mirror of
https://github.com/mozilla/gecko-dev.git
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371 lines
11 KiB
C++
371 lines
11 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 "nsIAtom.h"
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#include "nsString.h"
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#include "jsapi.h"
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#include "nsIContent.h"
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#include "nsXBLProtoImplProperty.h"
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#include "nsUnicharUtils.h"
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#include "nsReadableUtils.h"
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#include "nsJSUtils.h"
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#include "nsXBLPrototypeBinding.h"
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#include "nsXBLSerialize.h"
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#include "xpcpublic.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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nsXBLProtoImplProperty::nsXBLProtoImplProperty(const char16_t* aName,
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const char16_t* aGetter,
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const char16_t* aSetter,
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const char16_t* aReadOnly,
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uint32_t aLineNumber) :
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nsXBLProtoImplMember(aName),
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mJSAttributes(JSPROP_ENUMERATE)
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#ifdef DEBUG
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, mIsCompiled(false)
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#endif
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{
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MOZ_COUNT_CTOR(nsXBLProtoImplProperty);
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if (aReadOnly) {
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nsAutoString readOnly; readOnly.Assign(*aReadOnly);
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if (readOnly.LowerCaseEqualsLiteral("true"))
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mJSAttributes |= JSPROP_READONLY;
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}
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if (aGetter) {
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AppendGetterText(nsDependentString(aGetter));
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SetGetterLineNumber(aLineNumber);
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}
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if (aSetter) {
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AppendSetterText(nsDependentString(aSetter));
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SetSetterLineNumber(aLineNumber);
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}
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}
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nsXBLProtoImplProperty::nsXBLProtoImplProperty(const char16_t* aName,
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const bool aIsReadOnly)
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: nsXBLProtoImplMember(aName),
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mJSAttributes(JSPROP_ENUMERATE)
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#ifdef DEBUG
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, mIsCompiled(false)
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#endif
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{
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MOZ_COUNT_CTOR(nsXBLProtoImplProperty);
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if (aIsReadOnly)
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mJSAttributes |= JSPROP_READONLY;
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}
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nsXBLProtoImplProperty::~nsXBLProtoImplProperty()
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{
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MOZ_COUNT_DTOR(nsXBLProtoImplProperty);
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if (!mGetter.IsCompiled()) {
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delete mGetter.GetUncompiled();
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}
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if (!mSetter.IsCompiled()) {
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delete mSetter.GetUncompiled();
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}
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}
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void nsXBLProtoImplProperty::EnsureUncompiledText(PropertyOp& aPropertyOp)
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{
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if (!aPropertyOp.GetUncompiled()) {
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nsXBLTextWithLineNumber* text = new nsXBLTextWithLineNumber();
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aPropertyOp.SetUncompiled(text);
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}
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}
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void
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nsXBLProtoImplProperty::AppendGetterText(const nsAString& aText)
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{
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NS_PRECONDITION(!mIsCompiled,
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"Must not be compiled when accessing getter text");
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EnsureUncompiledText(mGetter);
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mGetter.GetUncompiled()->AppendText(aText);
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}
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void
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nsXBLProtoImplProperty::AppendSetterText(const nsAString& aText)
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{
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NS_PRECONDITION(!mIsCompiled,
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"Must not be compiled when accessing setter text");
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EnsureUncompiledText(mSetter);
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mSetter.GetUncompiled()->AppendText(aText);
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}
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void
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nsXBLProtoImplProperty::SetGetterLineNumber(uint32_t aLineNumber)
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{
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NS_PRECONDITION(!mIsCompiled,
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"Must not be compiled when accessing getter text");
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EnsureUncompiledText(mGetter);
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mGetter.GetUncompiled()->SetLineNumber(aLineNumber);
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}
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void
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nsXBLProtoImplProperty::SetSetterLineNumber(uint32_t aLineNumber)
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{
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NS_PRECONDITION(!mIsCompiled,
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"Must not be compiled when accessing setter text");
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EnsureUncompiledText(mSetter);
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mSetter.GetUncompiled()->SetLineNumber(aLineNumber);
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}
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const char* gPropertyArgs[] = { "val" };
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nsresult
