1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla SVG Project code.
16 : *
17 : * The Initial Developer of the Original Code is the Mozilla Foundation.
18 : * Portions created by the Initial Developer are Copyright (C) 2010
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : *
23 : * Alternatively, the contents of this file may be used under the terms of
24 : * either the GNU General Public License Version 2 or later (the "GPL"), or
25 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26 : * in which case the provisions of the GPL or the LGPL are applicable instead
27 : * of those above. If you wish to allow use of your version of this file only
28 : * under the terms of either the GPL or the LGPL, and not to allow others to
29 : * use your version of this file under the terms of the MPL, indicate your
30 : * decision by deleting the provisions above and replace them with the notice
31 : * and other provisions required by the GPL or the LGPL. If you do not delete
32 : * the provisions above, a recipient may use your version of this file under
33 : * the terms of any one of the MPL, the GPL or the LGPL.
34 : *
35 : * ***** END LICENSE BLOCK ***** */
36 :
37 : #include "nsSVGElement.h"
38 : #include "DOMSVGPathSegList.h"
39 : #include "DOMSVGPathSeg.h"
40 : #include "nsDOMError.h"
41 : #include "SVGAnimatedPathSegList.h"
42 : #include "nsCOMPtr.h"
43 : #include "nsSVGAttrTearoffTable.h"
44 : #include "SVGPathSegUtils.h"
45 : #include "dombindings.h"
46 : #include "nsContentUtils.h"
47 :
48 : // See the comment in this file's header.
49 :
50 : namespace mozilla {
51 :
52 : static nsSVGAttrTearoffTable<void, DOMSVGPathSegList>
53 1464 : sSVGPathSegListTearoffTable;
54 :
55 1464 : NS_IMPL_CYCLE_COLLECTION_CLASS(DOMSVGPathSegList)
56 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGPathSegList)
57 : // No unlinking of mElement, we'd need to null out the value pointer (the
58 : // object it points to is held by the element) and null-check it everywhere.
59 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
60 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
61 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGPathSegList)
62 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mElement, nsIContent)
63 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
64 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
65 0 : NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGPathSegList)
66 0 : NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
67 0 : NS_IMPL_CYCLE_COLLECTION_TRACE_END
68 :
69 0 : NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGPathSegList)
70 0 : NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGPathSegList)
71 :
72 : } // namespace mozilla
73 : DOMCI_DATA(SVGPathSegList, mozilla::DOMSVGPathSegList)
74 : namespace mozilla {
75 :
76 0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGPathSegList)
77 0 : NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
78 0 : NS_INTERFACE_MAP_ENTRY(nsIDOMSVGPathSegList)
79 0 : NS_INTERFACE_MAP_ENTRY(nsISupports)
80 0 : NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(SVGPathSegList)
81 0 : NS_INTERFACE_MAP_END
82 :
83 :
84 : /* static */ already_AddRefed<DOMSVGPathSegList>
85 0 : DOMSVGPathSegList::GetDOMWrapper(void *aList,
86 : nsSVGElement *aElement,
87 : bool aIsAnimValList)
88 : {
89 : DOMSVGPathSegList *wrapper =
90 0 : sSVGPathSegListTearoffTable.GetTearoff(aList);
91 0 : if (!wrapper) {
92 0 : wrapper = new DOMSVGPathSegList(aElement, aIsAnimValList);
93 0 : sSVGPathSegListTearoffTable.AddTearoff(aList, wrapper);
94 : }
95 0 : NS_ADDREF(wrapper);
96 0 : return wrapper;
97 : }
98 :
99 : /* static */ DOMSVGPathSegList*
100 0 : DOMSVGPathSegList::GetDOMWrapperIfExists(void *aList)
101 : {
102 0 : return sSVGPathSegListTearoffTable.GetTearoff(aList);
103 : }
104 :
105 0 : DOMSVGPathSegList::~DOMSVGPathSegList()
106 : {
107 : // There are now no longer any references to us held by script or list items.
