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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/**
+ * A sample of XPConnect. This file is the header of an implementation
+ * nsSample of the nsISample interface.
+ *
+ */
+
+#include "nsISample.h"
+
+/**
+ * SampleImpl is an implementation of the nsISample interface. In XPCOM,
+ * there can be more than one implementation of an given interface. Class
+ * IDs (CIDs) uniquely identify a particular implementation of an interface.
+ * Interface IDs (IIDs) uniquely identify an interface.
+ *
+ * The CID is also a unique number that looks just like an IID
+ * and uniquely identifies an implementation
+ * {7CB5B7A0-07D7-11d3-BDE2-000064657374}
+ */
+
+#define NS_SAMPLE_CID \
+{ 0x7cb5b7a0, 0x7d7, 0x11d3, { 0xbd, 0xe2, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74 } }
+
+#define NS_SAMPLE_CONTRACTID "@mozilla.org/sample;1"
+
+
+class nsSampleImpl : public nsISample
+{
+public:
+ nsSampleImpl();
+
+ /**
+ * This macro expands into a declaration of the nsISupports interface.
+ * Every XPCOM component needs to implement nsISupports, as it acts
+ * as the gateway to other interfaces this component implements. You
+ * could manually declare QueryInterface, AddRef, and Release instead
+ * of using this macro, but why?
+ */
+ // nsISupports interface
+ NS_DECL_ISUPPORTS
+
+ /**
+ * This macro is defined in the nsISample.h file, and is generated
+ * automatically by the xpidl compiler. It expands to
+ * declarations of all of the methods required to implement the
+ * interface. xpidl will generate a NS_DECL_[INTERFACENAME] macro
+ * for each interface that it processes.
+ *
+ * The methods of nsISample are discussed individually below, but
+ * commented out (because this macro already defines them.)
+ */
+ NS_DECL_NSISAMPLE
+
+ /**
+ * The following is an explanation of how the interface header
+ * file expands to for a c++ implementation. NS_DELC_NSISAMPLE
+ * takes care of defining the right c++ implementation.
+ *
+ * The following if provided for more understanding.
+ *
+ * NS_IMETHOD expands to the standard XPCOM return type. XPCOM methods
+ * should never return any other type. The return value is used
+ * behind the scenes by the XPConnect runtime to figure out if the call
+ * failed in any way.
+ * These methods were generated by "attribute string Value" in
+ * nsISample.idl. When reflected into JavaScript, XPCOM will use these
+ * calls as Getter/Setter ops, so that they can be called transparently
+ * as "sample.Value='foo';" and "var val = sample.Value"
+ */
+ /* NS_IMETHOD GetValue(char * *aValue); */
+ /* NS_IMETHOD SetValue(char * aValue); */
+
+ /**
+ * The const came from the "in" specifier in nsISample.idl. "in"
+ * specifies that the value of this parameter is used only for input,
+ * this method is not allowed to modify the contents of the buffer.
+ */
+ /* NS_IMETHOD WriteValue(const char *aPrefix); */
+
+ /**
+ * nsISample.idl specifies all of it's string types as string, instead
+ * of wstring (wide string), the Unicode type. If the world were a
+ * perfect place, all normal strings in XPCOM interfaces would be unicode.
+ * If this type had been specified as wstring, it would appear as
+ * PRUnichar * in C++, which is the NSPR type for unicode characters.
+ */
+ /* NS_IMETHOD Poke(const char* aValue); */
+
+private:
+ ~nsSampleImpl();
+
+ char* mValue;
+};