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

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-msg-composer.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
 */

/*

   TODO

   - Somehow users should be able to see if any file(s) are attached even when
     the attachment bar is not shown.

*/

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

#include <bonobo.h>
#include <bonobo/bonobo-stream-memory.h>
#include <glade/glade.h>
#include <gnome.h>
#include <libgnorba/gnorba.h>

#include <camel/camel.h>

#include "e-util/e-html-utils.h"
#include "e-util/e-setup.h"
#include "widgets/misc/e-scroll-frame.h"

#include "e-msg-composer.h"
#include "e-msg-composer-address-dialog.h"
#include "e-msg-composer-attachment-bar.h"
#include "e-msg-composer-hdrs.h"

#ifdef USING_OAF
#define HTML_EDITOR_CONTROL_ID "OAFIID:control:html-editor:63c5499b-8b0c-475a-9948-81ec96a9662c"
#else
#define HTML_EDITOR_CONTROL_ID "control:html-editor"
#endif


#define DEFAULT_WIDTH 600
#define DEFAULT_HEIGHT 500

enum {
    SEND,
    POSTPONE,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

static GnomeAppClass *parent_class = NULL;

static GtkWidget *
create_editor (EMsgComposer *composer)
{
    GtkWidget *control;

    control = bonobo_widget_new_control (HTML_EDITOR_CONTROL_ID,
                         bonobo_object_corba_objref (BONOBO_OBJECT (composer->uih)));
    if (control == NULL) {
        g_error ("Cannot get `%s'.", HTML_EDITOR_CONTROL_ID);
        return NULL;
    }

    return control;
}

static void
free_string_list (GList *list)
{
    GList *p;

    if (list == NULL)
        return;

    for (p = list; p != NULL; p = p->next)
        g_free (p->data);

    g_list_free (list);
}

static char *
get_editor_text (BonoboWidget *editor, char *format)
{
    Bonobo_PersistStream persist;
    BonoboStream *stream;
    BonoboStreamMem *stream_mem;
    CORBA_Environment ev;
    char *text;

    CORBA_exception_init (&ev);
    persist = (Bonobo_PersistStream)
        bonobo_object_client_query_interface (
            bonobo_widget_get_server (editor),
            "IDL:Bonobo/PersistStream:1.0",
            &ev);
    g_assert (persist != CORBA_OBJECT_NIL);

    stream = bonobo_stream_mem_create (NULL, 0, FALSE, TRUE);
    Bonobo_PersistStream_save (persist, (Bonobo_Stream)bonobo_object_corba_objref (BONOBO_OBJECT (stream)), format, &ev);
    if (ev._major != CORBA_NO_EXCEPTION) {
        /* FIXME. Some error message. */
        return NULL;
    }
    
    if (ev._major != CORBA_SYSTEM_EXCEPTION)
        CORBA_Object_release (persist, &ev);

    Bonobo_Unknown_unref (persist, &ev);
    CORBA_exception_free (&ev);

    stream_mem = BONOBO_STREAM_MEM (stream);
    text = g_malloc (stream_mem->pos + 1);
    memcpy (text, stream_mem->buffer, stream_mem->pos);
    text[stream_mem->pos] = 0;
    bonobo_object_unref (BONOBO_OBJECT(stream));
    return text;
}

#define LINE_LEN 72

/* This might be a temporary function... the GtkHTML export interfaces are
 * not yet complete, so some or all of this may move into GtkHTML.
 */
static char *
format_text (char *text)
{
    GString *out;
    char *s, *space, *outstr;
    int len, tabbing, i;
    gboolean linestart = TRUE, cited = FALSE;

    len = strlen (text);
    out = g_string_sized_new (len + len / LINE_LEN);

    s = text;
    while (*s) {
        if (linestart) {
            tabbing = 0;
            while (*s == '\t') {
                s++;
                tabbing++;
            }
            cited = (tabbing == 0 && *s == '>');
        }

        len = strcspn (s, "\n");
        if (!cited && len > LINE_LEN - tabbing * 8) {
            /* If we can break anywhere between s and
             * s + LINE_LEN, do that. We can break between
             * space and anything but &nbsp;
             */
            space = s + LINE_LEN - tabbing * 8;
            while (space > s && (*space != ' '
                         || (*(space + 1) == '\240')
                         || (*(space - 1) == '\240')))
                space--;

            if (space != s)
                len = space - s;
        }

        /* Do initial tabs */
        for (i = 0; i < tabbing; i++)
            g_string_append_c (out, '\t');

