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         char *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         BUTTON,
  47         SELECT,
  48         TEXTWIN,
  49         HIDDEN,
  50         INDEX,
  51 };
  52 struct Option{
  53         int selected;
  54         int def;
  55         char label[NLABEL+1];
  56         char *value;
  57         Option *next;
  58 };
  59 void h_checkinput(Panel *, int, int);
  60 void h_radioinput(Panel *, int, int);
  61 void h_submitinput(Panel *, int);
  62 void h_buttoninput(Panel *, int);
  63 void h_submittype(Panel *, char *);
  64 void h_submitindex(Panel *, char *);
  65 void h_resetinput(Panel *, int);
  66 void h_select(Panel *, int, int);
  67 char *selgen(Panel *, int);
  68 char *nullgen(Panel *, int);
  69 Field *newfield(Form *form){
  70         Field *f;
  71         f=emallocz(sizeof(Field), 1);
  72         if(form->efields==0)
  73                 form->fields=f;
  74         else
  75                 form->efields->next=f;
  76         form->efields=f;
  77         f->next=0;
  78         f->form=form;
  79         return f;
  80 }
  81 /*
  82  * Called by rdhtml on seeing a forms-related tag
  83  */
  84 void rdform(Hglob *g){
  85         char *s;
  86         Field *f;
  87         Option *o, **op;
  88         Form *form;
  89         switch(g->tag){
  90         default:
  91                 fprint(2, "Bad tag <%s> in rdform (Can't happen!)\n", g->token);
  92                 return;
  93         case Tag_form:
  94                 if(g->form){
  95                         htmlerror(g->name, g->lineno, "nested forms illegal\n");
  96                         break;
  97                 }
  98                 g->form=emallocz(sizeof(Form), 1);
  99                 s=pl_getattr(g->attr, "action");
 100                 g->form->action=strdup((s && s[0]) ? s : g->dst->url->fullname);
 101                 s=pl_getattr(g->attr, "method");
 102                 if(s==0)
 103                         g->form->method=GET;
 104                 else if(cistrcmp(s, "post")==0)
 105                         g->form->method=POST;
 106                 else{
 107                         if(cistrcmp(s, "get")!=0)
 108                                 htmlerror(g->name, g->lineno,
 109                                         "unknown form method %s\n", s);
 110                         g->form->method=GET;
 111                 }
 112                 g->form->fields=0;
 113
 114                 g->form->next = g->dst->form;
 115                 g->dst->form = g->form;
 116
 117                 break;
 118         case Tag_input:
 119         case Tag_button:
 120                 if(g->form==0){
 121                 BadTag:
 122                         htmlerror(g->name, g->lineno, "<%s> not in form, ignored\n",
 123                                 tag[g->tag].name);
 124                         break;
 125                 }
 126                 f=newfield(g->form);
 127                 s=pl_getattr(g->attr, "name");
 128                 if(s==0)
 129                         f->name=0;
 130                 else
 131                         f->name=strdup(s);
 132                 s=pl_getattr(g->attr, "value");
 133                 if(s==0)
 134                         f->value=strdup("");
 135                 else
 136                         f->value=strdup(s);
 137                 f->checked=pl_hasattr(g->attr, "checked");
 138                 s=pl_getattr(g->attr, "size");
 139                 if(s==0)
 140                         f->size=20;
 141                 else
 142                         f->size=atoi(s);
 143                 s=pl_getattr(g->attr, "maxlength");
 144                 if(s==0)
 145                         f->maxlength=0x3fffffff;
 146                 else
 147                         f->maxlength=atoi(s);
 148                 s=pl_getattr(g->attr, "type");
 149                 if((g->tag == Tag_button) &&
 150                    (s==0 || cistrcmp(s, "reset") || cistrcmp(s, "button")))
 151                         s="submit";
 152                 else if(s==0)
 153                         s="text";
 154                 if(cistrcmp(s, "checkbox")==0)
 155                         f->type=CHECK;
 156                 else if(cistrcmp(s, "radio")==0)
 157                         f->type=RADIO;
 158                 else if(cistrcmp(s, "submit")==0)
 159                         f->type=SUBMIT;
 160                 else if(cistrcmp(s, "button")==0)
 161                         f->type=BUTTON;
 162                 else if(cistrcmp(s, "image")==0){
 163                         /* presotto's egregious hack to make image submits do something */
 164                         if(f->name){
 165                                 free(f->name);
 166                                 f->name=0;
 167                         }
 168                         f->type=SUBMIT;
 169                 } else if(cistrcmp(s, "reset")==0)
 170                         f->type=RESET;
 171                 else if(cistrcmp(s, "hidden")==0)
 172                         f->type=HIDDEN;
 173                 else{
 174                         f->type=TYPEIN;
 175                         if(cistrcmp(s, "password")==0)
 176                                 f->type=PASSWD;
 177
 178                         s=f->name;
 179                         if(s && cistrcmp(s, "isindex")==0)
 180                                 f->type=INDEX;
 181
 182                         /*
 183                          * If there's exactly one attribute, use its value as the name,
 184                          * regardless of the attribute name.  This makes
 185                          * http://linus.att.com/ias/puborder.html work.
