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+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * 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/. */
+
+/* The long avoided variant support for xpcom. */
+
+#include "nsISupports.idl"
+
+%{C++
+#include "xptinfo.h"
+
+// This enum class used to be a const-only XPIDL interface, containing literal
+// integer descriptions of the different fields. Instead, it now directly
+// references the nsXPTTypeTag variants VTYPE_ are intended to match.
+struct nsIDataType
+{
+ enum {
+ // These MUST match the declarations in xptinfo.h.
+ // Otherwise the world is likely to explode.
+ VTYPE_INT8 = TD_INT8 ,
+ VTYPE_INT16 = TD_INT16 ,
+ VTYPE_INT32 = TD_INT32 ,
+ VTYPE_INT64 = TD_INT64 ,
+ VTYPE_UINT8 = TD_UINT8 ,
+ VTYPE_UINT16 = TD_UINT16 ,
+ VTYPE_UINT32 = TD_UINT32 ,
+ VTYPE_UINT64 = TD_UINT64 ,
+ VTYPE_FLOAT = TD_FLOAT ,
+ VTYPE_DOUBLE = TD_DOUBLE ,
+ VTYPE_BOOL = TD_BOOL ,
+ VTYPE_CHAR = TD_CHAR ,
+ VTYPE_WCHAR = TD_WCHAR ,
+ VTYPE_VOID = TD_VOID ,
+ VTYPE_ID = TD_NSIDPTR ,
+ VTYPE_CHAR_STR = TD_PSTRING ,
+ VTYPE_WCHAR_STR = TD_PWSTRING ,
+ VTYPE_INTERFACE = TD_INTERFACE_TYPE ,
+ VTYPE_INTERFACE_IS = TD_INTERFACE_IS_TYPE,
+ VTYPE_ARRAY = TD_LEGACY_ARRAY ,
+ VTYPE_STRING_SIZE_IS = TD_PSTRING_SIZE_IS ,
+ VTYPE_WSTRING_SIZE_IS = TD_PWSTRING_SIZE_IS ,
+ VTYPE_UTF8STRING = TD_UTF8STRING ,
+ VTYPE_CSTRING = TD_CSTRING ,
+ VTYPE_ASTRING = TD_ASTRING ,
+
+ // Non-xpt variant types
+ VTYPE_EMPTY_ARRAY = 254 ,
+ VTYPE_EMPTY = 255
+ };
+};
+%}
+
+
+/**
+ * XPConnect has magic to transparently convert between nsIVariant and JS types.
+ * We mark the interface [scriptable] so that JS can use methods
+ * that refer to this interface. But we mark all the methods and attributes
+ * [noscript] since any nsIVariant object will be automatically converted to a
+ * JS type anyway.
+ */
+
+[scriptable, builtinclass, uuid(81e4c2de-acac-4ad6-901a-b5fb1b851a0d)]
+interface nsIVariant : nsISupports
+{
+ [notxpcom,nostdcall] readonly attribute uint16_t dataType;
+
+ [noscript] uint8_t getAsInt8();
+ [noscript] int16_t getAsInt16();
+ [noscript] int32_t getAsInt32();
+ [noscript] int64_t getAsInt64();
+ [noscript] uint8_t getAsUint8();
+ [noscript] uint16_t getAsUint16();
+ [noscript] uint32_t getAsUint32();
+ [noscript] uint64_t getAsUint64();
+ [noscript] float getAsFloat();
+ [noscript] double getAsDouble();
+ [noscript] boolean getAsBool();
+ [noscript] char getAsChar();
+ [noscript] wchar getAsWChar();
+ [notxpcom] nsresult getAsID(out nsID retval);
+ [noscript] AString getAsAString();
+ [noscript] ACString getAsACString();
+ [noscript] AUTF8String getAsAUTF8String();
+ [noscript] string getAsString();
+ [noscript] wstring getAsWString();
+ [noscript] nsISupports getAsISupports();
+ [noscript] jsval getAsJSVal();
+
+ [noscript] void getAsInterface(out nsIIDPtr iid,
+ [iid_is(iid), retval] out nsQIResult iface);
+
+ [notxpcom] nsresult getAsArray(out uint16_t type, out nsIID iid,
+ out uint32_t count, out voidPtr ptr);
+
+ [noscript] void getAsStringWithSize(out uint32_t size,
+ [size_is(size), retval] out string str);
+
+ [noscript] void getAsWStringWithSize(out uint32_t size,
+ [size_is(size), retval] out wstring str);
+};
+
+/**
+ * An object that implements nsIVariant may or may NOT also implement this
+ * nsIWritableVariant.
+ *
+ * If the 'writable' attribute is false then attempts to call any of the 'set'
+ * methods can be expected to fail. Setting the 'writable' attribute may or
+ * may not succeed.
+ *
+ */
+
+[scriptable, builtinclass, uuid(5586a590-8c82-11d5-90f3-0010a4e73d9a)]
+interface nsIWritableVariant : nsIVariant
+{
+ attribute boolean writable;
+
+ void setAsInt8(in uint8_t aValue);
+ void setAsInt16(in int16_t aValue);
+ void setAsInt32(in int32_t aValue);
+ void setAsInt64(in int64_t aValue);
+ void setAsUint8(in uint8_t aValue);
+ void setAsUint16(in uint16_t aValue);
+ void setAsUint32(in uint32_t aValue);
+ void setAsUint64(in uint64_t aValue);
+ void setAsFloat(in float aValue);
+ void setAsDouble(in double aValue);
+ void setAsBool(in boolean aValue);
+ void setAsChar(in char aValue);
+ void setAsWChar(in wchar aValue);
+ void setAsID(in nsIDRef aValue);
+ void setAsAString(in AString aValue);
+ void setAsACString(in ACString aValue);
+ void setAsAUTF8String(in AUTF8String aValue);
+ void setAsString(in string aValue);
+ void setAsWString(in wstring aValue);
+ void setAsISupports(in nsISupports aValue);
+
+ void setAsInterface(in nsIIDRef iid,
+ [iid_is(iid)] in nsQIResult iface);
+
+ [noscript] void setAsArray(in uint16_t type, in nsIIDPtr iid,
+ in uint32_t count, in voidPtr ptr);
+
+ void setAsStringWithSize(in uint32_t size,
+ [size_is(size)] in string str);
+
+ void setAsWStringWithSize(in uint32_t size,
+ [size_is(size)] in wstring str);
+
+ void setAsVoid();
+ void setAsEmpty();
+ void setAsEmptyArray();
+
+ void setFromVariant(in nsIVariant aValue);
+};
+
+%{C++
+// The contractID for the generic implementation built in to xpcom.
+#define NS_VARIANT_CONTRACTID "@mozilla.org/variant;1"
+%}