/* 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 nsFrameSelection_h___ #define nsFrameSelection_h___ #include "mozilla/Attributes.h" #include "mozilla/EventForwards.h" #include "mozilla/dom/Selection.h" #include "mozilla/TextRange.h" #include "nsIFrame.h" #include "nsIContent.h" #include "nsISelectionController.h" #include "nsISelectionListener.h" #include "nsITableCellLayout.h" #include "nsIDOMElement.h" #include "WordMovementType.h" #include "CaretAssociationHint.h" #include "nsBidiPresUtils.h" class nsRange; class nsTableOuterFrame; // IID for the nsFrameSelection interface // 3c6ae2d0-4cf1-44a1-9e9d-2411867f19c6 #define NS_FRAME_SELECTION_IID \ { 0x3c6ae2d0, 0x4cf1, 0x44a1, \ { 0x9e, 0x9d, 0x24, 0x11, 0x86, 0x7f, 0x19, 0xc6 } } #define BIDI_LEVEL_UNDEFINED 0x80 //---------------------------------------------------------------------- // Selection interface struct SelectionDetails { #ifdef NS_BUILD_REFCNT_LOGGING SelectionDetails() { MOZ_COUNT_CTOR(SelectionDetails); } ~SelectionDetails() { MOZ_COUNT_DTOR(SelectionDetails); } #endif int32_t mStart; int32_t mEnd; SelectionType mType; mozilla::TextRangeStyle mTextRangeStyle; SelectionDetails *mNext; }; class nsIPresShell; class nsIScrollableFrame; /** PeekOffsetStruct is used to group various arguments (both input and output) * that are passed to nsFrame::PeekOffset(). See below for the description of * individual arguments. */ struct MOZ_STACK_CLASS nsPeekOffsetStruct { nsPeekOffsetStruct(nsSelectionAmount aAmount, nsDirection aDirection, int32_t aStartOffset, nsPoint aDesiredPos, bool aJumpLines, bool aScrollViewStop, bool aIsKeyboardSelect, bool aVisual, mozilla::EWordMovementType aWordMovementType = mozilla::eDefaultBehavior); // Note: Most arguments (input and output) are only used with certain values // of mAmount. These values are indicated for each argument below. // Arguments with no such indication are used with all values of mAmount. /*** Input arguments ***/ // Note: The value of some of the input arguments may be changed upon exit. // mAmount: The type of movement requested (by character, word, line, etc.) nsSelectionAmount mAmount; // mDirection: eDirPrevious or eDirNext. // * Note for visual bidi movement: // eDirPrevious means 'left-then-up' if the containing block is LTR, // 'right-then-up' if it is RTL. // eDirNext means 'right-then-down' if the containing block is LTR, // 'left-then-down' if it is RTL. // Between paragraphs, eDirPrevious means "go to the visual end of the // previous paragraph", and eDirNext means "go to the visual beginning // of the next paragraph". // Used with: eSelectCharacter, eSelectWord, eSelectLine, eSelectParagraph. nsDirection mDirection; // mStartOffset: Offset into the content of the current frame where the peek starts. // Used with: eSelectCharacter, eSelectWord int32_t mStartOffset; // mDesiredPos: The desired inline coordinate for the caret // (one of .x or .y will be used, depending on line's writing mode) // Used with: eSelectLine. nsPoint mDesiredPos; // mWordMovementType: An enum that determines whether to prefer the start or end of a word // or to use the default beahvior, which is a combination of // direction and the platform-based pref // "layout.word_select.eat_space_to_next_word" mozilla::EWordMovementType mWordMovementType; // mJumpLines: Whether to allow jumping across line boundaries. // Used with: eSelectCharacter, eSelectWord. bool mJumpLines; // mScrollViewStop: Whether to stop when reaching a scroll view boundary. // Used with: eSelectCharacter, eSelectWord, eSelectLine. bool mScrollViewStop; // mIsKeyboardSelect: Whether the peeking is done in response to a keyboard action. // Used with: eSelectWord. bool mIsKeyboardSelect; // mVisual: Whether bidi caret behavior is visual (true) or logical (false). // Used with: eSelectCharacter, eSelectWord, eSelectBeginLine, eSelectEndLine. bool mVisual; /*** Output arguments ***/ // mResultContent: Content reached as a result of the peek. nsCOMPtr mResultContent; // mResultFrame: Frame reached as a result of the peek. // Used with: eSelectCharacter, eSelectWord. nsIFrame *mResultFrame; // mContentOffset: Offset into content reached as a result of the peek. int32_t mContentOffset; // mAttachForward: When the result position is between two frames, // indicates which of the two frames the caret should be painted