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JSCValue.cpp
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2126 lines (1864 loc) · 78.9 KB
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/*
* Copyright (C) 2018 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "JSCValue.h"
#include "APICast.h"
#include "APIUtils.h"
#include "JSArrayBuffer.h"
#include "JSCCallbackFunction.h"
#include "JSCClassPrivate.h"
#include "JSCContextPrivate.h"
#include "JSCInlines.h"
#include "JSCValuePrivate.h"
#include "JSRetainPtr.h"
#include "JSTypedArray.h"
#include "LiteralParser.h"
#include "OpaqueJSString.h"
#include "TypedArrayType.h"
#include <gobject/gvaluecollector.h>
#include <wtf/glib/GRefPtr.h>
#include <wtf/glib/GUniquePtr.h>
#include <wtf/glib/WTFGType.h>
/**
* JSCValue:
* @short_description: JavaScript value
* @title: JSCValue
* @see_also: JSCContext
*
* JSCValue represents a reference to a value in a #JSCContext. The JSCValue
* protects the referenced value from being garbage collected.
*/
enum {
PROP_0,
PROP_CONTEXT,
};
struct _JSCValuePrivate {
GRefPtr<JSCContext> context;
JSValueRef jsValue;
};
WEBKIT_DEFINE_FINAL_TYPE(JSCValue, jsc_value, G_TYPE_OBJECT, GObject)
static void jscValueGetProperty(GObject* object, guint propID, GValue* value, GParamSpec* paramSpec)
{
JSCValuePrivate* priv = JSC_VALUE(object)->priv;
switch (propID) {
case PROP_CONTEXT:
g_value_set_object(value, priv->context.get());
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, propID, paramSpec);
}
}
static void jscValueSetProperty(GObject* object, guint propID, const GValue* value, GParamSpec* paramSpec)
{
JSCValuePrivate* priv = JSC_VALUE(object)->priv;
switch (propID) {
case PROP_CONTEXT:
priv->context = JSC_CONTEXT(g_value_get_object(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, propID, paramSpec);
}
}
static void jscValueDispose(GObject* object)
{
JSCValuePrivate* priv = JSC_VALUE(object)->priv;
if (priv->context) {
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueUnprotect(jsContext, priv->jsValue);
jscContextValueDestroyed(priv->context.get(), priv->jsValue);
priv->jsValue = nullptr;
priv->context = nullptr;
}
G_OBJECT_CLASS(jsc_value_parent_class)->dispose(object);
}
static void jsc_value_class_init(JSCValueClass* klass)
{
GObjectClass* objClass = G_OBJECT_CLASS(klass);
objClass->get_property = jscValueGetProperty;
objClass->set_property = jscValueSetProperty;
objClass->dispose = jscValueDispose;
/**
* JSCValue:context:
*
* The #JSCContext in which the value was created.
*/
g_object_class_install_property(objClass,
PROP_CONTEXT,
g_param_spec_object(
"context",
nullptr, nullptr,
JSC_TYPE_CONTEXT,
static_cast<GParamFlags>(WEBKIT_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)));
}
JSValueRef jscValueGetJSValue(JSCValue* value)
{
return value->priv->jsValue;
}
JSCValue* jscValueCreate(JSCContext* context, JSValueRef jsValue)
{
auto* value = JSC_VALUE(g_object_new(JSC_TYPE_VALUE, "context", context, nullptr));
JSValueProtect(jscContextGetJSContext(context), jsValue);
value->priv->jsValue = jsValue;
return value;
}
/**
* jsc_value_get_context:
* @value: a #JSCValue
*
* Get the #JSCContext in which @value was created.
*
* Returns: (transfer none): the #JSCValue context.
*/
JSCContext* jsc_value_get_context(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
return value->priv->context.get();
}
/**
* jsc_value_new_undefined:
* @context: a #JSCContext
*
* Create a new #JSCValue referencing <function>undefined</function> in @context.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_undefined(JSCContext* context)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
return jscContextGetOrCreateValue(context, JSValueMakeUndefined(jscContextGetJSContext(context))).leakRef();
}
/**
* jsc_value_is_undefined:
* @value: a #JSCValue
*
* Get whether the value referenced by @value is <function>undefined</function>.
