sys/src/cmd/mothra/forms.c

   1 /*
   2  * type=image is treated like submit
   3  */
   4 #include <u.h>
   5 #include <libc.h>
   6 #include <draw.h>
   7 #include <event.h>
   8 #include <panel.h>
   9 #include "mothra.h"
  10 #include "html.h"
  11 typedef struct Field Field;
  12 typedef struct Option Option;
  13 struct Form{
  14         int method;
  15         Url *action;
  16         Field *fields, *efields;
  17         Form *next;
  18 };
  19 struct Field{
  20         Field *next;
  21         Form *form;
  22         char *name;
  23         char *value;
  24         int checked;
  25         int size;               /* should be a point, but that feature is deprecated */
  26         int maxlength;
  27         int type;
  28         int rows, cols;
  29         Option *options;
  30         int multiple;
  31         int state;              /* is the button marked? */
  32         Panel *p;
  33         Panel *pulldown;
  34         Panel *textwin;
  35 };
  36 /*
  37  * Field types
  38  */
  39 enum{
  40         TYPEIN=1,
  41         CHECK,
  42         PASSWD,
  43         RADIO,
  44         SUBMIT,
  45         RESET,
  46         SELECT,
  47         TEXTWIN,
  48         HIDDEN,
  49         INDEX,
  50 };
  51 struct Option{
  52         int selected;
  53         int def;
  54         char label[NLABEL+1];
  55         char *value;
  56         Option *next;
  57 };
  58 void h_checkinput(Panel *, int, int);
  59 void h_radioinput(Panel *, int, int);
  60 void h_submitinput(Panel *, int);
  61 void h_submittype(Panel *, char *);
  62 void h_submitindex(Panel *, char *);
  63 void h_resetinput(Panel *, int);
  64 void h_select(Panel *, int, int);
  65 void h_cut(Panel *, int);
  66 void h_paste(Panel *, int);
  67 void h_snarf(Panel *, int);
  68 void h_edit(Panel *);
  69 char *selgen(Panel *, int);
  70 char *nullgen(Panel *, int);
  71 Field *newfield(Form *form){
  72         Field *f;
  73         f=emallocz(sizeof(Field), 1);
  74         if(form->efields==0)
  75                 form->fields=f;
  76         else
  77                 form->efields->next=f;
  78         form->efields=f;
  79         f->next=0;
  80         f->form=form;
  81         return f;
  82 }
  83 /*
  84  * Called by rdhtml on seeing a forms-related tag
  85  */
  86 void rdform(Hglob *g){
  87         char *s;
  88         Field *f;
  89         Option *o, **op;
  90         Form *form;
  91         switch(g->tag){
  92         default:
  93                 fprint(2, "Bad tag <%s> in rdform (Can't happen!)\n", g->token);
  94                 return;
  95         case Tag_form:
  96                 if(g->form){
  97                         htmlerror(g->name, g->lineno, "nested forms illegal\n");
  98                         break;
  99                 }
 100                 g->form=emallocz(sizeof(Form), 1);
 101                 g->form->action=emalloc(sizeof(Url));
 102                 s=pl_getattr(g->attr, "action");
 103                 if(s==0)
 104                         *g->form->action=*g->dst->url;
 105                 else
 106                         crackurl(g->form->action, s, g->dst->base);
 107                 s=pl_getattr(g->attr, "method");
 108                 if(s==0)
 109                         g->form->method=GET;
 110                 else if(cistrcmp(s, "post")==0)
 111                         g->form->method=POST;
 112                 else{
 113                         if(cistrcmp(s, "get")!=0)
 114                                 htmlerror(g->name, g->lineno,
 115                                         "unknown form method %s\n", s);
 116                         g->form->method=GET;
 117                 }
 118                 g->form->fields=0;
 119
 120                 g->form->next = g->dst->form;
 121                 g->dst->form = g->form;
 122
 123                 break;
 124         case Tag_input:
 125                 if(g->form==0){
 126                 BadTag:
