Source Code for Module library.pyjamas.DOM

   1  # Copyright 2006 James Tauber and contributors 
   2  # 
   3  # Licensed under the Apache License, Version 2.0 (the "License"); 
   4  # you may not use this file except in compliance with the License. 
   5  # You may obtain a copy of the License at 
   6  # 
   7  #     http://www.apache.org/licenses/LICENSE-2.0 
   8  # 
   9  # Unless required by applicable law or agreed to in writing, software 
  10  # distributed under the License is distributed on an "AS IS" BASIS, 
  11  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
  12  # See the License for the specific language governing permissions and 
  13  # limitations under the License. 
  14  """ 
  15      DOM implements the core of Pjamas-Desktop, providing access to 
  16      and management of the DOM model of the PyWebkitGtk window. 
  17  """ 
  18   
  19  import pyjd 
  20   
  21  if pyjd.is_desktop: 
  22      from pyjamas.Window import onResize, onClosing, onClosed 
  23      from __pyjamas__ import JS, doc, get_main_frame, wnd 
  24   
  25      currentEvent = None 
  26   
  27  sCaptureElem = None 
  28  sEventPreviewStack = [] 
  29   
  30  listeners = {} 
  31   
  32  from pyjamas.ui import Event 
  33  from pyjamas.ui.Event import ( 
  34      ONBLUR, 
  35      ONCHANGE, 
  36      ONCLICK, 
  37      ONCONTEXTMENU, 
  38      ONDBLCLICK, 
  39      ONERROR, 
  40      ONFOCUS, 
  41      ONKEYDOWN, 
  42      ONKEYPRESS, 
  43      ONKEYUP, 
  44      ONLOAD, 
  45      ONLOSECAPTURE, 
  46      ONMOUSEDOWN, 
  47      ONMOUSEMOVE, 
  48      ONMOUSEOUT, 
  49      ONMOUSEOVER, 
  50      ONMOUSEUP, 
  51      ONSCROLL, 
  52      ONINPUT 
  53  ) 
  54   
  55  ELEMENT_NODE = 1 
  56  TEXT_NODE = 3 
  57  DOCUMENT_NODE = 9 
  58   
  59 -def get_listener(item): 
  60      if item is None: 
  61          return None 
  62      if hasattr(item, "__instance__"): 
  63          ret = listeners.get(item.__instance__) 
  64      else: 
  65          ret = listeners.get(hash(item)) 
  66      return ret 
  67   
  68   
  69 -def set_listener(item, listener): 
  70      if hasattr(item, "__instance__"): 
  71          listeners[item.__instance__] = listener 
  72      elif listener is None: 
  73          listeners.pop(hash(item)) 
  74      else: 
  75          listeners[hash(item)] = listener 
  76   
  77  # ugh, *spew*, *hurl* http://code.google.com/p/pyjamas/issues/detail?id=213 
  78  hack_timer_workaround_bug_button = None 
  79   
  80   
  81 -def init(): 
  82      mf = get_main_frame() 
  83      mf._addWindowEventListener("click", browser_event_cb) 
  84      mf._addWindowEventListener("change", browser_event_cb) 
  85      mf._addWindowEventListener("mouseout", browser_event_cb) 
  86      mf._addWindowEventListener("mousedown", browser_event_cb) 
  87      mf._addWindowEventListener("mouseup", browser_event_cb) 
  88      mf._addWindowEventListener("resize", browser_event_cb) 
  89      mf._addWindowEventListener("keyup", browser_event_cb) 
  90      mf._addWindowEventListener("keydown", browser_event_cb) 
  91      mf._addWindowEventListener("keypress", browser_event_cb) 
  92      mf._addWindowEventListener("mousewheel", browser_event_cb) 
  93   
  94 -def _init_testing(): 
  95      body = doc().getElementsByTagName("body")[0] 
  96      mf._addEventListener(body, "click", cb) 
  97      mf._addEventListener(body, "change", cb) 
  98      mf._addEventListener(body, "mouseout", cb) 
  99      mf._addEventListener(body, "mousedown", cb) 
 100      mf._addEventListener(body, "mouseup", cb) 
 101      mf._addEventListener(body, "mousemove", cb) 
 102      mf._addEventListener(body, "resize", cb) 
 103      mf._addEventListener(body, "keyup", cb) 
 104      mf._addEventListener(body, "keydown", cb) 
 105      mf._addEventListener(body, "keypress", cb) 
 106   
 107 -def _dispatchWindowEvent(sender, evt, useCap): 
 108      pass 
 109   
 110   
 111 -def _dispatchEvent(sender, evt, useCap): 
 112   
 113      if evt is None: 
 114          evt = wnd().event 
 115      else: 
 116          try: 
 117              sender = get_main_frame().gobject_wrap(sender) # webkit HACK! 