*
* Returns: whether the value is undefined.
*/
gboolean jsc_value_is_undefined(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueIsUndefined(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_new_null:
* @context: a #JSCContext
*
* Create a new #JSCValue referencing <function>null</function> in @context.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_null(JSCContext* context)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
return jscContextGetOrCreateValue(context, JSValueMakeNull(jscContextGetJSContext(context))).leakRef();
}
/**
* jsc_value_is_null:
* @value: a #JSCValue
*
* Get whether the value referenced by @value is <function>null</function>.
*
* Returns: whether the value is null.
*/
gboolean jsc_value_is_null(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueIsNull(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_new_number:
* @context: a #JSCContext
* @number: a number
*
* Create a new #JSCValue from @number.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_number(JSCContext* context, double number)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
return jscContextGetOrCreateValue(context, JSValueMakeNumber(jscContextGetJSContext(context), number)).leakRef();
}
/**
* jsc_value_is_number:
* @value: a #JSCValue
*
* Get whether the value referenced by @value is a number.
*
* Returns: whether the value is a number.
*/
gboolean jsc_value_is_number(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueIsNumber(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_to_double:
* @value: a #JSCValue
*
* Convert @value to a double.
*
* Returns: a #gdouble result of the conversion.
*/
double jsc_value_to_double(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), std::numeric_limits<double>::quiet_NaN());
JSCValuePrivate* priv = value->priv;
JSValueRef exception = nullptr;
auto result = JSValueToNumber(jscContextGetJSContext(priv->context.get()), priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return std::numeric_limits<double>::quiet_NaN();
return result;
}
/**
* jsc_value_to_int32:
* @value: a #JSCValue
*
* Convert @value to a #gint32.
*
* Returns: a #gint32 result of the conversion.
*/
gint32 jsc_value_to_int32(JSCValue* value)
{
return JSC::toInt32(jsc_value_to_double(value));
}
/**
* jsc_value_new_boolean:
* @context: a #JSCContext
* @value: a #gboolean
*
* Create a new #JSCValue from @value
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_boolean(JSCContext* context, gboolean value)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
return jscContextGetOrCreateValue(context, JSValueMakeBoolean(jscContextGetJSContext(context), value)).leakRef();
}
/**
* jsc_value_is_boolean:
* @value: a #JSCValue
*
* Get whether the value referenced by @value is a boolean.
*
* Returns: whether the value is a boolean.
*/
gboolean jsc_value_is_boolean(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueIsBoolean(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_to_boolean:
* @value: a #JSCValue
*
* Convert @value to a boolean.
*
* Returns: a #gboolean result of the conversion.
*/
gboolean jsc_value_to_boolean(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueToBoolean(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_new_string:
* @context: a #JSCContext
* @string: (nullable): a null-terminated string
*
* Create a new #JSCValue from @string. If you need to create a #JSCValue from a
* string containing null characters, use jsc_value_new_string_from_bytes() instead.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_string(JSCContext* context, const char* string)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
JSValueRef jsStringValue;
if (string) {
JSRetainPtr<JSStringRef> jsString(Adopt, JSStringCreateWithUTF8CString(string));
jsStringValue = JSValueMakeString(jscContextGetJSContext(context), jsString.get());
} else
jsStringValue = JSValueMakeString(jscContextGetJSContext(context), nullptr);
return jscContextGetOrCreateValue(context, jsStringValue).leakRef();
}
/**
* jsc_value_new_string_from_bytes:
* @context: a #JSCContext
* @bytes: (nullable): a #GBytes
*
* Create a new #JSCValue from @bytes.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_string_from_bytes(JSCContext* context, GBytes* bytes)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
if (!bytes)
return jsc_value_new_string(context, nullptr);
gsize dataSize;
const auto* data = static_cast<const char*>(g_bytes_get_data(bytes, &dataSize));
auto string = String::fromUTF8(data, dataSize);
JSRetainPtr<JSStringRef> jsString(Adopt, OpaqueJSString::tryCreate(WTFMove(string)).leakRef());
return jscContextGetOrCreateValue(context, JSValueMakeString(jscContextGetJSContext(context), jsString.get())).leakRef();
}
/**
* jsc_value_is_string:
* @value: a #JSCValue
*
* Get whether the value referenced by @value is a string
*
* Returns: whether the value is a string
*/
gboolean jsc_value_is_string(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueIsString(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_to_string:
* @value: a #JSCValue
*
* Convert @value to a string. Use jsc_value_to_string_as_bytes() instead, if you need to
* handle strings containing null characters.
