/*******************************************************************************
 * 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
 * Port to the D programming language:
 *      John Reimer <terminal.node@gmail.com>
 *******************************************************************************/
module dwt.browser.Download_1_8;

import dwt.dwthelper.utils;

import dwt.DWT;

import dwt.internal.Compatibility;
import dwt.internal.mozilla.XPCOM;
import dwt.internal.mozilla.nsICancelable;
import dwt.internal.mozilla.nsID;
import dwt.internal.mozilla.nsIDownload_1_8;
import dwt.internal.mozilla.nsIProgressDialog_1_8;
import dwt.internal.mozilla.nsISupports;
import dwt.internal.mozilla.nsIURI;
import dwt.internal.mozilla.nsIWebProgressListener;
import dwt.layout.GridData;
import dwt.layout.GridLayout;
import dwt.widgets.Button;
import dwt.widgets.Event;
import dwt.widgets.Label;
import dwt.widgets.Listener;
import dwt.widgets.Shell;

class Download_1_8 : nsIProgressDialog_1_8 {
    nsICancelable cancelable;
    int refCount = 0;

    Shell shell;
    Label status;
    Button cancel;

    //static final bool is32 = C.PTR_SIZEOF is 4; //determine if 32 or 64 bit platform?

this () {
}

int AddRef () {
    refCount++;
    return refCount;
}

int QueryInterface ( nsID* riid, void** ppvObject) {
    if (riid is null || ppvObject is null) return XPCOM.NS_ERROR_NO_INTERFACE;
   
    if (*riid == nsISupports.IID)) {
        *ppvObject = cast(void*)cast(nsISupports)this;
        AddRef();
        return XPCOM.NS_OK;
    }
    if (*riid == nsIDownload_1_8.IID)) {
        *ppvObject = cast(void*)cast(nsIDownload_1_8)this;
        AddRef();
        return XPCOM.NS_OK;
    }
    if (*riid == nsIProgressDialog_1_8.IID) {
        *ppvObject = cast(void*)cast(nsIProgressDialog_1_8)this;
        AddRef();
        return XPCOM.NS_OK;
    }
    if (*riid == nsIWebProgressListener.IID) {
        *ppvObject = cast(void*)cast(nsIWebProgressListener)this;
        AddRef();
        return XPCOM.NS_OK;
    }
    *ppvObject = null;
    return XPCOM.NS_ERROR_NO_INTERFACE;
}

int Release () {
    refCount--;
    if (refCount is 0) return 0;
    return refCount;
}

/* nsIDownload */

/* Note. The argument startTime is defined as a PRInt64. This translates into two java ints. */
int Init_32 (int /*long*/ aSource, int /*long*/ aTarget, int /*long*/ aDisplayName, int /*long*/ aMIMEInfo, int /*long*/ startTime1, int /*long*/ startTime2, int /*long*/ aTempFile, int /*long*/ aCancelable) {
    long startTime = (startTime2 << 32) + startTime1;
    return Init (aSource, aTarget, aDisplayName, aMIMEInfo, startTime, aTempFile, aCancelable);
}

int Init (int /*long*/ aSource, int /*long*/ aTarget, int /*long*/ aDisplayName, int /*long*/ aMIMEInfo, long startTime, int /*long*/ aTempFile, int /*long*/ aCancelable) {
    cancelable = new nsICancelable (aCancelable);
    nsIURI source = new nsIURI (aSource);
    int /*long*/ aSpec = XPCOM.nsEmbedCString_new ();
    int rc = source.GetHost (aSpec);
    if (rc !is XPCOM.NS_OK) Mozilla.error(rc);
    int length = XPCOM.nsEmbedCString_Length (aSpec);
    int /*long*/ buffer = XPCOM.nsEmbedCString_get (aSpec);
    byte[] dest = new byte[length];
    XPCOM.memmove (dest, buffer, length);
    XPCOM.nsEmbedCString_delete (aSpec);
    String url = new String (dest);

    nsIURI target = new nsIURI (aTarget);
    int /*long*/ aPath = XPCOM.nsEmbedCString_new ();
    rc = target.GetPath (aPath);
    if (rc !is XPCOM.NS_OK) Mozilla.error (rc);
    length = XPCOM.nsEmbedCString_Length (aPath);
    buffer = XPCOM.nsEmbedCString_get (aPath);
    dest = new byte[length];
    XPCOM.memmove (dest, buffer, length);
    XPCOM.nsEmbedCString_delete (aPath);
    String filename = new String (dest);
    int separator = filename.lastIndexOf (System.getProperty ("file.separator"));   //$NON-NLS-1$
    filename = filename.substring (separator + 1);

