1999-01-07 20:56:20 +03:00
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/* -*- 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "DeleteTextTxn.h"
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#include "nsIDOMCharacterData.h"
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1999-02-22 18:53:31 +03:00
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#include "nsIDOMSelection.h"
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1999-01-07 20:56:20 +03:00
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As a reminder, we decided to do this based strictly content. Some support for style-based text properties is written, but not used
anywhere any more.
* Cleaned up split and join undo/redo.
* Added TypeInState, a data struct that remembers things about text properties for collapsed selections, so you can type
* Ctrl-B with an insertion point and the next character will be bold.
* Added all the logic to handle inline vs. block elements when setting text properties.
* Added some support for italic and underline as well. Adding these things is pretty easy now. Ctrl-B, Ctrl-I, Ctrl-U for testing bold, italic, underline.
* Added all the logic to make sure we only add style tags where they're needed, so you should never get the same style tag nested within itself, except as needed for block elements.
* Added methods for testing a node to see if a particular style is set. This isn't 100% done yet, but with very little work we could have toolbar buttons that respond to selection changed notification that show the state of bold, italic, underline, etc. in real time. Supports tri-state: whole selection is bold, some of selection is bold, none of selection is bold, ...
* Fully undoable and redoable.
* Added some debug printfs to transactions and editors. all controlled by a gNoisy static in each module. helps me track down undo/redo problems. if the output bugs people enough, I'll shut it off and re-enable it in my local tree.
Noticably missing: make un-bold, make un-italic, etc. This is coming soon.
1999-04-01 21:58:07 +04:00
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#ifdef NS_DEBUG
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static PRBool gNoisy = PR_TRUE;
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#else
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static const PRBool gNoisy = PR_FALSE;
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#endif
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1999-01-21 04:51:09 +03:00
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DeleteTextTxn::DeleteTextTxn()
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: EditTxn()
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{
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}
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1999-03-06 00:05:35 +03:00
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DeleteTextTxn::~DeleteTextTxn()
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{
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}
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1999-03-02 08:30:53 +03:00
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NS_IMETHODIMP DeleteTextTxn::Init(nsIEditor *aEditor,
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1999-04-04 22:01:35 +04:00
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nsIDOMCharacterData *aElement,
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PRUint32 aOffset,
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PRUint32 aNumCharsToDelete)
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1999-01-07 20:56:20 +03:00
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{
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1999-02-22 18:53:31 +03:00
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NS_ASSERTION(aEditor&&aElement, "bad arg");
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mEditor = do_QueryInterface(aEditor);
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1999-02-19 14:30:31 +03:00
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mElement = do_QueryInterface(aElement);
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1999-01-07 20:56:20 +03:00
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mOffset = aOffset;
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mNumCharsToDelete = aNumCharsToDelete;
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1999-03-02 10:52:41 +03:00
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NS_ASSERTION(0!=aNumCharsToDelete, "bad arg, numCharsToDelete");
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1999-04-04 22:01:35 +04:00
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PRUint32 count;
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aElement->GetLength(&count);
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NS_ASSERTION(count<aNumCharsToDelete, "bad arg, numCharsToDelete. Not enough characters in node");
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NS_ASSERTION(count<aOffset+aNumCharsToDelete, "bad arg, numCharsToDelete. Not enough characters in node");
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1999-01-07 20:56:20 +03:00
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mDeletedText = "";
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1999-01-21 04:51:09 +03:00
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return NS_OK;
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1999-01-07 20:56:20 +03:00
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}
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1999-03-02 08:30:53 +03:00
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NS_IMETHODIMP DeleteTextTxn::Do(void)
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1999-01-07 20:56:20 +03:00
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{
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As a reminder, we decided to do this based strictly content. Some support for style-based text properties is written, but not used
anywhere any more.
* Cleaned up split and join undo/redo.
* Added TypeInState, a data struct that remembers things about text properties for collapsed selections, so you can type
* Ctrl-B with an insertion point and the next character will be bold.
* Added all the logic to handle inline vs. block elements when setting text properties.
* Added some support for italic and underline as well. Adding these things is pretty easy now. Ctrl-B, Ctrl-I, Ctrl-U for testing bold, italic, underline.
* Added all the logic to make sure we only add style tags where they're needed, so you should never get the same style tag nested within itself, except as needed for block elements.
* Added methods for testing a node to see if a particular style is set. This isn't 100% done yet, but with very little work we could have toolbar buttons that respond to selection changed notification that show the state of bold, italic, underline, etc. in real time. Supports tri-state: whole selection is bold, some of selection is bold, none of selection is bold, ...
* Fully undoable and redoable.
* Added some debug printfs to transactions and editors. all controlled by a gNoisy static in each module. helps me track down undo/redo problems. if the output bugs people enough, I'll shut it off and re-enable it in my local tree.
