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nsXBLPrototypeBinding.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/ArrayUtils.h"
#include "nsCOMPtr.h"
#include "nsIAtom.h"
#include "nsIInputStream.h"
#include "nsNameSpaceManager.h"
#include "nsIURI.h"
#include "nsIURL.h"
#include "nsIChannel.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsNetUtil.h"
#include "plstr.h"
#include "nsContentCreatorFunctions.h"
#include "nsIDocument.h"
#include "nsIXMLContentSink.h"
#include "nsContentCID.h"
#include "mozilla/dom/XMLDocument.h"
#include "nsXBLService.h"
#include "nsXBLBinding.h"
#include "nsXBLPrototypeBinding.h"
#include "nsXBLContentSink.h"
#include "xptinfo.h"
#include "nsIInterfaceInfoManager.h"
#include "nsIDocumentObserver.h"
#include "nsGkAtoms.h"
#include "nsXBLProtoImpl.h"
#include "nsCRT.h"
#include "nsContentUtils.h"
#include "nsTextFragment.h"
#include "nsTextNode.h"
#include "nsIInterfaceInfo.h"
#include "nsIScriptError.h"
#include "nsIStyleRuleProcessor.h"
#include "nsXBLResourceLoader.h"
#include "mozilla/dom/CDATASection.h"
#include "mozilla/dom/Comment.h"
#include "mozilla/dom/Element.h"
#ifdef MOZ_XUL
#include "nsXULElement.h"
#endif
using namespace mozilla;
using namespace mozilla::dom;
// Helper Classes =====================================================================
// nsXBLAttributeEntry and helpers. This class is used to efficiently handle
// attribute changes in anonymous content.
class nsXBLAttributeEntry {
public:
nsXBLAttributeEntry(nsIAtom* aSrcAtom, nsIAtom* aDstAtom,
int32_t aDstNameSpace, nsIContent* aContent)
: mElement(aContent),
mSrcAttribute(aSrcAtom),
mDstAttribute(aDstAtom),
mDstNameSpace(aDstNameSpace),
mNext(nullptr) { }
~nsXBLAttributeEntry() {
NS_CONTENT_DELETE_LIST_MEMBER(nsXBLAttributeEntry, this, mNext);
}
nsIAtom* GetSrcAttribute() { return mSrcAttribute; }
nsIAtom* GetDstAttribute() { return mDstAttribute; }
int32_t GetDstNameSpace() { return mDstNameSpace; }
nsIContent* GetElement() { return mElement; }
nsXBLAttributeEntry* GetNext() { return mNext; }
void SetNext(nsXBLAttributeEntry* aEntry) { mNext = aEntry; }
protected:
nsIContent* mElement;
nsCOMPtr<nsIAtom> mSrcAttribute;
nsCOMPtr<nsIAtom> mDstAttribute;
int32_t mDstNameSpace;
nsXBLAttributeEntry* mNext;
};
// =============================================================================
// Implementation /////////////////////////////////////////////////////////////////
// Constructors/Destructors
nsXBLPrototypeBinding::nsXBLPrototypeBinding()
: mImplementation(nullptr),
mBaseBinding(nullptr),
mInheritStyle(true),
mCheckedBaseProto(false),
mKeyHandlersRegistered(false),
mChromeOnlyContent(false),
mResources(nullptr),
mBaseNameSpaceID(kNameSpaceID_None)
{
MOZ_COUNT_CTOR(nsXBLPrototypeBinding);
}
nsresult
nsXBLPrototypeBinding::Init(const nsACString& aID,
nsXBLDocumentInfo* aInfo,
nsIContent* aElement,
bool aFirstBinding)
{
nsresult rv = aInfo->DocumentURI()->Clone(getter_AddRefs(mBindingURI));
NS_ENSURE_SUCCESS(rv, rv);
// The binding URI might be an immutable URI (e.g. for about: URIs). In that case,
// we'll fail in SetRef below, but that doesn't matter much for now.