108 : // Note we must use GetAnimValKey/GetBaseValKey here, NOT InternalList()!
109 : void *key = mIsAnimValList ?
110 0 : InternalAList().GetAnimValKey() :
111 0 : InternalAList().GetBaseValKey();
112 0 : sSVGPathSegListTearoffTable.RemoveTearoff(key);
113 0 : }
114 :
115 : JSObject*
116 0 : DOMSVGPathSegList::WrapObject(JSContext *cx, XPCWrappedNativeScope *scope,
117 : bool *triedToWrap)
118 : {
119 : return mozilla::dom::binding::SVGPathSegList::create(cx, scope, this,
120 0 : triedToWrap);
121 : }
122 :
123 : nsIDOMSVGPathSeg*
124 0 : DOMSVGPathSegList::GetItemAt(PRUint32 aIndex)
125 : {
126 0 : if (IsAnimValList()) {
127 0 : Element()->FlushAnimations();
128 : }
129 0 : if (aIndex < Length()) {
130 0 : EnsureItemAt(aIndex);
131 0 : return ItemAt(aIndex);
132 : }
133 0 : return nsnull;
134 : }
135 :
136 : void
137 0 : DOMSVGPathSegList::InternalListWillChangeTo(const SVGPathData& aNewValue)
138 : {
139 : // When the number of items in our internal counterpart changes, we MUST stay
140 : // in sync. Everything in the scary comment in
141 : // DOMSVGLengthList::InternalBaseValListWillChangeTo applies here just as
142 : // much, but we have the additional issue that failing to stay in sync would
143 : // mean that - assuming we aren't reading bad memory - we would likely end up
144 : // decoding command types from argument floats when looking in our
145 : // SVGPathData's data array! Either way, we'll likely then go down
146 : // NS_NOTREACHED code paths, or end up reading/setting more bad memory!!
147 :
148 : // The only time that our other DOM list type implementations remove items is
149 : // if those items become surplus items due to an attribute change or SMIL
150 : // animation sample shortening the list. In general though, they try to keep
151 : // their existing DOM items, even when things change. To be consistent, we'd
152 : // really like to do the same thing. However, because different types of path
153 : // segment correspond to different DOMSVGPathSeg subclasses, the type of
154 : // items in our list are generally not the same, which makes this harder for
155 : // us. We have to remove DOM segments if their type is not the same as the
156 : // type of the new internal segment at their index.
157 : //
158 : // We also need to sync up mInternalDataIndex, but since we need to loop over
159 : // all the items in the new list checking types anyway, that's almost
160 : // insignificant in terms of overhead.
161 : //
162 : // Note that this method is called on every single SMIL animation resample
163 : // and we have no way to short circuit the overhead since we don't have a
164 : // way to tell if the call is due to a new animation, or a resample of an
165 : // existing animation (when the number and type of items would be the same).
166 : // (Note that a new animation could start overriding an existing animation at
167 : // any time, so checking IsAnimating() wouldn't work.) Because we get called
168 : // on every sample, it would not be acceptable alternative to throw away all
169 : // our items and let them be recreated lazily, since that would break what
170 : // script sees!
171 :
172 0 : PRUint32 length = mItems.Length();
173 0 : PRUint32 index = 0;
174 :
175 0 : PRUint32 dataLength = aNewValue.mData.Length();
176 0 : PRUint32 dataIndex = 0; // index into aNewValue's raw data array
177 :
178 : PRUint32 newSegType;
179 :
180 0 : nsRefPtr<DOMSVGPathSegList> kungFuDeathGrip;
181 0 : if (length) {
182 : // RemovingFromList() might clear last reference to |this|.
183 : // Retain a temporary reference to keep from dying before returning.
184 : //
185 : // NOTE: For path-seg lists (unlike other list types), we have to do this
186 : // *whenever our list is nonempty* (even if we're growing in length).
