src/bfu/inpfield.c

   1 /* Input field widget implementation. */
   2
   3 #ifdef HAVE_CONFIG_H
   4 #include "config.h"
   5 #endif
   6
   7 #include <errno.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "elinks.h"
  12
  13 #include "bfu/button.h"
  14 #include "bfu/dialog.h"
  15 #include "bfu/inpfield.h"
  16 #include "bfu/inphist.h"
  17 #include "bfu/msgbox.h"
  18 #include "bfu/text.h"
  19 #include "config/kbdbind.h"
  20 #include "intl/charsets.h"
  21 #include "intl/gettext/libintl.h"
  22 #include "osdep/osdep.h"
  23 #include "session/session.h"
  24 #include "terminal/draw.h"
  25 #include "terminal/kbd.h"
  26 #include "terminal/mouse.h"
  27 #include "terminal/terminal.h"
  28 #include "terminal/window.h"
  29 #include "util/color.h"
  30 #include "util/memlist.h"
  31 #include "util/memory.h"
  32
  33 #define INPUTFIELD_HEIGHT 1
  34
  35 #define INPUTFIELD_FLOATLABEL_PADDING 1
  36
  37 #define INPUTFIELD_FLOAT_SEPARATOR ":"
  38 #define INPUTFIELD_FLOAT_SEPARATOR_LEN 1
  39
  40 void
  41 add_dlg_field_do(struct dialog *dlg, enum widget_type type, unsigned char *label,
  42                  int min, int max, widget_handler_T *handler,
  43                  int datalen, void *data,
  44                  struct input_history *history, enum inpfield_flags flags)
  45 {
  46         struct widget *widget = &dlg->widgets[dlg->number_of_widgets++];
  47
  48         widget->type    = type;
  49         widget->text    = label;
  50         widget->handler = handler;
  51         widget->datalen = datalen;
  52         widget->data    = data;
  53
  54         widget->info.field.history = history;
  55         widget->info.field.flags   = flags;
  56         widget->info.field.min     = min;
  57         widget->info.field.max     = max;
  58 }
  59
  60 widget_handler_status_T
  61 check_number(struct dialog_data *dlg_data, struct widget_data *widget_data)
  62 {
  63         struct widget *widget = widget_data->widget;
  64         char *end;
  65         long l;
  66
  67         errno = 0;
  68         l = strtol(widget_data->cdata, &end, 10);
  69
  70         if (errno || !*widget_data->cdata || *end) {
  71                 info_box(dlg_data->win->term, 0,
  72                          N_("Bad number"), ALIGN_CENTER,
  73                          N_("Number expected in field"));
  74                 return EVENT_NOT_PROCESSED;
  75         }
  76
  77         if (l < widget->info.field.min || l > widget->info.field.max) {
  78                 info_box(dlg_data->win->term, MSGBOX_FREE_TEXT,
  79                          N_("Bad number"), ALIGN_CENTER,
  80                          msg_text(dlg_data->win->term,
  81                                   N_("Number should be in the range from %d to %d."),
  82                                   widget->info.field.min, widget->info.field.max));
  83                 return EVENT_NOT_PROCESSED;
  84         }
  85
  86         return EVENT_PROCESSED;
  87 }
  88
  89 widget_handler_status_T
  90 check_nonempty(struct dialog_data *dlg_data, struct widget_data *widget_data)
  91 {
  92         unsigned char *p;
  93
  94         for (p = widget_data->cdata; *p; p++)
  95                 if (*p > ' ')
  96                         return EVENT_PROCESSED;
  97
  98         info_box(dlg_data->win->term, 0,
  99                  N_("Bad string"), ALIGN_CENTER,
 100                  N_("Empty string not allowed"));
 101
 102         return EVENT_NOT_PROCESSED;
 103 }
 104
 105 void
 106 dlg_format_field(struct dialog_data *dlg_data,
 107                  struct widget_data *widget_data,
 108                  int x, int *y, int w, int *rw, enum format_align align, int format_only)
 109 {
 110         struct terminal *term = dlg_data->win->term;
 111         static int max_label_width;
 112         static int *prev_y; /* Assert the uniqueness of y */    /* TODO: get rid of this !! --Zas */
 113         unsigned char *label = widget_data->widget->text;
 114         struct color_pair *text_color = NULL;
 115         int label_width = 0;
 116         int float_label = widget_data->widget->info.field.flags & (INPFIELD_FLOAT|INPFIELD_FLOAT2);
 117
 118         if (label && *label && float_label) {
 119                 label_width = strlen(label);
 120                 if (prev_y == y) {
 121                         int_lower_bound(&max_label_width, label_width);
 122                 } else {
 123                         max_label_width = label_width;
 124                         prev_y = y;
 125                 }
 126
 127                 /* Right align the floating label up against the
 128                  * input field */
 129                 x += max_label_width - label_width;
 130                 w -= max_label_width - label_width;
 131         }
 132
 133         if (label && *label) {
