mirror of
https://github.com/classilla/tenfourfox.git
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625 lines
22 KiB
C++
625 lines
22 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsSVGElement.h"
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#include "DOMSVGPathSegList.h"
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#include "DOMSVGPathSeg.h"
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#include "nsError.h"
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#include "SVGAnimatedPathSegList.h"
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#include "nsCOMPtr.h"
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#include "nsSVGAttrTearoffTable.h"
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#include "SVGPathSegUtils.h"
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#include "mozilla/dom/SVGPathSegListBinding.h"
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// See the comment in this file's header.
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namespace mozilla {
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static inline
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nsSVGAttrTearoffTable<void, DOMSVGPathSegList>&
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SVGPathSegListTearoffTable()
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{
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static nsSVGAttrTearoffTable<void, DOMSVGPathSegList>
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sSVGPathSegListTearoffTable;
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return sSVGPathSegListTearoffTable;
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(DOMSVGPathSegList)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGPathSegList)
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// No unlinking of mElement, we'd need to null out the value pointer (the
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// object it points to is held by the element) and null-check it everywhere.
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGPathSegList)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGPathSegList)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGPathSegList)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGPathSegList)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGPathSegList)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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//----------------------------------------------------------------------
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// Helper class: AutoChangePathSegListNotifier
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// Stack-based helper class to pair calls to WillChangePathSegList and
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// DidChangePathSegList.
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class MOZ_RAII AutoChangePathSegListNotifier
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{
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public:
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explicit AutoChangePathSegListNotifier(DOMSVGPathSegList* aPathSegList MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: mPathSegList(aPathSegList)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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MOZ_ASSERT(mPathSegList, "Expecting non-null pathSegList");
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mEmptyOrOldValue =
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mPathSegList->Element()->WillChangePathSegList();
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}
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~AutoChangePathSegListNotifier()
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{
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mPathSegList->Element()->DidChangePathSegList(mEmptyOrOldValue);
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if (mPathSegList->AttrIsAnimating()) {
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mPathSegList->Element()->AnimationNeedsResample();
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}
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}
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private:
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DOMSVGPathSegList* const mPathSegList;
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nsAttrValue mEmptyOrOldValue;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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/* static */ already_AddRefed<DOMSVGPathSegList>
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DOMSVGPathSegList::GetDOMWrapper(void *aList,
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nsSVGElement *aElement,
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bool aIsAnimValList)
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{
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RefPtr<DOMSVGPathSegList> wrapper =
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SVGPathSegListTearoffTable().GetTearoff(aList);
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if (!wrapper) {
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wrapper = new DOMSVGPathSegList(aElement, aIsAnimValList);
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SVGPathSegListTearoffTable().AddTearoff(aList, wrapper);
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}
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return wrapper.forget();
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}
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/* static */ DOMSVGPathSegList*
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DOMSVGPathSegList::GetDOMWrapperIfExists(void *aList)
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{
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return SVGPathSegListTearoffTable().GetTearoff(aList);
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}
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DOMSVGPathSegList::~DOMSVGPathSegList()
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{
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// There are now no longer any references to us held by script or list items.
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// Note we must use GetAnimValKey/GetBaseValKey here, NOT InternalList()!
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void *key = mIsAnimValList ?
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InternalAList().GetAnimValKey() :
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InternalAList().GetBaseValKey();
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SVGPathSegListTearoffTable().RemoveTearoff(key);
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}
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JSObject*
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DOMSVGPathSegList::WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto)
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{
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return mozilla::dom::SVGPathSegListBinding::Wrap(cx, this, aGivenProto);
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}
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void
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DOMSVGPathSegList::InternalListWillChangeTo(const SVGPathData& aNewValue)
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{
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// When the number of items in our internal counterpart changes, we MUST stay
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// in sync. Everything in the scary comment in
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// DOMSVGLengthList::InternalBaseValListWillChangeTo applies here just as
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// much, but we have the additional issue that failing to stay in sync would
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// mean that - assuming we aren't reading bad memory - we would likely end up
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// decoding command types from argument floats when looking in our
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// SVGPathData's data array! Either way, we'll likely then go down
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// NS_NOTREACHED code paths, or end up reading/setting more bad memory!!
