path: root/embed/mozilla/mozilla-notifiers.cpp

/*
*  Copyright © 2000 Nate Case
*  Copyright © 2000-2004 Marco Pesenti Gritti
*  Copyright © 2003, 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"
#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <glib/gi18n.h>
#include <gdk/gdkx.h>
#include <gtk/gtksettings.h>

#include <nsCOMPtr.h>
#include <nsIPrefService.h>
#include <nsIServiceManager.h>
#include <nsMemory.h>
#include <nsServiceManagerUtils.h>

#include "eel-gconf-extensions.h"
#include "ephy-debug.h"
#include "ephy-embed-prefs.h"
#include "ephy-embed-shell.h"
#include "ephy-encodings.h"
#include "ephy-langs.h"
#include "ephy-node.h"
#include "ephy-prefs.h"

#include "mozilla-notifiers.h"

/* define to migrate epiphany 1.0 font preferences */
#define MIGRATE_PIXEL_SIZE

#define MAX_FONT_SIZE   128

/* Keeps the list of the notifiers we installed for mozilla prefs */
/* to be able to remove them when exiting */
static GList *notifiers = NULL;
static nsIPrefBranch *gPrefBranch;

typedef struct
{
    char *gconf_key;
    char *mozilla_pref;
    PrefValueTransformFunc func;
    gpointer user_data;
    guint cnxn_id;
} PrefData;

static void
free_pref_data (PrefData *data)
{
    g_free (data->gconf_key);
    g_free (data->mozilla_pref);
    g_free (data);
}

static gboolean
transform_accept_languages_list (GConfEntry *gcentry,
                 GValue *value,
                 gpointer user_data)
{
    GConfValue *gcvalue;
    GArray *array;
    GSList *languages, *l;
    char **langs;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_LIST ||
        gconf_value_get_list_type (gcvalue) != GCONF_VALUE_STRING) return FALSE;

    languages = gconf_value_get_list (gcvalue);

    array = g_array_new (TRUE, FALSE, sizeof (char *));

    for (l = languages; l != NULL; l = l->next)
    {
        const char *lang;

        lang = gconf_value_get_string ((GConfValue *) l->data);

        if (lang != NULL && strcmp (lang, "system") == 0)
        {
            ephy_langs_append_languages (array);
        }
        else if (lang != NULL && lang[0] != '\0')
        {
            char *str;
            str = g_ascii_strdown (lang, -1);
            g_array_append_val (array, str);
        }
    }

    ephy_langs_sanitise (array);

    langs = (char **) g_array_free (array, FALSE);

    g_value_init (value, G_TYPE_STRING);
    g_value_take_string (value, g_strjoinv (",", langs));

    g_strfreev (langs);

    return TRUE;
}

static gboolean
transform_cache_size (GConfEntry *gcentry,
              GValue *value,
              gpointer user_data)
{
    GConfValue *gcvalue;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_INT) return FALSE;

    g_value_init (value, G_TYPE_INT);
    g_value_set_int (value, gconf_value_get_int (gcvalue) * 1024);

    return TRUE;
}

static gboolean
transform_cookies_accept_mode (GConfEntry *gcentry,
                   GValue *value,
                   gpointer user_data)

{
    GConfValue *gcvalue;
    const char *mode;
    int mozilla_mode = 0;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
         gcvalue->type != GCONF_VALUE_STRING) return FALSE;

    mode = gconf_value_get_string (gcvalue);
    if (mode == NULL) return FALSE;

    if (strcmp (mode, "anywhere") == 0)
    {
        mozilla_mode = 0;
    }
    else if (strcmp (mode, "current site") == 0)
    {
        mozilla_mode = 1;
    }
    else if (strcmp (mode, "nowhere") == 0)
    {
        mozilla_mode = 2;
    }

    g_value_init (value, G_TYPE_INT);
    g_value_set_int (value, mozilla_mode);

    return TRUE;
}

static gboolean
transform_encoding (GConfEntry *gcentry,
            GValue *value,
            gpointer user_data)
{
    GConfValue *gcvalue;
    EphyEncodings *encodings;
    EphyNode *node;
    const char *code;
    gboolean is_autodetector;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_STRING) return FALSE;