 127                         htmlerror(g->name, g->lineno, "<%s> not in form, ignored\n",
 128                                 tag[g->tag].name);
 129                         break;
 130                 }
 131                 f=newfield(g->form);
 132                 s=pl_getattr(g->attr, "name");
 133                 if(s==0)
 134                         f->name=0;
 135                 else
 136                         f->name=strdup(s);
 137                 s=pl_getattr(g->attr, "value");
 138                 if(s==0)
 139                         f->value=strdup("");
 140                 else
 141                         f->value=strdup(s);
 142                 f->checked=pl_hasattr(g->attr, "checked");
 143                 s=pl_getattr(g->attr, "size");
 144                 if(s==0)
 145                         f->size=20;
 146                 else
 147                         f->size=atoi(s);
 148                 s=pl_getattr(g->attr, "maxlength");
 149                 if(s==0)
 150                         f->maxlength=0x3fffffff;
 151                 else
 152                         f->maxlength=atoi(s);
 153                 s=pl_getattr(g->attr, "type");
 154                 /* bug -- password treated as text */
 155                 if(s==0 || cistrcmp(s, "text")==0 || cistrcmp(s, "password")==0 || cistrcmp(s, "int")==0){
 156                         s=pl_getattr(g->attr, "name");
 157                         if(s!=0 && strcmp(s, "isindex")==0)
 158                                 f->type=INDEX;
 159                         else
 160                                 f->type=TYPEIN;
 161                         /*
 162                          * If there's exactly one attribute, use its value as the name,
 163                          * regardless of the attribute name.  This makes
 164                          * http://linus.att.com/ias/puborder.html work.
 165                          */
 166                         if(s==0){
 167                                 if(g->attr[0].name && g->attr[1].name==0)
 168                                         f->name=strdup(g->attr[0].value);
 169                                 else
 170                                         f->name=strdup("no-name");
 171                         }
 172                 }
 173                 else if(cistrcmp(s, "checkbox")==0)
 174                         f->type=CHECK;
 175                 else if(cistrcmp(s, "radio")==0)
 176                         f->type=RADIO;
 177                 else if(cistrcmp(s, "submit")==0)
 178                         f->type=SUBMIT;
 179                 else if(cistrcmp(s, "image")==0){
 180                         /* presotto's egregious hack to make image submits do something */
 181                         if(f->name){
 182                                 free(f->name);
 183                                 f->name=0;
 184                         }
 185                         f->type=SUBMIT;
 186                 } else if(cistrcmp(s, "reset")==0)
 187                         f->type=RESET;
 188                 else if(cistrcmp(s, "hidden")==0)
 189                         f->type=HIDDEN;
 190                 else{
 191                         htmlerror(g->name, g->lineno, "bad field type %s, ignored", s);
 192                         break;
 193                 }
 194                 if((f->type==CHECK || f->type==RADIO) && !pl_hasattr(g->attr, "value")){
 195                         free(f->value);
 196                         f->value=strdup("on");
 197                 }
 198                 if(f->type!=HIDDEN)
 199                         pl_htmloutput(g, g->nsp, f->value[0]?f->value:"blank field", f);
 200                 break;
 201         case Tag_select:
 202                 if(g->form==0) goto BadTag;
 203                 f=newfield(g->form);
 204                 s=pl_getattr(g->attr, "name");
 205                 if(s==0){
 206                         f->name=strdup("select");