 134                 if (!format_only) text_color = get_bfu_color(term, "dialog.text");
 135
 136                 dlg_format_text_do(dlg_data, label, x, y, w, rw, text_color, ALIGN_LEFT, format_only);
 137         }
 138
 139         /* XXX: We want the field and label on the same line if the terminal
 140          * width allows it. */
 141         if (label && *label && float_label) {
 142                 if (widget_data->widget->info.field.flags & INPFIELD_FLOAT) {
 143                         (*y) -= INPUTFIELD_HEIGHT;
 144                         dlg_format_text_do(dlg_data, INPUTFIELD_FLOAT_SEPARATOR,
 145                                            x + label_width, y, w, rw,
 146                                            text_color, ALIGN_LEFT, format_only);
 147                         w -= INPUTFIELD_FLOAT_SEPARATOR_LEN + INPUTFIELD_FLOATLABEL_PADDING;
 148                         x += INPUTFIELD_FLOAT_SEPARATOR_LEN + INPUTFIELD_FLOATLABEL_PADDING;
 149                 }
 150
 151                 /* FIXME: Is 5 chars for input field enough? --jonas */
 152                 if (label_width < w - 5) {
 153                         (*y) -= INPUTFIELD_HEIGHT;
 154                         w -= label_width;
 155                         x += label_width;
 156                 }
 157         }
 158
 159         if (rw) int_lower_bound(rw, int_min(w, DIALOG_MIN_WIDTH));
 160
 161         set_box(&widget_data->box, x, *y, w, INPUTFIELD_HEIGHT);
 162
 163         (*y) += INPUTFIELD_HEIGHT;
 164 }
 165
 166 static widget_handler_status_T
 167 input_field_cancel(struct dialog_data *dlg_data, struct widget_data *widget_data)
 168 {
 169         void (*fn)(void *) = widget_data->widget->data;
 170         void *data = dlg_data->dlg->udata2;
 171
 172         if (fn) fn(data);
 173
 174         return cancel_dialog(dlg_data, widget_data);
 175 }
 176
 177 static widget_handler_status_T
 178 input_field_ok(struct dialog_data *dlg_data, struct widget_data *widget_data)
 179 {
 180         void (*fn)(void *, unsigned char *) = widget_data->widget->data;
 181         void *data = dlg_data->dlg->udata2;
 182         unsigned char *text = dlg_data->widgets_data->cdata;
 183
 184         if (check_dialog(dlg_data)) return EVENT_NOT_PROCESSED;
 185
 186         if (widget_has_history(dlg_data->widgets_data))
 187                 add_to_input_history(dlg_data->dlg->widgets->info.field.history,
 188                                      text, 1);
 189
 190         if (fn) fn(data, text);
 191
 192         return cancel_dialog(dlg_data, widget_data);
 193 }
 194
 195 void
 196 input_field(struct terminal *term, struct memory_list *ml, int intl,
 197             unsigned char *title,
 198             unsigned char *text,
 199             unsigned char *okbutton,
 200             unsigned char *cancelbutton,
 201             void *data, struct input_history *history, int l,
 202             unsigned char *def, int min, int max,
 203             widget_handler_T *check,
 204             void (*fn)(void *, unsigned char *),
 205             void (*cancelfn)(void *))
 206 {
 207         struct dialog *dlg;
 208         unsigned char *field;
 209
 210         if (intl) {
 211                 title = _(title, term);
 212                 text = _(text, term);
 213                 okbutton = _(okbutton, term);
 214                 cancelbutton = _(cancelbutton, term);
 215         }
 216
 217 #define INPUT_WIDGETS_COUNT 3
 218         dlg = calloc_dialog(INPUT_WIDGETS_COUNT, l);
 219         if (!dlg) return;
 220
 221         /* @field is automatically cleared by calloc() */
 222         field = get_dialog_offset(dlg, INPUT_WIDGETS_COUNT);
 223
 224         if (def) {
 225                 int defsize = strlen(def) + 1;
 226
 227                 memcpy(field, def, (defsize > l) ? l - 1 : defsize);
 228         }
 229
 230         dlg->title = title;
 231         dlg->layouter = generic_dialog_layouter;
 232         dlg->layout.fit_datalen = 1;
 233         dlg->udata2 = data;
 234
 235         add_dlg_field(dlg, text, min, max, check, l, field, history);
 236
 237         add_dlg_button(dlg, okbutton, B_ENTER, input_field_ok, fn);
 238         add_dlg_button(dlg, cancelbutton, B_ESC, input_field_cancel, cancelfn);
 239
 240         add_dlg_end(dlg, INPUT_WIDGETS_COUNT);
 241
 242         add_to_ml(&ml, (void *) dlg, (void *) NULL);
 243         do_dialog(term, dlg, ml);
 244 }
 245
 246 void
 247 input_dialog(struct terminal *term, struct memory_list *ml,
 248              unsigned char *title,
 249              unsigned char *text,
 250              void *data, struct input_history *history, int l,
 251              unsigned char *def, int min, int max,
 252              widget_handler_T *check,
 253              void (*fn)(void *, unsigned char *),
 254              void (*cancelfn)(void *))
