path: root/calendar/gui/alarm-notify/alarm-notify-dialog.c

/* Evolution calendar - alarm notification dialog
 *
 * Copyright (C) 2000 Ximian, Inc.
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Author: Federico Mena-Quintero <federico@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU 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 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.
 */

#include <config.h>
#include <stdio.h>
#include <string.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkspinbutton.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkscrolledwindow.h>
#include <gtk/gtkwindow.h>
#include <libgnome/gnome-i18n.h>
#if 0 
#  include <libgnomeui/gnome-winhints.h>
#endif
#include <libgnomeui/gnome-window-icon.h>
#include <glade/glade.h>
#include <e-util/e-time-utils.h>
#include <gal/widgets/e-unicode.h>
#include <gtkhtml/gtkhtml.h>
#include <gtkhtml/gtkhtml-stream.h>
#include "cal-util/timeutil.h"
#include "alarm-notify-dialog.h"
#include "config-data.h"


GtkWidget *make_html_display (gchar *widget_name, char *s1, char *s2, int scroll, int shadow);

/* The useful contents of the alarm notify dialog */
typedef struct {
    GladeXML *xml;

    GtkWidget *dialog;
    GtkWidget *close;
    GtkWidget *snooze;
    GtkWidget *edit;
    GtkWidget *heading;
    GtkWidget *message;
    GtkWidget *snooze_time;
    GtkWidget *html;

    AlarmNotifyFunc func;
    gpointer func_data;
} AlarmNotify;



/* Callback used when the notify dialog is destroyed */
static void
dialog_destroy_cb (GtkObject *object, gpointer data)
{
    AlarmNotify *an;

    an = data;
    g_object_unref (an->xml);
    g_free (an);
}

/* Delete_event handler for the alarm notify dialog */
static gint
delete_event_cb (GtkWidget *widget, GdkEvent *event, gpointer data)
{
    AlarmNotify *an;

    an = data;
    g_assert (an->func != NULL);

    (* an->func) (ALARM_NOTIFY_CLOSE, -1, an->func_data);

    gtk_widget_destroy (widget);
    return TRUE;
}

/* Callback for the close button */
static void
close_clicked_cb (GtkWidget *widget, gpointer data)
{
    AlarmNotify *an;

    an = data;
    g_assert (an->func != NULL);

    (* an->func) (ALARM_NOTIFY_CLOSE, -1, an->func_data);

    gtk_widget_destroy (an->dialog);
}

/* Callback for the snooze button */
static void
snooze_clicked_cb (GtkWidget *widget, gpointer data)
{
    AlarmNotify *an;
    int snooze_time;

    an = data;
    g_assert (an->func != NULL);

    snooze_time = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (an->snooze_time));
    (* an->func) (ALARM_NOTIFY_SNOOZE, snooze_time, an->func_data);

    gtk_widget_destroy (an->dialog);
}

/* Callback for the edit button */
static void
edit_clicked_cb (GtkWidget *widget, gpointer data)
{
    AlarmNotify *an;

    an = data;
    g_assert (an->func != NULL);

    (* an->func) (ALARM_NOTIFY_EDIT, -1, an->func_data);

    gtk_widget_destroy (an->dialog);
}

static void
url_requested_cb (GtkHTML *html, const char *url, GtkHTMLStream *stream, gpointer data)
{

    if (!strncmp ("file:///", url, strlen ("file:///"))) {
        FILE *fp;
        const char *filename = url + strlen ("file://");
        char buf[4096];
        size_t len;

        fp = fopen (filename, "r");

        if (fp == NULL) {
            g_warning ("Error opening image: %s\n", url);
            gtk_html_stream_close (stream, GTK_HTML_STREAM_ERROR);
            return;
        }

        while ((len = fread (buf, 1, sizeof(buf), fp)) > 0)
            gtk_html_stream_write (stream, buf, len);

        if (feof (fp)) {
            fclose (fp);
            gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
            return;
        }

        fclose (fp);
    }

    g_warning ("Error loading image");
    gtk_html_stream_close (stream, GTK_HTML_STREAM_ERROR);
    return;
}

