path: root/composer/e-msg-composer-attachment-bar.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-msg-composer-attachment-bar.c
 *
 * Copyright (C) 1999  Helix Code, 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
 */

#include <gnome.h>
#include <glade/glade.h>

#include "e-msg-composer-attachment.h"
#include "e-msg-composer-attachment-bar.h"
#include "camel/camel-simple-data-wrapper.h"
#include "camel/camel-stream-fs.h"


#define ICON_WIDTH 64
#define ICON_SEPARATORS " /-_"
#define ICON_SPACING 2
#define ICON_ROW_SPACING ICON_SPACING
#define ICON_COL_SPACING ICON_SPACING
#define ICON_BORDER 2
#define ICON_TEXT_SPACING 2


static GnomeIconListClass *parent_class = NULL;

struct _EMsgComposerAttachmentBarPrivate {
    GList *attachments;
    guint num_attachments;

    GtkWidget *context_menu;
    GtkWidget *icon_context_menu;
};


enum {
    CHANGED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };


static void update (EMsgComposerAttachmentBar *bar);


static gchar *
size_to_string (gulong size)
{
    gchar *size_string;

    /* FIXME: The following should probably go into a separate module, as
           we might have to do the same thing in other places as well.  Also,
       I am not sure this will be OK for all the languages.  */

    if (size < 1e3L) {
        if (size == 1)
            size_string = g_strdup (_("1 byte"));
        else
            size_string = g_strdup_printf (_("%u bytes"),
                               (guint) size);
    } else {
        gdouble displayed_size;

        if (size < 1e6L) {
            displayed_size = (gdouble) size / 1.0e3;
            size_string = g_strdup_printf (_("%.1fK"),
                               displayed_size);
        } else if (size < 1e9L) {
            displayed_size = (gdouble) size / 1.0e6;
            size_string = g_strdup_printf (_("%.1fM"),
                               displayed_size);
        } else {
            displayed_size = (gdouble) size / 1.0e9;
            size_string = g_strdup_printf (_("%.1fG"),
                               displayed_size);
        }
    }

    return size_string;
}


/* Sorting.  */

static gint
attachment_sort_func (gconstpointer a, gconstpointer b)
{
    const EMsgComposerAttachment *attachment_a, *attachment_b;

    attachment_a = (EMsgComposerAttachment *) a;
    attachment_b = (EMsgComposerAttachment *) b;

    return strcmp (attachment_a->description, attachment_b->description);
}

static void
sort (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;

    priv = bar->priv;

    priv->attachments = g_list_sort (priv->attachments,
                     attachment_sort_func);
}


/* Attachment handling functions.  */

static void
free_attachment_list (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    GList *p;

    priv = bar->priv;

    for (p = priv->attachments; p != NULL; p = p->next)
        gtk_object_unref (GTK_OBJECT (p->data));
}

static void
attachment_changed_cb (EMsgComposerAttachment *attachment,
               gpointer data)
{
    update (E_MSG_COMPOSER_ATTACHMENT_BAR (data));
}

static void
add_from_file (EMsgComposerAttachmentBar *bar,
           const gchar *file_name)
{
    EMsgComposerAttachment *attachment;

    attachment = e_msg_composer_attachment_new (file_name);

    gtk_signal_connect (GTK_OBJECT (attachment), "changed",
                GTK_SIGNAL_FUNC (attachment_changed_cb),
                bar);

    bar->priv->attachments = g_list_append (bar->priv->attachments,
                        attachment);
    bar->priv->num_attachments++;

    sort (bar);
    update (bar);

    gtk_signal_emit (GTK_OBJECT (bar), signals[CHANGED]);
}

static void
remove_attachment (EMsgComposerAttachmentBar *bar,
           EMsgComposerAttachment *attachment)
{
    bar->priv->attachments = g_list_remove (bar->priv->attachments,
                        attachment);
    bar->priv->num_attachments--;

    gtk_object_unref (GTK_OBJECT (attachment));

    gtk_signal_emit (GTK_OBJECT (bar), signals[CHANGED]);
}


/* Icon list contents handling.  */

static void
update (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    GnomeIconList *icon_list;
    GList *p;

    priv = bar->priv;
    icon_list = GNOME_ICON_LIST (bar);

    gnome_icon_list_freeze (icon_list);

    gnome_icon_list_clear (icon_list);

