Dogcows Code - chaz/openbox/blob - openbox/prompt.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    prompt.c for the Openbox window manager
   4    Copyright (c) 2008        Dana Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "prompt.h"
  20 #include "openbox.h"
  21 #include "screen.h"
  22 #include "client.h"
  23 #include "group.h"
  24 #include "event.h"
  25 #include "obt/display.h"
  26 #include "obt/keyboard.h"
  27 #include "obt/prop.h"
  28 #include "gettext.h"
  29
  30 static GList *prompt_list = NULL;
  31
  32 /* we construct these */
  33 static RrAppearance *prompt_a_bg;
  34 static RrAppearance *prompt_a_button;
  35 static RrAppearance *prompt_a_focus;
  36 static RrAppearance *prompt_a_press;
  37 static RrAppearance *prompt_a_pfocus;
  38 /* we change the max width which would screw with others */
  39 static RrAppearance *prompt_a_msg;
  40
  41 /* sizing stuff */
  42 #define OUTSIDE_MARGIN 4
  43 #define MSG_BUTTON_SEPARATION 4
  44 #define BUTTON_SEPARATION 4
  45 #define BUTTON_VMARGIN 4
  46 #define BUTTON_HMARGIN 12
  47 #define MAX_WIDTH 400
  48
  49 static void prompt_layout(ObPrompt *self);
  50 static void render_all(ObPrompt *self);
  51 static void render_button(ObPrompt *self, ObPromptElement *e);
  52 static void prompt_resize(ObPrompt *self, gint w, gint h);
  53
  54 void prompt_startup(gboolean reconfig)
  55 {
  56     RrColor *c_button, *c_focus, *c_press, *c_pfocus;
  57
  58     /* note: this is not a copy, don't free it */
  59     prompt_a_bg = ob_rr_theme->osd_hilite_bg;
  60
  61     prompt_a_button = RrAppearanceCopy(ob_rr_theme->a_focused_unpressed_close);
  62     prompt_a_focus = RrAppearanceCopy(ob_rr_theme->a_hover_focused_close);
  63     prompt_a_press = RrAppearanceCopy(ob_rr_theme->a_focused_pressed_close);
  64     prompt_a_pfocus = RrAppearanceCopy(ob_rr_theme->a_focused_pressed_close);
  65
  66     c_button = prompt_a_button->texture[0].data.mask.color;
  67     c_focus = prompt_a_focus->texture[0].data.mask.color;
  68     c_press = prompt_a_press->texture[0].data.mask.color;
  69     c_pfocus = prompt_a_press->texture[0].data.mask.color;
  70
  71     RrAppearanceRemoveTextures(prompt_a_button);
  72     RrAppearanceRemoveTextures(prompt_a_focus);
  73     RrAppearanceRemoveTextures(prompt_a_press);
  74     RrAppearanceRemoveTextures(prompt_a_pfocus);
  75
  76     /* texture[0] is the text and texture[1-4] (for prompt_a_focus and
  77        prompt_a_pfocus) is lineart to show where keyboard focus is */
  78     RrAppearanceAddTextures(prompt_a_button, 1);
  79     RrAppearanceAddTextures(prompt_a_focus, 5);
  80     RrAppearanceAddTextures(prompt_a_press, 1);
  81     RrAppearanceAddTextures(prompt_a_pfocus, 5);
  82
  83     /* totally cheating here.. */
  84     prompt_a_button->texture[0] = ob_rr_theme->osd_hilite_label->texture[0];
  85     prompt_a_focus->texture[0] = ob_rr_theme->osd_hilite_label->texture[0];
  86     prompt_a_press->texture[0] = ob_rr_theme->osd_hilite_label->texture[0];
  87     prompt_a_pfocus->texture[0] = ob_rr_theme->osd_hilite_label->texture[0];
  88
  89     prompt_a_button->texture[0].data.text.justify = RR_JUSTIFY_CENTER;
  90     prompt_a_focus->texture[0].data.text.justify = RR_JUSTIFY_CENTER;
  91     prompt_a_press->texture[0].data.text.justify = RR_JUSTIFY_CENTER;
  92     prompt_a_pfocus->texture[0].data.text.justify = RR_JUSTIFY_CENTER;
  93
  94     prompt_a_button->texture[0].data.text.color = c_button;
  95     prompt_a_focus->texture[0].data.text.color = c_focus;
  96     prompt_a_press->texture[0].data.text.color = c_press;
  97     prompt_a_pfocus->texture[0].data.text.color = c_press;
  98
  99     prompt_a_focus->texture[1].data.lineart.color = c_focus;
