path: root/embed/mozilla/ContentHandler.cpp

/*
 *  Copyright (C) 2001 Philip Langdale
 *  Copyright (C) 2003 Marco Pesenti Gritti
 *  Copyright (C) 2003 Xan Lopez
 *  Copyright (C) 2004 Christian Persch
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *  $Id$
 */

#include "mozilla-config.h"

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gtk/gtkimage.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtkstock.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkdialog.h>
#include <libgnomevfs/gnome-vfs-mime.h>
#include <libgnomevfs/gnome-vfs-utils.h>
#include <glib/gi18n.h>

#include <nsMemory.h>
#include <nsIURL.h>
#include <nsILocalFile.h>
#include <nsIMIMEInfo.h>
#include <nsIInterfaceRequestorUtils.h>
#include <nsCExternalHandlerService.h>

#include "ephy-prefs.h"
#include "ephy-embed-single.h"
#include "ephy-embed-shell.h"
#include "ephy-file-chooser.h"
#include "ephy-stock-icons.h"
#include "ephy-gui.h"
#include "ephy-debug.h"
#include "eel-gconf-extensions.h"

#include "ContentHandler.h"
#include "MozDownload.h"
#include "EphyUtils.h"

class GContentHandler;

NS_IMPL_ISUPPORTS1(GContentHandler, nsIHelperAppLauncherDialog)

#ifdef MOZ_NSIMIMEINFO_NSACSTRING_
GContentHandler::GContentHandler()
{
    LOG ("GContentHandler ctor (%p)", this)
}
#else
GContentHandler::GContentHandler() : mMimeType(nsnull)
{
    LOG ("GContentHandler ctor (%p)", this)
}
#endif

GContentHandler::~GContentHandler()
{
    LOG ("GContentHandler dtor (%p)", this)

#ifndef MOZ_NSIMIMEINFO_NSACSTRING_
    nsMemory::Free (mMimeType);
#endif
}

////////////////////////////////////////////////////////////////////////////////
// begin nsIHelperAppLauncher impl
////////////////////////////////////////////////////////////////////////////////

/* void show (in nsIHelperAppLauncher aLauncher, in nsISupports aContext); */
NS_IMETHODIMP GContentHandler::Show(nsIHelperAppLauncher *aLauncher,
                    nsISupports *aContext,
                    PRBool aForced)
{
    nsresult rv;
    EphyEmbedSingle *single;
    gboolean handled = FALSE;

    mContext = aContext;
    mLauncher = aLauncher;
    rv = Init ();
    NS_ENSURE_SUCCESS (rv, rv);

    single = EPHY_EMBED_SINGLE (ephy_embed_shell_get_embed_single (embed_shell));
#ifdef MOZ_NSIMIMEINFO_NSACSTRING_
    g_signal_emit_by_name (single, "handle_content", mMimeType.get(),
                   mUrl.get(), &handled);
#else
    g_signal_emit_by_name (single, "handle_content", mMimeType,
                   mUrl.get(), &handled);
#endif

    if (!handled)
    {
        MIMEDoAction ();
    }
    else
    {
        mLauncher->Cancel ();
    }

    return NS_OK;
}

/* nsILocalFile promptForSaveToFile (in nsISupports aWindowContext, in wstring aDefaultFile, in wstring aSuggestedFileExtension); */
NS_IMETHODIMP GContentHandler::PromptForSaveToFile(
                    nsIHelperAppLauncher *aLauncher,                
                    nsISupports *aWindowContext,
                    const PRUnichar *aDefaultFile,
                    const PRUnichar *aSuggestedFileExtension,
                    nsILocalFile **_retval)
{
    EphyFileChooser *dialog;
    gint response;
    char *filename = NULL;
    nsEmbedCString defaultFile;

    NS_UTF16ToCString (nsEmbedString (aDefaultFile),
               NS_CSTRING_ENCODING_UTF8, defaultFile);

    if (mAction != CONTENT_ACTION_SAVEAS)
    {
        return BuildDownloadPath (defaultFile.get(), _retval);
    }

    nsCOMPtr<nsIDOMWindow> parentDOMWindow = do_GetInterface (aWindowContext);
    GtkWidget *parentWindow = GTK_WIDGET (EphyUtils::FindGtkParent (parentDOMWindow));

    dialog = ephy_file_chooser_new (_("Save"), parentWindow,
                    GTK_FILE_CHOOSER_ACTION_SAVE,
                    CONF_STATE_SAVE_DIR,
                    EPHY_FILE_FILTER_ALL);
    gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (dialog), defaultFile.get());

    do
    {
        g_free (filename);
        response = gtk_dialog_run (GTK_DIALOG (dialog));
        filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
    } while (response == GTK_RESPONSE_ACCEPT
         && !ephy_gui_confirm_overwrite_file (GTK_WIDGET (dialog), filename));

    if (response == GTK_RESPONSE_ACCEPT)
    {
        nsCOMPtr <nsILocalFile> destFile (do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
        NS_ENSURE_TRUE (destFile, NS_ERROR_FAILURE);

        destFile->InitWithNativePath (nsEmbedCString (filename));
        g_free (filename);

