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path: root/calendar/gui/e-cal-component-preview.c
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/*
 * 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/>
 *
 *
 * Authors:
 *      Federico Mena Quintero <federico@ximian.com>
 *      Damon Chaplin <damon@ximian.com>
 *      Rodrigo Moya <rodrigo@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-cal-component-preview.h"

#include <string.h>
#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <libecal/e-cal-time-util.h>
#include <libedataserver/e-categories.h>
#include <gtkhtml/gtkhtml-stream.h>
#include <libedataserver/e-time-utils.h>
#include <e-util/e-util.h>
#include <e-util/e-categories-config.h>
#include "calendar-config.h"
#include <camel/camel-mime-filter-tohtml.h>

#define E_CAL_COMPONENT_PREVIEW_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_CAL_COMPONENT_PREVIEW, ECalComponentPreviewPrivate))

struct _ECalComponentPreviewPrivate {
    icaltimezone *zone;
};

static gpointer parent_class;

static void
cal_component_preview_link_clicked (GtkHTML *html,
                                    const gchar *uri)
{
    /* FIXME Pass a parent window. */
    e_show_uri (NULL, uri);
}

static void
cal_component_preview_on_url (GtkHTML *html,
                              const gchar *url)
{
#if 0
    gchar *msg;
    ECalComponentPreview *preview = data;

    if (url && *url) {
        msg = g_strdup_printf (_("Click to open %s"), url);
        e_calendar_table_set_status_message (e_tasks_get_calendar_table (tasks), msg);
        g_free (msg);
    } else
        e_calendar_table_set_status_message (e_tasks_get_calendar_table (tasks), NULL);
#endif
}

/* Converts a time_t to a string, relative to the specified timezone */
static gchar *
timet_to_str_with_zone (ECalComponentDateTime *dt,
                        ECal *ecal,
                        icaltimezone *default_zone)
{
    struct icaltimetype itt;
    icaltimezone *zone;
        struct tm tm;
        gchar buf[256];

    if (dt->tzid) {
        /* If we can't find the zone, we'll guess its "local" */
        if (!e_cal_get_timezone (ecal, dt->tzid, &zone, NULL))
            zone = NULL;
    } else if (dt->value->is_utc) {
        zone = icaltimezone_get_utc_timezone ();
    } else {
        zone = NULL;
    }

    itt = *dt->value;
    if (zone)
        icaltimezone_convert_time (&itt, zone, default_zone);
        tm = icaltimetype_to_tm (&itt);

        e_time_format_date_and_time (&tm, calendar_config_get_24_hour_format (),
                                     FALSE, FALSE, buf, sizeof (buf));

    return g_locale_to_utf8 (buf, -1, NULL, NULL, NULL);
}

static void
cal_component_preview_write_html (GtkHTMLStream *stream,
                                  ECal *ecal,
                                  ECalComponent *comp,
                                  icaltimezone *default_zone)
{
    ECalComponentText text;
    ECalComponentDateTime dt;
    gchar *str;
    GString *string;
    GSList *list, *iter;
    icalcomponent *icalcomp;
    icalproperty *icalprop;
    icalproperty_status status;
    const gchar *location;
    gint *priority_value;

    g_return_if_fail (E_IS_CAL_COMPONENT (comp));

    /* write document header */
    e_cal_component_get_summary (comp, &text);

    if (text.value)
        gtk_html_stream_printf (stream,
                    "<HTML><BODY><H1>%s</H1>",
                    text.value);
    else
        gtk_html_stream_printf (stream,
                    "<HTML><BODY><H1><I>%s</I></H1>",
                    _("Untitled"));

    /* write icons for the categories */
    string = g_string_new (NULL);
    e_cal_component_get_categories_list (comp, &list);
    if (list != NULL)
        gtk_html_stream_printf (stream, "<H3>%s ", _("Categories:"));
    for (iter = list; iter != NULL; iter = iter->next) {
        const gchar *category = iter->data;
        const gchar *icon_file;

        icon_file = e_categories_get_icon_file_for (category);
        if (icon_file && g_file_test (icon_file, G_FILE_TEST_EXISTS)) {
            gchar *uri;

            uri = g_filename_to_uri (icon_file, NULL, NULL);
            gtk_html_stream_printf (
                stream, "<IMG ALT=\"%s\" SRC=\"%s\">",
                category, uri);
            g_free (uri);
        } else {
            if (iter != list)
                g_string_append_len (string, ", ", 2);
            g_string_append (string, category);
        }
    }
    if (string->len > 0)
        gtk_html_stream_printf (stream, "%s</H3>", string->str);
    e_cal_component_free_categories_list (list);
    g_string_free (string, TRUE);

    /* Start table */
    gtk_html_stream_printf (stream, "<TABLE BORDER=\"0\" WIDTH=\"80%%\">"
                "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\" WIDTH=\"15%%\"></TD></TR>");

    /* write location */
    e_cal_component_get_location (comp, &location);
    if (location)
        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\" WIDTH=\"15%%\"><B>%s</B></TD><TD>%s</TD></TR>",
                    _("Summary:"), text.value);

    /* write start date */
    e_cal_component_get_dtstart (comp, &dt);
    if (dt.value != NULL) {
        str = timet_to_str_with_zone (&dt, ecal, default_zone);
        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD><TD>%s</TD></TR>",
                    _("Start Date:"), str);

        g_free (str);
    }
    e_cal_component_free_datetime (&dt);

    /* write end date */
    e_cal_component_get_dtend (comp, &dt);
    if (dt.value != NULL) {
        str = timet_to_str_with_zone (&dt, ecal, default_zone);
        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD><TD>%s</TD></TR>",
                    _("Start Date:"), str);

        g_free (str);
    }
    e_cal_component_free_datetime (&dt);