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// The only time that our other DOM list type implementations remove items is
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// if those items become surplus items due to an attribute change or SMIL
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// animation sample shortening the list. In general though, they try to keep
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// their existing DOM items, even when things change. To be consistent, we'd
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// really like to do the same thing. However, because different types of path
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// segment correspond to different DOMSVGPathSeg subclasses, the type of
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// items in our list are generally not the same, which makes this harder for
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// us. We have to remove DOM segments if their type is not the same as the
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// type of the new internal segment at their index.
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//
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// We also need to sync up mInternalDataIndex, but since we need to loop over
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// all the items in the new list checking types anyway, that's almost
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// insignificant in terms of overhead.
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//
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// Note that this method is called on every single SMIL animation resample
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// and we have no way to short circuit the overhead since we don't have a
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// way to tell if the call is due to a new animation, or a resample of an
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// existing animation (when the number and type of items would be the same).
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// (Note that a new animation could start overriding an existing animation at
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// any time, so checking IsAnimating() wouldn't work.) Because we get called
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// on every sample, it would not be acceptable alternative to throw away all
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// our items and let them be recreated lazily, since that would break what
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// script sees!
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uint32_t length = mItems.Length();
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uint32_t index = 0;
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uint32_t dataLength = aNewValue.mData.Length();
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uint32_t dataIndex = 0; // index into aNewValue's raw data array
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uint32_t newSegType;
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RefPtr<DOMSVGPathSegList> kungFuDeathGrip;
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if (length) {
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// RemovingFromList() might clear last reference to |this|.
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// Retain a temporary reference to keep from dying before returning.
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//
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// NOTE: For path-seg lists (unlike other list types), we have to do this
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// *whenever our list is nonempty* (even if we're growing in length).
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// That's because the path-seg-type of any segment could differ between old
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// list vs. new list, which will make us destroy & recreate that segment,
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// which could remove the last reference to us.
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//
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// (We explicitly *don't* want to create a kungFuDeathGrip in the length=0
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// case, though, because we do hit this code inside our constructor before
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// any other owning references have been added, and at that point, the
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// deathgrip-removal would make us die before we exit our constructor.)
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kungFuDeathGrip = this;
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}
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while (index < length && dataIndex < dataLength) {
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newSegType = SVGPathSegUtils::DecodeType(aNewValue.mData[dataIndex]);
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if (ItemAt(index) && ItemAt(index)->Type() != newSegType) {
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ItemAt(index)->RemovingFromList();
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ItemAt(index) = nullptr;
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}
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// Only after the RemovingFromList() can we touch mInternalDataIndex!
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mItems[index].mInternalDataIndex = dataIndex;
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++index;
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dataIndex += 1 + SVGPathSegUtils::ArgCountForType(newSegType);
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}
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MOZ_ASSERT((index == length && dataIndex <= dataLength) ||
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(index <= length && dataIndex == dataLength),
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"very bad - list corruption?");
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if (index < length) {
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// aNewValue has fewer items than our previous internal counterpart
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uint32_t newLength = index;
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// Remove excess items from the list:
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for (; index < length; ++index) {
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if (ItemAt(index)) {
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ItemAt(index)->RemovingFromList();
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ItemAt(index) = nullptr;
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}
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}
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// Only now may we truncate mItems
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mItems.TruncateLength(newLength);
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} else if (dataIndex < dataLength) {
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// aNewValue has more items than our previous internal counterpart
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// Sync mItems:
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while (dataIndex < dataLength) {
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if (mItems.Length() &&
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mItems.Length() - 1 > DOMSVGPathSeg::MaxListIndex()) {
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// It's safe to get out of sync with our internal list as long as we
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// have FEWER items than it does.
