mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-09 09:20:15 +01:00
303 lines
9.9 KiB
C++
303 lines
9.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla 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/MPL/
|
|
*
|
|
* 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 the Initial Developer are Copyright (C) 1998-1999
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Pierre Phaneuf <pp@ludusdesign.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "PlaceholderTxn.h"
|
|
#include "nsEditor.h"
|
|
#include "IMETextTxn.h"
|
|
#include "nsAutoPtr.h"
|
|
|
|
PlaceholderTxn::PlaceholderTxn() : EditAggregateTxn(),
|
|
mAbsorb(PR_TRUE),
|
|
mForwarding(nsnull),
|
|
mIMETextTxn(nsnull),
|
|
mCommitted(PR_FALSE),
|
|
mStartSel(nsnull),
|
|
mEndSel(),
|
|
mEditor(nsnull)
|
|
{
|
|
}
|
|
|
|
|
|
PlaceholderTxn::~PlaceholderTxn()
|
|
{
|
|
delete mStartSel;
|
|
}
|
|
|
|
NS_IMPL_ADDREF_INHERITED(PlaceholderTxn, EditAggregateTxn)
|
|
NS_IMPL_RELEASE_INHERITED(PlaceholderTxn, EditAggregateTxn)
|
|
|
|
//NS_IMPL_QUERY_INTERFACE_INHERITED1(Class, Super, AdditionalInterface)
|
|
NS_IMETHODIMP PlaceholderTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
|
|
{
|
|
if (!aInstancePtr) return NS_ERROR_NULL_POINTER;
|
|
|
|
if (aIID.Equals(NS_GET_IID(nsIAbsorbingTransaction))) {
|
|
*aInstancePtr = (nsISupports*)(nsIAbsorbingTransaction*)(this);
|
|
NS_ADDREF_THIS();
|
|
return NS_OK;
|
|
}
|
|
if (aIID.Equals(NS_GET_IID(nsISupportsWeakReference))) {
|
|
*aInstancePtr = (nsISupports*)(nsISupportsWeakReference*) this;
|
|
NS_ADDREF_THIS();
|
|
return NS_OK;
|
|
}
|
|
return EditAggregateTxn::QueryInterface(aIID, aInstancePtr);
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::Init(nsIAtom *aName, nsSelectionState *aSelState, nsIEditor *aEditor)
|
|
{
|
|
if (!aEditor || !aSelState) return NS_ERROR_NULL_POINTER;
|
|
|
|
mName = aName;
|
|
mStartSel = aSelState;
|
|
mEditor = aEditor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::DoTransaction(void)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::UndoTransaction(void)
|
|
{
|
|
// undo txns
|
|
nsresult res = EditAggregateTxn::UndoTransaction();
|
|
if (NS_FAILED(res)) return res;
|
|
|
|
if (!mStartSel) return NS_ERROR_NULL_POINTER;
|
|
|
|
// now restore selection
|
|
nsCOMPtr<nsISelection> selection;
|
|
res = mEditor->GetSelection(getter_AddRefs(selection));
|
|
if (NS_FAILED(res)) return res;
|
|
if (!selection) return NS_ERROR_NULL_POINTER;
|
|
return mStartSel->RestoreSelection(selection);
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::RedoTransaction(void)
|
|
{
|
|
// redo txns
|
|
nsresult res = EditAggregateTxn::RedoTransaction();
|
|
if (NS_FAILED(res)) return res;
|
|
|
|
// now restore selection
|
|
nsCOMPtr<nsISelection> selection;
|
|
res = mEditor->GetSelection(getter_AddRefs(selection));
|
|
if (NS_FAILED(res)) return res;
|
|
if (!selection) return NS_ERROR_NULL_POINTER;
|
|
return mEndSel.RestoreSelection(selection);
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
|
|
{
|
|
if (!aDidMerge || !aTransaction) return NS_ERROR_NULL_POINTER;
|
|
|
|
// set out param default value
|
|
*aDidMerge=PR_FALSE;
|
|
|
|
if (mForwarding)
|
|
{
|
|
NS_NOTREACHED("tried to merge into a placeholder that was in forwarding mode!");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// check to see if aTransaction is one of the editor's
|
|
// private transactions. If not, we want to avoid merging
|
|
// the foreign transaction into our placeholder since we
|
|
// don't know what it does.
|
|
|
|
nsCOMPtr<nsPIEditorTransaction> pTxn = do_QueryInterface(aTransaction);
|
|
if (!pTxn) return NS_OK; // it's foreign so just bail!
|
|
|
|
EditTxn *editTxn = (EditTxn*)aTransaction; //XXX: hack, not safe! need nsIEditTransaction!
|
|
// determine if this incoming txn is a placeholder txn
|
|
nsCOMPtr<nsIAbsorbingTransaction> plcTxn;// = do_QueryInterface(editTxn);
|
|
// cant do_QueryInterface() above due to our broken transaction interfaces.
|
|
// instead have to brute it below. ugh.
|
|
editTxn->QueryInterface(NS_GET_IID(nsIAbsorbingTransaction), getter_AddRefs(plcTxn));
|
|
|
|
// we are absorbing all txn's if mAbsorb is lit.