if (aFirstBinding) {
rv = mBindingURI->Clone(getter_AddRefs(mAlternateBindingURI));
NS_ENSURE_SUCCESS(rv, rv);
}
mBindingURI->SetRef(aID);
mXBLDocInfoWeak = aInfo;
// aElement will be null when reading from the cache, but the element will
// still be set later.
if (aElement) {
SetBindingElement(aElement);
}
return NS_OK;
}
bool nsXBLPrototypeBinding::CompareBindingURI(nsIURI* aURI) const
{
bool equal = false;
mBindingURI->Equals(aURI, &equal);
if (!equal && mAlternateBindingURI) {
mAlternateBindingURI->Equals(aURI, &equal);
}
return equal;
}
void
nsXBLPrototypeBinding::Traverse(nsCycleCollectionTraversalCallback &cb) const
{
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "proto mBinding");
cb.NoteXPCOMChild(mBinding);
if (mResources) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "proto mResources mLoader");
cb.NoteXPCOMChild(mResources->mLoader);
}
ImplCycleCollectionTraverse(cb, mInterfaceTable, "proto mInterfaceTable");
}
void
nsXBLPrototypeBinding::UnlinkJSObjects()
{
if (mImplementation)
mImplementation->UnlinkJSObjects();
}
void
nsXBLPrototypeBinding::Trace(const TraceCallbacks& aCallbacks, void *aClosure) const
{
if (mImplementation)
mImplementation->Trace(aCallbacks, aClosure);
}
void
nsXBLPrototypeBinding::Initialize()
{
nsIContent* content = GetImmediateChild(nsGkAtoms::content);
if (content) {
ConstructAttributeTable(content);
}
}
nsXBLPrototypeBinding::~nsXBLPrototypeBinding(void)
{
delete mResources;
delete mImplementation;
MOZ_COUNT_DTOR(nsXBLPrototypeBinding);
}
void
nsXBLPrototypeBinding::SetBasePrototype(nsXBLPrototypeBinding* aBinding)
{
if (mBaseBinding == aBinding)
return;
if (mBaseBinding) {
NS_ERROR("Base XBL prototype binding is already defined!");
return;
}
mBaseBinding = aBinding;
}
void
nsXBLPrototypeBinding::SetBindingElement(nsIContent* aElement)
{
mBinding = aElement;
if (mBinding->AttrValueIs(kNameSpaceID_None, nsGkAtoms::inheritstyle,
nsGkAtoms::_false, eCaseMatters))
mInheritStyle = false;
mChromeOnlyContent = mBinding->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::chromeOnlyContent,
nsGkAtoms::_true, eCaseMatters);
}
bool
nsXBLPrototypeBinding::GetAllowScripts() const
{
return mXBLDocInfoWeak->GetScriptAccess();
}
bool
nsXBLPrototypeBinding::LoadResources()
{
if (mResources) {
bool result;
mResources->LoadResources(&result);
return result;
}
return true;
}
nsresult
nsXBLPrototypeBinding::AddResource(nsIAtom* aResourceType, const nsAString& aSrc)
{
if (!mResources) {
mResources = new nsXBLPrototypeResources(this);
if (!mResources)
return NS_ERROR_OUT_OF_MEMORY;
}
mResources->AddResource(aResourceType, aSrc);
return NS_OK;
}
nsresult
nsXBLPrototypeBinding::FlushSkinSheets()
{
if (mResources)
return mResources->FlushSkinSheets();
return NS_OK;
}
nsresult
nsXBLPrototypeBinding::BindingAttached(nsIContent* aBoundElement)
{
if (mImplementation && mImplementation->CompiledMembers() &&
mImplementation->mConstructor)
return mImplementation->mConstructor->Execute(aBoundElement);
return NS_OK;
}
nsresult
nsXBLPrototypeBinding::BindingDetached(nsIContent* aBoundElement)
{
if (mImplementation && mImplementation->CompiledMembers() &&
mImplementation->mDestructor)