 255 {
 256         /* [gettext_accelerator_context(input_dialog)] */
 257         input_field(term, ml, 1, title, text, N_("~OK"), N_("~Cancel"),
 258                     data, history, l,
 259                     def, min, max,
 260                     check, fn, cancelfn);
 261 }
 262
 263 static widget_handler_status_T
 264 display_field_do(struct dialog_data *dlg_data, struct widget_data *widget_data,
 265                  int hide)
 266 {
 267         struct terminal *term = dlg_data->win->term;
 268         struct color_pair *color;
 269         int sel = is_selected_widget(dlg_data, widget_data);
 270 #ifdef CONFIG_UTF8
 271         int len = 0, left = 0;
 272 #endif /* CONFIG_UTF8 */
 273
 274 #ifdef CONFIG_UTF8
 275         if (term->utf8_cp) {
 276                 unsigned char *t = widget_data->cdata;
 277                 int p = widget_data->info.field.cpos;
 278
 279                 len = utf8_ptr2cells(t, &t[p]);
 280                 int_bounds(&left, len - widget_data->box.width + 1, len);
 281                 int_lower_bound(&left, 0);
 282                 widget_data->info.field.vpos = utf8_cells2bytes(t, left, NULL);
 283         } else
 284 #endif /* CONFIG_UTF8 */
 285         {
 286                 int_bounds(&widget_data->info.field.vpos,
 287                    widget_data->info.field.cpos - widget_data->box.width + 1,
 288                    widget_data->info.field.cpos);
 289                 int_lower_bound(&widget_data->info.field.vpos, 0);
 290         }
 291
 292         color = get_bfu_color(term, "dialog.field");
 293         if (color)
 294                 draw_box(term, &widget_data->box, ' ', 0, color);
 295
 296         color = get_bfu_color(term, "dialog.field-text");
 297         if (color) {
 298                 unsigned char *text = widget_data->cdata + widget_data->info.field.vpos;
 299                 int len, w;
 300
 301 #ifdef CONFIG_UTF8
 302                 if (term->utf8_cp && !hide)
 303                         len = utf8_ptr2cells(text, NULL);
 304                 else if (term->utf8_cp)
 305                         len = utf8_ptr2chars(text, NULL);
 306                 else
 307 #endif /* CONFIG_UTF8 */
 308                         len = strlen(text);
 309                 w = int_min(len, widget_data->box.width);
 310
 311                 if (!hide) {
 312 #ifdef CONFIG_UTF8
 313                         if (term->utf8_cp)
 314                                 w = utf8_cells2bytes(text, w, NULL);
 315 #endif /* CONFIG_UTF8 */
 316                         draw_dlg_text(term, dlg_data, widget_data->box.x, widget_data->box.y,
 317                                   text, w, 0, color);
 318                 } else {
 319                         struct box box;
 320
 321                         copy_box(&box, &widget_data->box);
 322                         box.width = w;
 323
 324                         draw_box(term, &box, '*', 0, color);
 325                 }
 326         }
 327
 328         if (sel) {
 329                 int x;
 330
 331 #ifdef CONFIG_UTF8
 332                 if (term->utf8_cp)
 333                         x = widget_data->box.x + len - left;
 334                 else
 335 #endif /* CONFIG_UTF8 */
 336                         x = widget_data->box.x + widget_data->info.field.cpos - widget_data->info.field.vpos;
 337
 338                 set_cursor(term, x, widget_data->box.y, 0);
 339                 set_window_ptr(dlg_data->win, widget_data->box.x, widget_data->box.y);
 340         }
 341
 342         return EVENT_PROCESSED;
 343 }
 344
 345 static widget_handler_status_T
 346 display_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
 347 {
 348         return display_field_do(dlg_data, widget_data, 0);
 349 }
 350
 351 static widget_handler_status_T
 352 display_field_pass(struct dialog_data *dlg_data, struct widget_data *widget_data)
 353 {
 354         return display_field_do(dlg_data, widget_data, 1);
 355 }
 356
 357 static widget_handler_status_T
 358 init_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
 359 {
 360         if (widget_has_history(widget_data)) {
 361                 struct input_history_entry *entry;
 362
 363                 foreach (entry, widget_data->widget->info.field.history->entries) {
 364                         int datalen = strlen(entry->data);
 365                         struct input_history_entry *new_entry;
 366
 367                         /* One byte is reserved in struct input_history_entry. */
 368                         new_entry = mem_alloc(sizeof(*new_entry) + datalen);
 369                         if (!new_entry) continue;
 370
 371                         memcpy(new_entry->data, entry->data, datalen + 1);
 372                         add_to_list(widget_data->info.field.history, new_entry);
 373                 }
 374         }
