mledit.c

详细的MiniGUI源代码

edtScanCodeEnd(
	HWND hWnd
)
{
	char pStrDisp[LEN_MLEDIT_LINEBUFFER];
	PMLEditData pEditData;
	PLineData pLineData;
	int iLineNumber;
	int x, y;
	int iStartPos;

	PWindowsTree pWin;
	pWin = (PWindowsTree)hWnd;

	pEditData = (PMLEditData)pWin->dwData;

	iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
	if(!edtGetBoxTopLineInfo(pEditData,&pLineData,&iStartPos))
		return false;
	if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
		return false;

	pEditData->iCaretXPos = strlen(pStrDisp);

	edtSetEditPos(hWnd);
	edtCalCaretPos(hWnd,&x,&y);
	SetCaretPos(hWnd,x,y);


	return true;
}
//====================  LEFT ========================
static BOOL
edtScanCodeLeft(
	HWND hWnd
)
{
	char pStrDisp[LEN_MLEDIT_LINEBUFFER];
	int x, y;
	PMLEditData pEditData;
	PLineData pLineData;
	int iStartPos, iLineNumber;
	BOOL bScroll;

	PWindowsTree pWin;
	pWin = (PWindowsTree)hWnd;


	bScroll = false;

	pEditData = (PMLEditData)pWin->dwData;
	if(!pEditData)
		return false;

	//get string
	if(!edtGetBoxTopLineInfo(pEditData,&pLineData, &iStartPos))
		return false;
	iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
	if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
		return false;

	if(pEditData->iCaretXPos != 0){
		if(edtIsACCharBeforePos(pStrDisp + pEditData->iCaretXPos))
			pEditData->iCaretXPos -= 2;
		else
			pEditData->iCaretXPos -= 1;
	}
	else{//have to move caret to the previous line
		if(iLineNumber == pEditData->iDispPos){//caret at top line of the editbox
			if(pEditData->iDispPos == 0)
				return true;
			else{
				pEditData->iDispPos -- ;
				if(!edtGetBoxTopLineInfo(pEditData, &pLineData, &iStartPos))
					return false;
				iLineNumber = pEditData->iDispPos;
				if(!edtGetDispString(&pLineData, iLineNumber, pStrDisp))
					return false;
				pEditData->iCaretXPos = strlen(pStrDisp);
				bScroll = true;
			}
		}
		else{//caret not at top line of the editbox
			pEditData->iCaretYPos -- ;
			//if(!edtGetBoxTopLineInfo(pEditData,&pLineData,&iStartPos))
			//	return false;
			iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
			if(!edtGetDispString(&pLineData, iLineNumber, pStrDisp))
				return false;
			pEditData->iCaretXPos = strlen(pStrDisp);

		}
	}
	if(bScroll){
		edtReCalTopLine(hWnd);
		edtSetVScrollInfo(hWnd, pEditData, true);
		InvalidateRect(hWnd,NULL,true);
	}
	edtSetEditPos(hWnd);
	edtCalCaretPos(hWnd,&x,&y);
	SetCaretPos(hWnd,x,y);
	return true;
}

//====================  RIGHT========================
static BOOL
edtScanCodeRight(
	HWND hWnd
)
{
	int x,y;
	char pStrDisp[LEN_MLEDIT_LINEBUFFER];
	PMLEditData pEditData;
	PLineData pLineData;
	int iStartPos;
	int iLineNumber;

	PWindowsTree pWin;
	pWin = (PWindowsTree)hWnd;

	BOOL bScroll;

	bScroll = false;

	pEditData = (PMLEditData)(pWin->dwData);
	if(!pEditData)
		return false;
	//get string
	if(!edtGetBoxTopLineInfo(pEditData,&pLineData, &iStartPos))
		return false;
	iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
	if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
		return false;
	
	if(pEditData->iCaretXPos == (int)strlen(pStrDisp)){//move to next line
		if(pEditData->iDispPos + pEditData->iCaretYPos + 1 >= pEditData->iTotalLines)
			return true;//already at the end
		else{
			pEditData->iCaretXPos = 0;
			if(pEditData->iCaretYPos + 2 > pEditData->iDispLines){
				//pEditData->iCaretYPos += 1; //don't increase the value of caret y pos 
				pEditData->iDispPos += 1;
				bScroll = true;
			}
			else
				pEditData->iCaretYPos += 1; 
		}
	}
	else{
		if(edtIsACChar(pEditData->pEditPos))
			pEditData->iCaretXPos += 2;
		else
			pEditData->iCaretXPos += 1;
	}
	if(bScroll){
		edtReCalTopLine(hWnd);
		edtSetVScrollInfo(hWnd, pEditData, true);
		InvalidateRect(hWnd,NULL,true);
	}

