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/*
 * e-cal-shell-content.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-cal-shell-content.h"

#include <string.h>
#include <glib/gi18n.h>

#include "e-util/e-binding.h"
#include "e-util/gconf-bridge.h"
#include "widgets/menus/gal-view-etable.h"
#include "widgets/misc/e-paned.h"
#include "widgets/misc/e-selectable.h"

#include "calendar/gui/calendar-config.h"
#include "calendar/gui/calendar-view.h"
#include "calendar/gui/e-cal-list-view.h"
#include "calendar/gui/e-cal-model-calendar.h"
#include "calendar/gui/e-calendar-view.h"
#include "calendar/gui/e-day-view.h"
#include "calendar/gui/e-week-view.h"

#include "e-cal-shell-view-private.h"

#define E_CAL_SHELL_CONTENT_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_CAL_SHELL_CONTENT, ECalShellContentPrivate))

struct _ECalShellContentPrivate {
    GtkWidget *hpaned;
    GtkWidget *notebook;
    GtkWidget *vpaned;

    GtkWidget *calendar;
    GtkWidget *task_table;
    GtkWidget *memo_table;

    GalViewInstance *view_instance;

    guint paned_binding_id;
};

enum {
    PROP_0,
    PROP_CALENDAR,
    PROP_MEMO_TABLE,
    PROP_TASK_TABLE
};

/* Used to indicate who has the focus within the calendar view. */
typedef enum {
    FOCUS_CALENDAR,
    FOCUS_MEMO_TABLE,
    FOCUS_TASK_TABLE,
    FOCUS_OTHER
} FocusLocation;

static gpointer parent_class;
static GType cal_shell_content_type;

static void
cal_shell_content_display_view_cb (ECalShellContent *cal_shell_content,
                                   GalView *gal_view)
{
    GnomeCalendar *calendar;
    GnomeCalendarViewType view_type;

    /* XXX This is confusing: we have CalendarView and ECalendarView.
     *     ECalendarView is an abstract base class for calendar view
     *     widgets (day view, week view, etc).  CalendarView is a
     *     simple GalView subclass that represents a calendar view. */

    calendar = e_cal_shell_content_get_calendar (cal_shell_content);

    if (GAL_IS_VIEW_ETABLE (gal_view)) {
        ECalendarView *calendar_view;

        view_type = GNOME_CAL_LIST_VIEW;
        calendar_view = gnome_calendar_get_calendar_view (
            calendar, view_type);
        gal_view_etable_attach_table (
            GAL_VIEW_ETABLE (gal_view),
            E_CAL_LIST_VIEW (calendar_view)->table);
    } else {
        view_type = calendar_view_get_view_type (
            CALENDAR_VIEW (gal_view));
    }

    gnome_calendar_display_view (calendar, view_type);
}

static void
cal_shell_content_notify_view_id_cb (ECalShellContent *cal_shell_content)
{
    EShellContent *shell_content;
    EShellView *shell_view;
    GConfBridge *bridge;
    GtkWidget *paned;
    guint binding_id;
    const gchar *key;
    const gchar *view_id;

    bridge = gconf_bridge_get ();
    paned = cal_shell_content->priv->hpaned;
    binding_id = cal_shell_content->priv->paned_binding_id;

    shell_content = E_SHELL_CONTENT (cal_shell_content);
    shell_view = e_shell_content_get_shell_view (shell_content);
    view_id = e_shell_view_get_view_id (shell_view);

    if (binding_id > 0)
        gconf_bridge_unbind (bridge, binding_id);

    if (view_id != NULL && strcmp (view_id, "Month_View") == 0)
        key = "/apps/evolution/calendar/display/month_hpane_position";
    else
        key = "/apps/evolution/calendar/display/hpane_position";

    binding_id = gconf_bridge_bind_property_delayed (
        bridge, key, G_OBJECT (paned), "hposition");

    cal_shell_content->priv->paned_binding_id = binding_id;
}

static gchar *
cal_shell_content_get_pad_state_filename (EShellContent *shell_content,
                                          ETable *table)
{
    EShellBackend *shell_backend;
    EShellView *shell_view;
    const gchar *config_dir, *nick = NULL;

    g_return_val_if_fail (shell_content != NULL, NULL);
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);
    g_return_val_if_fail (table != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE (table), NULL);

    if (E_IS_TASK_TABLE (table))
        nick = "TaskPad";
    else if (E_IS_MEMO_TABLE (table))
        nick = "MemoPad";

    g_return_val_if_fail (nick != NULL, NULL);

