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- // This is a part of the Microsoft Foundation Classes C++ library.
- // Copyright (C) 1992 Microsoft Corporation
- // All rights reserved.
- //
- // This source code is only intended as a supplement to the
- // Microsoft Foundation Classes Reference and Microsoft
- // QuickHelp and/or WinHelp documentation provided with the library.
- // See these sources for detailed information regarding the
- // Microsoft Foundation Classes product.
-
- #include "stdafx.h"
-
- #ifdef AFX_CORE2_SEG
- #pragma code_seg(AFX_CORE2_SEG)
- #endif
-
- #ifdef _DEBUG
- #undef THIS_FILE
- static char BASED_CODE THIS_FILE[] = __FILE__;
- #endif
-
- /////////////////////////////////////////////////////////////////////////////
- // CSingleDocTemplate
-
- IMPLEMENT_DYNAMIC(CSingleDocTemplate, CDocTemplate)
-
- /////////////////////////////////////////////////////////////////////////////
- // CSingleDocTemplate construction/destruction
-
- CSingleDocTemplate::CSingleDocTemplate(UINT nIDResource,
- CRuntimeClass* pDocClass,
- CRuntimeClass* pFrameClass, CRuntimeClass* pViewClass)
- : CDocTemplate(nIDResource, pDocClass, pFrameClass, pViewClass)
- {
- m_pOnlyDoc = NULL;
- }
-
- CSingleDocTemplate::~CSingleDocTemplate()
- {
- #ifdef _DEBUG
- if (m_pOnlyDoc != NULL)
- TRACE0("Warning: destroying CSingleDocTemplate with live document\n");
- #endif
- }
-
- /////////////////////////////////////////////////////////////////////////////
- // CSingleDocTemplate attributes
-
- POSITION CSingleDocTemplate::GetFirstDocPosition() const
- {
- return (m_pOnlyDoc == NULL) ? NULL : BEFORE_START_POSITION;
- }
-
- CDocument* CSingleDocTemplate::GetNextDoc(POSITION& rPos) const
- {
- CDocument* pDoc = NULL;
- if (rPos == BEFORE_START_POSITION)
- {
- // first time through, return a real document
- ASSERT(m_pOnlyDoc != NULL);
- pDoc = m_pOnlyDoc;
- }
- rPos = NULL; // no more
- return pDoc;
- }
-
- /////////////////////////////////////////////////////////////////////////////
- // CSingleDocTemplate document management (a list of currently open documents)
-
- void CSingleDocTemplate::AddDocument(CDocument* pDoc)
- {
- ASSERT(m_pOnlyDoc == NULL); // one at a time please
- ASSERT_VALID(pDoc);
-
- CDocTemplate::AddDocument(pDoc);
- m_pOnlyDoc = pDoc;
- }
-
- void CSingleDocTemplate::RemoveDocument(CDocument* pDoc)
- {
- ASSERT(m_pOnlyDoc == pDoc); // must be this one
- ASSERT_VALID(pDoc);
-
- CDocTemplate::RemoveDocument(pDoc);
- m_pOnlyDoc = NULL;
- }
-
- /////////////////////////////////////////////////////////////////////////////
- // CSingleDocTemplate commands
-
- CDocument* CSingleDocTemplate::OpenDocumentFile(const char* pszPathName)
- // if pszPathName == NULL => create new file of this type
- {
- CDocument* pDocument = NULL;
- CFrameWnd* pFrame = NULL;
- BOOL bCreated = FALSE; // => doc and frame created
- BOOL bWasModified = FALSE;
-
- if (m_pOnlyDoc != NULL)
- {
- // already have a document - reinit it
- pDocument = m_pOnlyDoc;
- if (!pDocument->SaveModified())
- return NULL; // leave the original one
-
- pFrame = (CFrameWnd*)AfxGetApp()->m_pMainWnd;
- ASSERT(pFrame != NULL);
- ASSERT(pFrame->IsKindOf(RUNTIME_CLASS(CFrameWnd)));