 207                         htmlerror(g->name, g->lineno, "select has no name=\n");
 208                 }
 209                 else
 210                         f->name=strdup(s);
 211                 s=pl_getattr(g->attr, "size");
 212                 if(s==0) f->size=4;
 213                 else{
 214                         f->size=atoi(s);
 215                         if(f->size<=0) f->size=1;
 216                 }
 217                 f->multiple=pl_hasattr(g->attr, "multiple");
 218                 f->type=SELECT;
 219                 f->options=0;
 220                 g->text=g->token;
 221                 g->tp=g->text;
 222                 g->etext=g->text;
 223                 break;
 224         case Tag_option:
 225                 if(g->form==0) goto BadTag;
 226                 f=g->form->efields;
 227                 o=emallocz(sizeof(Option), 1);
 228                 for(op=&f->options;*op;op=&(*op)->next);
 229                 *op=o;
 230                 o->next=0;
 231                 g->text=o->label;
 232                 g->tp=o->label;
 233                 g->etext=o->label+NLABEL;
 234                 memset(o->label, 0, NLABEL+1);
 235                 *g->tp++=' ';
 236                 o->def=pl_hasattr(g->attr, "selected");
 237                 o->selected=o->def;
 238                 s=pl_getattr(g->attr, "value");
 239                 if(s==0)
 240                         o->value=o->label+1;
 241                 else
 242                         o->value=strdup(s);
 243                 break;
 244         case Tag_textarea:
 245                 if(g->form==0) goto BadTag;
 246                 f=newfield(g->form);
 247                 s=pl_getattr(g->attr, "name");
 248                 if(s==0){
 249                         f->name=strdup("enter text");
 250                         htmlerror(g->name, g->lineno, "select has no name=\n");
 251                 }
 252                 else
 253                         f->name=strdup(s);
 254                 s=pl_getattr(g->attr, "rows");
 255                 f->rows=s?atoi(s):8;
 256                 s=pl_getattr(g->attr, "cols");
 257                 f->cols=s?atoi(s):30;
 258                 f->type=TEXTWIN;
 259                 /* suck up initial text */
 260                 pl_htmloutput(g, g->nsp, f->name, f);
 261                 break;
 262         case Tag_isindex:
 263                 /*
 264                  * Make up a form with one tag, of type INDEX
 265                  * I have seen a page with <ISINDEX PROMPT="Enter a title here ">,
 266                  * which is nonstandard and not handled here.
 267                  */
 268                 form=emalloc(sizeof(Form));
 269                 form->fields=0;
 270                 form->efields=0;
 271                 form->action=emalloc(sizeof(Url));
 272                 s=pl_getattr(g->attr, "action");
 273                 if(s==0)
 274                         *form->action=*g->dst->url;
 275                 else
 276                         crackurl(form->action, s, g->dst->base);
 277                 form->method=GET;
 278                 form->fields=0;
 279                 f=newfield(form);
 280                 f->name=0;
 281                 f->value=strdup("");
 282                 f->size=20;
 283                 f->maxlength=0x3fffffff;
 284                 f->type=INDEX;
 285                 pl_htmloutput(g, g->nsp, f->value[0]?f->value:"blank field", f);
 286                 break;
 287         }
 288 }
 289 /*
 290  * Called by rdhtml on seeing a forms-related end tag
 291  */
 292 void endform(Hglob *g){
 293         switch(g->tag){
 294         case Tag_form:
 295                 g->form=0;
 296                 break;
 297         case Tag_select:
 298                 if(g->form==0)
 299                         htmlerror(g->name, g->lineno, "</select> not in form, ignored\n");
 300                 else
 301                         pl_htmloutput(g, g->nsp, g->form->efields->name,g->form->efields);