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_backend = e_shell_view_get_shell_backend (shell_view);
    config_dir = e_shell_backend_get_config_dir (shell_backend);

    return g_build_filename (config_dir, nick, NULL);
}

static void
cal_shell_content_save_table_state (EShellContent *shell_content,
                                    ETable *table)
{
    gchar *filename;

    filename = cal_shell_content_get_pad_state_filename (
        shell_content, table);
    g_return_if_fail (filename != NULL);

    e_table_save_state (table, filename);
    g_free (filename);
}

static void
cal_shell_content_load_table_state (EShellContent *shell_content,
                                    ETable *table)
{
    gchar *filename;

    filename = cal_shell_content_get_pad_state_filename (
        shell_content, table);
    g_return_if_fail (filename != NULL);

    e_table_load_state (table, filename);
    g_free (filename);
}

void
e_cal_shell_content_save_state (ECalShellContent *cal_shell_content)
{
    ECalShellContentPrivate *priv;

    g_return_if_fail (cal_shell_content != NULL);
    g_return_if_fail (E_IS_CAL_SHELL_CONTENT (cal_shell_content));

    priv = E_CAL_SHELL_CONTENT_GET_PRIVATE (cal_shell_content);

    if (priv->task_table != NULL)
        cal_shell_content_save_table_state (
            E_SHELL_CONTENT (cal_shell_content),
            E_TABLE (priv->task_table));

    if (priv->memo_table != NULL)
        cal_shell_content_save_table_state (
            E_SHELL_CONTENT (cal_shell_content),
            E_TABLE (priv->memo_table));
}

static void
cal_shell_content_set_property (GObject *object,
                                guint property_id,
                                const GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cal_shell_content_get_property (GObject *object,
                                guint property_id,
                                GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CALENDAR:
            g_value_set_object (
                value, e_cal_shell_content_get_calendar (
                E_CAL_SHELL_CONTENT (object)));
            return;

        case PROP_MEMO_TABLE:
            g_value_set_object (
                value, e_cal_shell_content_get_memo_table (
                E_CAL_SHELL_CONTENT (object)));
            return;

        case PROP_TASK_TABLE:
            g_value_set_object (
                value, e_cal_shell_content_get_task_table (
                E_CAL_SHELL_CONTENT (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cal_shell_content_dispose (GObject *object)
{
    ECalShellContentPrivate *priv;

    priv = E_CAL_SHELL_CONTENT_GET_PRIVATE (object);

    if (priv->hpaned != NULL) {
        g_object_unref (priv->hpaned);
        priv->hpaned = NULL;
    }

    if (priv->notebook != NULL) {
        g_object_unref (priv->notebook);
        priv->notebook = NULL;
    }

    if (priv->vpaned != NULL) {
        g_object_unref (priv->vpaned);
        priv->vpaned = NULL;
    }

    if (priv->calendar != NULL) {
        gnome_calendar_dispose (GNOME_CALENDAR (priv->calendar));
        g_object_unref (priv->calendar);
        priv->calendar = NULL;
    }

    if (priv->task_table != NULL) {
        g_object_unref (priv->task_table);
        priv->task_table = NULL;
    }

    if (priv->memo_table != NULL) {
        g_object_unref (priv->memo_table);
        priv->memo_table = NULL;
    }

    if (priv->view_instance != NULL) {
        g_object_unref (priv->view_instance);
        priv->view_instance = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (parent_class)->dispose (object);
}

static time_t
gc_get_default_time (ECalModel *model, gpointer user_data)
{
    GnomeCalendar *gcal = user_data;
    time_t res = 0, end;

    g_return_val_if_fail (model != NULL, 0);
    g_return_val_if_fail (GNOME_IS_CALENDAR (user_data), 0);

    gnome_calendar_get_current_time_range (gcal, &res, &end);

    return res;
}

static void
cal_shell_content_constructed (GObject *object)
{
    ECalShellContentPrivate *priv;
    ECalendarView *calendar_view;
    ECalModel *memo_model=NULL;
    ECalModel *task_model=NULL;
    EShell *shell;
    EShellContent *shell_content;
    EShellView *shell_view;
    EShellWindow *shell_window;
    EShellContent *foreign_content;
    EShellView *foreign_view;
    GnomeCalendar *calendar;
    GalViewInstance *view_instance;
    GConfBridge *bridge;
    GtkWidget *container;
    GtkWidget *widget;
    const gchar *key;
    gchar *markup;
    gint ii;

    priv = E_CAL_SHELL_CONTENT_GET_PRIVATE (object);

