include "mozilla/Attributes.h"
1.13 +#include "nsCOMPtr.h"
1.14 +#include "nsBoxFrame.h"
1.15 +#include "nsIListBoxObject.h"
1.16 +#include "nsIScrollbarMediator.h"
1.17 +#include "nsIReflowCallback.h"
1.18 +#include "nsBoxLayoutState.h"
1.19 +#include "nsThreadUtils.h"
1.20 +#include "nsPIBoxObject.h"
1.21 +
1.22 +class nsPresContext;
1.23 +class nsListScrollSmoother;
1.24 +nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell,
1.25 + nsStyleContext* aContext);
1.26 +
1.27 +class nsListBoxBodyFrame : public nsBoxFrame,
1.28 + public nsIScrollbarMediator,
1.29 + public nsIReflowCallback
1.30 +{
1.31 + nsListBoxBodyFrame(nsIPresShell* aPresShell, nsStyleContext* aContext,
1.32 + nsBoxLayout* aLayoutManager);
1.33 + virtual ~nsListBoxBodyFrame();
1.34 +
1.35 +public:
1.36 + NS_DECL_QUERYFRAME_TARGET(nsListBoxBodyFrame)
1.37 + NS_DECL_QUERYFRAME
1.38 + NS_DECL_FRAMEARENA_HELPERS
1.39 +
1.40 + // non-virtual nsIListBoxObject
1.41 + nsresult GetRowCount(int32_t *aResult);
1.42 + nsresult GetNumberOfVisibleRows(int32_t *aResult);
1.43 + nsresult GetIndexOfFirstVisibleRow(int32_t *aResult);
1.44 + nsresult EnsureIndexIsVisible(int32_t aRowIndex);
1.45 + nsresult ScrollToIndex(int32_t aRowIndex);
1.46 + nsresult ScrollByLines(int32_t aNumLines);
1.47 + nsresult GetItemAtIndex(int32_t aIndex, nsIDOMElement **aResult);
1.48 + nsresult GetIndexOfItem(nsIDOMElement *aItem, int32_t *aResult);
1.49 +
1.50 + friend nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell,
1.51 + nsStyleContext* aContext);
1.52 +
1.53 + // nsIFrame
1.54 + virtual void Init(nsIContent* aContent,
1.55 + nsIFrame* aParent,
1.56 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.57 + virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
1.58 +
1.59 + virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) MOZ_OVERRIDE;
1.60 +
1.61 + // nsIScrollbarMediator
1.62 + NS_IMETHOD PositionChanged(nsScrollbarFrame* aScrollbar, int32_t aOldIndex, int32_t& aNewIndex) MOZ_OVERRIDE;
1.63 + NS_IMETHOD ScrollbarButtonPressed(nsScrollbarFrame* aScrollbar, int32_t aOldIndex, int32_t aNewIndex) MOZ_OVERRIDE;
1.64 + NS_IMETHOD VisibilityChanged(bool aVisible) MOZ_OVERRIDE;
1.65 +
1.66 + // nsIReflowCallback
1.67 + virtual bool ReflowFinished() MOZ_OVERRIDE;
1.68 + virtual void ReflowCallbackCanceled() MOZ_OVERRIDE;
1.69 +
1.70 + NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
1.71 + virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE;
1.72 +
1.73 + virtual nsSize GetMinSizeForScrollArea(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
1.74 + virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
1.75 +
1.76 + // size calculation
1.77 + int32_t GetRowCount();
1.78 + int32_t GetRowHeightAppUnits() { return mRowHeight; }
1.79 + int32_t GetFixedRowSize();
1.80 + void SetRowHeight(nscoord aRowHeight);
1.81 + nscoord GetYPosition();
1.82 + nscoord GetAvailableHeight();
1.83 + nscoord ComputeIntrinsicWidth(nsBoxLayoutState& aBoxLayoutState);
1.84 +
1.85 + // scrolling
1.86 + nsresult InternalPositionChangedCallback();
1.87 + nsresult InternalPositionChanged(bool aUp, int32_t aDelta);
1.88 + // Process pending position changed events, then do the position change.
1.89 + // This can wipe out the frametree.
