path: root/modules/cal-config-weather/evolution-cal-config-weather.c

/*
 * evolution-cal-config-weather.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 */

#include <config.h>
#include <glib/gi18n-lib.h>

#include <libebackend/e-extension.h>

#define GWEATHER_I_KNOW_THIS_IS_UNSTABLE
#include <libgweather/location-entry.h>
#undef GWEATHER_I_KNOW_THIS_IS_UNSTABLE

#include <misc/e-source-config-backend.h>
#include <calendar/gui/e-cal-source-config.h>

#include "e-source-weather.h"

typedef ESourceConfigBackend ECalConfigWeather;
typedef ESourceConfigBackendClass ECalConfigWeatherClass;

/* Module Entry Points */
void e_module_load (GTypeModule *type_module);
void e_module_unload (GTypeModule *type_module);

typedef struct _Context Context;

struct _Context {
    GtkWidget *location_entry;
    GtkWidget *units_combo;
};

/* Forward Declarations */
GType e_cal_config_weather_get_type (void);

G_DEFINE_DYNAMIC_TYPE (
    ECalConfigWeather,
    e_cal_config_weather,
    E_TYPE_SOURCE_CONFIG_BACKEND)

static void
cal_config_weather_context_free (Context *context)
{
    g_object_unref (context->location_entry);
    g_object_unref (context->units_combo);

    g_slice_free (Context, context);
}

static gboolean
cal_config_weather_location_to_string (GBinding *binding,
                                       const GValue *source_value,
                                       GValue *target_value,
                                       gpointer user_data)
{
    GWeatherLocation *location;
    gchar *string = NULL;

    location = g_value_get_pointer (source_value);

    if (location != NULL) {
        const gchar *code;
        gchar *city_name;

        code = gweather_location_get_code (location);
        city_name = gweather_location_get_city_name (location);
        string = g_strdup_printf ("%s/%s", code, city_name);
        g_free (city_name);
    }

    g_value_take_string (target_value, string);

    return TRUE;
}

/* XXX This is a private libgweather constant.
 *     The value may change at any time. */
#define GWEATHER_LOCATION_ENTRY_COL_LOCATION 1

static gboolean
cal_config_weather_string_to_location (GBinding *binding,
                                       const GValue *source_value,
                                       GValue *target_value,
                                       gpointer user_data)
{
    GObject *target;
    GWeatherLocation *match = NULL;
    GtkEntryCompletion *completion;
    GtkTreeModel *model;
    GtkTreeIter iter;
    const gchar *string;
    const gchar *city_name;
    const gchar *code;
    gchar **tokens;

    /* XXX This is a bit convoluted because libgweather lacks a
     *     GWeatherLocation lookup function.  The algorithm is
     *     copied from gweather_location_entry_set_city(). */

    string = g_value_get_string (source_value);

    if (string == NULL)
        return FALSE;

    /* String is: STATION-CODE '/' CITY-NAME */
    tokens = g_strsplit (string, "/", 2);

    if (g_strv_length (tokens) != 2) {
        g_strfreev (tokens);
        return FALSE;
    }

    code = tokens[0];
    city_name = tokens[1];

    target = g_binding_get_target (binding);
    completion = gtk_entry_get_completion (GTK_ENTRY (target));
    model = gtk_entry_completion_get_model (completion);

    gtk_tree_model_get_iter_first (model, &iter);

    do {
        GWeatherLocation *location;
        const gchar *cmp_code;
        gchar *cmp_city_name;

        gtk_tree_model_get (
            model, &iter,
            GWEATHER_LOCATION_ENTRY_COL_LOCATION,
            &location, -1);

        /* Does the station code match? */
        cmp_code = gweather_location_get_code (location);
        if (g_strcmp0 (code, cmp_code) != 0)
            continue;

        /* Does the city name match? */
        cmp_city_name = gweather_location_get_city_name (location);
        if (g_strcmp0 (city_name, cmp_city_name) != 0) {
            g_free (cmp_city_name);
            continue;
        }
        g_free (cmp_city_name);

        /* We found a match! */
        match = location;
        break;