 186                          */
 187                         if(s==0){
 188                                 if(g->attr[0].name && g->attr[1].name==0)
 189                                         f->name=strdup(g->attr[0].value);
 190                                 else
 191                                         f->name=strdup("no-name");
 192                         }
 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                 if((f=g->form->efields)==0) goto BadTag;
 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                 s=pl_getattr(g->attr, "action");
 272                 form->action=strdup((s && s[0]) ? s : g->dst->url->fullname);
 273                 form->method=GET;
 274                 form->fields=0;
 275                 f=newfield(form);
 276                 f->name=0;
 277                 f->value=strdup("");
 278                 f->size=20;
 279                 f->maxlength=0x3fffffff;
 280                 f->type=INDEX;
 281                 pl_htmloutput(g, g->nsp, f->value[0]?f->value:"blank field", f);
 282                 break;
 283         }
 284 }
 285 /*
 286  * Called by rdhtml on seeing a forms-related end tag
 287  */
 288 void endform(Hglob *g){
 289         Field *f;
 290
 291         switch(g->tag){
 292         case Tag_form:
 293                 g->form=0;
 294                 break;
 295         case Tag_select:
 296                 if(g->form==0)
 297                         htmlerror(g->name, g->lineno, "</select> not in form, ignored\n");
 298                 else if((f=g->form->efields)==0)
 299                         htmlerror(g->name, g->lineno, "spurious </select>\n");
 300                 else
 301                         pl_htmloutput(g, g->nsp, f->name, f);
 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 PASSWD:
 343                 f->p=plentry(0, USERFL, f->size*chrwidth, f->value, h_submittype);
 344                 break;
 345         case CHECK:
 346                 f->p=plcheckbutton(0, 0, "", h_checkinput);
 347                 f->state=f->checked;
 348                 plsetbutton(f->p, f->checked);
 349                 break;
 350         case RADIO:
 351                 f->p=plradiobutton(0, 0, "", h_radioinput);
 352                 f->state=f->checked;
 353                 plsetbutton(f->p, f->checked);
 354                 break;
 355         case SUBMIT:
 356                 f->p=plbutton(0, 0, f->value[0]?f->value:"submit", h_submitinput);
 357                 break;
 358         case RESET:
 359                 f->p=plbutton(0, 0, f->value[0]?f->value:"reset", h_resetinput);
 360                 break;
 361         case BUTTON:
 362                 f->p=plbutton(0, 0, f->value[0]?f->value:"button", h_buttoninput);
 363                 break;
 364         case SELECT:
 365                 f->pulldown=plgroup(0,0);
 366                 scrl=plscrollbar(f->pulldown, PACKW|FILLY);
 367                 win=pllist(f->pulldown, PACKN, nullgen, f->size, h_select);
 368                 win->userp=f;
 369                 plinitlist(win, PACKN, selgen, f->size, h_select);
 370                 plscroll(win, 0, scrl);
 371                 plpack(f->pulldown, Rect(0,0,1024,1024));
 372                 f->p=plpulldown(0, FIXEDX, seloption(f), f->pulldown, PACKS);
 373                 f->p->fixedsize.x=f->pulldown->r.max.x-f->pulldown->r.min.x;
 374                 break;
 375         case TEXTWIN:
 376                 f->p=plframe(0,0);
 377                 pllabel(f->p, PACKN|FILLX, f->name);
 378                 scrl=plscrollbar(f->p, PACKW|FILLY);
