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/*
 * e-task-shell-view.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.
 *
 * 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 Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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

enum {
    PROP_0,
    PROP_CONFIRM_PURGE
};

G_DEFINE_DYNAMIC_TYPE (
    ETaskShellView,
    e_task_shell_view,
    E_TYPE_SHELL_VIEW)

static void
task_shell_view_set_property (GObject *object,
                              guint property_id,
                              const GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CONFIRM_PURGE:
            e_task_shell_view_set_confirm_purge (
                E_TASK_SHELL_VIEW (object),
                g_value_get_boolean (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
task_shell_view_get_property (GObject *object,
                              guint property_id,
                              GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CONFIRM_PURGE:
            g_value_set_boolean (
                value, e_task_shell_view_get_confirm_purge (
                E_TASK_SHELL_VIEW (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
task_shell_view_dispose (GObject *object)
{
    e_task_shell_view_private_dispose (E_TASK_SHELL_VIEW (object));

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

static void
task_shell_view_finalize (GObject *object)
{
    e_task_shell_view_private_finalize (E_TASK_SHELL_VIEW (object));

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

static void
task_shell_view_constructed (GObject *object)
{
    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (e_task_shell_view_parent_class)->constructed (object);

    e_task_shell_view_private_constructed (E_TASK_SHELL_VIEW (object));
}

static void
task_shell_view_execute_search (EShellView *shell_view)
{
    ETaskShellContent *task_shell_content;
    EShellWindow *shell_window;
    EShellContent *shell_content;
    EShellSearchbar *searchbar;
    EActionComboBox *combo_box;
    GtkRadioAction *action;
    ECalComponentPreview *task_preview;
    EPreviewPane *preview_pane;
    ETaskTable *task_table;
    EWebView *web_view;
    ECalModel *model;
    icaltimezone *timezone;
    struct icaltimetype current_time;
    time_t start_range;
    time_t end_range;
    time_t now_time;
    gchar *start, *end;
    gchar *query;
    gchar *temp;
    gint value;

    shell_window = e_shell_view_get_shell_window (shell_view);
    shell_content = e_shell_view_get_shell_content (shell_view);

    task_shell_content = E_TASK_SHELL_CONTENT (shell_content);
    searchbar = e_task_shell_content_get_searchbar (task_shell_content);

    task_shell_content = E_TASK_SHELL_CONTENT (shell_content);
    task_table = e_task_shell_content_get_task_table (task_shell_content);
    model = e_task_table_get_model (task_table);
    timezone = e_cal_model_get_timezone (model);
    current_time = icaltime_current_time_with_zone (timezone);
    now_time = time_day_begin (icaltime_as_timet (current_time));

    action = GTK_RADIO_ACTION (ACTION (TASK_SEARCH_ANY_FIELD_CONTAINS));
    value = gtk_radio_action_get_current_value (action);

    if (value == TASK_SEARCH_ADVANCED) {
        query = e_shell_view_get_search_query (shell_view);

        if (!query)
            query = g_strdup ("");
    } else {
        const gchar *format;
        const gchar *text;
        GString *string;

        text = e_shell_searchbar_get_search_text (searchbar);

        if (text == NULL || *text == '\0') {
            text = "";
            value = TASK_SEARCH_SUMMARY_CONTAINS;
        }

        switch (value) {
            default:
                text = "";
                /* fall through */

            case TASK_SEARCH_SUMMARY_CONTAINS:
                format = "(contains? \"summary\" %s)";
                break;

            case TASK_SEARCH_DESCRIPTION_CONTAINS:
                format = "(contains? \"description\" %s)";
                break;

            case TASK_SEARCH_ANY_FIELD_CONTAINS:
                format = "(contains? \"any\" %s)";
                break;
        }

        /* Build the query. */
        string = g_string_new ("");
        e_sexp_encode_string (string, text);
        query = g_strdup_printf (format, string->str);
        g_string_free (string, TRUE);
    }

    /* Apply selected filter. */
    combo_box = e_shell_searchbar_get_filter_combo_box (searchbar);
    value = e_action_combo_box_get_current_value (combo_box);
    switch (value) {
        case TASK_FILTER_ANY_CATEGORY:
            break;

        case TASK_FILTER_UNMATCHED:
            temp = g_strdup_printf (
                "(and (has-categories? #f) %s)", query);
            g_free (query);
            query = temp;
            break;

        case TASK_FILTER_NEXT_7_DAYS_TASKS:
            start_range = now_time;
            end_range = time_day_end (time_add_day (start_range, 7));
            start = isodate_from_time_t (start_range);
            end = isodate_from_time_t (end_range);

            temp = g_strdup_printf (
                "(and %s (due-in-time-range? "
                "(make-time \"%s\") (make-time \"%s\")))",
                query, start, end);
            g_free (query);
            query = temp;
            break;

        case TASK_FILTER_ACTIVE_TASKS:
            start_range = now_time;
            end_range = time_day_end (time_add_day (start_range, 365));
            start = isodate_from_time_t (start_range);
            end = isodate_from_time_t (end_range);

