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