    /* FIXME could be faster, but we don't care.  */

    for (p = priv->attachments; p != NULL; p = p->next) {
        EMsgComposerAttachment *attachment;
        const gchar *icon_name;
        gchar *size_string;
        gchar *label;

        attachment = p->data;
        icon_name = gnome_mime_get_value (attachment->mime_type,
                          "icon-filename");

        /* FIXME we need some better default icon.  */
        if (icon_name == NULL)
            icon_name = gnome_mime_get_value ("text/plain",
                              "icon-filename");

        size_string = size_to_string (attachment->size);

        /* FIXME: If GnomeIconList honoured "\n", the result would be a
                   lot better.  */
        label = g_strconcat (attachment->description, "\n(",
                     size_string, ")", NULL);

        gnome_icon_list_append (icon_list, icon_name, label);

        g_free (label);
        g_free (size_string);
    }

    gnome_icon_list_thaw (icon_list);
}

static void
remove_selected (EMsgComposerAttachmentBar *bar)
{
    GnomeIconList *icon_list;
    EMsgComposerAttachment *attachment;
    GList *attachment_list;
    GList *p;
    gint num;

    icon_list = GNOME_ICON_LIST (bar);

    /* Weee!  I am especially proud of this piece of cheesy code: it is
           truly awful.  But unless one attaches a huge number of files, it
           will not be as greedy as intended.  FIXME of course.  */

    attachment_list = NULL;
    for (p = icon_list->selection; p != NULL; p = p->next) {
        num = GPOINTER_TO_INT (p->data);
        attachment = E_MSG_COMPOSER_ATTACHMENT
            (g_list_nth (bar->priv->attachments, num)->data);
        attachment_list = g_list_prepend (attachment_list, attachment);
    }

    for (p = attachment_list; p != NULL; p = p->next)
        remove_attachment (bar, E_MSG_COMPOSER_ATTACHMENT (p->data));

    g_list_free (attachment_list);

    update (bar);
}

static void
edit_selected (EMsgComposerAttachmentBar *bar)
{
    GnomeIconList *icon_list;
    EMsgComposerAttachment *attachment;
    gint num;

    icon_list = GNOME_ICON_LIST (bar);

    num = GPOINTER_TO_INT (icon_list->selection->data);
    attachment = g_list_nth (bar->priv->attachments, num)->data;

    e_msg_composer_attachment_edit (attachment, GTK_WIDGET (bar));
}


/* "Attach" dialog.  */

static void
attach_cb (GtkWidget *widget,
       gpointer data)
{
    EMsgComposerAttachmentBar *bar;
    GtkWidget *file_selection;
    const gchar *file_name;

    file_selection = gtk_widget_get_toplevel (widget);
    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (data);

    file_name = gtk_file_selection_get_filename
                                  (GTK_FILE_SELECTION (file_selection));
    add_from_file (bar, file_name);

    gtk_widget_hide (file_selection);
}

static void
add_from_user (EMsgComposerAttachmentBar *bar)
{
    GtkWidget *file_selection;
    GtkWidget *cancel_button;
    GtkWidget *ok_button;

    file_selection = gtk_file_selection_new (_("Add attachment"));
    gtk_window_set_position (GTK_WINDOW (file_selection),
                 GTK_WIN_POS_MOUSE);

    ok_button = GTK_FILE_SELECTION (file_selection)->ok_button;
    gtk_signal_connect (GTK_OBJECT (ok_button),
                "clicked", GTK_SIGNAL_FUNC (attach_cb), bar);

    cancel_button = GTK_FILE_SELECTION (file_selection)->cancel_button;
    gtk_signal_connect_object (GTK_OBJECT (cancel_button),
                   "clicked",
                   GTK_SIGNAL_FUNC (gtk_widget_hide),
                   GTK_OBJECT (file_selection));

    gtk_widget_show (GTK_WIDGET (file_selection));
}


/* Callbacks.  */

static void
add_cb (GtkWidget *widget,
    gpointer data)
{
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (data));

    add_from_user (E_MSG_COMPOSER_ATTACHMENT_BAR (data));
}

static void
properties_cb (GtkWidget *widget,
           gpointer data)
{
    EMsgComposerAttachmentBar *bar;

    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (data));

    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (data);
    edit_selected (data);
}

static void
remove_cb (GtkWidget *widget,
       gpointer data)
{
    EMsgComposerAttachmentBar *bar;

    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (data));

    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (data);
    remove_selected (bar);
}