	edtSetEditPos(hWnd);
	edtCalCaretPos(hWnd,&x,&y);
	SetCaretPos(hWnd,x,y);


	return true;
}


static BOOL
edtReCalCaretXPos(
	PMLEditData pEditData,
	int iPrevCaretYPos,
	int *px
)
{
	char pStrDisp[LEN_MLEDIT_LINEBUFFER];
	int iLineNumber, iStartPos;
	PLineData pLineData;
	int iCharNumber, iByteNumber;
	int x;
	//get string
	if(!edtGetBoxTopLineInfo(pEditData,&pLineData, &iStartPos))
		return false;
	iLineNumber = pEditData->iDispPos + iPrevCaretYPos;
	if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
		return false;
	//Get character number 
	iCharNumber = iByteNumber = 0;
	while(iByteNumber < pEditData->iCaretXPos){
		if(edtIsACChar(pStrDisp + iCharNumber))
			iByteNumber += 2;
		else
			iByteNumber += 1;
		iCharNumber += 1;
	}
	iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
	if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
		return false;
	
	x = iByteNumber = 0;
	while(x < iCharNumber){
		if(!*(pStrDisp + iByteNumber))
			break;
		if(edtIsACChar(pStrDisp + iByteNumber))
			iByteNumber += 2;
		else
			iByteNumber += 1;
		x += 1;
	}
	*px = iByteNumber;
	return true;
}


static BOOL
edtReCalCaretXPosNoRef(
	PMLEditData pEditData,
	int *px
)
{
	char pStrDisp[LEN_MLEDIT_LINEBUFFER];
	int iLineNumber, iStartPos;
	PLineData pLineData;
	int x;
	//get string
	if(!edtGetBoxTopLineInfo(pEditData,&pLineData, &iStartPos))
		return false;
	iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
	if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
		return false;
	x = 0;
	while(x < pEditData->iCaretXPos){
		if(!*(pStrDisp + x))
			break;
		if(edtIsACChar(pStrDisp + x))
			x += 2;
		else
			x += 1;
	}
	*px = x;
	return true;
}
//====================  UP ========================
static BOOL
edtScanCodeUp(
	HWND hWnd
)
{
	int x,y;
	PMLEditData pEditData;



	PWindowsTree pWin;
	pWin = (PWindowsTree)hWnd;

	BOOL bScroll;

	bScroll = false;

	pEditData = (PMLEditData)(pWin->dwData);
	if(!pEditData)
		return false;

	if(pEditData->iCaretYPos == 0){//at top line of edit box
		if(pEditData->iDispPos == 0)
			return true;
		else{
			pEditData->iDispPos -- ;
			bScroll = true;
		}
	}
	else{
		pEditData->iCaretYPos -- ;
	}

	//recalculate caret x position 
	if(!edtReCalCaretXPos(pEditData, pEditData->iCaretYPos + 1, &x))
		return false;
	pEditData->iCaretXPos = x;
	

	if(bScroll){
		edtReCalTopLine(hWnd);
		edtSetVScrollInfo(hWnd, pEditData, true);
		InvalidateRect(hWnd,NULL,true);
	}

	edtSetEditPos(hWnd);
	edtCalCaretPos(hWnd,&x,&y);
	SetCaretPos(hWnd,x,y);

	return true;
}


//====================  Down ========================
static BOOL
edtScanCodeDown(
	HWND hWnd
)
{
	int x,y;
	PMLEditData pEditData;



	PWindowsTree pWin;
	pWin = (PWindowsTree)hWnd;

	BOOL bScroll;

	bScroll = false;

	pEditData = (PMLEditData)(pWin->dwData);
	if(!pEditData)
		return false;

	if(pEditData->iCaretYPos + 2 > pEditData->iDispLines){//caret at bottom of the edit box

		if(pEditData->iDispPos + pEditData->iCaretYPos + 1 >= pEditData->iTotalLines)
			return true;//already at the end
		else{
			pEditData->iDispPos += 1;
			bScroll = true;
		}
	}
	else{//caret not at bottom of the edit box
		pEditData->iCaretYPos += 1;
	}