return mImplementation->mDestructor->Execute(aBoundElement);
return NS_OK;
}
nsXBLProtoImplAnonymousMethod*
nsXBLPrototypeBinding::GetConstructor()
{
if (mImplementation)
return mImplementation->mConstructor;
return nullptr;
}
nsXBLProtoImplAnonymousMethod*
nsXBLPrototypeBinding::GetDestructor()
{
if (mImplementation)
return mImplementation->mDestructor;
return nullptr;
}
nsresult
nsXBLPrototypeBinding::SetConstructor(nsXBLProtoImplAnonymousMethod* aMethod)
{
if (!mImplementation)
return NS_ERROR_FAILURE;
mImplementation->mConstructor = aMethod;
return NS_OK;
}
nsresult
nsXBLPrototypeBinding::SetDestructor(nsXBLProtoImplAnonymousMethod* aMethod)
{
if (!mImplementation)
return NS_ERROR_FAILURE;
mImplementation->mDestructor = aMethod;
return NS_OK;
}
nsresult
nsXBLPrototypeBinding::InstallImplementation(nsXBLBinding* aBinding)
{
if (mImplementation)
return mImplementation->InstallImplementation(this, aBinding);
return NS_OK;
}
// XXXbz this duplicates lots of SetAttrs
void
nsXBLPrototypeBinding::AttributeChanged(nsIAtom* aAttribute,
int32_t aNameSpaceID,
bool aRemoveFlag,
nsIContent* aChangedElement,
nsIContent* aAnonymousContent,
bool aNotify)
{
if (!mAttributeTable)
return;
InnerAttributeTable *attributesNS = mAttributeTable->Get(aNameSpaceID);
if (!attributesNS)
return;
nsXBLAttributeEntry* xblAttr = attributesNS->Get(aAttribute);
if (!xblAttr)
return;
// Iterate over the elements in the array.
nsCOMPtr<nsIContent> content = GetImmediateChild(nsGkAtoms::content);
while (xblAttr) {
nsIContent* element = xblAttr->GetElement();
nsCOMPtr<nsIContent> realElement = LocateInstance(aChangedElement, content,
aAnonymousContent,
element);
if (realElement) {
// Hold a strong reference here so that the atom doesn't go away during
// UnsetAttr.
nsCOMPtr<nsIAtom> dstAttr = xblAttr->GetDstAttribute();
int32_t dstNs = xblAttr->GetDstNameSpace();
if (aRemoveFlag)
realElement->UnsetAttr(dstNs, dstAttr, aNotify);
else {
bool attrPresent = true;
nsAutoString value;
// Check to see if the src attribute is xbl:text. If so, then we need to obtain the
// children of the real element and get the text nodes' values.
if (aAttribute == nsGkAtoms::text && aNameSpaceID == kNameSpaceID_XBL) {
if (!nsContentUtils::GetNodeTextContent(aChangedElement, false, value)) {
NS_RUNTIMEABORT("OOM");
}
value.StripChar(char16_t('\n'));
value.StripChar(char16_t('\r'));
nsAutoString stripVal(value);
stripVal.StripWhitespace();
if (stripVal.IsEmpty())
attrPresent = false;
}
else {
attrPresent = aChangedElement->GetAttr(aNameSpaceID, aAttribute, value);
}
if (attrPresent)
realElement->SetAttr(dstNs, dstAttr, value, aNotify);
}
// See if we're the <html> tag in XUL, and see if value is being
// set or unset on us. We may also be a tag that is having
// xbl:text set on us.
if ((dstAttr == nsGkAtoms::text && dstNs == kNameSpaceID_XBL) ||
(realElement->NodeInfo()->Equals(nsGkAtoms::html,
kNameSpaceID_XUL) &&
dstAttr == nsGkAtoms::value)) {
// Flush out all our kids.
uint32_t childCount = realElement->GetChildCount();
for (uint32_t i = 0; i < childCount; i++)
realElement->RemoveChildAt(0, aNotify);
if (!aRemoveFlag) {
// Construct a new text node and insert it.
