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【C】浏览当前磁盘文件
作者:qianger / 发布于2013/4/16/ 634
仅仅浏览当前的磁盘，控制台程序，用tinyC编译,j下、 k上、 enter确定

	?/******************************************************************
	File: show.c
	data: 2013-04-07 21:57
	*****************************************************************/
	#include <stdio.h>
	#include "find.h"
	#define PATH_MAX 4096*4
	#define SCREEN_MAX_X 80
	#define SCREEN_MAX_Y 25
	char g_Path[PATH_MAX];
	
	//from find.c
	extern FIND_DIR*FindDir(char *path, u_long *Cnt);
	extern int Free_FindDir(FIND_DIR *lpSource);
	extern char *CreatPath(char *path, char *name);

	
	//from screen.c
	extern int SetCursorInfo(int size, int visible);
	extern int SetCursorPosition(int x, int y);
	extern WORD SetCharacterAttrib(int x, int y, WORD attrib, DWORD leng);
	extern int ShowLine(char *content, int line, int Cnt);
	extern int SetTitle(char *content);
	extern int MoveLine(int type, SMALL_RECT *area);

	//from show.c
	int Contrl(FIND_DIR *lpDir, u_long Cnt);
	int ShowScreen(FIND_DIR *list, u_long position, u_long max_position, int lines, int scr_line);
	FIND_DIR *Key_Enter(FIND_DIR *lpDir, u_long Position, u_long *Cnt);

	
	int main(int argc, char *argv[] )
	{
	char *lpD;
	u_long Cnt;
	FIND_DIR *lpDir = NULL;
	strcpy(g_Path, argv[0]);
	lpD =strrchr(g_Path, '\\');
	strcpy(lpD, "\\*");
	lpDir = FindDir(g_Path, &Cnt);

	Contrl(lpDir, Cnt);
	getchar();
	return 0;
	}

	int Contrl(FIND_DIR *lpDir, u_long Cnt)
	{
	u_char get;
	u_long Position = 1;
	int len = SCREEN_MAX_X;
	int line= 0;
	WORD attrib = BACKGROUND_GREEN;
	WORD end_attrib ;
	char title[256];
	SMALL_RECT Area = {0, 0, SCREEN_MAX_X, SCREEN_MAX_Y-1};
	FIND_DIR *NewlpDir = NULL;
	NewAgain:
	SetCursorInfo(0,0);
	ShowScreen(lpDir, 1, Cnt, SCREEN_MAX_Y, 0);
	end_attrib = SetCharacterAttrib(0, line, attrib, len);
	while ( 1 )
	{
	 get = getch();
	 switch (get)
	 {
	 case 0x6b:
	 //up toword
	 SetCharacterAttrib(0, line, end_attrib, len);
	 line--;
	 Position--;
	 if (Position <= 0)
	 {
	 Position = 1;
	 }
	 else
	 {
	 if (line < 0)
	 {
	 MoveLine(1,&Area);
	 ShowScreen(lpDir,Position,Cnt,1,0);
	 }
	 }
	 if (line < 0)
	 {
	 line = 0;
	 }
	 SetCharacterAttrib(0, line, attrib, len);
	 break;
	 case 0x6a:
	 //down toword
	 Position++;
	 if (Position > Cnt)
	 {
	 Position = Cnt;
	 break;
	 }
	 SetCharacterAttrib(0, line, end_attrib, len);
	 line++;
	 if (line > SCREEN_MAX_Y-1)
	 {
	 MoveLine(-1, &Area);
	 ShowScreen(lpDir,Position,Cnt,1,SCREEN_MAX_Y-1);
	 line = SCREEN_MAX_Y-1;
	 }
	
	 SetCharacterAttrib(0, line, attrib, len);

	 break;
	 case 0x20:
	 break;
	 case 0xd:
	 NewlpDir = Key_Enter(lpDir, Position, &Cnt);
	 if (NewlpDir != NULL) //successful
	 {
	 Position = 1;
	 line = 0;
	 system("cls");
	 lpDir = NewlpDir;
	 goto NewAgain;
	 }
	 break;
	 case 0x1b:
	 exit(0);
	 default:
	 ;
	 }

	}
	return 0;
	}

	//______________________________________________________________________
	// 意思：展示指定行数到屏幕上
	// 参数： 链头，开始位置，最大的位置，显示多少个，屏幕的开始位置
	int ShowScreen(FIND_DIR *list, u_long position, u_long max_position, int lines, int scr_line)
	{
	char *name=NULL;
	int i =0;
	int leng =0;

	if (lines <= 0)
	 return 0;
	i = max_position-position;
	if (i < 0)
	 return 0;
	if (i < lines)
	{
	 lines = i+1;
	}
	if (lines+scr_line > SCREEN_MAX_Y)
	{
	 lines = SCREEN_MAX_Y-scr_line;
	}

	while (position > list->count)
	{
	 if (list->next == NULL)
	 return -1;
	 position -= list->count;
	 list = list->next;
	}
	i = position-1;
	while (lines-- > 0)
	{
	 if (list == NULL)
	 return -1;
	 if (i >= list->count)
	 {
	 if (list->next == NULL)
	 return -1;
	 list = list->next;
	 i = 0;
	 }
	 name = list->P_list[i]->name;
	 leng = strlen(name);
	 if (leng >= SCREEN_MAX_X)
	 {
	 leng = SCREEN_MAX_X;

	 }
	 ShowLine(name,scr_line,leng);
	 scr_line++;
	 i++;
	}
	}

	/***************************************************************
	*/
	FIND_DIR *Key_Enter(FIND_DIR *lpDir, u_long Position, u_long *Cnt)
	{
	char path[sizeof(g_Path)];
	char name[FILENAME_MAX];
	FIND_DIR *list = lpDir;
	FIND_DIR *Temp = NULL;
	unsigned attrib= 0;
	u_long Temp_Cnt=0;
	int i = 0;

	while (Position > list->count)
	{
	 if (list->next == NULL)
	 return NULL;
	 Position -= list->count;
	 list = list->next;
	}
	i = Position-1;
	attrib = list->P_list[i]->attrib;
	strcpy(name, list->P_list[i]->name);
	strcpy(path, g_Path);
	if ( (attrib>>4)%2 == 1 )
	{
	 if (*name==0x2e && *(name+1)==0x0) //.
	 {
	 }
	 else if (*name==0x2e && *(name+1)==0x2e && *(name+2)==0x0) //..
	 {
	 CreatPath(path, NULL);
	 Temp = FindDir(path,&Temp_Cnt);
	 if (Temp == NULL)
	 return NULL;
	 Free_FindDir(lpDir);
	 *Cnt = Temp_Cnt;
	 strcpy(g_Path, path);
	 return Temp;
	 }
	 else //other folder
	 {
	 CreatPath(path, name);
	 Temp = FindDir(path,&Temp_Cnt);
	 if (Temp == NULL)
	 return NULL;
	 Free_FindDir(lpDir);
	 *Cnt = Temp_Cnt;
	 strcpy(g_Path, path);
	 return Temp;

	 }

	}
	return NULL;
	}
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