 118              evt = get_main_frame().gobject_wrap(evt) # webkit HACK! 
 119          except: 
 120              pass 
 121      listener = None 
 122      curElem = sender 
 123   
 124      #print "_dispatchEvent", sender, evt, evt.type 
 125      cap = getCaptureElement() 
 126      listener = get_listener(cap) 
 127      if cap and (listener is not None): 
 128          #print "capture _dispatchEvent", cap, listener 
 129          dispatchEvent(evt, cap, listener) 
 130          evt.stopPropagation() 
 131          return 
 132   
 133      while curElem and (get_listener(curElem) is None): 
 134          #print "no parent listener", curElem, getParent(curElem) 
 135          curElem = getParent(curElem) 
 136      if curElem and getNodeType(curElem) != 1: 
 137          curElem = None 
 138   
 139      listener = get_listener(curElem) 
 140      if listener is not None: 
 141          dispatchEvent(evt, curElem, listener) 
 142   
 143   
 144 -def _dispatchCapturedMouseEvent(evt): 
 145   
 146      #print "dcmsev" 
 147      if not _dispatchCapturedEvent(evt): 
 148          return 
 149      cap = getCaptureElement() 
 150      listener = get_listener(cap) 
 151      if cap and (listener is not None): 
 152          dispatchEvent(evt, cap, listener) 
 153          #print "dcmsev, stop propagation" 
 154          evt.stopPropagation() 
 155   
 156   
 157 -def _dispatchCapturedMouseoutEvent(evt): 
 158      cap = getCaptureElement() 
 159      #print "cap", evt, cap 
 160      if cap is None: 
 161          return 
 162      #print "cap", evt, cap 
 163      if eventGetToElement(evt): 
 164          return 
 165      #print "synthesise", cap 
 166      #When the mouse leaves the window during capture, release capture 
 167      #and synthesize an 'onlosecapture' event. 
 168      setCapture(None) 
 169      listener = get_listener(cap) 
 170      if listener is None: 
 171          return 
 172      # this should be interesting... 
 173      #print "lose capture synthesised" 
 174      lcEvent = doc().createEvent('UIEvent') 
 175      lcEvent.initUIEvent('losecapture', False, False, wnd(), 0) 
 176      dispatchEvent(lcEvent, cap, listener) 
 177   
 178   
 179 -def browser_event_cb(view, event, from_window): 
 180   
 181      global sCaptureElem 
 182      #print "sCaptureElem", sCaptureElem 
 183      if event is None: 
 184          event = wnd().event 
 185      else: 
 186          try: 
 187              event = get_main_frame().gobject_wrap(event) # webkit HACK! 
