path: root/shell/e-activity-handler.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-activity-handler.c
 *
 * Copyright (C) 2001  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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.
 *
 * Author: Ettore Perazzoli <ettore@ximian.com>
 */

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

#include "e-activity-handler.h"

#include <gtk/gtksignal.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-popup-menu.h>

#include <gal/util/e-util.h>
#include <gal/widgets/e-popup-menu.h>


#define PARENT_TYPE bonobo_x_object_get_type ()
static BonoboXObjectClass *parent_class = NULL;


#define ICON_SIZE 16


struct _ActivityInfo {
    GdkPixbuf *icon_pixbuf;
    GNOME_Evolution_Activity_ActivityId id;
    CORBA_char *information;
    CORBA_boolean cancellable;
    Bonobo_Listener event_listener;
    CORBA_float progress;
};
typedef struct _ActivityInfo ActivityInfo;

struct _EActivityHandlerPrivate {
    GNOME_Evolution_Activity_ActivityId next_activity_id;
    GList *activity_infos;
    GSList *task_bars;
};


/* Utility functions.  */

static GdkPixbuf *
create_gdk_pixbuf_from_corba_icon (const GNOME_Evolution_Icon *icon)
{
    GdkPixbuf *pixbuf;
    GdkPixbuf *scaled_pixbuf;
    unsigned char *p;
    int src_offset;
    int i, j;
    int rowstride;
    int total_width;

    pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, icon->hasAlpha, 8, icon->width, icon->height);

    if (icon->hasAlpha)
        total_width = 4 * icon->width;
    else
        total_width = 3 * icon->width;

    rowstride = gdk_pixbuf_get_rowstride (pixbuf);
    src_offset = 0;
    p = gdk_pixbuf_get_pixels (pixbuf);

    for (i = 0; i < icon->height; i++) {
        for (j = 0; j < total_width; j++)
            p[j] = icon->rgba_data._buffer[src_offset ++];
        p += rowstride;
    }

    if (icon->width == ICON_SIZE && icon->height == ICON_SIZE)
        return pixbuf;
        
    scaled_pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, icon->hasAlpha, 8, ICON_SIZE, ICON_SIZE);
    gdk_pixbuf_scale (pixbuf, scaled_pixbuf,
              0, 0, ICON_SIZE, ICON_SIZE,
              0, 0, (double) ICON_SIZE / icon->width, (double) ICON_SIZE / icon->height,
              GDK_INTERP_HYPER);

    gdk_pixbuf_unref (pixbuf);

    return scaled_pixbuf;
}

static unsigned int
get_new_activity_id (EActivityHandler *activity_handler)
{
    EActivityHandlerPrivate *priv;

    priv = activity_handler->priv;

    return priv->next_activity_id ++;
}

static GList *
lookup_activity (GList *list,
         GNOME_Evolution_Activity_ActivityId activity_id,
         int *order_number_return)
{
    GList *p;
    int i;

    for (p = list, i = 0; p != NULL; p = p->next, i ++) {
        ActivityInfo *activity_info;

        activity_info = (ActivityInfo *) p->data;
        if (activity_info->id == activity_id) {
            *order_number_return = i;
            return p;
        }
    }

    *order_number_return = -1;
    return NULL;
}

static const CORBA_any *
get_corba_null_value (void)
{
    static CORBA_any *null_value = NULL;

    if (null_value == NULL) {
        null_value = CORBA_any__alloc ();
        null_value->_type = TC_null;
    }

    return null_value;
}

static void
report_task_event (ActivityInfo *activity_info,
           const char *event_name)
{
    CORBA_Environment ev;

    CORBA_exception_init (&ev);

    Bonobo_Listener_event (activity_info->event_listener, event_name, get_corba_null_value (), &ev);
    if (ev._major != CORBA_NO_EXCEPTION)
        g_warning ("EActivityHandler: Cannot event `%s' -- %s", event_name, ev._repo_id);