*
* Returns: (transfer full): a null-terminated string result of the conversion.
*/
char* jsc_value_to_string(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
JSCValuePrivate* priv = value->priv;
JSValueRef exception = nullptr;
JSRetainPtr<JSStringRef> jsString(Adopt, JSValueToStringCopy(jscContextGetJSContext(priv->context.get()), priv->jsValue, &exception));
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return nullptr;
if (!jsString)
return nullptr;
size_t maxSize = JSStringGetMaximumUTF8CStringSize(jsString.get());
auto* string = static_cast<char*>(g_malloc(maxSize));
if (!JSStringGetUTF8CString(jsString.get(), string, maxSize)) {
g_free(string);
return nullptr;
}
return string;
}
/**
* jsc_value_to_string_as_bytes:
* @value: a #JSCValue
*
* Convert @value to a string and return the results as #GBytes. This is needed
* to handle strings with null characters.
*
* Returns: (transfer full): a #GBytes with the result of the conversion.
*/
GBytes* jsc_value_to_string_as_bytes(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
JSCValuePrivate* priv = value->priv;
JSValueRef exception = nullptr;
JSRetainPtr<JSStringRef> jsString(Adopt, JSValueToStringCopy(jscContextGetJSContext(priv->context.get()), priv->jsValue, &exception));
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return nullptr;
if (!jsString)
return nullptr;
size_t maxSize = JSStringGetMaximumUTF8CStringSize(jsString.get());
if (maxSize == 1)
return g_bytes_new_static("", 0);
auto* string = static_cast<char*>(fastMalloc(maxSize));
auto stringSize = JSStringGetUTF8CString(jsString.get(), string, maxSize);
if (!stringSize) {
fastFree(string);
return nullptr;
}
// Ignore the null character added by JSStringGetUTF8CString.
return g_bytes_new_with_free_func(string, stringSize - 1, fastFree, string);
}
/**
* jsc_value_new_array: (skip)
* @context: a #JSCContext
* @first_item_type: #GType of first item, or %G_TYPE_NONE
* @...: value of the first item, followed optionally by more type/value pairs, followed by %G_TYPE_NONE.
