gecko-dev/dom/workers/File.cpp

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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
2012-05-21 11:12:37 +00:00
/* 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 "File.h"
#include "nsIDOMFile.h"
#include "nsDOMBlobBuilder.h"
#include "nsError.h"
#include "jsapi.h"
#include "jsfriendapi.h"
#include "nsCOMPtr.h"
#include "nsJSUtils.h"
#include "nsString.h"
#include "mozilla/dom/Exceptions.h"
#include "WorkerInlines.h"
#include "WorkerPrivate.h"
USING_WORKERS_NAMESPACE
using mozilla::dom::Throw;
namespace {
class Blob
{
// Blob should never be instantiated.
Blob();
~Blob();
static const JSClass sClass;
static const JSPropertySpec sProperties[];
static const JSFunctionSpec sFunctions[];
public:
static JSObject*
InitClass(JSContext* aCx, JS::Handle<JSObject*> aObj)
{
return JS_InitClass(aCx, aObj, JS::NullPtr(), &sClass, Construct, 0,
sProperties, sFunctions, nullptr, nullptr);
}
static JSObject*
Create(JSContext* aCx, nsIDOMBlob* aBlob)
{
MOZ_ASSERT(SameCOMIdentity(static_cast<nsISupports*>(aBlob), aBlob));
JSObject* obj = JS_NewObject(aCx, &sClass, JS::NullPtr(), JS::NullPtr());
if (obj) {
JS_SetPrivate(obj, aBlob);
NS_ADDREF(aBlob);
}
return obj;
}
static nsIDOMBlob*
GetPrivate(JSObject* aObj);
private:
static nsIDOMBlob*
GetInstancePrivate(JSContext* aCx, JS::Handle<JSObject*> aObj, const char* aFunctionName)
{
nsIDOMBlob* blob = GetPrivate(aObj);
if (blob) {
return blob;
}
JS_ReportErrorNumber(aCx, js_GetErrorMessage, nullptr,
JSMSG_INCOMPATIBLE_PROTO, sClass.name, aFunctionName,
JS_GetClass(aObj)->name);
return nullptr;
}
static nsIDOMBlob*
Unwrap(JSContext* aCx, JSObject* aObj)
{
return GetPrivate(aObj);
}
static bool
Construct(JSContext* aCx, unsigned aArgc, jsval* aVp)
{
JS::CallArgs args = CallArgsFromVp(aArgc, aVp);
nsRefPtr<nsDOMMultipartFile> file = new nsDOMMultipartFile();
nsresult rv = file->InitBlob(aCx, args.length(), args.array(), Unwrap);
if (NS_FAILED(rv)) {
return Throw(aCx, rv);
}
JSObject* obj = file::CreateBlob(aCx, file);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
static void
Finalize(JSFreeOp* aFop, JSObject* aObj)
{
MOZ_ASSERT(JS_GetClass(aObj) == &sClass);
nsIDOMBlob* blob = GetPrivate(aObj);
NS_IF_RELEASE(blob);
}
static bool
IsBlob(JS::Handle<JS::Value> v)
{
return v.isObject() && GetPrivate(&v.toObject()) != nullptr;
}
static bool
GetSizeImpl(JSContext* aCx, JS::CallArgs aArgs)
{
JS::Rooted<JSObject*> obj(aCx, &aArgs.thisv().toObject());
nsIDOMBlob* blob = GetInstancePrivate(aCx, obj, "size");
MOZ_ASSERT(blob);
uint64_t size;
if (NS_FAILED(blob->GetSize(&size))) {
return Throw(aCx, NS_ERROR_DOM_FILE_NOT_READABLE_ERR);
}
aArgs.rval().setNumber(double(size));
return true;
}
static bool
GetSize(JSContext* aCx, unsigned aArgc, JS::Value* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
return JS::CallNonGenericMethod<IsBlob, GetSizeImpl>(aCx, args);
}
static bool
GetTypeImpl(JSContext* aCx, JS::CallArgs aArgs)
{
JS::Rooted<JSObject*> obj(aCx, &aArgs.thisv().toObject());
nsIDOMBlob* blob = GetInstancePrivate(aCx, obj, "type");
MOZ_ASSERT(blob);
nsString type;
if (NS_FAILED(blob->GetType(type))) {
return Throw(aCx, NS_ERROR_DOM_FILE_NOT_READABLE_ERR);
}
JSString* jsType = JS_NewUCStringCopyN(aCx, type.get(), type.Length());
if (!jsType) {
return false;
}
aArgs.rval().setString(jsType);
return true;
}
static bool
GetType(JSContext* aCx, unsigned aArgc, JS::Value* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
return JS::CallNonGenericMethod<IsBlob, GetTypeImpl>(aCx, args);
}
static bool
Slice(JSContext* aCx, unsigned aArgc, jsval* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
