Macintosh-SW
/
tenfourfox
mirror of https://github.com/classilla/tenfourfox.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
tenfourfox/editor/libeditor/nsEditor.h

915 lines
34 KiB
C++
Raw Permalink Blame History

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 __editor_h__
#define __editor_h__
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc.
#include "mozilla/OwningNonNull.h" // for OwningNonNull
#include "mozilla/dom/Text.h"
#include "nsAutoPtr.h" // for nsRefPtr
#include "nsCOMPtr.h" // for already_AddRefed, nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsGkAtoms.h"
#include "nsIEditor.h" // for nsIEditor::EDirection, etc
#include "nsIEditorIMESupport.h" // for NS_DECL_NSIEDITORIMESUPPORT, etc
#include "nsIObserver.h" // for NS_DECL_NSIOBSERVER, etc
#include "nsIPhonetic.h" // for NS_DECL_NSIPHONETIC, etc
#include "nsIPlaintextEditor.h" // for nsIPlaintextEditor, etc
#include "nsISelectionController.h" // for nsISelectionController constants
#include "nsISupportsImpl.h" // for nsEditor::Release, etc
#include "nsIWeakReferenceUtils.h" // for nsWeakPtr
#include "nsLiteralString.h" // for NS_LITERAL_STRING
#include "nsSelectionState.h" // for nsRangeUpdater, etc
#include "nsString.h" // for nsCString
#include "nsWeakReference.h" // for nsSupportsWeakReference
#include "nscore.h" // for nsresult, nsAString, etc
class AddStyleSheetTxn;
class DeleteNodeTxn;
class EditAggregateTxn;
class RemoveStyleSheetTxn;
class nsIAtom;
class nsIContent;
class nsIDOMDocument;
class nsIDOMEvent;
class nsIDOMEventListener;
class nsIDOMEventTarget;
class nsIDOMKeyEvent;
class nsIDOMNode;
class nsIDocument;
class nsIDocumentStateListener;
class nsIEditActionListener;
class nsIEditorObserver;
class nsIInlineSpellChecker;
class nsINode;
class nsIPresShell;
class nsISupports;
class nsITransaction;
class nsIWidget;
class nsRange;
class nsString;
class nsTransactionManager;
struct DOMPoint;
namespace mozilla {
class CSSStyleSheet;
class ErrorResult;
class TextComposition;
namespace dom {
class ChangeAttributeTxn;
class CreateElementTxn;
class DataTransfer;
class DeleteTextTxn;
class Element;
class EventTarget;
class IMETextTxn;
class InsertTextTxn;
class InsertNodeTxn;
class JoinNodeTxn;
class Selection;
class SplitNodeTxn;
class Text;
} // namespace dom
} // namespace mozilla
namespace mozilla {
namespace widget {
struct IMEState;
} // namespace widget
} // namespace mozilla
#define kMOZEditorBogusNodeAttrAtom nsGkAtoms::mozeditorbogusnode
#define kMOZEditorBogusNodeValue NS_LITERAL_STRING("TRUE")
// This is int32_t instead of int16_t because nsIInlineSpellChecker.idl's
// spellCheckAfterEditorChange is defined to take it as a long.
enum class EditAction : int32_t {
ignore = -1,
none = 0,
undo,
redo,
insertNode,
createNode,
deleteNode,
splitNode,
joinNode,
deleteText = 1003,
// text commands
insertText = 2000,
insertIMEText = 2001,
deleteSelection = 2002,
setTextProperty = 2003,
removeTextProperty = 2004,
outputText = 2005,
// html only action
insertBreak = 3000,
makeList = 3001,
indent = 3002,
outdent = 3003,
align = 3004,
makeBasicBlock = 3005,
removeList = 3006,
makeDefListItem = 3007,
insertElement = 3008,
insertQuotation = 3009,
htmlPaste = 3012,
loadHTML = 3013,
resetTextProperties = 3014,
setAbsolutePosition = 3015,
removeAbsolutePosition = 3016,
decreaseZIndex = 3017,
increaseZIndex = 3018
};
inline bool operator!(const EditAction& aOp)
{
return aOp == EditAction::none;
}
/** implementation of an editor object. it will be the controller/focal point
* for the main editor services. i.e. the GUIManager, publishing, transaction
* manager, event interfaces. the idea for the event interfaces is to have them
* delegate the actual commands to the editor independent of the XPFE implementation.