 302                 break;
 303         case Tag_textarea:
 304                 break;
 305         }
 306 }
 307 char *nullgen(Panel *, int ){
 308         return 0;
 309 }
 310 char *selgen(Panel *p, int index){
 311         Option *a;
 312         Field *f;
 313         f=p->userp;
 314         if(f==0) return 0;
 315         for(a=f->options;index!=0 && a!=0;--index,a=a->next);
 316         if(a==0) return 0;
 317         a->label[0]=a->selected?'*':' ';
 318         return a->label;
 319 }
 320 char *seloption(Field *f){
 321         Option *a;
 322         for(a=f->options;a!=0;a=a->next)
 323                 if(a->selected)
 324                         return a->label+1;
 325         return f->name;
 326 }
 327 void mkfieldpanel(Rtext *t){
 328         Action *a;
 329         Panel *win, *scrl, *menu, *pop, *button;
 330         Field *f;
 331
 332         if((a = t->user) == nil)
 333                 return;
 334         if((f = a->field) == nil)
 335                 return;
 336
 337         f->p=0;
 338         switch(f->type){
 339         case TYPEIN:
 340                 f->p=plentry(0, 0, f->size*chrwidth, f->value, h_submittype);
 341                 break;
 342         case CHECK:
 343                 f->p=plcheckbutton(0, 0, "", h_checkinput);
 344                 f->state=f->checked;
 345                 plsetbutton(f->p, f->checked);
 346                 break;
 347         case RADIO:
 348                 f->p=plradiobutton(0, 0, "", h_radioinput);
 349                 f->state=f->checked;
 350                 plsetbutton(f->p, f->checked);
 351                 break;
 352         case SUBMIT:
 353                 f->p=plbutton(0, 0, f->value[0]?f->value:"submit", h_submitinput);
 354                 break;
 355         case RESET:
 356                 f->p=plbutton(0, 0, f->value[0]?f->value:"reset", h_resetinput);
 357                 break;
 358         case SELECT:
 359                 f->pulldown=plgroup(0,0);
 360                 scrl=plscrollbar(f->pulldown, PACKW|FILLY);
 361                 win=pllist(f->pulldown, PACKN, nullgen, f->size, h_select);
 362                 win->userp=f;
 363                 plinitlist(win, PACKN, selgen, f->size, h_select);
 364                 plscroll(win, 0, scrl);
 365                 plpack(f->pulldown, Rect(0,0,1024,1024));
 366                 f->p=plpulldown(0, FIXEDX, seloption(f), f->pulldown, PACKS);
 367                 f->p->fixedsize.x=f->pulldown->r.max.x-f->pulldown->r.min.x;
 368                 break;
 369         case TEXTWIN:
 370                 menu=plgroup(0,0);
 371                 f->p=plframe(0,0);
 372                 pllabel(f->p, PACKN|FILLX, f->name);
 373                 scrl=plscrollbar(f->p, PACKW|FILLY);
 374                 pop=plpopup(f->p, PACKN|FILLX, 0, menu, 0);
 375                 f->textwin=pledit(pop, EXPAND, Pt(f->cols*chrwidth, f->rows*font->height),
 376                         0, 0, h_edit);
 377                 f->textwin->userp=f;
 378                 button=plbutton(menu, PACKN|FILLX, "cut", h_cut);
 379                 button->userp=f->textwin;
 380                 button=plbutton(menu, PACKN|FILLX, "paste", h_paste);
 381                 button->userp=f->textwin;
 382                 button=plbutton(menu, PACKN|FILLX, "snarf", h_snarf);
 383                 button->userp=f->textwin;
 384                 plscroll(f->textwin, 0, scrl);
 385                 break;
 386         case INDEX:
 387                 f->p=plentry(0, 0, f->size*chrwidth, f->value, h_submitindex);
 388                 break;
 389         }
 390         if(f->p){
 391                 f->p->userp=f;
 392                 free(t->text);
 393                 t->text=0;
 394                 t->p=f->p;
 395                 t->hot=1;
 396         }
 397 }
 398 void h_checkinput(Panel *p, int, int v){
 399         ((Field *)p->userp)->state=v;
 400 }
 401 void h_radioinput(Panel *p, int, int v){
 402         Field *f, *me;