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (parent_class)->constructed (object);

    shell_content = E_SHELL_CONTENT (object);
    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);

    shell = e_shell_window_get_shell (shell_window);

    /* We borrow the memopad and taskpad models from the memo
     * and task views, loading the views if necessary. */
    if (!e_shell_get_express_mode (shell)) {
        foreign_view = e_shell_window_get_shell_view (shell_window, "memos");
        foreign_content = e_shell_view_get_shell_content (foreign_view);
        g_object_get (foreign_content, "model", &memo_model, NULL);

        foreign_view = e_shell_window_get_shell_view (shell_window, "tasks");
        foreign_content = e_shell_view_get_shell_content (foreign_view);
        g_object_get (foreign_content, "model", &task_model, NULL);
    }

    /* Build content widgets. */

    container = GTK_WIDGET (object);

    if (!e_shell_get_express_mode (shell)) {
        widget = e_paned_new (GTK_ORIENTATION_HORIZONTAL);
        gtk_container_add (GTK_CONTAINER (container), widget);
        priv->hpaned = g_object_ref (widget);
        gtk_widget_show (widget);

        container = priv->hpaned;
    }

    widget = gtk_notebook_new ();
    gtk_notebook_set_show_tabs (GTK_NOTEBOOK (widget), FALSE);
    gtk_notebook_set_show_border (GTK_NOTEBOOK (widget), FALSE);
    if (!e_shell_get_express_mode (shell))
        gtk_paned_pack1 (GTK_PANED (container), widget, TRUE, FALSE);
    else
        gtk_container_add (GTK_CONTAINER (container), widget);
    priv->notebook = g_object_ref (widget);
    gtk_widget_show (widget);

    if (!e_shell_get_express_mode (shell)) {
        /* FIXME Need to deal with saving and restoring the position.
         *       Month view has its own position. */
        widget = e_paned_new (GTK_ORIENTATION_VERTICAL);
        e_paned_set_fixed_resize (E_PANED (widget), FALSE);
        gtk_paned_pack2 (GTK_PANED (container), widget, FALSE, TRUE);
        priv->vpaned = g_object_ref (widget);
        gtk_widget_show (widget);
    }

    container = priv->notebook;

    /* Add views in the order defined by GnomeCalendarViewType, such
     * that the notebook page number corresponds to the view type. */

    priv->calendar = gnome_calendar_new ();
    calendar = GNOME_CALENDAR (priv->calendar);

    for (ii = 0; ii < GNOME_CAL_LAST_VIEW; ii++) {
        calendar_view = gnome_calendar_get_calendar_view (calendar, ii);

        gtk_notebook_append_page (
            GTK_NOTEBOOK (container),
            GTK_WIDGET (calendar_view), NULL);
        gtk_widget_show (GTK_WIDGET (calendar_view));
    }

    e_binding_new (
        priv->calendar, "view",
        priv->notebook, "page");

    container = priv->vpaned;

    if (!e_shell_get_express_mode (shell)) {
        widget = gtk_vbox_new (FALSE, 0);
        gtk_paned_pack1 (GTK_PANED (container), widget, TRUE, TRUE);
        gtk_widget_show (widget);

        container = widget;

        widget = gtk_hseparator_new ();
        gtk_box_pack_start (GTK_BOX (container), widget, FALSE, TRUE, 0);
        gtk_widget_show (widget);

        widget = gtk_label_new (NULL);
        markup = g_strdup_printf ("<b>%s</b>", _("Tasks"));
        gtk_label_set_markup (GTK_LABEL (widget), markup);
        gtk_box_pack_start (GTK_BOX (container), widget, FALSE, TRUE, 0);
        gtk_widget_show (widget);
        g_free (markup);