            temp = g_strdup_printf (
                "(and %s (due-in-time-range? "
                "(make-time \"%s\") (make-time \"%s\")) "
                "(not (is-completed?)))",
                query, start, end);
            g_free (query);
            query = temp;
            break;

        case TASK_FILTER_OVERDUE_TASKS:
            start_range = 0;
            end_range = time_day_end (now_time);
            start = isodate_from_time_t (start_range);
            end = isodate_from_time_t (end_range);

            temp = g_strdup_printf (
                "(and %s (due-in-time-range? "
                "(make-time \"%s\") (make-time \"%s\")) "
                "(not (is-completed?)))",
                query, start, end);
            g_free (query);
            query = temp;
            break;

        case TASK_FILTER_COMPLETED_TASKS:
            temp = g_strdup_printf (
                "(and (is-completed?) %s)", query);
            g_free (query);
            query = temp;
            break;

        case TASK_FILTER_TASKS_WITH_ATTACHMENTS:
            temp = g_strdup_printf (
                "(and (has-attachments?) %s)", query);
            g_free (query);
            query = temp;
            break;

        default:
        {
            GList *categories;
            const gchar *category_name;

            categories = e_util_get_searchable_categories ();
            category_name = g_list_nth_data (categories, value);
            g_list_free (categories);

            temp = g_strdup_printf (
                "(and (has-categories? \"%s\") %s)",
                category_name, query);
            g_free (query);
            query = temp;
            break;
        }
    }

    /* Honor the user's preference to hide completed tasks. */
    temp = calendar_config_get_hide_completed_tasks_sexp (FALSE);
    if (temp != NULL) {
        gchar *temp2;

        temp2 = g_strdup_printf ("(and %s %s)", temp, query);
        g_free (query);
        g_free (temp);
        query = temp2;
    }

    /* Submit the query. */
    e_cal_model_set_search_query (model, query);
    g_free (query);

    preview_pane =
        e_task_shell_content_get_preview_pane (task_shell_content);

    web_view = e_preview_pane_get_web_view (preview_pane);
    task_preview = E_CAL_COMPONENT_PREVIEW (web_view);
    e_cal_component_preview_clear (task_preview);
}

static void
task_shell_view_update_actions (EShellView *shell_view)
{
    EShellContent *shell_content;
    EShellSidebar *shell_sidebar;
    EShellWindow *shell_window;
    GtkAction *action;
    const gchar *label;
    gboolean sensitive;
    guint32 state;

    /* Be descriptive. */
    gboolean any_tasks_selected;
    gboolean has_primary_source;
    gboolean multiple_tasks_selected;
    gboolean primary_source_is_writable;
    gboolean primary_source_is_removable;
    gboolean primary_source_is_remote_deletable;
    gboolean primary_source_in_collection;
    gboolean selection_has_url;
    gboolean selection_is_assignable;
    gboolean single_task_selected;
    gboolean some_tasks_complete;
    gboolean some_tasks_incomplete;
    gboolean sources_are_editable;
    gboolean refresh_supported;

    /* Chain up to parent's update_actions() method. */
    E_SHELL_VIEW_CLASS (e_task_shell_view_parent_class)->
        update_actions (shell_view);

    shell_window = e_shell_view_get_shell_window (shell_view);

    shell_content = e_shell_view_get_shell_content (shell_view);
    state = e_shell_content_check_state (shell_content);

    single_task_selected =
        (state & E_TASK_SHELL_CONTENT_SELECTION_SINGLE);
    multiple_tasks_selected =
        (state & E_TASK_SHELL_CONTENT_SELECTION_MULTIPLE);
    selection_is_assignable =
        (state & E_TASK_SHELL_CONTENT_SELECTION_CAN_ASSIGN);
    sources_are_editable =
        (state & E_TASK_SHELL_CONTENT_SELECTION_CAN_EDIT);
    some_tasks_complete =
        (state & E_TASK_SHELL_CONTENT_SELECTION_HAS_COMPLETE);
    some_tasks_incomplete =
        (state & E_TASK_SHELL_CONTENT_SELECTION_HAS_INCOMPLETE);
    selection_has_url =
        (state & E_TASK_SHELL_CONTENT_SELECTION_HAS_URL);