    code = gconf_value_get_string (gcvalue);
    if (code == NULL) return FALSE;

    encodings = EPHY_ENCODINGS (ephy_embed_shell_get_encodings (embed_shell));
    node = ephy_encodings_get_node (encodings, code, FALSE);
    if (node == NULL) return FALSE;

    is_autodetector = ephy_node_get_property_boolean (node, EPHY_NODE_ENCODING_PROP_IS_AUTODETECTOR);
    if (is_autodetector != GPOINTER_TO_INT (user_data)) return FALSE;

    g_value_init (value, G_TYPE_STRING);
    g_value_set_string (value, code);

    return TRUE;
}

static gboolean
transform_image_animation_mode (GConfEntry *gcentry,
                    GValue *value,
                    gpointer user_data)

{
    GConfValue *gcvalue;
    const char *mode;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_STRING) return FALSE;

    mode = gconf_value_get_string (gcvalue);
    if (mode == NULL) return FALSE;

    if (strcmp (mode, "disabled") == 0)
    {
        mode = "none";
    }

    g_value_init (value, G_TYPE_STRING);
    g_value_set_string (value, mode);

    return TRUE;
}

static gboolean
transform_proxy_ignore_list (GConfEntry *gcentry,
                 GValue *value,
                 gpointer user_data)
{
    GConfValue *gcvalue;
    GArray *array;
    GSList *hosts, *l;
    char **strings;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_LIST ||
        gconf_value_get_list_type (gcvalue) != GCONF_VALUE_STRING) return FALSE;

    hosts = gconf_value_get_list (gcvalue);

    array = g_array_new (TRUE, FALSE, sizeof (char *));

    for (l = hosts; l != NULL; l = l->next)
    {
        const char *host;

        host = gconf_value_get_string ((GConfValue *) l->data);

        if (host != NULL && host[0] != '\0')
        {
            g_array_append_val (array, host);
        }
    }

    strings = (char **) g_array_free (array, FALSE);

    g_value_init (value, G_TYPE_STRING);
    g_value_take_string (value, g_strjoinv (",", strings));

    /* the strings themselves are const */
    g_free (strings);

    return TRUE;
}

static gboolean
transform_proxy_mode (GConfEntry *gcentry,
              GValue *value,
              gpointer user_data)
{
    GConfValue *gcvalue;
    const char *mode;
    int mozilla_mode = 0;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_STRING) return FALSE;

    mode = gconf_value_get_string (gcvalue);
    if (mode == NULL) return FALSE;

    if (strcmp (mode, "manual") == 0)
    {
        mozilla_mode = 1;
    }
    else if (strcmp (mode, "auto") == 0)
    {
        mozilla_mode = 2;
    }

    g_value_init (value, G_TYPE_INT);
    g_value_set_int (value, mozilla_mode);

    return TRUE;
}

static gboolean
transform_use_own_fonts (GConfEntry *gcentry,
             GValue *value,
             gpointer user_data)
{
    GConfValue *gcvalue;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_BOOL) return FALSE;

    g_value_init (value, G_TYPE_INT);
    g_value_set_int (value, gconf_value_get_bool (gcvalue) ? 0 : 1);

    return TRUE;
}

extern "C" gboolean
mozilla_notifier_transform_bool (GConfEntry *gcentry,
                 GValue *value,
                 gpointer user_data)
{
    GConfValue *gcvalue;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_BOOL) return FALSE;

    g_value_init (value, G_TYPE_BOOLEAN);
    g_value_set_boolean (value, gconf_value_get_bool (gcvalue));

    return TRUE;
}

extern "C" gboolean
mozilla_notifier_transform_bool_invert (GConfEntry *gcentry,
                    GValue *value,
                    gpointer user_data)
{
    GConfValue *gcvalue;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_BOOL) return FALSE;

    g_value_init (value, G_TYPE_BOOLEAN);
    g_value_set_boolean (value, !gconf_value_get_bool (gcvalue));

