mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-29 21:25:35 +00:00
384 lines
13 KiB
C++
384 lines
13 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 "DOMSVGPathSeg.h"
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#include "DOMSVGPathSegList.h"
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#include "SVGAnimatedPathSegList.h"
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#include "nsSVGElement.h"
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#include "nsError.h"
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// See the architecture comment in DOMSVGPathSegList.h.
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namespace mozilla {
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// We could use NS_IMPL_CYCLE_COLLECTION(, except that in Unlink() we need to
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// clear our list's weak ref to us to be safe. (The other option would be to
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// not unlink and rely on the breaking of the other edges in the cycle, as
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// NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)
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NS_IMPL_CYCLE_COLLECTION_CLASS(DOMSVGPathSeg)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGPathSeg)
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// We may not belong to a list, so we must null check tmp->mList.
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if (tmp->mList) {
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tmp->mList->ItemAt(tmp->mListIndex) = nullptr;
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}
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)
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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(DOMSVGPathSeg)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)
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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(DOMSVGPathSeg)
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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_COLLECTION_ROOT_NATIVE(DOMSVGPathSeg, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(DOMSVGPathSeg, Release)
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//----------------------------------------------------------------------
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// Helper class: AutoChangePathSegNotifier
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// Stack-based helper class to pair calls to WillChangePathSegList
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// and DidChangePathSegList.
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class MOZ_RAII AutoChangePathSegNotifier
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{
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public:
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explicit AutoChangePathSegNotifier(DOMSVGPathSeg* aPathSeg MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: mPathSeg(aPathSeg)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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MOZ_ASSERT(mPathSeg, "Expecting non-null pathSeg");
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MOZ_ASSERT(mPathSeg->HasOwner(),
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"Expecting list to have an owner for notification");
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mEmptyOrOldValue =
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mPathSeg->Element()->WillChangePathSegList();
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}
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~AutoChangePathSegNotifier()
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{
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mPathSeg->Element()->DidChangePathSegList(mEmptyOrOldValue);
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if (mPathSeg->mList->AttrIsAnimating()) {
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mPathSeg->Element()->AnimationNeedsResample();
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}
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}
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private:
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DOMSVGPathSeg* const mPathSeg;
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nsAttrValue mEmptyOrOldValue;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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DOMSVGPathSeg::DOMSVGPathSeg(DOMSVGPathSegList *aList,
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uint32_t aListIndex,
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bool aIsAnimValItem)
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: mList(aList)
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, mListIndex(aListIndex)
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, mIsAnimValItem(aIsAnimValItem)
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{
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// These shifts are in sync with the members in the header.
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MOZ_ASSERT(aList && aListIndex <= MaxListIndex(), "bad arg");
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MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPathSeg!");
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}
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DOMSVGPathSeg::DOMSVGPathSeg()
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: mList(nullptr)
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, mListIndex(0)
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, mIsAnimValItem(false)
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{
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}
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void
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DOMSVGPathSeg::InsertingIntoList(DOMSVGPathSegList *aList,
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uint32_t aListIndex,
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bool aIsAnimValItem)
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{
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MOZ_ASSERT(!HasOwner(), "Inserting item that is already in a list");
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mList = aList;
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mListIndex = aListIndex;
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mIsAnimValItem = aIsAnimValItem;
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MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPathSeg!");
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}
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void
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DOMSVGPathSeg::RemovingFromList()
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{
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uint32_t argCount = SVGPathSegUtils::ArgCountForType(Type());
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// InternalItem() + 1, because the args come after the encoded seg type
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memcpy(PtrToMemberArgs(), InternalItem() + 1, argCount * sizeof(float));
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mList = nullptr;
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mIsAnimValItem = false;
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}
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void