187 : // That's because the path-seg-type of any segment could differ between old
188 : // list vs. new list, which will make us destroy & recreate that segment,
189 : // which could remove the last reference to us.
190 : //
191 : // (We explicitly *don't* want to create a kungFuDeathGrip in the length=0
192 : // case, though, because we do hit this code inside our constructor before
193 : // any other owning references have been added, and at that point, the
194 : // deathgrip-removal would make us die before we exit our constructor.)
195 0 : kungFuDeathGrip = this;
196 : }
197 :
198 0 : while (index < length && dataIndex < dataLength) {
199 0 : newSegType = SVGPathSegUtils::DecodeType(aNewValue.mData[dataIndex]);
200 0 : if (ItemAt(index) && ItemAt(index)->Type() != newSegType) {
201 0 : ItemAt(index)->RemovingFromList();
202 0 : ItemAt(index) = nsnull;
203 : }
204 : // Only after the RemovingFromList() can we touch mInternalDataIndex!
205 0 : mItems[index].mInternalDataIndex = dataIndex;
206 0 : ++index;
207 0 : dataIndex += 1 + SVGPathSegUtils::ArgCountForType(newSegType);
208 : }
209 :
210 0 : NS_ABORT_IF_FALSE((index == length && dataIndex <= dataLength) ||
211 : (index <= length && dataIndex == dataLength),
212 : "very bad - list corruption?");
213 :
214 0 : if (index < length) {
215 : // aNewValue has fewer items than our previous internal counterpart
216 :
217 0 : PRUint32 newLength = index;
218 :
219 : // Remove excess items from the list:
220 0 : for (; index < length; ++index) {
221 0 : if (ItemAt(index)) {
222 0 : ItemAt(index)->RemovingFromList();
223 0 : ItemAt(index) = nsnull;
224 : }
225 : }
226 :
227 : // Only now may we truncate mItems
228 0 : mItems.SetLength(newLength);
229 :
230 0 : } else if (dataIndex < dataLength) {
231 : // aNewValue has more items than our previous internal counterpart
232 :
233 : // Sync mItems:
234 0 : while (dataIndex < dataLength) {
235 0 : if (mItems.Length() &&
236 0 : mItems.Length() - 1 > DOMSVGPathSeg::MaxListIndex()) {
237 : // It's safe to get out of sync with our internal list as long as we
238 : // have FEWER items than it does.
239 : return;
240 : }
241 0 : if (!mItems.AppendElement(ItemProxy(nsnull, dataIndex))) {
242 : // OOM
243 0 : Clear();
244 : return;
245 : }
246 0 : dataIndex += 1 + SVGPathSegUtils::ArgCountForType(SVGPathSegUtils::DecodeType(aNewValue.mData[dataIndex]));
247 : }
248 : }
249 :
250 0 : NS_ABORT_IF_FALSE(dataIndex == dataLength, "Serious processing error");
251 0 : NS_ABORT_IF_FALSE(index == length, "Serious counting error");
252 : }
253 :
254 : bool
255 0 : DOMSVGPathSegList::AttrIsAnimating() const
256 : {
257 0 : return InternalAList().IsAnimating();
258 : }
259 :
260 : SVGPathData&
261 0 : DOMSVGPathSegList::InternalList() const
262 : {
263 0 : SVGAnimatedPathSegList *alist = mElement->GetAnimPathSegList();
264 0 : return mIsAnimValList && alist->IsAnimating() ? *alist->mAnimVal : alist->mBaseVal;
265 : }
266 :
267 : SVGAnimatedPathSegList&
268 0 : DOMSVGPathSegList::InternalAList() const
269 : {
270 0 : NS_ABORT_IF_FALSE(mElement->GetAnimPathSegList(), "Internal error");
271 0 : return *mElement->GetAnimPathSegList();
272 : }
273 :
274 : // ----------------------------------------------------------------------------
275 : // nsIDOMSVGPathSegList implementation:
276 :
277 : NS_IMETHODIMP
278 0 : DOMSVGPathSegList::GetNumberOfItems(PRUint32 *aNumberOfItems)
279 : {
280 0 : if (IsAnimValList()) {
281 0 : Element()->FlushAnimations();
282 : }
283 0 : *aNumberOfItems = Length();
284 0 : return NS_OK;
285 : }
286 :
287 : NS_IMETHODIMP
288 0 : DOMSVGPathSegList::Clear()
289 : {
290 0 : if (IsAnimValList()) {
291 0 : return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
292 : }
293 :
294 0 : if (Length() > 0) {
295 0 : nsAttrValue emptyOrOldValue = Element()->WillChangePathSegList();
296 : // DOM list items that are to be removed must be removed before we change
297 : // the internal list, otherwise they wouldn't be able to copy their
298 : // internal counterparts' values!
