WINGs/wview.c

   1
   2
   3 #include "WINGsP.h"
   4
   5 #include <X11/Xresource.h>
   6
   7
   8
   9 /* the notifications about views */
  10
  11 char *WMViewSizeDidChangeNotification = "WMViewSizeDidChangeNotification";
  12 char *WMViewFocusDidChangeNotification = "WMViewFocusDidChangeNotification";
  13 char *WMViewRealizedNotification = "WMViewRealizedNotification";
  14
  15
  16 #define EVENT_MASK  \
  17         KeyPressMask|KeyReleaseMask|ButtonPressMask|ButtonReleaseMask| \
  18         EnterWindowMask|LeaveWindowMask|PointerMotionMask|ExposureMask| \
  19         VisibilityChangeMask|FocusChangeMask|PropertyChangeMask|\
  20         SubstructureNotifyMask|SubstructureRedirectMask
  21
  22
  23 static XSetWindowAttributes defAtts= {
  24     None,                       /* background_pixmap */
  25     0,                          /* background_pixel */
  26     CopyFromParent,             /* border_pixmap */
  27     0,                          /* border_pixel */
  28     ForgetGravity,              /* bit_gravity */
  29     ForgetGravity,              /* win_gravity */
  30     NotUseful,                  /* backing_store */
  31     (unsigned) ~0,              /* backing_planes */
  32     0,                          /* backing_pixel */
  33     False,                      /* save_under */
  34     EVENT_MASK,                 /* event_mask */
  35     0,                          /* do_not_propagate_mask */
  36     False,                      /* override_redirect */
  37     None,                       /* colormap */
  38     None                        /* cursor */
  39 };
  40
  41
  42
  43 static XContext ViewContext=0;         /* context for views */
  44
  45
  46
  47
  48 W_View*
  49 W_GetViewForXWindow(Display *display, Window window)
  50 {
  51     W_View *view;
  52
  53     if (XFindContext(display, window, ViewContext, (XPointer*)&view)==0) {
  54         return view;
  55     }
  56     return NULL;
  57 }
  58
  59
  60
  61 static void
  62 unparentView(W_View *view)
  63 {
  64     /* remove from parent's children list */
  65     if (view->parent!=NULL) {
  66         W_View *ptr;
  67
  68         ptr = view->parent->childrenList;
  69         if (ptr == view) {
  70             view->parent->childrenList = view->nextSister;
  71         } else {
  72             while (ptr!=NULL) {
  73                 if (ptr->nextSister == view) {
  74                     ptr->nextSister = view->nextSister;
  75                     break;
  76                 }
  77                 ptr = ptr->nextSister;
  78             }
  79         }
  80     }
  81     view->parent = NULL;
  82 }
  83
  84
  85 static void
  86 adoptChildView(W_View *view, W_View *child)
  87 {
  88     child->nextSister = NULL;
  89
  90     /* add to end of children list of parent */
  91     if (view->childrenList == NULL) {
  92         view->childrenList = child;
  93     } else {
  94         W_View *ptr;
  95
  96         ptr = view->childrenList;
  97         while (ptr->nextSister!=NULL)
  98             ptr = ptr->nextSister;
  99         ptr->nextSister = child;
 100     }
 101     child->parent = view;
 102 }
 103
 104
 105 static W_View*
 106 createView(W_Screen *screen, W_View *parent)
 107 {
 108     W_View *view;
 109
 110     if (ViewContext==0)
 111         ViewContext = XUniqueContext();
 112
 113     view = wmalloc(sizeof(W_View));
 114     memset(view, 0, sizeof(W_View));
 115
 116     view->refCount = 1;
 117
 118     view->screen = screen;
 119
 120     if (parent!=NULL) {
 121         /* attributes are not valid for root window */
 122         view->attribFlags = CWEventMask|CWBitGravity;
 123         view->attribs = defAtts;
 124
 125         view->attribFlags |= CWBackPixel|CWColormap|CWBorderPixel;
 126         view->attribs.background_pixel = W_PIXEL(screen->gray);
 127         view->attribs.border_pixel = W_PIXEL(screen->black);
 128         view->attribs.colormap = screen->colormap;
 129
