Revision 838bebb936d4440c16c7e109e50203b80ad8a1bf authored by Brad Lassey on 23 January 2014, 20:00:17 UTC, committed by Brad Lassey on 23 January 2014, 20:00:17 UTC
1 parent 4d5f91b
nsFrameSelection.h
/* 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/Selection.h"
#include "mozilla/TextRange.h"
#include "nsIFrame.h"
#include "nsIContent.h"
#include "nsISelectionController.h"
#include "nsITableCellLayout.h"
#include "nsIDOMElement.h"
#include "nsRange.h"
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 } }
#ifdef IBMBIDI // Constant for Set/Get CaretBidiLevel
#define BIDI_LEVEL_UNDEFINED 0x80
#endif
//----------------------------------------------------------------------
// 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;
enum EWordMovementType { eStartWord, eEndWord, eDefaultBehavior };
/** 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,
nscoord aDesiredX,
bool aJumpLines,
bool aScrollViewStop,
bool aIsKeyboardSelect,
bool aVisual,
EWordMovementType aWordMovementType = eDefaultBehavior)
: mAmount(aAmount)
, mDirection(aDirection)
, mStartOffset(aStartOffset)
, mDesiredX(aDesiredX)
, mWordMovementType(aWordMovementType)
, mJumpLines(aJumpLines)
, mScrollViewStop(aScrollViewStop)
, mIsKeyboardSelect(aIsKeyboardSelect)
, mVisual(aVisual)
, mResultContent()
, mResultFrame(nullptr)
, mContentOffset(0)
, mAttachForward(false)
{
}
// 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;
// mDesiredX: The desired x coordinate for the caret.
// Used with: eSelectLine.
nscoord mDesiredX;
// 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"
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<nsIContent> 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.
bool mAttachForward;
};
struct nsPrevNextBidiLevels
{
void SetData(nsIFrame* aFrameBefore,
nsIFrame* aFrameAfter,
uint8_t aLevelBefore,
uint8_t aLevelAfter)
{
mFrameBefore = aFrameBefore;
mFrameAfter = aFrameAfter;
mLevelBefore = aLevelBefore;
mLevelAfter = aLevelAfter;
}
nsIFrame* mFrameBefore;
nsIFrame* mFrameAfter;
uint8_t mLevelBefore;
uint8_t mLevelAfter;
};
namespace mozilla {
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:
enum HINT { HINTLEFT = 0, HINTRIGHT = 1}; //end of this line or beginning of next
/*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,
bool 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;
/** SetMouseDownState(bool);
* sets the mouse state to aState for resons of drag state.
* @param aState is the new state of mousedown
*/
/*unsafe*/
void SetMouseDownState(bool aState);
/** GetMouseDownState(bool *);
* gets the mouse state to aState for resons of drag state.
* @param aState will hold the state of mousedown
*/
bool GetMouseDownState() const { return mMouseDownState; }
/**
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::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,
HINT 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(HINT aHintRight) { mHint = aHintRight; }
HINT GetHint() const { return mHint; }
#ifdef IBMBIDI
/** 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 (uint8_t aLevel);
/** GetCaretBidiLevel gets the caret bidi level
* This method is virtual since it gets called from outside of layout.
*/
virtual uint8_t 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();
#endif
/** 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,
uint8_t 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);
nsFrameSelection();
void StartBatchChanges();
void EndBatchChanges();
/*unsafe*/
nsresult DeleteFromDocument();
nsIPresShell *GetShell()const { return mShell; }
void DisconnectFromPresShell();
nsresult ClearNormalSelection();
private:
nsresult TakeFocus(nsIContent *aNewFocus,
uint32_t aContentOffset,
uint32_t aContentEndOffset,
HINT aHint,
bool aContinueSelection,
bool aMultipleSelection);
void BidiLevelFromMove(nsIPresShell* aPresShell,
nsIContent *aNode,
uint32_t aContentOffset,
uint32_t aKeycode,
HINT aHint);
void BidiLevelFromClick(nsIContent *aNewFocus, uint32_t aContentOffset);
nsPrevNextBidiLevels GetPrevNextBidiLevels(nsIContent *aNode,
uint32_t aContentOffset,
HINT 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 = 0;
return retval;
}
friend class mozilla::Selection;
#ifdef DEBUG
void printSelection(); // for debugging
#endif /* DEBUG */
void ResizeBuffer(uint32_t aNewBufSize);
/*HELPER METHODS*/
nsresult MoveCaret(uint32_t aKeycode, bool aContinueSelection,
nsSelectionAmount aAmount);
nsresult MoveCaret(uint32_t aKeycode, bool aContinueSelection,
nsSelectionAmount aAmount,
bool aVisualMovement);
nsresult FetchDesiredX(nscoord &aDesiredX); //the x position requested by the Key Handling for up down
void InvalidateDesiredX(); //do not listen to mDesiredX you must get another.
void SetDesiredX(nscoord aX); //set the mDesiredX
nsresult ConstrainFrameAndPointToAnchorSubtree(nsIFrame *aFrame, nsPoint& aPoint, nsIFrame **aRetFrame, nsPoint& aRetPoint);
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<mozilla::Selection> 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<nsINode> mCellParent; //used to snap to table selection
nsCOMPtr<nsIContent> mStartSelectedCell;
nsCOMPtr<nsIContent> mEndSelectedCell;
nsCOMPtr<nsIContent> mAppendStartSelectedCell;
nsCOMPtr<nsIContent> mUnselectCellOnMouseUp;
int32_t mSelectingTableCellMode;
int32_t mSelectedCellIndex;
// maintain selection
nsRefPtr<nsRange> mMaintainRange;
nsSelectionAmount mMaintainedAmount;
//batching
int32_t mBatching;
// Limit selection navigation to a child of this node.
nsCOMPtr<nsIContent> mLimiter;
// Limit selection navigation to a descendant of this node.
nsCOMPtr<nsIContent> mAncestorLimiter;
nsIPresShell *mShell;
int16_t mSelectionChangeReason; // reason for notifications of selection changing
int16_t mDisplaySelection; //for visual display purposes.
HINT mHint; //hint to tell if the selection is at the end of this line or beginning of next
#ifdef IBMBIDI
uint8_t mCaretBidiLevel;
#endif
int32_t mDesiredX;
uint32_t mDelayedMouseEventClickCount;
bool mDelayedMouseEventIsShift;
bool mDelayedMouseEventValid;
bool mChangesDuringBatching;
bool mNotifyFrames;
bool mDragSelectingCells;
bool mMouseDownState; //for drag purposes
bool mMouseDoubleDownState; //has the doubleclick down happened
bool mDesiredXSet;
int8_t mCaretMovementStyle;
};
#endif /* nsFrameSelection_h___ */
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