299 :
300 0 : InternalListWillChangeTo(SVGPathData()); // clears mItems
301 :
302 0 : if (!AttrIsAnimating()) {
303 : // The anim val list is in sync with the base val list
304 : DOMSVGPathSegList *animList =
305 0 : GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
306 0 : if (animList) {
307 0 : animList->InternalListWillChangeTo(SVGPathData()); // clears its mItems
308 : }
309 : }
310 :
311 0 : InternalList().Clear();
312 0 : Element()->DidChangePathSegList(emptyOrOldValue);
313 0 : if (AttrIsAnimating()) {
314 0 : Element()->AnimationNeedsResample();
315 : }
316 : }
317 0 : return NS_OK;
318 : }
319 :
320 : NS_IMETHODIMP
321 0 : DOMSVGPathSegList::Initialize(nsIDOMSVGPathSeg *aNewItem,
322 : nsIDOMSVGPathSeg **_retval)
323 : {
324 0 : *_retval = nsnull;
325 0 : if (IsAnimValList()) {
326 0 : return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
327 : }
328 :
329 : // If aNewItem is already in a list we should insert a clone of aNewItem,
330 : // and for consistency, this should happen even if *this* is the list that
331 : // aNewItem is currently in. Note that in the case of aNewItem being in this
332 : // list, the Clear() call before the InsertItemBefore() call would remove it
333 : // from this list, and so the InsertItemBefore() call would not insert a
334 : // clone of aNewItem, it would actually insert aNewItem. To prevent that
335 : // from happening we have to do the clone here, if necessary.
336 :
337 0 : nsCOMPtr<DOMSVGPathSeg> domItem = do_QueryInterface(aNewItem);
338 0 : if (!domItem) {
339 0 : return NS_ERROR_DOM_SVG_WRONG_TYPE_ERR;
340 : }
341 0 : if (domItem->HasOwner()) {
342 0 : aNewItem = domItem->Clone();
343 : }
344 :
345 0 : Clear();
346 0 : return InsertItemBefore(aNewItem, 0, _retval);
347 : }
348 :
349 : NS_IMETHODIMP
350 0 : DOMSVGPathSegList::GetItem(PRUint32 aIndex,
351 : nsIDOMSVGPathSeg **_retval)
352 : {
353 0 : *_retval = GetItemAt(aIndex);
354 0 : if (!*_retval) {
355 0 : return NS_ERROR_DOM_INDEX_SIZE_ERR;
356 : }
357 0 : NS_ADDREF(*_retval);
358 0 : return NS_OK;
359 : }
360 :
361 : NS_IMETHODIMP
362 0 : DOMSVGPathSegList::InsertItemBefore(nsIDOMSVGPathSeg *aNewItem,
363 : PRUint32 aIndex,
364 : nsIDOMSVGPathSeg **_retval)
365 : {
366 0 : *_retval = nsnull;
367 0 : if (IsAnimValList()) {
368 0 : return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
369 : }
370 :
371 : PRUint32 internalIndex;
372 0 : if (aIndex < Length()) {
373 0 : internalIndex = mItems[aIndex].mInternalDataIndex;
374 : } else {
375 0 : aIndex = Length();
376 0 : internalIndex = InternalList().mData.Length();
377 : }
378 0 : if (aIndex >= DOMSVGPathSeg::MaxListIndex()) {
379 0 : return NS_ERROR_DOM_INDEX_SIZE_ERR;
380 : }
381 :
382 0 : nsCOMPtr<DOMSVGPathSeg> domItem = do_QueryInterface(aNewItem);
383 0 : if (!domItem) {
384 0 : return NS_ERROR_DOM_SVG_WRONG_TYPE_ERR;
385 : }
386 0 : if (domItem->HasOwner()) {
387 0 : domItem = domItem->Clone(); // must do this before changing anything!
