354 lines
6.5 KiB
C
354 lines
6.5 KiB
C
/*
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complete.c
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Created: July 1995 by Philip Homburg <philip@cs.vu.nl>
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*/
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#include <ctype.h>
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#include <dirent.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include "myhistedit.h"
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#include "shell.h"
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#include "complete.h"
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#include "error.h"
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#include "expand.h"
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#include "nodes.h"
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#include "memalloc.h"
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static char **getlist(EditLine *el, int *baselen, int *isdir);
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static char **getlist_tilde(char *prefix);
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static int vstrcmp(const void *v1, const void *v2);
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static void print_list(char **list);
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static int install_extra(EditLine *el, char **list, int baselen, int isdir);
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unsigned char complete(EditLine *el, int ch)
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{
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struct stackmark mark;
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const LineInfo *lf;
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char **list;
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int baselen, prefix, isdir;
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/* Direct the cursor the the end of the word. */
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for(;;)
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{
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lf = el_line(el);
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if (lf->cursor < lf->lastchar &&
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!isspace((unsigned char)*lf->cursor))
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{
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(*(char **)&lf->cursor)++; /* XXX */
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}
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else
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break;
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}
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setstackmark(&mark);
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list= getlist(el, &baselen, &isdir);
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if (list)
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{
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prefix= install_extra(el, list, baselen, isdir);
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el_push(el, "i");
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}
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popstackmark(&mark);
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if (list)
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return CC_REFRESH;
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else
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return CC_ERROR;
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}
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unsigned char complete_list(EditLine *el, int ch)
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{
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struct stackmark mark;
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char **list;
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setstackmark(&mark);
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list= getlist(el, NULL, NULL);
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if (list)
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{
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print_list(list);
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re_goto_bottom(el);
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}
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popstackmark(&mark);
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if (list)
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{
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return CC_REFRESH;
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}
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else
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return CC_ERROR;
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}
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unsigned char complete_or_list(EditLine *el, int ch)
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{
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struct stackmark mark;
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const LineInfo *lf;
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char **list;
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int baselen, prefix, isdir;
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setstackmark(&mark);
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list= getlist(el, &baselen, &isdir);
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if (list)
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{
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prefix= install_extra(el, list, baselen, isdir);
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if (prefix == baselen)
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{
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print_list(list);
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re_goto_bottom(el);
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}
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}
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popstackmark(&mark);
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if (list)
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return CC_REFRESH;
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else
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return CC_ERROR;
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}
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unsigned char complete_expand(EditLine *el, int ch)
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{
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printf("complete_expand\n");
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return CC_ERROR;
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}
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static char **getlist(EditLine *el, int *baselen, int *isdir)
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{
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const LineInfo *lf;
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const char *begin, *end;
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char *dirnam, *basenam;
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union node arg;
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struct arglist arglist;
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DIR *dir;
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struct dirent *dirent;
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int i, l, n;
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char *p, **list;
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struct strlist *slp, *nslp;
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struct stat sb;
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lf = el_line(el);
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/* Try to find to begin and end of the word that we have to comple. */
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begin= lf->cursor;
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while (begin > lf->buffer && !isspace((unsigned char)begin[-1]))
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begin--;
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end= lf->cursor;
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while (end < lf->lastchar && !isspace((unsigned char)end[0]))
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end++;
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*(const char **)&lf->cursor= end; /* XXX */
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/* Copy the word to a string */
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dirnam= stalloc(end-begin+1);
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strncpy(dirnam, begin, end-begin);
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dirnam[end-begin]= '\0';
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/* Cut the word in two pieces: a path and a (partial) component. */
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basenam= strrchr(dirnam, '/');
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if (basenam)
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{
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basenam++;
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p= stalloc(strlen(basenam) + 1);
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strcpy(p, basenam);
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*basenam= '\0';
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basenam= p;
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}
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else
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{
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if (dirnam[0] == '~')
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return getlist_tilde(dirnam);
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basenam= dirnam;
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dirnam= "./";
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}
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if (baselen)
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*baselen= strlen(basenam);
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arg.type= NARG;
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arg.narg.next= NULL;
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arg.narg.text= dirnam;
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arg.narg.backquote= NULL;
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arglist.list= NULL;
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arglist.lastp= &arglist.list;
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expandarg(&arg, &arglist, EXP_TILDE);
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INTOFF;
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list= NULL;
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dir= opendir(arglist.list->text);
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if (dir)
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{
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slp= NULL;
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n= 0;
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l= strlen(basenam);
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while(dirent= readdir(dir))
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{
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if (strncmp(dirent->d_name, basenam, l) != 0)
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continue;
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if (l == 0 && dirent->d_name[0] == '.')
