diff options
Diffstat (limited to 'dom/html/HTMLTableElement.cpp')
| -rw-r--r-- | dom/html/HTMLTableElement.cpp | 1029 |
1 files changed, 1029 insertions, 0 deletions
diff --git a/dom/html/HTMLTableElement.cpp b/dom/html/HTMLTableElement.cpp new file mode 100644 index 0000000000..d6fc1573c2 --- /dev/null +++ b/dom/html/HTMLTableElement.cpp @@ -0,0 +1,1029 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/dom/HTMLTableElement.h" +#include "mozilla/MappedDeclarations.h" +#include "nsAttrValueInlines.h" +#include "nsHTMLStyleSheet.h" +#include "nsMappedAttributes.h" +#include "nsWrapperCacheInlines.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/HTMLCollectionBinding.h" +#include "mozilla/dom/HTMLTableElementBinding.h" +#include "nsContentUtils.h" +#include "jsfriendapi.h" + +NS_IMPL_NS_NEW_HTML_ELEMENT(Table) + +namespace mozilla::dom { + +/* ------------------------- TableRowsCollection --------------------------- */ +/** + * This class provides a late-bound collection of rows in a table. + * mParent is NOT ref-counted to avoid circular references + */ +class TableRowsCollection final : public nsIHTMLCollection, + public nsStubMutationObserver, + public nsWrapperCache { + public: + explicit TableRowsCollection(HTMLTableElement* aParent); + + NS_DECL_CYCLE_COLLECTING_ISUPPORTS + + NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED + NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED + NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED + NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED + + virtual uint32_t Length() override; + virtual Element* GetElementAt(uint32_t aIndex) override; + virtual nsINode* GetParentObject() override { return mParent; } + + virtual Element* GetFirstNamedElement(const nsAString& aName, + bool& aFound) override; + virtual void GetSupportedNames(nsTArray<nsString>& aNames) override; + + NS_IMETHOD ParentDestroyed(); + + NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS_AMBIGUOUS(TableRowsCollection, + nsIHTMLCollection) + + // nsWrapperCache + using nsWrapperCache::GetWrapperPreserveColor; + using nsWrapperCache::PreserveWrapper; + virtual JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + protected: + // Unregister ourselves as a mutation observer, and clear our internal state. + void CleanUp(); + void LastRelease() { CleanUp(); } + virtual ~TableRowsCollection() { + // we do NOT have a ref-counted reference to mParent, so do NOT + // release it! this is to avoid circular references. The + // instantiator who provided mParent is responsible for managing our + // reference for us. + CleanUp(); + } + + virtual JSObject* GetWrapperPreserveColorInternal() override { + return nsWrapperCache::GetWrapperPreserveColor(); + } + virtual void PreserveWrapperInternal( + nsISupports* aScriptObjectHolder) override { + nsWrapperCache::PreserveWrapper(aScriptObjectHolder); + } + + // Ensure that HTMLTableElement is in a valid state. This must be called + // before inspecting the mRows object. + void EnsureInitialized(); + + // Checks if the passed-in container is interesting for the purposes of + // invalidation due to a mutation observer. + bool InterestingContainer(nsIContent* aContainer); + + // Check if the passed-in nsIContent is a <tr> within the section defined by + // `aSection`. The root of the table is considered to be part of the `<tbody>` + // section. + bool IsAppropriateRow(nsAtom* aSection, nsIContent* aContent); + + // Scan backwards starting from `aCurrent` in the table, looking for the + // previous row in the table which is within the section `aSection`. + nsIContent* PreviousRow(nsAtom* aSection, nsIContent* aCurrent); + + // Handle the insertion of the child `aChild` into the container `aContainer` + // within the tree. The container must be an `InterestingContainer`. This + // method updates the mRows, mBodyStart, and mFootStart member variables. + // + // HandleInsert returns an integer which can be passed to the next call of the + // method in a loop inserting children into the same container. This will + // optimize subsequent insertions to require less work. This can either be -1, + // in which case we don't know where to insert the next row, and When passed + // to