--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/browser/HelperAppLauncherDialog.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,233 @@
+/*******************************************************************************
+ * Copyright (c) 2003, 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+module dwt.browser.HelperAppLauncherDialog;
+
+import dwt.dwthelper.utils;
+
+import dwt.DWT;
+import dwt.internal.C;
+import dwt.internal.mozilla.XPCOM;
+import dwt.internal.mozilla.XPCOMObject;
+import dwt.internal.mozilla.nsEmbedString;
+import dwt.internal.mozilla.nsID;
+import dwt.internal.mozilla.nsIHelperAppLauncher;
+import dwt.internal.mozilla.nsIHelperAppLauncherDialog;
+import dwt.internal.mozilla.nsIHelperAppLauncher_1_8;
+import dwt.internal.mozilla.nsIHelperAppLauncher_1_9;
+import dwt.internal.mozilla.nsISupports;
+import dwt.widgets.FileDialog;
+import dwt.widgets.Shell;
+
+class HelperAppLauncherDialog {
+    XPCOMObject supports;
+    XPCOMObject helperAppLauncherDialog;
+    int refCount = 0;
+
+HelperAppLauncherDialog () {
+    createCOMInterfaces ();
+}
+
+int AddRef () {
+    refCount++;
+    return refCount;
+}
+
+void createCOMInterfaces () {
+    /* Create each of the interfaces that this object implements */
+    supports = new XPCOMObject (new int[] {2, 0, 0}) {
+        public int /*long*/ method0 (int /*long*/[] args) {return QueryInterface (args[0], args[1]);}
+        public int /*long*/ method1 (int /*long*/[] args) {return AddRef ();}
+        public int /*long*/ method2 (int /*long*/[] args) {return Release ();}
+    };
+    
+    helperAppLauncherDialog = new XPCOMObject (new int[] {2, 0, 0, 3, 5}) {
+        public int /*long*/ method0 (int /*long*/[] args) {return QueryInterface (args[0], args[1]);}
+        public int /*long*/ method1 (int /*long*/[] args) {return AddRef ();}
+        public int /*long*/ method2 (int /*long*/[] args) {return Release ();}
+        public int /*long*/ method3 (int /*long*/[] args) {return Show (args[0], args[1], (int)/*64*/args[2]);}
+        public int /*long*/ method4 (int /*long*/[] args) {return PromptForSaveToFile (args[0], args[1], args[2], args[3], args[4]);}
+    };      
+}
+
+void disposeCOMInterfaces () {
+    if (supports !is null) {
+        supports.dispose ();
+        supports = null;
+    }   
+    if (helperAppLauncherDialog !is null) {
+        helperAppLauncherDialog.dispose ();
+        helperAppLauncherDialog = null; 
+    }
+}
+
+int /*long*/ getAddress () {
+    return helperAppLauncherDialog.getAddress ();
+}
+
+int QueryInterface (int /*long*/ riid, int /*long*/ ppvObject) {
+    if (riid is 0 || ppvObject is 0) return XPCOM.NS_ERROR_NO_INTERFACE;
+    nsID guid = new nsID ();
+    XPCOM.memmove (guid, riid, nsID.sizeof);
+    
+    if (guid.Equals (nsISupports.NS_ISUPPORTS_IID)) {
+        XPCOM.memmove (ppvObject, new int /*long*/[] {supports.getAddress ()}, C.PTR_SIZEOF);
+        AddRef ();
+        return XPCOM.NS_OK;
+    }
+    if (guid.Equals (nsIHelperAppLauncherDialog.NS_IHELPERAPPLAUNCHERDIALOG_IID)) {
+        XPCOM.memmove (ppvObject, new int /*long*/[] {helperAppLauncherDialog.getAddress ()}, C.PTR_SIZEOF);
+        AddRef ();
+        return XPCOM.NS_OK;
+    }
+    
+    XPCOM.memmove (ppvObject, new int /*long*/[] {0}, C.PTR_SIZEOF);
+    return XPCOM.NS_ERROR_NO_INTERFACE;
+}
+            
+int Release () {
+    refCount--;
+    /*
+    * Note.  This instance lives as long as the download it is binded to.
+    * Its reference count is expected to go down to 0 when the download
+    * has completed or when it has been cancelled. E.g. when the user
+    * cancels the File Dialog, cancels or closes the Download Dialog
+    * and when the Download Dialog goes away after the download is completed.
+    */
+    if (refCount is 0) disposeCOMInterfaces ();
+    return refCount;
+}
+
+/* nsIHelperAppLauncherDialog */
+
+int Show (int /*long*/ aLauncher, int /*long*/ aContext, int aReason) {
+    /*
+    * The interface for nsIHelperAppLauncher changed in GRE versions 1.8 and 1.9.  Query for
+    * each of these interfaces in turn until one is found.