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return;
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}
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if (!mItems.AppendElement(ItemProxy(nullptr, dataIndex), fallible)) {
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// OOM
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ErrorResult rv;
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Clear(rv);
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MOZ_ASSERT(!rv.Failed());
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return;
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}
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dataIndex += 1 + SVGPathSegUtils::ArgCountForType(SVGPathSegUtils::DecodeType(aNewValue.mData[dataIndex]));
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}
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}
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MOZ_ASSERT(dataIndex == dataLength, "Serious processing error");
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MOZ_ASSERT(index == length, "Serious counting error");
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}
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bool
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DOMSVGPathSegList::AttrIsAnimating() const
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{
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return InternalAList().IsAnimating();
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}
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bool
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DOMSVGPathSegList::AnimListMirrorsBaseList() const
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{
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return GetDOMWrapperIfExists(InternalAList().GetAnimValKey()) &&
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!AttrIsAnimating();
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}
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SVGPathData&
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DOMSVGPathSegList::InternalList() const
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{
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SVGAnimatedPathSegList *alist = mElement->GetAnimPathSegList();
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return mIsAnimValList && alist->IsAnimating() ? *alist->mAnimVal : alist->mBaseVal;
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}
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SVGAnimatedPathSegList&
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DOMSVGPathSegList::InternalAList() const
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{
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MOZ_ASSERT(mElement->GetAnimPathSegList(), "Internal error");
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return *mElement->GetAnimPathSegList();
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}
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// ----------------------------------------------------------------------------
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// nsIDOMSVGPathSegList implementation:
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void
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DOMSVGPathSegList::Clear(ErrorResult& aError)
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{
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if (IsAnimValList()) {
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aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return;
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}
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if (LengthNoFlush() > 0) {
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AutoChangePathSegListNotifier notifier(this);
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// DOM list items that are to be removed must be removed before we change
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// the internal list, otherwise they wouldn't be able to copy their
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// internal counterparts' values!
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InternalListWillChangeTo(SVGPathData()); // clears mItems
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if (!AttrIsAnimating()) {
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// The anim val list is in sync with the base val list
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DOMSVGPathSegList *animList =
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GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
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if (animList) {
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animList->InternalListWillChangeTo(SVGPathData()); // clears its mItems
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}
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}
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InternalList().Clear();
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}
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}
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already_AddRefed<DOMSVGPathSeg>
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DOMSVGPathSegList::Initialize(DOMSVGPathSeg& aNewItem, ErrorResult& aError)
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{
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if (IsAnimValList()) {
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aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return nullptr;
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}
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// If aNewItem is already in a list we should insert a clone of aNewItem,
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// and for consistency, this should happen even if *this* is the list that
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// aNewItem is currently in. Note that in the case of aNewItem being in this
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// list, the Clear() call before the InsertItemBefore() call would remove it
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// from this list, and so the InsertItemBefore() call would not insert a
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// clone of aNewItem, it would actually insert aNewItem. To prevent that
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// from happening we have to do the clone here, if necessary.