        /* Copy the line... */
        while (len--) {
            g_string_append_c (out, *s == '\240' ? ' ' : *s);
            s++;
        }

        /* Eat whitespace... */
        while (*s == ' ' || *s == '\240')
            s++;
        if (*s == '\n') {
            s++;
            linestart = TRUE;
        } else
            linestart = FALSE;

        /* And end the line. */
        g_string_append_c (out, '\n');
    }

    outstr = out->str;
    g_string_free (out, FALSE);
    return outstr;
}

typedef enum {
    MSG_FORMAT_PLAIN,
    MSG_FORMAT_ALTERNATIVE,
} MsgFormat;

/* This functions builds a CamelMimeMessage for the message that the user has
   composed in `composer'.  */
static CamelMimeMessage *
build_message (EMsgComposer *composer)
{
    EMsgComposerAttachmentBar *attachment_bar =
        E_MSG_COMPOSER_ATTACHMENT_BAR (composer->attachment_bar);
    CamelMimeMessage *new;
    CamelMultipart *body = NULL;
    CamelMimePart *part;
    char *html = NULL, *plain = NULL, *fmt = NULL;
    int i;
    char *string;
    MsgFormat type = MSG_FORMAT_ALTERNATIVE;
    char *path;

    path = g_strdup_printf ("=%s/config=/mail/msg_format", evolution_dir);
    string = gnome_config_get_string (path);
    g_free (path);
    if (string) {
        if (!strcasecmp(string, "plain"))
            type = MSG_FORMAT_PLAIN;
    }

    new = camel_mime_message_new ();

    e_msg_composer_hdrs_to_message (E_MSG_COMPOSER_HDRS (composer->hdrs), new);
    for (i = 0; i < composer->extra_hdr_names->len; i++) {
        camel_medium_add_header (CAMEL_MEDIUM (new),
                     composer->extra_hdr_names->pdata[i],
                     composer->extra_hdr_values->pdata[i]);
    }
    
    plain = get_editor_text (BONOBO_WIDGET (composer->editor), "text/plain");
    fmt = format_text (plain);
    g_free (plain);
    
    if (type != MSG_FORMAT_PLAIN) {
        html = get_editor_text (BONOBO_WIDGET (composer->editor), "text/html");
    }

    if (type == MSG_FORMAT_ALTERNATIVE) {
        body = camel_multipart_new ();
        camel_data_wrapper_set_mime_type (CAMEL_DATA_WRAPPER (body),
                          "multipart/alternative");
        camel_multipart_set_boundary (body, NULL);

        part = camel_mime_part_new ();
        camel_mime_part_set_content (part, fmt, strlen (fmt), "text/plain");
        g_free (fmt);
        camel_multipart_add_part (body, part);
        gtk_object_unref (GTK_OBJECT (part));
        
        part = camel_mime_part_new ();
        camel_mime_part_set_content (part, html, strlen (html), "text/html");
        g_free (html);
        camel_multipart_add_part (body, part);
        gtk_object_unref (GTK_OBJECT (part));
    }

    if (e_msg_composer_attachment_bar_get_num_attachments (attachment_bar)) {
        CamelMultipart *multipart = camel_multipart_new ();

        /* Generate a random boundary. */
        camel_multipart_set_boundary (multipart, NULL);

        part = camel_mime_part_new ();
        switch (type) {
        case MSG_FORMAT_ALTERNATIVE:
            camel_medium_set_content_object (CAMEL_MEDIUM (part),
                             CAMEL_DATA_WRAPPER (body));
            gtk_object_unref (GTK_OBJECT (body));
            break;
        case MSG_FORMAT_PLAIN:
            camel_mime_part_set_content (part, fmt, strlen (fmt), "text/plain");
            g_free(fmt);
            break;
        }
        camel_multipart_add_part (multipart, part);
        gtk_object_unref (GTK_OBJECT (part));

        e_msg_composer_attachment_bar_to_multipart (attachment_bar, multipart);