    return TRUE;
}

extern "C" gboolean
mozilla_notifier_transform_int (GConfEntry *gcentry,
                GValue *value,
                gpointer user_data)
{
    GConfValue *gcvalue;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_INT) return FALSE;

    g_value_init (value, G_TYPE_INT);
    g_value_set_int (value, gconf_value_get_int (gcvalue));

    return TRUE;
}

extern "C" gboolean
mozilla_notifier_transform_string (GConfEntry *gcentry,
                   GValue *value,
                   gpointer user_data)
{
    GConfValue *gcvalue;
    const char *str;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_STRING) return FALSE;

    str = gconf_value_get_string (gcvalue);
    if (str == NULL) return FALSE;

    g_value_init (value, G_TYPE_STRING);
    g_value_set_string (value, str);

    return TRUE;
}

static const PrefData notifier_entries[] =
{
    { CONF_BROWSE_WITH_CARET,
      "accessibility.browsewithcaret",
      mozilla_notifier_transform_bool },
    { CONF_NETWORK_CACHE_SIZE,
      "browser.cache.disk.capacity",
      transform_cache_size },
    { CONF_RENDERING_USE_OWN_COLORS,
      "browser.display.use_document_colors",
      mozilla_notifier_transform_bool_invert },
    { CONF_RENDERING_USE_OWN_FONTS,
      "browser.display.use_document_fonts",
      transform_use_own_fonts },
    { CONF_SECURITY_ALLOW_POPUPS,
      "dom.disable_open_during_load",
      mozilla_notifier_transform_bool_invert },
    { CONF_IMAGE_ANIMATION_MODE,
      "image.animation_mode",
      transform_image_animation_mode },
    { CONF_RENDERING_LANGUAGE,
      "intl.accept_languages",
      transform_accept_languages_list },
    { CONF_LANGUAGE_DEFAULT_ENCODING,
      "intl.charset.default",
      transform_encoding,
      GINT_TO_POINTER (FALSE) },
    { CONF_LANGUAGE_AUTODETECT_ENCODING,
      "intl.charset.detector",
      transform_encoding,
      GINT_TO_POINTER (TRUE) },
    { CONF_SECURITY_JAVA_ENABLED,
      "security.enable_java",
      mozilla_notifier_transform_bool },
    { CONF_SECURITY_JAVASCRIPT_ENABLED,
      "javascript.enabled",
      mozilla_notifier_transform_bool },
    { CONF_NETWORK_PROXY_AUTO_URL,
      "network.proxy.autoconfig_url",
      mozilla_notifier_transform_string },
    { CONF_NETWORK_HTTP_PROXY,
      "network.proxy.http",
      mozilla_notifier_transform_string },
    { CONF_NETWORK_HTTP_PROXY_PORT,
      "network.proxy.http_port",
      mozilla_notifier_transform_int },
    { CONF_NETWORK_FTP_PROXY,
      "network.proxy.ftp",
      mozilla_notifier_transform_string },
    { CONF_NETWORK_FTP_PROXY_PORT,
      "network.proxy.ftp_port",
      mozilla_notifier_transform_int },
    { CONF_NETWORK_SSL_PROXY,
      "network.proxy.ssl",
      mozilla_notifier_transform_string },
    { CONF_NETWORK_SSL_PROXY_PORT,
      "network.proxy.ssl_port",
      mozilla_notifier_transform_int },
    { CONF_NETWORK_SOCKS_PROXY,
      "network.proxy.socks",
      mozilla_notifier_transform_string },
    { CONF_NETWORK_SOCKS_PROXY_PORT,
      "network.proxy.socks_port",
      mozilla_notifier_transform_int },
    { CONF_NETWORK_PROXY_IGNORE_HOSTS,
      "network.proxy.no_proxies_on",
      transform_proxy_ignore_list },
    { CONF_NETWORK_PROXY_MODE,
      "network.proxy.type",
      transform_proxy_mode },
    { CONF_SECURITY_COOKIES_ACCEPT,
      "network.cookie.cookieBehavior",
      transform_cookies_accept_mode },
    { CONF_PRIVACY_REMEMBER_PASSWORDS,
      "signon.rememberSignons",
      mozilla_notifier_transform_bool }
};