nsAutoString value;
aChangedElement->GetAttr(aNameSpaceID, aAttribute, value);
if (!value.IsEmpty()) {
nsRefPtr<nsTextNode> textContent =
new nsTextNode(realElement->NodeInfo()->NodeInfoManager());
textContent->SetText(value, true);
realElement->AppendChildTo(textContent, true);
}
}
}
}
xblAttr = xblAttr->GetNext();
}
}
void
nsXBLPrototypeBinding::SetBaseTag(int32_t aNamespaceID, nsIAtom* aTag)
{
mBaseNameSpaceID = aNamespaceID;
mBaseTag = aTag;
}
nsIAtom*
nsXBLPrototypeBinding::GetBaseTag(int32_t* aNamespaceID)
{
if (mBaseTag) {
*aNamespaceID = mBaseNameSpaceID;
return mBaseTag;
}
return nullptr;
}
bool
nsXBLPrototypeBinding::ImplementsInterface(REFNSIID aIID) const
{
// Check our IID table.
return !!mInterfaceTable.GetWeak(aIID);
}
// Internal helpers ///////////////////////////////////////////////////////////////////////
nsIContent*
nsXBLPrototypeBinding::GetImmediateChild(nsIAtom* aTag)
{
for (nsIContent* child = mBinding->GetFirstChild();
child;
child = child->GetNextSibling()) {
if (child->NodeInfo()->Equals(aTag, kNameSpaceID_XBL)) {
return child;
}
}
return nullptr;
}
nsresult
nsXBLPrototypeBinding::InitClass(const nsCString& aClassName,
JSContext * aContext,
JS::Handle<JSObject*> aScriptObject,
JS::MutableHandle<JSObject*> aClassObject,
bool* aNew)
{
return nsXBLBinding::DoInitJSClass(aContext, aScriptObject,
aClassName, this, aClassObject, aNew);
}
nsIContent*
nsXBLPrototypeBinding::LocateInstance(nsIContent* aBoundElement,
nsIContent* aTemplRoot,
nsIContent* aCopyRoot,
nsIContent* aTemplChild)
{
// XXX We will get in trouble if the binding instantiation deviates from the template
// in the prototype.
if (aTemplChild == aTemplRoot || !aTemplChild)
return nullptr;
nsIContent* templParent = aTemplChild->GetParent();
// We may be disconnected from our parent during cycle collection.
if (!templParent)
return nullptr;
nsIContent *copyParent =
templParent == aTemplRoot ? aCopyRoot :
LocateInstance(aBoundElement, aTemplRoot, aCopyRoot, templParent);
if (!copyParent)
return nullptr;
return copyParent->GetChildAt(templParent->IndexOf(aTemplChild));
}
struct nsXBLAttrChangeData
{
nsXBLPrototypeBinding* mProto;
nsIContent* mBoundElement;
nsIContent* mContent;
int32_t mSrcNamespace;
nsXBLAttrChangeData(nsXBLPrototypeBinding* aProto,
nsIContent* aElt, nsIContent* aContent)
:mProto(aProto), mBoundElement(aElt), mContent(aContent) {}
};
// XXXbz this duplicates lots of AttributeChanged
static PLDHashOperator
SetAttrs(nsISupports* aKey, nsXBLAttributeEntry* aEntry, void* aClosure)
{
nsXBLAttrChangeData* changeData = static_cast<nsXBLAttrChangeData*>(aClosure);
nsIAtom* src = aEntry->GetSrcAttribute();
int32_t srcNs = changeData->mSrcNamespace;
nsAutoString value;
bool attrPresent = true;
if (src == nsGkAtoms::text && srcNs == kNameSpaceID_XBL) {
if (!nsContentUtils::GetNodeTextContent(changeData->mBoundElement, false,
value)) {
NS_RUNTIMEABORT("OOM");
}
value.StripChar(char16_t('\n'));
value.StripChar(char16_t('\r'));
nsAutoString stripVal(value);
stripVal.StripWhitespace();
if (stripVal.IsEmpty())
attrPresent = false;
}
else {
attrPresent = changeData->mBoundElement->GetAttr(srcNs, src, value);
}
if (attrPresent) {
nsIContent* content =
changeData->mProto->GetImmediateChild(nsGkAtoms::content);
nsXBLAttributeEntry* curr = aEntry;
while (curr) {
nsIAtom* dst = curr->GetDstAttribute();
int32_t dstNs = curr->GetDstNameSpace();
nsIContent* element = curr->GetElement();
nsIContent *realElement =
changeData->mProto->LocateInstance(changeData->mBoundElement, content,
changeData->mContent, element);
if (realElement) {
realElement->SetAttr(dstNs, dst, value, false);
// XXXndeakin shouldn't this be done in lieu of SetAttr?