 375
 376         widget_data->info.field.cpos = strlen(widget_data->cdata);
 377         return EVENT_PROCESSED;
 378 }
 379
 380 static int
 381 field_prev_history(struct widget_data *widget_data)
 382 {
 383         if (widget_has_history(widget_data)
 384             && (void *) widget_data->info.field.cur_hist->prev != &widget_data->info.field.history) {
 385                 widget_data->info.field.cur_hist = widget_data->info.field.cur_hist->prev;
 386                 dlg_set_history(widget_data);
 387                 return 1;
 388         }
 389         return 0;
 390 }
 391
 392 static int
 393 field_next_history(struct widget_data *widget_data)
 394 {
 395         if (widget_has_history(widget_data)
 396             && (void *) widget_data->info.field.cur_hist != &widget_data->info.field.history) {
 397                 widget_data->info.field.cur_hist = widget_data->info.field.cur_hist->next;
 398                 dlg_set_history(widget_data);
 399                 return 1;
 400         }
 401         return 0;
 402 }
 403
 404 static widget_handler_status_T
 405 mouse_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
 406 {
 407         struct term_event *ev = dlg_data->term_event;
 408
 409         if (!check_mouse_position(ev, &widget_data->box))
 410                 return EVENT_NOT_PROCESSED;
 411
 412         /* Handle navigation through history (if any) using up/down mouse wheel */
 413         switch (get_mouse_button(ev)) {
 414         case B_WHEEL_UP:
 415                 if (check_mouse_action(ev, B_DOWN)) {
 416                         if (field_prev_history(widget_data)) {
 417                                 select_widget(dlg_data, widget_data);
 418                                 return EVENT_PROCESSED;
 419                         }
 420                 }
 421                 return EVENT_NOT_PROCESSED;
 422
 423         case B_WHEEL_DOWN:
 424                 if (check_mouse_action(ev, B_DOWN)) {
 425                         if (field_next_history(widget_data)) {
 426                                 select_widget(dlg_data, widget_data);
 427                                 return EVENT_PROCESSED;
 428                         }
 429                 }
 430                 return EVENT_NOT_PROCESSED;
 431         }
 432
 433         /* Place text cursor at mouse position and focus the widget. */
 434         widget_data->info.field.cpos = widget_data->info.field.vpos
 435                                      + ev->info.mouse.x - widget_data->box.x;
 436         int_upper_bound(&widget_data->info.field.cpos, strlen(widget_data->cdata));
 437
 438         select_widget(dlg_data, widget_data);
 439         return EVENT_PROCESSED;
 440 }
 441
 442 static widget_handler_status_T
 443 kbd_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
 444 {
 445         struct window *win = dlg_data->win;
 446         struct terminal *term = win->term;
 447         struct term_event *ev = dlg_data->term_event;
 448         action_id_T action_id;
 449
 450         action_id = kbd_action(KEYMAP_EDIT, ev, NULL);
 451         if (action_id != -1
 452             && !action_is_anonymous_safe(KEYMAP_EDIT, action_id)
 453             && get_cmd_opt_bool("anonymous"))
 454                 return EVENT_NOT_PROCESSED;
 455
 456         switch (action_id) {
 457                 case ACT_EDIT_UP:
 458                         if (!widget_has_history(widget_data))
 459                                 return EVENT_NOT_PROCESSED;
 460
 461                         if (field_prev_history(widget_data)) {
 462                                 goto display_field;
 463                         }
 464                         break;
 465
 466                 case ACT_EDIT_DOWN:
 467                         if (!widget_has_history(widget_data))
 468                                 return EVENT_NOT_PROCESSED;
 469
 470                         if (field_next_history(widget_data)) {
 471                                 goto display_field;
 472                         }
 473                         break;
 474
 475                 case ACT_EDIT_RIGHT:
 476                         if (widget_data->info.field.cpos < strlen(widget_data->cdata)) {
 477 #ifdef CONFIG_UTF8
 478                                 if (term->utf8_cp) {
 479                                         unsigned char *next = widget_data->cdata + widget_data->info.field.cpos;
 480                                         unsigned char *end = strchr(next, '\0');
 481
 482                                         utf8_to_unicode(&next, end);
 483                                         widget_data->info.field.cpos = (int)(next - widget_data->cdata);
 484                                 } else
 485 #endif /* CONFIG_UTF8 */
 486                                 {
 487                                         widget_data->info.field.cpos++;
