path: root/embed/mozilla/MozDownload.cpp

/* -*- 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) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Conrad Carlen <ccarlen@netscape.com>
 * 
 * Adapted for epiphany by Marco Pesenti Gritti <marco@gnome.org>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 *****
 *
 * $Id$
 */

#include "MozDownload.h"
#include "mozilla-download.h"
#include "eel-gconf-extensions.h"
#include "ephy-prefs.h"
#include <libgnomevfs/gnome-vfs-utils.h>

#include "nsIExternalHelperAppService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsDirectoryServiceUtils.h"
#include "nsIRequest.h"
#include "netCore.h"

const char* const persistContractID = "@mozilla.org/embedding/browser/nsWebBrowserPersist;1";

MozDownload::MozDownload() :
    mGotFirstStateChange(false), mIsNetworkTransfer(false),
    mStatus(NS_OK),
    mEmbedPersist(nsnull),
    mDownloadState(EPHY_DOWNLOAD_DOWNLOADING)
{
}

MozDownload::~MozDownload()
{
}

NS_IMPL_ISUPPORTS2(MozDownload, nsIDownload, nsIWebProgressListener)

NS_IMETHODIMP
MozDownload::InitForEmbed (nsIURI *aSource, nsILocalFile *aTarget, const PRUnichar *aDisplayName,
                   nsIMIMEInfo *aMIMEInfo, PRInt64 startTime, nsIWebBrowserPersist *aPersist,
                   MozillaEmbedPersist *aEmbedPersist)
{
    mEmbedPersist = aEmbedPersist;
    return Init (aSource, aTarget, aDisplayName, aMIMEInfo, startTime, aPersist);
}

/* void init (in nsIURI aSource, in nsILocalFile aTarget, in wstring aDisplayName, in nsIMIMEInfo aMIMEInfo, in long long startTime, in nsIWebBrowserPersist aPersist); */
NS_IMETHODIMP
MozDownload::Init(nsIURI *aSource, nsILocalFile *aTarget, const PRUnichar *aDisplayName,
           nsIMIMEInfo *aMIMEInfo, PRInt64 startTime, nsIWebBrowserPersist *aPersist)
{
    PRBool addToView = PR_TRUE;

    if (mEmbedPersist)
    {
        EmbedPersistFlags flags;

        flags = ephy_embed_persist_get_flags (EPHY_EMBED_PERSIST (mEmbedPersist));

        addToView = !(flags & EMBED_PERSIST_NO_VIEW);
    }

    mSource = aSource;
    mDestination = aTarget;
    mStartTime = startTime;
    mTotalProgress = 0;
    mCurrentProgress = 0;
    mPercentComplete = 0;
    mInterval = 4000; /* in ms */
    mLastUpdate = mStartTime;

    if (aPersist)
    {
        mWebPersist = aPersist;
        aPersist->SetProgressListener(this);
        }

    if (addToView)
    { 
        DownloaderView *dview;
        dview = EPHY_DOWNLOADER_VIEW
            (ephy_embed_shell_get_downloader_view (embed_shell));
        mEphyDownload = mozilla_download_new ();
        MOZILLA_DOWNLOAD (mEphyDownload)->moz_download = this;
        downloader_view_add_download (dview, mEphyDownload);
    }
    else
    {
        mEphyDownload = nsnull;
    }

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetSource(nsIURI **aSource)
{
    NS_ENSURE_ARG_POINTER(aSource);
    NS_IF_ADDREF(*aSource = mSource);

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetTarget(nsILocalFile **aTarget)
{
    NS_ENSURE_ARG_POINTER(aTarget);
    NS_IF_ADDREF(*aTarget = mDestination);

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetPersist(nsIWebBrowserPersist **aPersist)
{
    NS_ENSURE_ARG_POINTER(aPersist);
    NS_IF_ADDREF(*aPersist = mWebPersist);

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetPercentComplete(PRInt32 *aPercentComplete)
{
    NS_ENSURE_ARG_POINTER(aPercentComplete);
    *aPercentComplete = mPercentComplete;

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetTotalProgress(PRInt32 *aTotalProgress)
{
    NS_ENSURE_ARG_POINTER(aTotalProgress);
    *aTotalProgress = mTotalProgress;

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetCurrentProgress(PRInt32 *aCurrentProgress)
{
    NS_ENSURE_ARG_POINTER(aCurrentProgress);
    *aCurrentProgress = mCurrentProgress;

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetState(EphyDownloadState *aDownloadState)
{
    NS_ENSURE_ARG_POINTER(aDownloadState);
    *aDownloadState = mDownloadState;

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetDisplayName(PRUnichar * *aDisplayName)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
MozDownload::SetDisplayName(const PRUnichar * aDisplayName)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
MozDownload::GetStartTime(PRInt64 *aStartTime)
{
    NS_ENSURE_ARG_POINTER(aStartTime);
    *aStartTime = mStartTime;

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetElapsedTime(PRInt64 *aElapsedTime)
{
    NS_ENSURE_ARG_POINTER(aElapsedTime);
    *aElapsedTime = PR_Now() - mStartTime;