 100     prompt_a_focus->texture[2].data.lineart.color = c_focus;
 101     prompt_a_focus->texture[3].data.lineart.color = c_focus;
 102     prompt_a_focus->texture[4].data.lineart.color = c_focus;
 103
 104     prompt_a_pfocus->texture[1].data.lineart.color = c_press;
 105     prompt_a_pfocus->texture[2].data.lineart.color = c_press;
 106     prompt_a_pfocus->texture[3].data.lineart.color = c_press;
 107     prompt_a_pfocus->texture[4].data.lineart.color = c_press;
 108
 109     prompt_a_msg = RrAppearanceCopy(ob_rr_theme->osd_hilite_label);
 110     prompt_a_msg->texture[0].data.text.flow = TRUE;
 111
 112     if (reconfig) {
 113         GList *it;
 114         for (it = prompt_list; it; it = g_list_next(it)) {
 115             ObPrompt *p = it->data;
 116             prompt_layout(p);
 117             render_all(p);
 118         }
 119     }
 120 }
 121
 122 void prompt_shutdown(gboolean reconfig)
 123 {
 124     RrAppearanceFree(prompt_a_button);
 125     RrAppearanceFree(prompt_a_focus);
 126     RrAppearanceFree(prompt_a_press);
 127     RrAppearanceFree(prompt_a_pfocus);
 128     RrAppearanceFree(prompt_a_msg);
 129 }
 130
 131 ObPrompt* prompt_new(const gchar *msg,
 132                      const ObPromptAnswer *answers, gint n_answers,
 133                      gint default_result, gint cancel_result,
 134                      ObPromptCallback func, gpointer data)
 135 {
 136     ObPrompt *self;
 137     XSetWindowAttributes attrib;
 138     gint i;
 139
 140     attrib.override_redirect = FALSE;
 141
 142     self = g_new0(ObPrompt, 1);
 143     self->ref = 1;
 144     self->func = func;
 145     self->data = data;
 146     self->default_result = default_result;
 147     self->cancel_result = cancel_result;
 148     self->super.type = OB_WINDOW_CLASS_PROMPT;
 149     self->super.window = XCreateWindow(obt_display, obt_root(ob_screen),
 150                                        0, 0, 1, 1, 0,
 151                                        CopyFromParent, InputOutput,
 152                                        CopyFromParent,
 153                                        CWOverrideRedirect,
 154                                        &attrib);
 155
 156     /* make it a dialog type window */
 157     OBT_PROP_SET32(self->super.window, NET_WM_WINDOW_TYPE, ATOM,
 158                    OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DIALOG));
 159
 160     /* listen for key presses on the window */
 161     self->event_mask = KeyPressMask;
 162
 163     /* set up the text message widow */
 164     self->msg.text = g_strdup(msg);
 165     self->msg.window = XCreateWindow(obt_display, self->super.window,
 166                                      0, 0, 1, 1, 0,
 167                                      CopyFromParent, InputOutput,
 168                                      CopyFromParent, 0, NULL);
 169     XMapWindow(obt_display, self->msg.window);
 170
 171     /* set up the buttons from the answers */
 172
 173     self->n_buttons = n_answers;
 174     if (!self->n_buttons)
 175         self->n_buttons = 1;
 176
 177     self->button = g_new0(ObPromptElement, self->n_buttons);
 178
 179     if (n_answers == 0) {
 180         g_assert(self->n_buttons == 1); /* should be set to this above.. */
 181         self->button[0].text = g_strdup(_("OK"));
 182     }
 183     else {
 184         g_assert(self->n_buttons > 0);
 185         for (i = 0; i < self->n_buttons; ++i) {
 186             self->button[i].text = g_strdup(answers[i].text);
 187             self->button[i].result = answers[i].result;
 188         }
 189     }
 190
 191     for (i = 0; i < self->n_buttons; ++i) {
 192         self->button[i].window = XCreateWindow(obt_display, self->super.window,