    CORBA_exception_free (&ev);
}


/* ETaskWidget actions.  */

static void
task_widget_cancel_callback (GtkWidget *widget,
                 void *data)
{
    ActivityInfo *activity_info;

    activity_info = (ActivityInfo *) data;
    report_task_event (activity_info, "Cancel");
}

static void
task_widget_show_details_callback (GtkWidget *widget,
                   void *data)
{
    ActivityInfo *activity_info;

    activity_info = (ActivityInfo *) data;
    report_task_event (activity_info, "ShowDetails");
}

static void
show_cancellation_popup (ActivityInfo *activity_info,
             GtkWidget *task_widget,
             GdkEventButton *button_event)
{
    GtkMenu *popup;
    EPopupMenu items[] = {
        { N_("Show Details"), NULL, task_widget_show_details_callback, NULL, 0 },
        { "", NULL, NULL, NULL, 0 },
        { N_("Cancel Operation"), NULL, task_widget_cancel_callback, NULL, 0 },
        { NULL }
    };

    /* FIXME: We should gray out things properly here.  */
    popup = e_popup_menu_create (items, 0, 0, activity_info);
    gnome_popup_menu_do_popup (GTK_WIDGET (popup), NULL, NULL, button_event, activity_info);
}

static int
task_widget_button_press_event_callback (GtkWidget *widget,
                     GdkEventButton *button_event,
                     void *data)
{
    CORBA_Environment ev;
    ActivityInfo *activity_info;
    CORBA_any *null_value;

    activity_info = (ActivityInfo *) data;

    if (button_event->button == 3) {
        if (! activity_info->cancellable) {
            return FALSE;
        } else {
            show_cancellation_popup (activity_info, widget, button_event);
            return TRUE;
        }
    }

    if (button_event->button != 1)
        return FALSE;

    CORBA_exception_init (&ev);

    null_value = CORBA_any__alloc ();
    null_value->_type = TC_null;

    Bonobo_Listener_event (activity_info->event_listener, "Clicked", null_value, &ev);
    if (ev._major != CORBA_NO_EXCEPTION)
        g_warning ("EActivityHandler: Cannot report `Clicked' event -- %s",
               ev._repo_id);

    CORBA_free (null_value);
 
    CORBA_exception_free (&ev);

    return TRUE;
}


/* Creating and destroying ActivityInfos.  */

static ActivityInfo *
activity_info_new (GNOME_Evolution_Activity_ActivityId id,
           GdkPixbuf *icon,
           const CORBA_char *information,
           CORBA_boolean cancellable,
           const Bonobo_Listener event_listener)
{
    ActivityInfo *info;
    CORBA_Environment ev;

    CORBA_exception_init (&ev);

    info = g_new (ActivityInfo, 1);
    info->id             = id;
    info->icon_pixbuf    = gdk_pixbuf_ref (icon);
    info->information    = CORBA_string_dup (information);
    info->cancellable    = cancellable;
    info->event_listener = CORBA_Object_duplicate (event_listener, &ev);
    info->progress       = -1.0; /* (Unknown) */

    CORBA_exception_free (&ev);

    return info;
}

static void
activity_info_free (ActivityInfo *info)
{
    CORBA_Environment ev;

    CORBA_exception_init (&ev);

    CORBA_free (info->information);
    CORBA_Object_release (info->event_listener, &ev);

    g_free (info);

    CORBA_exception_free (&ev);
}

static ETaskWidget *
task_widget_new_from_activity_info (ActivityInfo *activity_info)
{
    GtkWidget *widget;

    widget = e_task_widget_new (activity_info->icon_pixbuf, activity_info->information);
    gtk_widget_show (widget);

    gtk_signal_connect (GTK_OBJECT (widget), "button_press_event",
                GTK_SIGNAL_FUNC (task_widget_button_press_event_callback), activity_info);

    return E_TASK_WIDGET (widget);
}


/* Task Bar handling.  */

static void
setup_task_bar (EActivityHandler *activity_handler,
        ETaskBar *task_bar)
{
    EActivityHandlerPrivate *priv;
    GList *p;

