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added Undo/Redo method; construct instance of nsTransactionManager in InitializeFolderRoot()

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jefft%netscape.com 1999-06-08 22:15:04 +00:00
parent bbefbc1756
commit 7707a1a9b7
1 changed files with 48 additions and 2 deletions
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50
mailnews/base/src/nsMessenger.cpp
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@ -65,12 +65,18 @@
#include "nsMsgBaseCID.h"
#include "nsMsgLocalCID.h"
#include "nsIComponentManager.h"
#include "nsTransactionManagerCID.h"
#include "nsITransactionManager.h"
static NS_DEFINE_CID(kCMsgMailSessionCID, NS_MSGMAILSESSION_CID);
static NS_DEFINE_CID(kCPop3ServiceCID, NS_POP3SERVICE_CID);
static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
static NS_DEFINE_IID(kIDocumentViewerIID, NS_IDOCUMENT_VIEWER_IID);
static NS_DEFINE_CID(kNetServiceCID, NS_NETSERVICE_CID);
static NS_DEFINE_IID(kAppShellServiceCID, NS_APPSHELL_SERVICE_CID);
static NS_DEFINE_CID(kTransactionManagerCID, NS_TRANSACTIONMANAGER_CID);
static NS_DEFINE_CID(kComponentManagerCID, NS_COMPONENTMANAGER_CID);
// we need this because of an egcs 1.0 (and possibly gcc) compiler bug
// that doesn't allow you to call ::nsISupports::GetIID() inside of a class
@ -109,6 +115,8 @@ public:
NS_IMETHOD NewFolder(nsIRDFCompositeDataSource *database, nsIDOMXULElement *parentFolderElement,
const char *name);
NS_IMETHOD Undo();
NS_IMETHOD Redo();
protected:
nsresult DoDelete(nsIRDFCompositeDataSource* db, nsISupportsArray *srcArray, nsISupportsArray *deletedArray);
@ -118,6 +126,7 @@ private:
nsString mId;
void *mScriptObject;
nsCOMPtr<nsITransactionManager> mTxnMgr;
/* rhp - need this to drive message display */
nsIDOMWindow *mWindow;
@ -387,6 +396,16 @@ void nsMessenger::InitializeFolderRoot()
m_folderPath += "Inbox";
} // if we have a folder root for the current server
// create Undo/Redo Transaction Manager
NS_WITH_SERVICE (nsIComponentManager, compMgr, kComponentManagerCID, &rv);
if (NS_SUCCEEDED(rv))
{
rv = compMgr->CreateInstance(kTransactionManagerCID, nsnull,
nsITransactionManager::GetIID(),
getter_AddRefs(mTxnMgr));
if (NS_SUCCEEDED(rv))
mTxnMgr->SetMaxTransactionCount(-1);
}
}
NS_IMETHODIMP
@ -628,11 +647,11 @@ NS_IMETHODIMP
nsMessenger::OnUnload()
{
// ** clean up
// *** jt - We seems have one extra ref count. I have no idea where it
// *** jt - We seem to have one extra ref count. I have no idea where it
// came from. This could be the global object we created in commandglue.js
// which causes us to have one more ref count. Call Release() here
// seems the right thing to do. This gurantees the nsMessenger instance
// gets delete after we close down the messenger window.
// gets deleted after we close down the messenger window.
Release();
return NS_OK;
}
@ -780,3 +799,30 @@ nsMessenger::NewFolder(nsIRDFCompositeDataSource *database, nsIDOMXULElement *pa
return rv;
}
NS_IMETHODIMP
nsMessenger::Undo()
{
nsresult rv = NS_OK;
if (mTxnMgr)
{
PRInt32 numTxn = 0;
rv = mTxnMgr->GetNumberOfUndoItems(&numTxn);
if (NS_SUCCEEDED(rv) && numTxn > 0)
mTxnMgr->Undo();
}
return rv;
}
NS_IMETHODIMP
nsMessenger::Redo()
{
nsresult rv = NS_OK;
if (mTxnMgr)
{
PRInt32 numTxn = 0;
rv = mTxnMgr->GetNumberOfRedoItems(&numTxn);
if (NS_SUCCEEDED(rv) && numTxn > 0)
mTxnMgr->Redo();
}
return rv;
}