        NS_IF_ADDREF (*_retval = destFile);

        gtk_widget_destroy (GTK_WIDGET (dialog));

        return NS_OK;
    }
    else
    {
        gtk_widget_destroy (GTK_WIDGET (dialog));
        g_free (filename);

        return NS_ERROR_FAILURE;
    }
}

NS_METHOD GContentHandler::LaunchHelperApp (void)
{
    nsCOMPtr<nsIExternalHelperAppService> helperService;

    helperService = do_GetService (NS_EXTERNALHELPERAPPSERVICE_CONTRACTID);
    NS_ENSURE_TRUE (helperService, NS_ERROR_FAILURE);

    nsCOMPtr<nsPIExternalAppLauncher> appLauncher = do_QueryInterface (helperService);
    NS_ENSURE_TRUE (appLauncher, NS_ERROR_FAILURE);
    appLauncher->DeleteTemporaryFileOnExit(mTempFile);

    GList *params = NULL;
    char *param;
    
    param = gnome_vfs_make_uri_canonical (mUrl.get());
    params = g_list_append (params, param);
    gnome_vfs_mime_application_launch (mHelperApp, params);
    g_free (param);
    g_list_free (params);

    mLauncher->Cancel();

    return NS_OK;
}

NS_METHOD GContentHandler::CheckAppSupportScheme (void)
{
    GList *l;

    mAppSupportScheme = PR_FALSE;   

    if (!mHelperApp) return NS_OK;

    if (mHelperApp->expects_uris != GNOME_VFS_MIME_APPLICATION_ARGUMENT_TYPE_URIS)
        return NS_OK;
    
    for (l = mHelperApp->supported_uri_schemes; l != NULL; l = l->next)
    {
        char *uri_scheme = (char *)l->data;

        if (strcmp (mScheme.get(), uri_scheme) == 0)
        {
            mAppSupportScheme = PR_TRUE;
        }
    }

    return NS_OK;
}

NS_METHOD GContentHandler::Init (void)
{
    nsresult rv;

    NS_ENSURE_TRUE (mLauncher, NS_ERROR_FAILURE);

    nsCOMPtr<nsIMIMEInfo> MIMEInfo;
    mLauncher->GetMIMEInfo (getter_AddRefs(MIMEInfo));
    NS_ENSURE_TRUE (MIMEInfo, NS_ERROR_FAILURE);

#ifdef MOZ_NSIMIMEINFO_NSACSTRING_
    rv = MIMEInfo->GetMIMEType (mMimeType);
#else
    rv = MIMEInfo->GetMIMEType (&mMimeType);
#endif

    mLauncher->GetTargetFile (getter_AddRefs(mTempFile));

    mLauncher->GetSource (getter_AddRefs(mUri));
    NS_ENSURE_TRUE (mUri, NS_ERROR_FAILURE);
    
    rv = mUri->GetSpec (mUrl);
    rv = mUri->GetScheme (mScheme);

    return NS_OK;
}

NS_METHOD GContentHandler::MIMEConfirmAction ()
{
    GtkWidget *dialog;
    GtkWidget *hbox, *vbox, *label, *image;
    const char *action_label;
    char *text;
    int response;

    nsCOMPtr<nsIDOMWindow> parentDOMWindow = do_GetInterface (mContext);
    GtkWindow *parentWindow = GTK_WINDOW (EphyUtils::FindGtkParent(parentDOMWindow));

    action_label =  (mAction == CONTENT_ACTION_OPEN) ||
            (mAction == CONTENT_ACTION_OPEN_TMP) ?
            GTK_STOCK_OPEN : EPHY_STOCK_DOWNLOAD;

    dialog = gtk_dialog_new_with_buttons
        ("", parentWindow, GTK_DIALOG_NO_SEPARATOR,
         _("_Save As..."), CONTENT_ACTION_SAVEAS,
         GTK_STOCK_CANCEL, CONTENT_ACTION_NONE,
         action_label, mAction, NULL);
    gtk_dialog_set_default_response (GTK_DIALOG (dialog), (guint)mAction);
    
    gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
    gtk_container_set_border_width (GTK_CONTAINER (dialog), 5);
    gtk_box_set_spacing (GTK_BOX (GTK_DIALOG (dialog)->vbox), 14);

    hbox = gtk_hbox_new (FALSE, 6);
    gtk_widget_show (hbox);
    gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), hbox,
                TRUE, TRUE, 0);