        camel_medium_set_content_object (CAMEL_MEDIUM (new), CAMEL_DATA_WRAPPER (multipart));
        gtk_object_unref (GTK_OBJECT (multipart));
    } else {
        CamelDataWrapper *cdw;
        CamelStream *stream;
        switch (type) {
        case MSG_FORMAT_ALTERNATIVE:
            camel_medium_set_content_object (CAMEL_MEDIUM (new), CAMEL_DATA_WRAPPER (body));
            gtk_object_unref (GTK_OBJECT (body));
            break;
        case MSG_FORMAT_PLAIN:
            stream = camel_stream_mem_new_with_buffer (fmt, strlen (fmt));
            cdw = camel_data_wrapper_new ();
            camel_data_wrapper_construct_from_stream (cdw, stream);
            gtk_object_unref (GTK_OBJECT (stream));
            
            camel_data_wrapper_set_mime_type (cdw, "text/plain");

            camel_medium_set_content_object (CAMEL_MEDIUM (new), CAMEL_DATA_WRAPPER (cdw));
            gtk_object_unref (GTK_OBJECT (cdw));
            g_free (fmt);
            break;

        }
    }

    return new;
}

static char *
get_signature ()
{
    char *path, *sigfile, *rawsig;
    static char *htmlsig = NULL;
    static time_t sigmodtime = -1;
    struct stat st;
    int fd;

    path = g_strdup_printf ("=%s/config=/mail/id_sig", evolution_dir);
    sigfile = gnome_config_get_string (path);
    g_free (path);
    if (!sigfile || !*sigfile) {
        return NULL;
    }

    if (stat (sigfile, &st) == -1) {
        char *msg;

        msg = g_strdup_printf ("Could not open signature file %s:\n%s",
                       sigfile, g_strerror (errno));
        gnome_error_dialog (msg);
        g_free (msg);

        return NULL;
    }

    if (st.st_mtime == sigmodtime)
        return htmlsig;

    rawsig = g_malloc (st.st_size + 1);
    fd = open (sigfile, O_RDONLY);
    if (fd == -1) {
        char *msg;

        msg = g_strdup_printf ("Could not open signature file %s:\n%s",
                       sigfile, g_strerror (errno));
        gnome_error_dialog (msg);
        g_free (msg);

        return NULL;
    }

    read (fd, rawsig, st.st_size);
    rawsig[st.st_size] = '\0';
    close (fd);

    htmlsig = e_text_to_html (rawsig, 0);
    sigmodtime = st.st_mtime;

    return htmlsig;
}

static void
set_editor_text (BonoboWidget *editor, const char *text)
{
    Bonobo_PersistStream persist;
    BonoboStream *stream;
    CORBA_Environment ev;
    char *sig, *fulltext;

    sig = get_signature ();
    if (sig) {
        fulltext = g_strdup_printf ("%s<BR>\n<PRE>\n--\n%s<PRE>",
                        text, sig);
    } else
        fulltext = (char*)text;

    CORBA_exception_init (&ev);
    persist = (Bonobo_PersistStream)
        bonobo_object_client_query_interface (
            bonobo_widget_get_server (editor),
            "IDL:Bonobo/PersistStream:1.0",
            &ev);
    g_assert (persist != CORBA_OBJECT_NIL);

    stream = bonobo_stream_mem_create (fulltext, strlen (fulltext),
                       TRUE, FALSE);
    if (sig)
        g_free (fulltext);
    Bonobo_PersistStream_load (persist, (Bonobo_Stream)bonobo_object_corba_objref (BONOBO_OBJECT (stream)), "text/html", &ev);
    if (ev._major != CORBA_NO_EXCEPTION) {
        /* FIXME. Some error message. */
        return;
    }
    if (ev._major != CORBA_SYSTEM_EXCEPTION)
        CORBA_Object_release (persist, &ev);

    Bonobo_Unknown_unref (persist, &ev);
    CORBA_exception_free (&ev);
    bonobo_object_unref (BONOBO_OBJECT(stream));
}


static void
show_attachments (EMsgComposer *composer,
          gboolean show)
{
    if (show) {
        gtk_widget_show (composer->attachment_scroll_frame);
        gtk_widget_show (composer->attachment_bar);
    } else {
        gtk_widget_hide (composer->attachment_scroll_frame);
        gtk_widget_hide (composer->attachment_bar);
    }

    composer->attachment_bar_visible = show;

    /* Update the GUI.  */

#if 0
    gtk_check_menu_item_set_active
        (GTK_CHECK_MENU_ITEM
         (glade_xml_get_widget (composer->menubar_gui,
                    "menu_view_attachments")),
         show);
#endif