JS::Rooted<JSObject*> obj(aCx, args.thisv().toObjectOrNull());
if (!obj) {
return false;
}
nsIDOMBlob* blob = GetInstancePrivate(aCx, obj, "slice");
if (!blob) {
return false;
}
double start = 0, end = 0;
JS::Rooted<JSString*> jsContentType(aCx, JS_GetEmptyString(JS_GetRuntime(aCx)));
if (!JS_ConvertArguments(aCx, args, "/IIS", &start,
&end, jsContentType.address())) {
return false;
}
nsDependentJSString contentType;
if (!contentType.init(aCx, jsContentType)) {
return false;
}
uint8_t optionalArgc = aArgc;
nsCOMPtr<nsIDOMBlob> rtnBlob;
if (NS_FAILED(blob->Slice(static_cast<uint64_t>(start),
static_cast<uint64_t>(end),
contentType, optionalArgc,
getter_AddRefs(rtnBlob)))) {
return Throw(aCx, NS_ERROR_DOM_FILE_NOT_READABLE_ERR);
}
JSObject* rtnObj = file::CreateBlob(aCx, rtnBlob);
if (!rtnObj) {
return false;
}
args.rval().setObject(*rtnObj);
return true;
}
};
const JSClass Blob::sClass = {
"Blob",
JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_DeletePropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, Finalize
};
const JSPropertySpec Blob::sProperties[] = {
JS_PSGS("size", GetSize, GetterOnlyJSNative, JSPROP_ENUMERATE),
JS_PSGS("type", GetType, GetterOnlyJSNative, JSPROP_ENUMERATE),
JS_PS_END
};
const JSFunctionSpec Blob::sFunctions[] = {
JS_FN("slice", Slice, 1, JSPROP_ENUMERATE),
JS_FS_END
};
class File : public Blob
{
// File should never be instantiated.
File();
~File();
static const JSClass sClass;
static const JSPropertySpec sProperties[];
public:
static JSObject*
InitClass(JSContext* aCx, JS::Handle<JSObject*> aObj, JS::Handle<JSObject*> aParentProto)
{
return JS_InitClass(aCx, aObj, aParentProto, &sClass, Construct, 0,
sProperties, nullptr, nullptr, nullptr);
}
static JSObject*
Create(JSContext* aCx, nsIDOMFile* aFile)
{
MOZ_ASSERT(SameCOMIdentity(static_cast<nsISupports*>(aFile), aFile));
JSObject* obj = JS_NewObject(aCx, &sClass, JS::NullPtr(), JS::NullPtr());
if (obj) {
JS_SetPrivate(obj, aFile);
NS_ADDREF(aFile);
}
return obj;
}
static nsIDOMFile*
GetPrivate(JSObject* aObj)
{
if (aObj) {
const JSClass* classPtr = JS_GetClass(aObj);
if (classPtr == &sClass) {
nsISupports* priv = static_cast<nsISupports*>(JS_GetPrivate(aObj));
nsCOMPtr<nsIDOMFile> file = do_QueryInterface(priv);
MOZ_ASSERT_IF(priv, file);
return file;
}
}
return nullptr;
}
static const JSClass*
Class()
{
return &sClass;
}
private:
static nsIDOMFile*
GetInstancePrivate(JSContext* aCx, JS::Handle<JSObject*> aObj, const char* aFunctionName)
{
nsIDOMFile* file = GetPrivate(aObj);
if (file) {
return file;
}
JS_ReportErrorNumber(aCx, js_GetErrorMessage, nullptr,
JSMSG_INCOMPATIBLE_PROTO, sClass.name, aFunctionName,
JS_GetClass(aObj)->name);
return nullptr;
}
static bool
Construct(JSContext* aCx, unsigned aArgc, jsval* aVp)
{
JS_ReportErrorNumber(aCx, js_GetErrorMessage, nullptr,
JSMSG_WRONG_CONSTRUCTOR,
sClass.name);
return false;
}
static void
Finalize(JSFreeOp* aFop, JSObject* aObj)
{
MOZ_ASSERT(JS_GetClass(aObj) == &sClass);
nsIDOMFile* file = GetPrivate(aObj);
NS_IF_RELEASE(file);
}
static bool
IsFile(JS::Handle<JS::Value> v)
{
return v.isObject() && GetPrivate(&v.toObject()) != nullptr;
}
static bool
GetMozFullPathImpl(JSContext* aCx, JS::CallArgs aArgs)
{
JS::Rooted<JSObject*> obj(aCx, &aArgs.thisv().toObject());
nsIDOMFile* file = GetInstancePrivate(aCx, obj, "mozFullPath");
MOZ_ASSERT(file);
nsString fullPath;
if (GetWorkerPrivateFromContext(aCx)->UsesSystemPrincipal() &&
NS_FAILED(file->GetMozFullPathInternal(fullPath))) {
return Throw(aCx, NS_ERROR_DOM_FILE_NOT_READABLE_ERR);
}