in. // false means "the end of the frame logically before the caret", // true means "the beginning of the frame logically after the caret". // Used with: eSelectLine, eSelectBeginLine, eSelectEndLine. mozilla::CaretAssociationHint mAttach; }; struct nsPrevNextBidiLevels { void SetData(nsIFrame* aFrameBefore, nsIFrame* aFrameAfter, nsBidiLevel aLevelBefore, nsBidiLevel aLevelAfter) { mFrameBefore = aFrameBefore; mFrameAfter = aFrameAfter; mLevelBefore = aLevelBefore; mLevelAfter = aLevelAfter; } nsIFrame* mFrameBefore; nsIFrame* mFrameAfter; nsBidiLevel mLevelBefore; nsBidiLevel mLevelAfter; }; namespace mozilla { namespace dom { class Selection; } } class nsIScrollableFrame; /** * Methods which are marked with *unsafe* should be handled with special care. * They may cause nsFrameSelection to be deleted, if strong pointer isn't used, * or they may cause other objects to be deleted. */ class nsFrameSelection MOZ_FINAL { public: typedef mozilla::CaretAssociationHint CaretAssociateHint; /*interfaces for addref and release and queryinterface*/ NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(nsFrameSelection) NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(nsFrameSelection) /** Init will initialize the frame selector with the necessary pres shell to * be used by most of the methods * @param aShell is the parameter to be used for most of the other calls for callbacks etc * @param aLimiter limits the selection to nodes with aLimiter parents */ void Init(nsIPresShell *aShell, nsIContent *aLimiter); /** HandleClick will take the focus to the new frame at the new offset and * will either extend the selection from the old anchor, or replace the old anchor. * the old anchor and focus position may also be used to deselect things * @param aNewfocus is the content that wants the focus * @param aContentOffset is the content offset of the parent aNewFocus * @param aContentOffsetEnd is the content offset of the parent aNewFocus and is specified different * when you need to select to and include both start and end points * @param aContinueSelection is the flag that tells the selection to keep the old anchor point or not. * @param aMultipleSelection will tell the frame selector to replace /or not the old selection. * cannot coexist with aContinueSelection * @param aHint will tell the selection which direction geometrically to actually show the caret on. * 1 = end of this line 0 = beginning of this line */ /*unsafe*/ nsresult HandleClick(nsIContent *aNewFocus, uint32_t aContentOffset, uint32_t aContentEndOffset, bool aContinueSelection, bool aMultipleSelection, CaretAssociateHint aHint); /** HandleDrag extends the selection to contain the frame closest to aPoint. * @param aPresContext is the context to use when figuring out what frame contains the point. * @param aFrame is the parent of all frames to use when searching for the closest frame to the point. * @param aPoint is relative to aFrame */ /*unsafe*/ void HandleDrag(nsIFrame *aFrame, nsPoint aPoint); /** HandleTableSelection will set selection to a table, cell, etc * depending on information contained in aFlags * @param aParentContent is the paretent of either a table or cell that user clicked or dragged the mouse in * @param aContentOffset is the offset of the table or cell * @param aTarget indicates what to select (defined in nsISelectionPrivate.idl/nsISelectionPrivate.h): * TABLESELECTION_CELL We should select a cell (content points to the cell) * TABLESELECTION_ROW We should select a row (content points to any cell in row) * TABLESELECTION_COLUMN We should select a row (content points to any cell in column) * TABLESELECTION_TABLE We should select a table (content points to the table) * TABLESELECTION_ALLCELLS We should select all cells (content points to any cell in table) * @param aMouseEvent passed in so we can get where event occurred and what keys are pressed */ /*unsafe*/ nsresult HandleTableSelection(nsINode* aParentContent, int32_t aContentOffset, int32_t aTarget, mozilla::WidgetMouseEvent* aMouseEvent); /** * Add cell to the selection. * * @param aCell [in] HTML td element. */ virtual nsresult SelectCellElement(nsIContent *aCell); /** * Add cells to the selection inside of the given cells range. * * @param aTable [in] HTML table element * @param aStartRowIndex [in] row index where the cells range starts * @param aStartColumnIndex [in] column index where the cells range starts * @param aEndRowIndex [in] row index where the cells range ends * @param aEndColumnIndex [in] column index where the cells range ends */ virtual nsresult AddCellsToSelection(nsIContent *aTable, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex); /** * Remove cells from selection inside of the given cell range. * * @param aTable [in] HTML table element * @param aStartRowIndex [in] row index where the cells range starts * @param aStartColumnIndex [in] column index where the cells range starts * @param aEndRowIndex [in] row index where the cells range ends * @param aEndColumnIndex [in] column index where the cells range ends */ virtual nsresult RemoveCellsFromSelection(nsIContent *aTable, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex); /** * Remove cells from selection outside of the given cell range. * * @param aTable [in] HTML table element * @param aStartRowIndex [in] row index where the cells range starts * @param aStartColumnIndex [in] column index where the cells range starts * @param aEndRowIndex [in] row index where the cells range ends * @param aEndColumnIndex [in] column index where the cells range ends */ virtual nsresult RestrictCellsToSelection(nsIContent *aTable, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex); /** StartAutoScrollTimer is responsible for scrolling frames so that * aPoint is always visible, and for selecting any frame that contains * aPoint. The timer will also reset itself to fire again if we have * not scrolled to the end of the document. * @param aFrame is the outermost frame to use when searching for * the closest frame for the point, i.e. the frame that is capturing * the mouse * @param aPoint is relative to aFrame. * @param aDelay is the timer's interval. */ /*unsafe*/ nsresult StartAutoScrollTimer(nsIFrame *aFrame, nsPoint aPoint, uint32_t aDelay); /** StopAutoScrollTimer stops any active auto scroll timer. */ void StopAutoScrollTimer(); /** Lookup Selection * returns in frame coordinates the selection beginning and ending with the type of selection given * @param aContent is the content asking * @param aContentOffset is the starting content boundary * @param aContentLength is the length of the content piece asking * @param aReturnDetails linkedlist of return values for the selection. * @param aSlowCheck will check using slow method with no shortcuts */ SelectionDetails* LookUpSelection(nsIContent *aContent, int32_t aContentOffset, int32_t aContentLength, bool aSlowCheck) const; /** SetDragState(bool); * sets the drag state to aState for resons of drag state. * @param aState is the new state of drag */ /*unsafe*/ void SetDragState(bool aState); /** GetDragState(bool *); * gets the drag state to aState for resons of drag state. * @param aState will hold the state of drag */ bool GetDragState() const { return mDragState; } /** if we are in table cell selection mode. aka ctrl click in table cell */ bool GetTableCellSelection() const { return mSelectingTableCellMode != 0; } void ClearTableCellSelection() { mSelectingTableCellMode = 0; } /** GetSelection * no query interface for selection. must use this method now. * @param aSelectionType enum value defined in nsISelection for the seleciton you want. */ mozilla::dom::Selection* GetSelection(SelectionType aType) const; /** * ScrollSelectionIntoView scrolls a region of the selection, * so that it is visible in the scrolled view. * * @param aType the selection to scroll into view. * @param aRegion the region inside the selection to scroll into view. * @param aFlags the scroll flags. Valid bits include: * SCROLL_SYNCHRONOUS: when set, scrolls the selection into view * before returning. If not set, posts a request which is processed * at some point after the method returns. * SCROLL_FIRST_ANCESTOR_ONLY: if set, only the first ancestor will be scrolled * into view. */ /*unsafe*/ nsresult ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, int16_t aFlags) const; /** RepaintSelection repaints the selected frames that are inside the selection * specified by aSelectionType. * @param aSelectionType enum value defined in nsISelection for the seleciton you want. */ nsresult RepaintSelection(SelectionType aType) const; /** GetFrameForNodeOffset given a node and its child offset, return the nsIFrame and * the offset into that frame. * @param