    /* XXX we should update the toggle toolbar item as well.  At
       this point, it is not a toggle because Glade is broken.  */
}


/* Address dialog callbacks.  */

static void
address_dialog_destroy_cb (GtkWidget *widget,
               gpointer data)
{
    EMsgComposer *composer;

    composer = E_MSG_COMPOSER (data);
    composer->address_dialog = NULL;
}

static void
address_dialog_apply_cb (EMsgComposerAddressDialog *dialog,
             gpointer data)
{
    EMsgComposerHdrs *hdrs;
    GList *list;

    hdrs = E_MSG_COMPOSER_HDRS (E_MSG_COMPOSER (data)->hdrs);

    list = e_msg_composer_address_dialog_get_to_list (dialog);
    e_msg_composer_hdrs_set_to (hdrs, list);

    list = e_msg_composer_address_dialog_get_cc_list (dialog);
    e_msg_composer_hdrs_set_cc (hdrs, list);

    list = e_msg_composer_address_dialog_get_bcc_list (dialog);
    e_msg_composer_hdrs_set_bcc (hdrs, list);
}


/* Message composer window callbacks.  */

static void
send_cb (GtkWidget *widget,
     gpointer data)
{
    gtk_signal_emit (GTK_OBJECT (data), signals[SEND]);
}

static void
exit_dialog_cb (int reply, gpointer data)
{
    if (reply == 0)
        gtk_widget_destroy (GTK_WIDGET (data));
}

static void
exit_cb (GtkWidget *widget, gpointer data)
{
    EMsgComposer *composer = E_MSG_COMPOSER (data);
    GtkWindow *parent =
        GTK_WINDOW (gtk_widget_get_ancestor (GTK_WIDGET (data),
                             GTK_TYPE_WINDOW));

    gnome_ok_cancel_dialog_parented (_("Discard this message?"),
                     exit_dialog_cb, composer, parent);
}
    

static void
menu_view_attachments_activate_cb (GtkWidget *widget,
                   gpointer data)
{
    e_msg_composer_show_attachments (E_MSG_COMPOSER (data),
                     GTK_CHECK_MENU_ITEM (widget)->active);
}

static void
toolbar_view_attachments_clicked_cb (GtkWidget *widget,
                      gpointer data)
{
    EMsgComposer *composer;

    composer = E_MSG_COMPOSER (data);

    e_msg_composer_show_attachments (composer,
                     ! composer->attachment_bar_visible);
}

static void
add_attachment_cb (GtkWidget *widget,
           gpointer data)
{
    EMsgComposer *composer;

    composer = E_MSG_COMPOSER (data);

    e_msg_composer_attachment_bar_attach
        (E_MSG_COMPOSER_ATTACHMENT_BAR (composer->attachment_bar),
         NULL);
}

/* Create the address dialog if not created already.  */
static void
setup_address_dialog (EMsgComposer *composer)
{
    EMsgComposerAddressDialog *dialog;
    EMsgComposerHdrs *hdrs;
    GList *list;

    if (composer->address_dialog != NULL)
        return;

    composer->address_dialog = e_msg_composer_address_dialog_new ();
    dialog = E_MSG_COMPOSER_ADDRESS_DIALOG (composer->address_dialog);
    hdrs = E_MSG_COMPOSER_HDRS (composer->hdrs);

    gtk_signal_connect (GTK_OBJECT (dialog),
                "destroy", address_dialog_destroy_cb, composer);
    gtk_signal_connect (GTK_OBJECT (dialog),
                "apply", address_dialog_apply_cb, composer);

    list = e_msg_composer_hdrs_get_to (hdrs);
    e_msg_composer_address_dialog_set_to_list (dialog, list);

    list = e_msg_composer_hdrs_get_cc (hdrs);
    e_msg_composer_address_dialog_set_cc_list (dialog, list);

    list = e_msg_composer_hdrs_get_bcc (hdrs);
    e_msg_composer_address_dialog_set_bcc_list (dialog, list);
}

static void
address_dialog_cb (GtkWidget *widget,
           gpointer data)
{
    EMsgComposer *composer;

