/*******************************************************************************
 * 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.FilePicker;

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.nsIDOMWindow;
import dwt.internal.mozilla.nsIFilePicker;
import dwt.internal.mozilla.nsIFilePicker_1_8;
import dwt.internal.mozilla.nsILocalFile;
import dwt.internal.mozilla.nsISupports;
import dwt.widgets.DirectoryDialog;
import dwt.widgets.FileDialog;
import dwt.widgets.Shell;

class FilePicker {
    XPCOMObject supports;
    XPCOMObject filePicker;

    int refCount = 0;
    short mode;
    int /*long*/ parentHandle;
    String[] files, masks;
    String defaultFilename, directory, title;

    static final String SEPARATOR = System.getProperty ("file.separator"); //$NON-NLS-1$

this () {
    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 ();}
    };

    filePicker = new XPCOMObject (new int[] {2, 0, 0, 3, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}) {
        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 Init (args[0], args[1], cast(short)args[2]);}
        public int /*long*/ method4 (int /*long*/[] args) {return AppendFilters (cast(int)/*64*/args[0]);}
        public int /*long*/ method5 (int /*long*/[] args) {return AppendFilter (args[0], args[1]);}
        public int /*long*/ method6 (int /*long*/[] args) {return GetDefaultString (args[0]);}
        public int /*long*/ method7 (int /*long*/[] args) {return SetDefaultString (args[0]);}
        public int /*long*/ method8 (int /*long*/[] args) {return GetDefaultExtension (args[0]);}
        public int /*long*/ method9 (int /*long*/[] args) {return SetDefaultExtension (args[0]);}
        public int /*long*/ method10 (int /*long*/[] args) {return GetFilterIndex (args[0]);}
        public int /*long*/ method11 (int /*long*/[] args) {return SetFilterIndex (cast(int)/*64*/args[0]);}
        public int /*long*/ method12 (int /*long*/[] args) {return GetDisplayDirectory (args[0]);}
        public int /*long*/ method13 (int /*long*/[] args) {return SetDisplayDirectory (args[0]);}
        public int /*long*/ method14 (int /*long*/[] args) {return GetFile (args[0]);}
        public int /*long*/ method15 (int /*long*/[] args) {return GetFileURL (args[0]);}
        public int /*long*/ method16 (int /*long*/[] args) {return GetFiles (args[0]);}
        public int /*long*/ method17 (int /*long*/[] args) {return Show (args[0]);}
    };
}

void disposeCOMInterfaces () {
    if (supports !is null) {
        supports.dispose ();
        supports = null;
    }   
    if (filePicker !is null) {
        filePicker.dispose ();
        filePicker = null;  
    }
}

int /*long*/ getAddress () {
    return filePicker.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 (nsIFilePicker.NS_IFILEPICKER_IID)) {
        XPCOM.memmove(ppvObject, new int /*long*/[] {filePicker.getAddress ()}, C.PTR_SIZEOF);
        AddRef ();
        return XPCOM.NS_OK;
    }
    if (guid.Equals (nsIFilePicker_1_8.NS_IFILEPICKER_IID)) {
        XPCOM.memmove(ppvObject, new int /*long*/[] {filePicker.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--;
    if (refCount is 0) disposeCOMInterfaces ();
    return refCount;
}

Browser getBrowser (int /*long*/ aDOMWindow) {
    if (aDOMWindow is 0) return null;
    nsIDOMWindow window = new nsIDOMWindow (aDOMWindow);
    return Mozilla.findBrowser (window);
}

/*
 * As of Mozilla 1.8 some of nsIFilePicker's string arguments changed type.  This method
 * answers a java string based on the type of string that is appropriate for the Mozilla
 * version being used.
 */
String parseAString (int /*long*/ string) {
    return null;
}

/* nsIFilePicker */

int Init (int /*long*/ parent, int /*long*/ title, short mode) {
    parentHandle = parent;
    this.mode = mode;
    this.title = parseAString (title);
    return XPCOM.NS_OK;
}

int Show (int /*long*/ _retval) {
    if (mode is nsIFilePicker.modeGetFolder) {
        /* picking a directory */
        int result = showDirectoryPicker ();
        XPCOM.memmove (_retval, new short[] {cast(short)result}, 2); /* PRInt16 */
        return XPCOM.NS_OK;
    }

    /* picking a file */
    int style = mode is nsIFilePicker.modeSave ? DWT.SAVE : DWT.OPEN;
    if (mode is nsIFilePicker.modeOpenMultiple) style |= DWT.MULTI;
    Browser browser = getBrowser (parentHandle);
    Shell parent = null;
    if (browser !is null) {
        parent = browser.getShell ();
    } else {
        parent = new Shell ();
    }
    FileDialog dialog = new FileDialog (parent, style);
    if (title !is null) dialog.setText (title);
    if (directory !is null) dialog.setFilterPath (directory);
    if (masks !is null) dialog.setFilterExtensions (masks);
    if (defaultFilename !is null) dialog.setFileName (defaultFilename);
    String filename = dialog.open ();
    files = dialog.getFileNames ();
    directory = dialog.getFilterPath ();
    title = defaultFilename = null;
    masks = null;
    int result = filename is null ? nsIFilePicker.returnCancel : nsIFilePicker.returnOK; 
    XPCOM.memmove (_retval, new short[] {cast(short)result}, 2); /* PRInt16 */
    return XPCOM.NS_OK;
}

