path: root/filter/filter-datespec.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright (C) 2000-2002 Ximian Inc.
 *
 *  Authors: Not Zed <notzed@lostzed.mmc.com.au>
 *           Jeffrey Stedfast <fejj@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.
 */

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

#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>

#include <gtk/gtk.h>
#include <libgnome/gnome-i18n.h>
#include <glade/glade.h>

#include "filter-datespec.h"
#include "e-util/e-sexp.h"
#include "widgets/misc/e-error.h"

#define d(x)

static gboolean validate (FilterElement *fe);
static int date_eq (FilterElement *fe, FilterElement *cm);
static void xml_create (FilterElement *fe, xmlNodePtr node);
static xmlNodePtr xml_encode (FilterElement *fe);
static int xml_decode (FilterElement *fe, xmlNodePtr node);
static GtkWidget *get_widget (FilterElement *fe);
static void build_code (FilterElement *fe, GString *out, struct _FilterPart *fds);
static void format_sexp (FilterElement *, GString *);

static void filter_datespec_class_init (FilterDatespecClass *klass);
static void filter_datespec_init (FilterDatespec *fd);
static void filter_datespec_finalise (GObject *obj);

#define PRIV(x) (((FilterDatespec *)(x))->priv)

typedef struct _timespan {
    guint32 seconds;
    const char *singular;
    const char *plural;
    float max;
} timespan;

#ifdef ngettext
#undef ngettext
#endif

/* This is a nasty hack trying to keep both ngettext function and xgettext tool happy */
/* It *will* cause problems if ngettext is a macro */
#define ngettext(a, b)  a, b

static const timespan timespans[] = {
    { 1, ngettext("1 second ago", "%d seconds ago"), 59.0 },
    { 60, ngettext("1 minute ago", "%d minutes ago"), 59.0 },
    { 3600, ngettext("1 hour ago", "%d hours ago"), 23.0 },
    { 86400, ngettext("1 day ago", "%d days ago"), 31.0 },
    { 604800, ngettext("1 week ago", "%d weeks ago"), 52.0 },
    { 2419200, ngettext("1 month ago", "%d months ago"), 12.0 },
    { 31557600, ngettext("1 year ago", "%d years ago"), 1000.0 },
};

/* now we let the compiler see the real function call */
#undef ngettext

#define DAY_INDEX 3
#define N_TIMESPANS (sizeof (timespans) / sizeof (timespans[0]))

struct _FilterDatespecPrivate {
    GtkWidget *label_button;
    GtkWidget *notebook_type, *option_type, *calendar_specify, *spin_relative, *option_relative;
    FilterDatespec_type type;
    int span;
};

static FilterElementClass *parent_class;

GType
filter_datespec_get_type (void)
{
    static GType type = 0;
    
    if (!type) {
        static const GTypeInfo info = {
            sizeof (FilterDatespecClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc) filter_datespec_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (FilterDatespec),
            0,    /* n_preallocs */
            (GInstanceInitFunc) filter_datespec_init,
        };
        
        type = g_type_register_static (FILTER_TYPE_ELEMENT, "FilterDatespec", &info, 0);
    }
    
    return type;
}

static void
filter_datespec_class_init (FilterDatespecClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    FilterElementClass *fe_class = FILTER_ELEMENT_CLASS (klass);
    
    parent_class = g_type_class_ref (FILTER_TYPE_ELEMENT);
    
    object_class->finalize = filter_datespec_finalise;
    
    /* override methods */
    fe_class->validate = validate;
    fe_class->eq = date_eq;
    fe_class->xml_create = xml_create;
    fe_class->xml_encode = xml_encode;
    fe_class->xml_decode = xml_decode;
    fe_class->get_widget = get_widget;
    fe_class->build_code = build_code;
    fe_class->format_sexp = format_sexp;
}

static void
filter_datespec_init (FilterDatespec *fd)
{
    fd->priv = g_malloc0 (sizeof (*fd->priv));
    fd->type = FDST_UNKNOWN;
}

static void
filter_datespec_finalise (GObject *obj)
{
    FilterDatespec *fd = (FilterDatespec *) obj;
    
    g_free (fd->priv);
    
