sledit.c

详细的MiniGUI源代码

		if (IsACCharBeforePos (pEditData->buffer, pEditData->iEditPos)) {
			scrollStep = 2;
			pEditData->iEditPos -= 2;
		}
		else {
			scrollStep = 1;
			pEditData->iEditPos --;
		}
		
		pEditData->iCaretPos -= scrollStep;
		if (pEditData->iCaretPos == 0 && pEditData->iEditPos != 0) {
			bScroll = TRUE;
			if (IsACCharBeforePos(pEditData->buffer,
				pEditData->iEditPos)) {
				pEditData->iStartPos -= 2;
				pEditData->iCaretPos = 2;
			}
			else{
				pEditData->iStartPos --;
				pEditData->iCaretPos = 1;
			}
		}
		else if (pEditData->iCaretPos < 0) {
			pEditData->iStartPos = 0;
			pEditData->iCaretPos = 0;
		}
		
		SetCaretPos (hWnd,
			pEditData->iCaretPos * GetSysCharWidth ()
			+ pEditData->iLeftMargin,
			pEditData->iTopMargin);
		
		if (bScroll)
			InvalidateRect (hWnd, NULL, TRUE);
		break;	
	case SCANCODE_RIGHT:
		bScroll = FALSE;
		if (pEditData->iEditPos == pEditData->iDataLen)
			return 0;
		
		if (IsACCharAtPos (pEditData->buffer,
				pEditData->iDataLen,
				pEditData->iStartPos)) {
			if (IsACCharAtPos (pEditData->buffer,
					pEditData->iDataLen,
					pEditData->iEditPos)) {
				scrollStep = 2;
				moveStep = 2;
				pEditData->iEditPos  += 2;
			}
			else {
				scrollStep = 2;
				moveStep = 1;
				pEditData->iEditPos ++;
			}
		}
		else {// isn't a chinese character at start position
			if (IsACCharAtPos (pEditData->buffer,
					pEditData->iDataLen,
					pEditData->iEditPos)) {
			
				if (IsACCharAtPos (pEditData->buffer,
						pEditData->iDataLen,
						pEditData->iStartPos + 1))
					scrollStep = 3;
				else
					scrollStep = 2;
				
				moveStep = 2;
				pEditData->iEditPos += 2;
			}
			else {
				scrollStep = 1;
				moveStep = 1;
				pEditData->iEditPos ++;
			}
		}
		iLimit = pWin->rect.right - pWin->rect.left + 1 - 2 * wndGetBorder(hWnd) 
			 - pEditData->iLeftMargin - pEditData->iRightMargin;

		pEditData->iCaretPos += moveStep;
		if (pEditData->iCaretPos * GetSysCharWidth () > iLimit) {
			bScroll = TRUE;
			pEditData->iStartPos += scrollStep;
			
			pEditData->iCaretPos =
					pEditData->iEditPos - pEditData->iStartPos;
		}
		SetCaretPos (hWnd,
				pEditData->iCaretPos * GetSysCharWidth ()
				+ pEditData->iLeftMargin,
				pEditData->iTopMargin);
		
		if (bScroll)
			InvalidateRect (hWnd, NULL, TRUE);
		break;				
	case SCANCODE_INS:
		pEditData = (PSLEditData) (pWin->dwData);
		pEditData->dwStatus ^= EST_REPLACE;
		break;
	case SCANCODE_DEL:
	{
		int i;
		pEditData = (PSLEditData) (pWin->dwData);
		if ((pWin->dwStyle & ES_READONLY)
				|| (pEditData->iEditPos == pEditData->iDataLen)){
			return 0;
		}
		
		if (IsACCharAtPos (pEditData->buffer,
				pEditData->iDataLen,
				pEditData->iEditPos))
			deleted = 2;
		else
			deleted = 1;
	
		for(i=pEditData->iEditPos; i<pEditData->iDataLen; i++)
			pEditData->buffer[i] = pEditData->buffer[i+deleted];	
		//for (i = pEditData->iEditPos;
		//		i < pEditData->iDataLen - deleted; i++)
		//	pEditData->buffer [i] = pEditData->buffer [i + deleted];
		
		pEditData->iDataLen -= deleted;
		bChange = TRUE;
		
		InvRect.left = pEditData->iLeftMargin
				+ pEditData->iCaretPos * GetSysCharWidth ();
		InvRect.top = pEditData->iTopMargin;
		InvRect.right = pWin->rect.right - pWin->rect.left;
		InvRect.bottom = pWin->rect.bottom - pWin->rect.top;
		