 188          except: 
 189              pass 
 190   
 191      #print "browser_event_cb", event 
 192      et = eventGetType(event) 
 193      #print "browser_event_cb", event, et 
 194      if et == "resize": 
 195          onResize() 
 196          return 
 197      if et == 'mouseout': 
 198          #print "mouse out", event 
 199          _dispatchCapturedMouseoutEvent(event) 
 200      if (et == 'keyup' or et == 'keydown' or 
 201            et == 'keypress' or et == 'change'): 
 202          return _dispatchCapturedEvent(event) 
 203      else: 
 204          return _dispatchCapturedMouseEvent(event) 
 205   
 206   
 207 -def _dispatchCapturedEvent(event): 
 208   
 209      if not previewEvent(event): 
 210          #print "dce, stop propagation" 
 211          event.stopPropagation() 
 212          eventPreventDefault(event) 
 213          return False 
 214      return True 
 215   
 216   
 217 -def addEventPreview(preview): 
 218      sEventPreviewStack.append(preview) 
 219   
 220   
 221 -def appendChild(parent, child): 
 222      #print "appendChild", parent, child 
 223      parent.appendChild(child) 
 224   
 225 -def removeChild(parent, child): 
 226      #print "removeChild", parent, child 
 227      parent.removeChild(child) 
 228      #print "after removeChild", parent, child 
 229   
 230 -def replaceChild(parent, newChild, oldChild): 
 231      parent.replaceChild(newChild, oldChild) 
 232   
 233   
 234 -def buttonClick(element): 
 235      evt = doc().createEvent('MouseEvents') 
 236      evt.initMouseEvent("click", True, True, wnd(), 1, 0, 0, 0, 0, False, 
 237                          False, False, False, 0, element) 
 238      element.dispatchEvent(evt) 
 239   
 240   
 241 -def compare(elem1, elem2): 
 242      if hasattr(elem1, "isSameNode") and hasattr(elem2, "isSameNode"): 
 243          return elem1.isSameNode(elem2) 
 244      return elem1 == elem2 
 245   
 246   
 247 -def createAnchor(): 
 248      return createElement("A") 
 249   
 250   
 251 -def createButton(): 
 252      return createElement("button") 
 253   
 254   
 255 -def createCol(): 
 256      return createElement("col") 
 257   
 258   
 259 -def createDiv(): 
 260      return createElement("div") 
 261   
 262   
 263 -def createElement(tag): 
 264      return doc().createElement(tag) 
 265   
 266   
 267 -def createFieldSet(): 
 268      return createElement("fieldset") 
 269   
 270   
 271 -def createForm(): 
 272      return createElement("form") 
 273   
 274   
 275 -def createIFrame(): 
 276      return createElement("iframe") 
 277   
 278   
 279 -def createImg(): 
 280      return createElement("img") 
 281   
 282   
 283 -def createInputCheck(): 
 284      return createInputElement("checkbox") 
 285   
 286   
 287 -def createInputElement(elementType): 
 288      e = createElement("input") 
 289      e.type = elementType 
 290      return e 
 291   
 292   
 293 -def createInputPassword(): 
 294      return createInputElement("password") 
 295   
 296   
 297 -def createInputRadio(group): 
 298      e = createInputElement('radio') 
 299      e.name = group 
 300      return e 
 301   
 302   
 303 -def createInputText(): 
 304      return createInputElement("text") 
 305   
 306   
 307 -def createLabel(): 
 308      return createElement("label") 
 309   
 310   
 311 -def createLegend(): 
 312      return createElement("legend") 
 313   
 314   
 315 -def createOptions(): 
 316      return createElement("options") 
 317   
 318   
 319 -def createSelect(): 
 320      return createElement("select") 
 321   
 322   
 323 -def createSpan(): 
 324      return createElement("span") 
 325   
 326   
 327 -def createTable(): 
 328      return createElement("table") 
 329   
 330   
 331 -def createTBody(): 
 332      return createElement("tbody") 
 333   
 334   
 335 -def createTD(): 
 336      return createElement("td") 
 337   
 338   
 339 -def createTextArea(): 
 340      return createElement("textarea") 
 341   
 342   
 343 -def createTH(): 
 344      return createElement("th") 
 345   
 346   
 347 -def createTR(): 
 348      return createElement("tr") 
 349   
 350   
 351 -def eventStopPropagation(evt): 
 352      evt.stopPropagation() 
 353   
 354   
 355 -def eventCancelBubble(evt, cancel): 