*/
class nsEditor : public nsIEditor,
public nsIEditorIMESupport,
public nsSupportsWeakReference,
public nsIPhonetic
{
public:
enum IterDirection
{
kIterForward,
kIterBackward
};
/** The default constructor. This should suffice. the setting of the interfaces is done
* after the construction of the editor class.
*/
nsEditor();
protected:
/** The default destructor. This should suffice. Should this be pure virtual
* for someone to derive from the nsEditor later? I don't believe so.
*/
virtual ~nsEditor();
public:
//Interfaces for addref and release and queryinterface
//NOTE: Use NS_DECL_ISUPPORTS_INHERITED in any class inherited from nsEditor
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsEditor,
nsIEditor)
/* ------------ utility methods -------------- */
already_AddRefed<nsIDOMDocument> GetDOMDocument();
already_AddRefed<nsIDocument> GetDocument();
already_AddRefed<nsIPresShell> GetPresShell();
already_AddRefed<nsIWidget> GetWidget();
enum NotificationForEditorObservers
{
eNotifyEditorObserversOfEnd,
eNotifyEditorObserversOfBefore,
eNotifyEditorObserversOfCancel
};
void NotifyEditorObservers(NotificationForEditorObservers aNotification);
/* ------------ nsIEditor methods -------------- */
NS_DECL_NSIEDITOR
/* ------------ nsIEditorIMESupport methods -------------- */
NS_DECL_NSIEDITORIMESUPPORT
// nsIPhonetic
NS_DECL_NSIPHONETIC
public:
virtual bool IsModifiableNode(nsINode *aNode);
virtual nsresult InsertTextImpl(const nsAString& aStringToInsert,
nsCOMPtr<nsINode>* aInOutNode,
int32_t* aInOutOffset,
nsIDocument* aDoc);
nsresult InsertTextIntoTextNodeImpl(const nsAString& aStringToInsert,
mozilla::dom::Text& aTextNode,
int32_t aOffset,
bool aSuppressIME = false);
NS_IMETHOD DeleteSelectionImpl(EDirection aAction,
EStripWrappers aStripWrappers);
already_AddRefed<mozilla::dom::Element>
DeleteSelectionAndCreateElement(nsIAtom& aTag);
/* helper routines for node/parent manipulations */
nsresult DeleteNode(nsINode* aNode);
nsresult InsertNode(nsIContent& aNode, nsINode& aParent, int32_t aPosition);
enum ECloneAttributes { eDontCloneAttributes, eCloneAttributes };
already_AddRefed<mozilla::dom::Element> ReplaceContainer(
mozilla::dom::Element* aOldContainer,
nsIAtom* aNodeType,
nsIAtom* aAttribute = nullptr,
const nsAString* aValue = nullptr,
ECloneAttributes aCloneAttributes = eDontCloneAttributes);
void CloneAttributes(mozilla::dom::Element* aDest,
mozilla::dom::Element* aSource);
nsresult RemoveContainer(nsIContent* aNode);
already_AddRefed<mozilla::dom::Element> InsertContainerAbove(
nsIContent* aNode,
nsIAtom* aNodeType,
nsIAtom* aAttribute = nullptr,
const nsAString* aValue = nullptr);
nsIContent* SplitNode(nsIContent& aNode, int32_t aOffset,
mozilla::ErrorResult& aResult);
nsresult JoinNodes(nsINode& aLeftNode, nsINode& aRightNode);
nsresult MoveNode(nsIContent* aNode, nsINode* aParent, int32_t aOffset);
/* Method to replace certain CreateElementNS() calls.
Arguments:
nsIAtom* aTag - tag you want
*/
already_AddRefed<mozilla::dom::Element> CreateHTMLContent(nsIAtom* aTag);
// IME event handlers
virtual nsresult BeginIMEComposition(mozilla::WidgetCompositionEvent* aEvent);
virtual nsresult UpdateIMEComposition(nsIDOMEvent* aDOMTextEvent) = 0;
void EndIMEComposition();
void SwitchTextDirectionTo(uint32_t aDirection);
protected:
nsresult DetermineCurrentDirection();
void FireInputEvent();
/** Create a transaction for setting aAttribute to aValue on aElement. Never
* returns null.
