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gecko-dev/layout/generic/nsFrameSelection.h
Masayuki Nakano 3bd4299525 Bug 1393348 - part2: nsISelectionController::SELECTION_* should be sequential integer values r=smaug 
nsISelectionController::SELECTION_* are declared as bit-mask.  However, no
methods of nsISelectionController treat them as bit-mask and these
values need a switch statement in nsFrameSelection to convert SelectionType to
array index of nsFrameSelection::mDOMSelections because it's too big to create
an array to do it.  Additionally, this conversion appears profile of
attachment 8848015.

So, now, we should declare these values as sequential integer values.

However, only nsTextFrame uses these values as bit-mask.  Therefore, this patch
adds new type, SelectionTypeMask and creates new inline method,
ToSelectionTypeMask(SelectionType), to retrieve mask value for a SelectionType.

MozReview-Commit-ID: 5Za8mA6iu4

--HG--
extra : rebase_source : 86617c1f5fa23166458f4353cb834f9e7c5b131b
2017-08-24 19:14:04 +09:00

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/* 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 "mozilla/UniquePtr.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;
#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;
mozilla::SelectionType mSelectionType;
mozilla::TextRangeStyle mTextRangeStyle;
mozilla::UniquePtr<SelectionDetails> mNext;
};
struct SelectionCustomColors
{
#ifdef NS_BUILD_REFCNT_LOGGING
SelectionCustomColors()
{
MOZ_COUNT_CTOR(SelectionCustomColors);
}
~SelectionCustomColors()
{
MOZ_COUNT_DTOR(SelectionCustomColors);
}
#endif
mozilla::Maybe<nscolor> mForegroundColor;
mozilla::Maybe<nscolor> mBackgroundColor;
mozilla::Maybe<nscolor> mAltForegroundColor;
mozilla::Maybe<nscolor> mAltBackgroundColor;
};
class nsIPresShell;
/** 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,
bool aExtend,
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;
// mExtend: Whether the selection is being extended or moved.
bool mExtend;
/*** 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.
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 SelectionChangeListener;
} // namespace dom
} // namespace mozilla
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 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
* @param aAccessibleCaretEnabled true if we should enable the accessible caret.
*/
void Init(nsIPresShell *aShell, nsIContent *aLimiter,
bool aAccessibleCaretEnabled);
/** 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.
*/
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
*/
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
*/
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
*/
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 aSlowCheck will check using slow method with no shortcuts
*/
mozilla::UniquePtr<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 The selection type what you want.
*/
mozilla::dom::Selection*
GetSelection(mozilla::SelectionType aSelectionType) const;
/**
* ScrollSelectionIntoView scrolls a region of the selection,
* so that it is visible in the scrolled view.
*
* @param aSelectionType 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(mozilla::SelectionType aSelectionType,
SelectionRegion aRegion,
int16_t aFlags) const;
/** RepaintSelection repaints the selected frames that are inside the selection
* specified by aSelectionType.
* @param aSelectionType The selection type what you want to repaint.
*/
nsresult RepaintSelection(mozilla::SelectionType aSelectionType);
/** 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.
*/
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
*/
void SetCaretBidiLevel(nsBidiLevel aLevel);
/**
* GetCaretBidiLevel gets the caret bidi level.
*/
nsBidiLevel GetCaretBidiLevel() const;
/**
* UndefineCaretBidiLevel sets the caret bidi level to "undefined".
*/
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;
}
bool MouseDownRecorded()
{
return !GetDragState() &&
HasDelayedCaretData() &&
GetClickCountInDelayedCaretData() < 2;
}
/** 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.
*/
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(int16_t aReason = nsISelectionListener::NO_REASON);
/*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;
friend class mozilla::dom::SelectionChangeListener;
friend struct mozilla::AutoPrepareFocusRange;
#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(mozilla::SelectionType aSelectionType);
// Update the selection cache on repaint when the
// selection being repainted is not empty.
nsresult UpdateSelectionCacheOnRepaintSelection(mozilla::dom::
Selection* aSel);
RefPtr<mozilla::dom::Selection>
mDomSelections[
sizeof(mozilla::kPresentSelectionTypes) / sizeof(mozilla::SelectionType)];
// 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* aContainer, 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
RefPtr<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.
CaretAssociateHint mHint; //hint to tell if the selection is at the end of this line or beginning of next
nsBidiLevel mCaretBidiLevel;
nsBidiLevel mKbdBidiLevel;
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;
bool mAccessibleCaretEnabled;
int8_t mCaretMovementStyle;
static bool sSelectionEventsEnabled;
static bool sSelectionEventsOnTextControlsEnabled;
};
#endif /* nsFrameSelection_h___ */
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