HandleInsert, it will use `PreviousRow` to locate the index to insert. + // Or, it can be an index to insert the next <tr> in the same container at. + int32_t HandleInsert(nsIContent* aContainer, nsIContent* aChild, + int32_t aIndexGuess = -1); + + // The HTMLTableElement which this TableRowsCollection tracks the rows for. + HTMLTableElement* mParent; + + // The current state of the TableRowsCollection. mBodyStart and mFootStart are + // indices into mRows which represent the location of the first row in the + // body or foot section. If there are no rows in a section, the index points + // at the location where the first element in that section would be inserted. + nsTArray<nsCOMPtr<nsIContent>> mRows; + uint32_t mBodyStart; + uint32_t mFootStart; + bool mInitialized; +}; + +TableRowsCollection::TableRowsCollection(HTMLTableElement* aParent) + : mParent(aParent), mBodyStart(0), mFootStart(0), mInitialized(false) { + MOZ_ASSERT(mParent); +} + +void TableRowsCollection::EnsureInitialized() { + if (mInitialized) { + return; + } + mInitialized = true; + + // Initialize mRows as the TableRowsCollection is created. The mutation + // observer should keep it up to date. + // + // It should be extremely unlikely that anyone creates a TableRowsCollection + // without calling a method on it, so lazily performing this initialization + // seems unnecessary. + AutoTArray<nsCOMPtr<nsIContent>, 32> body; + AutoTArray<nsCOMPtr<nsIContent>, 32> foot; + mRows.Clear(); + + auto addRowChildren = [&](nsTArray<nsCOMPtr<nsIContent>>& aArray, + nsIContent* aNode) { + for (nsIContent* inner = aNode->nsINode::GetFirstChild(); inner; + inner = inner->GetNextSibling()) { + if (inner->IsHTMLElement(nsGkAtoms::tr)) { + aArray.AppendElement(inner); + } + } + }; + + for (nsIContent* node = mParent->nsINode::GetFirstChild(); node; + node = node->GetNextSibling()) { + if (node->IsHTMLElement(nsGkAtoms::thead)) { + addRowChildren(mRows, node); + } else if (node->IsHTMLElement(nsGkAtoms::tbody)) { + addRowChildren(body, node); + } else if (node->IsHTMLElement(nsGkAtoms::tfoot)) { + addRowChildren(foot, node); + } else if (node->IsHTMLElement(nsGkAtoms::tr)) { + body.AppendElement(node); + } + } + + mBodyStart = mRows.Length(); + mRows.AppendElements(std::move(body)); + mFootStart = mRows.Length(); + mRows.AppendElements(std::move(foot)); + + mParent->AddMutationObserver(this); +} + +void TableRowsCollection::CleanUp() { + // Unregister ourselves as a mutation observer. + if (mInitialized && mParent) { + mParent->RemoveMutationObserver(this); + } + + // Clean up all of our internal state and make it empty in case someone looks + // at us. + mRows.Clear(); + mBodyStart = 0; + mFootStart = 0; + + // We set mInitialized to true in case someone still has a reference to us, as + // we don't need to try to initialize first. + mInitialized = true; + mParent = nullptr; +} + +JSObject* TableRowsCollection::WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return HTMLCollection_Binding::Wrap(aCx, this, aGivenProto); +} + +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(TableRowsCollection, mRows) +NS_IMPL_CYCLE_COLLECTING_ADDREF(TableRowsCollection) +NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(TableRowsCollection, + LastRelease()) + +NS_INTERFACE_TABLE_HEAD(TableRowsCollection) + NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY + NS_INTERFACE_TABLE(TableRowsCollection, nsIHTMLCollection, + nsIMutationObserver) + NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(TableRowsCollection) +NS_INTERFACE_MAP_END + +uint32_t TableRowsCollection::Length() { + EnsureInitialized(); + return mRows.Length(); +} + +Element* TableRowsCollection::GetElementAt(uint32_t aIndex) { + EnsureInitialized(); + if (aIndex < mRows.Length()) { + return mRows[aIndex]->AsElement(); + } + return nullptr; +} + +Element* TableRowsCollection::GetFirstNamedElement(const nsAString& aName, + bool& aFound) { + EnsureInitialized(); + aFound = false; + RefPtr<nsAtom> nameAtom = NS_Atomize(aName); + NS_ENSURE_TRUE(nameAtom, nullptr); + + for (auto& node : mRows) { + if (node->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::name, + nameAtom, eCaseMatters) || + node->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::id, + nameAtom, eCaseMatters)) { + aFound = true; + return node->AsElement(); + } + } + + return nullptr; +} + +void TableRowsCollection::GetSupportedNames(nsTArray<nsString>& aNames) { + EnsureInitialized(); + for (auto& node : mRows) { + if (node->HasID()) { + nsAtom* idAtom = node->GetID(); + MOZ_ASSERT(idAtom != nsGkAtoms::_empty, "Empty ids don't get atomized"); + nsDependentAtomString idStr(idAtom); + if (!aNames.Contains(idStr)) { + aNames.AppendElement(idStr); + } + } + + nsGenericHTMLElement* el = nsGenericHTMLElement::FromNode(node); + if (el) { + const nsAttrValue* val = el->GetParsedAttr(nsGkAtoms::name); + if (val && val->Type() == nsAttrValue::eAtom) { + nsAtom* nameAtom = val->GetAtomValue(); + MOZ_ASSERT(nameAtom != nsGkAtoms::_empty, + "Empty names don't get atomized"); + nsDependentAtomString nameStr(nameAtom); + if (!aNames.Contains(nameStr)) { + aNames.AppendElement(nameStr); + } + } + } + } +} + +NS_IMETHODIMP +TableRowsCollection::ParentDestroyed() { + CleanUp(); + return NS_OK; +} + +bool TableRowsCollection::InterestingContainer(nsIContent* aContainer) { + return mParent && aContainer && + (aContainer == mParent || + (aContainer->GetParent() == mParent && + aContainer->IsAnyOfHTMLElements(nsGkAtoms::thead, nsGkAtoms::tbody, + nsGkAtoms::tfoot))); +} + +bool TableRowsCollection::IsAppropriateRow(nsAtom* aSection, + nsIContent* aContent) { + if (!aContent->IsHTMLElement(nsGkAtoms::tr)) { + return false; + } + // If it's in the root, then we consider it to be in a tbody. + nsIContent* parent = aContent->GetParent(); + if (aSection == nsGkAtoms::tbody && parent == mParent) { + return true; + } + return parent->IsHTMLElement(aSection); +} + +nsIContent* TableRowsCollection::PreviousRow(nsAtom* aSection, + nsIContent* aCurrent) { + // Keep going backwards until we've found a `tr` element. We want to always + // run at least once, as we don't want to find ourselves. + // + // Each spin of the loop we step backwards one element. If we're at the top of + // a section, we step out of it into the root, and if we step onto a section + // matching `aSection`, we step into it. We keep spinning the loop until + // either we reach the first element in mParent, or find a <tr> in an + // appropriate section. + nsIContent* prev = aCurrent; + do { + nsIContent* parent = prev->GetParent(); + prev = prev->GetPreviousSibling(); + + // Ascend out of any sections we're currently in, if we've run out of + // elements. + if (!prev && parent != mParent) { + prev = parent->GetPreviousSibling(); + } + + // Descend into a section if we stepped onto one. + if (prev && prev->GetParent() == mParent && prev->IsHTMLElement(aSection)) { + prev = prev->GetLastChild(); + } + } while (prev && !IsAppropriateRow(aSection, prev)); + return prev; +} + +int32_t TableRowsCollection::HandleInsert(nsIContent* aContainer, + nsIContent* aChild, + int32_t aIndexGuess) { + if (!nsContentUtils::IsInSameAnonymousTree(mParent, aChild)) { + return aIndexGuess; // Nothing inserted, guess hasn't changed. + } + + // If we're adding a section to the root, add each of the rows in that section + // individually. + if (aContainer == mParent && + aChild->IsAnyOfHTMLElements(nsGkAtoms::thead, nsGkAtoms::tbody, + nsGkAtoms::tfoot)) { + // If we're entering a tbody, we can persist the index guess we were passed, + // as the newly added items are in the same section as us, however, if we're + // entering thead or tfoot we will have to re-scan. + bool isTBody = aChild->IsHTMLElement(nsGkAtoms::tbody); + int32_t indexGuess = isTBody ? aIndexGuess : -1; + + for (nsIContent* inner = aChild->GetFirstChild(); inner; + inner = inner->GetNextSibling()) { + indexGuess = HandleInsert(aChild, inner, indexGuess); + } + + return isTBody ? indexGuess : -1; + } + if (!aChild->IsHTMLElement(nsGkAtoms::tr)) { + return aIndexGuess; // Nothing inserted, guess hasn't changed. + } + + // We should have only been passed an insertion from an interesting container, + // so we can get the container we're inserting to fairly easily. + nsAtom* section = aContainer == mParent ? nsGkAtoms::tbody + : aContainer->NodeInfo()->NameAtom(); + + // Determine the default index we would to insert after if we don't