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gecko-dev/layout/generic/nsFrameSelection.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "WordMovementType.h"
#include "CaretAssociationHint.h"
#include "nsBidiPresUtils.h"
class nsRange;
#define BIDI_LEVEL_UNDEFINED 0x80
//----------------------------------------------------------------------
// Selection interface
struct SelectionDetails {
SelectionDetails()
: mStart(), mEnd(), mSelectionType(mozilla::SelectionType::eInvalid) {
MOZ_COUNT_CTOR(SelectionDetails);
}
#ifdef NS_BUILD_REFCNT_LOGGING
~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;
};
namespace mozilla {
class PresShell;
} // namespace mozilla
/** 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 {
enum class ForceEditableRegion {
No,
Yes,
};
nsPeekOffsetStruct(
nsSelectionAmount aAmount, nsDirection aDirection, int32_t aStartOffset,
nsPoint aDesiredPos, bool aJumpLines, bool aScrollViewStop,
bool aIsKeyboardSelect, bool aVisual, bool aExtend,
ForceEditableRegion = ForceEditableRegion::No,
mozilla::EWordMovementType aWordMovementType = mozilla::eDefaultBehavior,
bool aTrimSpaces = true);
// 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.
// The type of movement requested (by character, word, line, etc.)
nsSelectionAmount mAmount;
// 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;
// Offset into the content of the current frame where the peek starts.
//
// Used with: eSelectCharacter, eSelectWord
int32_t mStartOffset;
// 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;
// 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;
// Whether to allow jumping across line boundaries.
//
// Used with: eSelectCharacter, eSelectWord.
bool mJumpLines;
// mTrimSpaces: Whether we should trim spaces at begin/end of content
bool mTrimSpaces;
// Whether to stop when reaching a scroll view boundary.
//
// Used with: eSelectCharacter, eSelectWord, eSelectLine.
bool mScrollViewStop;
// Whether the peeking is done in response to a keyboard action.
//
// Used with: eSelectWord.
bool mIsKeyboardSelect;
// Whether bidi caret behavior is visual (true) or logical (false).
//
// Used with: eSelectCharacter, eSelectWord, eSelectBeginLine, eSelectEndLine.
bool mVisual;
// Whether the selection is being extended or moved.
bool mExtend;
// If true, the offset has to end up in an editable node, otherwise we'll keep
// searching.
const bool mForceEditableRegion;
/*** Output arguments ***/
// Content reached as a result of the peek.
nsCOMPtr<nsIContent> mResultContent;
// Frame reached as a result of the peek.
//
// Used with: eSelectCharacter, eSelectWord.
nsIFrame* mResultFrame;
// Offset into content reached as a result of the peek.
int32_t mContentOffset;
// 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 {
class SelectionChangeEventDispatcher;
namespace dom {
class Selection;
} // namespace dom
/**
* Constants for places that want to handle table selections. These
* indicate what part of a table is being selected.
*/
enum class TableSelection : uint32_t {
None, /* Nothing being selected; not valid in all cases. */
Cell, /* A cell is being selected. */
Row, /* A row is being selected. */
Column, /* A column is being selected. */
Table, /* A table (including cells and captions) is being selected. */
AllCells, /* All the cells in a table are being selected. */
};
} // 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 aPresShell 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(mozilla::PresShell* aPresShell, 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
*/
MOZ_CAN_RUN_SCRIPT_BOUNDARY
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, const 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
* * 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,
mozilla::TableSelection 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, const nsPoint& aPoint,
uint32_t aDelay);
/**
* Stops any active auto scroll timer.
*/
void StopAutoScrollTimer();
/**
* 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;
/**
* Sets the drag state to aState for resons of drag state.
*
* @param aState is the new state of drag
*/
MOZ_CAN_RUN_SCRIPT_BOUNDARY
void SetDragState(bool aState);
/**
* 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 != mozilla::TableSelection::None;
}
void ClearTableCellSelection() {
mSelectingTableCellMode = mozilla::TableSelection::None;
}
/**
* 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);
/**
* 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;
/**
* GetFrameToPageSelect() returns a frame which is ancestor limit of
* per-page selection. The frame may not be scrollable. E.g.,
* when selection ancestor limit is set to a frame of an editing host of
* contenteditable element and it's not scrollable.
*/
nsIFrame* GetFrameToPageSelect() 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 aFrame the frame to scroll or container of per-page selection.
* if aExtend is true and selection may have ancestor limit,
* should set result of GetFrameToPageSelect().