        widget = gtk_scrolled_window_new (NULL, NULL);
        gtk_scrolled_window_set_policy (
            GTK_SCROLLED_WINDOW (widget),
            GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
        gtk_scrolled_window_set_shadow_type (
            GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN);
        gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
        gtk_widget_show (widget);

        container = widget;

        widget = e_task_table_new (shell_view, task_model);
        gtk_container_add (GTK_CONTAINER (container), widget);
        priv->task_table = g_object_ref (widget);
        gtk_widget_show (widget);

        cal_shell_content_load_table_state (
            shell_content, E_TABLE (widget));

        g_signal_connect_swapped (
            widget, "open-component",
            G_CALLBACK (e_cal_shell_view_taskpad_open_task),
            shell_view);

        container = priv->vpaned;

        widget = gtk_vbox_new (FALSE, 0);
        gtk_paned_pack2 (GTK_PANED (container), widget, TRUE, TRUE);
        gtk_widget_show (widget);

        container = widget;

        widget = gtk_label_new (NULL);
        markup = g_strdup_printf ("<b>%s</b>", _("Memos"));
        gtk_label_set_markup (GTK_LABEL (widget), markup);
        gtk_box_pack_start (GTK_BOX (container), widget, FALSE, TRUE, 0);
        gtk_widget_show (widget);
        g_free (markup);

        widget = gtk_scrolled_window_new (NULL, NULL);
        gtk_scrolled_window_set_policy (
            GTK_SCROLLED_WINDOW (widget),
            GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
        gtk_scrolled_window_set_shadow_type (
            GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN);
        gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
        gtk_widget_show (widget);

        container = widget;

        widget = e_memo_table_new (shell_view, memo_model);
        gtk_container_add (GTK_CONTAINER (container), widget);
        priv->memo_table = g_object_ref (widget);
        gtk_widget_show (widget);

        cal_shell_content_load_table_state (
            shell_content, E_TABLE (widget));

        e_cal_model_set_default_time_func (
            memo_model, gc_get_default_time, calendar);

        g_signal_connect_swapped (
            widget, "open-component",
            G_CALLBACK (e_cal_shell_view_memopad_open_memo),
            shell_view);
    }

    /* Load the view instance. */

    view_instance = e_shell_view_new_view_instance (shell_view, NULL);
    g_signal_connect_swapped (
        view_instance, "display-view",
        G_CALLBACK (cal_shell_content_display_view_cb),
        object);
    /* XXX Actually, don't load the view instance just yet.
     *     The GtkWidget::map() callback below explains why. */
    priv->view_instance = view_instance;

    if (!e_shell_get_express_mode (shell)) {
        g_signal_connect_swapped (
            shell_view, "notify::view-id",
            G_CALLBACK (cal_shell_content_notify_view_id_cb),
            object);

        bridge = gconf_bridge_get ();

        object = G_OBJECT (priv->vpaned);
        key = "/apps/evolution/calendar/display/tag_vpane_position";
        gconf_bridge_bind_property_delayed (bridge, key, object, "proportion");
    }

    if (memo_model)
        g_object_unref (memo_model);
    if (task_model)
        g_object_unref (task_model);
}

static void
cal_shell_content_map (GtkWidget *widget)
{
    ECalShellContentPrivate *priv;

    /* XXX Delay loading the GalViewInstance until after ECalShellView
     *     has a chance to install the sidebar's date navigator into
     *     GnomeCalendar, since loading the GalViewInstance triggers a
     *     callback in GnomeCalendar that requires the date navigator.
     *     Ordinarily we would do this at the end of constructed(), but
     *     that's too soon in this case.  (This feels kind of kludgy.) */
    priv = E_CAL_SHELL_CONTENT_GET_PRIVATE (widget);
    gal_view_instance_load (priv->view_instance);