    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);
    state = e_shell_sidebar_check_state (shell_sidebar);

    has_primary_source =
        (state & E_TASK_SHELL_SIDEBAR_HAS_PRIMARY_SOURCE);
    primary_source_is_writable =
        (state & E_TASK_SHELL_SIDEBAR_PRIMARY_SOURCE_IS_WRITABLE);
    primary_source_is_removable =
        (state & E_TASK_SHELL_SIDEBAR_PRIMARY_SOURCE_IS_REMOVABLE);
    primary_source_is_remote_deletable =
        (state & E_TASK_SHELL_SIDEBAR_PRIMARY_SOURCE_IS_REMOTE_DELETABLE);
    primary_source_in_collection =
        (state & E_TASK_SHELL_SIDEBAR_PRIMARY_SOURCE_IN_COLLECTION);
    refresh_supported =
        (state & E_TASK_SHELL_SIDEBAR_SOURCE_SUPPORTS_REFRESH);

    any_tasks_selected =
        (single_task_selected || multiple_tasks_selected);

    action = ACTION (TASK_ASSIGN);
    sensitive =
        single_task_selected && sources_are_editable &&
        selection_is_assignable;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_DELETE);
    sensitive = any_tasks_selected && sources_are_editable;
    gtk_action_set_sensitive (action, sensitive);
    if (multiple_tasks_selected)
        label = _("Delete Tasks");
    else
        label = _("Delete Task");
    gtk_action_set_label (action, label);

    action = ACTION (TASK_FIND);
    sensitive = single_task_selected;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_FORWARD);
    sensitive = single_task_selected;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_LIST_COPY);
    sensitive = has_primary_source;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_LIST_DELETE);
    sensitive =
        primary_source_is_removable ||
        primary_source_is_remote_deletable;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_LIST_PROPERTIES);
    sensitive = primary_source_is_writable;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_LIST_REFRESH);
    sensitive = refresh_supported;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_LIST_RENAME);
    sensitive =
        primary_source_is_writable &&
        !primary_source_in_collection;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_MARK_COMPLETE);
    sensitive =
        any_tasks_selected &&
        sources_are_editable &&
        some_tasks_incomplete;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_MARK_INCOMPLETE);
    sensitive =
        any_tasks_selected &&
        sources_are_editable &&
        some_tasks_complete;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_OPEN);
    sensitive = single_task_selected;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_OPEN_URL);
    sensitive = single_task_selected && selection_has_url;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_PRINT);
    sensitive = single_task_selected;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_PURGE);
    sensitive = sources_are_editable;
    gtk_action_set_sensitive (action, sensitive);

    action = ACTION (TASK_SAVE_AS);
    sensitive = single_task_selected;
    gtk_action_set_sensitive (action, sensitive);
}

static void
e_task_shell_view_class_init (ETaskShellViewClass *class)
{
    GObjectClass *object_class;
    EShellViewClass *shell_view_class;

    g_type_class_add_private (class, sizeof (ETaskShellViewPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = task_shell_view_set_property;
    object_class->get_property = task_shell_view_get_property;
    object_class->dispose = task_shell_view_dispose;
    object_class->finalize = task_shell_view_finalize;
    object_class->constructed = task_shell_view_constructed;

    shell_view_class = E_SHELL_VIEW_CLASS (class);
    shell_view_class->label = _("Tasks");
    shell_view_class->icon_name = "evolution-tasks";
    shell_view_class->ui_definition = "evolution-tasks.ui";
    shell_view_class->ui_manager_id = "org.gnome.evolution.tasks";
    shell_view_class->search_options = "/task-search-options";
    shell_view_class->search_rules = "tasktypes.xml";
    shell_view_class->new_shell_content = e_task_shell_content_new;
    shell_view_class->new_shell_sidebar = e_task_shell_sidebar_new;
    shell_view_class->execute_search = task_shell_view_execute_search;
    shell_view_class->update_actions = task_shell_view_update_actions;

    g_object_class_install_property (
        object_class,
        PROP_CONFIRM_PURGE,
        g_param_spec_boolean (
            "confirm-purge",
            "Confirm Purge",
            NULL,
            TRUE,
            G_PARAM_READWRITE));

    /* Ensure the GalView types we need are registered. */
    g_type_ensure (GAL_TYPE_VIEW_ETABLE);
}

static void
e_task_shell_view_class_finalize (ETaskShellViewClass *class)
{
}

static void
e_task_shell_view_init (ETaskShellView *task_shell_view)
{
    task_shell_view->priv =
        E_TASK_SHELL_VIEW_GET_PRIVATE (task_shell_view);

    e_task_shell_view_private_init (task_shell_view);
}

void
e_task_shell_view_type_register (GTypeModule *type_module)
{
    /* XXX G_DEFINE_DYNAMIC_TYPE declares a static type registration
     *     function, so we have to wrap it with a public function in
     *     order to register types from a separate compilation unit. */
    e_task_shell_view_register_type (type_module);
}

gboolean
e_task_shell_view_get_confirm_purge (ETaskShellView *task_shell_view)
{
    g_return_val_if_fail (E_IS_TASK_SHELL_VIEW (task_shell_view), FALSE);

    return task_shell_view->priv->confirm_purge;
}

void
e_task_shell_view_set_confirm_purge (ETaskShellView *task_shell_view,
                                     gboolean confirm_purge)
{
    g_return_if_fail (E_IS_TASK_SHELL_VIEW (task_shell_view));

    if (task_shell_view->priv->confirm_purge == confirm_purge)
        return;

    task_shell_view->priv->confirm_purge = confirm_purge;

    g_object_notify (G_OBJECT (task_shell_view), "confirm-purge");
}