gboolean
mozilla_pref_set (const char *pref,
          const GValue *value)
{
    NS_ENSURE_TRUE (gPrefBranch, FALSE);

    g_return_val_if_fail (pref != NULL, FALSE);
    g_return_val_if_fail (value != NULL, FALSE);

    nsresult rv;
    switch (G_VALUE_TYPE (value))
    {
        case G_TYPE_INT:
        {
            PRInt32 old_value = 0;
            PRInt32 new_value = g_value_get_int (value);
            rv = gPrefBranch->GetIntPref (pref, &old_value);
            if (NS_FAILED (rv) || old_value != new_value)
            {
                rv = gPrefBranch->SetIntPref (pref, new_value);
            }
            break;
        }
        case G_TYPE_BOOLEAN:
        {
            PRBool old_value = PR_FALSE;
            PRBool new_value = g_value_get_boolean (value);
            rv = gPrefBranch->GetBoolPref (pref, &old_value);
            if (NS_FAILED (rv) || old_value != new_value)
            {
                rv = gPrefBranch->SetBoolPref (pref, new_value);
            }
            break;
        }
        case G_TYPE_STRING:
        {
            const char *new_value = g_value_get_string (value);
            if (new_value == NULL)
            {
                rv = gPrefBranch->ClearUserPref (pref);
            }
            else
            {
                char *old_value = nsnull;

                rv = gPrefBranch->GetCharPref (pref, &old_value);
                if (NS_FAILED (rv) ||
                    old_value == nsnull ||
                    strcmp (old_value, new_value) != 0)
                {
                    rv = gPrefBranch->SetCharPref (pref, new_value);
                }

                if (old_value)
                {
                    nsMemory::Free (old_value);
                }
            }
            break;
        }
        default:
            g_return_val_if_reached (FALSE);
            rv = NS_ERROR_FAILURE;
            break;
    }

    return NS_SUCCEEDED (rv) != PR_FALSE;
}

static void
notify_cb (GConfClient *client,
       guint cnxn_id,
       GConfEntry *gcentry,
       PrefData *data)
{
    GValue value = { 0, };

    g_return_if_fail (gcentry != NULL);
    g_assert (data != NULL);

    if (data->func (gcentry, &value, data->user_data))
    {
        mozilla_pref_set (data->mozilla_pref, &value);
        g_value_unset (&value);
    }
    else
    {
        /* Reset the pref */
        NS_ENSURE_TRUE (gPrefBranch, );
        gPrefBranch->ClearUserPref (data->mozilla_pref);
    }
}

extern "C" guint
mozilla_notifier_add (const char *gconf_key,
              const char *mozilla_pref,
              PrefValueTransformFunc func,
              gpointer user_data)
{
    GConfClient *client;
    PrefData *data;
    GError *error = NULL;
    guint cnxn_id;

    g_return_val_if_fail (gconf_key != NULL, 0);
    g_return_val_if_fail (mozilla_pref != NULL, 0);
    g_return_val_if_fail (func, 0);

    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, 0);

    /* FIXME: use slice allocator */
    data = g_new (PrefData, 1);
    data->gconf_key = g_strdup (gconf_key);
    data->mozilla_pref = g_strdup (mozilla_pref);
    data->func = func;
    data->user_data = user_data;

    cnxn_id = gconf_client_notify_add (client, gconf_key,
                       (GConfClientNotifyFunc) notify_cb,
                       data, (GFreeFunc) free_pref_data,
                       &error);
    if (eel_gconf_handle_error (&error))
    {
        if (cnxn_id != EEL_GCONF_UNDEFINED_CONNECTION)
        {
            gconf_client_notify_remove (client, cnxn_id);
        }

        return 0;
    }

    data->cnxn_id = cnxn_id;
    notifiers = g_list_prepend (notifiers, data);

    gconf_client_notify (client, gconf_key);

    return cnxn_id;
}

static int
find_data (const PrefData *a,
       gconstpointer idptr)
{
    return a->cnxn_id != GPOINTER_TO_UINT (idptr);
}

extern "C" void
mozilla_notifier_remove (guint id)
{
    GList *l;

    g_return_if_fail (id != 0);

    l = g_list_find_custom (notifiers, GUINT_TO_POINTER (id),
                (GCompareFunc) find_data);
    g_return_if_fail (l != NULL);

    notifiers = g_list_delete_link (notifiers, l);
    eel_gconf_notification_remove (id);
}