*/
already_AddRefed<mozilla::dom::ChangeAttributeTxn>
CreateTxnForSetAttribute(mozilla::dom::Element& aElement,
nsIAtom& aAttribute, const nsAString& aValue);
/** Create a transaction for removing aAttribute on aElement. Never returns
* null.
*/
already_AddRefed<mozilla::dom::ChangeAttributeTxn>
CreateTxnForRemoveAttribute(mozilla::dom::Element& aElement,
nsIAtom& aAttribute);
/** create a transaction for creating a new child node of aParent of type aTag.
*/
already_AddRefed<mozilla::dom::CreateElementTxn>
CreateTxnForCreateElement(nsIAtom& aTag,
nsINode& aParent,
int32_t aPosition);
already_AddRefed<mozilla::dom::Element> CreateNode(nsIAtom* aTag,
nsINode* aParent,
int32_t aPosition);
/** create a transaction for inserting aNode as a child of aParent.
*/
already_AddRefed<mozilla::dom::InsertNodeTxn>
CreateTxnForInsertNode(nsIContent& aNode, nsINode& aParent, int32_t aOffset);
/** create a transaction for removing aNode from its parent.
*/
nsresult CreateTxnForDeleteNode(nsINode* aNode, DeleteNodeTxn** aTxn);
nsresult CreateTxnForDeleteSelection(EDirection aAction,
EditAggregateTxn** aTxn,
nsINode** aNode,
int32_t* aOffset,
int32_t* aLength);
nsresult CreateTxnForDeleteInsertionPoint(nsRange* aRange,
EDirection aAction,
EditAggregateTxn* aTxn,
nsINode** aNode,
int32_t* aOffset,
int32_t* aLength);
/** Create a transaction for inserting aStringToInsert into aTextNode. Never
* returns null.
*/
already_AddRefed<mozilla::dom::InsertTextTxn>
CreateTxnForInsertText(const nsAString& aStringToInsert,
mozilla::dom::Text& aTextNode, int32_t aOffset);
// Never returns null.
already_AddRefed<mozilla::dom::IMETextTxn>
CreateTxnForIMEText(const nsAString & aStringToInsert);
/** create a transaction for adding a style sheet
*/
NS_IMETHOD CreateTxnForAddStyleSheet(mozilla::CSSStyleSheet* aSheet,
AddStyleSheetTxn* *aTxn);
/** create a transaction for removing a style sheet
*/
NS_IMETHOD CreateTxnForRemoveStyleSheet(mozilla::CSSStyleSheet* aSheet,
RemoveStyleSheetTxn* *aTxn);
nsresult DeleteText(nsGenericDOMDataNode& aElement,
uint32_t aOffset, uint32_t aLength);
// NS_IMETHOD DeleteRange(nsIDOMRange *aRange);
already_AddRefed<mozilla::dom::DeleteTextTxn>
CreateTxnForDeleteText(nsGenericDOMDataNode& aElement,
uint32_t aOffset, uint32_t aLength);
already_AddRefed<mozilla::dom::DeleteTextTxn>
CreateTxnForDeleteCharacter(nsGenericDOMDataNode& aData, uint32_t aOffset,
EDirection aDirection);
already_AddRefed<mozilla::dom::SplitNodeTxn>
CreateTxnForSplitNode(nsIContent& aNode, uint32_t aOffset);
already_AddRefed<mozilla::dom::JoinNodeTxn>
CreateTxnForJoinNode(nsINode& aLeftNode, nsINode& aRightNode);
/**
* This method first deletes the selection, if it's not collapsed. Then if
* the selection lies in a CharacterData node, it splits it. If the
* selection is at this point collapsed in a CharacterData node, it's
* adjusted to be collapsed right before or after the node instead (which is
* always possible, since the node was split).