    /* write Due Date */
    e_cal_component_get_due (comp, &dt);
    if (dt.value != NULL) {
        str = timet_to_str_with_zone (&dt, ecal, default_zone);
        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD><TD>%s</TD></TR>",
                    _("Due Date:"), str);

        g_free (str);
    }
    e_cal_component_free_datetime (&dt);

    /* write status */
    icalcomp = e_cal_component_get_icalcomponent (comp);
    icalprop = icalcomponent_get_first_property (
        icalcomp, ICAL_STATUS_PROPERTY);
    if (icalprop != NULL) {
        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Status:"));
        e_cal_component_get_status (comp, &status);
        switch (status) {
        case ICAL_STATUS_INPROCESS :
            str = g_strdup (_("In Progress"));
            break;
        case ICAL_STATUS_COMPLETED :
            str = g_strdup (_("Completed"));
            break;
        case ICAL_STATUS_CANCELLED :
            str = g_strdup (_("Canceled"));
            break;
        case ICAL_STATUS_NONE :
        default :
            str = g_strdup (_("Not Started"));
            break;
        }

        gtk_html_stream_printf (stream, "<TD>%s</TD></TR>", str);
        g_free (str);
    }

    /* write priority */
    e_cal_component_get_priority (comp, &priority_value);
    if (priority_value && *priority_value != 0) {
        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Priority:"));
        if (*priority_value <= 4)
            str = g_strdup (_("High"));
        else if (*priority_value == 5)
            str = g_strdup (_("Normal"));
        else
            str = g_strdup (_("Low"));

        gtk_html_stream_printf (stream, "<TD>%s</TD></TR>", str);

        g_free (str);
    }

    if (priority_value)
        e_cal_component_free_priority (priority_value);

    /* write description and URL */
    gtk_html_stream_printf (stream, "<TR><TD COLSPAN=\"2\"><HR></TD></TR>");

    e_cal_component_get_description_list (comp, &list);
    if (list) {
        GSList *node;

        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Description:"));

        gtk_html_stream_printf (stream, "<TD><TT>");

        for (node = list; node != NULL; node = node->next) {
            gchar *html;

            text = * (ECalComponentText *) node->data;
            html = camel_text_to_html (text.value ? text.value : "", CAMEL_MIME_FILTER_TOHTML_CONVERT_NL | CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES | CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS | CAMEL_MIME_FILTER_TOHTML_CONVERT_ADDRESSES, 0);

            if (html)
                gtk_html_stream_printf (stream, "%s", html);

            g_free (html);
        }

        gtk_html_stream_printf (stream, "</TT></TD></TR>");

        e_cal_component_free_text_list (list);
    }

    /* URL */
    e_cal_component_get_url (comp, (const gchar **) &str);
    if (str) {
        gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Web Page:"));
        gtk_html_stream_printf (stream, "<TD><A HREF=\"%s\">%s</A></TD></TR>", str, str);
    }

    gtk_html_stream_printf (stream, "</TABLE>");

    /* close document */
    gtk_html_stream_printf (stream, "</BODY></HTML>");
}

static void
cal_component_preview_finalize (GObject *object)
{
    ECalComponentPreviewPrivate *priv;

    priv = E_CAL_COMPONENT_PREVIEW_GET_PRIVATE (object);

    /* XXX Nothing to do? */

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

static void
cal_component_preview_class_init (ECalComponentPreviewClass *class)
{
    GObjectClass *object_class;
    GtkHTMLClass *gtkhtml_class;

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

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = cal_component_preview_finalize;

    gtkhtml_class = GTK_HTML_CLASS (class);
    gtkhtml_class->link_clicked = cal_component_preview_link_clicked;
    gtkhtml_class->on_url = cal_component_preview_on_url;
}

static void
cal_component_preview_init (ECalComponentPreview *preview)
{
    GtkHTML *html;

    preview->priv = E_CAL_COMPONENT_PREVIEW_GET_PRIVATE (preview);

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

    preview->priv->zone = icaltimezone_get_utc_timezone ();
}

GType
e_cal_component_preview_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (ECalComponentPreviewClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) cal_component_preview_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (ECalComponentPreview),
            0,     /* n_preallocs */
            (GInstanceInitFunc) cal_component_preview_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            GTK_TYPE_HTML, "ECalComponentPreview", &type_info, 0);
    }

    return type;
}

GtkWidget *
e_cal_component_preview_new (void)
{
    return g_object_new (E_TYPE_CAL_COMPONENT_PREVIEW, NULL);
}

icaltimezone *
e_cal_component_preview_get_default_timezone (ECalComponentPreview *preview)
{
    g_return_val_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview), NULL);

    return preview->priv->zone;
}

void
e_cal_component_preview_set_default_timezone (ECalComponentPreview *preview,
                                              icaltimezone *zone)
{
    g_return_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview));
    g_return_if_fail (zone != NULL);

    preview->priv->zone = zone;
}

void
e_cal_component_preview_display (ECalComponentPreview *preview,
                                 ECal *ecal,
                                 ECalComponent *comp)
{
    GtkHTMLStream *stream;

    g_return_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview));
    g_return_if_fail (E_IS_CAL_COMPONENT (comp));

    stream = gtk_html_begin (GTK_HTML (preview));
    cal_component_preview_write_html (
        stream, ecal, comp, preview->priv->zone);
    gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
}

void
e_cal_component_preview_clear (ECalComponentPreview *preview)
{
    g_return_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview));

    gtk_html_load_empty (GTK_HTML (preview));
}