#ifdef MIGRATE_PIXEL_SIZE

#define INT_ROUND(a) gint((a) + 0.5f)

/**
*  This function gets the dpi in the same way that mozilla gets the dpi,
*  this allows us to convert from pixels to points easily
*/
static gint
mozilla_get_dpi ()
{
    GtkSettings* settings = gtk_settings_get_default ();
    gint dpi = 0;

    /* Use the gdk-xft-dpi setting if it is set */
    if (g_object_class_find_property (G_OBJECT_GET_CLASS (G_OBJECT (settings)),
                      "gtk-xft-dpi"))
    {
        g_object_get (G_OBJECT (settings), "gtk-xft-dpi", &dpi, (char *) NULL);
        if (dpi) return INT_ROUND (dpi / PANGO_SCALE);
    }

    /* Fall back to what xft thinks it is */
    char *val = XGetDefault (GDK_DISPLAY (), "Xft", "dpi");
    if (val)
    {
        char *e;
        double d = strtod(val, &e);
        if (e != val) return INT_ROUND (d);
    }

    /* Fall back to calculating manually from the gdk screen settings */
    float screenWidthIn = float (gdk_screen_width_mm()) / 25.4f;
    return INT_ROUND (gdk_screen_width() / screenWidthIn);
}

static void
migrate_font_gconf_key (const char *pixel_key,
            const char *point_key)
{
    int size;

    size = eel_gconf_get_integer (pixel_key);

    if (size > 0)
    {
        /* Use doubles to get more accurate arithmetic */
        double dpi   = (double) mozilla_get_dpi ();
        double value = (double) eel_gconf_get_integer (pixel_key);
        gint point = INT_ROUND ((value * 72) / dpi);

        eel_gconf_set_integer (point_key, point);
    }
}

#endif

static gboolean
parse_pango_font (const char *font,
          char **name,
          int *size)
{
    PangoFontMask mask = (PangoFontMask) (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_SIZE);

    PangoFontDescription *desc = pango_font_description_from_string (font);
    if (desc == NULL) return FALSE;

    if ((pango_font_description_get_set_fields (desc) & mask) != mask)
    {
        pango_font_description_free (desc);
        return FALSE;
    }
                
    *size = PANGO_PIXELS (pango_font_description_get_size (desc));
    *name = g_strdup (pango_font_description_get_family (desc));

    pango_font_description_free (desc);

    LOG ("Parsed pango font description '%s' -> name:%s, size:%d",
         font, *name ? *name : "-", *size);

    return *name != NULL && *size > 0;
}

typedef struct
{
    guint cnxn_id;
    char **font_name_prefs;
    char **font_size_prefs;
    char *font_name;
    int font_size;
} DesktopFontData;

static gboolean
transform_font_name (GConfEntry *gcentry,
             GValue *value,
             gpointer user_data)
{
    DesktopFontData *data = (DesktopFontData *) user_data;
    GConfValue *gcvalue;
    const char *font_name;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gconf_entry_get_is_default (gcentry) ||
        gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_STRING)
    {
        font_name = data->font_name;
    }
    else
    {
        font_name = gconf_value_get_string (gcvalue);
        if ((font_name == NULL || font_name[0] == '\0'))
        {
            font_name = data->font_name;
        }
    }

    LOG ("%s value for key '%s'",
         gconf_entry_get_is_default (gcentry) ? "default" : "NON-default",
         gconf_entry_get_key (gcentry));

    if (font_name == NULL) return FALSE;