 488                                 }
 489                         }
 490                         goto display_field;
 491
 492                 case ACT_EDIT_LEFT:
 493                         if (widget_data->info.field.cpos > 0)
 494                                 widget_data->info.field.cpos--;
 495 #ifdef CONFIG_UTF8
 496                         if (widget_data->info.field.cpos && term->utf8_cp) {
 497                                 unsigned char *t = widget_data->cdata;
 498                                 unsigned char *t2 = t;
 499                                 int p = widget_data->info.field.cpos;
 500                                 unsigned char tmp = t[p];
 501
 502                                 t[p] = '\0';
 503                                 strlen_utf8(&t2);
 504                                 t[p] = tmp;
 505                                 widget_data->info.field.cpos = (int)(t2 - t);
 506
 507                         }
 508 #endif /* CONFIG_UTF8 */
 509                         goto display_field;
 510
 511                 case ACT_EDIT_HOME:
 512                         widget_data->info.field.cpos = 0;
 513                         goto display_field;
 514
 515                 case ACT_EDIT_END:
 516                         widget_data->info.field.cpos = strlen(widget_data->cdata);
 517                         goto display_field;
 518
 519                 case ACT_EDIT_BACKSPACE:
 520 #ifdef CONFIG_UTF8
 521                         if (widget_data->info.field.cpos && term->utf8_cp) {
 522                                 /* XXX: stolen from src/viewer/text/form.c */
 523                                 /* FIXME: This isn't nice. We remove last byte
 524                                  *        from UTF-8 character to detect
 525                                  *        character before it. */
 526                                 unsigned char *text = widget_data->cdata;
 527                                 unsigned char *end = widget_data->cdata + widget_data->info.field.cpos - 1;
 528                                 unicode_val_T data;
 529                                 int old = widget_data->info.field.cpos;
 530
 531                                 while(1) {
 532                                         data = utf8_to_unicode(&text, end);
 533                                         if (data == UCS_NO_CHAR)
 534                                                 break;
 535                                 }
 536
 537                                 widget_data->info.field.cpos = (int)(text - widget_data->cdata);
 538                                 if (old != widget_data->info.field.cpos) {
 539                                         int length;
 540
 541                                         text = widget_data->cdata;
 542                                         length = strlen(text + old) + 1;
 543                                         memmove(text + widget_data->info.field.cpos, text + old, length);
 544                                 }
 545                                 goto display_field;
 546                         }
 547 #endif /* CONFIG_UTF8 */
 548                         if (widget_data->info.field.cpos) {
 549                                 memmove(widget_data->cdata + widget_data->info.field.cpos - 1,
 550                                         widget_data->cdata + widget_data->info.field.cpos,
 551                                         strlen(widget_data->cdata) - widget_data->info.field.cpos + 1);
 552                                 widget_data->info.field.cpos--;
 553                         }
 554                         goto display_field;
 555
 556                 case ACT_EDIT_DELETE:
 557                         {
 558                                 int cdata_len = strlen(widget_data->cdata);
 559
 560                                 if (widget_data->info.field.cpos >= cdata_len) goto display_field;
 561
 562 #ifdef CONFIG_UTF8
 563                                 if (term->utf8_cp) {
 564                                         unsigned char *end = widget_data->cdata + cdata_len;
 565                                         unsigned char *text = widget_data->cdata + widget_data->info.field.cpos;
 566                                         unsigned char *old = text;
 567
 568                                         utf8_to_unicode(&text, end);
 569                                         if (old != text) {
 570                                                 memmove(old, text,
 571                                                                 (int)(end - text) + 1);
 572                                         }
 573                                         goto display_field;
 574                                 }
 575 #endif /* CONFIG_UTF8 */
