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 <config.h>
#include <gnome.h>
#include <glade/glade.h>
#include <libgnomevfs/gnome-vfs-mime-info.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk-pixbuf/gdk-pixbuf-loader.h>
#include <gdk-pixbuf/gnome-canvas-pixbuf.h>

#include "e-msg-composer.h"
#include "e-msg-composer-select-file.h"
#include "e-msg-composer-attachment.h"
#include "e-msg-composer-attachment-bar.h"

#include "e-icon-list.h"

#include "camel/camel-data-wrapper.h"
#include "camel/camel-stream-fs.h"
#include "camel/camel-stream-mem.h"
#include "camel/camel-mime-part.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 EIconListClass *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;
}

/* 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_common (EMsgComposerAttachmentBar *bar,
        EMsgComposerAttachment *attachment)
{
    g_return_if_fail (attachment != NULL);

    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++;

    update (bar);

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

static void
add_from_mime_part (EMsgComposerAttachmentBar *bar,
            CamelMimePart *part)
{
    add_common (bar, e_msg_composer_attachment_new_from_mime_part (part));
}

static void
add_from_file (EMsgComposerAttachmentBar *bar,
           const gchar *file_name)
{
    add_common (bar, e_msg_composer_attachment_new (file_name));
}

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 GdkPixbuf *
pixbuf_for_mime_type (const char *mime_type)
{
    const char *icon_name;
    char *filename = NULL;
    GdkPixbuf *pixbuf;

    icon_name = gnome_vfs_mime_get_value (mime_type, "icon-filename");
    if (icon_name) {
        if (*icon_name == '/') {
            pixbuf = gdk_pixbuf_new_from_file (icon_name);
            if (pixbuf)
                return pixbuf;
        }
        
        filename = gnome_pixmap_file (icon_name);
        if (!filename) {
            char *fm_icon;
            
            fm_icon = g_strdup_printf ("nautilus/%s", icon_name);
            filename = gnome_pixmap_file (fm_icon);
            if (!filename) {
                fm_icon = g_strdup_printf ("mc/%s", icon_name);
                filename = gnome_pixmap_file (fm_icon);
            }
            g_free (fm_icon);
        }
    }
    
    if (!filename)
        filename = gnome_pixmap_file ("gnome-unknown.png");
    
    pixbuf = gdk_pixbuf_new_from_file (filename);
    g_free (filename);
    
    return pixbuf;
}

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

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

    e_icon_list_freeze (icon_list);

    e_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 *desc;
        gchar *size_string, *label;
        CamelContentType *content_type;
        GdkPixbuf *pixbuf;
        gboolean image;
        
        attachment = p->data;
        content_type = camel_mime_part_get_content_type (attachment->body);
        /* Get the image out of the attachment 
           and create a thumbnail for it */
        image = header_content_type_is (content_type, "image", "*");
        
        if (image && attachment->pixbuf_cache == NULL) {
            CamelDataWrapper *wrapper;
            CamelStream *mstream;
            GdkPixbufLoader *loader;
            gboolean error = TRUE;
            char tmp[4096];
            int t;

            wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (attachment->body));
            mstream = camel_stream_mem_new ();

            camel_data_wrapper_write_to_stream (wrapper, mstream);

            camel_stream_reset (mstream);

            /* Stream image into pixbuf loader */
            loader = gdk_pixbuf_loader_new ();
            do {
                t = camel_stream_read (mstream, tmp, 4096);
                if (t > 0) {
                    error = !gdk_pixbuf_loader_write (loader,
                                      tmp, t);
                    if (error) {
                        break;
                    }
                } else {
                    if (camel_stream_eos (mstream))
                        break;
                    error = TRUE;
                    break;
                }
                
            } while (!camel_stream_eos (mstream));

            if (!error) {
                int ratio, width, height;
                
                /* Shrink pixbuf */
                pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
                width = gdk_pixbuf_get_width (pixbuf);
                height = gdk_pixbuf_get_height (pixbuf);
                if (width >= height) {
                    if (width > 48) {
                        ratio = width / 48;
                        width = 48;
                        height = height / ratio;
                    }
                } else {
                    if (height > 48) {
                        ratio = height / 48;
                        height = 48;
                        width = width / ratio;
                    }
                }
                
                attachment->pixbuf_cache = gdk_pixbuf_scale_simple 
                    (pixbuf,
                     width,
                     height,
                     GDK_INTERP_BILINEAR);
            } else {
                g_warning ("GdkPixbufLoader Error");
                image = FALSE;
            }