	//recalculate caret x position 
	if(!edtReCalCaretXPos(pEditData, pEditData->iCaretYPos - 1, &x))
		return false;
	pEditData->iCaretXPos = x;

	

	if(bScroll){
		edtReCalTopLine(hWnd);
		edtSetVScrollInfo(hWnd, pEditData, true);
		InvalidateRect(hWnd,NULL,true);
	}

	edtSetEditPos(hWnd);
	edtCalCaretPos(hWnd,&x,&y);
	SetCaretPos(hWnd,x,y);

	return true;
}



//====================  Ins ========================
static BOOL
edtScanCodeIns(
	HWND hWnd
)
{
	PMLEditData pEditData;

	PWindowsTree pWin;
	pWin = (PWindowsTree)hWnd;


	pEditData = (PMLEditData)pWin->dwData;
	if(!pEditData)
		return false;
	pEditData->dwStatus ^= EST_REPLACE;
	return true;
}





static BOOL
edtReIndexDataAfterDelWrapLine(
	PMLEditData pEditData,
	PLineData pCurLineData
)
{

	pCurLineData->iWrapLineNumber -= 1;
	pCurLineData->WrapStartPos[pCurLineData->iWrapLineNumber] = 0;

	pEditData->iTotalLines -= 1;
	pCurLineData = pCurLineData->pNext;
	while(pCurLineData){
		pCurLineData->iLineNumber -= 1;
		pCurLineData = pCurLineData->pNext;
	}

	return true;
}

static BOOL
edtReIndexDataAfterDelChar(
	PMLEditData pEditData, 
	PLineData pCurLineData
)
{
	PLineData pLineData;
	int iWrapLines;
	char* pLine;
	int iChars, iPos;
	int iDecrease;

	pLine = pCurLineData->pString;
	iChars = 0;
	iWrapLines = 0;
	iPos = 0;
	while(*pLine){
		if(edtIsACChar(pLine)){
			iChars += 2;
			if(iChars > pEditData->iDispChars){
				pCurLineData->WrapStartPos[iWrapLines] = iPos;
				iWrapLines ++;
				iChars = 2;
			}
			iPos += 2;
			pLine += 2;	
		}
		else {
			iChars += 1;
			if(iChars > pEditData->iDispChars){
				pCurLineData->WrapStartPos[iWrapLines] = iPos;
				iWrapLines ++;
				iChars = 1;
			}
			iPos += 1;
			pLine += 1;
		}
	}
	if(iWrapLines != pCurLineData->iWrapLineNumber){
		iDecrease = pCurLineData->iWrapLineNumber - iWrapLines;
		pCurLineData->iWrapLineNumber = iWrapLines;
		pLineData = pCurLineData->pNext;
		while(pLineData){
			pLineData->iLineNumber -= iDecrease;
			pLineData = pLineData->pNext;
		}
		pEditData->iTotalLines -= iDecrease;
	}
	
	return true;
}

//recalculate pCurLineData line wrap position
//and recode the line number
static BOOL
edtReIndexDataAfterDelLine(
	PMLEditData pEditData,
	PLineData pCurLineData
)
{
	PLineData pLineData;
	int iChars, iWrapLines, iPos;
	char* pLine;
	int iDecrease;

	//recalculate pCurLinedata line wrap position
	pLine = pCurLineData->pString;
	iChars = 0;
	iWrapLines = 0;
	iPos = 0;
	while(*pLine){
		if(edtIsACChar(pLine)){
			iChars += 2;
			if(iChars > pEditData->iDispChars){
				pCurLineData->WrapStartPos[iWrapLines] = iPos;
				iWrapLines ++;
				iChars = 2;
			}
			iPos += 2;
			pLine += 2;	
		}
		else {
			iChars += 1;
			if(iChars > pEditData->iDispChars){
				pCurLineData->WrapStartPos[iWrapLines] = iPos;
				iWrapLines ++;
				iChars = 1;
			}
			iPos += 1;
			pLine += 1;
		}
	}
	pCurLineData->iWrapLineNumber = iWrapLines;

	pLineData = pCurLineData->pNext;
	if(!pLineData){
		pEditData->iTotalLines = pCurLineData->iLineNumber 
			+ pCurLineData->iWrapLineNumber + 1;
		return true;
	}

	iDecrease = pLineData->iLineNumber - 
		(pCurLineData->iLineNumber + pCurLineData->iWrapLineNumber + 1);
	if(!iDecrease)
		return true;