 379                 f->textwin=pledit(f->p, EXPAND, Pt(f->cols*chrwidth, f->rows*font->height),
 380                         0, 0, 0);
 381                 f->textwin->userp=f;
 382                 plscroll(f->textwin, 0, scrl);
 383                 break;
 384         case INDEX:
 385                 f->p=plentry(0, 0, f->size*chrwidth, f->value, h_submitindex);
 386                 break;
 387         }
 388         if(f->p){
 389                 f->p->userp=f;
 390                 free(t->text);
 391                 t->text=0;
 392                 t->p=f->p;
 393                 t->hot=1;
 394         }
 395 }
 396 void h_checkinput(Panel *p, int, int v){
 397         ((Field *)p->userp)->state=v;
 398 }
 399 void h_radioinput(Panel *p, int, int v){
 400         Field *f, *me;
 401         me=p->userp;
 402         me->state=v;
 403         if(v){
 404                 for(f=me->form->fields;f;f=f->next)
 405                         if(f->type==RADIO && f!=me && strcmp(f->name, me->name)==0){
 406                                 plsetbutton(f->p, 0);
 407                                 f->state=0;
 408                                 pldraw(f->p, screen);
 409                         }
 410         }
 411 }
 412 void h_select(Panel *p, int, int index){
 413         Option *a;
 414         Field *f;
 415         f=p->userp;
 416         if(f==0) return;
 417         if(!f->multiple) for(a=f->options;a;a=a->next) a->selected=0;
 418         for(a=f->options;index!=0 && a!=0;--index,a=a->next);
 419         if(a==0) return;
 420         a->selected=!a->selected;
 421         plinitpulldown(f->p, FIXEDX, seloption(f), f->pulldown, PACKS);
 422         pldraw(f->p, screen);
 423 }
 424 void h_resetinput(Panel *p, int){
 425         Field *f;
 426         Option *o;
 427         for(f=((Field *)p->userp)->form->fields;f;f=f->next) switch(f->type){
 428         case TYPEIN:
 429                 plinitentry(f->p, 0, f->size*chrwidth, f->value, 0);
 430                 break;
 431         case PASSWD:
 432                 plinitentry(f->p, USERFL, 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_buttoninput(Panel *p, int){
 447 }
 448 int ulen(char *s){
 449         int len;
 450         len=0;
 451         for(;*s;s++){
 452                 if(strchr("/$-_@.!*'(), ", *s)
 453                 || 'a'<=*s && *s<='z'
 454                 || 'A'<=*s && *s<='Z'
 455                 || '0'<=*s && *s<='9')
 456                         len++;
 457                 else
 458                         len+=3;
 459         }
 460         return len;
 461 }
 462 int hexdigit(int v){
 463         return 0<=v && v<=9?'0'+v:'A'+v-10;
 464 }
 465 char *ucpy(char *buf, char *s){
 466         for(;*s;s++){
 467                 if(strchr("/$-_@.!*'(),", *s)
 468                 || 'a'<=*s && *s<='z'
 469                 || 'A'<=*s && *s<='Z'
 470                 || '0'<=*s && *s<='9')
 471                         *buf++=*s;
 472                 else if(*s==' ')
 473                         *buf++='+';
 474                 else{
 475                         *buf++='%';
 476                         *buf++=hexdigit((*s>>4)&15);
 477                         *buf++=hexdigit(*s&15);
 478                 }
 479         }
 480         *buf='\0';
 481         return buf;
 482 }
 483 char *runetou(char *buf, Rune r){
 484         char rbuf[2];
 485         if(r<=255){
 486                 rbuf[0]=r;
 487                 rbuf[1]='\0';
 488                 buf=ucpy(buf, rbuf);
 489         }
 490         return buf;
 491 }
 492 /*
 493  * If there's exactly one button with type=text, then
 494  * a CR in the button is supposed to submit the form.