*/
nsresult DeleteSelectionAndPrepareToCreateNode();
// called after a transaction is done successfully
void DoAfterDoTransaction(nsITransaction *aTxn);
// called after a transaction is undone successfully
void DoAfterUndoTransaction();
// called after a transaction is redone successfully
void DoAfterRedoTransaction();
typedef enum {
eDocumentCreated,
eDocumentToBeDestroyed,
eDocumentStateChanged
} TDocumentListenerNotification;
// tell the doc state listeners that the doc state has changed
NS_IMETHOD NotifyDocumentListeners(TDocumentListenerNotification aNotificationType);
/** make the given selection span the entire document */
virtual nsresult SelectEntireDocument(mozilla::dom::Selection* aSelection);
/** helper method for scrolling the selection into view after
* an edit operation. aScrollToAnchor should be true if you
* want to scroll to the point where the selection was started.
* If false, it attempts to scroll the end of the selection into view.
*
* Editor methods *should* call this method instead of the versions
* in the various selection interfaces, since this version makes sure
* that the editor's sync/async settings for reflowing, painting, and
* scrolling match.
*/
NS_IMETHOD ScrollSelectionIntoView(bool aScrollToAnchor);
// Convenience method; forwards to IsBlockNode(nsINode*).
bool IsBlockNode(nsIDOMNode* aNode);
// stub. see comment in source.
virtual bool IsBlockNode(nsINode* aNode);
// helper for GetPriorNode and GetNextNode
nsIContent* FindNextLeafNode(nsINode *aCurrentNode,
bool aGoForward,
bool bNoBlockCrossing);
// install the event listeners for the editor
virtual nsresult InstallEventListeners();
virtual void CreateEventListeners();
// unregister and release our event listeners
virtual void RemoveEventListeners();
/**
* Return true if spellchecking should be enabled for this editor.
*/
bool GetDesiredSpellCheckState();
bool CanEnableSpellCheck()
{
// Check for password/readonly/disabled, which are not spellchecked
// regardless of DOM. Also, check to see if spell check should be skipped or not.
return !IsPasswordEditor() && !IsReadonly() && !IsDisabled() && !ShouldSkipSpellCheck();
}
/**
* EnsureComposition() should be called by composition event handlers. This
* tries to get the composition for the event and set it to mComposition.
*/
void EnsureComposition(mozilla::WidgetCompositionEvent* aCompositionEvent);
nsresult GetSelection(int16_t aSelectionType, nsISelection** aSelection);
public:
/** All editor operations which alter the doc should be prefaced
* with a call to StartOperation, naming the action and direction */
NS_IMETHOD StartOperation(EditAction opID,
nsIEditor::EDirection aDirection);
/** All editor operations which alter the doc should be followed
* with a call to EndOperation */
NS_IMETHOD EndOperation();
/** routines for managing the preservation of selection across
* various editor actions */
bool ArePreservingSelection();
void PreserveSelectionAcrossActions(mozilla::dom::Selection* aSel);
nsresult RestorePreservedSelection(mozilla::dom::Selection* aSel);
void StopPreservingSelection();
/**
* SplitNode() creates a new node identical to an existing node, and split
* the contents between the two nodes
* @param aExistingRightNode The node to split. It will become the new
* node's next sibling.
* @param aOffset The offset of aExistingRightNode's
* content|children to do the split at
* @param aNewLeftNode The new node resulting from the split, becomes
* aExistingRightNode's previous sibling.
*/
nsresult SplitNodeImpl(nsIContent& aExistingRightNode,
int32_t aOffset,
nsIContent& aNewLeftNode);
/**
* JoinNodes() takes 2 nodes and merge their content|children.
* @param aNodeToKeep The node that will remain after the join.
* @param aNodeToJoin The node that will be joined with aNodeToKeep.
* There is no requirement that the two nodes be of the same type.
* @param aParent The parent of aNodeToKeep
*/
nsresult JoinNodesImpl(nsINode* aNodeToKeep,
nsINode* aNodeToJoin,
nsINode* aParent);
/**
* Return the offset of aChild in aParent. Asserts fatally if parent or
* child is null, or parent is not child's parent.
*/
static int32_t GetChildOffset(nsIDOMNode *aChild,
nsIDOMNode *aParent);
/**
* Set outOffset to the offset of aChild in the parent.
* Returns the parent of aChild.
*/
static already_AddRefed<nsIDOMNode> GetNodeLocation(nsIDOMNode* aChild,
int32_t* outOffset);
static nsINode* GetNodeLocation(nsINode* aChild, int32_t* aOffset);
/** returns the number of things inside aNode in the out-param aCount.