*
* Create a new #JSCValue referencing an array with the given items. If @first_item_type
* is %G_TYPE_NONE an empty array is created.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_array(JSCContext* context, GType firstItemType, ...)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
auto* jsContext = jscContextGetJSContext(context);
JSC::JSGlobalObject* globalObject = toJS(jsContext);
JSC::JSLockHolder locker(globalObject);
JSValueRef exception = nullptr;
auto* jsArray = JSObjectMakeArray(jsContext, 0, nullptr, &exception);
if (jscContextHandleExceptionIfNeeded(context, exception))
return nullptr;
auto* jsArrayObject = JSValueToObject(jsContext, jsArray, &exception);
if (jscContextHandleExceptionIfNeeded(context, exception))
return nullptr;
unsigned index = 0;
va_list args;
va_start(args, firstItemType);
GType itemType = firstItemType;
while (itemType != G_TYPE_NONE) {
GValue item;
GUniqueOutPtr<char> error;
G_VALUE_COLLECT_INIT(&item, itemType, args, G_VALUE_NOCOPY_CONTENTS, &error.outPtr());
if (error) {
exception = toRef(JSC::createTypeError(globalObject, makeString("failed to collect array item: "_s, error.get())));
jscContextHandleExceptionIfNeeded(context, exception);
jsArray = nullptr;
break;
}
auto* jsValue = jscContextGValueToJSValue(context, &item, &exception);
g_value_unset(&item);
if (jscContextHandleExceptionIfNeeded(context, exception)) {
jsArray = nullptr;
break;
}
JSObjectSetPropertyAtIndex(jsContext, jsArrayObject, index, jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(context, exception)) {
jsArray = nullptr;
break;
}
itemType = va_arg(args, GType);
index++;
}
va_end(args);
return jsArray ? jscContextGetOrCreateValue(context, jsArray).leakRef() : nullptr;
}
/**
* jsc_value_new_array_from_garray:
* @context: a #JSCContext
* @array: (nullable) (element-type JSCValue): a #GPtrArray
*
* Create a new #JSCValue referencing an array with the items from @array. If @array
* is %NULL or empty a new empty array will be created. Elements of @array should be
* pointers to a #JSCValue.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_array_from_garray(JSCContext* context, GPtrArray* gArray)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
if (!gArray || !gArray->len)
return jsc_value_new_array(context, G_TYPE_NONE);
JSValueRef exception = nullptr;
auto* jsArray = jscContextGArrayToJSArray(context, gArray, &exception);
if (jscContextHandleExceptionIfNeeded(context, exception))
return nullptr;
return jscContextGetOrCreateValue(context, jsArray).leakRef();
}
/**
* jsc_value_new_array_from_strv:
* @context: a #JSCContext
* @strv: (array zero-terminated=1) (element-type utf8): a %NULL-terminated array of strings
*
* Create a new #JSCValue referencing an array of strings with the items from @strv. If @array
* is %NULL or empty a new empty array will be created.
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_array_from_strv(JSCContext* context, const char* const* strv)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
auto strvLength = strv ? g_strv_length(const_cast<char**>(strv)) : 0;
if (!strvLength)
return jsc_value_new_array(context, G_TYPE_NONE);
GRefPtr<GPtrArray> gArray = adoptGRef(g_ptr_array_new_full(strvLength, g_object_unref));
for (unsigned i = 0; i < strvLength; i++)
g_ptr_array_add(gArray.get(), jsc_value_new_string(context, strv[i]));
return jsc_value_new_array_from_garray(context, gArray.get());
}
/**
* jsc_value_is_array:
* @value: a #JSCValue
*
* Get whether the value referenced by @value is an array.
*
* Returns: whether the value is an array.
*/
gboolean jsc_value_is_array(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueIsArray(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_new_object:
* @context: a #JSCContext
* @instance: (nullable) (transfer full): an object instance or %NULL
* @jsc_class: (nullable): the #JSCClass of @instance
*
* Create a new #JSCValue from @instance. If @instance is %NULL a new empty object is created.
* When @instance is provided, @jsc_class must be provided too. @jsc_class takes ownership of
* @instance that will be freed by the #GDestroyNotify passed to jsc_context_register_class().
*
* Returns: (transfer full): a #JSCValue.
*/
JSCValue* jsc_value_new_object(JSCContext* context, gpointer instance, JSCClass* jscClass)
{
g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);
g_return_val_if_fail(!instance || JSC_IS_CLASS(jscClass), nullptr);
return jscContextGetOrCreateValue(context, instance ? toRef(jscClassGetOrCreateJSWrapper(jscClass, context, instance)) : JSObjectMake(jscContextGetJSContext(context), nullptr, nullptr)).leakRef();
}
/**
* jsc_value_is_object:
* @value: a #JSCValue
*
* Get whether the value referenced by @value is an object.
*
* Returns: whether the value is an object.