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nsXBLProtoImplProperty::InstallMember(JSContext *aCx,
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JS::Handle<JSObject*> aTargetClassObject)
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{
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NS_PRECONDITION(mIsCompiled,
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"Should not be installing an uncompiled property");
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MOZ_ASSERT(mGetter.IsCompiled() && mSetter.IsCompiled());
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MOZ_ASSERT(js::IsObjectInContextCompartment(aTargetClassObject, aCx));
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#ifdef DEBUG
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{
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JS::Rooted<JSObject*> globalObject(aCx, JS_GetGlobalForObject(aCx, aTargetClassObject));
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MOZ_ASSERT(xpc::IsInContentXBLScope(globalObject) ||
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xpc::IsInAddonScope(globalObject) ||
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globalObject == xpc::GetXBLScope(aCx, globalObject));
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MOZ_ASSERT(JS::CurrentGlobalOrNull(aCx) == globalObject);
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}
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#endif
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JS::Rooted<JSObject*> getter(aCx, mGetter.GetJSFunction());
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JS::Rooted<JSObject*> setter(aCx, mSetter.GetJSFunction());
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if (getter || setter) {
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if (getter) {
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if (!(getter = JS::CloneFunctionObject(aCx, getter)))
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (setter) {
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if (!(setter = JS::CloneFunctionObject(aCx, setter)))
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsDependentString name(mName);
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if (!::JS_DefineUCProperty(aCx, aTargetClassObject,
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static_cast<const char16_t*>(mName),
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name.Length(), JS::UndefinedHandleValue, mJSAttributes,
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JS_DATA_TO_FUNC_PTR(JSNative, getter.get()),
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JS_DATA_TO_FUNC_PTR(JSNative, setter.get())))
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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nsresult
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nsXBLProtoImplProperty::CompileMember(AutoJSAPI& jsapi, const nsString& aClassStr,
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JS::Handle<JSObject*> aClassObject)
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{
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AssertInCompilationScope();
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NS_PRECONDITION(!mIsCompiled,
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"Trying to compile an already-compiled property");
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NS_PRECONDITION(aClassObject,
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"Must have class object to compile");
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MOZ_ASSERT(!mGetter.IsCompiled() && !mSetter.IsCompiled());
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JSContext *cx = jsapi.cx();
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if (!mName)
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return NS_ERROR_FAILURE; // Without a valid name, we can't install the member.
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// We have a property.
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nsresult rv = NS_OK;
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nsAutoCString functionUri;
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if (mGetter.GetUncompiled() || mSetter.GetUncompiled()) {
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functionUri = NS_ConvertUTF16toUTF8(aClassStr);
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int32_t hash = functionUri.RFindChar('#');
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if (hash != kNotFound) {
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functionUri.Truncate(hash);
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}
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}
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bool deletedGetter = false;
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nsXBLTextWithLineNumber *getterText = mGetter.GetUncompiled();
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if (getterText && getterText->GetText()) {
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nsDependentString getter(getterText->GetText());
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if (!getter.IsEmpty()) {
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JSAutoCompartment ac(cx, aClassObject);
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JS::CompileOptions options(cx);
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options.setFileAndLine(functionUri.get(), getterText->GetLineNumber())
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.setVersion(JSVERSION_LATEST);
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nsCString name = NS_LITERAL_CSTRING("get_") + NS_ConvertUTF16toUTF8(mName);
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JS::Rooted<JSObject*> getterObject(cx);
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JS::AutoObjectVector emptyVector(cx);
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rv = nsJSUtils::CompileFunction(jsapi, emptyVector, options, name, 0,
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nullptr, getter, getterObject.address());
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delete getterText;
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deletedGetter = true;
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mGetter.SetJSFunction(getterObject);
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if (mGetter.GetJSFunction() && NS_SUCCEEDED(rv)) {
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mJSAttributes |= JSPROP_GETTER | JSPROP_SHARED;
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}
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if (NS_FAILED(rv)) {
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mGetter.SetJSFunction(nullptr);
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mJSAttributes &= ~JSPROP_GETTER;
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/*chaining to return failure*/
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}
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}
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} // if getter is not empty
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if (!deletedGetter) { // Empty getter
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delete getterText;
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mGetter.SetJSFunction(nullptr);
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}
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if (NS_FAILED(rv)) {
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// We failed to compile our getter. So either we've set it to null, or
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// it's still set to the text object. In either case, it's safe to return
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// the error here, since then we'll be cleaned up as uncompiled and that
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// will be ok. Going on and compiling the setter and _then_ returning an
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// error, on the other hand, will try to clean up a compiled setter as
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// uncompiled and crash.