* @param aNode is the node to get the length of.
* If aNode is text, returns number of characters.
* If not, returns number of children nodes.
* @param aCount [OUT] the result of the above calculation.
*/
static nsresult GetLengthOfDOMNode(nsIDOMNode *aNode, uint32_t &aCount);
/** get the node immediately prior to aCurrentNode
* @param aCurrentNode the node from which we start the search
* @param aEditableNode if true, only return an editable node
* @param aResultNode [OUT] the node that occurs before aCurrentNode in the tree,
* skipping non-editable nodes if aEditableNode is true.
* If there is no prior node, aResultNode will be nullptr.
* @param bNoBlockCrossing If true, don't move across "block" nodes, whatever that means.
*/
nsIContent* GetPriorNode(nsINode* aCurrentNode, bool aEditableNode,
bool aNoBlockCrossing = false);
// and another version that takes a {parent,offset} pair rather than a node
nsIContent* GetPriorNode(nsINode* aParentNode,
int32_t aOffset,
bool aEditableNode,
bool aNoBlockCrossing = false);
/** get the node immediately after to aCurrentNode
* @param aCurrentNode the node from which we start the search
* @param aEditableNode if true, only return an editable node
* @param aResultNode [OUT] the node that occurs after aCurrentNode in the tree,
* skipping non-editable nodes if aEditableNode is true.
* If there is no prior node, aResultNode will be nullptr.
*/
nsIContent* GetNextNode(nsINode* aCurrentNode,
bool aEditableNode,
bool bNoBlockCrossing = false);
// and another version that takes a {parent,offset} pair rather than a node
nsIContent* GetNextNode(nsINode* aParentNode,
int32_t aOffset,
bool aEditableNode,
bool aNoBlockCrossing = false);
// Helper for GetNextNode and GetPriorNode
nsIContent* FindNode(nsINode *aCurrentNode,
bool aGoForward,
bool aEditableNode,
bool bNoBlockCrossing);
/**
* Get the rightmost child of aCurrentNode;
* return nullptr if aCurrentNode has no children.
*/
nsIContent* GetRightmostChild(nsINode *aCurrentNode,
bool bNoBlockCrossing = false);
/**
* Get the leftmost child of aCurrentNode;
* return nullptr if aCurrentNode has no children.
*/
nsIContent* GetLeftmostChild(nsINode *aCurrentNode,
bool bNoBlockCrossing = false);
/** returns true if aNode is of the type implied by aTag */
static inline bool NodeIsType(nsIDOMNode *aNode, nsIAtom *aTag)
{
return GetTag(aNode) == aTag;
}
/** returns true if aParent can contain a child of type aTag */
bool CanContain(nsINode& aParent, nsIContent& aChild);
bool CanContainTag(nsINode& aParent, nsIAtom& aTag);
bool TagCanContain(nsIAtom& aParentTag, nsIContent& aChild);
virtual bool TagCanContainTag(nsIAtom& aParentTag, nsIAtom& aChildTag);
/** returns true if aNode is our root node */
bool IsRoot(nsIDOMNode* inNode);
bool IsRoot(nsINode* inNode);
bool IsEditorRoot(nsINode* aNode);
/** returns true if aNode is a descendant of our root node */
bool IsDescendantOfRoot(nsIDOMNode* inNode);
bool IsDescendantOfRoot(nsINode* inNode);
bool IsDescendantOfEditorRoot(nsIDOMNode* aNode);
bool IsDescendantOfEditorRoot(nsINode* aNode);
/** returns true if aNode is a container */
virtual bool IsContainer(nsINode* aNode);
virtual bool IsContainer(nsIDOMNode* aNode);
/** returns true if aNode is an editable node */
bool IsEditable(nsIDOMNode *aNode);
virtual bool IsEditable(nsINode* aNode);
/** returns true if aNode is a MozEditorBogus node */
bool IsMozEditorBogusNode(nsINode* aNode)
{
return aNode && aNode->IsElement() &&
aNode->AsElement()->AttrValueIs(kNameSpaceID_None,
kMOZEditorBogusNodeAttrAtom, kMOZEditorBogusNodeValue,
eCaseMatters);
}
/** counts number of editable child nodes */
uint32_t CountEditableChildren(nsINode* aNode);
/** Find the deep first and last children. */
nsINode* GetFirstEditableNode(nsINode* aRoot);
/**
* Returns current composition.