        G_OBJECT_CLASS (parent_class)->finalize (obj);
}

/**
 * filter_datespec_new:
 *
 * Create a new FilterDatespec object.
 * 
 * Return value: A new #FilterDatespec object.
 **/
FilterDatespec *
filter_datespec_new (void)
{
    return (FilterDatespec *) g_object_new (FILTER_TYPE_DATESPEC, NULL, NULL);
}

static gboolean
validate (FilterElement *fe)
{
    FilterDatespec *fds = (FilterDatespec *) fe;
    gboolean valid;
    
    valid = fds->type != FDST_UNKNOWN;
    if (!valid) {
        /* FIXME: FilterElement should probably have a
                   GtkWidget member pointing to the value gotten with
                   ::get_widget() so that we can get the parent window
                   here. */
        e_error_run(NULL, "filter:no-date", NULL);
    }
    
    return valid;
}

static int
date_eq (FilterElement *fe, FilterElement *cm)
{
    FilterDatespec *fd = (FilterDatespec *)fe, *cd = (FilterDatespec *)cm;
    
        return FILTER_ELEMENT_CLASS (parent_class)->eq(fe, cm)
        && (fd->type == cd->type)
        && (fd->value == cd->value);
}

static void
xml_create (FilterElement *fe, xmlNodePtr node)
{
    /* parent implementation */
        FILTER_ELEMENT_CLASS (parent_class)->xml_create (fe, node);
}

static xmlNodePtr
xml_encode (FilterElement *fe)
{
    xmlNodePtr value, work;
    FilterDatespec *fds = (FilterDatespec *)fe;
    char str[32];
    
    d(printf ("Encoding datespec as xml\n"));
    
    value = xmlNewNode (NULL, "value");
    xmlSetProp (value, "name", fe->name);
    xmlSetProp (value, "type", "datespec");
    
    work = xmlNewChild (value, NULL, "datespec", NULL);
    sprintf (str, "%d", fds->type);
    xmlSetProp (work, "type", str);
    sprintf (str, "%d", (int)fds->value);
    xmlSetProp (work, "value", str);
    
    return value;
}

static int
xml_decode (FilterElement *fe, xmlNodePtr node)
{
    FilterDatespec *fds = (FilterDatespec *)fe;
    xmlNodePtr n;
    char *val;
    
    d(printf ("Decoding datespec from xml %p\n", fe));
    
    xmlFree (fe->name);
    fe->name = xmlGetProp (node, "name");
    
    n = node->children;
    while (n) {
        if (!strcmp (n->name, "datespec")) {
            val = xmlGetProp (n, "type");
            fds->type = atoi (val);
            xmlFree (val);
            val = xmlGetProp (n, "value");
            fds->value = atoi (val);
            xmlFree (val);
            break;
        }
        n = n->next;
    }
    
    return 0;
}

static int
get_best_span (time_t val)
{
    int i;
    
    for (i=N_TIMESPANS-1;i>=0;i--) {
        if (val % timespans[i].seconds == 0)
            return i;
    }
    
    return 0;
}

/* sets button label */
static void
set_button (FilterDatespec *fds)
{
    char buf[128];
    char *label = buf;
    
    switch (fds->type) {
    case FDST_UNKNOWN:
        label = _("<click here to select a date>");
        break;
    case FDST_NOW:
        label = _("now");
        break;
    case FDST_SPECIFIED: {
        struct tm tm;
        
        localtime_r(&fds->value, &tm);
        /* strftime for date filter display, only needs to show a day date (i.e. no time) */
        strftime(buf, sizeof(buf), _("%d-%b-%Y"), &tm);
        break; }
    case FDST_X_AGO:
        if (fds->value == 0)
            label = _("now");
        else {
            int span, count;
            
            span = get_best_span(fds->value);
            count = fds->value / timespans[span].seconds;
            
            sprintf(buf, ngettext(timespans[span].singular, timespans[span].plural, count), count);
        }
        break;
    }
    
    gtk_label_set_text((GtkLabel *)fds->priv->label_button, label);
}

static void
get_values (FilterDatespec *fds)
{
    struct _FilterDatespecPrivate *p = PRIV(fds);
    
    switch(fds->priv->type) {
    case FDST_SPECIFIED: {
        guint year, month, day;
        struct tm tm;
        
        gtk_calendar_get_date((GtkCalendar *)p->calendar_specify, &year, &month, &day);
        memset(&tm, 0, sizeof(tm));
        tm.tm_mday = day;
        tm.tm_year = year - 1900;
        tm.tm_mon = month;
        fds->value = mktime(&tm);
        /* what about timezone? */
        break; }
    case FDST_X_AGO: {
        int val;
        
        val = gtk_spin_button_get_value_as_int((GtkSpinButton *)p->spin_relative);
        fds->value = timespans[p->span].seconds * val;
        break; }
    case FDST_NOW:
    default:
        break;
    }
    
    fds->type = p->type;
}

static void
set_values (FilterDatespec *fds)
{
    struct _FilterDatespecPrivate *p = PRIV(fds);
    
    p->type = fds->type==FDST_UNKNOWN ? FDST_NOW : fds->type;
    
    switch (p->type) {
    case FDST_NOW:
    case FDST_UNKNOWN:
        /* noop */
        break;
    case FDST_SPECIFIED:
    {
        struct tm tm;
        
