298 lines
9.1 KiB
C++
298 lines
9.1 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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/*
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* Implementation of DOM Core's nsIDOMText node.
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*/
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#include "nsTextNode.h"
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#include "mozilla/dom/TextBinding.h"
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#include "nsContentUtils.h"
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#include "mozilla/dom/DirectionalityUtils.h"
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#include "nsIDOMEventListener.h"
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#include "nsIDOMMutationEvent.h"
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#include "nsIDocument.h"
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#include "nsThreadUtils.h"
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#include "nsStubMutationObserver.h"
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#include "mozilla/IntegerPrintfMacros.h"
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#ifdef DEBUG
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#include "nsRange.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::dom;
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/**
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* class used to implement attr() generated content
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*/
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class nsAttributeTextNode final : public nsTextNode,
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public nsStubMutationObserver
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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nsAttributeTextNode(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
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int32_t aNameSpaceID,
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nsIAtom* aAttrName) :
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nsTextNode(aNodeInfo),
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mGrandparent(nullptr),
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mNameSpaceID(aNameSpaceID),
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mAttrName(aAttrName)
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{
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NS_ASSERTION(mNameSpaceID != kNameSpaceID_Unknown, "Must know namespace");
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NS_ASSERTION(mAttrName, "Must have attr name");
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}
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virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers) override;
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virtual void UnbindFromTree(bool aDeep = true,
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bool aNullParent = true) override;
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NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
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NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
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virtual nsGenericDOMDataNode *CloneDataNode(mozilla::dom::NodeInfo *aNodeInfo,
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bool aCloneText) const override
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{
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already_AddRefed<mozilla::dom::NodeInfo> ni =
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RefPtr<mozilla::dom::NodeInfo>(aNodeInfo).forget();
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nsAttributeTextNode *it = new nsAttributeTextNode(ni,
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mNameSpaceID,
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mAttrName);
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if (it && aCloneText) {
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it->mText = mText;
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}
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return it;
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}
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// Public method for the event to run
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void UpdateText() {
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UpdateText(true);
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}
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private:
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virtual ~nsAttributeTextNode() {
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NS_ASSERTION(!mGrandparent, "We were not unbound!");
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}
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// Update our text to our parent's current attr value
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void UpdateText(bool aNotify);
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// This doesn't need to be a strong pointer because it's only non-null
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// while we're bound to the document tree, and it points to an ancestor
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// so the ancestor must be bound to the document tree the whole time
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// and can't be deleted.
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nsIContent* mGrandparent;
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// What attribute we're showing
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int32_t mNameSpaceID;
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nsCOMPtr<nsIAtom> mAttrName;
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};
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nsTextNode::~nsTextNode()
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{
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}
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NS_IMPL_ISUPPORTS_INHERITED(nsTextNode, nsGenericDOMDataNode, nsIDOMNode,
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nsIDOMText, nsIDOMCharacterData)
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JSObject*
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nsTextNode::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return TextBinding::Wrap(aCx, this, aGivenProto);
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}
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bool
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nsTextNode::IsNodeOfType(uint32_t aFlags) const
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{
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return !(aFlags & ~(eCONTENT | eTEXT | eDATA_NODE));
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}
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nsGenericDOMDataNode*
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nsTextNode::CloneDataNode(mozilla::dom::NodeInfo *aNodeInfo, bool aCloneText) const
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{
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already_AddRefed<mozilla::dom::NodeInfo> ni = RefPtr<mozilla::dom::NodeInfo>(aNodeInfo).forget();
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nsTextNode *it = new nsTextNode(ni);
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if (aCloneText) {
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it->mText = mText;
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}
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return it;
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}
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nsresult
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nsTextNode::AppendTextForNormalize(const char16_t* aBuffer, uint32_t aLength,
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bool aNotify, nsIContent* aNextSibling)
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{
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CharacterDataChangeInfo::Details details = {
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CharacterDataChangeInfo::Details::eMerge, aNextSibling
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};
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return SetTextInternal(mText.GetLength(), 0, aBuffer, aLength, aNotify, &details);
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}
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nsresult
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nsTextNode::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent, bool aCompileEventHandlers)
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{
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nsresult rv = nsGenericDOMDataNode::BindToTree(aDocument, aParent,
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aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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SetDirectionFromNewTextNode(this);
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return NS_OK;
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}
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void nsTextNode::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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ResetDirectionSetByTextNode(this);
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nsGenericDOMDataNode::UnbindFromTree(aDeep, aNullParent);
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}
