gecko/tools/profiler/JSObjectBuilder.h
2012-05-21 12:12:37 +01:00

134 lines
3.1 KiB
C++

/* -*- 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 "jsapi.h"
/* this is handy wrapper around JSAPI to make it more pleasant to use.
* We collect the JSAPI errors and so that callers don't need to */
class JSObjectBuilder
{
public:
void DefineProperty(JSObject *aObject, const char *name, JSObject *aValue)
{
if (!mOk)
return;
mOk = JS_DefineProperty(mCx, aObject, name, OBJECT_TO_JSVAL(aValue), NULL, NULL, JSPROP_ENUMERATE);
}
void DefineProperty(JSObject *aObject, const char *name, int value)
{
if (!mOk)
return;
mOk = JS_DefineProperty(mCx, aObject, name, INT_TO_JSVAL(value), NULL, NULL, JSPROP_ENUMERATE);
}
void DefineProperty(JSObject *aObject, const char *name, double value)
{
if (!mOk)
return;
mOk = JS_DefineProperty(mCx, aObject, name, DOUBLE_TO_JSVAL(value), NULL, NULL, JSPROP_ENUMERATE);
}
void DefineProperty(JSObject *aObject, const char *name, nsAString &value)
{
if (!mOk)
return;
const nsString &flat = PromiseFlatString(value);
JSString *string = JS_NewUCStringCopyN(mCx, static_cast<const jschar*>(flat.get()), flat.Length());
if (!string)
mOk = JS_FALSE;
if (!mOk)
return;
mOk = JS_DefineProperty(mCx, aObject, name, STRING_TO_JSVAL(string), NULL, NULL, JSPROP_ENUMERATE);
}
void DefineProperty(JSObject *aObject, const char *name, const char *value, size_t valueLength)
{
if (!mOk)
return;
JSString *string = JS_NewStringCopyN(mCx, value, valueLength);
if (!string) {
mOk = JS_FALSE;
return;
}
mOk = JS_DefineProperty(mCx, aObject, name, STRING_TO_JSVAL(string), NULL, NULL, JSPROP_ENUMERATE);
}
void DefineProperty(JSObject *aObject, const char *name, const char *value)
{
DefineProperty(aObject, name, value, strlen(value));
}
void ArrayPush(JSObject *aArray, int value)
{
if (!mOk)
return;
jsval objval = INT_TO_JSVAL(value);
uint32_t length;
mOk = JS_GetArrayLength(mCx, aArray, &length);
if (!mOk)
return;
mOk = JS_SetElement(mCx, aArray, length, &objval);
}
void ArrayPush(JSObject *aArray, JSObject *aObject)
{
if (!mOk)
return;
jsval objval = OBJECT_TO_JSVAL(aObject);
uint32_t length;
mOk = JS_GetArrayLength(mCx, aArray, &length);
if (!mOk)
return;
mOk = JS_SetElement(mCx, aArray, length, &objval);
}
JSObject *CreateArray() {
JSObject *array = JS_NewArrayObject(mCx, 0, NULL);
if (!array)
mOk = JS_FALSE;
return array;
}
JSObject *CreateObject() {
JSObject *obj = JS_NewObject(mCx, NULL, NULL, NULL);
if (!obj)
mOk = JS_FALSE;
return obj;
}
// We need to ensure that this object lives on the stack so that GC sees it properly
JSObjectBuilder(JSContext *aCx) : mCx(aCx), mOk(JS_TRUE)
{
}
private:
JSObjectBuilder(JSObjectBuilder&);
JSContext *mCx;
JSObject *mObj;
JSBool mOk;
};