388 : }
389 :
390 0 : PRUint32 argCount = SVGPathSegUtils::ArgCountForType(domItem->Type());
391 :
392 : // Ensure we have enough memory so we can avoid complex error handling below:
393 0 : if (!mItems.SetCapacity(mItems.Length() + 1) ||
394 0 : !InternalList().mData.SetCapacity(InternalList().mData.Length() + 1 + argCount)) {
395 0 : return NS_ERROR_OUT_OF_MEMORY;
396 : }
397 :
398 0 : nsAttrValue emptyOrOldValue = Element()->WillChangePathSegList();
399 : // Now that we know we're inserting, keep animVal list in sync as necessary.
400 0 : MaybeInsertNullInAnimValListAt(aIndex, internalIndex, argCount);
401 :
402 : float segAsRaw[1 + NS_SVG_PATH_SEG_MAX_ARGS];
403 0 : domItem->ToSVGPathSegEncodedData(segAsRaw);
404 :
405 0 : InternalList().mData.InsertElementsAt(internalIndex, segAsRaw, 1 + argCount);
406 0 : mItems.InsertElementAt(aIndex, ItemProxy(domItem.get(), internalIndex));
407 :
408 : // This MUST come after the insertion into InternalList(), or else under the
409 : // insertion into InternalList() the values read from domItem would be bad
410 : // data from InternalList() itself!:
411 0 : domItem->InsertingIntoList(this, aIndex, IsAnimValList());
412 :
413 0 : UpdateListIndicesFromIndex(aIndex + 1, argCount + 1);
414 :
415 0 : Element()->DidChangePathSegList(emptyOrOldValue);
416 0 : if (AttrIsAnimating()) {
417 0 : Element()->AnimationNeedsResample();
418 : }
419 0 : *_retval = domItem.forget().get();
420 0 : return NS_OK;
421 : }
422 :
423 : NS_IMETHODIMP
424 0 : DOMSVGPathSegList::ReplaceItem(nsIDOMSVGPathSeg *aNewItem,
425 : PRUint32 aIndex,
426 : nsIDOMSVGPathSeg **_retval)
427 : {
428 0 : *_retval = nsnull;
429 0 : if (IsAnimValList()) {
430 0 : return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
431 : }
432 :
433 0 : nsCOMPtr<DOMSVGPathSeg> domItem = do_QueryInterface(aNewItem);
434 0 : if (!domItem) {
435 0 : return NS_ERROR_DOM_SVG_WRONG_TYPE_ERR;
436 : }
437 0 : if (aIndex >= Length()) {
438 0 : return NS_ERROR_DOM_INDEX_SIZE_ERR;
439 : }
440 0 : if (domItem->HasOwner()) {
441 0 : domItem = domItem->Clone(); // must do this before changing anything!
442 : }
443 :
444 0 : nsAttrValue emptyOrOldValue = Element()->WillChangePathSegList();
445 0 : if (ItemAt(aIndex)) {
446 : // Notify any existing DOM item of removal *before* modifying the lists so
447 : // that the DOM item can copy the *old* value at its index:
448 0 : ItemAt(aIndex)->RemovingFromList();
449 : }
450 :
451 0 : PRUint32 internalIndex = mItems[aIndex].mInternalDataIndex;
452 : // We use InternalList() to get oldArgCount since we may not have a DOM
453 : // wrapper at the index being replaced.