if ((dst == nsGkAtoms::text && dstNs == kNameSpaceID_XBL) ||
(realElement->NodeInfo()->Equals(nsGkAtoms::html,
kNameSpaceID_XUL) &&
dst == nsGkAtoms::value && !value.IsEmpty())) {
nsRefPtr<nsTextNode> textContent =
new nsTextNode(realElement->NodeInfo()->NodeInfoManager());
textContent->SetText(value, false);
realElement->AppendChildTo(textContent, false);
}
}
curr = curr->GetNext();
}
}
return PL_DHASH_NEXT;
}
static PLDHashOperator
SetAttrsNS(const uint32_t &aNamespace,
nsXBLPrototypeBinding::InnerAttributeTable* aXBLAttributes,
void* aClosure)
{
if (aXBLAttributes && aClosure) {
nsXBLAttrChangeData* changeData = static_cast<nsXBLAttrChangeData*>(aClosure);
changeData->mSrcNamespace = aNamespace;
aXBLAttributes->EnumerateRead(SetAttrs, aClosure);
}
return PL_DHASH_NEXT;
}
void
nsXBLPrototypeBinding::SetInitialAttributes(nsIContent* aBoundElement, nsIContent* aAnonymousContent)
{
if (mAttributeTable) {
nsXBLAttrChangeData data(this, aBoundElement, aAnonymousContent);
mAttributeTable->EnumerateRead(SetAttrsNS, &data);
}
}
nsIStyleRuleProcessor*
nsXBLPrototypeBinding::GetRuleProcessor()
{
if (mResources) {
return mResources->mRuleProcessor;
}
return nullptr;
}
nsXBLPrototypeResources::sheet_array_type*
nsXBLPrototypeBinding::GetOrCreateStyleSheets()
{
if (!mResources) {
mResources = new nsXBLPrototypeResources(this);
}
return &mResources->mStyleSheetList;
}
nsXBLPrototypeResources::sheet_array_type*
nsXBLPrototypeBinding::GetStyleSheets()
{
if (mResources) {
return &mResources->mStyleSheetList;
}
return nullptr;
}
void
nsXBLPrototypeBinding::EnsureAttributeTable()
{
if (!mAttributeTable) {
mAttributeTable = new nsClassHashtable<nsUint32HashKey, InnerAttributeTable>(4);
}
}
void
nsXBLPrototypeBinding::AddToAttributeTable(int32_t aSourceNamespaceID, nsIAtom* aSourceTag,
int32_t aDestNamespaceID, nsIAtom* aDestTag,
nsIContent* aContent)
{
InnerAttributeTable* attributesNS = mAttributeTable->Get(aSourceNamespaceID);
if (!attributesNS) {
attributesNS = new InnerAttributeTable(4);
mAttributeTable->Put(aSourceNamespaceID, attributesNS);
}
nsXBLAttributeEntry* xblAttr =
new nsXBLAttributeEntry(aSourceTag, aDestTag, aDestNamespaceID, aContent);
nsXBLAttributeEntry* entry = attributesNS->Get(aSourceTag);
if (!entry) {
attributesNS->Put(aSourceTag, xblAttr);
} else {
while (entry->GetNext())
entry = entry->GetNext();
entry->SetNext(xblAttr);
}
}
void
nsXBLPrototypeBinding::ConstructAttributeTable(nsIContent* aElement)
{
// Don't add entries for <children> elements, since those will get
// removed from the DOM when we construct the insertion point table.
