path: root/embed/ephy-embed-shell.c

/*
 *  Copyright (C) 2000-2003 Marco Pesenti Gritti
 *
 *  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.
 *
 *  $Id$
 */

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

#include "ephy-embed-shell.h"
#include "ephy-embed-factory.h"
#include "ephy-marshal.h"
#include "ephy-file-helpers.h"
#include "ephy-favicon-cache.h"
#include "mozilla-embed-single.h"
#include "downloader-view.h"
#include "ephy-encodings.h"
#include "ephy-debug.h"

#include <libxml/xmlreader.h>
#include <string.h>

#define EPHY_EMBED_SHELL_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_EMBED_SHELL, EphyEmbedShellPrivate))

struct EphyEmbedShellPrivate
{
    EphyHistory *global_history;
    DownloaderView *downloader_view;
    EphyFaviconCache *favicon_cache;
    EphyEmbedSingle *embed_single;
    EphyEncodings *encodings;
    GHashTable *mime_table;
};

static void ephy_embed_shell_class_init (EphyEmbedShellClass *klass);
static void ephy_embed_shell_init   (EphyEmbedShell *shell);

EphyEmbedShell *embed_shell = NULL;

static GObjectClass *parent_class = NULL;

GType
ephy_embed_shell_get_type (void)
{
       static GType type = 0;

    if (type == 0)
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyEmbedShellClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            (GClassInitFunc) ephy_embed_shell_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (EphyEmbedShell),
            0,    /* n_preallocs */
            (GInstanceInitFunc) ephy_embed_shell_init
        };

        type = g_type_register_static (G_TYPE_OBJECT,
                           "EphyEmbedShell",
                           &our_info, 0);
    }

    return type;
}

static void
ephy_embed_shell_finalize (GObject *object)
{
    EphyEmbedShell *shell = EPHY_EMBED_SHELL (object);

    LOG ("Unref history")
    if (shell->priv->global_history)
    {
        g_object_unref (shell->priv->global_history);
    }

    LOG ("Unref downloader")
    if (shell->priv->downloader_view)
    {
        g_object_remove_weak_pointer
            (G_OBJECT(shell->priv->downloader_view),
             (gpointer *) &shell->priv->downloader_view);
        g_object_unref (shell->priv->downloader_view);
    }

    LOG ("Unref favicon cache")
    if (shell->priv->favicon_cache)
    {
        g_object_unref (G_OBJECT (shell->priv->favicon_cache));
    }

    LOG ("Unref encodings")
    if (shell->priv->encodings)
    {
        g_object_unref (G_OBJECT (shell->priv->encodings));
    }

    LOG ("Unref embed single")
    if (shell->priv->embed_single)
    {
        g_object_unref (G_OBJECT (shell->priv->embed_single));
    }

    LOG ("Destroying mime type hashtable")
    if (shell->priv->mime_table)
    {
        g_hash_table_destroy (shell->priv->mime_table);
    }

    G_OBJECT_CLASS (parent_class)->finalize (object);
}

/**
 * ephy_embed_shell_get_favicon_cache:
 * @shell: the #EphyEmbedShell
 *
 * Returns the favicons cache.
 *
 * Return value: the favicons cache
 **/
GObject *
ephy_embed_shell_get_favicon_cache (EphyEmbedShell *shell)
{
    if (shell->priv->favicon_cache == NULL)
    {
        shell->priv->favicon_cache = ephy_favicon_cache_new ();
    }

    return G_OBJECT (shell->priv->favicon_cache);
}

EphyHistory *
ephy_embed_shell_get_global_history (EphyEmbedShell *shell)
{
    EphyEmbedShellClass *klass = EPHY_EMBED_SHELL_GET_CLASS (shell);
    return klass->get_global_history (shell);
}

GObject *
ephy_embed_shell_get_downloader_view (EphyEmbedShell *shell)
{
    EphyEmbedShellClass *klass = EPHY_EMBED_SHELL_GET_CLASS (shell);
    return klass->get_downloader_view (shell);
}