    /* Chain up to parent's map() method. */
    GTK_WIDGET_CLASS (parent_class)->map (widget);
}

static void
cal_shell_content_focus_search_results (EShellContent *shell_content)
{
    ECalShellContent *cal_shell_content;
    GnomeCalendar *calendar;
    GnomeCalendarViewType view_type;
    ECalendarView *calendar_view;

    cal_shell_content = E_CAL_SHELL_CONTENT (shell_content);
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);
    view_type = gnome_calendar_get_view (calendar);
    calendar_view = gnome_calendar_get_calendar_view (calendar, view_type);

    gtk_widget_grab_focus (GTK_WIDGET (calendar_view));
}

static void
cal_shell_content_class_init (ECalShellContentClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;
    EShellContentClass *shell_content_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (ECalShellContentPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = cal_shell_content_set_property;
    object_class->get_property = cal_shell_content_get_property;
    object_class->dispose = cal_shell_content_dispose;
    object_class->constructed = cal_shell_content_constructed;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->map = cal_shell_content_map;

    shell_content_class = E_SHELL_CONTENT_CLASS (class);
    shell_content_class->focus_search_results = cal_shell_content_focus_search_results;

    g_object_class_install_property (
        object_class,
        PROP_CALENDAR,
        g_param_spec_object (
            "calendar",
            NULL,
            NULL,
            GNOME_TYPE_CALENDAR,
            G_PARAM_READABLE));

    g_object_class_install_property (
        object_class,
        PROP_MEMO_TABLE,
        g_param_spec_object (
            "memo-table",
            NULL,
            NULL,
            E_TYPE_MEMO_TABLE,
            G_PARAM_READABLE));

    g_object_class_install_property (
        object_class,
        PROP_TASK_TABLE,
        g_param_spec_object (
            "task-table",
            NULL,
            NULL,
            E_TYPE_TASK_TABLE,
            G_PARAM_READABLE));
}

static void
cal_shell_content_init (ECalShellContent *cal_shell_content)
{
    cal_shell_content->priv =
        E_CAL_SHELL_CONTENT_GET_PRIVATE (cal_shell_content);

    /* Postpone widget construction until we have a shell view. */
}

GType
e_cal_shell_content_get_type (void)
{
    return cal_shell_content_type;
}

void
e_cal_shell_content_register_type (GTypeModule *type_module)
{
    static const GTypeInfo type_info = {
        sizeof (ECalShellContentClass),
        (GBaseInitFunc) NULL,
        (GBaseFinalizeFunc) NULL,
        (GClassInitFunc) cal_shell_content_class_init,
        (GClassFinalizeFunc) NULL,
        NULL,  /* class_data */
        sizeof (ECalShellContent),
        0,     /* n_preallocs */
        (GInstanceInitFunc) cal_shell_content_init,
        NULL   /* value_table */
    };

    cal_shell_content_type = g_type_module_register_type (
        type_module, E_TYPE_SHELL_CONTENT,
        "ECalShellContent", &type_info, 0);
}

GtkWidget *
e_cal_shell_content_new (EShellView *shell_view)
{
    g_return_val_if_fail (E_IS_SHELL_VIEW (shell_view), NULL);

    return g_object_new (
        E_TYPE_CAL_SHELL_CONTENT,
        "shell-view", shell_view, NULL);
}

ECalModel *
e_cal_shell_content_get_model (ECalShellContent *cal_shell_content)
{
    GnomeCalendar *calendar;

    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    calendar = e_cal_shell_content_get_calendar (cal_shell_content);

    return gnome_calendar_get_model (calendar);
}

GnomeCalendar *
e_cal_shell_content_get_calendar (ECalShellContent *cal_shell_content)
{
    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    return GNOME_CALENDAR (cal_shell_content->priv->calendar);
}

EMemoTable *
e_cal_shell_content_get_memo_table (ECalShellContent *cal_shell_content)
{
    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    return E_MEMO_TABLE (cal_shell_content->priv->memo_table);
}

ETaskTable *
e_cal_shell_content_get_task_table (ECalShellContent *cal_shell_content)
{
    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    return E_TASK_TABLE (cal_shell_content->priv->task_table);
}

EShellSearchbar *
e_cal_shell_content_get_searchbar (ECalShellContent *cal_shell_content)
{
    EShellView *shell_view;
    EShellContent *shell_content;
    GtkWidget *widget;

    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    shell_content = E_SHELL_CONTENT (cal_shell_content);
    shell_view = e_shell_content_get_shell_view (shell_content);
    widget = e_shell_view_get_searchbar (shell_view);

    return E_SHELL_SEARCHBAR (widget);
}

GalViewInstance *
e_cal_shell_content_get_view_instance (ECalShellContent *cal_shell_content)
{
    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    return cal_shell_content->priv->view_instance;
}