*/
mozilla::TextComposition* GetComposition() const;
/**
* Returns true if there is composition string and not fixed.
*/
bool IsIMEComposing() const;
/**
* Returns true when inserting text should be a part of current composition.
*/
bool ShouldHandleIMEComposition() const;
/** from html rules code - migration in progress */
static nsresult GetTagString(nsIDOMNode *aNode, nsAString& outString);
static nsIAtom *GetTag(nsIDOMNode *aNode);
bool NodesSameType(nsIDOMNode *aNode1, nsIDOMNode *aNode2);
virtual bool AreNodesSameType(nsIContent* aNode1, nsIContent* aNode2);
static bool IsTextNode(nsIDOMNode *aNode);
static bool IsTextNode(nsINode* aNode)
{
return aNode->NodeType() == nsIDOMNode::TEXT_NODE;
}
static nsCOMPtr<nsIDOMNode> GetChildAt(nsIDOMNode *aParent, int32_t aOffset);
static nsCOMPtr<nsIDOMNode> GetNodeAtRangeOffsetPoint(nsIDOMNode* aParentOrNode, int32_t aOffset);
static nsresult GetStartNodeAndOffset(mozilla::dom::Selection* aSelection,
nsIDOMNode** outStartNode,
int32_t* outStartOffset);
static nsresult GetStartNodeAndOffset(mozilla::dom::Selection* aSelection,
nsINode** aStartNode,
int32_t* aStartOffset);
static nsresult GetEndNodeAndOffset(mozilla::dom::Selection* aSelection,
nsIDOMNode** outEndNode,
int32_t* outEndOffset);
static nsresult GetEndNodeAndOffset(mozilla::dom::Selection* aSelection,
nsINode** aEndNode,
int32_t* aEndOffset);
#if DEBUG_JOE
static void DumpNode(nsIDOMNode *aNode, int32_t indent=0);
#endif
mozilla::dom::Selection* GetSelection(int16_t aSelectionType =
nsISelectionController::SELECTION_NORMAL);
// Helpers to add a node to the selection.
// Used by table cell selection methods
nsresult CreateRange(nsIDOMNode *aStartParent, int32_t aStartOffset,
nsIDOMNode *aEndParent, int32_t aEndOffset,
nsRange** aRange);
// Creates a range with just the supplied node and appends that to the selection
nsresult AppendNodeToSelectionAsRange(nsIDOMNode *aNode);
// When you are using AppendNodeToSelectionAsRange, call this first to start a new selection
nsresult ClearSelection();
nsresult IsPreformatted(nsIDOMNode *aNode, bool *aResult);
enum class EmptyContainers { no, yes };
int32_t SplitNodeDeep(nsIContent& aNode, nsIContent& aSplitPointParent,
int32_t aSplitPointOffset,
EmptyContainers aEmptyContainers =
EmptyContainers::yes,
nsIContent** outLeftNode = nullptr,
nsIContent** outRightNode = nullptr);
::DOMPoint JoinNodeDeep(nsIContent& aLeftNode, nsIContent& aRightNode);
nsresult GetString(const nsAString& name, nsAString& value);
void BeginUpdateViewBatch(void);
virtual nsresult EndUpdateViewBatch(void);
bool GetShouldTxnSetSelection();
virtual nsresult HandleKeyPressEvent(nsIDOMKeyEvent* aKeyEvent);
nsresult HandleInlineSpellCheck(EditAction action,
mozilla::dom::Selection* aSelection,
nsIDOMNode *previousSelectedNode,
int32_t previousSelectedOffset,
nsIDOMNode *aStartNode,
int32_t aStartOffset,
nsIDOMNode *aEndNode,
int32_t aEndOffset);
virtual already_AddRefed<mozilla::dom::EventTarget> GetDOMEventTarget() = 0;
// Fast non-refcounting editor root element accessor
mozilla::dom::Element *GetRoot()
{
if (!mRootElement) {
// Let GetRootElement() do the work
nsCOMPtr<nsIDOMElement> root;
GetRootElement(getter_AddRefs(root));
}
return mRootElement;
}
// Likewise, but gets the editor's root instead, which is different for HTML
// editors
virtual mozilla::dom::Element* GetEditorRoot();
// Likewise, but gets the text control element instead of the root for