 193                                                0, 0, 1, 1, 0,
 194                                                CopyFromParent, InputOutput,
 195                                                CopyFromParent, 0, NULL);
 196         XMapWindow(obt_display, self->button[i].window);
 197         window_add(&self->button[i].window, PROMPT_AS_WINDOW(self));
 198
 199         /* listen for button presses on the buttons */
 200         XSelectInput(obt_display, self->button[i].window,
 201                      ButtonPressMask | ButtonReleaseMask | ButtonMotionMask);
 202     }
 203
 204     prompt_list = g_list_prepend(prompt_list, self);
 205
 206     return self;
 207 }
 208
 209 void prompt_ref(ObPrompt *self)
 210 {
 211     ++self->ref;
 212 }
 213
 214 void prompt_unref(ObPrompt *self)
 215 {
 216     if (self && --self->ref == 0) {
 217         gint i;
 218
 219         prompt_list = g_list_remove(prompt_list, self);
 220
 221         for (i = 0; i < self->n_buttons; ++i) {
 222             window_remove(self->button[i].window);
 223             XDestroyWindow(obt_display, self->button[i].window);
 224         }
 225
 226         XDestroyWindow(obt_display, self->msg.window);
 227         XDestroyWindow(obt_display, self->super.window);
 228         g_free(self);
 229     }
 230 }
 231
 232 static void prompt_layout(ObPrompt *self)
 233 {
 234     gint l, r, t, b;
 235     gint i;
 236     gint allbuttonsw, allbuttonsh, buttonx;
 237     gint w, h;
 238     gint maxw;
 239
 240     RrMargins(prompt_a_bg, &l, &t, &r, &b);
 241     l += OUTSIDE_MARGIN;
 242     t += OUTSIDE_MARGIN;
 243     r += OUTSIDE_MARGIN;
 244     b += OUTSIDE_MARGIN;
 245
 246     {
 247         Rect *area = screen_physical_area_all_monitors();
 248         maxw = MIN(MAX_WIDTH, area->width*4/5);
 249         g_free(area);
 250     }
 251
 252     /* find the button sizes and how much space we need for them */
 253     allbuttonsw = allbuttonsh = 0;
 254     for (i = 0; i < self->n_buttons; ++i) {
 255         gint bw, bh;
 256
 257         prompt_a_button->texture[0].data.text.string = self->button[i].text;
 258         prompt_a_focus->texture[0].data.text.string = self->button[i].text;
 259         prompt_a_press->texture[0].data.text.string = self->button[i].text;
 260         prompt_a_pfocus->texture[0].data.text.string = self->button[i].text;
 261         RrMinSize(prompt_a_button, &bw, &bh);
 262         self->button[i].width = bw;
 263         self->button[i].height = bh;
 264         RrMinSize(prompt_a_focus, &bw, &bh);
 265         self->button[i].width = MAX(self->button[i].width, bw);
 266         self->button[i].height = MAX(self->button[i].height, bh);
 267         RrMinSize(prompt_a_press, &bw, &bh);
 268         self->button[i].width = MAX(self->button[i].width, bw);
 269         self->button[i].height = MAX(self->button[i].height, bh);
 270         RrMinSize(prompt_a_pfocus, &bw, &bh);
 271         self->button[i].width = MAX(self->button[i].width, bw);
 272         self->button[i].height = MAX(self->button[i].height, bh);
 273
 274
 275         self->button[i].width += BUTTON_HMARGIN * 2;
 276         self->button[i].height += BUTTON_VMARGIN * 2;
 277
 278         allbuttonsw += self->button[i].width + (i > 0 ? BUTTON_SEPARATION : 0);
 279         allbuttonsh = MAX(allbuttonsh, self->button[i].height);
 280     }
 281
 282     self->msg_wbound = MAX(allbuttonsw, maxw);
 283
 284     /* measure the text message area */
 285     prompt_a_msg->texture[0].data.text.string = self->msg.text;
 286     prompt_a_msg->texture[0].data.text.maxwidth = self->msg_wbound;
 287     RrMinSize(prompt_a_msg, &self->msg.width, &self->msg.height);