 356      evt.cancelBubble = cancel 
 357   
 358   
 359 -def eventGetAltKey(evt): 
 360      return evt.altKey 
 361   
 362   
 363 -def eventGetButton(evt): 
 364      return evt.button 
 365   
 366   
 367 -def eventGetClientX(evt): 
 368      return evt.clientX 
 369   
 370   
 371 -def eventGetClientY(evt): 
 372      return evt.clientY 
 373   
 374   
 375 -def eventGetCtrlKey(evt): 
 376      return evt.ctrlKey 
 377   
 378   
 379 -def eventGetFromElement(evt): 
 380      try: 
 381          return evt.fromElement 
 382      except: 
 383          return None 
 384   
 385   
 386 -def eventGetKeyCode(evt): 
 387      return evt.which or evt.keyCode or 0 
 388   
 389   
 390 -def eventGetRepeat(evt): 
 391      return evt.repeat 
 392   
 393   
 394 -def eventGetScreenX(evt): 
 395      return evt.screenX 
 396   
 397   
 398 -def eventGetScreenY(evt): 
 399      return evt.screenY 
 400   
 401   
 402 -def eventGetShiftKey(evt): 
 403      return evt.shiftKey 
 404   
 405   
 406 -def eventGetCurrentTarget(event): 
 407      return event.currentTarget 
 408   
 409   
 410 -def eventGetTarget(event): 
 411      return event.target 
 412   
 413   
 414 -def eventGetToElement(evt): 
 415      type = eventGetType(evt) 
 416      if type == 'mouseout': 
 417          return evt.relatedTarget 
 418      elif type == 'mouseover': 
 419          return evt.target 
 420      return None 
 421   
 422   
 423 -def eventGetType(event): 
 424      return event.type 
 425   
 426 -def eventGetTypeInt(event): 
 427      return Event.eventmap.get(str(event.type), 0) 
 428   
 429   
 430 -def eventGetTypeString(event): 
 431      return eventGetType(event) 
 432   
 433   
 434 -def eventPreventDefault(evt): 
 435      evt.preventDefault() 
 436   
 437   
 438 -def eventSetKeyCode(evt, key): 
 439      evt.keyCode = key 
 440   
 441   
 442 -def eventToString(evt): 
 443      return evt.toString() 
 444   
 445   
 446 -def iframeGetSrc(elem): 
 447      return elem.src 
 448   
 449   
 450 -def getAbsoluteLeft(elem): 
 451      left = 0 
 452      curr = elem 
 453      while curr.offsetParent: 
 454          left -= curr.scrollLeft 
 455          curr = curr.parentNode 
 456   
 457      while elem: 
 458          left += elem.offsetLeft - elem.scrollLeft 
 459          elem = elem.offsetParent 
 460   
 461      return left 
 462   
 463   
 464 -def getAbsoluteTop(elem): 
 465      top = 0 
 466      curr = elem 
 467      while curr.offsetParent: 
 468          top -= curr.scrollTop 
 469          curr = curr.parentNode 
 470   
 471      while elem: 
 472          top += elem.offsetTop - elem.scrollTop 
 473          elem = elem.offsetParent 
 474   
 475      return top 
 476   
 477   
 478 -def getAttribute(elem, attr): 
 479      attr = getattr(elem, attr) 
 480      if attr is None: 
 481          return None 
 482      return str(attr) 
 483   
 484   
 485 -def getElemAttribute(elem, attr): 
 486      mf = get_main_frame() 
 487      if not elem.hasAttribute(attr): 
 488          return str(getattr(elem, mf.mash_attrib(attr))) 
 489      return str(elem.getAttribute(attr)) 
 490   
 491   
 492 -def getBooleanAttribute(elem, attr): 
 493      mf = get_main_frame() 
 494      return bool(getattr(elem, mf.mash_attrib(attr))) 
 495   
 496   
 497 -def getBooleanElemAttribute(elem, attr): 
 498      if not elem.hasAttribute(attr): 
 499          return None 
 500      return bool(elem.getAttribute(attr)) 
 501   
 502   
 503 -def getCaptureElement(): 
 504      global sCaptureElem 
 505      return sCaptureElem 
 506   
 507   
 508 -def getChild(elem, index): 
 509      """ 
 510      Get a child of the DOM element by specifying an index. 
 511      """ 
 512      count = 0 
 513      child = elem.firstChild 
 514      while child: 
 515          next = child.nextSibling 
 516          if child.nodeType == 1: 
 517              if index == count: 
 518                  return child 
 519              count += 1 
 520          child = next 
 521      return None 
 522   
 523   
 524 -def getChildCount(elem): 
 525      """ 
 526      Calculate the number of children the given element has.  This loops 
 527      over all the children of that element and counts them. 