 130         adoptChildView(parent, view);
 131     }
 132
 133     return view;
 134 }
 135
 136
 137
 138 W_View*
 139 W_CreateView(W_View *parent)
 140 {
 141     return createView(parent->screen, parent);
 142 }
 143
 144
 145 W_View*
 146 W_CreateRootView(W_Screen *screen)
 147 {
 148     W_View *view;
 149
 150     view = createView(screen, NULL);
 151
 152     view->window = screen->rootWin;
 153
 154     view->flags.realized = 1;
 155     view->flags.mapped = 1;
 156     view->flags.root = 1;
 157
 158     view->size.width =
 159         WidthOfScreen(ScreenOfDisplay(screen->display, screen->screen));
 160     view->size.height =
 161         HeightOfScreen(ScreenOfDisplay(screen->display, screen->screen));
 162
 163     return view;
 164 }
 165
 166
 167 W_View*
 168 W_CreateTopView(W_Screen *screen)
 169 {
 170     W_View *view;
 171
 172     view = createView(screen, screen->rootView);
 173     if (!view)
 174         return NULL;
 175
 176     view->flags.topLevel = 1;
 177     view->attribs.event_mask |= StructureNotifyMask;
 178
 179     return view;
 180 }
 181
 182
 183
 184 void
 185 W_RealizeView(W_View *view)
 186 {
 187     Window parentWID;
 188     Display *dpy = view->screen->display;
 189     W_View *ptr;
 190
 191     assert(view->size.width > 0);
 192     assert(view->size.height > 0);
 193
 194
 195     if (view->parent && !view->parent->flags.realized) {
 196         wwarning("trying to realize widget of unrealized parent");
 197         return;
 198     }
 199
 200     if (!view->flags.realized) {
 201         parentWID = view->parent->window;
 202         view->window = XCreateWindow(dpy, parentWID, view->pos.x, view->pos.y,
 203                                      view->size.width, view->size.height, 0,
 204                                      view->screen->depth, InputOutput,
 205                                      view->screen->visual, view->attribFlags,
 206                                      &view->attribs);
 207
 208         XSaveContext(dpy, view->window, ViewContext, (XPointer)view);
 209
 210         view->flags.realized = 1;
 211
 212         if (view->flags.mapWhenRealized) {
 213             W_MapView(view);
 214             view->flags.mapWhenRealized = 0;
 215         }
 216
 217         WMPostNotificationName(WMViewRealizedNotification, view, NULL);
 218     }
 219
 220     /* realize children */
 221     ptr = view->childrenList;
 222     while (ptr!=NULL) {
 223         W_RealizeView(ptr);
 224
 225         ptr = ptr->nextSister;
 226     }
 227 }
 228
 229
 230
 231 Bool
 232 W_CheckInternalMessage(W_Screen *scr, XClientMessageEvent *cev, int event)
 233 {
 234     if (cev->message_type == scr->internalMessage
 235         && cev->format == 32 && cev->data.l[1] == event)
 236         return True;
 237     else
 238         return False;
 239 }
 240
 241
 242 void
 243 W_ReparentView(W_View *view, W_View *newParent, int x, int y)
 244 {
 245     Display *dpy = view->screen->display;
 246
 247     assert(!view->flags.topLevel);
 248
 249     unparentView(view);
 250     adoptChildView(newParent, view);
 251
 252     if (view->flags.realized) {
 253         if (newParent->flags.realized) {
 254             XReparentWindow(dpy, view->window, newParent->window, x, y);
 255         } else {
 256             wwarning("trying to reparent realized view to unrealized parent");
 257             return;
 258         }
 259     }
 260
 261     view->pos.x = x;
 262     view->pos.y = y;
 263 }
 264
 265
 266
 267 void
 268 W_MapView(W_View *view)
 269 {
 270     if (!view->flags.mapped) {
 271         if (view->flags.realized) {
 272             XMapRaised(view->screen->display, view->window);
 273             XFlush(view->screen->display);
 274             view->flags.mapped = 1;
 275         } else {
 276             view->flags.mapWhenRealized = 1;
 277         }
 278     }
 279 }
 280
 281
 282 /*
 283  * W_MapSubviews-
 284  *     maps all children of the current view that where already realized.