    LOG ("Inferred font name '%s' for key '%s'",
         font_name, gconf_entry_get_key (gcentry));

    g_value_init (value, G_TYPE_STRING);
    g_value_set_string (value, font_name);

    return TRUE;
}

static gboolean
transform_font_size (GConfEntry *gcentry,
             GValue *value,
             gpointer user_data)
{
    DesktopFontData *data = (DesktopFontData *) user_data;
    GConfValue *gcvalue;
    int size = 0;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gconf_entry_get_is_default (gcentry) ||
        gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_INT)
    {
        size = data->font_size;
    }
    else
    {
        size = gconf_value_get_int (gcvalue);
    }

    if (size <= 0 || size > MAX_FONT_SIZE) return FALSE;

    g_value_init (value, G_TYPE_INT);
    g_value_set_int (value, size);

    return TRUE;
}

static void
notify_desktop_font_cb (GConfClient *client,
            guint cnxn_id,
            GConfEntry *gcentry,
            DesktopFontData *data)
{
    GConfValue *gcvalue;
    char *name = NULL;
    int size = 0, i;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue != NULL &&
        gcvalue->type == GCONF_VALUE_STRING &&
        parse_pango_font (gconf_value_get_string (gcvalue), &name, &size))
    {
        LOG ("Desktop font %s -> name=%s, size=%d", 
             gconf_entry_get_key (gcentry), name, size);

        g_free (data->font_name);
        data->font_name = name;
        data->font_size = size;
    }
    else
    {
        g_free (name);

        g_free (data->font_name);
        data->font_name = NULL;
        data->font_size = 0;
    }

    for (i = 0; data->font_name_prefs[i] != NULL; ++i)
    {
        gconf_client_notify (client, data->font_name_prefs[i]);
    }
    for (i = 0; data->font_size_prefs[i] != NULL; ++i)
    {
        gconf_client_notify (client, data->font_size_prefs[i]);
    }
}

typedef struct
{
    guint cnxn_id;
    char **prefs;
    int size;
} MinimumFontSizeData;

static gboolean
transform_minimum_font_size (GConfEntry *gcentry,
                 GValue *value,
                 gpointer user_data)
{
    MinimumFontSizeData *data = (MinimumFontSizeData *) user_data;
    GConfValue *gcvalue;
    int size = 0;

    gcvalue = gconf_entry_get_value (gcentry);
    if (gcvalue == NULL ||
        gcvalue->type != GCONF_VALUE_INT)
    {
        size = data->size;
    }
    else
    {
        size = MAX (gconf_value_get_int (gcvalue),
                data->size);
    }

    if (size <= 0) return FALSE;

    g_value_init (value, G_TYPE_INT);
    g_value_set_int (value, size);

    return TRUE;
}

static void
notify_minimum_size_cb (GConfClient *client,
            guint cnxn_id,
            GConfEntry *entry,
            MinimumFontSizeData *data)
{
    GConfValue *gcvalue;
    int i;

    data->size = 0;

    gcvalue = gconf_entry_get_value (entry);
    /* happens on initial notify if the key doesn't exist */
    if (gcvalue != NULL &&
        gcvalue->type == GCONF_VALUE_INT)
    {
        data->size = gconf_value_get_int (gcvalue);
        data->size = MAX (data->size, 0);
    }

    LOG ("Minimum font size now %d", data->size);

    for (i = 0; data->prefs[i] != NULL; ++i)
    {
        gconf_client_notify (client, data->prefs[i]);
    }
}

static DesktopFontData *desktop_font_data;
static MinimumFontSizeData *minimum_font_size_data;

static void
mozilla_font_notifiers_init (void)
{
    static const char *types [] = { "variable", "monospace" };
    const EphyFontsLanguageInfo *font_languages;
    guint n_font_languages, i;

    eel_gconf_monitor_add ("/desktop/gnome/interface");

    font_languages = ephy_font_languages ();
    n_font_languages = ephy_font_n_languages ();