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#ifdef DEBUG
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void
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nsTextNode::List(FILE* out, int32_t aIndent) const
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{
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int32_t index;
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for (index = aIndent; --index >= 0; ) fputs(" ", out);
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fprintf(out, "Text@%p", static_cast<const void*>(this));
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fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags()));
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if (IsCommonAncestorForRangeInSelection()) {
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typedef nsTHashtable<nsPtrHashKey<nsRange> > RangeHashTable;
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RangeHashTable* ranges =
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static_cast<RangeHashTable*>(GetProperty(nsGkAtoms::range));
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fprintf(out, " ranges:%d", ranges ? ranges->Count() : 0);
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}
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fprintf(out, " primaryframe=%p", static_cast<void*>(GetPrimaryFrame()));
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fprintf(out, " refcount=%" PRIuPTR "<", mRefCnt.get());
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nsAutoString tmp;
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ToCString(tmp, 0, mText.GetLength());
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fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
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fputs(">\n", out);
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}
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void
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nsTextNode::DumpContent(FILE* out, int32_t aIndent, bool aDumpAll) const
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{
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if(aDumpAll) {
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int32_t index;
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for (index = aIndent; --index >= 0; ) fputs(" ", out);
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nsAutoString tmp;
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ToCString(tmp, 0, mText.GetLength());
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if(!tmp.EqualsLiteral("\\n")) {
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fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
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if(aIndent) fputs("\n", out);
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}
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}
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}
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#endif
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nsresult
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NS_NewAttributeContent(nsNodeInfoManager *aNodeInfoManager,
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int32_t aNameSpaceID, nsIAtom* aAttrName,
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nsIContent** aResult)
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{
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NS_PRECONDITION(aNodeInfoManager, "Missing nodeInfoManager");
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NS_PRECONDITION(aAttrName, "Must have an attr name");
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NS_PRECONDITION(aNameSpaceID != kNameSpaceID_Unknown, "Must know namespace");
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*aResult = nullptr;
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already_AddRefed<mozilla::dom::NodeInfo> ni = aNodeInfoManager->GetTextNodeInfo();
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nsAttributeTextNode* textNode = new nsAttributeTextNode(ni,
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aNameSpaceID,
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aAttrName);
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NS_ADDREF(*aResult = textNode);
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return NS_OK;
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}
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NS_IMPL_ISUPPORTS_INHERITED(nsAttributeTextNode, nsTextNode,
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nsIMutationObserver)
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nsresult
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nsAttributeTextNode::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers)
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{
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NS_PRECONDITION(aParent && aParent->GetParent(),
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"This node can't be a child of the document or of the document root");
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nsresult rv = nsTextNode::BindToTree(aDocument, aParent,
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aBindingParent, aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ASSERTION(!mGrandparent, "We were already bound!");
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mGrandparent = aParent->GetParent();
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mGrandparent->AddMutationObserver(this);
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// Note that there is no need to notify here, since we have no
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// frame yet at this point.
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UpdateText(false);
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return NS_OK;
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}
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void
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nsAttributeTextNode::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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// UnbindFromTree can be called anytime so we have to be safe.
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if (mGrandparent) {
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// aNullParent might not be true here, but we want to remove the
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// mutation observer anyway since we only need it while we're
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// in the document.
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mGrandparent->RemoveMutationObserver(this);
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mGrandparent = nullptr;
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}
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nsTextNode::UnbindFromTree(aDeep, aNullParent);
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}
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void
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nsAttributeTextNode::AttributeChanged(nsIDocument* aDocument,
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Element* aElement,
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int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType,
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const nsAttrValue* aOldValue)
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{
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if (aNameSpaceID == mNameSpaceID && aAttribute == mAttrName &&
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aElement == mGrandparent) {
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// Since UpdateText notifies, do it when it's safe to run script. Note
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// that if we get unbound while the event is up that's ok -- we'll just
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// have no grandparent when it fires, and will do nothing.
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void (nsAttributeTextNode::*update)() = &nsAttributeTextNode::UpdateText;
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nsCOMPtr<nsIRunnable> ev = NS_NewRunnableMethod(this, update);
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nsContentUtils::AddScriptRunner(ev);
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}
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}
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void
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nsAttributeTextNode::NodeWillBeDestroyed(const nsINode* aNode)
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{
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NS_ASSERTION(aNode == static_cast<nsINode*>(mGrandparent), "Wrong node!");
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mGrandparent = nullptr;
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}
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void
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nsAttributeTextNode::UpdateText(bool aNotify)
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{
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if (mGrandparent) {
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nsAutoString attrValue;
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mGrandparent->GetAttr(mNameSpaceID, mAttrName, attrValue);
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SetText(attrValue, aNotify);
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}
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}
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