 288
 289     /* width and height inside the outer margins */
 290     w = MAX(self->msg.width, allbuttonsw);
 291     h = self->msg.height + MSG_BUTTON_SEPARATION + allbuttonsh;
 292
 293     /* position the text message */
 294     self->msg.x = l + (w - self->msg.width) / 2;
 295     self->msg.y = t;
 296
 297     /* position the button buttons on the right of the dialog */
 298     buttonx = l + w;
 299     for (i = self->n_buttons - 1; i >= 0; --i) {
 300         self->button[i].x = buttonx - self->button[i].width;
 301         buttonx -= self->button[i].width + BUTTON_SEPARATION;
 302         self->button[i].y = t + h - allbuttonsh;
 303         self->button[i].y += (allbuttonsh - self->button[i].height) / 2;
 304     }
 305
 306     /* size and position the toplevel window */
 307     prompt_resize(self, w + l + r, h + t + b);
 308
 309     /* move and resize the internal windows */
 310     XMoveResizeWindow(obt_display, self->msg.window,
 311                       self->msg.x, self->msg.y,
 312                       self->msg.width, self->msg.height);
 313     for (i = 0; i < self->n_buttons; ++i)
 314         XMoveResizeWindow(obt_display, self->button[i].window,
 315                           self->button[i].x, self->button[i].y,
 316                           self->button[i].width, self->button[i].height);
 317 }
 318
 319 static void prompt_resize(ObPrompt *self, gint w, gint h)
 320 {
 321     XConfigureRequestEvent req;
 322     XSizeHints hints;
 323
 324     self->width = w;
 325     self->height = h;
 326
 327     /* the user can't resize the prompt */
 328     hints.flags = PMinSize | PMaxSize;
 329     hints.min_width = hints.max_width = w;
 330     hints.min_height = hints.max_height = h;
 331     XSetWMNormalHints(obt_display, self->super.window, &hints);
 332
 333     if (self->mapped) {
 334         /* send a configure request like a normal client would */
 335         req.type = ConfigureRequest;
 336         req.display = obt_display;
 337         req.parent = obt_root(ob_screen);
 338         req.window = self->super.window;
 339         req.width = w;
 340         req.height = h;
 341         req.value_mask = CWWidth | CWHeight;
 342         XSendEvent(req.display, req.window, FALSE, StructureNotifyMask,
 343                    (XEvent*)&req);
 344     }
 345     else
 346         XResizeWindow(obt_display, self->super.window, w, h);
 347 }
 348
 349 static void setup_button_focus_tex(ObPromptElement *e, RrAppearance *a,
 350                                    gboolean on)
 351 {
 352     gint i, l, r, t, b;
 353
 354     for (i = 1; i < 5; ++i)
 355         a->texture[i].type = on ? RR_TEXTURE_LINE_ART : RR_TEXTURE_NONE;
 356
 357     if (!on) return;
 358
 359     RrMargins(a, &l, &t, &r, &b);
 360     l += MIN(BUTTON_HMARGIN, BUTTON_VMARGIN) / 2;
 361     r += MIN(BUTTON_HMARGIN, BUTTON_VMARGIN) / 2;
 362     t += MIN(BUTTON_HMARGIN, BUTTON_VMARGIN) / 2;
 363     b += MIN(BUTTON_HMARGIN, BUTTON_VMARGIN) / 2;
 364
 365     /* top line */
 366     a->texture[1].data.lineart.x1 = l;
 367     a->texture[1].data.lineart.x2 = e->width - r - 1;
 368     a->texture[1].data.lineart.y1 = t;
 369     a->texture[1].data.lineart.y2 = t;
 370
 371     /* bottom line */
 372     a->texture[2].data.lineart.x1 = l;
 373     a->texture[2].data.lineart.x2 = e->width - r - 1;
 374     a->texture[2].data.lineart.y1 = e->height - b - 1;
 375     a->texture[2].data.lineart.y2 = e->height - b - 1;
 376
 377     /* left line */
 378     a->texture[3].data.lineart.x1 = l;
 379     a->texture[3].data.lineart.x2 = l;
 380     a->texture[3].data.lineart.y1 = t;
 381     a->texture[3].data.lineart.y2 = e->height - b - 1;
 382
 383     /* right line */