            /* Destroy everything */
            gdk_pixbuf_loader_close (loader);
            gtk_object_destroy (GTK_OBJECT (loader));
            camel_stream_close (mstream);
        }
        
        desc = camel_mime_part_get_description (attachment->body);
        if (!desc || *desc == '\0')
            desc = camel_mime_part_get_filename (attachment->body);
        if (!desc)
            desc = _("attachment");
        
        if (attachment->size) {
            size_string = size_to_string (attachment->size);
            label = g_strdup_printf ("%s (%s)", desc, size_string);
            g_free (size_string);
        } else
            label = g_strdup (desc);

        if (image) {
            e_icon_list_append_pixbuf (icon_list, attachment->pixbuf_cache, NULL, label);
        } else {
            char *mime_type;

            mime_type = header_content_type_simple (content_type);
            pixbuf = pixbuf_for_mime_type (mime_type);
            g_free (mime_type);
            e_icon_list_append_pixbuf (icon_list, pixbuf, 
                           NULL, label);
            if (pixbuf)
                gdk_pixbuf_unref (pixbuf);
        }

        g_free (label);
    }

    e_icon_list_thaw (icon_list);
}

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

    icon_list = E_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;
    p = e_icon_list_get_selection (icon_list);
    for (; 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)
{
    EIconList *icon_list;
    EMsgComposerAttachment *attachment;
    GList *selection;
    gint num;

    icon_list = E_ICON_LIST (bar);

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

    e_msg_composer_attachment_edit (attachment, GTK_WIDGET (bar));
}


/* "Attach" dialog.  */

static void
add_from_user (EMsgComposerAttachmentBar *bar)
{
    EMsgComposer *composer;
    char *file_name;
    
    composer = E_MSG_COMPOSER (gtk_widget_get_toplevel (GTK_WIDGET (bar)));
    
    file_name = e_msg_composer_select_file (composer, _("Attach a file"));
    
    add_from_file (bar, file_name);
    
    g_free (file_name);
}


/* 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;
    EIconList *icon_list;
    gint icon_number;

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

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

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

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

    return TRUE;
}


/* Initialization.  */

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

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

    parent_class = gtk_type_class (e_icon_list_get_type ());

    object_class->destroy = destroy;

    widget_class->button_press_event = button_press_event;

    /* 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, icon_height;
    GdkFont *font;

    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;

    font = GTK_WIDGET (bar)->style->font;
    icon_height = icon_size + ((font->ascent + font->descent) * 2);
    icon_size += 24;
    
    gtk_widget_set_usize (GTK_WIDGET (bar), icon_size * 4, icon_height);
}


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 (e_icon_list_get_type (), &info);
    }

    return type;
}

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

    gdk_rgb_init ();
    gtk_widget_push_visual (gdk_rgb_get_visual ());
    gtk_widget_push_colormap (gdk_rgb_get_cmap ());
    new = gtk_type_new (e_msg_composer_attachment_bar_get_type ());
    gtk_widget_pop_visual ();
    gtk_widget_pop_colormap ();

    icon_list = E_ICON_LIST (new);

    e_icon_list_construct (icon_list, ICON_WIDTH, 0);

    e_icon_list_set_separators (icon_list, ICON_SEPARATORS);
    e_icon_list_set_row_spacing (icon_list, ICON_ROW_SPACING);
    e_icon_list_set_col_spacing (icon_list, ICON_COL_SPACING);
    e_icon_list_set_icon_border (icon_list, ICON_BORDER);
    e_icon_list_set_text_spacing (icon_list, ICON_TEXT_SPACING);
    e_icon_list_set_selection_mode (icon_list, GTK_SELECTION_MULTIPLE);

    return GTK_WIDGET (new);
}

/* FIXME: is_8bit() and best_encoding() should really be shared
   between e-msg-composer.c and this file. */
static gboolean
is_8bit (const guchar *text)
{
    guchar *c;
    
    for (c = (guchar *) text; *c; c++)
        if (*c > (guchar) 127)
            return TRUE;
    
    return FALSE;
}

static int
best_encoding (const guchar *text)
{
    guchar *ch;
    int count = 0;
    int total;
    
    for (ch = (guchar *) text; *ch; ch++)
        if (*ch > (guchar) 127)
            count++;
    
    total = (int) (ch - text);
    
    if ((float) count <= total * 0.17)
        return CAMEL_MIME_PART_ENCODING_QUOTEDPRINTABLE;
    else
        return CAMEL_MIME_PART_ENCODING_BASE64;
}

static void
attach_to_multipart (CamelMultipart *multipart,
             EMsgComposerAttachment *attachment)
{
    CamelContentType *content_type;
    
    content_type = camel_mime_part_get_content_type (attachment->body);
    
    if (!header_content_type_is (content_type, "multipart", "*")) {
        if (header_content_type_is (content_type, "text", "*")) {
            CamelStream *stream;
            GByteArray *array;
            guchar *text;
            
            array = g_byte_array_new ();
            stream = camel_stream_mem_new_with_byte_array (array);
            camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (attachment->body), stream);
            g_byte_array_append (array, "", 1);
            text = array->data;
            
            if (is_8bit (text))
                camel_mime_part_set_encoding (attachment->body, best_encoding (text));
            else
                camel_mime_part_set_encoding (attachment->body, CAMEL_MIME_PART_ENCODING_7BIT);
            
            camel_object_unref (CAMEL_OBJECT (stream));
        } else if (!header_content_type_is (content_type, "message", "*")) {
            camel_mime_part_set_encoding (attachment->body,
                              CAMEL_MIME_PART_ENCODING_BASE64);
        }
    }
    
    camel_multipart_add_part (multipart, attachment->body);
}

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 (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));

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

void
e_msg_composer_attachment_bar_attach_mime_part (EMsgComposerAttachmentBar *bar,
                        CamelMimePart *part)
{
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));

    add_from_mime_part (bar, part);
}