454 0 : PRUint32 oldType = SVGPathSegUtils::DecodeType(InternalList().mData[internalIndex]);
455 0 : PRUint32 oldArgCount = SVGPathSegUtils::ArgCountForType(oldType);
456 0 : PRUint32 newArgCount = SVGPathSegUtils::ArgCountForType(domItem->Type());
457 :
458 : float segAsRaw[1 + NS_SVG_PATH_SEG_MAX_ARGS];
459 0 : domItem->ToSVGPathSegEncodedData(segAsRaw);
460 :
461 0 : bool ok = !!InternalList().mData.ReplaceElementsAt(
462 : internalIndex, 1 + oldArgCount,
463 0 : segAsRaw, 1 + newArgCount);
464 0 : if (!ok) {
465 0 : return NS_ERROR_OUT_OF_MEMORY;
466 : }
467 0 : ItemAt(aIndex) = domItem;
468 :
469 : // This MUST come after the ToSVGPathSegEncodedData call, otherwise that call
470 : // would end up reading bad data from InternalList()!
471 0 : domItem->InsertingIntoList(this, aIndex, IsAnimValList());
472 :
473 0 : PRUint32 delta = newArgCount - oldArgCount;
474 0 : if (delta != 0) {
475 0 : for (PRUint32 i = aIndex + 1; i < Length(); ++i) {
476 0 : mItems[i].mInternalDataIndex += delta;
477 : }
478 : }
479 :
480 0 : Element()->DidChangePathSegList(emptyOrOldValue);
481 0 : if (AttrIsAnimating()) {
482 0 : Element()->AnimationNeedsResample();
483 : }
484 0 : NS_ADDREF(*_retval = domItem.get());
485 0 : return NS_OK;
486 : }
487 :
488 : NS_IMETHODIMP
489 0 : DOMSVGPathSegList::RemoveItem(PRUint32 aIndex,
490 : nsIDOMSVGPathSeg **_retval)
491 : {
492 0 : *_retval = nsnull;
493 0 : if (IsAnimValList()) {
494 0 : return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
495 : }
496 :
497 0 : if (aIndex >= Length()) {
498 0 : return NS_ERROR_DOM_INDEX_SIZE_ERR;
499 : }
500 : // We have to return the removed item, so make sure it exists:
501 0 : EnsureItemAt(aIndex);
502 :
503 0 : nsAttrValue emptyOrOldValue = Element()->WillChangePathSegList();
504 : // Notify the DOM item of removal *before* modifying the lists so that the
505 : // DOM item can copy its *old* value:
506 0 : ItemAt(aIndex)->RemovingFromList();
507 0 : NS_ADDREF(*_retval = ItemAt(aIndex));
508 :
509 0 : PRUint32 internalIndex = mItems[aIndex].mInternalDataIndex;
510 0 : PRUint32 segType = SVGPathSegUtils::DecodeType(InternalList().mData[internalIndex]);
511 0 : PRUint32 argCount = SVGPathSegUtils::ArgCountForType(segType);
512 :
513 : // Now that we know we're removing, keep animVal list in sync as necessary.
514 : // Do this *before* touching InternalList() so the removed item can get its
515 : // internal value.