    desktop_font_data = g_new0 (DesktopFontData, 2);
    desktop_font_data[0].font_name_prefs = g_new0 (char*, n_font_languages + 1);
    desktop_font_data[0].font_size_prefs = g_new0 (char*, n_font_languages + 1);
    desktop_font_data[1].font_name_prefs = g_new0 (char*, n_font_languages + 1);
    desktop_font_data[1].font_size_prefs = g_new0 (char*, n_font_languages + 1);

    desktop_font_data[0].cnxn_id =
        eel_gconf_notification_add (CONF_DESKTOP_FONT_VARIABLE,
                        (GConfClientNotifyFunc) notify_desktop_font_cb,
                        &desktop_font_data[0]);
    eel_gconf_notify (CONF_DESKTOP_FONT_VARIABLE);

    desktop_font_data[1].cnxn_id =
        eel_gconf_notification_add (CONF_DESKTOP_FONT_MONOSPACE,
                        (GConfClientNotifyFunc) notify_desktop_font_cb,
                        &desktop_font_data[1]);
    eel_gconf_notify (CONF_DESKTOP_FONT_MONOSPACE);

    minimum_font_size_data = g_new0 (MinimumFontSizeData, 1);
    minimum_font_size_data->prefs = g_new0 (char*, n_font_languages + 1);

    minimum_font_size_data->cnxn_id =
        eel_gconf_notification_add (CONF_RENDERING_FONT_MIN_SIZE,
                        (GConfClientNotifyFunc) notify_minimum_size_cb,
                        minimum_font_size_data);
    eel_gconf_notify (CONF_RENDERING_FONT_MIN_SIZE);

#ifdef MIGRATE_PIXEL_SIZE
    gboolean migrate_size;

    migrate_size = (eel_gconf_get_integer (CONF_SCHEMA_VERSION)
            < EPIPHANY_SCHEMA_VERSION);
    if (migrate_size)
    {
        eel_gconf_set_integer (CONF_SCHEMA_VERSION, EPIPHANY_SCHEMA_VERSION);
    }
#endif

    for (i=0; i < n_font_languages; i++)
    {
        const char *code = font_languages[i].code;
        guint k;
        char key[255], pref[255];
#ifdef MIGRATE_PIXEL_SIZE
        char old_key[255];
#endif

        for (k = 0; k < G_N_ELEMENTS (types); k++)
        {
            g_snprintf (key, sizeof (key), "%s_%s_%s",
                    CONF_RENDERING_FONT, types[k], code);
            g_snprintf (pref, sizeof (pref), "font.name.%s.%s",
                    types[k], code);

            desktop_font_data[k].font_name_prefs[i] = g_strdup (key);

            mozilla_notifier_add (key, pref,
                          transform_font_name,
                          &desktop_font_data[k]);
        }

#ifdef MIGRATE_PIXEL_SIZE
        if (migrate_size)
        {
            char *type;

            type = eel_gconf_get_string (CONF_RENDERING_FONT_TYPE_OLD);
            if (type && (strcmp (type, "serif") == 0 ||
                     strcmp (type, "sans-serif") == 0))
            {
                char *family;

                g_snprintf (old_key, sizeof (old_key), "%s_%s_%s",
                        CONF_RENDERING_FONT, type, code);
                g_snprintf (key, sizeof (key), "%s_%s_%s",
                        CONF_RENDERING_FONT, "variable", code);

                family = eel_gconf_get_string (old_key);
                if (family)
                {
                    eel_gconf_set_string (key, family);
                    g_free (family);
                }
            }

            g_free (type);
        }
#endif

        /* FIXME is it "minimum-size" or "min-size" !!? */
        g_snprintf (key, sizeof (key), "%s_%s",
                CONF_RENDERING_FONT_MIN_SIZE, code);
        g_snprintf (pref, sizeof (pref), "font.minimum-size.%s", code);

        minimum_font_size_data->prefs[i] = g_strdup (key);

        mozilla_notifier_add (key, pref, transform_minimum_font_size,
                      minimum_font_size_data);