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continue;
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nslp= stalloc(sizeof(*nslp));
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nslp->next= slp;
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slp= nslp;
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slp->text= stalloc(strlen(dirent->d_name)+1);
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strcpy(slp->text, dirent->d_name);
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n++;
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if (n == 1 && isdir != NULL)
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{
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/* Try to findout whether this entry is a
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* file or a directory.
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*/
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p= stalloc(strlen(arglist.list->text) +
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strlen(dirent->d_name) + 1);
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strcpy(p, arglist.list->text);
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strcat(p, dirent->d_name);
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if (stat(p, &sb) == -1)
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printf("stat '%s' failed: %s\n",
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p, strerror(errno));
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if (stat(p, &sb) == 0 && S_ISDIR(sb.st_mode))
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*isdir= 1;
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else
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*isdir= 0;
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}
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}
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closedir(dir);
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if (n != 0)
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{
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list= stalloc((n+1)*sizeof(*list));
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for(i= 0; slp; i++, slp= slp->next)
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list[i]= slp->text;
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if (i != n)
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error("complete'make_list: i != n");
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list[i]= NULL;
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qsort(list, n, sizeof(*list), vstrcmp);
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}
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}
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INTON;
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return list;
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}
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static char **getlist_tilde(char *prefix)
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{
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printf("should ~-complete '%s'\n", prefix);
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return NULL;
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}
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static int vstrcmp(const void *v1, const void *v2)
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{
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return strcmp(*(char **)v1, *(char **)v2);
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}
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#define MAXCOLS 40
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#define SEPWIDTH 4
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static void print_list(char **list)
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{
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struct
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{
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int cols;
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int start[MAXCOLS+1];
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int width[MAXCOLS];
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} best, next;
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int e, i, j, l, n, o, cols, maxw, width;
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int linewidth= 80;
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/* Count the number of entries. */
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for (n= 0; list[n]; n++)
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; /* do nothing */
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if (n == 0)
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error("complete'print_list: n= 0");
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/* Try to maximize the number of columns */
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for (cols= 1; cols<= MAXCOLS; cols++)
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{
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next.cols= cols;
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o= 0;
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width= 0;
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for(j= 0; j<cols; j++)
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{
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next.start[j]= o;
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/* Number of entries in this column. */
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e= (n-o)/(cols-j);
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if ((n-o)%(cols-j))
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e++;
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maxw= 0;
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for (i= 0; i<e; i++)
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{
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l= strlen(list[o+i]);
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if (l < 6)
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l= 6;
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l += SEPWIDTH;
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if (l > maxw)
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maxw= l;
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}
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next.width[j]= maxw;
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width += maxw;
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o += e;
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}
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next.start[j]= o;
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if (cols > 1 && width-SEPWIDTH>linewidth)
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break;
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best= next;
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}
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cols= best.cols;
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e= best.start[1];
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printf("\n");
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for(i= 0; i<e; i++)
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{
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for (j= 0; j<cols; j++)
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{
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if (best.start[j]+i == best.start[j+1])
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continue;
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if (j < cols-1)
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{
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printf("%-*s", best.width[j],
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list[best.start[j]+i]);
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}
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else
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{
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printf("%s", list[best.start[j]+i]);
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}
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}
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if (i < e-1)
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printf("\n");
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}
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fflush(stdout);
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}
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static int install_extra(EditLine *el, char **list, int baselen, int isdir)
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{
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int l;
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char *p, **lp;
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l= strlen(list[0]);
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for (lp= &list[1]; *lp; lp++)
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{
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while(l>0)
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{
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if (strncmp(list[0], *lp, l) != 0)
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l--;
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else
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break;
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}
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}
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if (l > baselen || list[1] == NULL)
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{
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p= stalloc(l-baselen+2);
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strncpy(p, list[0]+baselen, l-baselen);
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if (list[1] == NULL)
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{
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p[l-baselen]= isdir ? '/' : ' ';
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p[l-baselen+1]= '\0';
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l++;
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}
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else
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p[l-baselen]= '\0';
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if (el_insertstr(el, p) == -1)
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return -1;
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}
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return l;
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}
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/*
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* $PchId: complete.c,v 1.2 2006/04/10 14:35:53 philip Exp $
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*/
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