 285  */
 286 void
 287 W_MapSubviews(W_View *view)
 288 {
 289     XMapSubwindows(view->screen->display, view->window);
 290     XFlush(view->screen->display);
 291
 292     view = view->childrenList;
 293     while (view) {
 294         view->flags.mapped = 1;
 295         view->flags.mapWhenRealized = 0;
 296         view = view->nextSister;
 297     }
 298 }
 299
 300
 301
 302 void
 303 W_UnmapSubviews(W_View *view)
 304 {
 305     XUnmapSubwindows(view->screen->display, view->window);
 306     XFlush(view->screen->display);
 307
 308     view = view->childrenList;
 309     while (view) {
 310         view->flags.mapped = 0;
 311         view->flags.mapWhenRealized = 0;
 312         view = view->nextSister;
 313     }
 314 }
 315
 316
 317
 318 void
 319 W_UnmapView(W_View *view)
 320 {
 321     view->flags.mapWhenRealized = 0;
 322     if (!view->flags.mapped)
 323         return;
 324
 325     XUnmapWindow(view->screen->display, view->window);
 326     XFlush(view->screen->display);
 327
 328     view->flags.mapped = 0;
 329 }
 330
 331
 332 W_View*
 333 W_TopLevelOfView(W_View *view)
 334 {
 335     W_View *toplevel;
 336
 337     for (toplevel=view; !toplevel->flags.topLevel; toplevel=toplevel->parent);
 338
 339     return toplevel;
 340 }
 341
 342
 343 static void
 344 destroyView(W_View *view)
 345 {
 346     W_View *ptr;
 347
 348     if (view->flags.alreadyDead)
 349         return;
 350     view->flags.alreadyDead = 1;
 351
 352     if (view->nextFocusChain)
 353         view->nextFocusChain->prevFocusChain = view->prevFocusChain;
 354     if (view->prevFocusChain)
 355         view->prevFocusChain->nextFocusChain = view->nextFocusChain;
 356
 357     /* Do not leave focus in a inexisting control */
 358     if (W_FocusedViewOfToplevel(W_TopLevelOfView(view))==view)
 359         W_SetFocusOfTopLevel(W_TopLevelOfView(view), NULL);
 360
 361     if (view->flags.topLevel) {
 362         W_FocusInfo *info = view->screen->focusInfo;
 363         /* remove focus information associated to this toplevel */
 364
 365         if (info) {
 366             if (info->toplevel==view) {
 367                 view->screen->focusInfo = info->next;
 368                 free(info);
 369             } else {
 370                 while (info->next) {
 371                     if (info->next->toplevel == view)
 372                         break;
 373                     info = info->next;
 374                 }
 375                 if (info->next) {
 376                     W_FocusInfo *next = info->next->next;
 377                     free(info->next);
 378                     info->next = next;
 379                 }
 380                 /* else the toplevel did not have any focused subview */
 381             }
 382         }
 383     }
 384
 385     /* destroy children recursively */
 386     while (view->childrenList!=NULL) {
 387         ptr = view->childrenList;
 388         ptr->flags.parentDying = 1;
 389
 390         W_DestroyView(ptr);
 391
 392         if (ptr == view->childrenList) {
 393             view->childrenList = ptr->nextSister;
 394             ptr->parent = NULL;
 395         }
 396     }
 397
 398     W_CallDestroyHandlers(view);
 399
 400     if (view->flags.realized) {
 401         XDeleteContext(view->screen->display, view->window, ViewContext);
 402
 403         /* if parent is being destroyed, it will die naturaly */
 404         if (!view->flags.parentDying || view->flags.topLevel)
 405             XDestroyWindow(view->screen->display, view->window);
 406     }
 407
 408     /* remove self from parent's children list */
 409     unparentView(view);
 410
 411     W_CleanUpEvents(view);
 412 #if 0
 413     if (view->dragSourceProcs)
 414         free(view->dragSourceProcs);
 415
 416     if (view->dragDestinationProcs)
 417         free(view->dragDestinationProcs);
 418 #endif
 419     free(view);
 420 }
 421
 422
 423
 424 void
 425 W_DestroyView(W_View *view)
 426 {
 427     W_ReleaseView(view);
 428 }
 429
 430
 431
 432 void
 433 W_MoveView(W_View *view, int x, int y)
 434 {
 435     assert(view->flags.root==0);
 436
 437     if (view->pos.x == x && view->pos.y == y)
 438         return;
 439
 440     if (view->flags.realized) {
 441         XMoveWindow(view->screen->display, view->window, x, y);
 442     }
 443     view->pos.x = x;
 444     view->pos.y = y;
 445 }
 446
 447
 448 void
 449 W_ResizeView(W_View *view, unsigned int width, unsigned int height)
