gui__wrap.c

MCB2300_ucgui_LCD320240.rar LPC2368的uc/gui的移植

/*
*********************************************************************************************************
*   											 uC/GUI
*   					 Universal graphic software for embedded applications
*
*   					(c) Copyright 2002, Micrium Inc., Weston, FL
*   					(c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*   		   礐/GUI is protected by international copyright laws. Knowledge of the
*   		   source code may not be used to write a similar product. This file may
*   		   only be used in accordance with a license and should not be redistributed
*   		   in any way. We appreciate your understanding and fairness.
*
----------------------------------------------------------------------
File		: GUI__WRAP.c
Purpose 	: Implementation of wrap routines
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Protected.h"

/*********************************************************************
*
*   	static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_IsLineEnd
*/
static int _IsLineEnd(U16 Char)
{
	if (!Char || (Char == '\n'))
	{
		return 1;
	}
	return 0;
}

/*********************************************************************
*
*   	_GetWordWrap
*/
static int _GetWordWrap(const char GUI_UNI_PTR *s, int xSize)
{
	int xDist = 0, NumChars = 0, WordWrap = 0;
	U16 Char, PrevChar = 0;
	while (1)
	{
		Char = GUI_UC__GetCharCodeInc(&s);   /* Similar to:  *s++ */
		/* Let's first check if the line end is reached. In this case we are done. */
		if (_IsLineEnd(Char))
		{
			WordWrap = NumChars;
			break;
		}
		/* If current character is a space, we found a wrap position */
		if ((Char == ' ') && (Char != PrevChar))
		{
			WordWrap = NumChars;
		}
		PrevChar = Char;
		xDist += GUI_GetCharDistX(Char);
		if ((xDist <= xSize) || (NumChars == 0))
		{
			NumChars++;
		}
		else
		{
			break;
		}
	}
	if (!WordWrap)
	{
		WordWrap = NumChars;
	}
	return WordWrap;
}

/*********************************************************************
*
*   	_GetCharWrap
*/
static int _GetCharWrap(const char GUI_UNI_PTR *s, int xSize)
{
	int xDist = 0, NumChars = 0;
	U16 Char;
	while ((Char = GUI_UC__GetCharCodeInc(&s)) != 0)
	{
		xDist += GUI_GetCharDistX(Char);
		if ((NumChars && (xDist > xSize)) || (Char == '\n'))
		{
			break;
		}
		NumChars++;
	}
	return NumChars;
}

/*********************************************************************
*
*   	_GetNoWrap
*/
static int _GetNoWrap(const char GUI_UNI_PTR *s)
{
	return GUI__GetLineNumChars(s, 0x7FFF);
}

/*********************************************************************
*
*   	puplic code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI__WrapGetNumCharsDisp
*
* Returns:
*  Number of characters to display in the line.
*  Trailing spaces and line end character are
*  not counted
*/
int GUI__WrapGetNumCharsDisp(const char GUI_UNI_PTR *pText, int xSize, GUI_WRAPMODE WrapMode)
{
	int r;
	switch (WrapMode)
	{
		case GUI_WRAPMODE_WORD:
			r = _GetWordWrap(pText, xSize);
			break;
		case GUI_WRAPMODE_CHAR:
			r = _GetCharWrap(pText, xSize);
			break;
		default:
			r = _GetNoWrap(pText);
	}
	return r;
}

/*********************************************************************
*
*   	GUI__WrapGetNumCharsToNextLine
*/
int GUI__WrapGetNumCharsToNextLine(const char GUI_UNI_PTR *pText, int xSize, GUI_WRAPMODE WrapMode)
{
	int NumChars;
	U16 Char;
	NumChars = GUI__WrapGetNumCharsDisp(pText, xSize, WrapMode);
	pText += GUI_UC__NumChars2NumBytes(pText, NumChars);
	Char = GUI_UC__GetCharCodeInc(&pText);
	if (Char == '\n')
	{
		NumChars++;
	}
	else
	{
		if (WrapMode == GUI_WRAPMODE_WORD)
		{
			while (Char == ' ')
			{
				NumChars++;
				Char = GUI_UC__GetCharCodeInc(&pText);
			}
		}
	}
	return NumChars;
}

/*********************************************************************
*
*   	GUI__WrapGetNumBytesToNextLine
*/
int GUI__WrapGetNumBytesToNextLine(const char GUI_UNI_PTR *pText, int xSize, GUI_WRAPMODE WrapMode)
{
	int NumChars, NumBytes;
	NumChars = GUI__WrapGetNumCharsToNextLine(pText, xSize, WrapMode);
	NumBytes = GUI_UC__NumChars2NumBytes(pText, NumChars);
	return NumBytes;
}

/*************************** End of file ****************************/