#ifdef MIGRATE_PIXEL_SIZE
        if (migrate_size)
        {
            g_snprintf (old_key, sizeof (key), "%s_%s",
                    CONF_RENDERING_FONT_MIN_SIZE_OLD, code);
            migrate_font_gconf_key (old_key, key);
        }
#endif

        g_snprintf (key, sizeof (key), "%s_%s",
                CONF_RENDERING_FONT_FIXED_SIZE, code);
        g_snprintf (pref, sizeof (pref), "font.size.fixed.%s", code);

        desktop_font_data[1].font_size_prefs[i] = g_strdup (key);
        mozilla_notifier_add (key, pref, transform_font_size,
                      &desktop_font_data[1]);

#ifdef MIGRATE_PIXEL_SIZE
        if (migrate_size)
        {
            g_snprintf (old_key, sizeof (old_key), "%s_%s",
                    CONF_RENDERING_FONT_FIXED_SIZE_OLD, code);
            migrate_font_gconf_key (old_key, key);
        }
#endif

        g_snprintf (key, sizeof (key), "%s_%s",
                CONF_RENDERING_FONT_VAR_SIZE, code);
        g_snprintf (pref, sizeof (pref), "font.size.variable.%s", code);
    
        desktop_font_data[0].font_size_prefs[i] = g_strdup (key);
        mozilla_notifier_add (key, pref, transform_font_size,
                      &desktop_font_data[0]);

#ifdef MIGRATE_PIXEL_SIZE
        if (migrate_size)
        {
            g_snprintf (old_key, sizeof (old_key), "%s_%s",
                    CONF_RENDERING_FONT_VAR_SIZE_OLD, code);
            migrate_font_gconf_key (old_key, key);
        }
#endif
    }
}

static void
mozilla_font_notifiers_shutdown (void)
{
    eel_gconf_monitor_remove ("/desktop/gnome/interface");

    eel_gconf_notification_remove (desktop_font_data[0].cnxn_id);
    eel_gconf_notification_remove (desktop_font_data[1].cnxn_id);
    eel_gconf_notification_remove (minimum_font_size_data->cnxn_id);

    g_free (desktop_font_data[0].font_name);
    g_free (desktop_font_data[1].font_name);

    g_strfreev (desktop_font_data[0].font_name_prefs);
    g_strfreev (desktop_font_data[0].font_size_prefs);
    g_strfreev (desktop_font_data[1].font_name_prefs);
    g_strfreev (desktop_font_data[1].font_size_prefs);
    g_strfreev (minimum_font_size_data->prefs);

    g_free (desktop_font_data);
    g_free (minimum_font_size_data);    
}

extern "C" gboolean
mozilla_notifiers_init (void)
{
    guint i;

    eel_gconf_monitor_add ("/apps/epiphany/web");
    eel_gconf_monitor_add ("/system/proxy");
    eel_gconf_monitor_add ("/system/http_proxy");

    /* the pref service conveniently implements the root pref branch */
    gPrefBranch = nsnull;
    nsresult rv = CallGetService (NS_PREFSERVICE_CONTRACTID, &gPrefBranch);
    if (NS_FAILED (rv) || !gPrefBranch)
    {
        g_warning ("Failed to get the pref service!\n");
        return FALSE;
    }

    for (i = 0; i < G_N_ELEMENTS (notifier_entries); i++)
    {
        mozilla_notifier_add (notifier_entries[i].gconf_key,
                      notifier_entries[i].mozilla_pref,
                      notifier_entries[i].func,
                      notifier_entries[i].user_data);
    }

    mozilla_font_notifiers_init ();

    return TRUE;
}

static void
remove_notification (PrefData *data)
{
    eel_gconf_notification_remove (data->cnxn_id);
}

extern "C" void
mozilla_notifiers_shutdown (void)
{
    NS_IF_RELEASE (gPrefBranch);
    gPrefBranch = nsnull;

    mozilla_font_notifiers_shutdown ();

    eel_gconf_monitor_remove ("/apps/epiphany/web");
    eel_gconf_monitor_remove ("/system/proxy");
    eel_gconf_monitor_remove ("/system/http_proxy");

    g_list_foreach (notifiers, (GFunc) remove_notification, NULL);
    g_list_free (notifiers);
}