*/
MOZ_CAN_RUN_SCRIPT
void CommonPageMove(bool aForward, bool aExtend, nsIFrame* aFrame);
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
*/
MOZ_CAN_RUN_SCRIPT_BOUNDARY
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
*/
MOZ_CAN_RUN_SCRIPT_BOUNDARY 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.
*
* @param 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; }
MOZ_CAN_RUN_SCRIPT_BOUNDARY 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
* @param 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,
const nsPoint& aPoint,
nsIFrame** aRetFrame,
nsPoint& aRetPoint);
nsFrameSelection();
void StartBatchChanges();
MOZ_CAN_RUN_SCRIPT_BOUNDARY
void EndBatchChanges(int16_t aReason = nsISelectionListener::NO_REASON);
/*unsafe*/
nsresult DeleteFromDocument();
mozilla::PresShell* GetPresShell() const { return mPresShell; }
void DisconnectFromPresShell();
nsresult ClearNormalSelection();
private:
~nsFrameSelection();
MOZ_CAN_RUN_SCRIPT
nsresult TakeFocus(nsIContent* aNewFocus, uint32_t aContentOffset,
uint32_t aContentEndOffset, CaretAssociateHint aHint,
bool aContinueSelection, bool aMultipleSelection);
void BidiLevelFromMove(mozilla::PresShell* 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::SelectionChangeEventDispatcher;
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 };
MOZ_CAN_RUN_SCRIPT_BOUNDARY
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.
MOZ_CAN_RUN_SCRIPT
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);
// Table selection support.
nsITableCellLayout* GetCellLayout(nsIContent* aCellContent) const;
nsresult SelectBlockOfCells(nsIContent* aStartNode, nsIContent* aEndNode);
nsresult SelectRowOrColumn(nsIContent* aCellContent,
mozilla::TableSelection 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);
////////////BEGIN nsFrameSelection members
RefPtr<mozilla::dom::Selection>
mDomSelections[sizeof(mozilla::kPresentSelectionTypes) /
sizeof(mozilla::SelectionType)];
nsCOMPtr<nsINode> mCellParent; // used to snap to table selection
nsCOMPtr<nsIContent> mStartSelectedCell;
nsCOMPtr<nsIContent> mEndSelectedCell;
nsCOMPtr<nsIContent> mAppendStartSelectedCell;
nsCOMPtr<nsIContent> mUnselectCellOnMouseUp;
mozilla::TableSelection mSelectingTableCellMode =
mozilla::TableSelection::None;
int32_t mSelectedCellIndex = 0;
// maintain selection
RefPtr<nsRange> mMaintainRange;
nsSelectionAmount mMaintainedAmount = eSelectNoAmount;
// batching
int32_t mBatching = 0;
// Limit selection navigation to a child of this node.
nsCOMPtr<nsIContent> mLimiter;
// Limit selection navigation to a descendant of this node.
nsCOMPtr<nsIContent> mAncestorLimiter;
mozilla::PresShell* mPresShell = nullptr;
// Reason for notifications of selection changing.
int16_t mSelectionChangeReason = nsISelectionListener::NO_REASON;
// For visual display purposes.
int16_t mDisplaySelection = nsISelectionController::SELECTION_OFF;
// Hint to tell if the selection is at the end of this line or beginning of
// next.
CaretAssociateHint mHint = mozilla::CARET_ASSOCIATE_BEFORE;
nsBidiLevel mCaretBidiLevel = BIDI_LEVEL_UNDEFINED;
nsBidiLevel mKbdBidiLevel = NSBIDI_LTR;
nsPoint mDesiredPos;
bool mDelayedMouseEventValid = false;
// These values are not used since they are only valid when
// mDelayedMouseEventValid is true, and setting mDelayedMouseEventValid
// always overrides these values.
uint32_t mDelayedMouseEventClickCount = 0;
bool mDelayedMouseEventIsShift = false;
bool mChangesDuringBatching = false;
bool mNotifyFrames = true;
bool mDragSelectingCells = false;
bool mDragState = false; // for drag purposes
bool mMouseDoubleDownState = false; // has the doubleclick down happened
bool mDesiredPosSet = false;
bool mAccessibleCaretEnabled = false;
int8_t mCaretMovementStyle = 0;
static bool sSelectionEventsEnabled;
static bool sSelectionEventsOnTextControlsEnabled;
};
#endif /* nsFrameSelection_h___ */
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