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         view->backColor = WMRetainColor(screen->gray);
 131
 132         adoptChildView(parent, view);
 133     }
 134
 135     return view;
 136 }
 137
 138
 139
 140 W_View*
 141 W_CreateView(W_View *parent)
 142 {
 143     return createView(parent->screen, parent);
 144 }
 145
 146
 147 W_View*
 148 W_CreateRootView(W_Screen *screen)
 149 {
 150     W_View *view;
 151
 152     view = createView(screen, NULL);
 153
 154     view->window = screen->rootWin;
 155
 156     view->flags.realized = 1;
 157     view->flags.mapped = 1;
 158     view->flags.root = 1;
 159
 160     view->size.width =
 161         WidthOfScreen(ScreenOfDisplay(screen->display, screen->screen));
 162     view->size.height =
 163         HeightOfScreen(ScreenOfDisplay(screen->display, screen->screen));
 164
 165     return view;
 166 }
 167
 168
 169 W_View*
 170 W_CreateTopView(W_Screen *screen)
 171 {
 172     W_View *view;
 173
 174     view = createView(screen, screen->rootView);
 175     if (!view)
 176         return NULL;
 177
 178     view->flags.topLevel = 1;
 179     view->attribs.event_mask |= StructureNotifyMask;
 180
 181     return view;
 182 }
 183
 184
 185
 186 void
 187 W_RealizeView(W_View *view)
 188 {
 189     Window parentWID;
 190     Display *dpy = view->screen->display;
 191     W_View *ptr;
 192
 193     assert(view->size.width > 0);
 194     assert(view->size.height > 0);
 195
 196
 197     if (view->parent && !view->parent->flags.realized) {
 198         wwarning("trying to realize widget of unrealized parent");
 199         return;
 200     }
 201
 202     if (!view->flags.realized) {
 203         parentWID = view->parent->window;
 204         view->window = XCreateWindow(dpy, parentWID, view->pos.x, view->pos.y,
 205                                      view->size.width, view->size.height, 0,
 206                                      view->screen->depth, InputOutput,
 207                                      view->screen->visual, view->attribFlags,
 208                                      &view->attribs);
 209
 210         XSaveContext(dpy, view->window, ViewContext, (XPointer)view);
 211
 212         view->flags.realized = 1;
 213
 214         if (view->flags.mapWhenRealized) {
 215             W_MapView(view);
 216             view->flags.mapWhenRealized = 0;
 217         }
 218
 219         WMPostNotificationName(WMViewRealizedNotification, view, NULL);
 220     }
 221
 222     /* realize children */
 223     ptr = view->childrenList;
 224     while (ptr!=NULL) {
 225         W_RealizeView(ptr);
 226
 227         ptr = ptr->nextSister;
 228     }
 229 }
 230
 231
 232
 233 Bool
 234 W_CheckInternalMessage(W_Screen *scr, XClientMessageEvent *cev, int event)
 235 {
 236     if (cev->message_type == scr->internalMessage
 237         && cev->format == 32 && cev->data.l[1] == event)
 238         return True;
 239     else
 240         return False;
 241 }
 242
 243
 244 void
 245 W_ReparentView(W_View *view, W_View *newParent, int x, int y)
 246 {
 247     Display *dpy = view->screen->display;
 248
 249     assert(!view->flags.topLevel);
 250
 251     unparentView(view);
 252     adoptChildView(newParent, view);
 253
 254     if (view->flags.realized) {
 255         if (newParent->flags.realized) {
 256             XReparentWindow(dpy, view->window, newParent->window, x, y);
 257         } else {
 258             wwarning("trying to reparent realized view to unrealized parent");
 259             return;
 260         }
 261     }
 262
 263     view->pos.x = x;
 264     view->pos.y = y;
 265 }
 266
 267
 268
 269 void
 270 W_MapView(W_View *view)
 271 {
 272     if (!view->flags.mapped) {
 273         if (view->flags.realized) {
 274             XMapRaised(view->screen->display, view->window);
 275             XFlush(view->screen->display);
 276             view->flags.mapped = 1;
 277         } else {
 278             view->flags.mapWhenRealized = 1;
 279         }
 280     }
 281 }
 282
 283
 284 /*
 285  * W_MapSubviews-
 286  *     maps all children of the current view that where already realized.
