阅读器（只能读英文）

frustreated 发表于 2013-5-14 22:00:26

花了整整两天，自己写了个阅读器（匆匆忙完，不免有bug--）真机测试可行（cas + click版），文件越大，打开速度越慢。打开后，阅读流畅。
按键（上）向前翻一页
按键（下）向后翻一页
按键（左）向前翻20页
按键（右）向后翻20页
esc退出
不能改变字体大小和颜色
只能读英文，而且，最好目录不含有中文
现把代码和程序发布，等有空再改进吧。里面有一个函数剽窃的作者
作者发布的帖子地址为：http://www.omnimaga.org/index.php?topic=7155.0
希望原作者能原谅本人的不端行为。{:011:}

本人邮箱：[email protected]
有在这方面交流，或其他方面（微分，变分，勒贝格积分，fourier变换或者希尔伯特等之类）交流的同学都欢迎~~

代码：
#include <os.h>
#include <nspireio2.h>
#include <stdio.h>    /* printf */
#include <stdlib.h> /* strtol */
char* numToStr(int num) {
char* str;
char digit[]="0123456789ABCDEF";
int numcopy=num;
int numdigits=0;
while(numcopy>0) {
   numcopy/=10;
   numdigits++;
}
int i=0;
str=malloc(numdigits+1);
while(num>0) {
   str=digit;
   num/=10;
   i++;
}
str=0;
return str;
}
int GetDirNum(char *path_name)
{
DIR* dir;
struct dirent *ptr;
int dir_num=0;//当前目录下总文件数目（包含文件夹）//类型为整形
//char *dir_char=(char*)malloc(8*sizeof(char));//当前目录下总文件数目（包含文件夹）//类型为字符串
dir=opendir(path_name);//"/documents"
while((ptr=readdir(dir))!= NULL)
{dir_num++;}
closedir(dir);
return (dir_num);
}
void ShowDirectory(int file_choose,char* path_name,char* file_name,nio_console *csl)//返回值为file_%name
{
file_choose=file_choose%(GetDirNum(path_name));
if(file_choose<0)
{file_choose=file_choose+GetDirNum(path_name);}
nio_Clear(csl);
nio_InitConsole(csl, 52, 29, 0, 0, 15,0 );
nio_DrawConsole(csl);
DIR* dir;struct dirent *ptr;
int size_file_name=-1;//文件名长度
dir = opendir(path_name);
int dir_num_show=0;//第num个文件//要选择的
while((ptr = readdir(dir))!= NULL)
{
if(dir_num_show==(file_choose))
{
size_file_name=strlen(ptr->d_name);//获取文件名长度
memcpy(file_name,ptr->d_name,size_file_name);
file_name='\0';
nio_drawstr(0,0,0,dir_num_show,ptr->d_name,0,15);
nio_printf(csl,"\n");
}
else
{
nio_printf(csl,ptr->d_name);
nio_printf(csl,"\n");
}
dir_num_show++;
}
closedir(dir);
}
void GetParrentPath(char* path_name)
{
int i=strlen(path_name);//逆序寻找字符"/",并设置成'/0'
for(;i>1;i--)
{
if(path_name=='/')
{path_name=='\0';break;}
}
}

typedef struct St_Line
{
char *linestring;
struct St_Line *pNext;
struct St_Line *pPre;
struct St_Line *pCurrent;
}StLine;