	while(pLineData){
		pLineData->iLineNumber -= iDecrease;
		pLineData = pLineData->pNext;
	}
	
	pEditData->iTotalLines -= iDecrease;

	return true;
}



static BOOL
edtCombineAdjLine(
	PMLEditData pEditData,
	PLineData pLineData
)
{
	PLineData pNextLineData;
	
	pNextLineData = pLineData->pNext;
	if(!pNextLineData)
		return false;
	if(pNextLineData->pNext){//pNextLineData is not the end of the link table
		pLineData->pNext = pNextLineData->pNext;
		pNextLineData->pNext->pPrev = pLineData;
	}
	else{//pNextLineData is at the end of the link table
		pLineData->pNext = NULL;
	}
	strcat(pLineData->pString, pNextLineData->pString);
	free(pNextLineData);
	
	edtReIndexDataAfterDelLine(pEditData,pLineData);
		
	return true;
}


//====================  Del ========================
static BOOL
edtScanCodeDel(
	HWND hWnd
)
{
	int iStartPos;
	char pStrDisp[LEN_MLEDIT_LINEBUFFER];
	char* pString;
	int iLineNumber, iLen;
	int x, y;
	int iWinHeight, iWinWidth;
	RECT rtInvalid;
	PMLEditData pEditData;
	PLineData pLineData, pPrevLineData;

	PWindowsTree pWin;
	pWin = (PWindowsTree)hWnd;

	BOOL bChange;
	BOOL bScroll;

	bChange = false;
	bScroll = false;

	pEditData = (PMLEditData)(pWin->dwData);
	if(!pEditData)
		return false;

	if(!edtGetCurLineData(pEditData,&pLineData))
		return false;
	if(edtIsCaretAtLineEnd(pEditData)){
		if(!pLineData->pNext){//at the end of all text
			if(strlen(pLineData->pString)==0){
				//if it's not the last left line, remove it
				pPrevLineData = pLineData->pPrev;
				if(pPrevLineData){
					if(pEditData->pDispPointer == pLineData)
						pEditData->pDispPointer = pPrevLineData;
					pPrevLineData->pNext = NULL;
					free(pLineData);
					pLineData = NULL;
					pEditData->iTotalLines -= 1;
					
				}
				//process caret position
				if(pEditData->iCaretYPos){
					pEditData->iCaretYPos -= 1;
					if(!edtGetBoxTopLineInfo(pEditData,&pLineData,&iStartPos))
						return false;
					iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
					if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
						return false;
					pEditData->iCaretXPos = strlen(pStrDisp);
				}
				else{//caret at top line of the box
					if(pEditData->iDispPos){
						pEditData->iDispPos --;
						bScroll = true;
						if(!edtGetBoxTopLineInfo(pEditData,&pLineData,&iStartPos))
							return false;
						iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
						if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
							return false;
						pEditData->iCaretXPos = strlen(pStrDisp);
					}
					else{//this is the last left line.
						//no action
					}
				}
			}
		}
		else{//not at the end of all text
			//combine the next line to the current line 
			edtCombineAdjLine(pEditData, pLineData);
		}
	}
	else{//not at line end 
		//delete a character at current position
		pString = pEditData->pEditPos;
		if(edtIsACChar(pString))
			iLen = 2;
		else
			iLen = 1;
		while(1){
			*pString = *(pString+iLen);
			if(!*(pString+iLen))
				break;
			pString ++;
		}

		pEditData->iTotalLen -= iLen;

		iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
		if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))
			return false;
		if(strlen(pStrDisp) == 0){
			if((pEditData->iDispPos + pEditData->iCaretYPos + 1	== pEditData->iTotalLines)
				&& (strlen(pLineData->pString) !=0 )){//for caret y pos beyond the text content scale
				//move caret to end of upper line
				//but if current pLineData is empty after del this character,
				//reserver this empty line and do not move caret to the upper line
				if(pEditData->iCaretYPos){
					pEditData->iCaretYPos --;
				}
				else if(pEditData->iDispPos){
					pEditData->iDispPos -= 1;
					bScroll = true;
				}
				iLineNumber = pEditData->iDispPos + pEditData->iCaretYPos;
				if(!edtGetBoxTopLineInfo(pEditData,&pLineData,&iStartPos))
					return false;
				if(!edtGetDispString(&pLineData,iLineNumber,pStrDisp))