    priv = activity_handler->priv;

    for (p = g_list_last (priv->activity_infos); p != NULL; p = p->prev) {
        e_task_bar_prepend_task (task_bar,
                     task_widget_new_from_activity_info ((ActivityInfo *) p->data));
    }
}

static void
task_bar_destroy_callback (GtkObject *task_bar_object,
               void *data)
{
    ETaskBar *task_bar;
    EActivityHandler *activity_handler;
    EActivityHandlerPrivate *priv;

    task_bar = E_TASK_BAR (task_bar_object);

    activity_handler = E_ACTIVITY_HANDLER (data);
    priv = activity_handler->priv;

    priv->task_bars = g_slist_remove (priv->task_bars, task_bar);
}


/* GtkObject methods.  */

static void
impl_destroy (GtkObject *object)
{
    EActivityHandler *handler;
    EActivityHandlerPrivate *priv;
    GList *p;

    handler = E_ACTIVITY_HANDLER (object);
    priv = handler->priv;

    for (p = priv->activity_infos; p != NULL; p = p->next) {
        ActivityInfo *info;

        info = (ActivityInfo *) p->data;
        activity_info_free (info);
    }

    g_free (priv);

    (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


/* CORBA methods.  */

static void
impl_operationStarted (PortableServer_Servant servant,
               const CORBA_char *component_id,
               const GNOME_Evolution_AnimatedIcon *icon,
               const CORBA_char *information,
               const CORBA_boolean cancellable,
               const Bonobo_Listener event_listener,
               GNOME_Evolution_Activity_ActivityId *activity_id_return,
               CORBA_boolean *suggest_display_return,
               CORBA_Environment *ev)
{
    EActivityHandler *activity_handler;
    EActivityHandlerPrivate *priv;
    ActivityInfo *activity_info;
    GdkPixbuf *icon_pixbuf;
    unsigned int activity_id;
    GSList *p;

    activity_handler = E_ACTIVITY_HANDLER (bonobo_object_from_servant (servant));
    priv = activity_handler->priv;

    if (icon->_length == 0) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Activity_InvalidIcon, NULL);
        return;
    }

    if (icon->_length > 1)
        g_warning ("Animated icons are not supported for activities (yet).");

    icon_pixbuf = create_gdk_pixbuf_from_corba_icon (icon->_buffer);

    activity_id = get_new_activity_id (activity_handler);

    activity_info = activity_info_new (activity_id, icon_pixbuf, information, cancellable, event_listener);

    for (p = priv->task_bars; p != NULL; p = p->next)
        e_task_bar_prepend_task (E_TASK_BAR (p->data),
                     task_widget_new_from_activity_info (activity_info));

    priv->activity_infos = g_list_prepend (priv->activity_infos, activity_info);

    *activity_id_return = activity_id;
}

static void
impl_operationProgressing (PortableServer_Servant servant,
               const GNOME_Evolution_Activity_ActivityId activity_id,
               const CORBA_char *information,
               const CORBA_float progress,
               CORBA_Environment *ev)
{
    EActivityHandler *activity_handler;
    EActivityHandlerPrivate *priv;
    ActivityInfo *activity_info;
    GList *p;
    GSList *sp;
    int order_number;

    /* FIXME?  The complexity in this function sucks.  */

    activity_handler = E_ACTIVITY_HANDLER (bonobo_object_from_servant (servant));
    priv = activity_handler->priv;

    p = lookup_activity (priv->activity_infos, activity_id, &order_number);
    if (p == NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Activity_IdNotFound, NULL);
        return;
    }

    activity_info = (ActivityInfo *) p->data;