if (!aElement->NodeInfo()->Equals(nsGkAtoms::children, kNameSpaceID_XBL)) {
nsAutoString inherits;
aElement->GetAttr(kNameSpaceID_XBL, nsGkAtoms::inherits, inherits);
if (!inherits.IsEmpty()) {
EnsureAttributeTable();
// The user specified at least one attribute.
char* str = ToNewCString(inherits);
char* newStr;
// XXX We should use a strtok function that tokenizes PRUnichars
// so that we don't have to convert from Unicode to ASCII and then back
char* token = nsCRT::strtok( str, ", ", &newStr );
while( token != nullptr ) {
// Build an atom out of this attribute.
nsCOMPtr<nsIAtom> atom;
int32_t atomNsID = kNameSpaceID_None;
nsCOMPtr<nsIAtom> attribute;
int32_t attributeNsID = kNameSpaceID_None;
// Figure out if this token contains a :.
nsAutoString attrTok; attrTok.AssignWithConversion(token);
int32_t index = attrTok.Find("=", true);
nsresult rv;
if (index != -1) {
// This attribute maps to something different.
nsAutoString left, right;
attrTok.Left(left, index);
attrTok.Right(right, attrTok.Length()-index-1);
rv = nsContentUtils::SplitQName(aElement, left, &attributeNsID,
getter_AddRefs(attribute));
if (NS_FAILED(rv))
return;
rv = nsContentUtils::SplitQName(aElement, right, &atomNsID,
getter_AddRefs(atom));
if (NS_FAILED(rv))
return;
}
else {
nsAutoString tok;
tok.AssignWithConversion(token);
rv = nsContentUtils::SplitQName(aElement, tok, &atomNsID,
getter_AddRefs(atom));
if (NS_FAILED(rv))
return;
attribute = atom;
attributeNsID = atomNsID;
}
AddToAttributeTable(atomNsID, atom, attributeNsID, attribute, aElement);
// Now remove the inherits attribute from the element so that it doesn't
// show up on clones of the element. It is used
// by the template only, and we don't need it anymore.
// XXXdwh Don't do this for XUL elements, since it faults them into heavyweight
// elements. Should nuke from the prototype instead.
// aElement->UnsetAttr(kNameSpaceID_XBL, nsGkAtoms::inherits, false);
token = nsCRT::strtok( newStr, ", ", &newStr );
}
nsMemory::Free(str);
}
}
// Recur into our children.
for (nsIContent* child = aElement->GetFirstChild();
child;
child = child->GetNextSibling()) {
ConstructAttributeTable(child);
}
}
nsresult
nsXBLPrototypeBinding::ConstructInterfaceTable(const nsAString& aImpls)
{
if (!aImpls.IsEmpty()) {
// Obtain the interface info manager that can tell us the IID
// for a given interface name.
nsCOMPtr<nsIInterfaceInfoManager>
infoManager(do_GetService(NS_INTERFACEINFOMANAGER_SERVICE_CONTRACTID));
if (!infoManager)
return NS_ERROR_FAILURE;
// The user specified at least one attribute.