 287  */
 288 void
 289 W_MapSubviews(W_View *view)
 290 {
 291     XMapSubwindows(view->screen->display, view->window);
 292     XFlush(view->screen->display);
 293
 294     view = view->childrenList;
 295     while (view) {
 296         view->flags.mapped = 1;
 297         view->flags.mapWhenRealized = 0;
 298         view = view->nextSister;
 299     }
 300 }
 301
 302
 303
 304 void
 305 W_UnmapSubviews(W_View *view)
 306 {
 307     XUnmapSubwindows(view->screen->display, view->window);
 308     XFlush(view->screen->display);
 309
 310     view = view->childrenList;
 311     while (view) {
 312         view->flags.mapped = 0;
 313         view->flags.mapWhenRealized = 0;
 314         view = view->nextSister;
 315     }
 316 }
 317
 318
 319
 320 void
 321 W_UnmapView(W_View *view)
 322 {
 323     view->flags.mapWhenRealized = 0;
 324     if (!view->flags.mapped)
 325         return;
 326
 327     XUnmapWindow(view->screen->display, view->window);
 328     XFlush(view->screen->display);
 329
 330     view->flags.mapped = 0;
 331 }
 332
 333
 334 W_View*
 335 W_TopLevelOfView(W_View *view)
 336 {
 337     W_View *toplevel;
 338
 339     for (toplevel=view; !toplevel->flags.topLevel; toplevel=toplevel->parent);
 340
 341     return toplevel;
 342 }
 343
 344
 345 static void
 346 destroyView(W_View *view)
 347 {
 348     W_View *ptr;
 349
 350     if (view->flags.alreadyDead)
 351         return;
 352     view->flags.alreadyDead = 1;
 353
 354     /* delete the balloon text for the view, if there's any */
 355     WMSetBalloonTextForView(NULL, view);
 356
 357     if (view->nextFocusChain)
 358         view->nextFocusChain->prevFocusChain = view->prevFocusChain;
 359     if (view->prevFocusChain)
 360         view->prevFocusChain->nextFocusChain = view->nextFocusChain;
 361
 362     /* Do not leave focus in a inexisting control */
 363     if (W_FocusedViewOfToplevel(W_TopLevelOfView(view))==view)
 364         W_SetFocusOfTopLevel(W_TopLevelOfView(view), NULL);
 365
 366     if (view->flags.topLevel) {
 367         W_FocusInfo *info = view->screen->focusInfo;
 368         /* remove focus information associated to this toplevel */
 369
 370         if (info) {
 371             if (info->toplevel==view) {
 372                 view->screen->focusInfo = info->next;
 373                 free(info);
 374             } else {
 375                 while (info->next) {
 376                     if (info->next->toplevel == view)
 377                         break;
 378                     info = info->next;
 379                 }
 380                 if (info->next) {
 381                     W_FocusInfo *next = info->next->next;
 382                     free(info->next);
 383                     info->next = next;
 384                 }
 385                 /* else the toplevel did not have any focused subview */
 386             }
 387         }
 388     }
 389
 390     /* destroy children recursively */
 391     while (view->childrenList!=NULL) {
 392         ptr = view->childrenList;
 393         ptr->flags.parentDying = 1;
 394
 395         W_DestroyView(ptr);
 396
 397         if (ptr == view->childrenList) {
 398             view->childrenList = ptr->nextSister;
 399             ptr->parent = NULL;
 400         }
 401     }
 402
 403     W_CallDestroyHandlers(view);
 404
 405     if (view->flags.realized) {
 406         XDeleteContext(view->screen->display, view->window, ViewContext);
 407
 408         /* if parent is being destroyed, it will die naturaly */
 409         if (!view->flags.parentDying || view->flags.topLevel)
 410             XDestroyWindow(view->screen->display, view->window);
 411     }
 412
 413     /* remove self from parent's children list */
 414     unparentView(view);
 415
 416     W_CleanUpEvents(view);
 417 #if 0
 418     if (view->dragSourceProcs)
 419         free(view->dragSourceProcs);
 420
 421     if (view->dragDestinationProcs)
 422         free(view->dragDestinationProcs);
 423 #endif
 424     free(view);
 425 }
 426
 427
 428
 429 void
 430 W_DestroyView(W_View *view)
 431 {
 432     W_ReleaseView(view);
 433 }
 434
 435
 436
 437 void
 438 W_MoveView(W_View *view, int x, int y)
 439 {
 440     assert(view->flags.root==0);
 441
 442     if (view->delegate && view->delegate->willMove) {
 443         (*view->delegate->willMove)(view->delegate, view, &x, &y);
 444     }
 445
 446     if (view->pos.x == x && view->pos.y == y)
 447         return;
 448
 449     if (view->flags.realized) {
 450         XMoveWindow(view->screen->display, view->window, x, y);
 451     }
 452     view->pos.x = x;
 453     view->pos.y = y;
 454
 455     if (view->delegate && view->delegate->didMove) {
 456         (*view->delegate->didMove)(view->delegate, view);
 457     }
 458 }
 459
 460
 461 void
 462 W_ResizeView(W_View *view, unsigned int width, unsigned int height)