find any + // previous row, and offset our section boundaries based on the section we're + // planning to insert into. + size_t index = 0; + if (section == nsGkAtoms::thead) { + mBodyStart++; + mFootStart++; + } else if (section == nsGkAtoms::tbody) { + index = mBodyStart; + mFootStart++; + } else if (section == nsGkAtoms::tfoot) { + index = mFootStart; + } else { + MOZ_ASSERT(false, "section should be one of thead, tbody, or tfoot"); + } + + // If we already have an index guess, we can skip scanning for the previous + // row. + if (aIndexGuess >= 0) { + index = aIndexGuess; + } else { + // Find the previous row in the section we're inserting into. If we find it, + // we can use it to override our insertion index. We don't need to modify + // mBodyStart or mFootStart anymore, as they have already been correctly + // updated based only on section. + nsIContent* insertAfter = PreviousRow(section, aChild); + if (insertAfter) { + // NOTE: We want to ensure that appending elements is quick, so we search + // from the end rather than from the beginning. + index = mRows.LastIndexOf(insertAfter) + 1; + MOZ_ASSERT(index != nsTArray<nsCOMPtr<nsIContent>>::NoIndex); + } + } + +#ifdef DEBUG + // Assert that we're inserting into the correct section. + if (section == nsGkAtoms::thead) { + MOZ_ASSERT(index < mBodyStart); + } else if (section == nsGkAtoms::tbody) { + MOZ_ASSERT(index >= mBodyStart); + MOZ_ASSERT(index < mFootStart); + } else if (section == nsGkAtoms::tfoot) { + MOZ_ASSERT(index >= mFootStart); + MOZ_ASSERT(index <= mRows.Length()); + } + + MOZ_ASSERT(mBodyStart <= mFootStart); + MOZ_ASSERT(mFootStart <= mRows.Length() + 1); +#endif + + mRows.InsertElementAt(index, aChild); + return index + 1; +} + +// nsIMutationObserver + +void TableRowsCollection::ContentAppended(nsIContent* aFirstNewContent) { + nsIContent* container = aFirstNewContent->GetParent(); + if (!nsContentUtils::IsInSameAnonymousTree(mParent, aFirstNewContent) || + !InterestingContainer(container)) { + return; + } + + // We usually can't guess where we need to start inserting, unless we're + // appending into mParent, in which case we can provide the guess that we + // should insert at the end of the body, which can help us avoid potentially + // expensive work in the common case. + int32_t indexGuess = mParent == container ? mFootStart : -1; + + // Insert each of the newly added content one at a time. The indexGuess should + // make insertions of a large number of elements cheaper. + for (nsIContent* content = aFirstNewContent; content; + content = content->GetNextSibling()) { + indexGuess = HandleInsert(container, content, indexGuess); + } +} + +void TableRowsCollection::ContentInserted(nsIContent* aChild) { + if (!nsContentUtils::IsInSameAnonymousTree(mParent, aChild) || + !InterestingContainer(aChild->GetParent())) { + return; + } + + HandleInsert(aChild->GetParent(), aChild); +} + +void TableRowsCollection::ContentRemoved(nsIContent* aChild, + nsIContent* aPreviousSibling) { + if (!nsContentUtils::IsInSameAnonymousTree(mParent, aChild) || + !InterestingContainer(aChild->GetParent())) { + return; + } + + // If the element being removed is a `tr`, we can just remove it from our + // list. It shouldn't change the order of anything. + if (aChild->IsHTMLElement(nsGkAtoms::tr)) { + size_t index = mRows.IndexOf(aChild); + if (index != nsTArray<nsCOMPtr<nsIContent>>::NoIndex) { + mRows.RemoveElementAt(index); + if (mBodyStart > index) { + mBodyStart--; + } + if (mFootStart > index) { + mFootStart--; + } + } + return; + } + + // If the element being removed is a `thead`, `tbody`, or `tfoot`, we can + // remove any `tr`s in our list which have that element as its parent node. In + // any other situation, the removal won't affect us, so we can ignore it. + if (!aChild->IsAnyOfHTMLElements(nsGkAtoms::thead, nsGkAtoms::tbody, + nsGkAtoms::tfoot)) { + return; + } + + size_t beforeLength = mRows.Length(); + mRows.RemoveElementsBy( + [&](nsIContent* element) { return element->GetParent() == aChild; }); + size_t removed = beforeLength - mRows.Length(); + if (aChild->IsHTMLElement(nsGkAtoms::thead)) { + // NOTE: Need to move both tbody and tfoot, as we removed from head. + mBodyStart -= removed; + mFootStart -= removed; + } else if (aChild->IsHTMLElement(nsGkAtoms::tbody)) { + // NOTE: Need to move tfoot, as we removed from body. + mFootStart -= removed; + } +} + +void TableRowsCollection::NodeWillBeDestroyed(nsINode* aNode) { + // Set mInitialized to false so CleanUp doesn't try to remove our mutation + // observer, as we're going away. CleanUp() will reset mInitialized to true as + // it returns. + mInitialized = false; + CleanUp(); +} + +/* --------------------------- HTMLTableElement ---------------------------- */ + +HTMLTableElement::HTMLTableElement( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo) + : nsGenericHTMLElement(std::move(aNodeInfo)), + mTableInheritedAttributes(nullptr) { + SetHasWeirdParserInsertionMode(); +} + +HTMLTableElement::~HTMLTableElement() { + if (mRows) { + mRows->ParentDestroyed(); + } + ReleaseInheritedAttributes(); +} + +JSObject* HTMLTableElement::WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return HTMLTableElement_Binding::Wrap(aCx, this, aGivenProto); +} + +NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLTableElement) + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLTableElement, + nsGenericHTMLElement) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mTBodies) + if (tmp->mRows) { + tmp->mRows->ParentDestroyed(); + } + NS_IMPL_CYCLE_COLLECTION_UNLINK(mRows) +NS_IMPL_CYCLE_COLLECTION_UNLINK_END +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLTableElement, + nsGenericHTMLElement) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTBodies) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRows) +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLTableElement, + nsGenericHTMLElement) + +NS_IMPL_ELEMENT_CLONE(HTMLTableElement) + +// the DOM spec says border, cellpadding, cellSpacing are all "wstring" +// in fact, they are integers or they are meaningless. so we store them +// here as ints. + +nsIHTMLCollection* HTMLTableElement::Rows() { + if (!mRows) { + mRows = new TableRowsCollection(this); + } + + return mRows; +} + +nsIHTMLCollection* HTMLTableElement::TBodies() { + if (!mTBodies) { + // Not using NS_GetContentList because this should not be cached + mTBodies = new nsContentList(this, kNameSpaceID_XHTML, nsGkAtoms::tbody, + nsGkAtoms::tbody, false); + } + + return mTBodies; +} + +already_AddRefed<nsGenericHTMLElement> HTMLTableElement::CreateTHead() { + RefPtr<nsGenericHTMLElement> head = GetTHead(); + if (!head) { + // Create a new head rowgroup. + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nsContentUtils::QNameChanged(mNodeInfo, nsGkAtoms::thead, + getter_AddRefs(nodeInfo)); + + head = NS_NewHTMLTableSectionElement(nodeInfo.forget()); + if (!head) { + return nullptr; + } + + nsCOMPtr<nsIContent> refNode = nullptr; + for (refNode = nsINode::GetFirstChild(); refNode; + refNode = refNode->GetNextSibling()) { + if (refNode->IsHTMLElement() && + !refNode->IsHTMLElement(nsGkAtoms::caption) && + !refNode->IsHTMLElement(nsGkAtoms::colgroup)) { + break; + } + } + + nsINode::InsertBefore(*head, refNode, IgnoreErrors()); + } + return head.forget(); +} + +void HTMLTableElement::DeleteTHead() { + RefPtr<HTMLTableSectionElement> tHead = GetTHead(); + if (tHead) { + mozilla::IgnoredErrorResult rv; + nsINode::RemoveChild(*tHead, rv); + } +} + +already_AddRefed<nsGenericHTMLElement> HTMLTableElement::CreateTFoot() { + RefPtr<nsGenericHTMLElement> foot = GetTFoot(); + if (!foot) { + // create a new foot rowgroup + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nsContentUtils::QNameChanged(mNodeInfo, nsGkAtoms::tfoot, + getter_AddRefs(nodeInfo)); + + foot = NS_NewHTMLTableSectionElement(nodeInfo.forget()); + if (!foot) { + return nullptr; + } + AppendChildTo(foot, true, IgnoreErrors()); + } + + return foot.forget(); +} + +void HTMLTableElement::DeleteTFoot() { + RefPtr<HTMLTableSectionElement> tFoot = GetTFoot(); + if (tFoot) { + mozilla::IgnoredErrorResult rv; + nsINode::RemoveChild(*tFoot, rv); + } +} + +already_AddRefed<nsGenericHTMLElement> HTMLTableElement::CreateCaption() { + RefPtr<nsGenericHTMLElement> caption = GetCaption(); + if (!caption) { + // Create a new caption. + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nsContentUtils::QNameChanged(mNodeInfo, nsGkAtoms::caption, + getter_AddRefs(nodeInfo)); + + caption = NS_NewHTMLTableCaptionElement(nodeInfo.forget()); + if (!caption) { + return nullptr; + } + + nsCOMPtr<nsINode> firsChild = nsINode::GetFirstChild(); + nsINode::InsertBefore(*caption, firsChild, IgnoreErrors()); + } + return caption.forget(); +} + +void HTMLTableElement::DeleteCaption() { + RefPtr<HTMLTableCaptionElement> caption = GetCaption(); + if (caption) { + mozilla::IgnoredErrorResult rv; + nsINode::RemoveChild(*caption, rv); + } +} + +already_AddRefed<nsGenericHTMLElement> HTMLTableElement::CreateTBody() { + RefPtr<mozilla::dom::NodeInfo> nodeInfo = + OwnerDoc()->NodeInfoManager()->GetNodeInfo( + nsGkAtoms::tbody, nullptr, kNameSpaceID_XHTML, ELEMENT_NODE); + MOZ_ASSERT(nodeInfo); + + RefPtr<nsGenericHTMLElement> newBody = + NS_NewHTMLTableSectionElement(nodeInfo.forget()); + MOZ_ASSERT(newBody); + + nsCOMPtr<nsIContent> referenceNode = nullptr; + for (nsIContent* child = nsINode::GetLastChild(); child; + child = child->GetPreviousSibling()) { + if (child->IsHTMLElement(nsGkAtoms::tbody)) { + referenceNode = child->GetNextSibling(); + break; + } + } + + nsINode::InsertBefore(*newBody, referenceNode, IgnoreErrors()); + + return newBody.forget(); +} + +already_AddRefed<nsGenericHTMLElement> HTMLTableElement::InsertRow( + int32_t aIndex, ErrorResult& aError) { + /* get the ref row at aIndex + if there is one, + get its parent + insert the new row just before the ref row + else + get the first row group + insert the new row as its first child + */ + if (aIndex < -1) { + aError.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); + return nullptr; + } + + nsIHTMLCollection* rows = Rows(); + uint32_t rowCount = rows->Length(); + if ((uint32_t)aIndex > rowCount && aIndex != -1) { + aError.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); + return nullptr; + } + + // use local variable refIndex so we can remember original aIndex + uint32_t refIndex = (uint32_t)aIndex; + + RefPtr<nsGenericHTMLElement> newRow; + if (rowCount > 0) { + if (refIndex == rowCount || aIndex == -1) { + // we set refIndex to the last row so we can get the last row's + // parent we then do an AppendChild below if (rowCount<aIndex) + + refIndex = rowCount - 1; + } + + RefPtr<Element> refRow = rows->Item(refIndex); + nsCOMPtr<nsINode> parent = refRow->GetParentNode(); + + // create the row + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nsContentUtils::QNameChanged(mNodeInfo, nsGkAtoms::tr, + getter_AddRefs(nodeInfo)); + + newRow = NS_NewHTMLTableRowElement(nodeInfo.forget()); + + if (newRow) { + // If aIndex is -1 or equal to the number of rows, the new row + // is appended. + if (aIndex == -1 || uint32_t(aIndex) == rowCount) { + parent->AppendChild(*newRow, aError); + } else { + // insert the new row before the reference row we found above + parent->InsertBefore(*newRow, refRow, aError); + } + + if (aError.Failed()) { + return nullptr; + } + } + } else { + // the row count was 0, so + // find the last row group and insert there as first child + nsCOMPtr<nsIContent> rowGroup; + for (nsIContent* child = nsINode::GetLastChild(); child; + child = child->GetPreviousSibling()) { + if (child->IsHTMLElement(nsGkAtoms::tbody)) { + rowGroup = child; + break; + } + } + + if (!rowGroup) { // need to create a TBODY + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nsContentUtils::QNameChanged(mNodeInfo, nsGkAtoms::tbody, + getter_AddRefs(nodeInfo)); + + rowGroup = NS_NewHTMLTableSectionElement(nodeInfo.forget()); + if (rowGroup) { + AppendChildTo(rowGroup, true, aError); + if (aError.Failed()) { + return nullptr; + } + } + } + + if (rowGroup) { + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nsContentUtils::QNameChanged(mNodeInfo, nsGkAtoms::tr, + getter_AddRefs(nodeInfo)); + + newRow = NS_NewHTMLTableRowElement(nodeInfo.forget()); + if (newRow) { + HTMLTableSectionElement* section = + static_cast<HTMLTableSectionElement*>(rowGroup.get()); + nsIHTMLCollection* rows = section->Rows(); + nsCOMPtr<nsINode> refNode = rows->Item(0); + rowGroup->InsertBefore(*newRow, refNode, aError); + } + } + } + + return newRow.forget(); +} + +void HTMLTableElement::DeleteRow(int32_t aIndex, ErrorResult& aError) { + if (aIndex < -1) { + aError.