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// Feel free to use this code in your own applications.
// The Author does not guarantee anything about this code.
// Author : Yves Maurer
// FormattedTextDraw.h : Declaration of the CFormattedTextDraw
#ifndef __FORMATTEDTEXTDRAW_H_
#define __FORMATTEDTEXTDRAW_H_
#ifndef LY_PER_INCH
#define LY_PER_INCH 1440
#define HOST_BORDER 0
#endif
struct COOKIE
{
bool isUnicode;
union
{
char *ansi;
WCHAR *unicode;
};
size_t cbSize, cbCount;
};
extern HRESULT(WINAPI *MyCreateTextServices)(IUnknown *punkOuter, ITextHost *pITextHost, IUnknown **ppUnk);
/////////////////////////////////////////////////////////////////////////////
// IFormatttedTextDraw
interface IFormattedTextDraw
{
public:
virtual ~IFormattedTextDraw() {};
virtual HRESULT get_NaturalSize(void *hdcDraw, long *Width, long *pVal) = 0;
virtual HRESULT Create() = 0;
virtual HRESULT Draw(void *hdcDraw, RECT *prc) = 0;
virtual HRESULT putRTFTextA(char *newVal) = 0;
virtual HRESULT putRTFTextW(WCHAR *newVal) = 0;
virtual HRESULT putTextA(char *newVal) = 0;
virtual HRESULT putTextW(WCHAR *newVal) = 0;
virtual ITextServices *getTextService() = 0;
virtual ITextDocument *getTextDocument() = 0;
virtual void setParentWnd(HWND hwnd, RECT rect) = 0;
// COM-like functions
virtual ULONG STDMETHODCALLTYPE AddRef(void) = 0;
virtual ULONG STDMETHODCALLTYPE Release(void) = 0;
};
/////////////////////////////////////////////////////////////////////////////
// CFormattedTextDraw
class CFormattedTextDraw :
public ITextHost,
public IFormattedTextDraw
{
public:
CFormattedTextDraw()
{
HDC hdcScreen;
hdcScreen = GetDC(nullptr);
nPixelsPerInchX = GetDeviceCaps(hdcScreen, LOGPIXELSX);
nPixelsPerInchY = GetDeviceCaps(hdcScreen, LOGPIXELSY);
ReleaseDC(nullptr, hdcScreen);
SetRectEmpty(&m_rcClient);
SetRectEmpty(&m_rcViewInset);
m_pCF = (CHARFORMAT2W*)malloc(sizeof(CHARFORMAT2W));
InitDefaultCharFormat();
InitDefaultParaFormat();
m_spTextServices = nullptr;
m_spTextDocument = nullptr;
m_dwPropertyBits = TXTBIT_RICHTEXT | TXTBIT_MULTILINE | TXTBIT_WORDWRAP | TXTBIT_USECURRENTBKG;
m_dwScrollbar = 0;
m_dwMaxLength = INFINITE;
}
~CFormattedTextDraw()
{
free(m_pCF);
if (m_spTextServices != nullptr)
m_spTextServices->Release();
if (m_spTextDocument != nullptr)
m_spTextDocument->Release();
}
// Minimal COM functionality
HRESULT STDMETHODCALLTYPE QueryInterface(
/* [in] */ REFIID,
/* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject)
{
*ppvObject = nullptr;
return S_FALSE;
}
ULONG STDMETHODCALLTYPE AddRef(void)
{
return 0;
}
ULONG STDMETHODCALLTYPE Release(void)
{
return 0;
}
// IFormattedTextDraw
public:
HRESULT get_NaturalSize(void *hdcDraw, long *Width, long *pVal);
HRESULT Create();
HRESULT Draw(void *hdcDraw, RECT *prc);
HRESULT putRTFTextA(char *newVal);
HRESULT putRTFTextW(WCHAR *newVal);