    /* FIXME maybe we should hide the dialog on Cancel/OK instead of
           destroying it.  */

    composer = E_MSG_COMPOSER (data);

    setup_address_dialog (composer);

    gtk_widget_show (composer->address_dialog);
    gdk_window_show (composer->address_dialog->window);
}

static void
attachment_bar_changed_cb (EMsgComposerAttachmentBar *bar,
               gpointer data)
{
    EMsgComposer *composer;
    
    composer = E_MSG_COMPOSER (data);

    if (e_msg_composer_attachment_bar_get_num_attachments (bar) > 0)
        e_msg_composer_show_attachments (composer, TRUE);
    else
        e_msg_composer_show_attachments (composer, FALSE);
}


/* Menu bar implementation.  */

static GnomeUIInfo file_tree[] = {
    GNOMEUIINFO_MENU_OPEN_ITEM (NULL, NULL),
    GNOMEUIINFO_MENU_SAVE_ITEM (NULL, NULL),
    GNOMEUIINFO_MENU_SAVE_AS_ITEM (NULL, NULL),
    GNOMEUIINFO_ITEM_NONE (N_("Save in _folder..."), N_("Save the message in a specified folder"),
                   NULL),
    GNOMEUIINFO_SEPARATOR,
    GNOMEUIINFO_ITEM_STOCK (N_("Send"), N_("Send the message"),
                send_cb, GNOME_STOCK_MENU_MAIL_SND),
    GNOMEUIINFO_SEPARATOR,
    GNOMEUIINFO_MENU_EXIT_ITEM (exit_cb, NULL),
    GNOMEUIINFO_END
};

static GnomeUIInfo view_tree[] = {
    GNOMEUIINFO_ITEM_STOCK (N_("View _attachments"), N_("View/hide attachments"),
                menu_view_attachments_activate_cb, GNOME_STOCK_MENU_ATTACH),
    GNOMEUIINFO_END
};

static GnomeUIInfo menubar_info[] = {
    GNOMEUIINFO_MENU_FILE_TREE (file_tree),
    GNOMEUIINFO_MENU_VIEW_TREE (view_tree),
    GNOMEUIINFO_END
};

static void
create_menubar (EMsgComposer *composer)
{
    BonoboUIHandler *uih;
    BonoboUIHandlerMenuItem *list;

    uih = composer->uih;

    bonobo_ui_handler_create_menubar (uih);

    list = bonobo_ui_handler_menu_parse_uiinfo_list_with_data (menubar_info, composer);
    bonobo_ui_handler_menu_add_list (uih, "/", list);
}


/* Toolbar implementation.  */

static GnomeUIInfo toolbar_info[] = {
    GNOMEUIINFO_ITEM_STOCK (N_("Send"), N_("Send this message"), send_cb, GNOME_STOCK_PIXMAP_MAIL_SND),
    GNOMEUIINFO_SEPARATOR,
    GNOMEUIINFO_ITEM_STOCK (N_("Cut"), N_("Cut selected region into the clipboard"), NULL, GNOME_STOCK_PIXMAP_CUT),
    GNOMEUIINFO_ITEM_STOCK (N_("Copy"), N_("Copy selected region into the clipboard"), NULL, GNOME_STOCK_PIXMAP_COPY),
    GNOMEUIINFO_ITEM_STOCK (N_("Paste"), N_("Paste selected region into the clipboard"), NULL, GNOME_STOCK_PIXMAP_PASTE),
    GNOMEUIINFO_ITEM_STOCK (N_("Undo"), N_("Undo last operation"), NULL, GNOME_STOCK_PIXMAP_UNDO),
    GNOMEUIINFO_SEPARATOR,
    GNOMEUIINFO_ITEM_STOCK (N_("Attach"), N_("Attach a file"), add_attachment_cb, GNOME_STOCK_PIXMAP_ATTACH),
    GNOMEUIINFO_END
};

static void
create_toolbar (EMsgComposer *composer)
{
    BonoboUIHandler *uih;
    BonoboUIHandlerToolbarItem *list;

    uih = composer->uih;

    bonobo_ui_handler_create_toolbar (uih, "Toolbar");

    list = bonobo_ui_handler_toolbar_parse_uiinfo_list_with_data (toolbar_info, composer);
    bonobo_ui_handler_toolbar_add_list (uih, "/Toolbar", list);
}


/* GtkObject methods.  */

static void
destroy (GtkObject *object)
{
    EMsgComposer *composer;

    composer = E_MSG_COMPOSER (object);

    bonobo_object_unref (BONOBO_OBJECT (composer->uih));