 576                                 memmove(widget_data->cdata + widget_data->info.field.cpos,
 577                                         widget_data->cdata + widget_data->info.field.cpos + 1,
 578                                         cdata_len - widget_data->info.field.cpos + 1);
 579                                 goto display_field;
 580                         }
 581
 582                 case ACT_EDIT_KILL_TO_BOL:
 583                         memmove(widget_data->cdata,
 584                                         widget_data->cdata + widget_data->info.field.cpos,
 585                                         strlen(widget_data->cdata + widget_data->info.field.cpos) + 1);
 586                         widget_data->info.field.cpos = 0;
 587                         goto display_field;
 588
 589                 case ACT_EDIT_KILL_TO_EOL:
 590                         widget_data->cdata[widget_data->info.field.cpos] = 0;
 591                         goto display_field;
 592
 593                 case ACT_EDIT_KILL_WORD_BACK:
 594                         {
 595                                 int cdata_len = strlen(widget_data->cdata);
 596                                 int start = widget_data->info.field.cpos;
 597
 598                                 while (start > 0 && isspace(widget_data->cdata[start - 1]))
 599                                         --start;
 600                                 while (start > 0 && !isspace(widget_data->cdata[start - 1]))
 601                                         --start;
 602
 603                                 memmove(widget_data->cdata + start,
 604                                         widget_data->cdata + widget_data->info.field.cpos,
 605                                         cdata_len - widget_data->info.field.cpos + 1);
 606
 607                                 widget_data->info.field.cpos = start;
 608
 609                                 goto display_field;
 610                         }
 611
 612                 case ACT_EDIT_MOVE_BACKWARD_WORD:
 613                         while (widget_data->info.field.cpos > 0 && isspace(widget_data->cdata[widget_data->info.field.cpos - 1]))
 614                                 --widget_data->info.field.cpos;
 615                         while (widget_data->info.field.cpos > 0 && !isspace(widget_data->cdata[widget_data->info.field.cpos - 1]))
 616                                 --widget_data->info.field.cpos;
 617
 618                         goto display_field;
 619
 620                 case ACT_EDIT_MOVE_FORWARD_WORD:
 621                         while (isspace(widget_data->cdata[widget_data->info.field.cpos]))
 622                                 ++widget_data->info.field.cpos;
 623                         while (widget_data->cdata[widget_data->info.field.cpos] && !isspace(widget_data->cdata[widget_data->info.field.cpos]))
 624                                 ++widget_data->info.field.cpos;
 625                         while (isspace(widget_data->cdata[widget_data->info.field.cpos]))
 626                                 ++widget_data->info.field.cpos;
 627
 628                         goto display_field;
 629
 630                 case ACT_EDIT_COPY_CLIPBOARD:
 631                         /* Copy to clipboard */
 632                         set_clipboard_text(widget_data->cdata);
 633                         return EVENT_PROCESSED;
 634
 635                 case ACT_EDIT_CUT_CLIPBOARD:
 636                         /* Cut to clipboard */
 637                         set_clipboard_text(widget_data->cdata);
 638                         widget_data->cdata[0] = 0;
 639                         widget_data->info.field.cpos = 0;
 640                         goto display_field;
 641
 642                 case ACT_EDIT_PASTE_CLIPBOARD:
 643                         {
 644                                 /* Paste from clipboard */
 645                                 unsigned char *clipboard = get_clipboard_text();
 646
 647                                 if (!clipboard) goto display_field;
 648
 649                                 safe_strncpy(widget_data->cdata, clipboard, widget_data->widget->datalen);
 650                                 widget_data->info.field.cpos = strlen(widget_data->cdata);
 651                                 mem_free(clipboard);
 652                                 goto display_field;
 653                         }
 654
 655                 case ACT_EDIT_AUTO_COMPLETE:
 656                         if (!widget_has_history(widget_data))
 657                                 return EVENT_NOT_PROCESSED;
 658
 659                         do_tab_compl(dlg_data, &widget_data->info.field.history);
 660                         goto display_field;
 661
 662                 case ACT_EDIT_AUTO_COMPLETE_FILE:
 663                         if (!widget_has_history(widget_data))