/* Popup menu handling.  */

static GnomeUIInfo icon_context_menu_info[] = {
    GNOMEUIINFO_ITEM (N_("Remove"),
              N_("Remove selected items from the attachment list"),
              remove_cb, NULL),
    GNOMEUIINFO_MENU_PROPERTIES_ITEM (properties_cb, NULL),
    GNOMEUIINFO_END
};

static GtkWidget *
get_icon_context_menu (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;

    priv = bar->priv;
    if (priv->icon_context_menu == NULL)
        priv->icon_context_menu = gnome_popup_menu_new
                               (icon_context_menu_info);

    return priv->icon_context_menu;
}

static void
popup_icon_context_menu (EMsgComposerAttachmentBar *bar,
             gint num,
             GdkEventButton *event)
{
    GtkWidget *menu;

    menu = get_icon_context_menu (bar);
    gnome_popup_menu_do_popup (menu, NULL, NULL, event, bar);
}

static GnomeUIInfo context_menu_info[] = {
    GNOMEUIINFO_ITEM (N_("Add attachment..."),
              N_("Attach a file to the message"),
              add_cb, NULL),
    GNOMEUIINFO_END
};

static GtkWidget *
get_context_menu (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;

    priv = bar->priv;
    if (priv->context_menu == NULL)
        priv->context_menu = gnome_popup_menu_new (context_menu_info);

    return priv->context_menu;
}

static void
popup_context_menu (EMsgComposerAttachmentBar *bar,
            GdkEventButton *event)
{
    GtkWidget *menu;

    menu = get_context_menu (bar);
    gnome_popup_menu_do_popup (menu, NULL, NULL, event, bar);
}


/* GtkObject methods.  */

static void
destroy (GtkObject *object)
{
    EMsgComposerAttachmentBar *bar;

    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (object);

    free_attachment_list (bar);

    if (GTK_OBJECT_CLASS (parent_class)->destroy != NULL)
        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


/* GtkWidget methods.  */

static gint
button_press_event (GtkWidget *widget,
            GdkEventButton *event)
{
    EMsgComposerAttachmentBar *bar;
    GnomeIconList *icon_list;
    gint icon_number;

    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (widget);
    icon_list = GNOME_ICON_LIST (widget);

    if (event->button != 3)
        return GTK_WIDGET_CLASS (parent_class)->button_press_event
                                    (widget, event);

    icon_number = gnome_icon_list_get_icon_at (icon_list,
                           event->x, event->y);

    if (icon_number >= 0) {
        gnome_icon_list_select_icon (icon_list, icon_number);
        popup_icon_context_menu (bar, icon_number, event);
    } else {
        popup_context_menu (bar, event);
    }

    return TRUE;
}


/* GnomeIconList methods.  */

static gboolean
text_changed (GnomeIconList *gil,
          gint num,
          const gchar *new_text)
{
    EMsgComposerAttachmentBar *bar;
    EMsgComposerAttachment *attachment;
    GList *p;

    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (gil);
    p = g_list_nth (bar->priv->attachments, num);
    attachment =  p->data;

    g_free (attachment->description);
    attachment->description = g_strdup (new_text);

    return TRUE;
}


/* Initialization.  */

static void
class_init (EMsgComposerAttachmentBarClass *class)
{
    GtkObjectClass *object_class;
    GtkWidgetClass *widget_class;
    GnomeIconListClass *icon_list_class;

    object_class = GTK_OBJECT_CLASS (class);
    widget_class = GTK_WIDGET_CLASS (class);
    icon_list_class = GNOME_ICON_LIST_CLASS (class);

    parent_class = gtk_type_class (gnome_icon_list_get_type ());

    object_class->destroy = destroy;

    widget_class->button_press_event = button_press_event;

    icon_list_class->text_changed = text_changed;

    /* Setup signals.  */

    signals[CHANGED] =
        gtk_signal_new ("changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (EMsgComposerAttachmentBarClass,
                           changed),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
}

static void
init (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    guint icon_size;

    priv = g_new (EMsgComposerAttachmentBarPrivate, 1);

    priv->attachments = NULL;
    priv->context_menu = NULL;
    priv->icon_context_menu = NULL;

    priv->num_attachments = 0;

    bar->priv = priv;