    Listener listener = new Listener() {
        public void handleEvent (Event event) {
            if (event.widget is cancel) {
                shell.close ();
            }
            if (cancelable !is null) {
                int rc = cancelable.Cancel (XPCOM.NS_BINDING_ABORTED);
                if (rc !is XPCOM.NS_OK) Mozilla.error (rc);
            }
            shell = null;
            cancelable = null;
        }
    };
    shell = new Shell (DWT.DIALOG_TRIM);
    String msg = Compatibility.getMessage ("SWT_Download_File", new Object[] {filename}); //$NON-NLS-1$
    shell.setText (msg);
    GridLayout gridLayout = new GridLayout ();
    gridLayout.marginHeight = 15;
    gridLayout.marginWidth = 15;
    gridLayout.verticalSpacing = 20;
    shell.setLayout (gridLayout);
    msg = Compatibility.getMessage ("SWT_Download_Location", new Object[] {filename, url}); //$NON-NLS-1$
    new Label (shell, DWT.SIMPLE).setText (msg);
    status = new Label (shell, DWT.SIMPLE);
    msg = Compatibility.getMessage ("SWT_Download_Started"); //$NON-NLS-1$
    status.setText (msg);
    GridData data = new GridData ();
    data.grabExcessHorizontalSpace = true;
    data.grabExcessVerticalSpace = true;
    status.setLayoutData (data);
    
    cancel = new Button (shell, DWT.PUSH);
    cancel.setText (DWT.getMessage ("SWT_Cancel")); //$NON-NLS-1$
    data = new GridData ();
    data.horizontalAlignment = GridData.CENTER;
    cancel.setLayoutData (data);
    cancel.addListener (DWT.Selection, listener);
    shell.addListener (DWT.Close, listener);
    shell.pack ();
    shell.open ();
    return XPCOM.NS_OK;
}

int GetAmountTransferred (int /*long*/ arg0) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetCancelable (int /*long*/ arg0) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetDisplayName (int /*long*/ aDisplayName) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetMIMEInfo (int /*long*/ aMIMEInfo) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetPercentComplete (int /*long*/ aPercentComplete) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetSize (int /*long*/ arg0) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetSource (int /*long*/ aSource) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetStartTime (int /*long*/ aStartTime) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetTarget (int /*long*/ aTarget) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetTargetFile (int /*long*/ arg0) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

/* nsIProgressDialog */
int GetCancelDownloadOnClose (int /*long*/ aCancelDownloadOnClose) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetDialog (int /*long*/ aDialog) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int GetObserver (int /*long*/ aObserver) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int Open (int /*long*/ aParent) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int SetCancelDownloadOnClose (int aCancelDownloadOnClose) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int SetDialog (int /*long*/ aDialog) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

int SetObserver (int /*long*/ aObserver) {
    return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}

/* nsIWebProgressListener */

int OnLocationChange (int /*long*/ aWebProgress, int /*long*/ aRequest, int /*long*/ aLocation) {
    return XPCOM.NS_OK;
}

int OnProgressChange (int /*long*/ aWebProgress, int /*long*/ aRequest, int aCurSelfProgress, int aMaxSelfProgress, int aCurTotalProgress, int aMaxTotalProgress) {
    return OnProgressChange64 (aWebProgress, aRequest, aCurSelfProgress, aMaxSelfProgress, aCurTotalProgress, aMaxTotalProgress);
}

/* Note. The last 4 args in the original interface are defined as PRInt64. These each translate into two java ints. */
int OnProgressChange64_32 (int /*long*/ aWebProgress, int /*long*/ aRequest, int /*long*/ aCurSelfProgress1, int /*long*/ aCurSelfProgress2, int /*long*/ aMaxSelfProgress1, int /*long*/ aMaxSelfProgress2, int /*long*/ aCurTotalProgress1, int /*long*/ aCurTotalProgress2, int /*long*/ aMaxTotalProgress1, int /*long*/ aMaxTotalProgress2) {
    long aCurSelfProgress = (aCurSelfProgress2 << 32) + aCurSelfProgress1;
    long aMaxSelfProgress = (aMaxSelfProgress2 << 32) + aMaxSelfProgress1;
    long aCurTotalProgress = (aCurTotalProgress2 << 32) + aCurTotalProgress1;
    long aMaxTotalProgress = (aMaxTotalProgress2 << 32) + aMaxTotalProgress1;
    return OnProgressChange64 (aWebProgress, aRequest, aCurSelfProgress, aMaxSelfProgress, aCurTotalProgress, aMaxTotalProgress);
}

int OnProgressChange64 (int /*long*/ aWebProgress, int /*long*/ aRequest, long aCurSelfProgress, long aMaxSelfProgress, long aCurTotalProgress, long aMaxTotalProgress) {
    long currentKBytes = aCurTotalProgress / 1024;
    long totalKBytes = aMaxTotalProgress / 1024;
    if (shell !is null && !shell.isDisposed ()) {
        Object[] arguments = {new Long (currentKBytes), new Long (totalKBytes)};
        String statusMsg = Compatibility.getMessage ("SWT_Download_Status", arguments); //$NON-NLS-1$
        status.setText (statusMsg);
        shell.layout (true);
        shell.getDisplay ().update ();
    }
    return XPCOM.NS_OK;
}

int OnSecurityChange (int /*long*/ aWebProgress, int /*long*/ aRequest, int state) {
    return XPCOM.NS_OK;
}

int OnStateChange (int /*long*/ aWebProgress, int /*long*/ aRequest, int aStateFlags, int aStatus) {
    if ((aStateFlags & nsIWebProgressListener.STATE_STOP) !is 0) {
        cancelable = null;
        if (shell !is null && !shell.isDisposed ()) shell.dispose ();
        shell = null;
    }
    return XPCOM.NS_OK;
}   

int OnStatusChange (int /*long*/ aWebProgress, int /*long*/ aRequest, int aStatus, int /*long*/ aMessage) {
    return XPCOM.NS_OK;
}       
}