cviewbinary.cpp

一个Symbain 文本编辑器

/*
 * HView [c]2004 Marcin Skoczylas, All rights reserved
 *
 * This file is under GPL license, see gpl.txt file
 *
 */

#include "SymDefs.h"
#include "CViewBinary.h"

CViewBinary::CViewBinary(CHVContainer *iContainer)
{
	this->iContainer=iContainer;
	hexTable = "0123456789abcdef";


}

CViewBinary::~CViewBinary()
{

}

void CViewBinary::SetupArrays(TInt filePos)
{
	char *buf;
	// prepare binary arrays
	int xNumbers, xAscii, y;

	iContainer->numCharsX = 0;	// number of ascii (not binary doubles: 00) chars per row
	iContainer->numCharsY = iContainer->screenRect.Height() / HVFONT_HEIGHT;
	// calc num bin numbers

	xAscii = iContainer->screenRect.Width();
	for (xNumbers = 0; xNumbers < (xAscii-3); )
	{
		xNumbers += (int)(HVFONT_WIDTH*2+HVFONT_BINSPACE_WIDTH);
		xAscii -= HVFONT_WIDTH;
		iContainer->numCharsX++;
	}
	iContainer->numCharsX--;

	xAscii = binaryAsciiStartX = iContainer->screenRect.Width()-(iContainer->numCharsX*HVFONT_WIDTH);

	LOGF("preparing char arrays for bin view: numCharsX=%d numCharsY=%d\n", iContainer->numCharsX, iContainer->numCharsY);
	// binary
	// prepare the char arrays knowing the screen and font size
	// filePosArray not needed: filePos of the line = (global filePos) * numCharX
	binaryFilePos = filePos;

	iContainer->appUi->fileLoader->Seek(binaryFilePos);

	//LOGF("setuparrays - !charsArray?\n");
	if (!iContainer->charsArray)
	{
		iContainer->charsArray = new char* [iContainer->numCharsY];
		for (y = 0; y < iContainer->numCharsY; y++)
		{
			iContainer->charsArray[y] = NULL;
		}
	}
	
	for (y = 0; y < iContainer->numCharsY; y++)
	{
		buf = new char[iContainer->numCharsX+1];		//DEBUG!!!
		buf[iContainer->numCharsX-1] = 0x00;

		iContainer->appUi->fileLoader->Read(buf, iContainer->numCharsX);
		
		if (iContainer->charsArray[y])
			delete iContainer->charsArray[y];

		iContainer->charsArray[y] = buf;
	}
}

void CViewBinary::DrawWholeBackBuffer()
{
	int xNumbers, i, j, filePos, maxY;
	
	// line is darker
	iContainer->backBufferGc->SetPenStyle(CGraphicsContext::EDottedPen);
	iContainer->backBufferGc->SetPenSize(TSize(1,1));
	iContainer->backBufferGc->SetPenColor(TRgb(LINE_COLORR, LINE_COLORG, LINE_COLORB));

	filePos = binaryFilePos;

	maxY = 0;
	// draw ascii 
	for (i = 0; i < iContainer->numCharsY; i++)
	{
		for (j = 0; j < iContainer->numCharsX; j++)
		{
			if (filePos < iContainer->appUi->fileLoader->fileSize)
			{
				iContainer->backBufferGc->BitBlt(
					TPoint(j * HVFONT_WIDTH + binaryAsciiStartX, i*HVFONT_HEIGHT), 
					iContainer->fontBitmap, 
					iContainer->GetFontRectByChar((unsigned int)iContainer->charsArray[i][j]));

				maxY = i;
			}
			filePos++;
			
		}
	}
	maxY++;

	filePos = binaryFilePos;
	
