crystaltextblock.cpp

一个完整的编辑器的代码（很值得参考

////////////////////////////////////////////////////////////////////////////
//	File:		CrystalTextBlock.cpp
//
//	Author:		Sven Wiegand
//	E-mail:		[e-mail]
//
//	Implementation of the CCrystalTextBufferEx class, a part of Crystal Edit -
//	syntax coloring text editor.
//
//	You are free to use or modify this code to the following restrictions:
//	- Acknowledge me somewhere in your about box, simple "Parts of code by.."
//	will be enough. If you can't (or don't want to), contact me personally.
//	- LEAVE THIS HEADER INTACT
////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "CrystalTextBlock.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

CCrystalTextBlock::CCrystalTextBlock( TEXTBLOCK *pTextBlock, int &rnActualItems )
: m_rnActualItems( rnActualItems )
{
	ASSERT( pTextBlock );
	m_pTextBlock = pTextBlock;
}


BOOL CCrystalTextBlock::Add( int nCharPos, int nColorIndex )
{
	// insert new text block sorted by character position
	for( int i = 0; i < m_rnActualItems && m_pTextBlock[i].m_nCharPos < nCharPos; i++ );

	// insert text block
	if( i < m_rnActualItems )
	{
		// if new character position allready exists, the replace old one
		if( m_pTextBlock[i].m_nCharPos == nCharPos )
		{
			m_pTextBlock[i].m_nCharPos = nCharPos;
			m_pTextBlock[i].m_nColorIndex = nColorIndex;
		}
		else
		{
			for( int j = ++m_rnActualItems - 1; j > i; j-- )
			{
				m_pTextBlock[j].m_nCharPos = m_pTextBlock[j - 1].m_nCharPos;
				m_pTextBlock[j].m_nColorIndex = m_pTextBlock[j - 1].m_nColorIndex;
			}
			m_pTextBlock[i].m_nCharPos = nCharPos;
			m_pTextBlock[i].m_nColorIndex = nColorIndex;
		}
	}
	else
	{
		// add text block to end of array
		m_pTextBlock[m_rnActualItems].m_nCharPos = nCharPos;
		m_pTextBlock[m_rnActualItems++].m_nColorIndex = nColorIndex;
	}

	return TRUE;
}