/*******************************************************************************
 * Copyright (c) 2003, 2008 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_1_9;

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.nsIHelperAppLauncherDialog_1_9;
import dwt.internal.mozilla.nsIHelperAppLauncher_1_9;
import dwt.internal.mozilla.nsISupports;
import dwt.widgets.FileDialog;
import dwt.widgets.Shell;

/**
 * This class implements the nsIHelperAppLauncherDialog interface for mozilla
 * versions >= 1.9.  For mozilla versions 1.4 - 1.8.x this interface is
 * implemented by class HelperAppLauncherDialog.  HelperAppLauncherDialogFactory
 * determines at runtime which of these classes to instantiate. 
 */
class HelperAppLauncherDialog_1_9 {
    XPCOMObject supports;
    XPCOMObject helperAppLauncherDialog;
    int refCount = 0;

HelperAppLauncherDialog_1_9 () {
    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, 6}) {
        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], (int)/*64*/args[4], args[5]);}
    };      
}

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_1_9.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 bound 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) {
    nsIHelperAppLauncher_1_9 helperAppLauncher = new nsIHelperAppLauncher_1_9 (aLauncher);
    return helperAppLauncher.SaveToDisk (0, 0);
}

int PromptForSaveToFile (int /*long*/ aLauncher, int /*long*/ aWindowContext, int /*long*/ aDefaultFileName, int /*long*/ aSuggestedFileExtension, int aForcePrompt, int /*long*/ _retval) {
    int length = XPCOM.strlen_PRUnichar (aDefaultFileName);
    char[] dest = new char[length];
    XPCOM.memmove (dest, aDefaultFileName, 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) {
        nsIHelperAppLauncher_1_9 launcher = new nsIHelperAppLauncher_1_9 (aLauncher);
        int rc = launcher.Cancel (XPCOM.NS_BINDING_ABORTED);
        if (rc !is XPCOM.NS_OK) Mozilla.error (rc);
        return XPCOM.NS_ERROR_FAILURE;
    }
    nsEmbedString path = new nsEmbedString (name);
    int /*long*/[] result = new int /*long*/[1];
    int 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;
}
}