 528      """ 
 529      count = 0 
 530      child = elem.firstChild 
 531      while child: 
 532          if child.nodeType == 1: 
 533              count += 1 
 534          child = child.nextSibling 
 535      return count 
 536   
 537   
 538 -def getChildIndex(parent, toFind): 
 539      """ 
 540      Return the index of the given child in the given parent. 
 541   
 542      This performs a linear search. 
 543      """ 
 544      count = 0 
 545      child = parent.firstChild 
 546      while child: 
 547          if child == toFind: 
 548              return count 
 549          if child.nodeType == 1: 
 550              count += 1 
 551          child = child.nextSibling 
 552   
 553      return -1 
 554   
 555   
 556 -def getElementById(id): 
 557      """ 
 558      Return the element in the document's DOM tree with the given id. 
 559      """ 
 560      return doc().getElementById(id) 
 561   
 562   
 563 -def getEventListener(element): 
 564      """ 
 565      See setEventListener() for more information. 
 566      """ 
 567      return get_listener(element) 
 568   
 569  eventbitsmap = {} 
 570   
 571   
 572 -def getEventsSunk(element): 
 573      """ 
 574      Return which events are currently "sunk" for a given DOM node.  See 
 575      sinkEvents() for more information. 
 576      """ 
 577      return eventbitsmap.get(element, 0) 
 578   
 579   
 580 -def getFirstChild(elem): 
 581      child = elem and elem.firstChild 
 582      while child and child.nodeType != 1: 
 583          child = child.nextSibling 
 584      return child 
 585   
 586   
 587 -def getLastChild(elem): 
 588      child = elem and elem.lastChild 
 589      while child and child.nodeType != 1: 
 590          child = child.previousSibling 
 591      return child 
 592   
 593   
 594 -def getInnerHTML(element): 
 595      try: 
 596          return element and element.innerHtml # webkit. erk. 
 597      except: 
 598          return element and element.innerHTML # hulahop / xul.  yuk. 
 599   
 600   
 601 -def getInnerText(element): 
 602      # To mimic IE's 'innerText' property in the W3C DOM, we need to recursively 
 603      # concatenate all child text nodes (depth first). 
 604      text = '' 
 605      child = element.firstChild 
 606      while child: 
 607          if child.nodeType == 1: 
 608              text += getInnerText(child) 
 609          elif child.nodeValue: 
 610              text += child.nodeValue 
 611          child = child.nextSibling 
 612      return text 
 613   
 614   
 615 -def getIntAttribute(elem, attr): 
 616      return int(getattr(elem, attr)) 
 617   
 618   
 619 -def getIntElemAttribute(elem, attr): 
 620      if not elem.hasAttribute(attr): 
 621          return None 
 622      return int(elem.getAttribute(attr)) 
 623   
 624   
 625 -def getIntStyleAttribute(elem, attr): 
 626      return getIntAttribute(elem.style, attr) 
 627   
 628   
 629 -def getPrevSibling(elem): 
 630      sib = elem.previousSibling 
 631      while sib and sib.nodeType != 1: 
 632          sib = sib.previousSibling 
 633      return sib 
 634   
 635   
 636 -def getNextSibling(elem): 
 637      sib = elem.nextSibling 
 638      while sib and sib.nodeType != 1: 
 639          sib = sib.nextSibling 
 640      return sib 
 641   
 642   
 643 -def getNodeType(elem): 
 644      return elem.nodeType 
 645   
 646   
 647 -def getParent(elem): 
 648      parent = elem.parentNode 
 649      if parent is None: 
 650          return None 
 651      if getNodeType(parent) != 1: 
 652          return None 
 653      return parent 
 654   
 655   
 656 -def getStyleAttribute(elem, attr): 
 657      try: 
 658          if hasattr(elem.style, 'getPropertyValue'): 
 659              return elem.style.getPropertyValue(mash_name_for_glib(attr)) 
 660          elif hasattr(elem.style, 'getProperty'): 
 661              return elem.style.getProperty(mash_name_for_glib(attr)) 
 662          return elem.style.getAttribute(attr) 
 663      except AttributeError: 
 664          return getattr(elem.style, attr, None) 
 665   
 666   
 667 -def insertChild(parent, toAdd, index): 
 668      count = 0 
 669      child = parent.firstChild 
 670      before = None 
 671      while child: 
 672          if child.nodeType == 1: 
 673              if (count == index): 
 674                  before = child 
 675                  break 
 676   
 677              count += 1 
 678          child = child.nextSibling 
 679   
 680      if before is None: 
 681          parent.appendChild(toAdd) 
 682      else: 
 683          parent.insertBefore(toAdd, before) 
 684   
 685   
 686 -class IterChildrenClass: 
 687   
 688 -    def __init__(self, elem): 
 689          self.parent = elem 
 690          self.child = elem.firstChild 
 691          self.lastChild = None 
 692   
 693 -    def next(self): 
 694          if not self.child: 
 695              raise StopIteration 
 696          self.lastChild = self.child 
 697          self.child = getNextSibling(self.child) 
 698          return self.lastChild 
 699   
 700 -    def remove(self): 
 701          self.parent.removeChild(self.lastChild) 
 702   
 703 -    def __iter__(self): 
 704          return self 
 705   
 706   
 707 -def iterChildren(elem): 
 708      """ 