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return rv;
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}
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bool deletedSetter = false;
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nsXBLTextWithLineNumber *setterText = mSetter.GetUncompiled();
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if (setterText && setterText->GetText()) {
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nsDependentString setter(setterText->GetText());
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if (!setter.IsEmpty()) {
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JSAutoCompartment ac(cx, aClassObject);
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JS::CompileOptions options(cx);
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options.setFileAndLine(functionUri.get(), setterText->GetLineNumber())
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.setVersion(JSVERSION_LATEST);
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nsCString name = NS_LITERAL_CSTRING("set_") + NS_ConvertUTF16toUTF8(mName);
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JS::Rooted<JSObject*> setterObject(cx);
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JS::AutoObjectVector emptyVector(cx);
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rv = nsJSUtils::CompileFunction(jsapi, emptyVector, options, name, 1,
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gPropertyArgs, setter,
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setterObject.address());
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delete setterText;
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deletedSetter = true;
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mSetter.SetJSFunction(setterObject);
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if (mSetter.GetJSFunction() && NS_SUCCEEDED(rv)) {
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mJSAttributes |= JSPROP_SETTER | JSPROP_SHARED;
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}
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if (NS_FAILED(rv)) {
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mSetter.SetJSFunction(nullptr);
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mJSAttributes &= ~JSPROP_SETTER;
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/*chaining to return failure*/
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}
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}
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} // if setter wasn't empty....
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if (!deletedSetter) { // Empty setter
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delete setterText;
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mSetter.SetJSFunction(nullptr);
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}
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#ifdef DEBUG
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mIsCompiled = NS_SUCCEEDED(rv);
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#endif
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return rv;
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}
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void
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nsXBLProtoImplProperty::Trace(const TraceCallbacks& aCallbacks, void *aClosure)
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{
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if (mJSAttributes & JSPROP_GETTER) {
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aCallbacks.Trace(&mGetter.AsHeapObject(), "mGetter", aClosure);
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}
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if (mJSAttributes & JSPROP_SETTER) {
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aCallbacks.Trace(&mSetter.AsHeapObject(), "mSetter", aClosure);
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}
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}
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nsresult
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nsXBLProtoImplProperty::Read(nsIObjectInputStream* aStream,
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XBLBindingSerializeDetails aType)
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{
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AssertInCompilationScope();
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MOZ_ASSERT(!mIsCompiled);
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MOZ_ASSERT(!mGetter.GetUncompiled() && !mSetter.GetUncompiled());
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AutoJSContext cx;
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JS::Rooted<JSObject*> getterObject(cx);
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if (aType == XBLBinding_Serialize_GetterProperty ||
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aType == XBLBinding_Serialize_GetterSetterProperty) {
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nsresult rv = XBL_DeserializeFunction(aStream, &getterObject);
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NS_ENSURE_SUCCESS(rv, rv);
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mJSAttributes |= JSPROP_GETTER | JSPROP_SHARED;
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}
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mGetter.SetJSFunction(getterObject);
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JS::Rooted<JSObject*> setterObject(cx);
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if (aType == XBLBinding_Serialize_SetterProperty ||
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aType == XBLBinding_Serialize_GetterSetterProperty) {
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nsresult rv = XBL_DeserializeFunction(aStream, &setterObject);
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NS_ENSURE_SUCCESS(rv, rv);
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mJSAttributes |= JSPROP_SETTER | JSPROP_SHARED;
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}
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mSetter.SetJSFunction(setterObject);
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#ifdef DEBUG
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mIsCompiled = true;
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#endif
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return NS_OK;
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}
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nsresult
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nsXBLProtoImplProperty::Write(nsIObjectOutputStream* aStream)
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{
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AssertInCompilationScope();
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XBLBindingSerializeDetails type;
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if (mJSAttributes & JSPROP_GETTER) {
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type = mJSAttributes & JSPROP_SETTER ?
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XBLBinding_Serialize_GetterSetterProperty :
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XBLBinding_Serialize_GetterProperty;
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}
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else {
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type = XBLBinding_Serialize_SetterProperty;
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}
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if (mJSAttributes & JSPROP_READONLY) {
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type |= XBLBinding_Serialize_ReadOnly;
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}
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nsresult rv = aStream->Write8(type);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = aStream->WriteWStringZ(mName);
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NS_ENSURE_SUCCESS(rv, rv);
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MOZ_ASSERT_IF(mJSAttributes & (JSPROP_GETTER | JSPROP_SETTER), mIsCompiled);
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if (mJSAttributes & JSPROP_GETTER) {
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JS::Rooted<JSObject*> function(RootingCx(), mGetter.GetJSFunction());
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rv = XBL_SerializeFunction(aStream, function);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (mJSAttributes & JSPROP_SETTER) {
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JS::Rooted<JSObject*> function(RootingCx(), mSetter.GetJSFunction());
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rv = XBL_SerializeFunction(aStream, function);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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