 450 {
 451     int shrinked;
 452
 453     assert(width > 0);
 454     assert(height > 0);
 455
 456     if (view->size.width == width && view->size.height == height)
 457         return;
 458
 459     shrinked = width < view->size.width || height < view->size.height;
 460
 461     if (view->flags.realized) {
 462         XResizeWindow(view->screen->display, view->window, width, height);
 463     }
 464     view->size.width = width;
 465     view->size.height = height;
 466
 467     if (view->flags.notifySizeChanged)
 468         WMPostNotificationName(WMViewSizeDidChangeNotification, view, NULL);
 469 }
 470
 471
 472 void
 473 W_RedisplayView(W_View *view)
 474 {
 475     XEvent ev;
 476
 477     if (!view->flags.mapped)
 478         return;
 479
 480     ev.xexpose.type = Expose;
 481     ev.xexpose.display = view->screen->display;
 482     ev.xexpose.window = view->window;
 483     ev.xexpose.count = 0;
 484
 485     WMHandleEvent(&ev);
 486 }
 487
 488
 489 void
 490 W_SetViewBackgroundColor(W_View *view, WMColor *color)
 491 {
 492     view->attribFlags |= CWBackPixel;
 493     view->attribs.background_pixel = color->color.pixel;
 494     if (view->flags.realized) {
 495         XSetWindowBackground(view->screen->display, view->window,
 496                              color->color.pixel);
 497         XClearWindow(view->screen->display, view->window);
 498     }
 499 }
 500
 501
 502
 503 W_View*
 504 W_FocusedViewOfToplevel(W_View *view)
 505 {
 506     WMScreen *scr = view->screen;
 507     W_FocusInfo *info;
 508
 509     for (info = scr->focusInfo; info!=NULL; info = info->next)
 510         if (view == info->toplevel)
 511             break;
 512
 513     if (!info)
 514         return NULL;
 515
 516     return info->focused;
 517 }
 518
 519
 520 void
 521 W_SetFocusOfTopLevel(W_View *toplevel, W_View *view)
 522 {
 523     WMScreen *scr = toplevel->screen;
 524     XEvent event;
 525     W_FocusInfo *info;
 526
 527     for (info = scr->focusInfo; info!=NULL; info = info->next)
 528         if (toplevel == info->toplevel)
 529             break;
 530
 531     if (!info) {
 532         info = wmalloc(sizeof(W_FocusInfo));
 533         info->toplevel = toplevel;
 534         info->focused = view;
 535         info->next = scr->focusInfo;
 536         scr->focusInfo = info;
 537     } else {
 538         event.xfocus.mode = NotifyNormal;
 539         event.xfocus.detail = NotifyDetailNone;
 540         if (info->focused) {
 541             /* simulate FocusOut event */
 542             event.xfocus.type = FocusOut;
 543             W_DispatchMessage(info->focused, &event);
 544         }
 545         info->focused = view;
 546     }
 547     if (view) {
 548         /* simulate FocusIn event */
 549         event.xfocus.type = FocusIn;
 550         W_DispatchMessage(view, &event);
 551     }
 552 }
 553
 554
 555 void
 556 W_BroadcastMessage(W_View *targetParent, XEvent *event)
 557 {
 558     W_View *target;
 559
 560     target = targetParent->childrenList;
 561     while (target!=NULL) {
 562         W_DispatchMessage(target, event);
 563
 564         target = target->nextSister;
 565     }
 566 }
 567
 568
 569 void
 570 W_DispatchMessage(W_View *target, XEvent *event)
 571 {
 572     if (target->window==None)
 573         return;
 574     event->xclient.window = target->window;
 575     event->xclient.display = target->screen->display;
 576
 577     WMHandleEvent(event);
 578     /*
 579     XSendEvent(target->screen->display, target->window, False,
 580                SubstructureNotifyMask, event);
 581      */
 582 }
 583
 584
 585
 586 WMView*
 587 W_RetainView(WMView *view)
 588 {
 589     view->refCount++;
 590     return view;
 591 }
 592
 593
 594
 595 void
 596 W_ReleaseView(WMView *view)
 597 {
 598     view->refCount--;
 599     if (view->refCount < 1) {
 600         destroyView(view);
 601     }
 602 }
 603
 604
 605 WMWidget*
 606 WMWidgetOfView(WMView *view)
 607 {
 608     return view->self;
 609 }
 610
 611
 612 WMSize
 613 WMGetViewSize(WMView *view)
 614 {
 615     return view->size;
 616 }
 617
 618 WMPoint
 619 WMGetViewPosition(WMView *view)
 620 {
 621     return view->pos;
 622 }
 623
 624
 625 void
 626 WMSetViewNotifySizeChanges(WMView *view, Bool flag)
 627 {
 628     view->flags.notifySizeChanged = flag;
 629 }
 630
 631 Window
 632 WMViewXID(WMView *view)
 633 {
 634     return view->window;
 635 }
 636