 709      Returns an iterator over all the children of the given 
 710      DOM node. 
 711      """ 
 712      return IterChildrenClass(elem) 
 713   
 714   
 715 -class IterWalkChildren: 
 716   
 717 -    def __init__(self, elem, all_nodes=False): 
 718          self.parent = elem 
 719          self.all_nodes = all_nodes 
 720          if all_nodes: 
 721              self.child = elem.firstChild 
 722          else: 
 723              self.child = getFirstChild(elem) 
 724          self.lastChild = None 
 725          self.stack = [] 
 726   
 727 -    def next(self): 
 728          if not self.child: 
 729              raise StopIteration 
 730          self.lastChild = self.child 
 731          if self.all_nodes: 
 732              firstChild = self.child.firstChild 
 733              nextSibling = self.child.nextSibling 
 734          else: 
 735              firstChild = getFirstChild(self.child) 
 736              nextSibling = getNextSibling(self.child) 
 737          if firstChild is not None: 
 738              if nextSibling is not None: 
 739                  self.stack.append((nextSibling, self.parent)) 
 740              self.parent = self.child 
 741              self.child = firstChild 
 742          elif nextSibling is not None: 
 743              self.child = nextSibling 
 744          elif len(self.stack) > 0: 
 745              (self.child, self.parent) = self.stack.pop() 
 746          else: 
 747              self.child = None 
 748          return self.lastChild 
 749   
 750 -    def remove(self): 
 751          self.parent.removeChild(self.lastChild) 
 752   
 753 -    def __iter__(self): 
 754          return self 
 755   
 756   
 757 -def walkChildren(elem): 
 758      """ 
 759      Walk an entire subtree of the DOM.  This returns an 
 760      iterator/iterable which performs a pre-order traversal 
 761      of all the children of the given element. 
 762      """ 
 763      return IterWalkChildren(elem) 
 764   
 765   
 766 -def isOrHasChild(parent, child): 
 767      while child: 
 768          if compare(parent, child): 
 769              return True 
 770          child = child.parentNode 
 771          if not child: 
 772              return False 
 773          if child.nodeType != 1: 
 774              child = None 
 775      return False 
 776   
 777   
 778 -def releaseCapture(elem): 
 779      #print "releaseCapture", elem 
 780      global sCaptureElem 
 781      if sCaptureElem and compare(elem, sCaptureElem): 
 782          sCaptureElem = None 
 783          releaseCapture_impl(elem) 
 784      return 
 785   
 786  # browser-specific overrides may implement this 
 787 -def releaseCapture_impl(elem): pass 
 788   
 789 -def removeEventPreview(preview): 
 790      sEventPreviewStack.remove(preview) 
 791   
 792   
 793 -def getOffsetHeight(elem): 
 794      return elem.offsetHeight 
 795   
 796   
 797 -def getOffsetWidth(elem): 
 798      return elem.offsetWidth 
 799   
 800   
 801 -def scrollIntoView(elem): 
 802      left = elem.offsetLeft 
 803      top = elem.offsetTop 
 804      width = elem.offsetWidth 
 805      height = elem.offsetHeight 
 806   
 807      if elem.parentNode != elem.offsetParent: 
 808          left -= elem.parentNode.offsetLeft 
 809          top -= elem.parentNode.offsetTop 
 810   
 811      cur = elem.parentNode 
 812      while cur and cur.nodeType == 1: 
 813          if hasattr(cur, 'style') and hasattr(cur.style, 'overflow') and \ 
 814             (cur.style.overflow == 'auto' or cur.style.overflow == 'scroll'): 
 815              if left < cur.scrollLeft: 
 816                  cur.scrollLeft = left 
 817              if left + width > cur.scrollLeft + cur.clientWidth: 
 818                  cur.scrollLeft = (left + width) - cur.clientWidth 
 819              if top < cur.scrollTop: 
 820                  cur.scrollTop = top 
 821              if top + height > cur.scrollTop + cur.clientHeight: 
 822                  cur.scrollTop = (top + height) - cur.clientHeight 
 823   
 824          offsetLeft = cur.offsetLeft 
 825          offsetTop = cur.offsetTop 
