The Tor Browser / file comparison
comparison: layout/xul/nsListBoxBodyFrame.h
layout/xul/nsListBoxBodyFrame.h
- branch
- TOR_BUG_9701
- changeset 12
- 7540298fafa1
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| -1:000000000000 | 0:bf07203e5f7b |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef nsListBoxBodyFrame_h | |
| 7 #define nsListBoxBodyFrame_h | |
| 8 | |
| 9 #include "mozilla/Attributes.h" | |
| 10 #include "nsCOMPtr.h" | |
| 11 #include "nsBoxFrame.h" | |
| 12 #include "nsIListBoxObject.h" | |
| 13 #include "nsIScrollbarMediator.h" | |
| 14 #include "nsIReflowCallback.h" | |
| 15 #include "nsBoxLayoutState.h" | |
| 16 #include "nsThreadUtils.h" | |
| 17 #include "nsPIBoxObject.h" | |
| 18 | |
| 19 class nsPresContext; | |
| 20 class nsListScrollSmoother; | |
| 21 nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell, | |
| 22 nsStyleContext* aContext); | |
| 23 | |
| 24 class nsListBoxBodyFrame : public nsBoxFrame, | |
| 25 public nsIScrollbarMediator, | |
| 26 public nsIReflowCallback | |
| 27 { | |
| 28 nsListBoxBodyFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, | |
| 29 nsBoxLayout* aLayoutManager); | |
| 30 virtual ~nsListBoxBodyFrame(); | |
| 31 | |
| 32 public: | |
| 33 NS_DECL_QUERYFRAME_TARGET(nsListBoxBodyFrame) | |
| 34 NS_DECL_QUERYFRAME | |
| 35 NS_DECL_FRAMEARENA_HELPERS | |
| 36 | |
| 37 // non-virtual nsIListBoxObject | |
| 38 nsresult GetRowCount(int32_t *aResult); | |
| 39 nsresult GetNumberOfVisibleRows(int32_t *aResult); | |
| 40 nsresult GetIndexOfFirstVisibleRow(int32_t *aResult); | |
| 41 nsresult EnsureIndexIsVisible(int32_t aRowIndex); | |
| 42 nsresult ScrollToIndex(int32_t aRowIndex); | |
| 43 nsresult ScrollByLines(int32_t aNumLines); | |
| 44 nsresult GetItemAtIndex(int32_t aIndex, nsIDOMElement **aResult); | |
| 45 nsresult GetIndexOfItem(nsIDOMElement *aItem, int32_t *aResult); | |
| 46 | |
| 47 friend nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell, | |
| 48 nsStyleContext* aContext); | |
| 49 | |
| 50 // nsIFrame | |
| 51 virtual void Init(nsIContent* aContent, | |
| 52 nsIFrame* aParent, | |
| 53 nsIFrame* aPrevInFlow) MOZ_OVERRIDE; | |
| 54 virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE; | |
| 55 | |
| 56 virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) MOZ_OVERRIDE; | |
| 57 | |
| 58 // nsIScrollbarMediator | |
| 59 NS_IMETHOD PositionChanged(nsScrollbarFrame* aScrollbar, int32_t aOldIndex, int32_t& aNewIndex) MOZ_OVERRIDE; | |
| 60 NS_IMETHOD ScrollbarButtonPressed(nsScrollbarFrame* aScrollbar, int32_t aOldIndex, int32_t aNewIndex) MOZ_OVERRIDE; | |
| 61 NS_IMETHOD VisibilityChanged(bool aVisible) MOZ_OVERRIDE; | |
| 62 | |
| 63 // nsIReflowCallback | |
| 64 virtual bool ReflowFinished() MOZ_OVERRIDE; | |
| 65 virtual void ReflowCallbackCanceled() MOZ_OVERRIDE; | |
| 66 | |
| 67 NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE; | |
| 68 virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE; | |
| 69 | |
| 70 virtual nsSize GetMinSizeForScrollArea(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE; | |
| 71 virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE; | |
| 72 | |
| 73 // size calculation | |
| 74 int32_t GetRowCount(); | |
| 75 int32_t GetRowHeightAppUnits() { return mRowHeight; } | |
| 76 int32_t GetFixedRowSize(); | |
| 77 void SetRowHeight(nscoord aRowHeight); | |
| 78 nscoord GetYPosition(); | |
| 79 nscoord GetAvailableHeight(); | |
| 80 nscoord ComputeIntrinsicWidth(nsBoxLayoutState& aBoxLayoutState); | |
| 81 | |
| 82 // scrolling | |
| 83 nsresult InternalPositionChangedCallback(); | |
| 84 nsresult InternalPositionChanged(bool aUp, int32_t aDelta); | |
| 85 // Process pending position changed events, then do the position change. | |
| 86 // This can wipe out the frametree. | |