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::GetMIMEInfo(nsIMIMEInfo **aMIMEInfo)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
MozDownload::GetListener(nsIWebProgressListener **aListener)
{
    NS_ENSURE_ARG_POINTER(aListener);
    NS_IF_ADDREF(*aListener = (nsIWebProgressListener *)this);

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::SetListener(nsIWebProgressListener *aListener)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
MozDownload::GetObserver(nsIObserver **aObserver)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
MozDownload::SetObserver(nsIObserver *aObserver)
{
    mObserver = aObserver;

    return NS_OK;
}

NS_IMETHODIMP 
MozDownload::OnStateChange (nsIWebProgress *aWebProgress, nsIRequest *aRequest,
                PRUint32 aStateFlags, nsresult aStatus)
{
    /* For a file download via the external helper app service, we will never get a start
           notification. The helper app service has gotten that notification before it created us. */
    if (!mGotFirstStateChange)
    {
            mIsNetworkTransfer = ((aStateFlags & STATE_IS_NETWORK) != 0);
            mGotFirstStateChange = PR_TRUE;
    }

    if (NS_FAILED(aStatus) && NS_SUCCEEDED(mStatus))
            mStatus = aStatus;
  
    /* We will get this even in the event of a cancel */
    if ((aStateFlags & STATE_STOP) && (!mIsNetworkTransfer || (aStateFlags & STATE_IS_NETWORK)))
    {
        /* Keep us alive */
        nsCOMPtr<nsIDownload> kungFuDeathGrip(this);

        mDownloadState = NS_SUCCEEDED (aStatus) ? EPHY_DOWNLOAD_COMPLETED : EPHY_DOWNLOAD_FAILED;
        if (mEphyDownload)
        {
            g_signal_emit_by_name (mEphyDownload, "changed");
        }

            if (mWebPersist)
        {
                mWebPersist->SetProgressListener(nsnull);
                mWebPersist = nsnull;
            }

        if (mEmbedPersist)
        {
            if (NS_SUCCEEDED (aStatus))
            {
                mozilla_embed_persist_completed (mEmbedPersist);
            }
            else
            {
                mozilla_embed_persist_cancelled (mEmbedPersist);
            }
        }
    }
        
    return NS_OK; 
}

NS_IMETHODIMP 
MozDownload::OnProgressChange(nsIWebProgress *aWebProgress, nsIRequest *aRequest,
                  PRInt32 aCurSelfProgress, PRInt32 aMaxSelfProgress,
                  PRInt32 aCurTotalProgress, PRInt32 aMaxTotalProgress)
{
    if (!mRequest)
        mRequest = aRequest;

    PRInt64 now = PR_Now ();

    if ((now - mLastUpdate < mInterval) &&
        (aMaxTotalProgress != -1) &&
        (aCurTotalProgress < aMaxTotalProgress))
        return NS_OK;

    mLastUpdate = now;

    if (aMaxTotalProgress == -1)
    {
            mPercentComplete = -1;
    }
    else
    {
            mPercentComplete = (PRInt32)(((float)aCurTotalProgress / (float)aMaxTotalProgress) * 100.0 + 0.5);
    }

    mTotalProgress = aMaxTotalProgress;
    mCurrentProgress = aCurTotalProgress;

    if (mEphyDownload)
    {
        g_signal_emit_by_name (mEphyDownload, "changed");
    }

    return NS_OK;
}

NS_IMETHODIMP
MozDownload::OnLocationChange (nsIWebProgress *aWebProgress, nsIRequest *aRequest, nsIURI *location)
{
    return NS_OK;
}

NS_IMETHODIMP 
MozDownload::OnStatusChange (nsIWebProgress *aWebProgress, nsIRequest *aRequest,
                 nsresult aStatus, const PRUnichar *aMessage)
{
    return NS_OK;
}

NS_IMETHODIMP 
MozDownload::OnSecurityChange (nsIWebProgress *aWebProgress, nsIRequest *aRequest, PRUint32 state)
{
    return NS_OK;
}

void
MozDownload::Cancel()
{
    if (mWebPersist)
    {
        mWebPersist->CancelSave ();
    }

    if (mObserver)
    {
        mObserver->Observe (nsnull, "oncancel", nsnull);
    }   
}

void
MozDownload::Pause()
{
    if (mRequest)
    {
        mRequest->Suspend ();
        mDownloadState = EPHY_DOWNLOAD_PAUSED;
    }
}

void
MozDownload::Resume()
{
    if (mRequest)
    {
        mRequest->Resume ();
        mDownloadState = EPHY_DOWNLOAD_DOWNLOADING;
    }
}

nsresult InitiateMozillaDownload (nsIDOMDocument *domDocument, nsIURI *sourceURI,
                  nsILocalFile* inDestFile, const char *contentType,
                  nsIURI* inOriginalURI, MozillaEmbedPersist *embedPersist,
                  nsIInputStream *postData, nsISupports *aCacheKey)
{
    nsresult rv = NS_OK;