 826          if cur.parentNode != cur.offsetParent: 
 827              if hasattr(cur.parentNode, "offsetLeft"): 
 828                  offsetLeft -= cur.parentNode.offsetLeft 
 829              if hasattr(cur.parentNode, "offsetTop"): 
 830                  offsetTop -= cur.parentNode.offsetTop 
 831   
 832          left += offsetLeft - cur.scrollLeft 
 833          top += offsetTop - cur.scrollTop 
 834          cur = cur.parentNode 
 835   
 836   
 837 -def mash_name_for_glib(name, joiner='-'): 
 838      res = '' 
 839      for c in name: 
 840          if c.isupper(): 
 841              res += joiner + c.lower() 
 842          else: 
 843              res += c 
 844      return res 
 845   
 846   
 847 -def removeAttribute(element, attribute): 
 848      element.removeAttribute(attribute) 
 849   
 850   
 851 -def setAttribute(element, attribute, value): 
 852      #print element, attribute, value 
 853      setattr(element, attribute, value) 
 854   
 855   
 856 -def setElemAttribute(element, attribute, value): 
 857      element.setAttribute(attribute, value) 
 858   
 859   
 860 -def setBooleanAttribute(elem, attr, value): 
 861      mf = get_main_frame() 
 862      setattr(elem, mf.mash_attrib(attr), value) 
 863   
 864   
 865 -def setCapture(elem): 
 866      global sCaptureElem 
 867      sCaptureElem = elem 
 868      #print "setCapture", sCaptureElem 
 869      setCapture_impl(elem) 
 870   
 871  # browser-specific overrides may implement this 
 872 -def setCapture_impl(elem): pass 
 873   
 874 -def setEventListener(element, listener): 
 875      """ 
 876      Register an object to receive event notifications for the given 
 877      element.  The listener's onBrowserEvent() method will be called 
 878      when a captured event occurs.  To set which events are captured, 
 879      use sinkEvents(). 
 880      """ 
 881      set_listener(element, listener) 
 882   
 883   
 884 -def createTextNode(txt): 
 885      return doc().createTextNode(txt) 
 886   
 887   
 888 -def setInnerHTML(element, html): 
 889      try: 
 890          element.innerHtml = html # webkit. yuk. 
 891      except: 
 892          element.innerHTML = html # hulahop / xul.  yukk. 
 893   
 894   
 895 -def setInnerText(elem, text): 
 896      #Remove all children first. 
 897      while elem.firstChild is not None: 
 898          elem.removeChild(elem.firstChild) 
 899      elem.appendChild(createTextNode(text or '')) 
 900   
 901   
 902 -def setIntElemAttribute(elem, attr, value): 
 903      elem.setAttribute(attr, str(value)) 
 904   
 905   
 906 -def setIntAttribute(elem, attr, value): 
 907      setattr(elem, attr, int(value)) 
 908   
 909   
 910 -def setIntStyleAttribute(elem, attr, value): 
 911      mf = get_main_frame() 
 912      if hasattr(elem.style, 'setProperty'): 
 913          elem.style.setProperty(mf.mash_attrib(attr), str(value), "") 
 914      else: 
 915          elem.style.setAttribute(mf.mash_attrib(attr), str(value), "") 
 916   
 917   
 918 -def setOptionText(select, text, index): 
 919      option = select.options.item(index) 
 920      option.textContent = text 
 921   
 922   
 923 -def setStyleAttribute(element, name, value): 
 924      if hasattr(element.style, 'setProperty'): 
 925          element.style.setProperty(mash_name_for_glib(name), value, "") 
 926      else: 
 927          element.style.setAttribute(name, value, "") 
 928   
 929 -def setStyleAttributes(element, **kwargs): 
 930     """ 
 931     multi attr: setStyleAttributes(self, {attr1:val1, attr2:val2, ...}) 
 932     """ 
 933     for attr, val in kwargs.items(): 
 934          if hasattr(element.style, 'setProperty'): 
 935                  element.style.setProperty(mash_name_for_glib(attr), val, "") 
 936          else: 
 937                  element.style.setAttribute(attr, val, "") 
 938   
 939 -def sinkEvents(element, bits): 
 940      """ 
 941      Set which events should be captured on a given element and passed to the 
 942      registered listener.  To set the listener, use setEventListener(). 