*/
gboolean jsc_value_is_object(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
JSCValuePrivate* priv = value->priv;
return JSValueIsObject(jscContextGetJSContext(priv->context.get()), priv->jsValue);
}
/**
* jsc_value_object_is_instance_of:
* @value: a #JSCValue
* @name: a class name
*
* Get whether the value referenced by @value is an instance of class @name.
*
* Returns: whether the value is an object instance of class @name.
*/
gboolean jsc_value_object_is_instance_of(JSCValue* value, const char* name)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
g_return_val_if_fail(name, FALSE);
JSCValuePrivate* priv = value->priv;
// We use evaluate here and not get_value because classes are not necessarily a property of the global object.
// http://www.ecma-international.org/ecma-262/6.0/index.html#sec-global-environment-records
GRefPtr<JSCValue> constructor = adoptGRef(jsc_context_evaluate(priv->context.get(), name, -1));
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, constructor->priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return FALSE;
gboolean returnValue = JSValueIsInstanceOfConstructor(jsContext, priv->jsValue, object, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return FALSE;
return returnValue;
}
/**
* jsc_value_object_set_property:
* @value: a #JSCValue
* @name: the property name
* @property: the #JSCValue to set
*
* Set @property with @name on @value.
*/
void jsc_value_object_set_property(JSCValue* value, const char* name, JSCValue* property)
{
g_return_if_fail(JSC_IS_VALUE(value));
g_return_if_fail(name);
g_return_if_fail(JSC_IS_VALUE(property));
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return;
JSRetainPtr<JSStringRef> propertyName(Adopt, JSStringCreateWithUTF8CString(name));
JSObjectSetProperty(jsContext, object, propertyName.get(), property->priv->jsValue, kJSPropertyAttributeNone, &exception);
jscContextHandleExceptionIfNeeded(priv->context.get(), exception);
}
/**
* jsc_value_object_get_property:
* @value: a #JSCValue
* @name: the property name
*
* Get property with @name from @value.
*
* Returns: (transfer full): the property #JSCValue.
*/
JSCValue* jsc_value_object_get_property(JSCValue* value, const char* name)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
g_return_val_if_fail(name, nullptr);
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
JSRetainPtr<JSStringRef> propertyName(Adopt, JSStringCreateWithUTF8CString(name));
JSValueRef result = JSObjectGetProperty(jsContext, object, propertyName.get(), &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
return jscContextGetOrCreateValue(priv->context.get(), result).leakRef();
}
/**
* jsc_value_object_set_property_at_index:
* @value: a #JSCValue
* @index: the property index
* @property: the #JSCValue to set
*
* Set @property at @index on @value.
*/
void jsc_value_object_set_property_at_index(JSCValue* value, unsigned index, JSCValue* property)
{
g_return_if_fail(JSC_IS_VALUE(value));
g_return_if_fail(JSC_IS_VALUE(property));
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return;
JSObjectSetPropertyAtIndex(jsContext, object, index, property->priv->jsValue, &exception);
jscContextHandleExceptionIfNeeded(priv->context.get(), exception);
}
/**
* jsc_value_object_get_property_at_index:
* @value: a #JSCValue
* @index: the property index
*
* Get property at @index from @value.
*
* Returns: (transfer full): the property #JSCValue.
*/
JSCValue* jsc_value_object_get_property_at_index(JSCValue* value, unsigned index)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
JSValueRef result = JSObjectGetPropertyAtIndex(jsContext, object, index, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
return jscContextGetOrCreateValue(priv->context.get(), result).leakRef();
}
/**
* jsc_value_object_has_property:
* @value: a #JSCValue
* @name: the property name
*
* Get whether @value has property with @name.
*
* Returns: %TRUE if @value has a property with @name, or %FALSE otherwise
*/
gboolean jsc_value_object_has_property(JSCValue* value, const char* name)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
g_return_val_if_fail(name, FALSE);
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return FALSE;
JSRetainPtr<JSStringRef> propertyName(Adopt, JSStringCreateWithUTF8CString(name));
return JSObjectHasProperty(jsContext, object, propertyName.get());
}
/**
* jsc_value_object_delete_property:
* @value: a #JSCValue
* @name: the property name
*
* Try to delete property with @name from @value. This function will return %FALSE if
* the property was defined without %JSC_VALUE_PROPERTY_CONFIGURABLE flag.