+    */
+    nsISupports supports = new nsISupports (aLauncher);
+    int /*long*/[] result = new int /*long*/[1];
+    int rc = supports.QueryInterface (nsIHelperAppLauncher_1_9.NS_IHELPERAPPLAUNCHER_IID, result);
+    if (rc is 0) {
+        nsIHelperAppLauncher_1_9 helperAppLauncher = new nsIHelperAppLauncher_1_9 (aLauncher);
+        rc = helperAppLauncher.SaveToDisk (0, 0);
+        helperAppLauncher.Release ();
+        return rc;
+    }
+
+    result[0] = 0;
+    rc = supports.QueryInterface (nsIHelperAppLauncher_1_8.NS_IHELPERAPPLAUNCHER_IID, result);
+    if (rc is 0) {
+        nsIHelperAppLauncher_1_8 helperAppLauncher = new nsIHelperAppLauncher_1_8 (aLauncher);
+        rc = helperAppLauncher.SaveToDisk (0, 0);
+        helperAppLauncher.Release ();
+        return rc;
+    }
+
+    nsIHelperAppLauncher helperAppLauncher = new nsIHelperAppLauncher (aLauncher);  /* < 1.8 */
+    return helperAppLauncher.SaveToDisk (0, 0);
+}
+
+int PromptForSaveToFile (int /*long*/ arg0, int /*long*/ arg1, int /*long*/ arg2, int /*long*/ arg3, int /*long*/ arg4) {
+    int /*long*/ aDefaultFile, aSuggestedFileExtension, _retval;
+    bool hasLauncher = false;
+
+    /*
+    * The interface for nsIHelperAppLauncherDialog changed as of mozilla 1.5 when an
+    * extra argument was added to the PromptForSaveToFile method (this resulted in all
+    * subsequent arguments shifting right).  The workaround is to provide an XPCOMObject 
+    * that fits the newer API, and to use the first argument's type to infer whether
+    * the old or new nsIHelperAppLauncherDialog interface is being used (and by extension
+    * the ordering of the arguments).  In mozilla >= 1.5 the first argument is an
+    * nsIHelperAppLauncher. 
+    */
+    /*
+     * The interface for nsIHelperAppLauncher changed as of mozilla 1.8, so the first
+     * argument must be queried for both the old and new nsIHelperAppLauncher interfaces. 
+     */
+    bool using_1_8 = false, using_1_9 = false;
+    nsISupports support = new nsISupports (arg0);
+    int /*long*/[] result = new int /*long*/[1];
+    int rc = support.QueryInterface (nsIHelperAppLauncher_1_8.NS_IHELPERAPPLAUNCHER_IID, result);
+    if (rc is 0) {
+        using_1_8 = true;
+        hasLauncher = true;
+        new nsISupports (result[0]).Release ();
+    } else {
+        result[0] = 0;
+        rc = support.QueryInterface (nsIHelperAppLauncher_1_9.NS_IHELPERAPPLAUNCHER_IID, result);
+        if (rc is 0) {
+            using_1_9 = true;
+            hasLauncher = true;
+            new nsISupports (result[0]).Release ();
+        } else {
+            result[0] = 0;
+            rc = support.QueryInterface (nsIHelperAppLauncher.NS_IHELPERAPPLAUNCHER_IID, result);
+            if (rc is 0) {
+                hasLauncher = true;
+                new nsISupports (result[0]).Release ();
+            }
+        }
+    }
+    result[0] = 0;
+
+    if (hasLauncher) {  /* >= 1.5 */
+        aDefaultFile = arg2;
+        aSuggestedFileExtension = arg3;
+        _retval = arg4;
+    } else {            /* 1.4 */
+        aDefaultFile = arg1;
+        aSuggestedFileExtension = arg2;
+        _retval = arg3;
+    }
+
+    int length = XPCOM.strlen_PRUnichar (aDefaultFile);
+    char[] dest = new char[length];
+    XPCOM.memmove (dest, aDefaultFile, length * 2);
+    String defaultFile = new String (dest);
+
+    length = XPCOM.strlen_PRUnichar (aSuggestedFileExtension);
+    dest = new char[length];
+    XPCOM.memmove (dest, aSuggestedFileExtension, length * 2);
+    String suggestedFileExtension = new String (dest);
+
+    Shell shell = new Shell ();
+    FileDialog fileDialog = new FileDialog (shell, DWT.SAVE);
+    fileDialog.setFileName (defaultFile);
+    fileDialog.setFilterExtensions (new String[] {suggestedFileExtension});
+    String name = fileDialog.open ();
+    shell.close ();
+    if (name is null) {
+        if (hasLauncher) {
+            if (using_1_8) {
+                nsIHelperAppLauncher_1_8 launcher = new nsIHelperAppLauncher_1_8 (arg0);
+                rc = launcher.Cancel (XPCOM.NS_BINDING_ABORTED);
+            } else if (using_1_9) {
+                nsIHelperAppLauncher_1_9 launcher = new nsIHelperAppLauncher_1_9 (arg0);
+                rc = launcher.Cancel (XPCOM.NS_BINDING_ABORTED);
+            } else {
+                nsIHelperAppLauncher launcher = new nsIHelperAppLauncher (arg0);
+                rc = launcher.Cancel ();
+            }
+            if (rc !is XPCOM.NS_OK) Mozilla.error (rc);
+            return XPCOM.NS_OK;
+        }
+        return XPCOM.NS_ERROR_FAILURE;
+    }
+    nsEmbedString path = new nsEmbedString (name);
+    rc = XPCOM.NS_NewLocalFile (path.getAddress (), 1, result);
+    path.dispose ();
+    if (rc !is XPCOM.NS_OK) Mozilla.error (rc);
+    if (result[0] is 0) Mozilla.error (XPCOM.NS_ERROR_NULL_POINTER);
+    /* Our own nsIDownload has been registered during the Browser initialization. It will be invoked by Mozilla. */
+    XPCOM.memmove (_retval, result, C.PTR_SIZEOF);  
+    return XPCOM.NS_OK;
+}
+}