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RefPtr<DOMSVGPathSeg> domItem = &aNewItem;
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if (aNewItem.HasOwner()) {
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domItem = aNewItem.Clone();
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}
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Clear(aError);
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MOZ_ASSERT(!aError.Failed(), "How could this fail?");
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return InsertItemBefore(*domItem, 0, aError);
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}
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already_AddRefed<DOMSVGPathSeg>
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DOMSVGPathSegList::GetItem(uint32_t index, ErrorResult& error)
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{
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bool found;
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RefPtr<DOMSVGPathSeg> item = IndexedGetter(index, found, error);
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if (!found) {
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error.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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}
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return item.forget();
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}
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already_AddRefed<DOMSVGPathSeg>
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DOMSVGPathSegList::IndexedGetter(uint32_t aIndex, bool& aFound,
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ErrorResult& aError)
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{
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if (IsAnimValList()) {
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Element()->FlushAnimations();
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}
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aFound = aIndex < LengthNoFlush();
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if (aFound) {
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return GetItemAt(aIndex);
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}
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return nullptr;
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}
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already_AddRefed<DOMSVGPathSeg>
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DOMSVGPathSegList::InsertItemBefore(DOMSVGPathSeg& aNewItem,
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uint32_t aIndex,
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ErrorResult& aError)
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{
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if (IsAnimValList()) {
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aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return nullptr;
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}
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uint32_t internalIndex;
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if (aIndex < LengthNoFlush()) {
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internalIndex = mItems[aIndex].mInternalDataIndex;
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} else {
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aIndex = LengthNoFlush();
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internalIndex = InternalList().mData.Length();
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}
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if (aIndex >= DOMSVGPathSeg::MaxListIndex()) {
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aError.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return nullptr;
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}
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RefPtr<DOMSVGPathSeg> domItem = &aNewItem;
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if (domItem->HasOwner()) {
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domItem = domItem->Clone(); // must do this before changing anything!
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}
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uint32_t argCount = SVGPathSegUtils::ArgCountForType(domItem->Type());
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// Ensure we have enough memory so we can avoid complex error handling below:
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if (!mItems.SetCapacity(mItems.Length() + 1, fallible) ||
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!InternalList().mData.SetCapacity(InternalList().mData.Length() + 1 + argCount,
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fallible)) {
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aError.Throw(NS_ERROR_OUT_OF_MEMORY);
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return nullptr;
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}
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if (AnimListMirrorsBaseList()) {
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DOMSVGPathSegList *animVal =
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GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
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MOZ_ASSERT(animVal, "animVal should be a valid pointer");
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if (!animVal->mItems.SetCapacity(
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animVal->mItems.Length() + 1, fallible)) {
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aError.Throw(NS_ERROR_OUT_OF_MEMORY);
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return nullptr;
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}
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}
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AutoChangePathSegListNotifier notifier(this);
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// Now that we know we're inserting, keep animVal list in sync as necessary.
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MaybeInsertNullInAnimValListAt(aIndex, internalIndex, argCount);
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float segAsRaw[1 + NS_SVG_PATH_SEG_MAX_ARGS];
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domItem->ToSVGPathSegEncodedData(segAsRaw);
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MOZ_ALWAYS_TRUE(InternalList().mData.InsertElementsAt(internalIndex,
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segAsRaw,
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1 + argCount,
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fallible));
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MOZ_ALWAYS_TRUE(mItems.InsertElementAt(aIndex,
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ItemProxy(domItem.get(),
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internalIndex),
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fallible));
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// This MUST come after the insertion into InternalList(), or else under the
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// insertion into InternalList() the values read from domItem would be bad
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// data from InternalList() itself!:
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domItem->InsertingIntoList(this, aIndex, IsAnimValList());
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UpdateListIndicesFromIndex(aIndex + 1, argCount + 1);
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return domItem.forget();
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}
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already_AddRefed<DOMSVGPathSeg>
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DOMSVGPathSegList::ReplaceItem(DOMSVGPathSeg& aNewItem,
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uint32_t aIndex,
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ErrorResult& aError)
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{
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if (IsAnimValList()) {
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aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return nullptr;
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}
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if (aIndex >= LengthNoFlush()) {
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aError.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return nullptr;
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}
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RefPtr<DOMSVGPathSeg> domItem = &aNewItem;
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if (domItem->HasOwner()) {
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domItem = domItem->Clone(); // must do this before changing anything!
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}
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AutoChangePathSegListNotifier notifier(this);
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if (ItemAt(aIndex)) {
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// Notify any existing DOM item of removal *before* modifying the lists so
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// that the DOM item can copy the *old* value at its index:
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ItemAt(aIndex)->RemovingFromList();
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}
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uint32_t internalIndex = mItems[aIndex].mInternalDataIndex;
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// We use InternalList() to get oldArgCount since we may not have a DOM
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// wrapper at the index being replaced.