EphyEmbedSingle *
ephy_embed_shell_get_embed_single (EphyEmbedShell *shell)
{

    if (!shell->priv->embed_single)
    {
        shell->priv->embed_single = EPHY_EMBED_SINGLE
            (ephy_embed_factory_new_object ("EphyEmbedSingle"));
    }

    return shell->priv->embed_single;
}

static EphyHistory *
impl_get_global_history (EphyEmbedShell *shell)
{
    if (!shell->priv->global_history)
    {
        shell->priv->global_history = ephy_history_new ();
    }

    return shell->priv->global_history;
}

static GObject *
impl_get_downloader_view (EphyEmbedShell *shell)
{
    if (!shell->priv->downloader_view)
    {
        shell->priv->downloader_view = downloader_view_new ();
        g_object_add_weak_pointer
            (G_OBJECT(shell->priv->downloader_view),
             (gpointer *)&shell->priv->downloader_view);
    }

    return G_OBJECT (shell->priv->downloader_view);
}

GObject *
ephy_embed_shell_get_encodings (EphyEmbedShell *shell)
{
    if (shell->priv->encodings == NULL)
    {
        shell->priv->encodings = ephy_encodings_new ();
    }

    return G_OBJECT (shell->priv->encodings);
}

static void
load_mime_from_xml (EphyEmbedShell *shell)
{
    xmlTextReaderPtr reader;
    const char *xml_file;
    int ret;
    EphyMimePermission permission = EPHY_MIME_PERMISSION_UNKNOWN;

    xml_file = ephy_file ("mime-types-permissions.xml");
    if (xml_file == NULL)
    {
        g_warning ("MIME types permissions file not found!\n");
        return;
    }

    reader = xmlNewTextReaderFilename (xml_file);
    if (reader == NULL)
    {
        g_warning ("Could not load MIME types permissions file!\n");
        return;
    }

    ret = xmlTextReaderRead (reader);
    while (ret == 1)
    {
        const xmlChar *tag;
        xmlReaderTypes type;

        tag = xmlTextReaderConstName (reader);
        type = xmlTextReaderNodeType (reader);

        if (xmlStrEqual (tag, "safe") && type == XML_READER_TYPE_ELEMENT)
        {
            permission = EPHY_MIME_PERMISSION_SAFE;
        }
        else if (xmlStrEqual (tag, "unsafe") && type == XML_READER_TYPE_ELEMENT)
        {
            permission = EPHY_MIME_PERMISSION_UNSAFE;
        }
        else if (xmlStrEqual (tag, "mime-type"))
        {
            xmlChar *type;

            type = xmlTextReaderGetAttribute (reader, "type");
            g_hash_table_insert (shell->priv->mime_table,
                         type, GINT_TO_POINTER (permission));
        }

        ret = xmlTextReaderRead (reader);
    }

    xmlFreeTextReader (reader);
}

EphyMimePermission
ephy_embed_shell_check_mime (EphyEmbedShell *shell, const char *mime_type)
{
    EphyMimePermission permission;
    gpointer tmp;

    if (shell->priv->mime_table == NULL)
    {
        shell->priv->mime_table = g_hash_table_new_full
            (g_str_hash, g_str_equal, xmlFree, NULL);
        load_mime_from_xml (shell);
    }

    tmp = g_hash_table_lookup (shell->priv->mime_table, mime_type);
    if (tmp == NULL)
    {
        permission = EPHY_MIME_PERMISSION_UNKNOWN;
    }
    else
    {
        permission = GPOINTER_TO_INT (tmp);
    }

    return permission;
}

static void
ephy_embed_shell_init (EphyEmbedShell *shell)
{
    shell->priv = EPHY_EMBED_SHELL_GET_PRIVATE (shell);

    /* globally accessible singleton */
    g_assert (embed_shell == NULL);
    embed_shell = shell;

    shell->priv->global_history = NULL;
    shell->priv->downloader_view = NULL;
    shell->priv->favicon_cache = NULL;
    shell->priv->encodings = NULL;
    shell->priv->mime_table = NULL;
}

static void
ephy_embed_shell_class_init (EphyEmbedShellClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = (GObjectClass *) g_type_class_peek_parent (klass);

    object_class->finalize = ephy_embed_shell_finalize;

    klass->get_downloader_view = impl_get_downloader_view;
    klass->get_global_history = impl_get_global_history;

    g_type_class_add_private (object_class, sizeof (EphyEmbedShellPrivate));
}