		InvalidateRect (hWnd, &InvRect, TRUE);
		break;
	}	
	case SCANCODE_BACKSPACE:
	{
		int i;
		pEditData = (PSLEditData) (pWin->dwData);
		if ((pEditData->dwStatus & ES_READONLY) || (pEditData->iEditPos == 0)) {
			return 0;
		}
		
		if (IsACCharBeforePos (pEditData->buffer, pEditData->iEditPos))
			deleted = 2;
		else
			deleted = 1;
		
		for (i = pEditData->iEditPos - deleted; i < pEditData->iDataLen; i++)
			pEditData->buffer [i] = pEditData->buffer [i + deleted];
		
		pEditData->iDataLen -= deleted;
		pEditData->iEditPos -= deleted;
		bChange = TRUE;
		
		pEditData->iCaretPos -= deleted;
		if (pEditData->iCaretPos == 0 && pEditData->iEditPos != 0) {
			if (IsACCharBeforePos (pEditData->buffer, 
					pEditData->iEditPos)) {
				pEditData->iStartPos -= 2;
				pEditData->iCaretPos = 2;
			}
			else {
				pEditData->iStartPos --;
				pEditData->iCaretPos = 1;
			}
		
			InvRect.left = pEditData->iLeftMargin;
			InvRect.top = pEditData->iTopMargin;
			InvRect.right = pWin->rect.right - pWin->rect.left;
			InvRect.bottom = pWin->rect.bottom - pWin->rect.top;
		}
		else {
			InvRect.left = pEditData->iLeftMargin
					+ pEditData->iCaretPos * GetSysCharWidth ();
			InvRect.top = pEditData->iTopMargin;
			InvRect.right = pWin->rect.right - pWin->rect.left;
			InvRect.bottom = pWin->rect.bottom - pWin->rect.top;
		}
		
		SetCaretPos (hWnd,
				pEditData->iCaretPos * GetSysCharWidth ()
				+ pEditData->iLeftMargin,
				pEditData->iTopMargin);
				
		InvalidateRect (hWnd, &InvRect, TRUE);
		break;
	}
	}
	if (bChange)
		NotifyParent (hWnd, EN_CHANGE);
	return 0;
}



static int
edtProcessChar(
	HWND hWnd,
	WPARAM wParam,
	LPARAM lParam
)
{	
	PWindowsTree pWin;
	PSLEditData pEditData;
	char charBuffer[2];
	int chars, inserting, scrollStep, iLimit;
	RECT InvRect;
	int i;
	
	pWin = (PWindowsTree)hWnd;
	pEditData = (PSLEditData) (pWin->dwData);
	
	if (pWin->dwStyle & ES_READONLY) {
		return 0;
	}
	
	if (HIBYTE (wParam)) {
		charBuffer [0] = LOBYTE (wParam);
		charBuffer [1] = HIBYTE (wParam);
		chars = 2;
	}
	else {
		charBuffer [0] = LOBYTE (wParam);
		chars = 1;
	}
	
	if (chars == 1) {
		switch (charBuffer [0]){
		case 0x00:  // NULL
		case 0x07:  // BEL
		case 0x08:  // BS
		case 0x09:  // HT
		case 0x0A:  // LF
		case 0x0B:  // VT
		case 0x0C:  // FF
		case 0x0D:  // CR
		case 0x1B:  // Escape
		return 0;
		}
	}
	
	if (pEditData->dwStatus & EST_REPLACE) {
		if (pEditData->iDataLen == pEditData->iEditPos)
			inserting = chars;
		else if (IsACCharAtPos (pEditData->buffer,
				pEditData->iDataLen,
				pEditData->iEditPos)) {
			if (chars == 2)
				inserting = 0;
			else
				inserting = -1;
		}
		else {
			if (chars == 2)
				inserting = 1;
			else
				inserting = 0;
		}
	}
	else
		inserting = chars;
	
	// check space
	if (pEditData->iDataLen + inserting > pEditData->iBufferLen) {
		NotifyParent(hWnd,EN_MAXTEXT);
		return 0;
	}

	
	if (inserting == -1) {
		for (i = pEditData->iEditPos; i < pEditData->iDataLen-1; i++)
			pEditData->buffer [i] = pEditData->buffer [i + 1];
	}
	else if (inserting > 0) {
		for (i = pEditData->iDataLen + inserting - 1;
				i > pEditData->iEditPos + inserting - 1;i--)
			pEditData->buffer [i] = pEditData->buffer [i - inserting];
	}
	
	for (i = 0; i < chars; i++)
		pEditData->buffer [pEditData->iEditPos + i] = charBuffer [i];
	
	pEditData->iEditPos += chars;
	pEditData->iCaretPos += chars;
	pEditData->iDataLen += inserting;
	
	iLimit = pWin->rect.right - pWin->rect.left + 1 - 2 * wndGetBorder(hWnd) 
		 - pEditData->iLeftMargin - pEditData->iRightMargin;
	
	if (pEditData->iCaretPos * GetSysCharWidth () > iLimit){
		if (IsACCharAtPos (pEditData->buffer,
				pEditData->iDataLen,
				pEditData->iStartPos))
			scrollStep = 2;
		else {
			if (chars == 2) {
				if (IsACCharAtPos (pEditData->buffer,
						pEditData->iDataLen,
						pEditData->iStartPos + 1))
					scrollStep = 3;
				else
					scrollStep = 2;
			}
			else
				scrollStep = 1;
		}
	
		pEditData->iStartPos += scrollStep;
		
		pEditData->iCaretPos =
				pEditData->iEditPos - pEditData->iStartPos;
		