GtkWidget *
make_html_display (gchar *widget_name, char *s1, char *s2, int scroll, int shadow)
{
    GtkWidget *html, *scrolled_window;

    gtk_widget_push_colormap (gdk_rgb_get_colormap ());

    html = gtk_html_new();

    gtk_html_set_default_content_type (GTK_HTML (html),
                       "charset=utf-8");
    gtk_html_load_empty (GTK_HTML (html));

    g_signal_connect (html, "url_requested",
              G_CALLBACK (url_requested_cb),
              NULL);

    gtk_widget_pop_colormap();

    scrolled_window = gtk_scrolled_window_new(NULL, NULL);

    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window),
                       GTK_POLICY_AUTOMATIC,
                       GTK_POLICY_AUTOMATIC);


    gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_window),
                         GTK_SHADOW_IN);

    gtk_widget_set_size_request (scrolled_window, 300, 200);

    gtk_container_add(GTK_CONTAINER (scrolled_window), html);

    gtk_widget_show_all(scrolled_window);

    g_object_set_data (G_OBJECT (scrolled_window), "html", html);
    return scrolled_window;
}

static void
write_times (GtkHTMLStream *stream, char *start, char *end)
{
    if (start)
        gtk_html_stream_printf (stream, "<b>%s</b> %s<br>", _("Starting:"), start);
    if (end)
        gtk_html_stream_printf (stream, "<b>%s</b> %s<br>", _("Ending:"), end);

}

/* Converts a time_t to a string, relative to the specified timezone */
static char *
timet_to_str_with_zone (time_t t, icaltimezone *zone)
{
    struct icaltimetype itt;
    struct tm tm;
    char buf[256];

    if (t == -1)
        return g_strdup (_("invalid time"));

    itt = icaltime_from_timet_with_zone (t, FALSE, zone);
    tm = icaltimetype_to_tm (&itt);

    e_time_format_date_and_time (&tm, config_data_get_24_hour_format (),
                     FALSE, FALSE, buf, sizeof (buf));
    return g_strdup (buf);
}

/* Creates a heading for the alarm notification dialog */
static void
write_html_heading (GtkHTMLStream *stream, const char *message,
            CalComponentVType vtype, time_t occur_start, time_t occur_end)
{
    char *buf;
    char *start, *end;
    char *bg_path = "file://" EVOLUTION_ICONSDIR "/bcg.png";
    char *image_path = "file://" EVOLUTION_ICONSDIR "/alarm.png";
    icaltimezone *current_zone;

    /* Stringize the times */

    current_zone = config_data_get_timezone ();

    buf = timet_to_str_with_zone (occur_start, current_zone);
    start = e_utf8_from_locale_string (buf);
    g_free (buf);

    buf = timet_to_str_with_zone (occur_end, current_zone);
    end = e_utf8_from_locale_string (buf);
    g_free (buf);

    /* Write the header */

    gtk_html_stream_printf (stream,
                "<HTML><BODY background=\"%s\">"
                "<TABLE WIDTH=\"100%%\">"
                "<TR>"
                "<TD><IMG SRC=\"%s\" ALIGN=\"top\" BORDER=\"0\"></TD>"
                "<TD><H1>%s</H1></TD>"
                "</TR>"
                "</TABLE>",
                bg_path,
                image_path,
                _("Evolution Alarm"));

    gtk_html_stream_printf (stream, "<br><br><font size=\"+2\">%s</font><br><br>", message);