    /* FIXME?  I assume the Bonobo widget will get destroyed
           normally?  */

    if (composer->address_dialog != NULL)
        gtk_widget_destroy (composer->address_dialog);
    if (composer->hdrs != NULL)
        gtk_widget_destroy (composer->hdrs);

    if (composer->extra_hdr_names) {
        int i;

        for (i = 0; i < composer->extra_hdr_names->len; i++) {
            g_free (composer->extra_hdr_names->pdata[i]);
            g_free (composer->extra_hdr_values->pdata[i]);
        }
        g_ptr_array_free (composer->extra_hdr_names, TRUE);
        g_ptr_array_free (composer->extra_hdr_values, TRUE);
    }

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


static void
class_init (EMsgComposerClass *klass)
{
    GtkObjectClass *object_class;

    object_class = (GtkObjectClass *) klass;

    object_class->destroy = destroy;

    parent_class = gtk_type_class (gnome_app_get_type ());

    signals[SEND] =
        gtk_signal_new ("send",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (EMsgComposerClass, send),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    signals[POSTPONE] =
        gtk_signal_new ("postpone",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (EMsgComposerClass, postpone),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
}

static void
init (EMsgComposer *composer)
{
    composer->uih = NULL;

    composer->hdrs = NULL;
    composer->extra_hdr_names = g_ptr_array_new ();
    composer->extra_hdr_values = g_ptr_array_new ();

    composer->editor = NULL;

    composer->address_dialog = NULL;

    composer->attachment_bar = NULL;
    composer->attachment_scroll_frame = NULL;
}

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

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

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

    return type;
}


/**
 * e_msg_composer_construct:
 * @composer: A message composer widget
 * 
 * Construct @composer.
 **/
void
e_msg_composer_construct (EMsgComposer *composer)
{
    GtkWidget *vbox;

    g_return_if_fail (gtk_main_level () > 0);

    gtk_window_set_default_size (GTK_WINDOW (composer),
                     DEFAULT_WIDTH, DEFAULT_HEIGHT);

    gnome_app_construct (GNOME_APP (composer), "e-msg-composer",
                 "Compose a message");

    composer->uih = bonobo_ui_handler_new ();
    bonobo_ui_handler_set_app (composer->uih, GNOME_APP (composer));

    vbox = gtk_vbox_new (FALSE, 0);

    composer->hdrs = e_msg_composer_hdrs_new ();
    gtk_box_pack_start (GTK_BOX (vbox), composer->hdrs, FALSE, TRUE, 0);
    gtk_widget_show (composer->hdrs);

    /* Editor component.  */

    create_menubar (composer);
    create_toolbar (composer);
    composer->editor = create_editor (composer);

    gtk_widget_show (composer->editor);
    gtk_box_pack_start (GTK_BOX (vbox), composer->editor, TRUE, TRUE, 0);
    gtk_widget_show (composer->editor);

    /* Attachment editor, wrapped into a GtkScrolledWindow.  We don't
           show it for now.  */

    composer->attachment_scroll_frame = e_scroll_frame_new (NULL, NULL);
    e_scroll_frame_set_policy (E_SCROLL_FRAME (composer->attachment_scroll_frame),
                   GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    composer->attachment_bar = e_msg_composer_attachment_bar_new (NULL);
    GTK_WIDGET_SET_FLAGS (composer->attachment_bar, GTK_CAN_FOCUS);
    gtk_container_add (GTK_CONTAINER (composer->attachment_scroll_frame),
               composer->attachment_bar);
    gtk_box_pack_start (GTK_BOX (vbox),
                composer->attachment_scroll_frame,
                FALSE, TRUE, GNOME_PAD_SMALL);

    gtk_signal_connect (GTK_OBJECT (composer->attachment_bar), "changed",
                GTK_SIGNAL_FUNC (attachment_bar_changed_cb), composer);

    gnome_app_set_contents (GNOME_APP (composer), vbox);
    gtk_widget_show (vbox);

    e_msg_composer_show_attachments (composer, FALSE);
}

/**
 * e_msg_composer_new:
 *
 * Create a new message composer widget.  This function must be called
 * within the GTK+ main loop, or it will fail.
 * 
 * Return value: A pointer to the newly created widget
 **/
GtkWidget *
e_msg_composer_new (void)
{
    GtkWidget *new;

    g_return_val_if_fail (gtk_main_level () > 0, NULL);
 
    new = gtk_type_new (e_msg_composer_get_type ());
    e_msg_composer_construct (E_MSG_COMPOSER (new));

