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353 lines
13 KiB
C++
353 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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 "nsPlaintextEditor.h"
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#include "nsIDOMNode.h"
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#include "nsEditRules.h"
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#include "nsITimer.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, public nsITimerCallback
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{
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public:
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NS_DECL_NSITIMERCALLBACK
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsTextEditRules, nsIEditRules)
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nsTextEditRules();
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virtual ~nsTextEditRules();
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// nsIEditRules methods
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NS_IMETHOD Init(nsPlaintextEditor *aEditor, PRUint32 aFlags);
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NS_IMETHOD DetachEditor();
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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(nsISelection *aSelection, nsRulesInfo *aInfo, PRBool *aCancel, PRBool *aHandled);
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NS_IMETHOD DidDoAction(nsISelection *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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kMakeDefListItem = 3007,
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kInsertElement = 3008,
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kLoadHTML = 3013,
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kSetAbsolutePosition = 3015,
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kRemoveAbsolutePosition = 3016,
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kDecreaseZIndex = 3017,
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kIncreaseZIndex = 3018
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};
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public:
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nsresult ResetIMETextPWBuf();
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/**
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* Handles the newline characters either according to aNewLineHandling
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* or to the default system prefs if aNewLineHandling is negative.
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*
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* @param aString the string to be modified in place.
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* @param aNewLineHandling determine the desired type of newline handling:
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* * negative values:
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* handle newlines according to platform defaults.
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* * nsIPlaintextEditor::eNewlinesReplaceWithSpaces:
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* replace newlines with spaces.
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* * nsIPlaintextEditor::eNewlinesStrip:
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* remove newlines from the string.
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* * nsIPlaintextEditor::eNewlinesReplaceWithCommas:
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* replace newlines with commas.
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* * nsIPlaintextEditor::eNewlinesStripSurroundingWhitespace:
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* collapse newlines and surrounding whitespace characters and
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* remove them from the string.
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* * nsIPlaintextEditor::eNewlinesPasteIntact:
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* only remove the leading and trailing newlines.
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* * nsIPlaintextEditor::eNewlinesPasteToFirst or any other value:
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* remove the first newline and all characters following it.
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*/
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static void HandleNewLines(nsString &aString, PRInt32 aNewLineHandling);
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/**
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* Prepare a string buffer for being displayed as the contents of a password
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* field. This function uses the platform-specific character for representing
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* characters entered into password fields.
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*
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* @param aOutString the output string. When this function returns,
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* aOutString will contain aLength password characters.
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* @param aLength the number of password characters that aOutString should
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* contain.
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*/
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static nsresult FillBufWithPWChars(nsAString *aOutString, PRInt32 aLength);
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protected:
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// nsTextEditRules implementation methods
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nsresult WillInsertText( PRInt32 aAction,
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nsISelection *aSelection,
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PRBool *aCancel,
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PRBool *aHandled,
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const nsAString *inString,
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nsAString *outString,
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PRInt32 aMaxLength);
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nsresult DidInsertText(nsISelection *aSelection, nsresult aResult);
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nsresult GetTopEnclosingPre(nsIDOMNode *aNode, nsIDOMNode** aOutPreNode);
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nsresult WillInsertBreak(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled);
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nsresult DidInsertBreak(nsISelection *aSelection, nsresult aResult);
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nsresult WillInsert(nsISelection *aSelection, PRBool *aCancel);
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nsresult DidInsert(nsISelection *aSelection, nsresult aResult);
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nsresult WillDeleteSelection(nsISelection *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(nsISelection *aSelection,
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nsIEditor::EDirection aCollapsedAction,
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nsresult aResult);
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nsresult WillSetTextProperty(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled);
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nsresult DidSetTextProperty(nsISelection *aSelection, nsresult aResult);
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nsresult WillRemoveTextProperty(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled);
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nsresult DidRemoveTextProperty(nsISelection *aSelection, nsresult aResult);
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nsresult WillUndo(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled);
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nsresult DidUndo(nsISelection *aSelection, nsresult aResult);
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nsresult WillRedo(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled);
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nsresult DidRedo(nsISelection *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(nsISelection *aSelection,
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const nsAString *aInFormat,
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nsAString *aOutText,
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PRBool *aOutCancel,
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PRBool *aHandled);
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nsresult DidOutputText(nsISelection *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 trailing break in the text doc if there is not one already */
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nsresult CreateTrailingBRIfNeeded();
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/** creates a bogus text node if the document has no editable content */
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nsresult CreateBogusNodeIfNeeded(nsISelection *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(nsISelection *aSelection,
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const nsAString *aInString,
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nsAString *aOutString,
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PRInt32 aMaxLength);
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/** Remove IME composition text from password buffer */
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nsresult RemoveIMETextFromPWBuf(PRUint32 &aStart, nsAString *aIMEString);
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nsresult CreateMozBR(nsIDOMNode *inParent, PRInt32 inOffset, nsCOMPtr<nsIDOMNode> *outBRNode);
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nsresult CheckBidiLevelForDeletion(nsISelection *aSelection,
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nsIDOMNode *aSelNode,
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PRInt32 aSelOffset,
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nsIEditor::EDirection aAction,
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PRBool *aCancel);
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nsresult HideLastPWInput();
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// data members
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nsPlaintextEditor *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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nsString mPasswordIMEText; // a buffer we use to track the IME composition string
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PRUint32 mPasswordIMEIndex;
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nsCOMPtr<nsIDOMNode> mBogusNode; // magic node acts as placeholder in empty doc
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nsCOMPtr<nsIDOMNode> mCachedSelectionNode; // cached selected node
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PRInt32 mCachedSelectionOffset; // cached selected offset
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PRUint32 mFlags;
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PRUint32 mActionNesting;
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PRPackedBool mLockRulesSniffing;
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PRPackedBool mDidExplicitlySetInterline;
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PRPackedBool mDeleteBidiImmediately; // in bidirectional text, delete
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// characters not visually
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// adjacent to the caret without
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// moving the caret first.
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PRInt32 mTheAction; // the top level editor action
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nsCOMPtr<nsITimer> mTimer;
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PRUint32 mLastStart, mLastLength;
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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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entireList(PR_FALSE),
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bulletType(0),
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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 nsAString *inString;
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nsAString *outString;
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const nsAString *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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PRBool entireList;
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const nsAString *bulletType;
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// kAlign
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const nsAString *alignType;
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// kMakeBasicBlock
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const nsAString *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(PRPackedBool *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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PRPackedBool *mEnabled;
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PRPackedBool 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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