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DOMSVGPathSeg::ToSVGPathSegEncodedData(float* aRaw)
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{
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MOZ_ASSERT(aRaw, "null pointer");
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uint32_t argCount = SVGPathSegUtils::ArgCountForType(Type());
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if (IsInList()) {
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// 1 + argCount, because we're copying the encoded seg type and args
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memcpy(aRaw, InternalItem(), (1 + argCount) * sizeof(float));
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} else {
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aRaw[0] = SVGPathSegUtils::EncodeType(Type());
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// aRaw + 1, because the args go after the encoded seg type
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memcpy(aRaw + 1, PtrToMemberArgs(), argCount * sizeof(float));
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}
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}
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float*
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DOMSVGPathSeg::InternalItem()
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{
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uint32_t dataIndex = mList->mItems[mListIndex].mInternalDataIndex;
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return &(mList->InternalList().mData[dataIndex]);
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}
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#ifdef DEBUG
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bool
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DOMSVGPathSeg::IndexIsValid()
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{
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SVGAnimatedPathSegList *alist = Element()->GetAnimPathSegList();
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return (mIsAnimValItem &&
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mListIndex < alist->GetAnimValue().CountItems()) ||
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(!mIsAnimValItem &&
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mListIndex < alist->GetBaseValue().CountItems());
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}
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#endif
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////////////////////////////////////////////////////////////////////////
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// Implementation of DOMSVGPathSeg sub-classes below this point
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#define IMPL_PROP_WITH_TYPE(segName, propName, index, type) \
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type \
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DOMSVGPathSeg##segName::propName() \
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{ \
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if (mIsAnimValItem && HasOwner()) { \
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Element()->FlushAnimations(); /* May make HasOwner() == false */ \
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} \
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return type(HasOwner() ? InternalItem()[1+index] : mArgs[index]); \
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} \
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void \
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DOMSVGPathSeg##segName::Set##propName(type a##propName, ErrorResult& rv) \
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{ \
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if (mIsAnimValItem) { \
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rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR); \
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return; \
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} \
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if (HasOwner()) { \
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if (InternalItem()[1+index] == float(a##propName)) { \
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return; \
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} \
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AutoChangePathSegNotifier notifier(this); \
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InternalItem()[1+index] = float(a##propName); \
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} else { \
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mArgs[index] = float(a##propName); \
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} \
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}
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// For float, the normal type of arguments
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#define IMPL_FLOAT_PROP(segName, propName, index) \
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IMPL_PROP_WITH_TYPE(segName, propName, index, float)
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// For the boolean flags in arc commands
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#define IMPL_BOOL_PROP(segName, propName, index) \
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IMPL_PROP_WITH_TYPE(segName, propName, index, bool)
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///////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(MovetoAbs, X, 0)
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IMPL_FLOAT_PROP(MovetoAbs, Y, 1)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(MovetoRel, X, 0)
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IMPL_FLOAT_PROP(MovetoRel, Y, 1)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(LinetoAbs, X, 0)
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IMPL_FLOAT_PROP(LinetoAbs, Y, 1)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(LinetoRel, X, 0)
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IMPL_FLOAT_PROP(LinetoRel, Y, 1)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoCubicAbs, X1, 0)
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IMPL_FLOAT_PROP(CurvetoCubicAbs, Y1, 1)
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IMPL_FLOAT_PROP(CurvetoCubicAbs, X2, 2)
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IMPL_FLOAT_PROP(CurvetoCubicAbs, Y2, 3)
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IMPL_FLOAT_PROP(CurvetoCubicAbs, X, 4)
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IMPL_FLOAT_PROP(CurvetoCubicAbs, Y, 5)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoCubicRel, X1, 0)
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IMPL_FLOAT_PROP(CurvetoCubicRel, Y1, 1)
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IMPL_FLOAT_PROP(CurvetoCubicRel, X2, 2)
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IMPL_FLOAT_PROP(CurvetoCubicRel, Y2, 3)
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IMPL_FLOAT_PROP(CurvetoCubicRel, X, 4)
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IMPL_FLOAT_PROP(CurvetoCubicRel, Y, 5)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoQuadraticAbs, X1, 0)
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IMPL_FLOAT_PROP(CurvetoQuadraticAbs, Y1, 1)
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IMPL_FLOAT_PROP(CurvetoQuadraticAbs, X, 2)
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IMPL_FLOAT_PROP(CurvetoQuadraticAbs, Y, 3)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoQuadraticRel, X1, 0)