aNode input parameter for the node to look at * @param aOffset offset into above node. * @param aReturnOffset will contain offset into frame. */ virtual nsIFrame* GetFrameForNodeOffset(nsIContent* aNode, int32_t aOffset, CaretAssociateHint aHint, int32_t* aReturnOffset) const; /** * Scrolling then moving caret placement code in common to text areas and * content areas should be located in the implementer * This method will accept the following parameters and perform the scroll * and caret movement. It remains for the caller to call the final * ScrollCaretIntoView if that called wants to be sure the caret is always * visible. * * @param aForward if true, scroll forward if not scroll backward * @param aExtend if true, extend selection to the new point * @param aScrollableFrame the frame to scroll */ /*unsafe*/ void CommonPageMove(bool aForward, bool aExtend, nsIScrollableFrame* aScrollableFrame); void SetHint(CaretAssociateHint aHintRight) { mHint = aHintRight; } CaretAssociateHint GetHint() const { return mHint; } /** SetCaretBidiLevel sets the caret bidi level * @param aLevel the caret bidi level * This method is virtual since it gets called from outside of layout. */ virtual void SetCaretBidiLevel(nsBidiLevel aLevel); /** GetCaretBidiLevel gets the caret bidi level * This method is virtual since it gets called from outside of layout. */ virtual nsBidiLevel GetCaretBidiLevel() const; /** UndefineCaretBidiLevel sets the caret bidi level to "undefined" * This method is virtual since it gets called from outside of layout. */ virtual void UndefineCaretBidiLevel(); /** PhysicalMove will generally be called from the nsiselectioncontroller implementations. * the effect being the selection will move one unit 'aAmount' in the * given aDirection. * @param aDirection the direction to move the selection * @param aAmount amount of movement (char/line; word/page; eol/doc) * @param aExtend continue selection */ /*unsafe*/ nsresult PhysicalMove(int16_t aDirection, int16_t aAmount, bool aExtend); /** CharacterMove will generally be called from the nsiselectioncontroller implementations. * the effect being the selection will move one character left or right. * @param aForward move forward in document. * @param aExtend continue selection */ /*unsafe*/ nsresult CharacterMove(bool aForward, bool aExtend); /** CharacterExtendForDelete extends the selection forward (logically) to * the next character cell, so that the selected cell can be deleted. */ /*unsafe*/ nsresult CharacterExtendForDelete(); /** CharacterExtendForBackspace extends the selection backward (logically) to * the previous character cell, so that the selected cell can be deleted. */ /*unsafe*/ nsresult CharacterExtendForBackspace(); /** WordMove will generally be called from the nsiselectioncontroller implementations. * the effect being the selection will move one word left or right. * @param aForward move forward in document. * @param aExtend continue selection */ /*unsafe*/ nsresult WordMove(bool aForward, bool aExtend); /** WordExtendForDelete extends the selection backward or forward (logically) to the * next word boundary, so that the selected word can be deleted. * @param aForward select forward in document. */ /*unsafe*/ nsresult WordExtendForDelete(bool aForward); /** LineMove will generally be called from the nsiselectioncontroller implementations. * the effect being the selection will move one line up or down. * @param aForward move forward in document. * @param aExtend continue selection */ /*unsafe*/ nsresult LineMove(bool aForward, bool aExtend); /** IntraLineMove will generally be called from the nsiselectioncontroller implementations. * the effect being the selection will move to beginning or end of line * @param aForward move forward in document. * @param aExtend continue selection */ /*unsafe*/ nsresult IntraLineMove(bool aForward, bool aExtend); /** Select All will generally be called from the nsiselectioncontroller implementations. * it will select the whole doc */ /*unsafe*/ nsresult SelectAll(); /** Sets/Gets The display selection enum. */ void SetDisplaySelection(int16_t aState) { mDisplaySelection = aState; } int16_t GetDisplaySelection() const { return mDisplaySelection; } /** This method can be used to store the data received during a MouseDown * event so that we can place the caret during the MouseUp