		InvRect.left = pEditData->iLeftMargin;
		InvRect.top = pEditData->iTopMargin;
		InvRect.right = pWin->rect.right - pWin->rect.left;
		InvRect.bottom = pWin->rect.bottom - pWin->rect.top;
	}
	else {
		InvRect.left = pEditData->iLeftMargin
				+ (pEditData->iCaretPos - chars)
				* GetSysCharWidth ();
		InvRect.top = pEditData->iTopMargin;
		InvRect.right = pWin->rect.right - pWin->rect.left;
		InvRect.bottom = pWin->rect.bottom - pWin->rect.top;
	}
	
	SetCaretPos (hWnd,
			pEditData->iCaretPos * GetSysCharWidth ()
			+ pEditData->iLeftMargin,
			pEditData->iTopMargin);
	InvalidateRect (hWnd, &InvRect, TRUE);
	
	NotifyParent (hWnd, EN_CHANGE);
	
	return 0;	
}

static BOOL
IsACCharBeforePos(
	char* pBuffer, 
	int iPos
)
{
	if(iPos < 2)
		return false;
	if(((unsigned char)*(pBuffer + iPos - 1) > 0xA0) && ((unsigned char)*(pBuffer + iPos - 2) > 0xA0))
		return true;
	return false;
}

static BOOL
IsACCharAtPos(
	char* pBuffer,
	int iLen,
	int iPos
)
{
	if(iPos > iLen - 2)
		return false;
	if(((unsigned char)*(pBuffer + iPos) > 0xA0) && ((unsigned char)*(pBuffer + iPos + 1) > 0xA0))
		return true;
	return false;
	
}

//get caret position according to the pendown postion 

static int 
edtGetCaretPos(
	PSLEditData pEditData, 
	int x
)
{
	char* pBuffer;
	int iRet;
	int iWidth, iSysCharWidth, iSysCCharWidth;
	int iOffset;
	iWidth = 0;
	iRet = 0;
	iSysCharWidth = GetSysCharWidth();
	iSysCCharWidth = GetSysCCharWidth();
	iOffset = x - pEditData->iLeftMargin;
	pBuffer = pEditData->buffer;
	while(*pBuffer){
		if((unsigned char)*pBuffer > 0xA0){
			iWidth += iSysCCharWidth;
			pBuffer += 2; 
			iRet += 2;
		}
		else{
			iWidth += iSysCharWidth;
			pBuffer ++;
			iRet += 1;
		}
		if(iWidth >= iOffset)
			break;
	}
	return iRet;
}



static int
GetEditBoxDispLen(
	HWND hWnd
)
{
	PWindowsTree pWin;
	PSLEditData pEditData;
	int iRet,iCurWidth;
	int iLimit;
	int iSysCharWidth, iSysCCharWidth;
	char* pBuffer;
	pWin = (PWindowsTree)hWnd;
	if(!pWin)
		return -1;
	pEditData = (PSLEditData)(pWin->dwData);
	if(!pEditData)
		return -1;
	iLimit = pWin->rect.right - pWin->rect.left + 1 - 2 * wndGetBorder(hWnd) 
		 - pEditData->iLeftMargin - pEditData->iRightMargin;
	pBuffer = pEditData->buffer;
	iCurWidth = 0;
	iRet = 0;
	iSysCharWidth = GetSysCharWidth();
	iSysCCharWidth = GetSysCCharWidth();
	while(pBuffer){
		if((unsigned char)*pBuffer>0xA0){
			iCurWidth += iSysCCharWidth;
			iRet += 2;
			pBuffer += 2;
		}
		else{
			iCurWidth += iSysCharWidth;
			iRet += 1;
			pBuffer ++;
		}
		if(iCurWidth >= iLimit)
			break;
	}
	return iRet;
	
}

//In case of moving the cursor to the end of the box
static int 
GetStartPos(
	HWND hWnd,
	PSLEditData pEditData
)
{
	PWindowsTree pWin;
	char* pBuffer;
	int iLimit;
	int iPos;
	pWin = (PWindowsTree)hWnd;
	if(!pWin)
		return -1;
	pBuffer = pEditData->buffer;
	if(!pBuffer)
		return -1;
	iLimit = pWin->rect.right - pWin->rect.left + 1 - 2 * wndGetBorder(hWnd) 
		 - pEditData->iLeftMargin - pEditData->iRightMargin;
	iPos = 0;
	while(pBuffer){
		if((unsigned char)*pBuffer > 0xA0){
			iPos +=2;
			pBuffer += 2;
		}
		else{
			iPos ++;
			pBuffer ++;
		}
		if((pEditData->iDataLen - iPos)*GetSysCharWidth() < iLimit)
			return iPos;
	}
	return -1;
		
}