    /* Write the times */

    switch (vtype) {
    case CAL_COMPONENT_EVENT:
        write_times (stream, start, end);
        break;

    case CAL_COMPONENT_TODO:
        write_times (stream, start, end);
        break;

    default:
        /* Only VEVENTs and VTODOs can have alarms */
        g_assert_not_reached ();
        break;
    }

    g_free (start);
    g_free (end);
}

/**
 * alarm_notify_dialog:
 * @trigger: Trigger time for the alarm.
 * @occur_start: Start of occurrence time for the event.
 * @occur_end: End of occurrence time for the event.
 * @vtype: Type of the component which corresponds to the alarm.
 * @message; Message to display in the dialog; usually comes from the component.
 * @func: Function to be called when a dialog action is invoked.
 * @func_data: Closure data for @func.
 *
 * Runs the alarm notification dialog.  The specified @func will be used to
 * notify the client about result of the actions in the dialog.
 *
 * Return value: TRUE on success, FALSE if the dialog could not be created.
 **/
gboolean
alarm_notify_dialog (time_t trigger, time_t occur_start, time_t occur_end,
             CalComponentVType vtype, const char *message,
             AlarmNotifyFunc func, gpointer func_data)
{
    AlarmNotify *an;
    GtkHTMLStream *stream;
    icaltimezone *current_zone;
    char *buf, *title;

    g_return_val_if_fail (trigger != -1, FALSE);

    /* Only VEVENTs or VTODOs can have alarms */
    g_return_val_if_fail (vtype == CAL_COMPONENT_EVENT || vtype == CAL_COMPONENT_TODO, FALSE);
    g_return_val_if_fail (message != NULL, FALSE);
    g_return_val_if_fail (func != NULL, FALSE);

    an = g_new0 (AlarmNotify, 1);

    an->func = func;
    an->func_data = func_data;

    an->xml = glade_xml_new (EVOLUTION_GLADEDIR "/alarm-notify.glade", NULL, NULL);
    if (!an->xml) {
        g_message ("alarm_notify_dialog(): Could not load the Glade XML file!");
        g_free (an);
        return FALSE;
    }

    an->dialog = glade_xml_get_widget (an->xml, "alarm-notify");
    an->close = glade_xml_get_widget (an->xml, "close");
    an->snooze = glade_xml_get_widget (an->xml, "snooze");
    an->edit = glade_xml_get_widget (an->xml, "edit");
    an->heading = glade_xml_get_widget (an->xml, "heading");
    an->message = glade_xml_get_widget (an->xml, "message");
    an->snooze_time = glade_xml_get_widget (an->xml, "snooze-time");
    an->html = g_object_get_data (G_OBJECT (glade_xml_get_widget (an->xml, "frame")), "html");

    if (!(an->dialog && an->close && an->snooze && an->edit && an->heading && an->message
          && an->snooze_time)) {
        g_message ("alarm_notify_dialog(): Could not find all widgets in Glade file!");
        g_object_unref (an->xml);
        g_free (an);
        return FALSE;
    }

    g_signal_connect (an->dialog, "destroy",
              G_CALLBACK (dialog_destroy_cb),
              an);

    /* Title */

    current_zone = config_data_get_timezone ();

    buf = timet_to_str_with_zone (trigger, current_zone);
    title = g_strdup_printf (_("Alarm on %s"), buf);
    g_free (buf);

    gtk_window_set_title (GTK_WINDOW (an->dialog), title);
    g_free (title);

    /* html heading */
    stream = gtk_html_begin (GTK_HTML (an->html));
    write_html_heading (stream, message, vtype, occur_start, occur_end);
    gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);

    /* Connect actions */

    g_signal_connect (an->dialog, "delete_event",
              G_CALLBACK (delete_event_cb),
              an);

    g_signal_connect (an->close, "clicked",
              G_CALLBACK (close_clicked_cb),
              an);

    g_signal_connect (an->snooze, "clicked",
              G_CALLBACK (snooze_clicked_cb),
              an);

    g_signal_connect (an->edit, "clicked",
              G_CALLBACK (edit_clicked_cb),
              an);

    /* Run! */

    if (!GTK_WIDGET_REALIZED (an->dialog))
        gtk_widget_realize (an->dialog);

#if 0
    gnome_win_hints_set_state (an->dialog, WIN_STATE_STICKY);
    gnome_win_hints_set_layer (an->dialog, WIN_LAYER_ONTOP);
    gnome_window_icon_set_from_file (GTK_WINDOW (an->dialog), EVOLUTION_ICONSDIR "/alarm.png");
#endif

    gtk_widget_show (an->dialog);
    return TRUE;
}