    CORBA_free (activity_info->information);
    activity_info->information = CORBA_string_dup (information);

    activity_info->progress = progress;

    for (sp = priv->task_bars; sp != NULL; sp = sp->next) {
        ETaskBar *task_bar;
        ETaskWidget *task_widget;

        task_bar = E_TASK_BAR (sp->data);
        task_widget = e_task_bar_get_task_widget (task_bar, order_number);

        e_task_widget_update (task_widget, information, progress);
    }
}

static void
impl_operationFinished (PortableServer_Servant servant,
            const GNOME_Evolution_Activity_ActivityId activity_id,
            CORBA_Environment *ev)
{
    EActivityHandler *activity_handler;
    EActivityHandlerPrivate *priv;
    GList *p;
    GSList *sp;
    int order_number;

    activity_handler = E_ACTIVITY_HANDLER (bonobo_object_from_servant (servant));
    priv = activity_handler->priv;

    p = lookup_activity (priv->activity_infos, activity_id, &order_number);

    activity_info_free ((ActivityInfo *) p->data);
    priv->activity_infos = g_list_remove_link (priv->activity_infos, p);

    for (sp = priv->task_bars; sp != NULL; sp = sp->next) {
        ETaskBar *task_bar;

        task_bar = E_TASK_BAR (sp->data);
        e_task_bar_remove_task (task_bar, order_number);
    }
}

static GNOME_Evolution_Activity_DialogAction
impl_requestDialog (PortableServer_Servant servant,
            const GNOME_Evolution_Activity_ActivityId activity_id,
            const GNOME_Evolution_Activity_DialogType dialog_type,
            CORBA_Environment *ev)
{
    /* FIXME implement.  */
    g_warning ("Evolution::Activity::requestDialog not implemented");

    return GNOME_Evolution_Activity_DIALOG_ACTION_DISPLAY;
}


/* GTK+ type stuff.  */

static void
class_init (GtkObjectClass *object_class)
{
    EActivityHandlerClass *handler_class;

    parent_class = gtk_type_class (PARENT_TYPE);

    object_class->destroy = impl_destroy;

    handler_class = E_ACTIVITY_HANDLER_CLASS (object_class);
    handler_class->epv.operationStarted     = impl_operationStarted;
    handler_class->epv.operationProgressing = impl_operationProgressing;
    handler_class->epv.operationFinished    = impl_operationFinished;
    handler_class->epv.requestDialog        = impl_requestDialog;
}

static void
init (EActivityHandler *activity_handler)
{
    EActivityHandlerPrivate *priv;

    priv = g_new (EActivityHandlerPrivate, 1);
    priv->next_activity_id = 0;
    priv->activity_infos   = NULL;
    priv->task_bars        = NULL;

    activity_handler->priv = priv;
}


void
e_activity_handler_construct (EActivityHandler *activity_handler)
{
    g_return_if_fail (activity_handler != NULL);
    g_return_if_fail (E_IS_ACTIVITY_HANDLER (activity_handler));

    /* Nothing to do here.  */
}

EActivityHandler *
e_activity_handler_new (void)
{
    EActivityHandler *activity_handler;

    activity_handler = gtk_type_new (e_activity_handler_get_type ());
    e_activity_handler_construct (activity_handler);

    return activity_handler;
}


void
e_activity_handler_attach_task_bar (EActivityHandler *activity_handler,
                    ETaskBar *task_bar)
{
    EActivityHandlerPrivate *priv;

    g_return_if_fail (activity_handler != NULL);
    g_return_if_fail (E_IS_ACTIVITY_HANDLER (activity_handler));
    g_return_if_fail (task_bar != NULL);
    g_return_if_fail (E_IS_TASK_BAR (task_bar));

    priv = activity_handler->priv;

    gtk_signal_connect_while_alive (GTK_OBJECT (task_bar), "destroy",
                    GTK_SIGNAL_FUNC (task_bar_destroy_callback), activity_handler,
                    GTK_OBJECT (activity_handler));

    priv->task_bars = g_slist_prepend (priv->task_bars, task_bar);

    setup_task_bar (activity_handler, task_bar);
}


E_MAKE_X_TYPE (e_activity_handler, "EActivityHandler", EActivityHandler, class_init, init, PARENT_TYPE,
           POA_GNOME_Evolution_Activity__init,
           GTK_STRUCT_OFFSET (EActivityHandlerClass, epv))