    } while (gtk_tree_model_iter_next (model, &iter));

    g_value_set_pointer (target_value, match);

    g_strfreev (tokens);

    return TRUE;
}

static gboolean
cal_config_weather_allow_creation (ESourceConfigBackend *backend)
{
    ESourceConfig *config;
    ECalSourceConfig *cal_config;
    ECalClientSourceType source_type;

    /* No such thing as weather task lists or weather memo lists. */

    config = e_source_config_backend_get_config (backend);

    cal_config = E_CAL_SOURCE_CONFIG (config);
    source_type = e_cal_source_config_get_source_type (cal_config);

    return (source_type == E_CAL_CLIENT_SOURCE_TYPE_EVENTS);
}

static void
cal_config_weather_insert_widgets (ESourceConfigBackend *backend,
                                   ESource *scratch_source)
{
    ESourceConfig *config;
    ESourceExtension *extension;
    GWeatherLocation *world;
    GtkWidget *widget;
    Context *context;
    const gchar *extension_name;
    const gchar *uid;

    context = g_slice_new (Context);
    uid = e_source_get_uid (scratch_source);
    config = e_source_config_backend_get_config (backend);

    g_object_set_data_full (
        G_OBJECT (backend), uid, context,
        (GDestroyNotify) cal_config_weather_context_free);

    world = gweather_location_new_world (TRUE);

    e_cal_source_config_add_offline_toggle (
        E_CAL_SOURCE_CONFIG (config), scratch_source);

    widget = gweather_location_entry_new (world);
    e_source_config_insert_widget (
        config, scratch_source, _("Location:"), widget);
    context->location_entry = g_object_ref (widget);
    gtk_widget_show (widget);

    /* This must follow the order of ESourceWeatherUnits. */
    widget = gtk_combo_box_text_new ();
    gtk_combo_box_text_append_text (
        GTK_COMBO_BOX_TEXT (widget),
        _("Metric (Celsius, cm, etc)"));
    gtk_combo_box_text_append_text (
        GTK_COMBO_BOX_TEXT (widget),
        _("Imperial (Fahrenheit, inches, etc)"));
    e_source_config_insert_widget (
        config, scratch_source, _("Units:"), widget);
    context->units_combo = g_object_ref (widget);
    gtk_widget_show (widget);

    e_source_config_add_refresh_interval (config, scratch_source);

    gweather_location_unref (world);

    extension_name = E_SOURCE_EXTENSION_WEATHER_BACKEND;
    extension = e_source_get_extension (scratch_source, extension_name);

    g_object_bind_property_full (
        extension, "location",
        context->location_entry, "location",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE,
        cal_config_weather_string_to_location,
        cal_config_weather_location_to_string,
        NULL, (GDestroyNotify) NULL);

    g_object_bind_property (
        extension, "units",
        context->units_combo, "active",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);
}

static gboolean
cal_config_weather_check_complete (ESourceConfigBackend *backend,
                                   ESource *scratch_source)
{
    ESourceWeather *extension;
    const gchar *extension_name;
    const gchar *location;

    extension_name = E_SOURCE_EXTENSION_WEATHER_BACKEND;
    extension = e_source_get_extension (scratch_source, extension_name);

    location = e_source_weather_get_location (extension);

    g_debug ("Location: [%s]", location);

    return (location != NULL) && (*location != '\0');
}

static void
e_cal_config_weather_class_init (ESourceConfigBackendClass *class)
{
    EExtensionClass *extension_class;

    extension_class = E_EXTENSION_CLASS (class);
    extension_class->extensible_type = E_TYPE_CAL_SOURCE_CONFIG;

    class->parent_uid = "weather-stub";
    class->backend_name = "weather";
    class->allow_creation = cal_config_weather_allow_creation;
    class->insert_widgets = cal_config_weather_insert_widgets;
    class->check_complete = cal_config_weather_check_complete;
}

static void
e_cal_config_weather_class_finalize (ESourceConfigBackendClass *class)
{
}

static void
e_cal_config_weather_init (ESourceConfigBackend *backend)
{
}

G_MODULE_EXPORT void
e_module_load (GTypeModule *type_module)
{
    e_source_weather_type_register (type_module);
    e_cal_config_weather_register_type (type_module);
}

G_MODULE_EXPORT void
e_module_unload (GTypeModule *type_module)
{
}