 664                                 return EVENT_NOT_PROCESSED;
 665
 666                         do_tab_compl_file(dlg_data, &widget_data->info.field.history);
 667                         goto display_field;
 668
 669                 case ACT_EDIT_AUTO_COMPLETE_UNAMBIGUOUS:
 670                         if (!widget_has_history(widget_data))
 671                                 return EVENT_NOT_PROCESSED;
 672
 673                         do_tab_compl_unambiguous(dlg_data, &widget_data->info.field.history);
 674                         goto display_field;
 675
 676                 case ACT_EDIT_REDRAW:
 677                         redraw_terminal_cls(term);
 678                         return EVENT_PROCESSED;
 679
 680                 default:
 681                         if (check_kbd_textinput_key(ev)) {
 682                                 unsigned char *text = widget_data->cdata;
 683                                 int textlen = strlen(text);
 684 #ifndef CONFIG_UTF8
 685                                 /* Both get_kbd_key(ev) and @text
 686                                  * are in the terminal's charset.  */
 687                                 const int inslen = 1;
 688 #else  /* CONFIG_UTF8 */
 689                                 const unsigned char *ins;
 690                                 int inslen;
 691
 692                                 /* get_kbd_key(ev) is UCS-4, and @text
 693                                  * is in the terminal's charset.  */
 694                                 ins = u2cp_no_nbsp(get_kbd_key(ev),
 695                                                    get_opt_codepage_tree(term->spec,
 696                                                                          "charset",
 697                                                                          NULL));
 698                                 inslen = strlen(ins);
 699 #endif /* CONFIG_UTF8 */
 700
 701                                 if (textlen >= widget_data->widget->datalen - inslen)
 702                                         goto display_field;
 703
 704                                 /* Shift to position of the cursor */
 705                                 textlen -= widget_data->info.field.cpos;
 706                                 text    += widget_data->info.field.cpos;
 707
 708                                 memmove(text + inslen, text, textlen + 1);
 709 #ifdef CONFIG_UTF8
 710                                 memcpy(text, ins, inslen);
 711 #else  /* !CONFIG_UTF8 */
 712                                 *text = get_kbd_key(ev);
 713 #endif /* !CONFIG_UTF8 */
 714                                 widget_data->info.field.cpos += inslen;
 715                                 goto display_field;
 716                         }
 717         }
 718         return EVENT_NOT_PROCESSED;
 719
 720 display_field:
 721         display_widget(dlg_data, widget_data);
 722         redraw_from_window(dlg_data->win);
 723         return EVENT_PROCESSED;
 724 }
 725
 726
 727 static widget_handler_status_T
 728 clear_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
 729 {
 730         widget_data->info.field.cpos = 0;
 731
 732         if (widget_data->widget->datalen)
 733                 memset(widget_data->cdata, 0, widget_data->widget->datalen);
 734
 735         return EVENT_PROCESSED;
 736 }
 737
 738 const struct widget_ops field_ops = {
 739         display_field,
 740         init_field,
 741         mouse_field,
 742         kbd_field,
 743         NULL,
 744         clear_field,
 745 };
 746
 747 const struct widget_ops field_pass_ops = {
 748         display_field_pass,
 749         init_field,
 750         mouse_field,
 751         kbd_field,
 752         NULL,
 753         clear_field,
 754 };
 755
 756
 757 /* Input lines */
 758
 759 static void
 760 input_line_layouter(struct dialog_data *dlg_data)
 761 {
 762         struct input_line *input_line = dlg_data->dlg->udata;
 763         struct session *ses = input_line->ses;
 764         struct window *win = dlg_data->win;
 765         int y = win->term->height - 1
 766                 - ses->status.show_status_bar
 767                 - ses->status.show_tabs_bar;
 768
 769         dlg_format_field(dlg_data, dlg_data->widgets_data, 0,
 770                          &y, win->term->width, NULL, ALIGN_LEFT, 0);
 771 }
 772
 773 static widget_handler_status_T
 774 input_line_event_handler(struct dialog_data *dlg_data)
 775 {
 776         struct input_line *input_line = dlg_data->dlg->udata;
 777         input_line_handler_T handler = input_line->handler;
 778         enum edit_action action_id;
 779         struct widget_data *widget_data = dlg_data->widgets_data;
 780         struct term_event *ev = dlg_data->term_event;
 781
 782         /* Noodle time */
 783         switch (ev->ev) {