        localtime_r(&fds->value, &tm);
        gtk_calendar_select_month((GtkCalendar*)p->calendar_specify, tm.tm_mon, tm.tm_year + 1900);
        gtk_calendar_select_day((GtkCalendar*)p->calendar_specify, tm.tm_mday);
        break;
    }
    case FDST_X_AGO:
        p->span = get_best_span(fds->value);
        gtk_spin_button_set_value((GtkSpinButton*)p->spin_relative, fds->value/timespans[p->span].seconds);
        gtk_option_menu_set_history((GtkOptionMenu*)p->option_relative, p->span);
        break;
    }
    
    gtk_notebook_set_current_page ((GtkNotebook*) p->notebook_type, p->type);
    gtk_option_menu_set_history ((GtkOptionMenu*) p->option_type, p->type);
}


static void
set_option_type (GtkMenu *menu, FilterDatespec *fds)
{
    GtkWidget *w;

    /* ugh, no other way to 'get_history' */
    w = gtk_menu_get_active (menu);
    fds->priv->type = g_list_index (GTK_MENU_SHELL (menu)->children, w);
    gtk_notebook_set_current_page ((GtkNotebook*) fds->priv->notebook_type, fds->priv->type);
}

static void
set_option_relative (GtkMenu *menu, FilterDatespec *fds)
{
    GtkWidget *w;
    
    w = gtk_menu_get_active (menu);
    fds->priv->span = g_list_index (GTK_MENU_SHELL (menu)->children, w);
}

static void
button_clicked (GtkButton *button, FilterDatespec *fds)
{
    struct _FilterDatespecPrivate *p = PRIV(fds);
    GtkWidget *toplevel;
    GtkDialog *dialog;
    GladeXML *gui;
    
    gui = glade_xml_new (FILTER_GLADEDIR "/filter.glade", "filter_datespec", NULL);
    toplevel = glade_xml_get_widget (gui, "filter_datespec");
    
    dialog = (GtkDialog *) gtk_dialog_new ();
    gtk_window_set_title ((GtkWindow *) dialog, _("Select a time to compare against"));
    gtk_dialog_add_buttons (dialog,
                GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                GTK_STOCK_OK, GTK_RESPONSE_OK,
                NULL);
    gtk_dialog_set_has_separator (dialog, FALSE);
    
    p->notebook_type = glade_xml_get_widget (gui, "notebook_type");
    p->option_type = glade_xml_get_widget (gui, "option_type");
    p->calendar_specify = glade_xml_get_widget (gui, "calendar_specify");
    p->spin_relative = glade_xml_get_widget (gui, "spin_relative");
    p->option_relative = glade_xml_get_widget (gui, "option_relative");
    
    set_values (fds);
    
    g_signal_connect (GTK_OPTION_MENU (p->option_type)->menu, "deactivate",
              G_CALLBACK (set_option_type), fds);
    g_signal_connect (GTK_OPTION_MENU (p->option_relative)->menu, "deactivate",
              G_CALLBACK (set_option_relative), fds);
    
    gtk_box_pack_start ((GtkBox *) dialog->vbox, toplevel, TRUE, TRUE, 3);
    
    if (gtk_dialog_run (dialog) == GTK_RESPONSE_OK) {
        get_values (fds);
        set_button (fds);
    }
    
    gtk_widget_destroy ((GtkWidget *)dialog);
}

static GtkWidget *
get_widget (FilterElement *fe)
{
    FilterDatespec *fds = (FilterDatespec *)fe;
    GtkWidget *button;
    
    fds->priv->label_button = gtk_label_new ("");
    gtk_misc_set_alignment (GTK_MISC (fds->priv->label_button), 0.5, 0.5);
    set_button(fds);
    
    button = gtk_button_new();
    gtk_container_add (GTK_CONTAINER (button), fds->priv->label_button);
    g_signal_connect (button, "clicked", G_CALLBACK (button_clicked), fds);
    
    gtk_widget_show (button);
    gtk_widget_show (fds->priv->label_button);
    
    return button;
}

static void 
build_code (FilterElement *fe, GString *out, struct _FilterPart *fp)
{
    return;
}

static void 
format_sexp (FilterElement *fe, GString *out)
{
    FilterDatespec *fds = (FilterDatespec *)fe;
    
    switch (fds->type) {
    case FDST_UNKNOWN:
        g_warning ("user hasn't selected a datespec yet!");
        /* fall through */
    case FDST_NOW:
        g_string_append (out, "(get-current-date)");
        break;
    case FDST_SPECIFIED:
        g_string_append_printf (out, "%d", (int) fds->value);
        break;
    case FDST_X_AGO:
        g_string_append_printf (out, "(- (get-current-date) %d)", (int) fds->value);
        break;
    }
}