HRESULT putTextA(char *newVal);
HRESULT putTextW(WCHAR *newVal);
ITextServices *getTextService() { return m_spTextServices; };
ITextDocument *getTextDocument() { return m_spTextDocument; };
virtual void setParentWnd(HWND hwnd, RECT rect) { m_hwndParent = hwnd; m_rcClient = rect; }
// ITextHost
HDC TxGetDC();
INT TxReleaseDC(HDC hdc);
BOOL TxShowScrollBar(INT fnBar, BOOL fShow);
BOOL TxEnableScrollBar(INT fuSBFlags, INT fuArrowflags);
BOOL TxSetScrollRange(INT fnBar, LONG nMinPos, INT nMaxPos, BOOL fRedraw);
BOOL TxSetScrollPos(INT fnBar, INT nPos, BOOL fRedraw);
void TxInvalidateRect(LPCRECT prc, BOOL fMode);
void TxViewChange(BOOL fUpdate);
BOOL TxCreateCaret(HBITMAP hbmp, INT xWidth, INT yHeight);
BOOL TxShowCaret(BOOL fShow);
BOOL TxSetCaretPos(INT x, INT y);
BOOL TxSetTimer(UINT idTimer, UINT uTimeout);
void TxKillTimer(UINT idTimer);
void TxScrollWindowEx(INT dx, INT dy, LPCRECT lprcScroll, LPCRECT lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate, UINT fuScroll);
void TxSetCapture(BOOL fCapture);
void TxSetFocus();
void TxSetCursor(HCURSOR hcur, BOOL fText);
BOOL TxScreenToClient(LPPOINT lppt);
BOOL TxClientToScreen(LPPOINT lppt);
HRESULT TxActivate(LONG * plOldState);
HRESULT TxDeactivate(LONG lNewState);
HRESULT TxGetClientRect(LPRECT prc);
HRESULT TxGetViewInset(LPRECT prc);
HRESULT TxGetCharFormat(const CHARFORMATW **ppCF);
HRESULT TxGetParaFormat(const PARAFORMAT **ppPF);
COLORREF TxGetSysColor(int nIndex);
HRESULT TxGetBackStyle(TXTBACKSTYLE *pstyle);
HRESULT TxGetMaxLength(DWORD *plength);
HRESULT TxGetScrollBars(DWORD *pdwScrollBar);
HRESULT TxGetPasswordChar(wchar_t *pch);
HRESULT TxGetAcceleratorPos(LONG *pcp);
HRESULT TxGetExtent(LPSIZEL lpExtent);
HRESULT OnTxCharFormatChange(const CHARFORMATW * pcf);
HRESULT OnTxParaFormatChange(const PARAFORMAT * ppf);
HRESULT TxGetPropertyBits(DWORD dwMask, DWORD *pdwBits);
HRESULT TxNotify(DWORD iNotify, void *pv);
HIMC TxImmGetContext();
void TxImmReleaseContext(HIMC himc);
HRESULT TxGetSelectionBarWidth(LONG *lSelBarWidth);
// Custom functions
HRESULT CharFormatFromHFONT(CHARFORMAT2W* pCF, HFONT hFont);
HRESULT InitDefaultCharFormat();
HRESULT InitDefaultParaFormat();
HRESULT CreateTextServicesObject();
// Variables
HWND m_hwndParent;
RECT m_rcClient; // Client Rect
RECT m_rcViewInset; // view rect inset
SIZEL m_sizelExtent; // Extent array
int nPixelsPerInchX; // Pixels per logical inch along width
int nPixelsPerInchY; // Pixels per logical inch along height
CHARFORMAT2W *m_pCF;
PARAFORMAT2 m_PF;
DWORD m_dwScrollbar; // Scroll bar style
DWORD m_dwPropertyBits; // Property bits
DWORD m_dwMaxLength;
COOKIE m_editCookie;
ITextServices *m_spTextServices;
ITextDocument *m_spTextDocument;
};
#endif //__FORMATTEDTEXTDRAW_H_
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