int showDirectoryPicker () {
    Browser browser = getBrowser (parentHandle);
    Shell parent = null;
    if (browser !is null) {
        parent = browser.getShell ();
    } else {
        parent = new Shell ();
    }
    DirectoryDialog dialog = new DirectoryDialog (parent, DWT.NONE);
    if (title !is null) dialog.setText (title);
    if (directory !is null) dialog.setFilterPath (directory);
    directory = dialog.open ();
    title = defaultFilename = null;
    files = masks = null;
    return directory is null ? nsIFilePicker.returnCancel : nsIFilePicker.returnOK;
}

int GetFiles (int /*long*/ aFiles) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetFileURL (int /*long*/ aFileURL) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetFile (int /*long*/ aFile) {
    String filename = "";   //$NON-NLS-1$
    if (directory !is null) filename += directory + SEPARATOR;
    if (files !is null && files.length > 0) filename += files[0];
    nsEmbedString path = new nsEmbedString (filename);
    int /*long*/[] file = new int /*long*/[1];
    int rc = XPCOM.NS_NewLocalFile (path.getAddress (), 1, file);
    path.dispose ();
    if (rc !is XPCOM.NS_OK) Mozilla.error (rc);
    if (file[0] is 0) Mozilla.error (XPCOM.NS_ERROR_NULL_POINTER);
    XPCOM.memmove (aFile, file, C.PTR_SIZEOF);
    return XPCOM.NS_OK;
}

int SetDisplayDirectory (int /*long*/ aDisplayDirectory) {
    if (aDisplayDirectory is 0) return XPCOM.NS_OK;
    nsILocalFile file = new nsILocalFile (aDisplayDirectory);
    int /*long*/ pathname = XPCOM.nsEmbedCString_new ();
    file.GetNativePath (pathname);
    int length = XPCOM.nsEmbedCString_Length (pathname);
    int /*long*/ buffer = XPCOM.nsEmbedCString_get (pathname);
    byte[] bytes = new byte[length];
    XPCOM.memmove (bytes, buffer, length);
    XPCOM.nsEmbedCString_delete (pathname);
    char[] chars = MozillaDelegate.mbcsToWcs (null, bytes);
    directory = new String (chars);
    return XPCOM.NS_OK;
}

int GetDisplayDirectory (int /*long*/ aDisplayDirectory) {
    String directoryName = directory !is null ? directory : ""; //$NON-NLS-1$
    nsEmbedString path = new nsEmbedString (directoryName);
    int /*long*/[] file = new int /*long*/[1];
    int rc = XPCOM.NS_NewLocalFile (path.getAddress (), 1, file);
    path.dispose ();
    if (rc !is XPCOM.NS_OK) Mozilla.error (rc);
    if (file[0] is 0) Mozilla.error (XPCOM.NS_ERROR_NULL_POINTER);
    XPCOM.memmove (aDisplayDirectory, file, C.PTR_SIZEOF);
    return XPCOM.NS_OK;
}

int SetFilterIndex (int aFilterIndex) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetFilterIndex (int /*long*/ aFilterIndex) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int SetDefaultExtension (int /*long*/ aDefaultExtension) {
    /* note that the type of argument 1 changed as of Mozilla 1.8 */
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetDefaultExtension (int /*long*/ aDefaultExtension) {
    /* note that the type of argument 1 changed as of Mozilla 1.8 */
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int SetDefaultString (int /*long*/ aDefaultString) {
    defaultFilename = parseAString (aDefaultString);
    return XPCOM.NS_OK;
}

int GetDefaultString (int /*long*/ aDefaultString) {
    /* note that the type of argument 1 changed as of Mozilla 1.8 */
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int AppendFilter (int /*long*/ title, int /*long*/ filter) {
    /* note that the type of arguments 1 and 2 changed as of Mozilla 1.8 */
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int AppendFilters (int filterMask) {
    String[] addFilters = null;
    switch (filterMask) {
        case nsIFilePicker.filterAll:
        case nsIFilePicker.filterApps:
            masks = null;           /* this is equivalent to no filter */
            break;
        case nsIFilePicker.filterHTML:
            addFilters = new String[] {"*.htm;*.html"}; //$NON-NLS-1$
            break;
        case nsIFilePicker.filterImages:
            addFilters = new String[] {"*.gif;*.jpeg;*.jpg;*.png"}; //$NON-NLS-1$
            break;
        case nsIFilePicker.filterText:
            addFilters = new String[] {"*.txt"};    //$NON-NLS-1$
            break;
        case nsIFilePicker.filterXML:
            addFilters = new String[] {"*.xml"};    //$NON-NLS-1$
            break;
        case nsIFilePicker.filterXUL:
            addFilters = new String[] {"*.xul"};    //$NON-NLS-1$
            break;
    }
    if (masks is null) {
        masks = addFilters;
    } else {
        if (addFilters !is null) {
            String[] newFilters = new String[masks.length + addFilters.length];
            System.arraycopy (masks, 0, newFilters, 0, masks.length);
            System.arraycopy (addFilters, 0, newFilters, masks.length, addFilters.length);
            masks = newFilters;
        }
    }
    return XPCOM.NS_OK;
}
}