NS_ConvertUTF16toUTF8 utf8impl(aImpls);
char* str = utf8impl.BeginWriting();
char* newStr;
// XXX We should use a strtok function that tokenizes PRUnichars
// so that we don't have to convert from Unicode to ASCII and then back
char* token = nsCRT::strtok( str, ", ", &newStr );
while( token != nullptr ) {
// get the InterfaceInfo for the name
nsCOMPtr<nsIInterfaceInfo> iinfo;
infoManager->GetInfoForName(token, getter_AddRefs(iinfo));
if (iinfo) {
// obtain an IID.
const nsIID* iid = nullptr;
iinfo->GetIIDShared(&iid);
if (iid) {
// We found a valid iid. Add it to our table.
mInterfaceTable.Put(*iid, mBinding);
// this block adds the parent interfaces of each interface
// defined in the xbl definition (implements="nsI...")
nsCOMPtr<nsIInterfaceInfo> parentInfo;
// if it has a parent, add it to the table
while (NS_SUCCEEDED(iinfo->GetParent(getter_AddRefs(parentInfo))) && parentInfo) {
// get the iid
parentInfo->GetIIDShared(&iid);
// don't add nsISupports to the table
if (!iid || iid->Equals(NS_GET_IID(nsISupports)))
break;
// add the iid to the table
mInterfaceTable.Put(*iid, mBinding);
// look for the next parent
iinfo = parentInfo;
}
}
}
token = nsCRT::strtok( newStr, ", ", &newStr );
}
}
return NS_OK;
}
nsresult
nsXBLPrototypeBinding::AddResourceListener(nsIContent* aBoundElement)
{
if (!mResources)
return NS_ERROR_FAILURE; // Makes no sense to add a listener when the binding
// has no resources.
mResources->AddResourceListener(aBoundElement);
return NS_OK;
}
void
nsXBLPrototypeBinding::CreateKeyHandlers()
{
nsXBLPrototypeHandler* curr = mPrototypeHandler;
while (curr) {
nsCOMPtr<nsIAtom> eventAtom = curr->GetEventName();
if (eventAtom == nsGkAtoms::keyup ||
eventAtom == nsGkAtoms::keydown ||
eventAtom == nsGkAtoms::keypress) {
uint8_t phase = curr->GetPhase();
uint8_t type = curr->GetType();
int32_t count = mKeyHandlers.Count();
int32_t i;
nsXBLKeyEventHandler* handler = nullptr;
for (i = 0; i < count; ++i) {
handler = mKeyHandlers[i];
if (handler->Matches(eventAtom, phase, type))
break;
}
if (i == count) {
nsRefPtr<nsXBLKeyEventHandler> newHandler;
NS_NewXBLKeyEventHandler(eventAtom, phase, type,
getter_AddRefs(newHandler));
if (newHandler)
mKeyHandlers.AppendObject(newHandler);
handler = newHandler;
}
if (handler)
handler->AddProtoHandler(curr);
}
curr = curr->GetNextHandler();
}
}
class XBLPrototypeSetupCleanup
{
public:
XBLPrototypeSetupCleanup(nsXBLDocumentInfo* aDocInfo, const nsACString& aID)
: mDocInfo(aDocInfo), mID(aID) {}
~XBLPrototypeSetupCleanup()
{
if (mDocInfo) {
mDocInfo->RemovePrototypeBinding(mID);
}
}
void Disconnect()
{
mDocInfo = nullptr;
}
nsXBLDocumentInfo* mDocInfo;
nsAutoCString mID;
};
nsresult
nsXBLPrototypeBinding::Read(nsIObjectInputStream* aStream,
nsXBLDocumentInfo* aDocInfo,
nsIDocument* aDocument,
uint8_t aFlags)
{
mInheritStyle = (aFlags & XBLBinding_Serialize_InheritStyle) ? true : false;
mChromeOnlyContent =
(aFlags & XBLBinding_Serialize_ChromeOnlyContent) ? true : false;
// nsXBLContentSink::ConstructBinding doesn't create a binding with an empty
// id, so we don't here either.