*
* Returns: %TRUE if the property was deleted, or %FALSE otherwise.
*/
gboolean jsc_value_object_delete_property(JSCValue* value, const char* name)
{
g_return_val_if_fail(JSC_IS_VALUE(value), FALSE);
g_return_val_if_fail(name, FALSE);
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return FALSE;
JSRetainPtr<JSStringRef> propertyName(Adopt, JSStringCreateWithUTF8CString(name));
gboolean result = JSObjectDeleteProperty(jsContext, object, propertyName.get(), &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return FALSE;
return result;
}
/**
* jsc_value_object_enumerate_properties:
* @value: a #JSCValue
*
* Get the list of property names of @value. Only properties defined with %JSC_VALUE_PROPERTY_ENUMERABLE
* flag will be collected.
*
* Returns: (array zero-terminated=1) (transfer full) (nullable): a %NULL-terminated array of strings containing the
* property names, or %NULL if @value doesn't have enumerable properties. Use g_strfreev() to free.
*/
char** jsc_value_object_enumerate_properties(JSCValue* value)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return nullptr;
auto* propertiesArray = JSObjectCopyPropertyNames(jsContext, object);
if (!propertiesArray)
return nullptr;
auto propertiesArraySize = JSPropertyNameArrayGetCount(propertiesArray);
if (!propertiesArraySize) {
JSPropertyNameArrayRelease(propertiesArray);
return nullptr;
}
auto* result = static_cast<char**>(g_new0(char*, propertiesArraySize + 1));
for (unsigned i = 0; i < propertiesArraySize; ++i) {
auto* jsString = JSPropertyNameArrayGetNameAtIndex(propertiesArray, i);
size_t maxSize = JSStringGetMaximumUTF8CStringSize(jsString);
auto* string = static_cast<char*>(g_malloc(maxSize));
JSStringGetUTF8CString(jsString, string, maxSize);
result[i] = string;
}
JSPropertyNameArrayRelease(propertiesArray);
return result;
}
static JSValueRef jsObjectCall(JSGlobalContextRef jsContext, JSObjectRef function, JSC::JSCCallbackFunction::Type functionType, JSObjectRef thisObject, const Vector<JSValueRef>& arguments, JSValueRef* exception)
{
switch (functionType) {
case JSC::JSCCallbackFunction::Type::Constructor:
return JSObjectCallAsConstructor(jsContext, function, arguments.size(), arguments.data(), exception);
case JSC::JSCCallbackFunction::Type::Method:
ASSERT(thisObject);
FALLTHROUGH;
case JSC::JSCCallbackFunction::Type::Function:
return JSObjectCallAsFunction(jsContext, function, thisObject, arguments.size(), arguments.data(), exception);
}
RELEASE_ASSERT_NOT_REACHED();
}
static GRefPtr<JSCValue> jscValueCallFunction(JSCValue* value, JSObjectRef function, JSC::JSCCallbackFunction::Type functionType, JSObjectRef thisObject, GType firstParameterType, va_list args)
{
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSC::JSGlobalObject* globalObject = toJS(jsContext);
JSC::JSLockHolder locker(globalObject);
JSValueRef exception = nullptr;
Vector<JSValueRef> arguments;
GType parameterType = firstParameterType;
while (parameterType != G_TYPE_NONE) {
GValue parameter;
GUniqueOutPtr<char> error;
G_VALUE_COLLECT_INIT(¶meter, parameterType, args, G_VALUE_NOCOPY_CONTENTS, &error.outPtr());
if (error) {
exception = toRef(JSC::createTypeError(globalObject, makeString("failed to collect function paramater: "_s, error.get())));
jscContextHandleExceptionIfNeeded(priv->context.get(), exception);
return adoptGRef(jsc_value_new_undefined(priv->context.get()));
}
auto* jsValue = jscContextGValueToJSValue(priv->context.get(), ¶meter, &exception);
g_value_unset(¶meter);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jscContextGetOrCreateValue(priv->context.get(), jsValue);
arguments.append(jsValue);
parameterType = va_arg(args, GType);
}
auto result = jsObjectCall(jsContext, function, functionType, thisObject, arguments, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return adoptGRef(jsc_value_new_undefined(priv->context.get()));
return jscContextGetOrCreateValue(priv->context.get(), result);
}
/**
* jsc_value_object_invoke_method: (skip)
* @value: a #JSCValue
* @name: the method name
* @first_parameter_type: #GType of first parameter, or %G_TYPE_NONE
* @...: value of the first parameter, followed optionally by more type/value pairs, followed by %G_TYPE_NONE
*
* Invoke method with @name on object referenced by @value, passing the given parameters. If
* @first_parameter_type is %G_TYPE_NONE no parameters will be passed to the method.