    if (mPermission == EPHY_MIME_PERMISSION_UNSAFE && mHelperApp)
    {
        text = g_strdup_printf ("<span weight=\"bold\" size=\"larger\">%s</span>\n\n%s",
                    _("Download the unsafe file?"),
                    _("This type of file could potentially damage your documents "
                      "or invade your privacy. "
                      "It's not safe to open it directly. You "
                      "can save it instead."));
    }
    else if (mAction == CONTENT_ACTION_OPEN_TMP)
    {
        text = g_strdup_printf ("<span weight=\"bold\" size=\"larger\">%s</span>\n\n%s",
                    _("Open the file in another application?"),
                    _("It's not possible to view this file type directly "
                      "in the browser. You can open it with another "
                      "application or save it."));
    }
    else
    {
        text = g_strdup_printf ("<span weight=\"bold\" size=\"larger\">%s</span>\n\n%s",
                    _("Download the file?"),
                    _("It's not possible to view this file because there is no "
                      "application installed that can open it. "
                      "You can save it instead."));
    }

    image = gtk_image_new_from_stock (GTK_STOCK_DIALOG_WARNING,
                      GTK_ICON_SIZE_DIALOG);
    gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
    gtk_widget_show (image);
    gtk_box_pack_start (GTK_BOX (hbox), image, TRUE, TRUE, 0);

    vbox = gtk_vbox_new (FALSE, 6);
    gtk_widget_show (vbox);
    gtk_box_pack_start (GTK_BOX (hbox), vbox, TRUE, TRUE, 0);

    label = gtk_label_new (NULL);
    gtk_label_set_selectable (GTK_LABEL (label), TRUE);
    gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
    gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
    gtk_label_set_markup (GTK_LABEL (label), text);
    g_free (text);

    gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, TRUE, 0);
    gtk_widget_show (label);

    response = gtk_dialog_run (GTK_DIALOG (dialog));

    if (response == GTK_RESPONSE_DELETE_EVENT)
    {
        mAction = CONTENT_ACTION_NONE;
    }
    else
    {
        mAction = (ContentAction)response;
    }

    gtk_widget_destroy (dialog);

    return NS_OK;
}

NS_METHOD GContentHandler::MIMEDoAction (void)
{
    gboolean auto_downloads;

    if (eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_SAVE_TO_DISK)) return NS_OK;

    auto_downloads = eel_gconf_get_boolean (CONF_AUTO_DOWNLOADS);

#ifdef MOZ_NSIMIMEINFO_NSACSTRING_
    mHelperApp = gnome_vfs_mime_get_default_application (mMimeType.get());
    mPermission = ephy_embed_shell_check_mime (embed_shell, mMimeType.get());
#else
    mHelperApp = gnome_vfs_mime_get_default_application (mMimeType);
    mPermission = ephy_embed_shell_check_mime (embed_shell, mMimeType);
#endif

    CheckAppSupportScheme ();

    if (auto_downloads)
    {
        mAction = CONTENT_ACTION_OPEN;
    }
    else
    {
        mAction = CONTENT_ACTION_OPEN_TMP;
    }

    if (!mHelperApp || mPermission == EPHY_MIME_PERMISSION_UNSAFE)
    {
        mAction = CONTENT_ACTION_DOWNLOAD;
    }

    if (!auto_downloads || mAction == CONTENT_ACTION_DOWNLOAD)
    {
        MIMEConfirmAction ();
    }

    nsCOMPtr<nsIMIMEInfo> mimeInfo;
    mLauncher->GetMIMEInfo(getter_AddRefs(mimeInfo));
    NS_ENSURE_TRUE (mimeInfo, NS_ERROR_FAILURE);

    if (mAction == CONTENT_ACTION_OPEN)
    {
        nsEmbedString desc;

        NS_CStringToUTF16 (nsEmbedCString ("gnome-default"),
                       NS_CSTRING_ENCODING_UTF8, desc);

        /* HACK we use the application description to ask
           MozDownload to open the file when download
           is finished */
#ifdef MOZ_NSIMIMEINFO_NSACSTRING_
        mimeInfo->SetApplicationDescription (desc);
#else
        mimeInfo->SetApplicationDescription (desc.get());
#endif
    }
    else
    {
#ifdef MOZ_NSIMIMEINFO_NSACSTRING_
        mimeInfo->SetApplicationDescription (nsEmbedString ());
#else
        mimeInfo->SetApplicationDescription (nsnull);
#endif
    }

    if (mAction == CONTENT_ACTION_OPEN)
    {
        if (mAppSupportScheme)
        {
            LaunchHelperApp ();
        }
        else
        {
            mLauncher->SaveToDisk (nsnull, PR_FALSE);
        }
    }
    else if (mAction == CONTENT_ACTION_OPEN_TMP)
    {
        if (mAppSupportScheme)
        {
            LaunchHelperApp ();
        }
        else
        {
            mLauncher->LaunchWithApplication (nsnull, PR_FALSE);
        }
    }
    else if (mAction == CONTENT_ACTION_NONE)
    {
        mLauncher->Cancel ();
    }
    else
    {
        mLauncher->SaveToDisk (nsnull, PR_FALSE);
    }

    return NS_OK;
}