JSString* jsFullPath = JS_NewUCStringCopyN(aCx, fullPath.get(),
fullPath.Length());
if (!jsFullPath) {
return false;
}
aArgs.rval().setString(jsFullPath);
return true;
}
static bool
GetMozFullPath(JSContext* aCx, unsigned aArgc, JS::Value* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
return JS::CallNonGenericMethod<IsFile, GetMozFullPathImpl>(aCx, args);
}
static bool
GetNameImpl(JSContext* aCx, JS::CallArgs aArgs)
{
JS::Rooted<JSObject*> obj(aCx, &aArgs.thisv().toObject());
nsIDOMFile* file = GetInstancePrivate(aCx, obj, "name");
MOZ_ASSERT(file);
nsString name;
if (NS_FAILED(file->GetName(name))) {
name.Truncate();
}
JSString* jsName = JS_NewUCStringCopyN(aCx, name.get(), name.Length());
if (!jsName) {
return false;
}
aArgs.rval().setString(jsName);
return true;
}
static bool
GetName(JSContext* aCx, unsigned aArgc, JS::Value* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
return JS::CallNonGenericMethod<IsFile, GetNameImpl>(aCx, args);
}
static bool
GetPathImpl(JSContext* aCx, JS::CallArgs aArgs)
{
JS::Rooted<JSObject*> obj(aCx, &aArgs.thisv().toObject());
nsIDOMFile* file = GetInstancePrivate(aCx, obj, "path");
MOZ_ASSERT(file);
nsString path;
if (NS_FAILED(file->GetPath(path))) {
path.Truncate();
}
JSString* jsPath = JS_NewUCStringCopyN(aCx, path.get(), path.Length());
if (!jsPath) {
return false;
}
aArgs.rval().setString(jsPath);
return true;
}
static bool
GetPath(JSContext* aCx, unsigned aArgc, JS::Value* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
return JS::CallNonGenericMethod<IsFile, GetPathImpl>(aCx, args);
}
static bool
GetLastModifiedDateImpl(JSContext* aCx, JS::CallArgs aArgs)
{
JS::Rooted<JSObject*> obj(aCx, &aArgs.thisv().toObject());
nsIDOMFile* file = GetInstancePrivate(aCx, obj, "lastModifiedDate");
MOZ_ASSERT(file);
if (NS_FAILED(file->GetLastModifiedDate(aCx, aArgs.rval()))) {
return false;
}
return true;
}
static bool
GetLastModifiedDate(JSContext* aCx, unsigned aArgc, JS::Value* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
return JS::CallNonGenericMethod<IsFile, GetLastModifiedDateImpl>(aCx, args);
}
};
const JSClass File::sClass = {
"File",
JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_DeletePropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, Finalize
};
const JSPropertySpec File::sProperties[] = {
JS_PSGS("name", GetName, GetterOnlyJSNative, JSPROP_ENUMERATE),
JS_PSGS("path", GetPath, GetterOnlyJSNative, JSPROP_ENUMERATE),
JS_PSGS("lastModifiedDate", GetLastModifiedDate, GetterOnlyJSNative,
JSPROP_ENUMERATE),
JS_PSGS("mozFullPath", GetMozFullPath, GetterOnlyJSNative, JSPROP_ENUMERATE),
JS_PS_END
};
nsIDOMBlob*
Blob::GetPrivate(JSObject* aObj)
{
if (aObj) {
const JSClass* classPtr = JS_GetClass(aObj);
if (classPtr == &sClass || classPtr == File::Class()) {
nsISupports* priv = static_cast<nsISupports*>(JS_GetPrivate(aObj));
nsCOMPtr<nsIDOMBlob> blob = do_QueryInterface(priv);
MOZ_ASSERT_IF(priv, blob);
return blob;
}
}
return nullptr;
}
} // anonymous namespace
BEGIN_WORKERS_NAMESPACE
namespace file {
JSObject*
CreateBlob(JSContext* aCx, nsIDOMBlob* aBlob)
{
return Blob::Create(aCx, aBlob);
}
bool
InitClasses(JSContext* aCx, JS::Handle<JSObject*> aGlobal)
{
JS::Rooted<JSObject*> blobProto(aCx, Blob::InitClass(aCx, aGlobal));
return blobProto && File::InitClass(aCx, aGlobal, blobProto);
}
nsIDOMBlob*
GetDOMBlobFromJSObject(JSObject* aObj)
{
return Blob::GetPrivate(aObj);
}
JSObject*
CreateFile(JSContext* aCx, nsIDOMFile* aFile)
{
return File::Create(aCx, aFile);
}
nsIDOMFile*
GetDOMFileFromJSObject(JSObject* aObj)
{
return File::GetPrivate(aObj);
}
} // namespace file
END_WORKERS_NAMESPACE