1.90 + nsresult DoInternalPositionChangedSync(bool aUp, int32_t aDelta);
1.91 + // Actually do the internal position change. This can wipe out the frametree
1.92 + nsresult DoInternalPositionChanged(bool aUp, int32_t aDelta);
1.93 + nsListScrollSmoother* GetSmoother();
1.94 + void VerticalScroll(int32_t aDelta);
1.95 +
1.96 + // frames
1.97 + nsIFrame* GetFirstFrame();
1.98 + nsIFrame* GetLastFrame();
1.99 +
1.100 + // lazy row creation and destruction
1.101 + void CreateRows();
1.102 + void DestroyRows(int32_t& aRowsToLose);
1.103 + void ReverseDestroyRows(int32_t& aRowsToLose);
1.104 + nsIFrame* GetFirstItemBox(int32_t aOffset, bool* aCreated);
1.105 + nsIFrame* GetNextItemBox(nsIFrame* aBox, int32_t aOffset, bool* aCreated);
1.106 + bool ContinueReflow(nscoord height);
1.107 + NS_IMETHOD ListBoxAppendFrames(nsFrameList& aFrameList);
1.108 + NS_IMETHOD ListBoxInsertFrames(nsIFrame* aPrevFrame, nsFrameList& aFrameList);
1.109 + void OnContentInserted(nsPresContext* aPresContext, nsIContent* aContent);
1.110 + void OnContentRemoved(nsPresContext* aPresContext, nsIContent* aContainer,
1.111 + nsIFrame* aChildFrame, nsIContent* aOldNextSibling);
1.112 +
1.113 + void GetListItemContentAt(int32_t aIndex, nsIContent** aContent);
1.114 + void GetListItemNextSibling(nsIContent* aListItem, nsIContent** aContent, int32_t& aSiblingIndex);
1.115 +
1.116 + void PostReflowCallback();
1.117 +
1.118 + bool SetBoxObject(nsPIBoxObject* aBoxObject)
1.119 + {
1.120 + NS_ENSURE_TRUE(!mBoxObject, false);
1.121 + mBoxObject = aBoxObject;
1.122 + return true;
1.123 + }
1.124 +
1.125 + virtual bool SupportsOrdinalsInChildren() MOZ_OVERRIDE;
1.126 +
1.127 + virtual bool ComputesOwnOverflowArea() MOZ_OVERRIDE { return true; }
1.128 +
1.129 +protected:
1.130 + class nsPositionChangedEvent;
1.131 + friend class nsPositionChangedEvent;
1.132 +
1.133 + class nsPositionChangedEvent : public nsRunnable
1.134 + {
1.135 + public:
1.136 + nsPositionChangedEvent(nsListBoxBodyFrame* aFrame,
1.137 + bool aUp, int32_t aDelta) :
1.138 + mFrame(aFrame), mUp(aUp), mDelta(aDelta)
1.139 + {}
1.140 +
1.141 + NS_IMETHOD Run() MOZ_OVERRIDE
1.142 + {
1.143 + if (!mFrame) {
1.144 + return NS_OK;
1.145 + }
1.146 +
1.147 + mFrame->mPendingPositionChangeEvents.RemoveElement(this);
1.148 +
1.149 + return mFrame->DoInternalPositionChanged(mUp, mDelta);
1.150 + }
1.151 +
1.152 + void Revoke() {
1.153 + mFrame = nullptr;
1.154 + }
1.155 +
1.156 + nsListBoxBodyFrame* mFrame;
1.157 + bool mUp;
1.158 + int32_t mDelta;
1.159 + };
1.160 +
1.161 + void ComputeTotalRowCount();
1.162 + void RemoveChildFrame(nsBoxLayoutState &aState, nsIFrame *aChild);
1.163 +
1.164 + nsTArray< nsRefPtr<nsPositionChangedEvent> > mPendingPositionChangeEvents;
1.165 + nsCOMPtr<nsPIBoxObject> mBoxObject;
1.166 +
1.167 + // frame markers
1.168 + nsWeakFrame mTopFrame;
1.169 + nsIFrame* mBottomFrame;
1.170 + nsIFrame* mLinkupFrame;
1.171 +
1.172 + nsListScrollSmoother* mScrollSmoother;
1.173 +
1.174 + int32_t mRowsToPrepend;
1.175 +
1.176 + // row height
1.177 + int32_t mRowCount;
1.178 + nscoord mRowHeight;
1.179 + nscoord mAvailableHeight;
1.180 + nscoord mStringWidth;
1.181 +
1.182 + // scrolling
1.183 + int32_t mCurrentIndex; // Row-based
1.184 + int32_t mOldIndex;
1.185 + int32_t mYPosition;
1.186 + int32_t mTimePerRow;
1.187 +
1.188 + // row height
1.189 + bool mRowHeightWasSet;
1.190 + // scrolling
1.191 + bool mScrolling;
1.192 + bool mAdjustScroll;
1.193 +
1.194 + bool mReflowCallbackPosted;
1.195 +};
1.196 +
1.197 +#endif // nsListBoxBodyFrame_h