|
|
if (mAbsorb)
|
|
{
|
|
nsRefPtr<IMETextTxn> otherTxn;
|
|
if (NS_SUCCEEDED(aTransaction->QueryInterface(IMETextTxn::GetCID(), getter_AddRefs(otherTxn))) && otherTxn)
|
|
{
|
|
// special handling for IMETextTxn's: they need to merge with any previous
|
|
// IMETextTxn in this placeholder, if possible.
|
|
if (!mIMETextTxn)
|
|
{
|
|
// this is the first IME txn in the placeholder
|
|
mIMETextTxn =otherTxn;
|
|
AppendChild(editTxn);
|
|
}
|
|
else
|
|
{
|
|
PRBool didMerge;
|
|
mIMETextTxn->Merge(otherTxn, &didMerge);
|
|
if (!didMerge)
|
|
{
|
|
// it wouldn't merge. Earlier IME txn is already commited and will
|
|
// not absorb further IME txns. So just stack this one after it
|
|
// and remember it as a candidate for further merges.
|
|
mIMETextTxn =otherTxn;
|
|
AppendChild(editTxn);
|
|
}
|
|
}
|
|
}
|
|
else if (!plcTxn) // see bug 171243: just drop incoming placeholders on the floor.
|
|
{ // their children will be swallowed by this preexisting one.
|
|
AppendChild(editTxn);
|
|
}
|
|
*aDidMerge = PR_TRUE;
|
|
// RememberEndingSelection();
|
|
// efficiency hack: no need to remember selection here, as we haven't yet
|
|
// finished the inital batch and we know we will be told when the batch ends.
|
|
// we can remeber the selection then.
|
|
}
|
|
else
|
|
{ // merge typing or IME or deletion transactions if the selection matches
|
|
if (((mName.get() == nsEditor::gTypingTxnName) ||
|
|
(mName.get() == nsEditor::gIMETxnName) ||
|
|
(mName.get() == nsEditor::gDeleteTxnName))
|
|
&& !mCommitted )
|
|
{
|
|
nsCOMPtr<nsIAbsorbingTransaction> plcTxn;// = do_QueryInterface(editTxn);
|
|
// can't do_QueryInterface() above due to our broken transaction interfaces.
|
|
// instead have to brute it below. ugh.
|
|
editTxn->QueryInterface(NS_GET_IID(nsIAbsorbingTransaction), getter_AddRefs(plcTxn));
|
|
if (plcTxn)
|
|
{
|
|
nsCOMPtr<nsIAtom> atom;
|
|
plcTxn->GetTxnName(getter_AddRefs(atom));
|
|
if (atom && (atom == mName))
|
|
{
|
|
// check if start selection of next placeholder matches
|
|
// end selection of this placeholder
|
|
PRBool isSame;
|
|
plcTxn->StartSelectionEquals(&mEndSel, &isSame);
|
|
if (isSame)
|
|
{
|
|
mAbsorb = PR_TRUE; // we need to start absorbing again
|
|
plcTxn->ForwardEndBatchTo(this);
|
|
// AppendChild(editTxn);
|
|
// see bug 171243: we don't need to merge placeholders
|
|
// into placeholders. We just reactivate merging in the pre-existing
|
|
// placeholder and drop the new one on the floor. The EndPlaceHolderBatch()
|
|
// call on the new placeholder will be forwarded to this older one.
|
|
RememberEndingSelection();
|
|
*aDidMerge = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::GetTxnDescription(nsAString& aString)
|
|
{
|
|
aString.AssignLiteral("PlaceholderTxn: ");
|
|
|
|
if (mName)
|
|
{
|
|
nsAutoString name;
|
|
mName->ToString(name);
|
|
aString += name;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::GetTxnName(nsIAtom **aName)
|
|
{
|
|
return GetName(aName);
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::StartSelectionEquals(nsSelectionState *aSelState, PRBool *aResult)
|
|
{
|
|
// determine if starting selection matches the given selection state.
|
|
// note that we only care about collapsed selections.
|
|
if (!aResult || !aSelState) return NS_ERROR_NULL_POINTER;
|
|
if (!mStartSel->IsCollapsed() || !aSelState->IsCollapsed())
|
|
{
|
|
*aResult = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
*aResult = mStartSel->IsEqual(aSelState);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::EndPlaceHolderBatch()
|
|
{
|
|
mAbsorb = PR_FALSE;
|
|
|
|
if (mForwarding)
|
|
{
|
|
nsCOMPtr<nsIAbsorbingTransaction> plcTxn = do_QueryReferent(mForwarding);
|
|
if (plcTxn) plcTxn->EndPlaceHolderBatch();
|
|
}
|
|
|
|
// remember our selection state.
|
|
return RememberEndingSelection();
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::ForwardEndBatchTo(nsIAbsorbingTransaction *aForwardingAddress)
|
|
{
|
|
mForwarding = do_GetWeakReference(aForwardingAddress);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::Commit()
|
|
{
|
|
mCommitted = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP PlaceholderTxn::RememberEndingSelection()
|
|
{
|
|
nsCOMPtr<nsISelection> selection;
|
|
nsresult res = mEditor->GetSelection(getter_AddRefs(selection));
|
|
if (NS_FAILED(res)) return res;
|
|
if (!selection) return NS_ERROR_NULL_POINTER;
|
|
return mEndSel.SaveSelection(selection);
|
|
}
|
|
|