 403         me=p->userp;
 404         me->state=v;
 405         if(v){
 406                 for(f=me->form->fields;f;f=f->next)
 407                         if(f->type==RADIO && f!=me && strcmp(f->name, me->name)==0){
 408                                 plsetbutton(f->p, 0);
 409                                 f->state=0;
 410                                 pldraw(f->p, screen);
 411                         }
 412         }
 413 }
 414 void h_select(Panel *p, int, int index){
 415         Option *a;
 416         Field *f;
 417         f=p->userp;
 418         if(f==0) return;
 419         if(!f->multiple) for(a=f->options;a;a=a->next) a->selected=0;
 420         for(a=f->options;index!=0 && a!=0;--index,a=a->next);
 421         if(a==0) return;
 422         a->selected=!a->selected;
 423         plinitpulldown(f->p, FIXEDX, seloption(f), f->pulldown, PACKS);
 424         pldraw(f->p, screen);
 425 }
 426 void h_resetinput(Panel *p, int){
 427         Field *f;
 428         Option *o;
 429         for(f=((Field *)p->userp)->form->fields;f;f=f->next) switch(f->type){
 430         case TYPEIN:
 431         case PASSWD:
 432                 plinitentry(f->p, 0, f->size*chrwidth, f->value, 0);
 433                 break;
 434         case CHECK:
 435         case RADIO:
 436                 f->state=f->checked;
 437                 plsetbutton(f->p, f->checked);
 438                 break;
 439         case SELECT:
 440                 for(o=f->options;o;o=o->next)
 441                         o->selected=o->def;
 442                 break;
 443         }
 444         pldraw(text, screen);
 445 }
 446 void h_edit(Panel *p){
 447         plgrabkb(p);
 448 }
 449 Rune *snarfbuf=0;
 450 int nsnarfbuf=0;
 451 void h_snarf(Panel *p, int){
 452         int s0, s1;
 453         Rune *text;
 454         p=p->userp;
 455         plegetsel(p, &s0, &s1);
 456         if(s0==s1) return;
 457         text=pleget(p);
 458         if(snarfbuf) free(snarfbuf);
 459         nsnarfbuf=s1-s0;
 460         snarfbuf=malloc(nsnarfbuf*sizeof(Rune));
 461         if(snarfbuf==0){
 462                 fprint(2, "No mem\n");
 463                 exits("no mem");
 464         }
 465         memmove(snarfbuf, text+s0, nsnarfbuf*sizeof(Rune));
 466 }
 467 void h_cut(Panel *p, int b){
 468         h_snarf(p, b);
 469         plepaste(p->userp, 0, 0);
 470 }
 471 void h_paste(Panel *p, int){
 472         plepaste(p->userp, snarfbuf, nsnarfbuf);
 473 }
 474 int ulen(char *s){
 475         int len;
 476         len=0;
 477         for(;*s;s++){
 478                 if(strchr("/$-_@.!*'(), ", *s)
 479                 || 'a'<=*s && *s<='z'
 480                 || 'A'<=*s && *s<='Z'
 481                 || '0'<=*s && *s<='9')
 482                         len++;
 483                 else
 484                         len+=3;
 485         }
 486         return len;
 487 }
 488 int hexdigit(int v){
 489         return 0<=v && v<=9?'0'+v:'A'+v-10;
 490 }
 491 char *ucpy(char *buf, char *s){
 492         for(;*s;s++){
 493                 if(strchr("/$-_@.!*'(),", *s)
 494                 || 'a'<=*s && *s<='z'
 495                 || 'A'<=*s && *s<='Z'
 496                 || '0'<=*s && *s<='9')
 497                         *buf++=*s;
 498                 else if(*s==' ')
 499                         *buf++='+';
 500                 else{
 501                         *buf++='%';
 502                         *buf++=hexdigit((*s>>4)&15);
 503                         *buf++=hexdigit(*s&15);
 504                 }
 505         }
 506         *buf='\0';
 507         return buf;
 508 }
 509 char *runetou(char *buf, Rune r){
 510         char rbuf[2];
 511         if(r<=255){
 512                 rbuf[0]=r;
 513                 rbuf[1]='\0';
 514                 buf=ucpy(buf, rbuf);
 515         }
 516         return buf;
 517 }
 518 /*
 519  * If there's exactly one button with type=text, then
 520  * a CR in the button is supposed to submit the form.