- ASSERT_VALID(pFrame);
- }
- else
- {
- // create a new document
- pDocument = CreateNewDocument();
- ASSERT(pFrame == NULL); // will be created below
- bCreated = TRUE;
- }
-
- if (pDocument == NULL)
- {
- AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);
- return NULL;
- }
- ASSERT(pDocument == m_pOnlyDoc);
-
- if (pFrame == NULL)
- {
- ASSERT(bCreated);
-
- // create frame - set as main document frame
- BOOL bOldAuto = pDocument->m_bAutoDelete;
- pDocument->m_bAutoDelete = FALSE;
- // don't destroy if something goes wrong
- pFrame = CreateNewFrame(pDocument, NULL);
- pDocument->m_bAutoDelete = bOldAuto;
- if (pFrame == NULL)
- {
- AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);
- delete pDocument; // explicit delete on error
- return NULL;
- }
- }
-
- if (pszPathName == NULL)
- {
- // create a new document
- CString strDocName;
- if (!GetDocString(strDocName, CDocTemplate::docName) ||
- strDocName.IsEmpty())
- {
- // use generic 'untitled'
- VERIFY(strDocName.LoadString(AFX_IDS_UNTITLED));
- }
- pDocument->SetTitle(strDocName);
-
- if (!pDocument->OnNewDocument())
- {
- // user has been alerted to what failed in OnNewDocument
- TRACE0("CDocument::OnNewDocument returned FALSE\n");
- if (bCreated)
- pFrame->DestroyWindow(); // will destroy document
- return NULL;
- }
- }
- else
- {
- // open an existing document
- bWasModified = pDocument->IsModified();
- pDocument->SetModifiedFlag(FALSE); // not dirty for open
-
- if (!pDocument->OnOpenDocument(pszPathName))
- {
- // user has been alerted to what failed in OnOpenDocument
- TRACE0("CDocument::OnOpenDocument returned FALSE\n");
- if (bCreated)
- {
- pFrame->DestroyWindow(); // will destroy document
- }
- else if (!pDocument->IsModified())
- {
- // original document is untouched
- pDocument->SetModifiedFlag(bWasModified);
- }
- else
- {
- // we corrupted the original document
- CString strDocName;
- if (!GetDocString(strDocName, CDocTemplate::docName) ||
- strDocName.IsEmpty())
- {
- // use generic 'untitled'
- VERIFY(strDocName.LoadString(AFX_IDS_UNTITLED));
- }
- pDocument->SetTitle(strDocName);
-
- if (!pDocument->OnNewDocument())
- {
- TRACE0("Error: OnNewDocument failed after failing to"
- " open a document - trying to continue\n");
- // assume we can continue
- }
- }
- return NULL; // open failed
- }
- }
-
- if (bCreated && AfxGetApp()->m_pMainWnd == NULL)
- {
- // set as main frame
- AfxGetApp()->m_pMainWnd = pFrame;
- // InitialUpdateFrame will show the window in the correct mode
- }
-
- InitialUpdateFrame(pFrame, pDocument);
- return pDocument;
- }
-
- /////////////////////////////////////////////////////////////////////////////
- // CSingleDocTemplate diagnostics
-
- #ifdef _DEBUG
- void CSingleDocTemplate::Dump(CDumpContext& dc) const
- {
- CDocTemplate::Dump(dc);
- if (m_pOnlyDoc)
- AFX_DUMP1(dc, "\nwith document: ", (void*)m_pOnlyDoc);
- else
- AFX_DUMP0(dc, "\nwith no document");
- }
-
- void CSingleDocTemplate::AssertValid() const
- {
- CDocTemplate::AssertValid();
- if (m_pOnlyDoc)
- ASSERT_VALID(m_pOnlyDoc);
- }
- #endif //_DEBUG
-
- /////////////////////////////////////////////////////////////////////////////
-