/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsTextEditRules_h__
#define nsTextEditRules_h__
#include "nsCOMPtr.h"
#include "nsHTMLEditor.h"
#include "nsIDOMNode.h"
#include "nsEditRules.h"
/** Object that encapsulates HTML text-specific editing rules.
*
* To be a good citizen, edit rules must live by these restrictions:
* 1. All data manipulation is through the editor.
* Content nodes in the document tree must not be manipulated directly.
* Content nodes in document fragments that are not part of the document itself
* may be manipulated at will. Operations on document fragments must not
* go through the editor.
* 2. Selection must not be explicitly set by the rule method.
* Any manipulation of Selection must be done by the editor.
*/
class nsTextEditRules : public nsIEditRules
{
public:
NS_DECL_ISUPPORTS
nsTextEditRules();
virtual ~nsTextEditRules();
// nsIEditRules methods
NS_IMETHOD Init(nsHTMLEditor *aEditor, PRUint32 aFlags);
NS_IMETHOD BeforeEdit(PRInt32 action, nsIEditor::EDirection aDirection);
NS_IMETHOD AfterEdit(PRInt32 action, nsIEditor::EDirection aDirection);
NS_IMETHOD WillDoAction(nsIDOMSelection *aSelection, nsRulesInfo *aInfo, PRBool *aCancel, PRBool *aHandled);
NS_IMETHOD DidDoAction(nsIDOMSelection *aSelection, nsRulesInfo *aInfo, nsresult aResult);
NS_IMETHOD GetFlags(PRUint32 *aFlags);
NS_IMETHOD SetFlags(PRUint32 aFlags);
NS_IMETHOD DocumentIsEmpty(PRBool *aDocumentIsEmpty);
// nsTextEditRules action id's
enum
{
kDefault = 0,
// any editor that has a txn mgr
kUndo = 1000,
kRedo = 1001,
// text actions
kInsertText = 2000,
kInsertTextIME = 2001,
kDeleteSelection = 2002,
kSetTextProperty = 2003,
kRemoveTextProperty = 2004,
kOutputText = 2005,
// html only action
kInsertBreak = 3000,
kMakeList = 3001,
kIndent = 3002,
kOutdent = 3003,
kAlign = 3004,
kMakeBasicBlock = 3005,
kRemoveList = 3006,
kInsertElement = 3008
};
protected:
// nsTextEditRules implementation methods
nsresult WillInsertText( PRInt32 aAction,
nsIDOMSelection *aSelection,
PRBool *aCancel,
PRBool *aHandled,
const nsString *inString,
nsString *outString,
PRInt32 aMaxLength);
nsresult DidInsertText(nsIDOMSelection *aSelection, nsresult aResult);
nsresult GetTopEnclosingPre(nsIDOMNode *aNode, nsIDOMNode** aOutPreNode);
nsresult WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled);
nsresult DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult);
nsresult WillInsert(nsIDOMSelection *aSelection, PRBool *aCancel);
nsresult DidInsert(nsIDOMSelection *aSelection, nsresult aResult);
nsresult WillDeleteSelection(nsIDOMSelection *aSelection,
nsIEditor::EDirection aCollapsedAction,
PRBool *aCancel,
PRBool *aHandled);
nsresult DidDeleteSelection(nsIDOMSelection *aSelection,
nsIEditor::EDirection aCollapsedAction,
nsresult aResult);
nsresult WillSetTextProperty(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled);
nsresult DidSetTextProperty(nsIDOMSelection *aSelection, nsresult aResult);
nsresult WillRemoveTextProperty(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled);
nsresult DidRemoveTextProperty(nsIDOMSelection *aSelection, nsresult aResult);
nsresult WillUndo(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled);
nsresult DidUndo(nsIDOMSelection *aSelection, nsresult aResult);
nsresult WillRedo(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled);
nsresult DidRedo(nsIDOMSelection *aSelection, nsresult aResult);
/** called prior to nsIEditor::OutputToString
* @param aSelection
* @param aInFormat the format requested for the output, a MIME type
* @param aOutText the string to use for output, if aCancel is set to true
* @param aOutCancel if set to PR_TRUE, the caller should cancel the operation
* and use aOutText as the result.
