gecko-dev/editor/base/InsertElementTxn.cpp

159 строки
4.4 KiB
C++
Исходник Обычный вид История

/* -*- 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) 1998-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "InsertElementTxn.h"
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.
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#include "nsIDOMSelection.h"
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#include "nsIContent.h"
#ifdef NS_DEBUG
static PRBool gNoisy = PR_FALSE;
#else
static const PRBool gNoisy = PR_FALSE;
#endif
InsertElementTxn::InsertElementTxn()
: EditTxn()
{
SetTransactionDescriptionID( kTransactionID );
/* log description initialized in parent constructor */
}
NS_IMETHODIMP InsertElementTxn::Init(nsIDOMNode *aNode,
nsIDOMNode *aParent,
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.
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PRInt32 aOffset,
nsIEditor *aEditor)
{
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.
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NS_ASSERTION(aNode && aParent && aEditor, "bad arg");
if (!aNode || !aParent || !aEditor)
return NS_ERROR_NULL_POINTER;
mNode = do_QueryInterface(aNode);
mParent = do_QueryInterface(aParent);
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mOffset = aOffset;
mEditor = aEditor;
if (!mNode || !mParent || !mEditor)
return NS_ERROR_INVALID_ARG;
return NS_OK;
}
InsertElementTxn::~InsertElementTxn()
{
}
NS_IMETHODIMP InsertElementTxn::Do(void)
{
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if (gNoisy)
{
nsCOMPtr<nsIContent>nodeAsContent = do_QueryInterface(mNode);
nsCOMPtr<nsIContent>parentAsContent = do_QueryInterface(mParent);
nsString namestr;
mNode->GetNodeName(namestr);
char* nodename = namestr.ToNewCString();
printf("%p Do Insert Element of %p <%s> into parent %p at offset %d\n",
this, nodeAsContent.get(), nodename,
parentAsContent.get(), mOffset);
nsAllocator::Free(nodename);
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}
if (!mNode || !mParent) return NS_ERROR_NOT_INITIALIZED;
nsresult result;
nsCOMPtr<nsIDOMNode>refNode;
//if (0!=mOffset)
{ // get a ref node
PRInt32 i=0;
result = mParent->GetFirstChild(getter_AddRefs(refNode));
if (NS_SUCCEEDED(result) && refNode)
{
for (; i<mOffset; i++)
{
nsCOMPtr<nsIDOMNode>nextSib;
result = refNode->GetNextSibling(getter_AddRefs(nextSib));
if (NS_FAILED(result)) {
break; // couldn't get a next sibling, so make aNode the first child
}
refNode = do_QueryInterface(nextSib);
if (!refNode) {
break; // couldn't get a next sibling, so make aNode the first child
}
}
}
}
nsCOMPtr<nsIDOMNode> resultNode;
result = mParent->InsertBefore(mNode, refNode, getter_AddRefs(resultNode));
if (NS_FAILED(result)) return result;
if (!resultNode) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMSelection> selection;
result = mEditor->GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) return result;
if (!selection) return NS_ERROR_NULL_POINTER;
// place the selection just after the inserted element
selection->Collapse(mParent, mOffset+1);
//selection->Extend(mParent, mOffset+1);
return result;
}
NS_IMETHODIMP InsertElementTxn::Undo(void)
{
if (gNoisy) { printf("%p Undo Insert Element of %p into parent %p at offset %d\n",
this, mNode.get(), mParent.get(), mOffset); }
if (!mNode || !mParent) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDOMNode> resultNode;
nsresult result = mParent->RemoveChild(mNode, getter_AddRefs(resultNode));
return result;
}
NS_IMETHODIMP InsertElementTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
{
if (nsnull!=aDidMerge)
*aDidMerge=PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP InsertElementTxn::Write(nsIOutputStream *aOutputStream)
{
return NS_OK;
}
NS_IMETHODIMP InsertElementTxn::GetUndoString(nsString *aString)
{
if (nsnull!=aString)
{
*aString="Remove Element: ";
}
return NS_OK;
}
NS_IMETHODIMP InsertElementTxn::GetRedoString(nsString *aString)
{
if (nsnull!=aString)
{
*aString="Insert Element: ";
}
return NS_OK;
}