 463 {
 464     int shrinked;
 465
 466     if (view->delegate && view->delegate->willResize) {
 467         (*view->delegate->willResize)(view->delegate, view, &width, &height);
 468     }
 469
 470     assert(width > 0);
 471     assert(height > 0);
 472
 473     if (view->size.width == width && view->size.height == height)
 474         return;
 475
 476     shrinked = width < view->size.width || height < view->size.height;
 477
 478     if (view->flags.realized) {
 479         XResizeWindow(view->screen->display, view->window, width, height);
 480     }
 481     view->size.width = width;
 482     view->size.height = height;
 483
 484     if (view->delegate && view->delegate->didResize) {
 485         (*view->delegate->didResize)(view->delegate, view);
 486     }
 487
 488     if (view->flags.notifySizeChanged)
 489         WMPostNotificationName(WMViewSizeDidChangeNotification, view, NULL);
 490 }
 491
 492
 493 void
 494 W_RedisplayView(W_View *view)
 495 {
 496     XEvent ev;
 497
 498     if (!view->flags.mapped)
 499         return;
 500
 501     ev.xexpose.type = Expose;
 502     ev.xexpose.display = view->screen->display;
 503     ev.xexpose.window = view->window;
 504     ev.xexpose.count = 0;
 505
 506     WMHandleEvent(&ev);
 507 }
 508
 509
 510 void
 511 W_SetViewBackgroundColor(W_View *view, WMColor *color)
 512 {
 513     if (view->backColor)
 514         WMReleaseColor(view->backColor);
 515     view->backColor = WMRetainColor(color);
 516
 517     view->attribFlags |= CWBackPixel;
 518     view->attribs.background_pixel = color->color.pixel;
 519     if (view->flags.realized) {
 520         XSetWindowBackground(view->screen->display, view->window,
 521                              color->color.pixel);
 522         XClearWindow(view->screen->display, view->window);
 523     }
 524 }
 525
 526
 527
 528 W_View*
 529 W_FocusedViewOfToplevel(W_View *view)
 530 {
 531     WMScreen *scr = view->screen;
 532     W_FocusInfo *info;
 533
 534     for (info = scr->focusInfo; info!=NULL; info = info->next)
 535         if (view == info->toplevel)
 536             break;
 537
 538     if (!info)
 539         return NULL;
 540
 541     return info->focused;
 542 }
 543
 544
 545 void
 546 W_SetFocusOfTopLevel(W_View *toplevel, W_View *view)
 547 {
 548     WMScreen *scr = toplevel->screen;
 549     XEvent event;
 550     W_FocusInfo *info;
 551
 552     for (info = scr->focusInfo; info!=NULL; info = info->next)
 553         if (toplevel == info->toplevel)
 554             break;
 555
 556     if (!info) {
 557         info = wmalloc(sizeof(W_FocusInfo));
 558         info->toplevel = toplevel;
 559         info->focused = view;
 560         info->next = scr->focusInfo;
 561         scr->focusInfo = info;
 562     } else {
 563         event.xfocus.mode = NotifyNormal;
 564         event.xfocus.detail = NotifyDetailNone;
 565         if (info->focused) {
 566             /* simulate FocusOut event */
 567             event.xfocus.type = FocusOut;
 568             W_DispatchMessage(info->focused, &event);
 569         }
 570         info->focused = view;
 571     }
 572     if (view) {
 573         /* simulate FocusIn event */
 574         event.xfocus.type = FocusIn;
 575         W_DispatchMessage(view, &event);
 576     }
 577 }
 578
 579
 580 void
 581 W_BroadcastMessage(W_View *targetParent, XEvent *event)
 582 {
 583     W_View *target;
 584
 585     target = targetParent->childrenList;
 586     while (target!=NULL) {
 587         W_DispatchMessage(target, event);
 588
 589         target = target->nextSister;
 590     }
 591 }
 592
 593
 594 void
 595 W_DispatchMessage(W_View *target, XEvent *event)
 596 {
 597     if (target->window==None)
 598         return;
 599     event->xclient.window = target->window;
 600     event->xclient.display = target->screen->display;
 601
 602     WMHandleEvent(event);
 603     /*
 604     XSendEvent(target->screen->display, target->window, False,
 605                SubstructureNotifyMask, event);
 606      */
 607 }
 608
 609
 610
 611 WMView*
 612 W_RetainView(WMView *view)
 613 {
 614     view->refCount++;
 615     return view;
 616 }
 617
 618
 619
 620 void
 621 W_ReleaseView(WMView *view)
 622 {
 623     view->refCount--;
 624     if (view->refCount < 1) {
 625         destroyView(view);
 626     }
 627 }
 628
 629
 630 WMWidget*
 631 WMWidgetOfView(WMView *view)
 632 {
 633     return view->self;
 634 }
 635
 636
 637 WMSize
 638 WMGetViewSize(WMView *view)
 639 {
 640     return view->size;
 641 }
 642
 643 WMPoint
 644 WMGetViewPosition(WMView *view)
 645 {
 646     return view->pos;
 647 }
 648
 649
 650 void
 651 WMSetViewNotifySizeChanges(WMView *view, Bool flag)
 652 {
 653     view->flags.notifySizeChanged = flag;
 654 }
 655
 656 Window
 657 WMViewXID(WMView *view)
 658 {
 659     return view->window;
 660 }
 661