 384     a->texture[4].data.lineart.x1 = e->width - r - 1;
 385     a->texture[4].data.lineart.x2 = e->width - r - 1;
 386     a->texture[4].data.lineart.y1 = t;
 387     a->texture[4].data.lineart.y2 = e->height - b - 1;
 388 }
 389
 390 static void render_button(ObPrompt *self, ObPromptElement *e)
 391 {
 392     RrAppearance *a;
 393
 394     if (e->pressed && self->focus == e) a = prompt_a_pfocus;
 395     else if (self->focus == e)          a = prompt_a_focus;
 396     else if (e->pressed)                a = prompt_a_press;
 397     else                                a = prompt_a_button;
 398
 399     a->surface.parent = prompt_a_bg;
 400     a->surface.parentx = e->x;
 401     a->surface.parenty = e->y;
 402
 403     /* draw the keyfocus line */
 404     if (a == prompt_a_pfocus || a == prompt_a_focus)
 405         setup_button_focus_tex(e, a, TRUE);
 406
 407     a->texture[0].data.text.string = e->text;
 408     RrPaint(a, e->window, e->width, e->height);
 409
 410     /* turn off the keyfocus line so that it doesn't affect size calculations
 411      */
 412     if (a == prompt_a_pfocus || a == prompt_a_focus)
 413         setup_button_focus_tex(e, a, FALSE);
 414 }
 415
 416 static void render_all(ObPrompt *self)
 417 {
 418     gint i;
 419
 420     RrPaint(prompt_a_bg, self->super.window, self->width, self->height);
 421
 422     prompt_a_msg->surface.parent = prompt_a_bg;
 423     prompt_a_msg->surface.parentx = self->msg.x;
 424     prompt_a_msg->surface.parenty = self->msg.y;
 425
 426     prompt_a_msg->texture[0].data.text.string = self->msg.text;
 427     prompt_a_msg->texture[0].data.text.maxwidth = self->msg_wbound;
 428     RrPaint(prompt_a_msg, self->msg.window, self->msg.width, self->msg.height);
 429
 430     for (i = 0; i < self->n_buttons; ++i)
 431         render_button(self, &self->button[i]);
 432 }
 433
 434 void prompt_show(ObPrompt *self, ObClient *parent, gboolean modal)
 435 {
 436     gint i;
 437
 438     if (self->mapped) {
 439         /* activate the prompt */
 440         OBT_PROP_MSG(ob_screen, self->super.window, NET_ACTIVE_WINDOW,
 441                      1, /* from an application.. */
 442                      event_curtime,
 443                      0,
 444                      0, 0);
 445         return;
 446     }
 447
 448     /* set the focused button (if not found then the first button is used) */
 449     self->focus = &self->button[0];
 450     for (i = 0; i < self->n_buttons; ++i)
 451         if (self->button[i].result == self->default_result) {
 452             self->focus = &self->button[i];
 453             break;
 454         }
 455
 456     if (parent) {
 457         Atom states[1];
 458         gint nstates;
 459         Window p;
 460         XWMHints h;
 461
 462         if (parent->group) {
 463             /* make it transient for the window's group */
 464             h.flags = WindowGroupHint;
 465             h.window_group = parent->group->leader;
 466             p = obt_root(ob_screen);
 467         }
 468         else {
 469             /* make it transient for the window directly */
 470             h.flags = 0;
 471             p = parent->window;
 472         }
 473
 474         XSetWMHints(obt_display, self->super.window, &h);
 475         OBT_PROP_SET32(self->super.window, WM_TRANSIENT_FOR, WINDOW, p);
 476
 477         states[0] = OBT_PROP_ATOM(NET_WM_STATE_MODAL);
 478         nstates = (modal ? 1 : 0);
 479         OBT_PROP_SETA32(self->super.window, NET_WM_STATE, ATOM,
 480                         states, nstates);
 481     }
 482     else
 483         OBT_PROP_ERASE(self->super.window, WM_TRANSIENT_FOR);
 484
 485     /* set up the dialog and render it */