 943   
 944      @param bits: A combination of bits; see ui.Event for bit values 
 945      """ 
 946      mask = getEventsSunk(element) ^ bits 
 947      eventbitsmap[element] = bits 
 948      if not mask: 
 949          return 
 950   
 951      bits = mask 
 952   
 953      if not bits: 
 954          return 
 955      mf = get_main_frame() 
 956      if hasattr(mf, "_addEventListener"): 
 957          aev = mf._addEventListener 
 958      else: 
 959          aev = mf.addEventListener 
 960      #cb = lambda x,y,z: _dispatchEvent(y) 
 961      cb = _dispatchEvent 
 962   
 963      # mozilla stupidly has DOMMouseScroll... 
 964      sinkEventsMozilla(element, bits) 
 965   
 966      bit = 1 
 967      while bits: 
 968          if bit > bits: 
 969              raise RuntimeError("sinkEvents: bit outruns bits") 
 970          if (bits & bit): 
 971              for event_name in Event.eventbits[bit][1]: 
 972                  aev(element, event_name, cb) 
 973              bits ^= bit 
 974          bit <<= 1 
 975   
 976 -def sinkEventsMozilla(element, bits): 
 977      pass 
 978   
 979 -def toString(elem): 
 980      temp = elem.cloneNode(True) 
 981      tempDiv = createDiv() 
 982      tempDiv.appendChild(temp) 
 983      outer = getInnerHTML(tempDiv) 
 984      setInnerHTML(temp, "") 
 985      return outer 
 986   
 987   
 988  # TODO: missing dispatchEventAndCatch 
 989 -def dispatchEvent(event, element, listener): 
 990      dispatchEventImpl(event, element, listener) 
 991   
 992   
 993 -def previewEvent(evt): 
 994      #print "previewEvent", sEventPreviewStack 
 995      if len(sEventPreviewStack) == 0: 
 996          return True 
 997      preview = sEventPreviewStack[-1] 
 998      ret = preview.onEventPreview(evt) 
 999      if ret: 
1000          return True 
1001   
1002      #print "previewEvent, cancel, prevent default" 
1003      if evt: 
1004          eventCancelBubble(evt, True) 
1005          eventPreventDefault(evt) 
1006   
1007      return ret 
1008   
1009   
1010  # TODO 
1011 -def dispatchEventAndCatch(evt, elem, listener, handler): 
1012      pass 
1013   
1014  currentEvent = None 
1015   
1016   
1017 -def dispatchEventImpl(event, element, listener): 
1018      global sCaptureElem 
1019      global currentEvent 
1020      if element == sCaptureElem: 
1021          if eventGetType(event) == "losecapture": 
1022              #print "lose capture" 
1023              sCaptureElem = None 
1024      #print "dispatchEventImpl", listener, eventGetType(event) 
1025      prevCurrentEvent = currentEvent 
1026      currentEvent = event 
1027      listener.onBrowserEvent(event) 
1028      currentEvent = prevCurrentEvent 
1029   
1030   
1031 -def eventGetCurrentEvent(): 
1032      return currentEvent 
1033   
1034   
1035 -def insertListItem(select, item, value, index): 
1036      option = createElement("OPTION") 
1037      setInnerText(option, item) 
1038      if value is not None: 
1039          setAttribute(option, "value", value) 
1040      if index == -1: 
1041          appendChild(select, option) 
1042      else: 
1043          insertChild(select, option, index) 
1044   
1045   
1046 -def getBodyOffsetTop(): 
1047      return 0 
1048   
1049   
1050 -def getBodyOffsetLeft(): 
1051      return 0 
1052   
1053 -def eventGetMouseWheelVelocityY(evt): 
1054      """ these are all different, across all platforms! 
1055      """ 
1056      pass 
1057   
1058   
1059  if not pyjd.is_desktop: 
1060      init() 
1061