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uint32_t oldType = SVGPathSegUtils::DecodeType(InternalList().mData[internalIndex]);
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// NOTE: ArgCountForType returns a (small) unsigned value, but we're
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// intentionally putting it in a signed variable, because we're going to
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// subtract these values and might produce something negative.
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int32_t oldArgCount = SVGPathSegUtils::ArgCountForType(oldType);
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int32_t newArgCount = SVGPathSegUtils::ArgCountForType(domItem->Type());
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float segAsRaw[1 + NS_SVG_PATH_SEG_MAX_ARGS];
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domItem->ToSVGPathSegEncodedData(segAsRaw);
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if (AnimListMirrorsBaseList()) {
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// The anim val list is in sync with the base val list - remove mirroring
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// animVal item if necessary. We do this *before* touching InternalList()
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// so the removed item can correctly store its internal value.
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DOMSVGPathSegList* animVal =
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GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
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if (animVal->ItemAt(aIndex)) {
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animVal->ItemAt(aIndex)->RemovingFromList();
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|
animVal->ItemAt(aIndex) = nullptr;
|
|
}
|
|
}
|
|
|
|
if (!InternalList().mData.ReplaceElementsAt(internalIndex, 1 + oldArgCount,
|
|
segAsRaw, 1 + newArgCount,
|
|
fallible)) {
|
|
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
|
|
return nullptr;
|
|
}
|
|
ItemAt(aIndex) = domItem;
|
|
|
|
// This MUST come after the ToSVGPathSegEncodedData call, otherwise that call
|
|
// would end up reading bad data from InternalList()!
|
|
domItem->InsertingIntoList(this, aIndex, IsAnimValList());
|
|
|
|
int32_t delta = newArgCount - oldArgCount;
|
|
if (delta != 0) {
|
|
// Sync up the internal indexes of all ItemProxys that come after aIndex:
|
|
UpdateListIndicesFromIndex(aIndex + 1, delta);
|
|
if (AnimListMirrorsBaseList()) {
|
|
// The anim val list is in sync with the base val list
|
|
DOMSVGPathSegList* animVal =
|
|
GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
|
|
animVal->UpdateListIndicesFromIndex(aIndex + 1, delta);
|
|
}
|
|
}
|
|
|
|
return domItem.forget();
|
|
}
|
|
|
|
already_AddRefed<DOMSVGPathSeg>
|
|
DOMSVGPathSegList::RemoveItem(uint32_t aIndex,
|
|
ErrorResult& aError)
|
|
{
|
|
if (IsAnimValList()) {
|
|
aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
if (aIndex >= LengthNoFlush()) {
|
|
aError.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
|
|
return nullptr;
|
|
}
|
|
// We have to return the removed item, so get it, creating it if necessary:
|
|
RefPtr<DOMSVGPathSeg> result = GetItemAt(aIndex);
|
|
|
|
AutoChangePathSegListNotifier notifier(this);
|
|
// Notify the DOM item of removal *before* modifying the lists so that the
|
|
// DOM item can copy its *old* value:
|
|
ItemAt(aIndex)->RemovingFromList();
|
|
|
|
uint32_t internalIndex = mItems[aIndex].mInternalDataIndex;
|
|
uint32_t segType = SVGPathSegUtils::DecodeType(InternalList().mData[internalIndex]);
|
|
// NOTE: ArgCountForType returns a (small) unsigned value, but we're
|
|
// intentionally putting it in a signed value, because we're going to
|
|
// negate it, and you can't negate an unsigned value.
|
|
int32_t argCount = SVGPathSegUtils::ArgCountForType(segType);
|
|
|
|
// Now that we know we're removing, keep animVal list in sync as necessary.
|
|
// Do this *before* touching InternalList() so the removed item can get its
|
|
// internal value.
