简单行编辑程序例

数据结构源码--串操作应用举例 简单行编辑程序例

#include #include #include \#include \

struct line{ int charnum; char *base; };

typedef struct line SequListElemType;

#include \

#define MAXLINES 1000

int key;

int cureditline=0; int curscrtopline=0; int cureditcol=0; int funckey; int editwinx=2; int editwiny=3;

int editwinlines=20; int mainover=0; FILE *curfile;

char filename[255]=\

SequList *Document;

char ascii(int k);

printdoc(int startfileline,int startscrline); readdoc(FILE *fp);

editline(int curline,int maxcolnum) {

char s[2000];

setscrcolor(BLUE,YELLOW);

strcpy(s,Document->elem[curline].base);

getstring(editwinx,editwiny+curline-curscrtopline,s,maxcolnum);

free(Document->elem[curline].base);

Document->elem[curline].base=(char *)malloc(strlen(s)+1); strcpy(Document->elem[curline].base,s); }

printdoc(int startfileline,int startscrline) {

int i; int j;

cursor_hide(); i=startscrline; j=startfileline;

setscrcolor(BLUE,YELLOW);

gotoxy(editwinx,editwiny+startscrline);

while(i<=editwinlines && ilength) {

clearscrline(editwinx,editwiny+i,78);

putsxy(editwinx,editwiny+i++,Document->elem[j++ -1].base); }

while(i<=editwinlines)

clearscrline(editwinx,editwiny+i++,78); cursor_show(); }

getline(FILE *fp,char *l) {

int i=0;

while(!feof(fp))

if((l[i++]=fgetc(fp))=='\\n') break; l[i-1]='\\0'; }

closedoc(FILE *fp) {

int i;

fclose(fp);

for(i=0;ilength;i++) free(Document->elem[i].base); SequListDestroy(Document); }

readdoc(FILE *fp)

{

char *newline; char s[20000]; int linenum=0;

struct line curline; if(!fp) return; while(!feof(fp)) {

getline(fp,s); linenum++;

newline=(char *)malloc(strlen(s)+1); strcpy(newline,s); curline.base=newline;

curline.charnum=strlen(newline);

SequListInsert(Document,linenum,curline); } }

char ascii(int k) {

char c;

c=(k<<8)>>8; if(c>=32&&c<127) return c; else

return 0; }

insertchar(char *s,char c,int pos) {

int i;

for(i=strlen(s)+1;i>pos;i--) s[i]=s[i-1]; s[i]=c; }

deletechar(char *s,int pos) {

int i; int j;

j=strlen(s);

for(i=pos;i<=j;i++) s[i]=s[i+1]; }

clearscrline(int x,int y,int num)

{

int i;

for(i=0;i

getsindiag(int x,int y,int w,char *title,char *s) {

char buf[2000];

gettext(x,y,x+w+2,y+2,buf); setscrcolor(LIGHTGRAY,BLACK); box(x,y,w+2,3);

putsxy(x+3,y,title); getstring(x+1,y+1,s,w); puttext(x,y,x+w+2,y+2,buf); }

insertnewline(int linenum) {

struct line l;

l.base=(char *)malloc(80); l.charnum=0; l.base[0]='\\0';

SequListInsert(Document,linenum,l); }

deleteline(int linenum) {

SequListDelete(Document,linenum); }

getstring(int x,int y,char *s,int num) {

int k; int n; char c;

int curpos=0; int thisover=0; cursor_show();

/* putsxy(x,y,s); */ gotoxy(x,y); while(!thisover) {

if(k=bioskey(1)) { switch(k){ case KEYEsc:

case KEYReturn: case KEYUp: case KEYDown: case KEYAlt_x: case KEYCtrl_y: return; break; default: bioskey(0); } } else continue; switch(k){ case KEYHome: curpos=0; gotoxy(x+curpos,y); break; case KEYEnd: curpos=strlen(s); gotoxy(x+curpos,y); break; case KEYReturn: thisover=1; break; case KEYLeft: if(curpos) curpos--; gotoxy(x+curpos,y); break; case KEYRight: if(curpos

case KEYBackspace: if(curpos) { deletechar(s,curpos-1); curpos--;

cursor_hide(); clearscrline(x,y,num); putsxy(x,y,s); gotoxy(x+curpos,y); cursor_show(); } break; case KEYEsc: return; default: c=ascii(k); if (c&&strlen(s)

dofunc(int itemno) {

switch(itemno) {

case 0: break;

case 1: /*Open file*/ getsindiag(3,4,50,\ if(curfile=fopen(filename,\ { readdoc(curfile); printdoc(1,0); }

break; case 3: mainover=1; break; case 21: showmessagew(); default: break; } }

main() { int i; char c;

char *mainmenuitem[10]={\

char *submenu1[10]={\ char *submenu2[10]={\ char *submenu3[20]={\

initmenu(MAINMENU_V,3,&mainmenu,mainmenuitem); initmenu(SUBMENU_H,4,&submenu[0],submenu1); initmenu(SUBMENU_H,3,&submenu[1],submenu2); initmenu(SUBMENU_H,2,&submenu[2],submenu3); for(i=0;i<3;i++)

addsubmenu(&mainmenu,i,&submenu[i]); definemenupos(3,1,&mainmenu); cursor_hide();

showmenu(&mainmenu); showmainw(1,2,80,23); showmessagew();

SequListInit(&Document,MAXLINES); insertnewline(1);

setscrcolor(BLUE,YELLOW); while(!mainover) {

if(key=bioskey(1)) {if(!ascii(key)) bioskey(0); } else

continue;

switch(key){ case KEYBackspace: case KEYDelete: case KEYHome: case KEYEnd: case KEYReturn: if(cureditline-curscrtopline0) { cureditline--; gotoxy(editwinx,editwiny+cureditline); editline(cureditline,78); } break; case KEYDown: if (cureditlinelength-1) { cureditline++; gotoxy(editwinx,editwiny+cureditline); editline(cureditline,78); } break; case KEYCtrl_y: deleteline(cureditline+1); if(Document->length==0) insertnewline(cureditline+1); if(cureditline>=Document->length) insertnewline(cureditline+1); printdoc(cureditline+1,cureditline-curscrtopline); gotoxy(editwinx,editwiny+cureditline); editline(cureditline,78); break;

case KEYLeft: case KEYRight: break; case KEYCtrl_s: break; case ESC: cursor_hide(); dofunc(getmenuitem()); break; case KEYAlt_x: mainover=1; break; default: gotoxy(editwinx,editwiny+cureditline-curscrtopline); editline(cureditline,78); break; } }

closedoc(curfile);

setscrcolor(BLACK,WHITE); clrscr();

cursor_show(); }

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