void Initialize(StLine * pLine)
{
pLine->linestring=NULL;pLine->pCurrent=NULL;pLine->pNext=NULL;pLine->pPre=NULL;
}
void Show29Line(nio_console *csl,StLine *pLine)
{
if((pLine->pCurrent)!=NULL)
{
//~ nio_Clear(csl);
clrscr();
nio_InitConsole(csl, 52, 29, 0, 0, 15,0 );
nio_DrawConsole(csl);
int i=0;
for (i=0;i<29;i++)
{
//pLine->pCurrent->linestring='\n';pLine->pCurrent->linestring='\0';
nio_PrintStr(csl,pLine->pCurrent->linestring);
//nio_PrintStr(csl,numToStr(strlen(pLine->pCurrent->linestring)));//i++;
//~ if(strlen(pLine->pCurrent->linestring)==52)
//~ {nio_PrintStr(csl,"\n");}
if((pLine->pCurrent->pNext)!=NULL)
{
pLine->pCurrent=pLine->pCurrent->pNext;
}
else
{return;}
}}
}
int main(void)
{
nio_console csl;
lcd_ingray();
clrscr();
// 52 columns, 29 rows. 0px offset for x/y.
// Background color 15 (white), foreground color 0 (black)
int file_choose=1;
char *path_name=(char *)malloc(128*sizeof(char));//
char *file_name=(char *)malloc(128*sizeof(char));
ShowDirectory(file_choose,path_name,file_name,&csl);
StLine *pLine=(StLine *)malloc(sizeof(StLine));
StLine *pEnd_pre_29;
Initialize(pLine);
while(1)
{
wait_key_pressed();
if(isKeyPressed(KEY_NSPIRE_8)||isKeyPressed(KEY_NSPIRE_UP))//Modify!!!!
{file_choose--;ShowDirectory(file_choose,path_name,file_name,&csl);}
if(isKeyPressed(KEY_NSPIRE_2)||isKeyPressed(KEY_NSPIRE_DOWN))//Modify!!!!
{file_choose++;ShowDirectory(file_choose,path_name,file_name,&csl);}
if(isKeyPressed(KEY_NSPIRE_ENTER))//Modify!!!!KEY_NSPIRE_ENTER
{
if(strstr(file_name,".")==NULL)
{
strcat(path_name,"/");
strcat(path_name,file_name);
ShowDirectory(file_choose,path_name,file_name,&csl);
}
else
{
if((strlen(path_name)>1)&&(strstr(file_name,"..")!=NULL))//如果路径名长度大于1（考虑路径名为"/"的情况）
{
char* separator;
separator=strrchr(path_name,'/');
nio_printf(&csl,path_name);
separator='\0';
ShowDirectory(file_choose,path_name,file_name,&csl);
}
else
{
if(strstr(file_name,".tns")!=NULL)
{
strcat(path_name,"/");
strcat(path_name,file_name);
FILE *pFile;
pFile=fopen(file_name,"r");
int Line_Num=0;
while (!feof(pFile))
{
Line_Num++;
if (Line_Num==1)
{
pLine->linestring=(char*)malloc(53*sizeof(char));
pLine->linestring=fgets(pLine->linestring,52*sizeof(char),pFile);
pLine->pCurrent=pLine;
}
else
{
pLine->pCurrent->pNext=(StLine *)malloc(sizeof(StLine));
Initialize(pLine->pCurrent->pNext);
pLine->pCurrent->pNext->pPre=pLine->pCurrent;
pLine->pCurrent=pLine->pCurrent->pNext;
pLine->pCurrent->pNext=NULL;
pLine->pCurrent->linestring=(char*)malloc(53*sizeof(char));
fgets(pLine->pCurrent->linestring,52*sizeof(char),pFile);
}
}
fclose(pFile);
pEnd_pre_29=pLine->pCurrent;

int i=0;
for(i=0;i<29;i++)
{
if(pEnd_pre_29->pPre!=NULL)
{pEnd_pre_29=pEnd_pre_29->pPre;}
else
{
pEnd_pre_29=pLine;
break;
}
}
pLine->pCurrent=pLine;
Show29Line(&csl,pLine);
while(1)
{
wait_key_pressed();
if(isKeyPressed(KEY_NSPIRE_DOWN))
{
Show29Line(&csl,pLine);
}
if(isKeyPressed(KEY_NSPIRE_UP))//&&(pLine->pCurrent->pNext!=NULL))
{
if((pLine->pCurrent)!=NULL)
{for(i=0;i<58;i++)//
{
if((pLine->pCurrent->pPre)!=NULL)
{pLine->pCurrent=pLine->pCurrent->pPre;}
else{pLine->pCurrent=pLine;break;}
}}
Show29Line(&csl,pLine);
}
if(isKeyPressed(KEY_NSPIRE_RIGHT))
{
for (i=0;i<(29*20);i++)
{
if((pLine->pCurrent->pNext)==NULL)
{pLine->pCurrent=pEnd_pre_29;break;}
else
{pLine->pCurrent=pLine->pCurrent->pNext;}
}
Show29Line(&csl,pLine);
}
if(isKeyPressed(KEY_NSPIRE_LEFT))
{
for (i=0;i<(29*20);i++)
{
if((pLine->pCurrent->pPre)==NULL)
{pLine->pCurrent=pLine;break;}
else
{pLine->pCurrent=pLine->pCurrent->pPre;}
}
Show29Line(&csl,pLine);
}
if(isKeyPressed(KEY_NSPIRE_ESC))
{
pLine->pCurrent=pLine;
while((pLine->pCurrent->pNext)!=NULL)
{
free(pLine->pCurrent->linestring);///释放字符串内存
pLine->pCurrent->linestring=NULL;
pLine->pCurrent=pLine->pCurrent->pNext;
}
free(pLine->pCurrent->linestring);
while((pLine->pCurrent->pPre)!=NULL)
{
pLine->pCurrent=pLine->pCurrent->pPre;
free(pLine->pCurrent->pNext);//释放字符串地址的内存
pLine->pCurrent->pNext=NULL;
}
free(pLine->pCurrent->pNext);
free(pLine);
return;
}
}
}
}
}
}
if(isKeyPressed(KEY_NSPIRE_ESC))
{break;}
};

free(file_name);
free(path_name);
free(pLine);
free(pEnd_pre_29);
   nio_CleanUp(&csl);
   return 0;
}

frustreated 发表于 2013-5-14 22:04:10

附件在此~

DAS 发表于 2013-5-14 23:26:30

鼓励一下。

frustreated 发表于 2013-5-15 08:54:58

稍稍对程序做了修正，去掉了右侧边缘刷新不掉的痕迹。

白菜白 发表于 2013-5-15 12:20:47

好动西学习了

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阅读器（只能读英文）