Noticably missing: make un-bold, make un-italic, etc. This is coming soon.
1999-04-01 21:58:07 +04:00
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if (gNoisy) { printf("Do Delete Text\n"); }
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1999-02-22 18:53:31 +03:00
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nsresult result = NS_ERROR_NULL_POINTER;
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if (mEditor && mElement)
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{
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// get the text that we're about to delete
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result = mElement->SubstringData(mOffset, mNumCharsToDelete, mDeletedText);
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NS_ASSERTION(NS_SUCCEEDED(result), "could not get text to delete.");
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result = mElement->DeleteData(mOffset, mNumCharsToDelete);
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if (NS_SUCCEEDED(result))
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{
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nsCOMPtr<nsIDOMSelection> selection;
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nsresult selectionResult = mEditor->GetSelection(getter_AddRefs(selection));
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if (NS_SUCCEEDED(selectionResult) && selection) {
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selectionResult = selection->Collapse(mElement, mOffset);
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NS_ASSERTION((NS_SUCCEEDED(selectionResult)), "selection could not be collapsed after undo of insert.");
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}
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}
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}
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return result;
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1999-01-07 20:56:20 +03:00
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}
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1999-02-22 18:53:31 +03:00
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//XXX: we may want to store the selection state and restore it properly
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// was it an insertion point or an extended selection?
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1999-03-02 08:30:53 +03:00
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NS_IMETHODIMP DeleteTextTxn::Undo(void)
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1999-01-07 20:56:20 +03:00
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{
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As a reminder, we decided to do this based strictly content. Some support for style-based text properties is written, but not used
anywhere any more.
* Cleaned up split and join undo/redo.
* Added TypeInState, a data struct that remembers things about text properties for collapsed selections, so you can type
* Ctrl-B with an insertion point and the next character will be bold.
* Added all the logic to handle inline vs. block elements when setting text properties.
* Added some support for italic and underline as well. Adding these things is pretty easy now. Ctrl-B, Ctrl-I, Ctrl-U for testing bold, italic, underline.
* Added all the logic to make sure we only add style tags where they're needed, so you should never get the same style tag nested within itself, except as needed for block elements.
* Added methods for testing a node to see if a particular style is set. This isn't 100% done yet, but with very little work we could have toolbar buttons that respond to selection changed notification that show the state of bold, italic, underline, etc. in real time. Supports tri-state: whole selection is bold, some of selection is bold, none of selection is bold, ...
* Fully undoable and redoable.
* Added some debug printfs to transactions and editors. all controlled by a gNoisy static in each module. helps me track down undo/redo problems. if the output bugs people enough, I'll shut it off and re-enable it in my local tree.
Noticably missing: make un-bold, make un-italic, etc. This is coming soon.
1999-04-01 21:58:07 +04:00
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if (gNoisy) { printf("Undo Delete Text\n"); }
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1999-02-22 18:53:31 +03:00
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nsresult result = NS_ERROR_NULL_POINTER;
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if (mEditor && mElement)
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{
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result = mElement->InsertData(mOffset, mDeletedText);
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if (NS_SUCCEEDED(result))
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{
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nsCOMPtr<nsIDOMSelection> selection;
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nsresult selectionResult = mEditor->GetSelection(getter_AddRefs(selection));
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if (NS_SUCCEEDED(selectionResult) && selection) {
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selectionResult = selection->Collapse(mElement, mOffset);
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NS_ASSERTION((NS_SUCCEEDED(selectionResult)), "selection could not be collapsed after undo of insert.");
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}
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}
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}
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return result;
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1999-01-07 20:56:20 +03:00
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}
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1999-03-02 08:30:53 +03:00
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NS_IMETHODIMP DeleteTextTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
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1999-01-07 20:56:20 +03:00
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{
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1999-01-14 21:02:45 +03:00
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if (nsnull!=aDidMerge)
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*aDidMerge=PR_FALSE;
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1999-01-07 20:56:20 +03:00
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return NS_OK;
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}
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1999-03-02 08:30:53 +03:00
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NS_IMETHODIMP DeleteTextTxn::Write(nsIOutputStream *aOutputStream)
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1999-01-07 20:56:20 +03:00
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{
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return NS_OK;
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}
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1999-03-02 08:30:53 +03:00
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NS_IMETHODIMP DeleteTextTxn::GetUndoString(nsString **aString)
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1999-01-07 20:56:20 +03:00
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{
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if (nsnull!=aString)
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{
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**aString="Insert Text: ";
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**aString += mDeletedText;
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}
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return NS_OK;
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}
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1999-03-02 08:30:53 +03:00
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NS_IMETHODIMP DeleteTextTxn::GetRedoString(nsString **aString)
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1999-01-07 20:56:20 +03:00
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{
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if (nsnull!=aString)
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{
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**aString="Remove Text: ";
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**aString += mDeletedText;
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}
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return NS_OK;
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}
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