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); + return; + } + + nsIHTMLCollection* rows = Rows(); + uint32_t refIndex; + if (aIndex == -1) { + refIndex = rows->Length(); + if (refIndex == 0) { + return; + } + + --refIndex; + } else { + refIndex = (uint32_t)aIndex; + } + + nsCOMPtr<nsIContent> row = rows->Item(refIndex); + if (!row) { + aError.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); + return; + } + + row->RemoveFromParent(); +} + +bool HTMLTableElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute, + const nsAString& aValue, + nsIPrincipal* aMaybeScriptedPrincipal, + nsAttrValue& aResult) { + /* ignore summary, just a string */ + if (aNamespaceID == kNameSpaceID_None) { + if (aAttribute == nsGkAtoms::cellspacing || + aAttribute == nsGkAtoms::cellpadding || + aAttribute == nsGkAtoms::border) { + return aResult.ParseNonNegativeIntValue(aValue); + } + if (aAttribute == nsGkAtoms::height) { + // Purposeful spec violation (spec says to use ParseNonzeroHTMLDimension) + // to stay compatible with our old behavior and other browsers. See + // https://github.com/whatwg/html/issues/4715 + return aResult.ParseHTMLDimension(aValue); + } + if (aAttribute == nsGkAtoms::width) { + return aResult.ParseNonzeroHTMLDimension(aValue); + } + + if (aAttribute == nsGkAtoms::align) { + return ParseTableHAlignValue(aValue, aResult); + } + if (aAttribute == nsGkAtoms::bgcolor || + aAttribute == nsGkAtoms::bordercolor) { + return aResult.ParseColor(aValue); + } + } + + return nsGenericHTMLElement::ParseBackgroundAttribute( + aNamespaceID, aAttribute, aValue, aResult) || + nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue, + aMaybeScriptedPrincipal, aResult); +} + +void HTMLTableElement::MapAttributesIntoRule( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + // XXX Bug 211636: This function is used by a single style rule + // that's used to match two different type of elements -- tables, and + // table cells. (nsHTMLTableCellElement overrides + // WalkContentStyleRules so that this happens.) This violates the + // nsIStyleRule contract, since it's the same style rule object doing + // the mapping in two different ways. It's also incorrect since it's + // testing the display type of the ComputedStyle rather than checking + // which *element* it's matching (style rules should not stop matching + // when the display type is changed). + + // cellspacing + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::cellspacing); + if (value && value->Type() == nsAttrValue::eInteger && + !aDecls.PropertyIsSet(eCSSProperty_border_spacing)) { + aDecls.SetPixelValue(eCSSProperty_border_spacing, + float(value->GetIntegerValue())); + } + // align; Check for enumerated type (it may be another type if + // illegal) + value = aAttributes->GetAttr(nsGkAtoms::align); + if (value && value->Type() == nsAttrValue::eEnum) { + if (value->GetEnumValue() == uint8_t(StyleTextAlign::Center) || + value->GetEnumValue() == uint8_t(StyleTextAlign::MozCenter)) { + aDecls.SetAutoValueIfUnset(eCSSProperty_margin_left); + aDecls.SetAutoValueIfUnset(eCSSProperty_margin_right); + } + } + + // bordercolor + value = aAttributes->GetAttr(nsGkAtoms::bordercolor); + nscolor color; + if (value && value->GetColorValue(color)) { + aDecls.SetColorValueIfUnset(eCSSProperty_border_top_color, color); + aDecls.SetColorValueIfUnset(eCSSProperty_border_left_color, color); + aDecls.SetColorValueIfUnset(eCSSProperty_border_bottom_color, color); + aDecls.SetColorValueIfUnset(eCSSProperty_border_right_color, color); + } + + // border + const nsAttrValue* borderValue = aAttributes->GetAttr(nsGkAtoms::border); + if (borderValue) { + // border = 1 pixel default + int32_t borderThickness = 1; + + if (borderValue->Type() == nsAttrValue::eInteger) + borderThickness = borderValue->GetIntegerValue(); + + // by default, set all border sides to the specified width + aDecls.SetPixelValueIfUnset(eCSSProperty_border_top_width, + (float)borderThickness); + aDecls.SetPixelValueIfUnset(eCSSProperty_border_left_width, + (float)borderThickness); + aDecls.SetPixelValueIfUnset(eCSSProperty_border_bottom_width, + (float)borderThickness); + aDecls.SetPixelValueIfUnset(eCSSProperty_border_right_width, + (float)borderThickness); + } + + nsGenericHTMLElement::MapImageSizeAttributesInto(aAttributes, aDecls); + nsGenericHTMLElement::MapBackgroundAttributesInto(aAttributes, aDecls); + nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aDecls); +} + +NS_IMETHODIMP_(bool) +HTMLTableElement::IsAttributeMapped(const