| 87 nsresult DoInternalPositionChangedSync(bool aUp, int32_t aDelta); | |
| 88 // Actually do the internal position change. This can wipe out the frametree | |
| 89 nsresult DoInternalPositionChanged(bool aUp, int32_t aDelta); | |
| 90 nsListScrollSmoother* GetSmoother(); | |
| 91 void VerticalScroll(int32_t aDelta); | |
| 92 | |
| 93 // frames | |
| 94 nsIFrame* GetFirstFrame(); | |
| 95 nsIFrame* GetLastFrame(); | |
| 96 | |
| 97 // lazy row creation and destruction | |
| 98 void CreateRows(); | |
| 99 void DestroyRows(int32_t& aRowsToLose); | |
| 100 void ReverseDestroyRows(int32_t& aRowsToLose); | |
| 101 nsIFrame* GetFirstItemBox(int32_t aOffset, bool* aCreated); | |
| 102 nsIFrame* GetNextItemBox(nsIFrame* aBox, int32_t aOffset, bool* aCreated); | |
| 103 bool ContinueReflow(nscoord height); | |
| 104 NS_IMETHOD ListBoxAppendFrames(nsFrameList& aFrameList); | |
| 105 NS_IMETHOD ListBoxInsertFrames(nsIFrame* aPrevFrame, nsFrameList& aFrameList); | |
| 106 void OnContentInserted(nsPresContext* aPresContext, nsIContent* aContent); | |
| 107 void OnContentRemoved(nsPresContext* aPresContext, nsIContent* aContainer, | |
| 108 nsIFrame* aChildFrame, nsIContent* aOldNextSibling); | |
| 109 | |
| 110 void GetListItemContentAt(int32_t aIndex, nsIContent** aContent); | |
| 111 void GetListItemNextSibling(nsIContent* aListItem, nsIContent** aContent, int32_t& aSiblingIndex); | |
| 112 | |
| 113 void PostReflowCallback(); | |
| 114 | |
| 115 bool SetBoxObject(nsPIBoxObject* aBoxObject) | |
| 116 { | |
| 117 NS_ENSURE_TRUE(!mBoxObject, false); | |
| 118 mBoxObject = aBoxObject; | |
| 119 return true; | |
| 120 } | |
| 121 | |
| 122 virtual bool SupportsOrdinalsInChildren() MOZ_OVERRIDE; | |
| 123 | |
| 124 virtual bool ComputesOwnOverflowArea() MOZ_OVERRIDE { return true; } | |
| 125 | |
| 126 protected: | |
| 127 class nsPositionChangedEvent; | |
| 128 friend class nsPositionChangedEvent; | |
| 129 | |
| 130 class nsPositionChangedEvent : public nsRunnable | |
| 131 { | |
| 132 public: | |
| 133 nsPositionChangedEvent(nsListBoxBodyFrame* aFrame, | |
| 134 bool aUp, int32_t aDelta) : | |
| 135 mFrame(aFrame), mUp(aUp), mDelta(aDelta) | |
| 136 {} | |
| 137 | |
| 138 NS_IMETHOD Run() MOZ_OVERRIDE | |
| 139 { | |
| 140 if (!mFrame) { | |
| 141 return NS_OK; | |
| 142 } | |
| 143 | |
| 144 mFrame->mPendingPositionChangeEvents.RemoveElement(this); | |
| 145 | |
| 146 return mFrame->DoInternalPositionChanged(mUp, mDelta); | |
| 147 } | |
| 148 | |
| 149 void Revoke() { | |
| 150 mFrame = nullptr; | |
| 151 } | |
| 152 | |
| 153 nsListBoxBodyFrame* mFrame; | |
| 154 bool mUp; | |
| 155 int32_t mDelta; | |
| 156 }; | |
| 157 | |
| 158 void ComputeTotalRowCount(); | |
| 159 void RemoveChildFrame(nsBoxLayoutState &aState, nsIFrame *aChild); | |
| 160 | |
| 161 nsTArray< nsRefPtr<nsPositionChangedEvent> > mPendingPositionChangeEvents; | |
| 162 nsCOMPtr<nsPIBoxObject> mBoxObject; | |
| 163 | |
| 164 // frame markers | |
| 165 nsWeakFrame mTopFrame; | |
| 166 nsIFrame* mBottomFrame; | |
| 167 nsIFrame* mLinkupFrame; | |
| 168 | |
| 169 nsListScrollSmoother* mScrollSmoother; | |
| 170 | |
| 171 int32_t mRowsToPrepend; | |
| 172 | |
| 173 // row height | |
| 174 int32_t mRowCount; | |
| 175 nscoord mRowHeight; | |
| 176 nscoord mAvailableHeight; | |
| 177 nscoord mStringWidth; | |
| 178 | |
| 179 // scrolling | |
| 180 int32_t mCurrentIndex; // Row-based | |
| 181 int32_t mOldIndex; | |
| 182 int32_t mYPosition; | |
| 183 int32_t mTimePerRow; | |
| 184 | |
| 185 // row height | |
| 186 bool mRowHeightWasSet; | |
| 187 // scrolling | |
| 188 bool mScrolling; | |
| 189 bool mAdjustScroll; | |
| 190 | |
| 191 bool mReflowCallbackPosted; | |
| 192 }; | |
| 193 | |
| 194 #endif // nsListBoxBodyFrame_h |
