gecko/editor/libeditor/text/nsPlaintextEditor.h
2012-06-10 19:44:50 -04:00

209 lines
7.5 KiB
C++

/* -*- 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 nsPlaintextEditor_h__
#define nsPlaintextEditor_h__
#include "nsCOMPtr.h"
#include "nsIPlaintextEditor.h"
#include "nsIEditorMailSupport.h"
#include "nsEditor.h"
#include "nsIDOMElement.h"
#include "nsIDOMEventListener.h"
#include "nsEditRules.h"
#include "nsCycleCollectionParticipant.h"
class nsITransferable;
class nsIDocumentEncoder;
/**
* The text editor implementation.
* Use to edit text document represented as a DOM tree.
*/
class nsPlaintextEditor : public nsEditor,
public nsIPlaintextEditor,
public nsIEditorMailSupport
{
public:
// Interfaces for addref and release and queryinterface
// NOTE macro used is for classes that inherit from
// another class. Only the base class should use NS_DECL_ISUPPORTS
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsPlaintextEditor, nsEditor)
/* below used by TypedText() */
enum ETypingAction {
eTypedText, /* user typed text */
eTypedBR, /* user typed shift-enter to get a br */
eTypedBreak /* user typed enter */
};
nsPlaintextEditor();
virtual ~nsPlaintextEditor();
/* ------------ nsIPlaintextEditor methods -------------- */
NS_DECL_NSIPLAINTEXTEDITOR
/* ------------ nsIEditorMailSupport overrides -------------- */
NS_DECL_NSIEDITORMAILSUPPORT
/* ------------ Overrides of nsEditor interface methods -------------- */
NS_IMETHOD SetAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
const nsAString & aValue,
bool aSuppressTransaction);
NS_IMETHOD RemoveAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
bool aSuppressTransaction);
/** prepare the editor for use */
NS_IMETHOD Init(nsIDOMDocument *aDoc, nsIContent *aRoot, nsISelectionController *aSelCon, PRUint32 aFlags);
NS_IMETHOD GetDocumentIsEmpty(bool *aDocumentIsEmpty);
NS_IMETHOD GetIsDocumentEditable(bool *aIsDocumentEditable);
NS_IMETHOD DeleteSelection(EDirection aAction,
EStripWrappers aStripWrappers);
NS_IMETHOD SetDocumentCharacterSet(const nsACString & characterSet);
NS_IMETHOD Undo(PRUint32 aCount);
NS_IMETHOD Redo(PRUint32 aCount);
NS_IMETHOD Cut();
NS_IMETHOD CanCut(bool *aCanCut);
NS_IMETHOD Copy();
NS_IMETHOD CanCopy(bool *aCanCopy);
NS_IMETHOD Paste(PRInt32 aSelectionType);
NS_IMETHOD CanPaste(PRInt32 aSelectionType, bool *aCanPaste);
NS_IMETHOD PasteTransferable(nsITransferable *aTransferable);
NS_IMETHOD CanPasteTransferable(nsITransferable *aTransferable, bool *aCanPaste);
NS_IMETHOD OutputToString(const nsAString& aFormatType,
PRUint32 aFlags,
nsAString& aOutputString);
NS_IMETHOD OutputToStream(nsIOutputStream* aOutputStream,
const nsAString& aFormatType,
const nsACString& aCharsetOverride,
PRUint32 aFlags);
/** All editor operations which alter the doc should be prefaced
* with a call to StartOperation, naming the action and direction */
NS_IMETHOD StartOperation(OperationID opID,
nsIEditor::EDirection aDirection);
/** All editor operations which alter the doc should be followed
* with a call to EndOperation */
NS_IMETHOD EndOperation();
/** make the given selection span the entire document */
NS_IMETHOD SelectEntireDocument(nsISelection *aSelection);
virtual nsresult HandleKeyPressEvent(nsIDOMKeyEvent* aKeyEvent);
virtual already_AddRefed<nsIDOMEventTarget> GetDOMEventTarget();
virtual nsresult BeginIMEComposition();
virtual nsresult UpdateIMEComposition(const nsAString &aCompositionString,
nsIPrivateTextRangeList *aTextRange);
virtual already_AddRefed<nsIContent> GetInputEventTargetContent();
/* ------------ Utility Routines, not part of public API -------------- */
NS_IMETHOD TypedText(const nsAString& aString, ETypingAction aAction);
nsresult InsertTextAt(const nsAString &aStringToInsert,
nsIDOMNode *aDestinationNode,
PRInt32 aDestOffset,
bool aDoDeleteSelection);
virtual nsresult InsertFromDataTransfer(nsIDOMDataTransfer *aDataTransfer,
PRInt32 aIndex,
nsIDOMDocument *aSourceDoc,
nsIDOMNode *aDestinationNode,
PRInt32 aDestOffset,
bool aDoDeleteSelection);
virtual nsresult InsertFromDrop(nsIDOMEvent* aDropEvent);
/**
* Extends the selection for given deletion operation
* If done, also update aAction to what's actually left to do after the
* extension.
*/
nsresult ExtendSelectionForDelete(nsISelection* aSelection,
nsIEditor::EDirection *aAction);
static void GetDefaultEditorPrefs(PRInt32 &aNewLineHandling,
PRInt32 &aCaretStyle);
protected:
NS_IMETHOD InitRules();
void BeginEditorInit();
nsresult EndEditorInit();
// Helpers for output routines
NS_IMETHOD GetAndInitDocEncoder(const nsAString& aFormatType,
PRUint32 aFlags,
const nsACString& aCharset,
nsIDocumentEncoder** encoder);
// key event helpers
NS_IMETHOD CreateBR(nsIDOMNode *aNode, PRInt32 aOffset,
nsCOMPtr<nsIDOMNode> *outBRNode, EDirection aSelect = eNone);
nsresult CreateBRImpl(nsCOMPtr<nsIDOMNode>* aInOutParent,
PRInt32* aInOutOffset,
nsCOMPtr<nsIDOMNode>* outBRNode,
EDirection aSelect);
nsresult InsertBR(nsCOMPtr<nsIDOMNode>* outBRNode);
// factored methods for handling insertion of data from transferables (drag&drop or clipboard)
NS_IMETHOD PrepareTransferable(nsITransferable **transferable);
NS_IMETHOD InsertTextFromTransferable(nsITransferable *transferable,
nsIDOMNode *aDestinationNode,
PRInt32 aDestOffset,
bool aDoDeleteSelection);
/** shared outputstring; returns whether selection is collapsed and resulting string */
nsresult SharedOutputString(PRUint32 aFlags, bool* aIsCollapsed, nsAString& aResult);
/* small utility routine to test the eEditorReadonly bit */
bool IsModifiable();
bool CanCutOrCopy();
bool FireClipboardEvent(PRInt32 aType);
bool UpdateMetaCharset(nsIDOMDocument* aDocument,
const nsACString& aCharacterSet);
// Data members
protected:
nsCOMPtr<nsIEditRules> mRules;
bool mWrapToWindow;
PRInt32 mWrapColumn;
PRInt32 mMaxTextLength;
PRInt32 mInitTriggerCounter;
PRInt32 mNewlineHandling;
PRInt32 mCaretStyle;
// friends
friend class nsHTMLEditRules;
friend class nsTextEditRules;
friend class nsAutoEditInitRulesTrigger;
};
#endif //nsPlaintextEditor_h__