event. * @aMouseEvent the event received by the selection MouseDown * handling method. A nullptr value can be use to tell this method * that any data is storing is no longer valid. */ void SetDelayedCaretData(mozilla::WidgetMouseEvent* aMouseEvent); /** Get the delayed MouseDown event data necessary to place the * caret during MouseUp processing. * @return a pointer to the event received * by the selection during MouseDown processing. It can be nullptr * if the data is no longer valid. */ bool HasDelayedCaretData() { return mDelayedMouseEventValid; } bool IsShiftDownInDelayedCaretData() { NS_ASSERTION(mDelayedMouseEventValid, "No valid delayed caret data"); return mDelayedMouseEventIsShift; } uint32_t GetClickCountInDelayedCaretData() { NS_ASSERTION(mDelayedMouseEventValid, "No valid delayed caret data"); return mDelayedMouseEventClickCount; } /** Get the content node that limits the selection * When searching up a nodes for parents, as in a text edit field * in an browser page, we must stop at this node else we reach into the * parent page, which is very bad! */ nsIContent* GetLimiter() const { return mLimiter; } nsIContent* GetAncestorLimiter() const { return mAncestorLimiter; } /*unsafe*/ void SetAncestorLimiter(nsIContent *aLimiter); /** This will tell the frame selection that a double click has been pressed * so it can track abort future drags if inside the same selection * @aDoubleDown has the double click down happened */ void SetMouseDoubleDown(bool aDoubleDown) { mMouseDoubleDownState = aDoubleDown; } /** This will return whether the double down flag was set. * @return whether the double down flag was set */ bool GetMouseDoubleDown() const { return mMouseDoubleDownState; } /** GetPrevNextBidiLevels will return the frames and associated Bidi levels of the characters * logically before and after a (collapsed) selection. * @param aNode is the node containing the selection * @param aContentOffset is the offset of the selection in the node * @param aJumpLines If true, look across line boundaries. * If false, behave as if there were base-level frames at line edges. * * @return A struct holding the before/after frame and the before/after level. * * At the beginning and end of each line there is assumed to be a frame with * Bidi level equal to the paragraph embedding level. * In these cases the before frame and after frame respectively will be * nullptr. * * This method is virtual since it gets called from outside of layout. */ virtual nsPrevNextBidiLevels GetPrevNextBidiLevels(nsIContent *aNode, uint32_t aContentOffset, bool aJumpLines) const; /** GetFrameFromLevel will scan in a given direction * until it finds a frame with a Bidi level less than or equal to a given level. * It will return the last frame before this. * @param aPresContext is the context to use * @param aFrameIn is the frame to start from * @param aDirection is the direction to scan * @param aBidiLevel is the level to search for * @param aFrameOut will hold the frame returned */ nsresult GetFrameFromLevel(nsIFrame *aFrameIn, nsDirection aDirection, nsBidiLevel aBidiLevel, nsIFrame **aFrameOut) const; /** * MaintainSelection will track the current selection as being "sticky". * Dragging or extending selection will never allow for a subset * (or the whole) of the maintained selection to become unselected. * Primary use: double click selecting then dragging on second click * @param aAmount the initial amount of text selected (word, line or paragraph). * For "line", use eSelectBeginLine. */ nsresult MaintainSelection(nsSelectionAmount aAmount = eSelectNoAmount); nsresult ConstrainFrameAndPointToAnchorSubtree(nsIFrame *aFrame, nsPoint& aPoint, nsIFrame **aRetFrame, nsPoint& aRetPoint); nsFrameSelection(); void StartBatchChanges(); void EndBatchChanges(); /*unsafe*/ nsresult DeleteFromDocument(); nsIPresShell *GetShell()const { return mShell; } void DisconnectFromPresShell(); nsresult ClearNormalSelection(); private: ~nsFrameSelection(); nsresult TakeFocus(nsIContent *aNewFocus, uint32_t aContentOffset, uint32_t aContentEndOffset, CaretAssociateHint aHint, bool aContinueSelection, bool aMultipleSelection); void BidiLevelFromMove(nsIPresShell* aPresShell, nsIContent *aNode, uint32_t aContentOffset, nsSelectionAmount aAmount, CaretAssociateHint aHint); void BidiLevelFromClick(nsIContent *aNewFocus, uint32_t aContentOffset); nsPrevNextBidiLevels