516 0 : MaybeRemoveItemFromAnimValListAt(aIndex, argCount);
517 :
518 0 : InternalList().mData.RemoveElementsAt(internalIndex, 1 + argCount);
519 0 : mItems.RemoveElementAt(aIndex);
520 :
521 0 : UpdateListIndicesFromIndex(aIndex, -(argCount + 1));
522 :
523 0 : Element()->DidChangePathSegList(emptyOrOldValue);
524 0 : if (AttrIsAnimating()) {
525 0 : Element()->AnimationNeedsResample();
526 : }
527 0 : return NS_OK;
528 : }
529 :
530 : NS_IMETHODIMP
531 0 : DOMSVGPathSegList::AppendItem(nsIDOMSVGPathSeg *aNewItem,
532 : nsIDOMSVGPathSeg **_retval)
533 : {
534 0 : return InsertItemBefore(aNewItem, Length(), _retval);
535 : }
536 :
537 : NS_IMETHODIMP
538 0 : DOMSVGPathSegList::GetLength(PRUint32 *aNumberOfItems)
539 : {
540 0 : return GetNumberOfItems(aNumberOfItems);
541 : }
542 :
543 : void
544 0 : DOMSVGPathSegList::EnsureItemAt(PRUint32 aIndex)
545 : {
546 0 : if (!ItemAt(aIndex)) {
547 0 : ItemAt(aIndex) = DOMSVGPathSeg::CreateFor(this, aIndex, IsAnimValList());
548 : }
549 0 : }
550 :
551 : void
552 0 : DOMSVGPathSegList::
553 : MaybeInsertNullInAnimValListAt(PRUint32 aIndex,
554 : PRUint32 aInternalIndex,
555 : PRUint32 aArgCountForItem)
556 : {
557 0 : NS_ABORT_IF_FALSE(!IsAnimValList(), "call from baseVal to animVal");
558 :
559 0 : if (AttrIsAnimating()) {
560 : // animVal not a clone of baseVal
561 0 : return;
562 : }
563 :
564 : // The anim val list is in sync with the base val list
565 : DOMSVGPathSegList *animVal =
566 0 : GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
567 0 : if (!animVal) {
568 : // No animVal list wrapper
569 0 : return;
570 : }
571 :
572 0 : NS_ABORT_IF_FALSE(animVal->mItems.Length() == mItems.Length(),
573 : "animVal list not in sync!");
574 :
575 0 : animVal->mItems.InsertElementAt(aIndex, ItemProxy(nsnull, aInternalIndex));
576 :
577 0 : animVal->UpdateListIndicesFromIndex(aIndex + 1, 1 + aArgCountForItem);
578 : }
579 :
580 : void
581 0 : DOMSVGPathSegList::
582 : MaybeRemoveItemFromAnimValListAt(PRUint32 aIndex,
583 : PRUint32 aArgCountForItem)
584 : {
585 0 : NS_ABORT_IF_FALSE(!IsAnimValList(), "call from baseVal to animVal");
586 :
587 0 : if (AttrIsAnimating()) {
588 : // animVal not a clone of baseVal
589 0 : return;
590 : }
591 :
592 : // This needs to be a strong reference; otherwise, the RemovingFromList call
593 : // below might drop the last reference to animVal before we're done with it.
594 : nsRefPtr<DOMSVGPathSegList> animVal =
595 0 : GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
596 0 : if (!animVal) {
597 : // No animVal list wrapper
598 : return;
599 : }
600 :
601 0 : NS_ABORT_IF_FALSE(animVal->mItems.Length() == mItems.Length(),
602 : "animVal list not in sync!");
603 :
604 0 : if (animVal->ItemAt(aIndex)) {
605 0 : animVal->ItemAt(aIndex)->RemovingFromList();
606 : }
607 0 : animVal->mItems.RemoveElementAt(aIndex);
608 :
609 0 : animVal->UpdateListIndicesFromIndex(aIndex, -(1 + aArgCountForItem));
610 : }
611 :
612 : void
613 0 : DOMSVGPathSegList::UpdateListIndicesFromIndex(PRUint32 aStartingIndex,
614 : PRInt32 aInternalDataIndexDelta)
615 : {
616 0 : PRUint32 length = mItems.Length();
617 :
618 0 : for (PRUint32 i = aStartingIndex; i < length; ++i) {
619 0 : mItems[i].mInternalDataIndex += aInternalDataIndexDelta;
620 0 : if (ItemAt(i)) {
621 0 : ItemAt(i)->UpdateListIndex(i);
622 : }
623 : }
624 0 : }
625 :
626 4392 : } // namespace mozilla
|