	// draw hex
	for (i = 0; i < iContainer->numCharsY; i++)
	{
		xNumbers = 0;
		for (j = 0; j < iContainer->numCharsX; j++)
		{
			if (filePos < iContainer->appUi->fileLoader->fileSize)
			{
				unsigned char c1;
				unsigned char c2;
				unsigned char c=(unsigned char)iContainer->charsArray[i][j];

				c1 = (unsigned char)(c & 0xF0);
				c1 = (unsigned char)(c >> 4);

				c2 = (unsigned char)(c & 0x0F);

				c1 = (unsigned char)hexTable[c1];
				c2 = (unsigned char)hexTable[c2];

				iContainer->backBufferGc->BitBlt(
					TPoint(xNumbers, i * HVFONT_HEIGHT), 
					iContainer->fontBitmap, 
					iContainer->GetFontRectByChar(c1));
				xNumbers += HVFONT_WIDTH;
				iContainer->backBufferGc->BitBlt(
					TPoint(xNumbers, i * HVFONT_HEIGHT), 
					iContainer->fontBitmap, 
					iContainer->GetFontRectByChar((unsigned int)c2));
				
				xNumbers += (int)(HVFONT_WIDTH + HVFONT_BINSPACE_WIDTH);
				filePos++;
			}

		}
	}
	//draw grid
	for (j = 0; j < iContainer->numCharsX; j++)
	{
		iContainer->backBufferGc->DrawLine(
			TPoint((j * ((HVFONT_WIDTH*2+HVFONT_BINSPACE_WIDTH)) - HVFONT_BINSPACE_WIDTH/2-1), 
					0), 
			TPoint((j * ((HVFONT_WIDTH*2+HVFONT_BINSPACE_WIDTH)) - HVFONT_BINSPACE_WIDTH/2-1), 
					(maxY)*HVFONT_HEIGHT));
	}
	

}

void CViewBinary::ScrollRight()
{
	if (binaryFilePos < (iContainer->appUi->fileLoader->fileSize-1))
	{
		SetupArrays(binaryFilePos+1);
		iContainer->DrawWholeBackBuffer();
		iContainer->DrawNow();
	}	
}

void CViewBinary::ScrollLeft()
{
	if (binaryFilePos > 0)
	{
		SetupArrays(binaryFilePos-1);
		iContainer->DrawWholeBackBuffer();
		iContainer->DrawNow();
	}
}

void CViewBinary::ScrollPageDown()
{
	for (int i = 0; i < iContainer->numCharsY; i++)
	{
		ScrollDown(false);
	}
	iContainer->DrawWholeBackBuffer();
	iContainer->DrawNow();
}

void CViewBinary::ScrollPageUp()
{
	for (int i = 0; i < iContainer->numCharsY; i++)
	{
		ScrollUp(false);
	}
	iContainer->DrawWholeBackBuffer();
	iContainer->DrawNow();
}

void CViewBinary::ScrollDown(bool draw)
{
	int y;

	// binary
	// already at end of file?
	
	int nextLineFilePos = binaryFilePos+iContainer->numCharsY*iContainer->numCharsX;
	int numCharsToRead;

	if (nextLineFilePos >= iContainer->appUi->fileLoader->fileSize)
	{
		return;
	}

	delete [] iContainer->charsArray[0];

	// scroll arrays
	for (y = 1; y < iContainer->numCharsY; y++)
	{
		iContainer->charsArray[y-1] = iContainer->charsArray[y];
	}

	iContainer->charsArray[iContainer->numCharsY-1] = new char[iContainer->numCharsX+1];		//DEBUG!!!!!!
	iContainer->charsArray[iContainer->numCharsY-1][iContainer->numCharsX-1] = 0x00;

	iContainer->appUi->fileLoader->Seek(nextLineFilePos);

	// check end of file
	if (nextLineFilePos + iContainer->numCharsX > iContainer->appUi->fileLoader->fileSize)
	{
		numCharsToRead = iContainer->appUi->fileLoader->fileSize - nextLineFilePos;
	}
	else
	{
		numCharsToRead = iContainer->numCharsX;
	}
	iContainer->appUi->fileLoader->Read(iContainer->charsArray[iContainer->numCharsY-1], numCharsToRead);
	//LOGF("line readed: '%s' pos=%d next=%d\n", charsArray[numCharsY-1], filePosArray[numCharsY-1], afterLastLinePos);

	binaryFilePos += iContainer->numCharsX;

	if (!draw)
		return;

	// move lines up, starting on second line (bitmap copy from backbuffer)
	TRect src(0, HVFONT_HEIGHT, iContainer->screenRect.Width(), iContainer->numCharsY * HVFONT_HEIGHT);
	iContainer->backBufferGc2->BitBlt(TPoint(0, 0), iContainer->backBuffer, src);