nsAutoCString id;
nsresult rv = aStream->ReadCString(id);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(!id.IsEmpty(), NS_ERROR_FAILURE);
nsAutoCString baseBindingURI;
rv = aStream->ReadCString(baseBindingURI);
NS_ENSURE_SUCCESS(rv, rv);
mCheckedBaseProto = true;
if (!baseBindingURI.IsEmpty()) {
rv = NS_NewURI(getter_AddRefs(mBaseBindingURI), baseBindingURI);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = ReadNamespace(aStream, mBaseNameSpaceID);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString baseTag;
rv = aStream->ReadString(baseTag);
NS_ENSURE_SUCCESS(rv, rv);
if (!baseTag.IsEmpty()) {
mBaseTag = do_GetAtom(baseTag);
}
aDocument->CreateElem(NS_LITERAL_STRING("binding"), nullptr, kNameSpaceID_XBL,
getter_AddRefs(mBinding));
nsCOMPtr<nsIContent> child;
rv = ReadContentNode(aStream, aDocument, aDocument->NodeInfoManager(), getter_AddRefs(child));
NS_ENSURE_SUCCESS(rv, rv);
Element* rootElement = aDocument->GetRootElement();
if (rootElement)
rootElement->AppendChildTo(mBinding, false);
if (child) {
mBinding->AppendChildTo(child, false);
}
uint32_t interfaceCount;
rv = aStream->Read32(&interfaceCount);
NS_ENSURE_SUCCESS(rv, rv);
for (; interfaceCount > 0; interfaceCount--) {
nsIID iid;
aStream->ReadID(&iid);
mInterfaceTable.Put(iid, mBinding);
}
AutoSafeJSContext cx;
JS::Rooted<JSObject*> compilationGlobal(cx, aDocInfo->GetCompilationGlobal());
NS_ENSURE_TRUE(compilationGlobal, NS_ERROR_UNEXPECTED);
JSAutoCompartment ac(cx, compilationGlobal);
bool isFirstBinding = aFlags & XBLBinding_Serialize_IsFirstBinding;
rv = Init(id, aDocInfo, nullptr, isFirstBinding);
NS_ENSURE_SUCCESS(rv, rv);
// We need to set the prototype binding before reading the nsXBLProtoImpl,
// as it may be retrieved within.
rv = aDocInfo->SetPrototypeBinding(id, this);
NS_ENSURE_SUCCESS(rv, rv);
XBLPrototypeSetupCleanup cleanup(aDocInfo, id);
nsAutoCString className;
rv = aStream->ReadCString(className);
NS_ENSURE_SUCCESS(rv, rv);
if (!className.IsEmpty()) {
nsXBLProtoImpl* impl; // NS_NewXBLProtoImpl will set mImplementation for us
NS_NewXBLProtoImpl(this, NS_ConvertUTF8toUTF16(className).get(), &impl);
// This needs to happen after SetPrototypeBinding as calls are made to
// retrieve the mapped bindings from within here. However, if an error
// occurs, the mapping should be removed again so that we don't keep an
// invalid binding around.
rv = mImplementation->Read(aStream, this);
NS_ENSURE_SUCCESS(rv, rv);
}
// Next read in the handlers.
nsXBLPrototypeHandler* previousHandler = nullptr;
do {
XBLBindingSerializeDetails type;
rv = aStream->Read8(&type);
NS_ENSURE_SUCCESS(rv, rv);
if (type == XBLBinding_Serialize_NoMoreItems)
break;
NS_ASSERTION((type & XBLBinding_Serialize_Mask) == XBLBinding_Serialize_Handler,
"invalid handler type");
nsXBLPrototypeHandler* handler = new nsXBLPrototypeHandler(this);
rv = handler->Read(aStream);
if (NS_FAILED(rv)) {
delete handler;
return rv;
}
if (previousHandler) {
previousHandler->SetNextHandler(handler);
}
else {
SetPrototypeHandlers(handler);
}
previousHandler = handler;
} while (1);
if (mBinding) {
while (true) {
XBLBindingSerializeDetails type;
rv = aStream->Read8(&type);
NS_ENSURE_SUCCESS(rv, rv);
if (type != XBLBinding_Serialize_Attribute) {
break;
}
int32_t attrNamespace;
rv = ReadNamespace(aStream, attrNamespace);
NS_ENSURE_SUCCESS(rv, rv);