 495  */
 496 void h_submittype(Panel *p, char *){
 497         int ntype;
 498         Field *f;
 499         ntype=0;
 500         for(f=((Field *)p->userp)->form->fields;f;f=f->next)
 501                 if(f->type==TYPEIN || f->type==PASSWD)
 502                         ntype++;
 503         if(ntype==1) h_submitinput(p, 0);
 504 }
 505 void h_submitindex(Panel *p, char *){
 506         h_submitinput(p, 0);
 507 }
 508 void h_submitinput(Panel *p, int){
 509         Form *form;
 510         int size, nrune;
 511         char *buf, *bufp, sep;
 512         Rune *rp;
 513         Field *f;
 514         Option *o;
 515         form=((Field *)p->userp)->form;
 516         if(form->method==GET) size=ulen(form->action)+1;
 517         else size=1;
 518         for(f=form->fields;f;f=f->next) switch(f->type){
 519         case TYPEIN:
 520         case PASSWD:
 521                 if(f->name==0)
 522                         continue;
 523                 size+=ulen(f->name)+1+ulen(plentryval(f->p))+1;
 524                 break;
 525         case INDEX:
 526                 size+=ulen(plentryval(f->p))+1;
 527                 break;
 528         case CHECK:
 529         case RADIO:
 530                 if(!f->state) break;
 531         case HIDDEN:
 532                 if(f->name==0 || f->value==0)
 533                         continue;
 534                 size+=ulen(f->name)+1+ulen(f->value)+1;
 535                 break;
 536         case SELECT:
 537                 if(f->name==0)
 538                         continue;
 539                 for(o=f->options;o;o=o->next)
 540                         if(o->selected && o->value)
 541                                 size+=ulen(f->name)+1+ulen(o->value)+1;
 542                 break;
 543         case TEXTWIN:
 544                 if(f->name==0)
 545                         continue;
 546                 size+=ulen(f->name)+1+plelen(f->textwin)*3+1;
 547                 break;
 548         }
 549         buf=emalloc(size);
 550         if(form->method==GET){
 551                 strcpy(buf, form->action);
 552                 sep='?';
 553         }
 554         else{
 555                 buf[0]='\0';
 556                 sep=0;
 557         }
 558         bufp=buf+strlen(buf);
 559         if(form->method==GET && bufp!=buf && bufp[-1]=='?') *--bufp='\0'; /* spurious ? */
 560         for(f=form->fields;f;f=f->next) switch(f->type){
 561         case TYPEIN:
 562         case PASSWD:
 563                 if(f->name==0)
 564                         continue;
 565                 if(sep) *bufp++=sep;
 566                 sep='&';
 567                 bufp=ucpy(bufp, f->name);
 568                 *bufp++='=';
 569                 bufp=ucpy(bufp, plentryval(f->p));
 570                 break;
 571         case INDEX:
 572                 if(sep) *bufp++=sep;
 573                 sep='&';
 574                 bufp=ucpy(bufp, plentryval(f->p));
 575                 break;
 576         case CHECK:
 577         case RADIO:
 578                 if(!f->state) break;
 579         case HIDDEN:
 580                 if(f->name==0 || f->value==0)
 581                         continue;
 582                 if(sep) *bufp++=sep;
 583                 sep='&';
 584                 bufp=ucpy(bufp, f->name);
 585                 *bufp++='=';
 586                 bufp=ucpy(bufp, f->value);
 587                 break;
 588         case SELECT:
 589                 if(f->name==0)
 590                         continue;
 591                 for(o=f->options;o;o=o->next)
 592                         if(o->selected && o->value){
 593                                 if(sep) *bufp++=sep;
 594                                 sep='&';
 595                                 bufp=ucpy(bufp, f->name);
 596                                 *bufp++='=';
 597                                 bufp=ucpy(bufp, o->value);
 598                         }
 599                 break;
 600         case TEXTWIN:
 601                 if(f->name==0)
 602                         continue;
 603                 if(sep) *bufp++=sep;
 604                 sep='&';
 605                 bufp=ucpy(bufp, f->name);
 606                 *bufp++='=';
 607                 rp=pleget(f->textwin);
 608                 for(nrune=plelen(f->textwin);nrune!=0;--nrune)
 609                         bufp=runetou(bufp, *rp++);
 610                 *bufp='\0';
 611                 break;
 612         }
 613         if(form->method==GET){
 614                 if(debug)fprint(2, "GET %s\n", buf);
 615                 geturl(buf, GET, 0, 0, 0);
 616         }
 617         else{
 618                 if(debug)fprint(2, "POST %s: %s\n", form->action, buf);
 619                 geturl(form->action, POST, buf, 0, 0);
 620         }
 621         free(buf);
 622 }
 623
 624 void freeform(void *p)
 625 {
 626         Form *form;
 627         Field *f;
 628         Option *o;
 629
 630         while(form = p){
 631                 p = form->next;
 632                 free(form->action);
 633                 while(f = form->fields){
 634                         form->fields = f->next;
 635
 636                         if(f->p!=0)
 637                                 plfree(f->p);
 638
 639                         free(f->name);
 640                         free(f->value);
 641
 642                         while(o = f->options){
 643                                 f->options = o->next;
 644                                 if(o->value != o->label+1)
 645                                         free(o->value);
 646                                 free(o);
 647                         }
 648
 649                         free(f);
 650                 }
 651                 free(form);
 652         }
 653 }