 486     prompt_layout(self);
 487     render_all(self);
 488
 489     client_manage(self->super.window, self);
 490
 491     self->mapped = TRUE;
 492 }
 493
 494 void prompt_hide(ObPrompt *self)
 495 {
 496     XUnmapWindow(obt_display, self->super.window);
 497     self->mapped = FALSE;
 498 }
 499
 500 gboolean prompt_key_event(ObPrompt *self, XEvent *e)
 501 {
 502     gboolean shift;
 503     guint shift_mask;
 504
 505     if (e->type != KeyPress) return FALSE;
 506
 507     shift_mask = obt_keyboard_modkey_to_modmask(OBT_KEYBOARD_MODKEY_SHIFT);
 508     shift = !!(e->xkey.state & shift_mask);
 509
 510     /* only accept shift */
 511     if (e->xkey.state != 0 && e->xkey.state != shift_mask)
 512         return FALSE;
 513
 514     if (e->xkey.keycode == ob_keycode(OB_KEY_ESCAPE))
 515         prompt_cancel(self);
 516     else if (e->xkey.keycode == ob_keycode(OB_KEY_RETURN) ||
 517              e->xkey.keycode == ob_keycode(OB_KEY_SPACE))
 518     {
 519         if (self->func) self->func(self, self->focus->result, self->data);
 520         prompt_hide(self);
 521     }
 522     else if (e->xkey.keycode == ob_keycode(OB_KEY_TAB) ||
 523              e->xkey.keycode == ob_keycode(OB_KEY_LEFT) ||
 524              e->xkey.keycode == ob_keycode(OB_KEY_RIGHT))
 525     {
 526         gint i;
 527         gboolean left;
 528         ObPromptElement *oldfocus;
 529
 530         left = e->xkey.keycode == ob_keycode(OB_KEY_LEFT) ||
 531             (e->xkey.keycode == ob_keycode(OB_KEY_TAB) && shift);
 532         oldfocus = self->focus;
 533
 534         for (i = 0; i < self->n_buttons; ++i)
 535             if (self->focus == &self->button[i]) break;
 536         i += (left ? -1 : 1);
 537         if (i < 0) i = self->n_buttons - 1;
 538         else if (i >= self->n_buttons) i = 0;
 539         self->focus = &self->button[i];
 540
 541         if (oldfocus != self->focus) render_button(self, oldfocus);
 542         render_button(self, self->focus);
 543     }
 544     return TRUE;
 545 }
 546
 547 gboolean prompt_mouse_event(ObPrompt *self, XEvent *e)
 548 {
 549     gint i;
 550     ObPromptElement *but;
 551
 552     if (e->type != ButtonPress && e->type != ButtonRelease &&
 553         e->type != MotionNotify) return FALSE;
 554
 555     /* find the button */
 556     but = NULL;
 557     for (i = 0; i < self->n_buttons; ++i)
 558         if (self->button[i].window ==
 559             (e->type == MotionNotify ? e->xmotion.window : e->xbutton.window))
 560         {
 561             but = &self->button[i];
 562             break;
 563         }
 564     if (!but) return FALSE;
 565
 566     if (e->type == ButtonPress) {
 567         ObPromptElement *oldfocus;
 568
 569         oldfocus = self->focus;
 570
 571         but->pressed = TRUE;
 572         self->focus = but;
 573
 574         if (oldfocus != but) render_button(self, oldfocus);
 575         render_button(self, but);
 576     }
 577     else if (e->type == ButtonRelease) {
 578         if (but->pressed) {
 579             if (self->func) self->func(self, but->result, self->data);
 580             prompt_hide(self);
 581         }
 582     }
 583     else if (e->type == MotionNotify) {
 584         gboolean press;
 585
 586         press = (e->xmotion.x >= 0 && e->xmotion.y >= 0 &&
 587                  e->xmotion.x < but->width && e->xmotion.y < but->height);
 588
 589         if (press != but->pressed) {
 590             but->pressed = press;
 591             render_button(self, but);
 592         }
 593     }
 594     return TRUE;
 595 }
 596
 597 void prompt_cancel(ObPrompt *self)
 598 {
 599     if (self->func) self->func(self, self->cancel_result, self->data);
 600     prompt_hide(self);
 601 }