// plaintext editors
mozilla::dom::Element* GetExposedRoot();
// Accessor methods to flags
bool IsPlaintextEditor() const
{
return (mFlags & nsIPlaintextEditor::eEditorPlaintextMask) != 0;
}
bool IsSingleLineEditor() const
{
return (mFlags & nsIPlaintextEditor::eEditorSingleLineMask) != 0;
}
bool IsPasswordEditor() const
{
return (mFlags & nsIPlaintextEditor::eEditorPasswordMask) != 0;
}
bool IsReadonly() const
{
return (mFlags & nsIPlaintextEditor::eEditorReadonlyMask) != 0;
}
bool IsDisabled() const
{
return (mFlags & nsIPlaintextEditor::eEditorDisabledMask) != 0;
}
bool IsInputFiltered() const
{
return (mFlags & nsIPlaintextEditor::eEditorFilterInputMask) != 0;
}
bool IsMailEditor() const
{
return (mFlags & nsIPlaintextEditor::eEditorMailMask) != 0;
}
bool IsWrapHackEnabled() const
{
return (mFlags & nsIPlaintextEditor::eEditorEnableWrapHackMask) != 0;
}
bool IsFormWidget() const
{
return (mFlags & nsIPlaintextEditor::eEditorWidgetMask) != 0;
}
bool NoCSS() const
{
return (mFlags & nsIPlaintextEditor::eEditorNoCSSMask) != 0;
}
bool IsInteractionAllowed() const
{
return (mFlags & nsIPlaintextEditor::eEditorAllowInteraction) != 0;
}
bool DontEchoPassword() const
{
return (mFlags & nsIPlaintextEditor::eEditorDontEchoPassword) != 0;
}
bool ShouldSkipSpellCheck() const
{
return (mFlags & nsIPlaintextEditor::eEditorSkipSpellCheck) != 0;
}
bool IsTabbable() const
{
return IsSingleLineEditor() || IsPasswordEditor() || IsFormWidget() ||
IsInteractionAllowed();
}
bool HasIndependentSelection() const
{
return !!mSelConWeak;
}
// Get the input event target. This might return null.
virtual already_AddRefed<nsIContent> GetInputEventTargetContent() = 0;
// Get the focused content, if we're focused. Returns null otherwise.
virtual already_AddRefed<nsIContent> GetFocusedContent();
// Get the focused content for the argument of some IMEStateManager's
// methods.
virtual already_AddRefed<nsIContent> GetFocusedContentForIME();
// Whether the editor is active on the DOM window. Note that when this
// returns true but GetFocusedContent() returns null, it means that this editor was
// focused when the DOM window was active.
virtual bool IsActiveInDOMWindow();
// Whether the aEvent should be handled by this editor or not. When this
// returns FALSE, The aEvent shouldn't be handled on this editor,
// i.e., The aEvent should be handled by another inner editor or ancestor
// elements.
virtual bool IsAcceptableInputEvent(nsIDOMEvent* aEvent);
// FindSelectionRoot() returns a selection root of this editor when aNode
// gets focus. aNode must be a content node or a document node. When the
// target isn't a part of this editor, returns nullptr. If this is for
// designMode, you should set the document node to aNode except that an
// element in the document has focus.
virtual already_AddRefed<nsIContent> FindSelectionRoot(nsINode* aNode);
// Initializes selection and caret for the editor. If aEventTarget isn't
// a host of the editor, i.e., the editor doesn't get focus, this does
// nothing.
nsresult InitializeSelection(nsIDOMEventTarget* aFocusEventTarget);
// This method has to be called by nsEditorEventListener::Focus.
// All actions that have to be done when the editor is focused needs to be
// added here.
void OnFocus(nsIDOMEventTarget* aFocusEventTarget);
// Used to insert content from a data transfer into the editable area.