* The object instance will be handled automatically even when the method is a custom one
* registered with jsc_class_add_method(), so it should never be passed explicitly as parameter
* of this function.
*
* This function always returns a #JSCValue, in case of void methods a #JSCValue referencing
* <function>undefined</function> is returned.
*
* Returns: (transfer full): a #JSCValue with the return value of the method.
*/
JSCValue* jsc_value_object_invoke_method(JSCValue* value, const char* name, GType firstParameterType, ...)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
g_return_val_if_fail(name, nullptr);
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
JSRetainPtr<JSStringRef> methodName(Adopt, JSStringCreateWithUTF8CString(name));
JSValueRef functionValue = JSObjectGetProperty(jsContext, object, methodName.get(), &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
JSObjectRef function = JSValueToObject(jsContext, functionValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
va_list args;
va_start(args, firstParameterType);
auto result = jscValueCallFunction(value, function, JSC::JSCCallbackFunction::Type::Method, object, firstParameterType, args);
va_end(args);
return result.leakRef();
}
/**
* jsc_value_object_invoke_methodv: (rename-to jsc_value_object_invoke_method)
* @value: a #JSCValue
* @name: the method name
* @n_parameters: the number of parameters
* @parameters: (nullable) (array length=n_parameters) (element-type JSCValue): the #JSCValue<!-- -->s to pass as parameters to the method, or %NULL
*
* Invoke method with @name on object referenced by @value, passing the given @parameters. If
* @n_parameters is 0 no parameters will be passed to the method.
* The object instance will be handled automatically even when the method is a custom one
* registered with jsc_class_add_method(), so it should never be passed explicitly as parameter
* of this function.
*
* This function always returns a #JSCValue, in case of void methods a #JSCValue referencing
* <function>undefined</function> is returned.
*
* Returns: (transfer full): a #JSCValue with the return value of the method.
*/
JSCValue* jsc_value_object_invoke_methodv(JSCValue* value, const char* name, unsigned parametersCount, JSCValue** parameters)
{
g_return_val_if_fail(JSC_IS_VALUE(value), nullptr);
g_return_val_if_fail(name, nullptr);
g_return_val_if_fail(!parametersCount || parameters, nullptr);
JSCValuePrivate* priv = value->priv;
auto* jsContext = jscContextGetJSContext(priv->context.get());
JSValueRef exception = nullptr;
JSObjectRef object = JSValueToObject(jsContext, priv->jsValue, &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
JSRetainPtr<JSStringRef> methodName(Adopt, JSStringCreateWithUTF8CString(name));
JSValueRef functionValue = JSObjectGetProperty(jsContext, object, methodName.get(), &exception);
if (jscContextHandleExceptionIfNeeded(priv->context.get(), exception))
return jsc_value_new_undefined(priv->context.get());
JSObjectRef function = JSValueToObject(jsContext, functionValue, &exception);