    /* FIXME partly hardcoded.  We should compute height from the font, and
           allow at least 2 lines for every item.  */
    icon_size = ICON_WIDTH + ICON_SPACING + ICON_BORDER + ICON_TEXT_SPACING;
    icon_size += 24;

    gtk_widget_set_usize (GTK_WIDGET (bar), icon_size * 4, icon_size);
}


GtkType
e_msg_composer_attachment_bar_get_type (void)
{
    static GtkType type = 0;

    if (type == 0) {
        static const GtkTypeInfo info = {
            "EMsgComposerAttachmentBar",
            sizeof (EMsgComposerAttachmentBar),
            sizeof (EMsgComposerAttachmentBarClass),
            (GtkClassInitFunc) class_init,
            (GtkObjectInitFunc) init,
            /* reserved_1 */ NULL,
            /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };

        type = gtk_type_unique (gnome_icon_list_get_type (), &info);
    }

    return type;
}

GtkWidget *
e_msg_composer_attachment_bar_new (GtkAdjustment *adj)
{
    EMsgComposerAttachmentBar *new;
    GnomeIconList *icon_list;

    gtk_widget_push_visual (gdk_imlib_get_visual ());
    gtk_widget_push_colormap (gdk_imlib_get_colormap ());
    new = gtk_type_new (e_msg_composer_attachment_bar_get_type ());
    gtk_widget_pop_visual ();
    gtk_widget_pop_colormap ();

    icon_list = GNOME_ICON_LIST (new);

    gnome_icon_list_construct (icon_list, ICON_WIDTH, adj, 0);

    gnome_icon_list_set_separators (icon_list, ICON_SEPARATORS);
    gnome_icon_list_set_row_spacing (icon_list, ICON_ROW_SPACING);
    gnome_icon_list_set_col_spacing (icon_list, ICON_COL_SPACING);
    gnome_icon_list_set_icon_border (icon_list, ICON_BORDER);
    gnome_icon_list_set_text_spacing (icon_list, ICON_TEXT_SPACING);
    gnome_icon_list_set_selection_mode (icon_list, GTK_SELECTION_MULTIPLE);

    return GTK_WIDGET (new);
}


static void
attach_to_multipart (CamelMultipart *multipart,
             EMsgComposerAttachment *attachment)
{
    CamelMimeBodyPart *part;
    CamelDataWrapper *content;
    CamelStream *stream;
    char *filename;

    part = camel_mime_body_part_new ();
    camel_mime_part_set_disposition (CAMEL_MIME_PART (part), "attachment");
    filename = g_basename (attachment->file_name);
    camel_mime_part_set_filename (CAMEL_MIME_PART (part), filename);
    g_free (filename);
    camel_mime_part_set_description (CAMEL_MIME_PART (part),
                     attachment->description);
    camel_mime_part_set_content_type (CAMEL_MIME_PART (part),
                      attachment->mime_type);

    content = CAMEL_DATA_WRAPPER (gtk_object_new (CAMEL_SIMPLE_DATA_WRAPPER_TYPE,
                              NULL));
    camel_data_wrapper_set_mime_type (content, attachment->mime_type);
    stream = camel_stream_fs_new_with_name (attachment->file_name, O_RDONLY, 0);
    camel_data_wrapper_construct_from_stream (content, stream);
    camel_stream_close (stream);
    camel_medium_set_content_object (CAMEL_MEDIUM (part), content);

    /* TODO: could possibly select an appropriate encoder based on the content */
    camel_mime_part_set_encoding((CamelMimePart *)part, CAMEL_MIME_PART_ENCODING_BASE64);

    camel_multipart_add_part (multipart, part);
}

void
e_msg_composer_attachment_bar_to_multipart (EMsgComposerAttachmentBar *bar,
                        CamelMultipart *multipart)
{
    EMsgComposerAttachmentBarPrivate *priv;
    GList *p;

    g_return_if_fail (bar != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));
    g_return_if_fail (multipart != NULL);
    g_return_if_fail (CAMEL_IS_MULTIPART (multipart));

    priv = bar->priv;

    for (p = priv->attachments; p != NULL; p = p->next) {
        EMsgComposerAttachment *attachment;

        attachment = E_MSG_COMPOSER_ATTACHMENT (p->data);
        attach_to_multipart (multipart, attachment);
    }
}


guint
e_msg_composer_attachment_bar_get_num_attachments (EMsgComposerAttachmentBar *bar)
{
    g_return_val_if_fail (bar != NULL, 0);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar), 0);

    return bar->priv->num_attachments;
}


void
e_msg_composer_attachment_bar_attach (EMsgComposerAttachmentBar *bar,
                      const gchar *file_name)
{
    g_return_if_fail (bar != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));

    if (file_name == NULL)
        add_from_user (bar);
    else
        add_from_file (bar, file_name);
}