// This is called for each item in the data transfer, with the index of
// each item passed as aIndex.
virtual nsresult InsertFromDataTransfer(mozilla::dom::DataTransfer *aDataTransfer,
int32_t aIndex,
nsIDOMDocument *aSourceDoc,
nsIDOMNode *aDestinationNode,
int32_t aDestOffset,
bool aDoDeleteSelection) = 0;
virtual nsresult InsertFromDrop(nsIDOMEvent* aDropEvent) = 0;
virtual already_AddRefed<nsIDOMNode> FindUserSelectAllNode(nsIDOMNode* aNode) { return nullptr; }
/**
* GetIMESelectionStartOffsetIn() returns the start offset of IME selection in
* the aTextNode. If there is no IME selection, returns -1.
*/
int32_t GetIMESelectionStartOffsetIn(nsINode* aTextNode);
/**
* FindBetterInsertionPoint() tries to look for better insertion point which
* is typically the nearest text node and offset in it.
*/
void FindBetterInsertionPoint(nsCOMPtr<nsINode>& aNode,
int32_t& aOffset);
/**
* HideCaret() hides caret with nsCaret::AddForceHide() or may show carent
* with nsCaret::RemoveForceHide(). This does NOT set visibility of
* nsCaret. Therefore, this is stateless.
*/
void HideCaret(bool aHide);
protected:
enum Tristate {
eTriUnset,
eTriFalse,
eTriTrue
};
// Spellchecking
nsCString mContentMIMEType; // MIME type of the doc we are editing.
nsCOMPtr<nsIInlineSpellChecker> mInlineSpellChecker;
RefPtr<nsTransactionManager> mTxnMgr;
nsCOMPtr<mozilla::dom::Element> mRootElement; // cached root node
RefPtr<mozilla::dom::Text> mIMETextNode; // current IME text node
nsCOMPtr<mozilla::dom::EventTarget> mEventTarget; // The form field as an event receiver
nsCOMPtr<nsIDOMEventListener> mEventListener;
nsWeakPtr mSelConWeak; // weak reference to the nsISelectionController
nsWeakPtr mPlaceHolderTxn; // weak reference to placeholder for begin/end batch purposes
nsWeakPtr mDocWeak; // weak reference to the nsIDOMDocument
nsIAtom *mPlaceHolderName; // name of placeholder transaction
nsSelectionState *mSelState; // saved selection state for placeholder txn batching
nsString *mPhonetic;
// IME composition this is not null between compositionstart and
// compositionend.
RefPtr<mozilla::TextComposition> mComposition;
// various listeners
// Listens to all low level actions on the doc
nsTArray<mozilla::OwningNonNull<nsIEditActionListener>> mActionListeners;
// Just notify once per high level change
nsTArray<mozilla::OwningNonNull<nsIEditorObserver>> mEditorObservers;
// Listen to overall doc state (dirty or not, just created, etc)
nsTArray<mozilla::OwningNonNull<nsIDocumentStateListener>> mDocStateListeners;
nsSelectionState mSavedSel; // cached selection for nsAutoSelectionReset
nsRangeUpdater mRangeUpdater; // utility class object for maintaining preserved ranges
uint32_t mModCount; // number of modifications (for undo/redo stack)
uint32_t mFlags; // behavior flags. See nsIPlaintextEditor.idl for the flags we use.
int32_t mUpdateCount;
int32_t mPlaceHolderBatch; // nesting count for batching
EditAction mAction; // the current editor action
uint32_t mIMETextOffset; // offset in text node where IME comp string begins
// The Length of the composition string or commit string. If this is length
// of commit string, the length is truncated by maxlength attribute.
uint32_t mIMETextLength;
EDirection mDirection; // the current direction of editor action
int8_t mDocDirtyState; // -1 = not initialized
uint8_t mSpellcheckCheckboxState; // a Tristate value
bool mShouldTxnSetSelection; // turn off for conservative selection adjustment by txns
bool mDidPreDestroy; // whether PreDestroy has been called
bool mDidPostCreate; // whether PostCreate has been called
bool mDispatchInputEvent;
bool mIsInEditAction; // true while the instance is handling an edit action
bool mHidingCaret; // whether caret is hidden forcibly.
bool mSpellCheckerDictionaryUpdated; // Whether spellchecker dictionary is initialized after focused.
friend bool NSCanUnload(nsISupports* serviceMgr);
friend class nsAutoTxnsConserveSelection;
friend class nsAutoSelectionReset;
friend class nsAutoRules;
friend class nsRangeUpdater;
};
#endif
Reference in New Issue View Git Blame Copy Permalink