	// clear last line
	iContainer->backBufferGc2->SetPenStyle(CGraphicsContext::ENullPen);
	iContainer->backBufferGc2->SetBrushColor(TRgb(149, 149, 239));
	iContainer->backBufferGc2->SetBrushStyle(CGraphicsContext::ESolidBrush);
	iContainer->backBufferGc2->DrawRect(
		TRect(0, 
			(iContainer->numCharsY-1) * HVFONT_HEIGHT, 
			iContainer->screenRect.Width(), 
			iContainer->numCharsY * HVFONT_HEIGHT));

	// draw last line
	int xNumbers, j; 
	
	// line is darker
	iContainer->backBufferGc2->SetPenStyle(CGraphicsContext::EDottedPen);
	iContainer->backBufferGc2->SetPenSize(TSize(1,1));
	iContainer->backBufferGc2->SetPenColor(TRgb(LINE_COLORR, LINE_COLORG, LINE_COLORB));

	// draw ascii 
	for (j = 0; j < numCharsToRead; j++)
	{
		iContainer->backBufferGc2->BitBlt(
			TPoint(j * HVFONT_WIDTH + binaryAsciiStartX, (iContainer->numCharsY-1)*HVFONT_HEIGHT), 
			iContainer->fontBitmap, 
			iContainer->GetFontRectByChar((unsigned int)iContainer->charsArray[iContainer->numCharsY-1][j]));
		
	}
	
	// draw hex
	xNumbers = 0;
	for (j = 0; j < numCharsToRead; j++)
	{
		unsigned char c1;
		unsigned char c2;
		unsigned char c=(unsigned char)iContainer->charsArray[iContainer->numCharsY-1][j];

		c1 = (unsigned char)(c & 0xF0);
		c1 = (unsigned char)(c >> 4);

		c2 = (unsigned char)(c & 0x0F);

		c1 = (unsigned char)hexTable[c1];
		c2 = (unsigned char)hexTable[c2];

		iContainer->backBufferGc2->BitBlt(
			TPoint(xNumbers, (iContainer->numCharsY-1) * HVFONT_HEIGHT), 
			iContainer->fontBitmap, 
			iContainer->GetFontRectByChar(c1));
		xNumbers += HVFONT_WIDTH;
		iContainer->backBufferGc2->BitBlt(
			TPoint(xNumbers, (iContainer->numCharsY-1) * HVFONT_HEIGHT), 
			iContainer->fontBitmap, 
			iContainer->GetFontRectByChar((unsigned int)c2));
		
		xNumbers += (int)(HVFONT_WIDTH + HVFONT_BINSPACE_WIDTH);

	}
	//draw grid
	for (j = 0; j < numCharsToRead; j++)
	{
		iContainer->backBufferGc2->DrawLine(
			TPoint((j * ((HVFONT_WIDTH*2+HVFONT_BINSPACE_WIDTH)) - HVFONT_BINSPACE_WIDTH/2-1), 
					(iContainer->numCharsY-1)*HVFONT_HEIGHT), 
			TPoint((j * ((HVFONT_WIDTH*2+HVFONT_BINSPACE_WIDTH)) - HVFONT_BINSPACE_WIDTH/2-1), 
					(iContainer->numCharsY)*HVFONT_HEIGHT));
	}
	

	iContainer->backBufferGc->BitBlt(TPoint(0, 0), iContainer->backBuffer2);
	
	iContainer->DrawNow();
}

void CViewBinary::ScrollUp(bool draw)
{
	// binary
	int y, x;

	if (binaryFilePos == 0)
	{
		LOGF("scrollup: already at beginning of file\n");
		return;
	}
	LOGF("bin scrollup: pos %d -> %d\n", binaryFilePos, binaryFilePos-iContainer->numCharsX);
	binaryFilePos -= iContainer->numCharsX;

	if (binaryFilePos < 0)
	{
		binaryFilePos = 0;
		LOGF("setup arrays\n");
		SetupArrays(0);
		DrawWholeBackBuffer();
		iContainer->DrawNow();
		return;
	}

	delete [] iContainer->charsArray[iContainer->numCharsY-1];