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IMPL_FLOAT_PROP(CurvetoQuadraticRel, Y1, 1)
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IMPL_FLOAT_PROP(CurvetoQuadraticRel, X, 2)
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IMPL_FLOAT_PROP(CurvetoQuadraticRel, Y, 3)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(ArcAbs, R1, 0)
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IMPL_FLOAT_PROP(ArcAbs, R2, 1)
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IMPL_FLOAT_PROP(ArcAbs, Angle, 2)
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IMPL_BOOL_PROP(ArcAbs, LargeArcFlag, 3)
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IMPL_BOOL_PROP(ArcAbs, SweepFlag, 4)
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IMPL_FLOAT_PROP(ArcAbs, X, 5)
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IMPL_FLOAT_PROP(ArcAbs, Y, 6)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(ArcRel, R1, 0)
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IMPL_FLOAT_PROP(ArcRel, R2, 1)
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IMPL_FLOAT_PROP(ArcRel, Angle, 2)
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IMPL_BOOL_PROP(ArcRel, LargeArcFlag, 3)
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IMPL_BOOL_PROP(ArcRel, SweepFlag, 4)
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IMPL_FLOAT_PROP(ArcRel, X, 5)
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IMPL_FLOAT_PROP(ArcRel, Y, 6)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(LinetoHorizontalAbs, X, 0)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(LinetoHorizontalRel, X, 0)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(LinetoVerticalAbs, Y, 0)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(LinetoVerticalRel, Y, 0)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoCubicSmoothAbs, X2, 0)
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IMPL_FLOAT_PROP(CurvetoCubicSmoothAbs, Y2, 1)
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IMPL_FLOAT_PROP(CurvetoCubicSmoothAbs, X, 2)
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IMPL_FLOAT_PROP(CurvetoCubicSmoothAbs, Y, 3)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoCubicSmoothRel, X2, 0)
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IMPL_FLOAT_PROP(CurvetoCubicSmoothRel, Y2, 1)
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IMPL_FLOAT_PROP(CurvetoCubicSmoothRel, X, 2)
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IMPL_FLOAT_PROP(CurvetoCubicSmoothRel, Y, 3)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoQuadraticSmoothAbs, X, 0)
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IMPL_FLOAT_PROP(CurvetoQuadraticSmoothAbs, Y, 1)
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////////////////////////////////////////////////////////////////////////
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IMPL_FLOAT_PROP(CurvetoQuadraticSmoothRel, X, 0)
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IMPL_FLOAT_PROP(CurvetoQuadraticSmoothRel, Y, 1)
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// This must come after DOMSVGPathSegClosePath et. al. have been declared.
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/* static */ DOMSVGPathSeg*
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DOMSVGPathSeg::CreateFor(DOMSVGPathSegList *aList,
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uint32_t aListIndex,
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bool aIsAnimValItem)
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{
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uint32_t dataIndex = aList->mItems[aListIndex].mInternalDataIndex;
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float *data = &aList->InternalList().mData[dataIndex];
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uint32_t type = SVGPathSegUtils::DecodeType(data[0]);
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switch (type)
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{
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case PATHSEG_CLOSEPATH:
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return new DOMSVGPathSegClosePath(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_MOVETO_ABS:
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return new DOMSVGPathSegMovetoAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_MOVETO_REL:
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return new DOMSVGPathSegMovetoRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_LINETO_ABS:
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return new DOMSVGPathSegLinetoAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_LINETO_REL:
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return new DOMSVGPathSegLinetoRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_CUBIC_ABS:
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return new DOMSVGPathSegCurvetoCubicAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_CUBIC_REL:
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return new DOMSVGPathSegCurvetoCubicRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_QUADRATIC_ABS:
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return new DOMSVGPathSegCurvetoQuadraticAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_QUADRATIC_REL:
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return new DOMSVGPathSegCurvetoQuadraticRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_ARC_ABS:
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return new DOMSVGPathSegArcAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_ARC_REL:
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return new DOMSVGPathSegArcRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_LINETO_HORIZONTAL_ABS:
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return new DOMSVGPathSegLinetoHorizontalAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_LINETO_HORIZONTAL_REL:
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return new DOMSVGPathSegLinetoHorizontalRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_LINETO_VERTICAL_ABS:
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return new DOMSVGPathSegLinetoVerticalAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_LINETO_VERTICAL_REL:
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return new DOMSVGPathSegLinetoVerticalRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_CUBIC_SMOOTH_ABS:
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return new DOMSVGPathSegCurvetoCubicSmoothAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_CUBIC_SMOOTH_REL:
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return new DOMSVGPathSegCurvetoCubicSmoothRel(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS:
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return new DOMSVGPathSegCurvetoQuadraticSmoothAbs(aList, aListIndex, aIsAnimValItem);
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case PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL:
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return new DOMSVGPathSegCurvetoQuadraticSmoothRel(aList, aListIndex, aIsAnimValItem);
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default:
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NS_NOTREACHED("Invalid path segment type");
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return nullptr;
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}
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}
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} // namespace mozilla
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