 521  */
 522 void h_submittype(Panel *p, char *){
 523         int ntype;
 524         Field *f;
 525         ntype=0;
 526         for(f=((Field *)p->userp)->form->fields;f;f=f->next) if(f->type==TYPEIN) ntype++;
 527         if(ntype==1) h_submitinput(p, 0);
 528 }
 529 void h_submitindex(Panel *p, char *){
 530         h_submitinput(p, 0);
 531 }
 532 void h_submitinput(Panel *p, int){
 533         Form *form;
 534         int size, nrune;
 535         char *buf, *bufp, sep;
 536         Rune *rp;
 537         Field *f;
 538         Option *o;
 539         form=((Field *)p->userp)->form;
 540         if(form->method==GET) size=ulen(form->action->fullname)+1;
 541         else size=1;
 542         for(f=form->fields;f;f=f->next) switch(f->type){
 543         case TYPEIN:
 544         case PASSWD:
 545                 size+=ulen(f->name)+1+ulen(plentryval(f->p))+1;
 546                 break;
 547         case INDEX:
 548                 size+=ulen(plentryval(f->p))+1;
 549                 break;
 550         case CHECK:
 551         case RADIO:
 552                 if(!f->state) break;
 553         case HIDDEN:
 554                 size+=ulen(f->name)+1+ulen(f->value)+1;
 555                 break;
 556         case SELECT:
 557                 for(o=f->options;o;o=o->next)
 558                         if(o->selected)
 559                                 size+=ulen(f->name)+1+ulen(o->value)+1;
 560                 break;
 561         case TEXTWIN:
 562                 size+=ulen(f->name)+1+plelen(f->textwin)*3+1;
 563                 break;
 564         }
 565         buf=emalloc(size);
 566         if(form->method==GET){
 567                 strcpy(buf, form->action->fullname);
 568                 sep='?';
 569         }
 570         else{
 571                 buf[0]='\0';
 572                 sep=0;
 573         }
 574         bufp=buf+strlen(buf);
 575         if(form->method==GET && bufp!=buf && bufp[-1]=='?') *--bufp='\0'; /* spurious ? */
 576         for(f=form->fields;f;f=f->next) switch(f->type){
 577         case TYPEIN:
 578         case PASSWD:
 579                 if(sep) *bufp++=sep;
 580                 sep='&';
 581                 bufp=ucpy(bufp, f->name);
 582                 *bufp++='=';
 583                 bufp=ucpy(bufp, plentryval(f->p));
 584                 break;
 585         case INDEX:
 586                 if(sep) *bufp++=sep;
 587                 sep='&';
 588                 bufp=ucpy(bufp, plentryval(f->p));
 589                 break;
 590         case CHECK:
 591         case RADIO:
 592                 if(!f->state) break;
 593         case HIDDEN:
 594                 if(sep) *bufp++=sep;
 595                 sep='&';
 596                 bufp=ucpy(bufp, f->name);
 597                 *bufp++='=';
 598                 bufp=ucpy(bufp, f->value);
 599                 break;
 600         case SELECT:
 601                 for(o=f->options;o;o=o->next)
 602                         if(o->selected){
 603                                 if(sep) *bufp++=sep;
 604                                 sep='&';
 605                                 bufp=ucpy(bufp, f->name);
 606                                 *bufp++='=';
 607                                 bufp=ucpy(bufp, o->value);
 608                         }
 609                 break;
 610         case TEXTWIN:
 611                 if(sep) *bufp++=sep;
 612                 sep='&';
 613                 bufp=ucpy(bufp, f->name);
 614                 *bufp++='=';
 615                 rp=pleget(f->textwin);
 616                 for(nrune=plelen(f->textwin);nrune!=0;--nrune)
 617                         bufp=runetou(bufp, *rp++);
 618                 *bufp='\0';
 619                 break;
 620         }
 621         if(form->method==GET){
 622 fprint(2, "GET %s\n", buf);
 623                 geturl(buf, GET, 0, 0, 0);
 624         }
 625         else{
 626 fprint(2, "POST %s: %s\n", form->action->fullname, buf);
 627                 geturl(form->action->fullname, POST, buf, 0, 0);
 628         }
 629         free(buf);
 630 }
 631
 632 void freeform(void *p)
 633 {
 634         Form *form;
 635         Field *f;
 636         Option *o;
 637
 638         while(form = p){
 639                 p = form->next;
 640                 free(form->action);
 641                 while(f = form->fields){
 642                         form->fields = f->next;
 643
 644                         if(f->p!=0)
 645                                 plfree(f->p);
 646
 647                         free(f->name);
 648                         free(f->value);
 649
 650                         while(o = f->options){
 651                                 f->options = o->next;
 652                                 if(o->value != o->label+1)
 653                                         free(o->value);
 654                                 free(o);
 655                         }
 656
 657                         free(f);
 658                 }
 659                 free(form);
 660         }
 661 }