	for (y = (iContainer->numCharsY-2); y > -1; y--)
	{
		iContainer->charsArray[y+1] = iContainer->charsArray[y];
	}

	iContainer->charsArray[0] = new char[iContainer->numCharsX+1];		//DEBUG!!!!!!
	iContainer->charsArray[0][iContainer->numCharsX-1] = 0x00;
	iContainer->appUi->fileLoader->Seek(binaryFilePos);
	iContainer->appUi->fileLoader->Read(iContainer->charsArray[0], iContainer->numCharsX);
	//LOGF("line readed: '%s' pos=%d next=%d\n", charsArray[numCharsY-1], filePosArray[numCharsY-1], afterLastLinePos);


	if (!draw)
		return;

	// move lines down, starting on previous before last line (bitmap copy from backbuffer)
	TRect src(0, 0, iContainer->screenRect.Width(), (iContainer->numCharsY-1) * HVFONT_HEIGHT);
	iContainer->backBufferGc2->BitBlt(TPoint(0, HVFONT_HEIGHT), iContainer->backBuffer, src);

	// clear first line
	iContainer->backBufferGc2->SetPenStyle(CGraphicsContext::ENullPen);
	iContainer->backBufferGc2->SetBrushColor(TRgb(149, 149, 239));
	iContainer->backBufferGc2->SetBrushStyle(CGraphicsContext::ESolidBrush);
	iContainer->backBufferGc2->DrawRect(TRect(0, 0, iContainer->numCharsX * HVFONT_WIDTH, HVFONT_HEIGHT));

	// draw first line
	for (x = 0; x < iContainer->numCharsX; x++)
	{
		// draw first line
		int xNumbers, j; 
		
		// line is darker
		iContainer->backBufferGc2->SetPenStyle(CGraphicsContext::EDottedPen);
		iContainer->backBufferGc2->SetPenSize(TSize(1,1));
		iContainer->backBufferGc2->SetPenColor(TRgb(LINE_COLORR, LINE_COLORG, LINE_COLORB));

		//draw grid
		for (j = 0; j < iContainer->numCharsX; j++)
		{
			iContainer->backBufferGc2->DrawLine(
				TPoint((j * ((HVFONT_WIDTH*2+HVFONT_BINSPACE_WIDTH)) - HVFONT_BINSPACE_WIDTH/2-1), 
						0), 
				TPoint((j * ((HVFONT_WIDTH*2+HVFONT_BINSPACE_WIDTH)) - HVFONT_BINSPACE_WIDTH/2-1), 
						HVFONT_HEIGHT));
		}
		
		// draw ascii 
		for (j = 0; j < iContainer->numCharsX; j++)
		{
			iContainer->backBufferGc2->BitBlt(
				TPoint(j * HVFONT_WIDTH + binaryAsciiStartX, 0), 
				iContainer->fontBitmap, 
				iContainer->GetFontRectByChar((unsigned int)iContainer->charsArray[0][j]));
			
		}
		
		// draw hex
		xNumbers = 0;
		for (j = 0; j < iContainer->numCharsX; j++)
		{
			unsigned char c1;
			unsigned char c2;
			unsigned char c=(unsigned char)iContainer->charsArray[0][j];

			c1 = (unsigned char)(c & 0xF0);
			c1 = (unsigned char)(c >> 4);

			c2 = (unsigned char)(c & 0x0F);

			c1 = (unsigned char)hexTable[c1];
			c2 = (unsigned char)hexTable[c2];

			iContainer->backBufferGc2->BitBlt(
				TPoint(xNumbers, 0), 
				iContainer->fontBitmap, 
				iContainer->GetFontRectByChar(c1));
			xNumbers += HVFONT_WIDTH;
			iContainer->backBufferGc2->BitBlt(
				TPoint(xNumbers, 0), 
				iContainer->fontBitmap, 
				iContainer->GetFontRectByChar((unsigned int)c2));
			
			xNumbers += (int)(HVFONT_WIDTH + HVFONT_BINSPACE_WIDTH);

		}

	}
		
	iContainer->backBufferGc->BitBlt(TPoint(0, 0), iContainer->backBuffer2);
	
	iContainer->DrawNow();
	return;
}