*/
nsresult WillOutputText(nsIDOMSelection *aSelection,
const nsString *aInFormat,
nsString *aOutText,
PRBool *aOutCancel,
PRBool *aHandled);
nsresult DidOutputText(nsIDOMSelection *aSelection, nsresult aResult);
// helper functions
/** replaces newllines with breaks, if needed. acts on doc portion in aRange */
nsresult ReplaceNewlines(nsIDOMRange *aRange);
/** creates a bogus text node if the document has no editable content */
nsresult CreateBogusNodeIfNeeded(nsIDOMSelection *aSelection);
/** returns a truncated insertion string if insertion would place us
over aMaxLength */
nsresult TruncateInsertionIfNeeded(nsIDOMSelection *aSelection,
const nsString *aInString,
nsString *aOutString,
PRInt32 aMaxLength);
/** Echo's the insertion text into the password buffer, and converts
insertion text to '*'s */
nsresult EchoInsertionToPWBuff(PRInt32 aStart, PRInt32 aEnd, nsString *aOutString);
nsresult CreateMozBR(nsIDOMNode *inParent, PRInt32 inOffset, nsCOMPtr *outBRNode);
// data members
nsHTMLEditor *mEditor; // note that we do not refcount the editor
nsString mPasswordText; // a buffer we use to store the real value of password editors
nsCOMPtr mBogusNode; // magic node acts as placeholder in empty doc
PRUint32 mFlags;
PRUint32 mActionNesting;
PRBool mLockRulesSniffing;
PRInt32 mTheAction; // the top level editor action
// friends
friend class nsAutoLockRulesSniffing;
};
class nsTextRulesInfo : public nsRulesInfo
{
public:
nsTextRulesInfo(int aAction) :
nsRulesInfo(aAction),
inString(0),
outString(0),
outputFormat(0),
maxLength(-1),
collapsedAction(nsIEditor::eNext),
bOrdered(PR_FALSE),
alignType(0),
blockType(0),
insertElement(0)
{};
virtual ~nsTextRulesInfo() {};
// kInsertText
const nsString *inString;
nsString *outString;
const nsString *outputFormat;
PRInt32 maxLength;
// kDeleteSelection
nsIEditor::EDirection collapsedAction;
// kMakeList
PRBool bOrdered;
// kAlign
const nsString *alignType;
// kMakeBasicBlock
const nsString *blockType;
// kInsertElement
const nsIDOMElement* insertElement;
};
/***************************************************************************
* stack based helper class for StartOperation()/EndOperation() sandwich.
* this class sets a bool letting us know to ignore any rules sniffing
* that tries to occur reentrantly.
*/
class nsAutoLockRulesSniffing
{
public:
nsAutoLockRulesSniffing(nsTextEditRules *rules) : mRules(rules)
{if (mRules) mRules->mLockRulesSniffing = PR_TRUE;}
~nsAutoLockRulesSniffing()
{if (mRules) mRules->mLockRulesSniffing = PR_FALSE;}
protected:
nsTextEditRules *mRules;
};
/***************************************************************************
* stack based helper class for turning on/off the edit listener.
*/
class nsAutoLockListener
{
public:
nsAutoLockListener(PRBool *enabled) : mEnabled(enabled)
{if (mEnabled) { mOldState=*mEnabled; *mEnabled = PR_FALSE;}}
~nsAutoLockListener()
{if (mEnabled) *mEnabled = mOldState;}
protected:
PRBool *mEnabled;
PRBool mOldState;
};
nsresult NS_NewTextEditRules(nsIEditRules** aInstancePtrResult);
#endif //nsTextEditRules_h__