 784         case EVENT_KBD:
 785                 action_id = kbd_action(KEYMAP_EDIT, ev, NULL);
 786
 787                 /* Handle some basic actions such as quiting for empty buffers */
 788                 switch (action_id) {
 789                 case ACT_EDIT_ENTER:
 790                 case ACT_EDIT_NEXT_ITEM:
 791                 case ACT_EDIT_PREVIOUS_ITEM:
 792                         if (widget_has_history(widget_data))
 793                                 add_to_input_history(widget_data->widget->info.field.history,
 794                                                      input_line->buffer, 1);
 795                         break;
 796
 797                 case ACT_EDIT_BACKSPACE:
 798                         if (!*input_line->buffer)
 799                                 goto cancel_input_line;
 800                         break;
 801
 802                 case ACT_EDIT_CANCEL:
 803                         goto cancel_input_line;
 804
 805                 default:
 806                         break;
 807                 }
 808
 809                 /* First let the input field do its business */
 810                 kbd_field(dlg_data, widget_data);
 811                 break;
 812
 813         case EVENT_MOUSE:
 814 #ifdef CONFIG_MOUSE
 815                 if (ev->info.mouse.y != dlg_data->win->y) {
 816                         delete_window_ev(dlg_data->win, ev);
 817                         return EVENT_PROCESSED;
 818                 }
 819 #endif /* CONFIG_MOUSE */
 820                 return EVENT_NOT_PROCESSED;
 821
 822         case EVENT_REDRAW:
 823                 /* Try to catch the redraw event initiated by the history
 824                  * completion and only respond if something was actually
 825                  * updated. Meaning we have new data in the line buffer that
 826                  * should be propagated to the line handler. */
 827                 if (!widget_has_history(widget_data)
 828                     || widget_data->info.field.cpos <= 0
 829                     || widget_data->info.field.cpos <= strlen(input_line->buffer))
 830                         return EVENT_NOT_PROCESSED;
 831
 832                 /* Fall thru */
 833
 834         case EVENT_RESIZE:
 835                 action_id = ACT_EDIT_REDRAW;
 836                 break;
 837
 838         default:
 839                 return EVENT_NOT_PROCESSED;
 840         }
 841
 842         update_dialog_data(dlg_data);
 843
 844 send_action_to_handler:
 845         /* Then pass it on to the specialized handler */
 846         switch (handler(input_line, action_id)) {
 847         case INPUT_LINE_CANCEL:
 848 cancel_input_line:
 849                 cancel_dialog(dlg_data, widget_data);
 850                 break;
 851
 852         case INPUT_LINE_REWIND:
 853                 /* This is stolen kbd_field() handling for ACT_EDIT_BACKSPACE */
 854                 memmove(widget_data->cdata + widget_data->info.field.cpos - 1,
 855                         widget_data->cdata + widget_data->info.field.cpos,
 856                         strlen(widget_data->cdata) - widget_data->info.field.cpos + 1);
 857                 widget_data->info.field.cpos--;
 858
 859                 update_dialog_data(dlg_data);
 860
 861                 goto send_action_to_handler;
 862
 863         case INPUT_LINE_PROCEED:
 864                 break;
 865         }
 866
 867         /* Hack: We want our caller to perform its redrawing routine,
 868          * even if we did process the event here. */
 869         if (action_id == ACT_EDIT_REDRAW) return EVENT_NOT_PROCESSED;
 870
 871         /* Completely bypass any further dialog event handling */
 872         return EVENT_PROCESSED;
 873 }
 874
 875 void
 876 input_field_line(struct session *ses, unsigned char *prompt, void *data,
 877                  struct input_history *history, input_line_handler_T handler)
 878 {
 879         struct dialog *dlg;
 880         unsigned char *buffer;
 881         struct input_line *input_line;
 882
 883         assert(ses);
 884
 885         dlg = calloc_dialog(INPUT_LINE_WIDGETS, sizeof(*input_line));
 886         if (!dlg) return;
 887
 888         input_line = (void *) get_dialog_offset(dlg, INPUT_LINE_WIDGETS);
 889         input_line->ses = ses;
 890         input_line->data = data;
 891         input_line->handler = handler;
 892         buffer = input_line->buffer;
 893
 894         dlg->handle_event = input_line_event_handler;
 895         dlg->layouter = input_line_layouter;
 896         dlg->layout.only_widgets = 1;
 897         dlg->udata = input_line;
 898
 899         add_dlg_field_float2(dlg, prompt, 0, 0, NULL, INPUT_LINE_BUFFER_SIZE,
 900                              buffer, history);
 901
 902         do_dialog(ses->tab->term, dlg, getml(dlg, (void *) NULL));
 903 }