    EmbedPersistFlags ephy_flags;
    ephy_flags = ephy_embed_persist_get_flags (EPHY_EMBED_PERSIST (embedPersist));

    PRBool isHTML = (domDocument && contentType &&
            (strcmp (contentType, "text/html") == 0 ||
             strcmp (contentType, "text/xml") == 0 ||
             strcmp (contentType, "application/xhtml+xml") == 0));

    nsCOMPtr<nsIWebBrowserPersist> webPersist = do_CreateInstance(persistContractID, &rv);
    if (NS_FAILED(rv)) return rv;
  
    PRInt64 timeNow = PR_Now();
  
    nsAutoString fileDisplayName;
    inDestFile->GetLeafName(fileDisplayName);

    MozDownload *downloader = new MozDownload ();
    /* dlListener attaches to its progress dialog here, which gains ownership */
    rv = downloader->InitForEmbed (inOriginalURI, inDestFile, fileDisplayName.get(),
                       nsnull, timeNow, webPersist, embedPersist);
    if (NS_FAILED(rv)) return rv;

    PRInt32 flags = nsIWebBrowserPersist::PERSIST_FLAGS_REPLACE_EXISTING_FILES;
    if (ephy_flags & EMBED_PERSIST_COPY_PAGE)
    {
        flags |= nsIWebBrowserPersist::PERSIST_FLAGS_FROM_CACHE;
    }
    webPersist->SetPersistFlags(flags);

    if (!isHTML || ephy_flags & EMBED_PERSIST_COPY_PAGE)
    {
        rv = webPersist->SaveURI (sourceURI, aCacheKey, nsnull,
                      postData, nsnull, inDestFile);
    }
    else
    {
        if (!domDocument) return rv;  /* should never happen */
    
        PRInt32 encodingFlags = 0;
        nsCOMPtr<nsILocalFile> filesFolder;

            if (contentType && strcmp (contentType, "text/plain") == 0)
        {
            /* Create a local directory in the same dir as our file.  It
               will hold our associated files. */

            filesFolder = do_CreateInstance("@mozilla.org/file/local;1");
            nsAutoString unicodePath;
            inDestFile->GetPath(unicodePath);
            filesFolder->InitWithPath(unicodePath);
      
            nsAutoString leafName;
            filesFolder->GetLeafName(leafName);
            nsAutoString nameMinusExt(leafName);
            PRInt32 index = nameMinusExt.RFind(".");
            if (index >= 0)
            {
                nameMinusExt.Left(nameMinusExt, index);
            }

            nameMinusExt += NS_LITERAL_STRING(" Files");
            filesFolder->SetLeafName(nameMinusExt);
            PRBool exists = PR_FALSE;
            filesFolder->Exists(&exists);
            if (!exists)
            {
                rv = filesFolder->Create(nsILocalFile::DIRECTORY_TYPE, 0755);
                if (NS_FAILED(rv)) return rv;
            }
        }
        else
        {
            encodingFlags |= nsIWebBrowserPersist::ENCODE_FLAGS_FORMATTED |
                     nsIWebBrowserPersist::ENCODE_FLAGS_ABSOLUTE_LINKS |
                     nsIWebBrowserPersist::ENCODE_FLAGS_NOFRAMES_CONTENT;
        }

        rv = webPersist->SaveDocument (domDocument, inDestFile, filesFolder,
                           contentType, encodingFlags, 80);
    }
  
    return rv;
}

static char*
GetFilePath (const char *filename)
{
    char *path, *download_dir;

    download_dir = eel_gconf_get_string (CONF_STATE_DOWNLOAD_DIR);
    if (!download_dir)
    {
        /* Emergency download destination */
        download_dir = g_strdup (g_get_home_dir ());
    }

    if (!strcmp (download_dir, "Desktop"))
    {
        if (eel_gconf_get_boolean (CONF_DESKTOP_IS_HOME_DIR))
        {
            path = g_build_filename 
                (g_get_home_dir (),
                 filename,
                 NULL);
        }
        else
        {
            path = g_build_filename 
                (g_get_home_dir (), "Desktop",
                 filename,
                 NULL);
        }
    }
    else
    {
        path = g_build_filename
            (gnome_vfs_expand_initial_tilde (download_dir),
             filename,
             NULL);
    }
    g_free (download_dir);

    return path;
}

nsresult BuildDownloadPath (const char *defaultFileName, nsILocalFile **_retval)
{
    char *path;
    int i = 0;

    path = GetFilePath (defaultFileName);
    
    while (g_file_test (path, G_FILE_TEST_EXISTS))
    {
        g_free (path);

        char *tmp_path;
        tmp_path = g_strdup_printf ("%s.%d", defaultFileName,  ++i);
        path = GetFilePath (tmp_path);
        g_free (tmp_path);
    }

    nsCOMPtr <nsILocalFile> destFile (do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
    destFile->InitWithNativePath (nsDependentCString (path));
    g_free (path);

    NS_IF_ADDREF (*_retval = destFile);
    return NS_OK;
}