GetPrevNextBidiLevels(nsIContent *aNode, uint32_t aContentOffset, CaretAssociateHint aHint, bool aJumpLines) const; bool AdjustForMaintainedSelection(nsIContent *aContent, int32_t aOffset); // post and pop reasons for notifications. we may stack these later void PostReason(int16_t aReason) { mSelectionChangeReason = aReason; } int16_t PopReason() { int16_t retval = mSelectionChangeReason; mSelectionChangeReason = nsISelectionListener::NO_REASON; return retval; } bool IsUserSelectionReason() const { return (mSelectionChangeReason & (nsISelectionListener::DRAG_REASON | nsISelectionListener::MOUSEDOWN_REASON | nsISelectionListener::MOUSEUP_REASON | nsISelectionListener::KEYPRESS_REASON)) != nsISelectionListener::NO_REASON; } friend class mozilla::dom::Selection; #ifdef DEBUG void printSelection(); // for debugging #endif /* DEBUG */ void ResizeBuffer(uint32_t aNewBufSize); /*HELPER METHODS*/ // Whether MoveCaret should use logical or visual movement, // or follow the bidi.edit.caret_movement_style preference. enum CaretMovementStyle { eLogical, eVisual, eUsePrefStyle }; nsresult MoveCaret(nsDirection aDirection, bool aContinueSelection, nsSelectionAmount aAmount, CaretMovementStyle aMovementStyle); nsresult FetchDesiredPos(nsPoint &aDesiredPos); //the position requested by the Key Handling for up down void InvalidateDesiredPos(); //do not listen to mDesiredPos you must get another. void SetDesiredPos(nsPoint aPos); //set the mDesiredPos uint32_t GetBatching() const {return mBatching; } bool GetNotifyFrames() const { return mNotifyFrames; } void SetDirty(bool aDirty=true){if (mBatching) mChangesDuringBatching = aDirty;} // nsFrameSelection may get deleted when calling this, // so remember to use nsCOMPtr when needed. nsresult NotifySelectionListeners(SelectionType aType); // add parameters to say collapsed etc? nsRefPtr mDomSelections[nsISelectionController::NUM_SELECTIONTYPES]; // Table selection support. nsITableCellLayout* GetCellLayout(nsIContent *aCellContent) const; nsresult SelectBlockOfCells(nsIContent *aStartNode, nsIContent *aEndNode); nsresult SelectRowOrColumn(nsIContent *aCellContent, uint32_t aTarget); nsresult UnselectCells(nsIContent *aTable, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex, bool aRemoveOutsideOfCellRange); nsresult GetCellIndexes(nsIContent *aCell, int32_t &aRowIndex, int32_t &aColIndex); // Get our first range, if its first selected node is a cell. If this does // not return null, then the first node in the returned range is a cell // (according to GetFirstCellNodeInRange). nsRange* GetFirstCellRange(); // Get our next range, if its first selected node is a cell. If this does // not return null, then the first node in the returned range is a cell // (according to GetFirstCellNodeInRange). nsRange* GetNextCellRange(); nsIContent* GetFirstCellNodeInRange(nsRange *aRange) const; // Returns non-null table if in same table, null otherwise nsIContent* IsInSameTable(nsIContent *aContent1, nsIContent *aContent2) const; // Might return null nsIContent* GetParentTable(nsIContent *aCellNode) const; nsresult CreateAndAddRange(nsINode *aParentNode, int32_t aOffset); nsCOMPtr mCellParent; //used to snap to table selection nsCOMPtr mStartSelectedCell; nsCOMPtr mEndSelectedCell; nsCOMPtr mAppendStartSelectedCell; nsCOMPtr mUnselectCellOnMouseUp; int32_t mSelectingTableCellMode; int32_t mSelectedCellIndex; // maintain selection nsRefPtr mMaintainRange; nsSelectionAmount mMaintainedAmount; //batching int32_t mBatching; // Limit selection navigation to a child of this node. nsCOMPtr mLimiter; // Limit selection navigation to a descendant of this node. nsCOMPtr mAncestorLimiter; nsIPresShell *mShell; int16_t mSelectionChangeReason; // reason for notifications of selection changing int16_t mDisplaySelection; //for visual display purposes. CaretAssociateHint mHint; //hint to tell if the selection is at the end of this line or beginning of next nsBidiLevel mCaretBidiLevel; nsPoint mDesiredPos; uint32_t mDelayedMouseEventClickCount; bool mDelayedMouseEventIsShift; bool mDelayedMouseEventValid; bool mChangesDuringBatching; bool mNotifyFrames; bool mDragSelectingCells; bool mDragState; //for drag purposes bool mMouseDoubleDownState; //has the doubleclick down happened bool mDesiredPosSet; int8_t mCaretMovementStyle; }; #endif /* nsFrameSelection_h___ */