nsAtom* aAttribute) const { + static const MappedAttributeEntry attributes[] = { + {nsGkAtoms::cellpadding}, {nsGkAtoms::cellspacing}, + {nsGkAtoms::border}, {nsGkAtoms::width}, + {nsGkAtoms::height}, + + {nsGkAtoms::bordercolor}, + + {nsGkAtoms::align}, {nullptr}}; + + static const MappedAttributeEntry* const map[] = { + attributes, + sCommonAttributeMap, + sBackgroundAttributeMap, + }; + + return FindAttributeDependence(aAttribute, map); +} + +nsMapRuleToAttributesFunc HTMLTableElement::GetAttributeMappingFunction() + const { + return &MapAttributesIntoRule; +} + +static void MapInheritedTableAttributesIntoRule( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::cellpadding); + if (value && value->Type() == nsAttrValue::eInteger) { + // We have cellpadding. This will override our padding values if we + // don't have any set. + float pad = float(value->GetIntegerValue()); + + aDecls.SetPixelValueIfUnset(eCSSProperty_padding_top, pad); + aDecls.SetPixelValueIfUnset(eCSSProperty_padding_right, pad); + aDecls.SetPixelValueIfUnset(eCSSProperty_padding_bottom, pad); + aDecls.SetPixelValueIfUnset(eCSSProperty_padding_left, pad); + } +} + +nsMappedAttributes* HTMLTableElement::GetAttributesMappedForCell() { + return mTableInheritedAttributes; +} + +void HTMLTableElement::BuildInheritedAttributes() { + NS_ASSERTION(!mTableInheritedAttributes, + "potential leak, plus waste of work"); + MOZ_ASSERT(NS_IsMainThread()); + Document* document = GetComposedDoc(); + nsHTMLStyleSheet* sheet = + document ? document->GetAttributeStyleSheet() : nullptr; + RefPtr<nsMappedAttributes> newAttrs; + if (sheet) { + const nsAttrValue* value = mAttrs.GetAttr(nsGkAtoms::cellpadding); + if (value) { + RefPtr<nsMappedAttributes> modifiableMapped = + new nsMappedAttributes(sheet, MapInheritedTableAttributesIntoRule); + + if (modifiableMapped) { + nsAttrValue val(*value); + bool oldValueSet; + modifiableMapped->SetAndSwapAttr(nsGkAtoms::cellpadding, val, + &oldValueSet); + } + newAttrs = sheet->UniqueMappedAttributes(modifiableMapped); + NS_ASSERTION(newAttrs, "out of memory, but handling gracefully"); + + if (newAttrs != modifiableMapped) { + // Reset the stylesheet of modifiableMapped so that it doesn't + // spend time trying to remove itself from the hash. There is no + // risk that modifiableMapped is in the hash since we created + // it ourselves and it didn't come from the stylesheet (in which + // case it would not have been modifiable). + modifiableMapped->DropStyleSheetReference(); + } + } + mTableInheritedAttributes = newAttrs; + NS_IF_ADDREF(mTableInheritedAttributes); + } +} + +void HTMLTableElement::ReleaseInheritedAttributes() { + NS_IF_RELEASE(mTableInheritedAttributes); +} + +nsresult HTMLTableElement::BindToTree(BindContext& aContext, nsINode& aParent) { + ReleaseInheritedAttributes(); + nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent); + NS_ENSURE_SUCCESS(rv, rv); + BuildInheritedAttributes(); + return NS_OK; +} + +void HTMLTableElement::UnbindFromTree(bool aNullParent) { + ReleaseInheritedAttributes(); + nsGenericHTMLElement::UnbindFromTree(aNullParent); +} + +nsresult HTMLTableElement::BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName, + const nsAttrValueOrString* aValue, + bool aNotify) { + if (aName == nsGkAtoms::cellpadding && aNameSpaceID == kNameSpaceID_None) { + ReleaseInheritedAttributes(); + } + return nsGenericHTMLElement::BeforeSetAttr(aNameSpaceID, aName, aValue, + aNotify); +} + +nsresult HTMLTableElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName, + const nsAttrValue* aValue, + const nsAttrValue* aOldValue, + nsIPrincipal* aSubjectPrincipal, + bool aNotify) { + if (aName == nsGkAtoms::cellpadding && aNameSpaceID == kNameSpaceID_None) { + BuildInheritedAttributes(); + } + return nsGenericHTMLElement::AfterSetAttr( + aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify); +} + +} // namespace mozilla::dom |