|
|
MaybeRemoveItemFromAnimValListAt(aIndex, argCount);
|
|
|
|
InternalList().mData.RemoveElementsAt(internalIndex, 1 + argCount);
|
|
mItems.RemoveElementAt(aIndex);
|
|
|
|
UpdateListIndicesFromIndex(aIndex, -(argCount + 1));
|
|
|
|
return result.forget();
|
|
}
|
|
|
|
already_AddRefed<DOMSVGPathSeg>
|
|
DOMSVGPathSegList::GetItemAt(uint32_t aIndex)
|
|
{
|
|
MOZ_ASSERT(aIndex < mItems.Length());
|
|
|
|
if (!ItemAt(aIndex)) {
|
|
ItemAt(aIndex) = DOMSVGPathSeg::CreateFor(this, aIndex, IsAnimValList());
|
|
}
|
|
RefPtr<DOMSVGPathSeg> result = ItemAt(aIndex);
|
|
return result.forget();
|
|
}
|
|
|
|
void
|
|
DOMSVGPathSegList::
|
|
MaybeInsertNullInAnimValListAt(uint32_t aIndex,
|
|
uint32_t aInternalIndex,
|
|
uint32_t aArgCountForItem)
|
|
{
|
|
MOZ_ASSERT(!IsAnimValList(), "call from baseVal to animVal");
|
|
|
|
if (!AnimListMirrorsBaseList()) {
|
|
return;
|
|
}
|
|
|
|
// The anim val list is in sync with the base val list
|
|
DOMSVGPathSegList *animVal =
|
|
GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
|
|
|
|
MOZ_ASSERT(animVal, "AnimListMirrorsBaseList() promised a non-null animVal");
|
|
MOZ_ASSERT(animVal->mItems.Length() == mItems.Length(),
|
|
"animVal list not in sync!");
|
|
MOZ_ALWAYS_TRUE(animVal->mItems.InsertElementAt(aIndex,
|
|
ItemProxy(nullptr,
|
|
aInternalIndex),
|
|
fallible));
|
|
|
|
animVal->UpdateListIndicesFromIndex(aIndex + 1, 1 + aArgCountForItem);
|
|
}
|
|
|
|
void
|
|
DOMSVGPathSegList::
|
|
MaybeRemoveItemFromAnimValListAt(uint32_t aIndex,
|
|
int32_t aArgCountForItem)
|
|
{
|
|
MOZ_ASSERT(!IsAnimValList(), "call from baseVal to animVal");
|
|
|
|
if (!AnimListMirrorsBaseList()) {
|
|
return;
|
|
}
|
|
|
|
// This needs to be a strong reference; otherwise, the RemovingFromList call
|
|
// below might drop the last reference to animVal before we're done with it.
|
|
RefPtr<DOMSVGPathSegList> animVal =
|
|
GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
|
|
|
|
MOZ_ASSERT(animVal, "AnimListMirrorsBaseList() promised a non-null animVal");
|
|
MOZ_ASSERT(animVal->mItems.Length() == mItems.Length(),
|
|
"animVal list not in sync!");
|
|
|
|
if (animVal->ItemAt(aIndex)) {
|
|
animVal->ItemAt(aIndex)->RemovingFromList();
|
|
}
|
|
animVal->mItems.RemoveElementAt(aIndex);
|
|
|
|
animVal->UpdateListIndicesFromIndex(aIndex, -(1 + aArgCountForItem));
|
|
}
|
|
|
|
void
|
|
DOMSVGPathSegList::UpdateListIndicesFromIndex(uint32_t aStartingIndex,
|
|
int32_t aInternalDataIndexDelta)
|
|
{
|
|
uint32_t length = mItems.Length();
|
|
|
|
for (uint32_t i = aStartingIndex; i < length; ++i) {
|
|
mItems[i].mInternalDataIndex += aInternalDataIndexDelta;
|
|
if (ItemAt(i)) {
|
|
ItemAt(i)->UpdateListIndex(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla
|