    /* Load the signature, if any. */
    set_editor_text (BONOBO_WIDGET (E_MSG_COMPOSER (new)->editor), "");

    return new;
}


static GList *
add_recipients (GList *list, const char *recips, gboolean decode)
{
    int len;
    char *addr;

    while (*recips) {
        len = strcspn (recips, ",");
        if (len) {
            addr = g_strndup (recips, len);
            if (decode)
                camel_url_decode (addr);
            list = g_list_append (list, addr);
        }
        recips += len;
        if (*recips == ',')
            recips++;
    }

    return list;
}

static void
free_recipients (GList *list)
{
    GList *l;

    for (l = list; l; l = l->next)
        g_free (l->data);
    g_list_free (list);
}

/**
 * e_msg_composer_new_from_url:
 * @url: a mailto URL
 *
 * Create a new message composer widget, and fill in fields as
 * defined by the provided URL.
 **/
GtkWidget *
e_msg_composer_new_from_url (const char *url)
{
    EMsgComposer *composer;
    EMsgComposerHdrs *hdrs;
    GList *to = NULL, *cc = NULL, *bcc = NULL;
    char *subject = NULL, *body = NULL;
    const char *p, *header;
    int len, clen;
    char *content;

    g_return_val_if_fail (strncasecmp (url, "mailto:", 7) == 0, NULL);

    /* Parse recipients (everything after ':' until '?' or eos. */
    p = url + 7;
    len = strcspn (p, "?,");
    if (len) {
        content = g_strndup (p, len);
        to = add_recipients (to, content, TRUE);
        g_free (content);
    }

    p += len;
    if (*p == '?') {
        p++;

        while (*p) {
            len = strcspn (p, "=&");

            /* If it's malformed, give up. */
            if (p[len] != '=')
                break;

            header = p;
            p += len + 1;

            clen = strcspn (p, "&");
            content = g_strndup (p, clen);
            camel_url_decode (content);

            if (!strncasecmp (header, "to", len))
                to = add_recipients (to, content, FALSE);
            else if (!strncasecmp (header, "cc", len))
                cc = add_recipients (cc, content, FALSE);
            else if (!strncasecmp (header, "bcc", len))
                bcc = add_recipients (bcc, content, FALSE);
            else if (!strncasecmp (header, "subject", len))
                subject = g_strdup (content);
            else if (!strncasecmp (header, "body", len))
                body = g_strdup (content);

            g_free (content);
            p += clen;
            if (*p == '&') {
                p++;
                if (!strcmp (p, "amp;"))
                    p += 4;
            }
        }
    }
        
    composer = E_MSG_COMPOSER (e_msg_composer_new ());
    hdrs = E_MSG_COMPOSER_HDRS (composer->hdrs);
    e_msg_composer_hdrs_set_to (hdrs, to);
    free_recipients (to);
    e_msg_composer_hdrs_set_cc (hdrs, cc);
    free_recipients (cc);
    e_msg_composer_hdrs_set_bcc (hdrs, bcc);
    free_recipients (bcc);
    if (subject) {
        e_msg_composer_hdrs_set_subject (hdrs, subject);
        g_free (subject);
    }

    if (body) {
        char *htmlbody = e_text_to_html (body, E_TEXT_TO_HTML_PRE);
        set_editor_text (BONOBO_WIDGET (composer->editor), htmlbody);
        g_free (htmlbody);
    }

    return GTK_WIDGET (composer);
}



/**
 * e_msg_composer_show_attachments:
 * @composer: A message composer widget
 * @show: A boolean specifying whether the attachment bar should be shown or
 * not
 * 
 * If @show is %FALSE, hide the attachment bar.  Otherwise, show it.
 **/
void
e_msg_composer_show_attachments (EMsgComposer *composer,
                 gboolean show)
{
    g_return_if_fail (composer != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER (composer));

    show_attachments (composer, show);
}


/**
 * e_msg_composer_set_headers:
 * @composer: a composer object
 * @to: the values for the "To" header
 * @cc: the values for the "Cc" header
 * @bcc: the values for the "Bcc" header
 * @subject: the value for the "Subject" header
 *
 * Sets the headers in the composer to the given values.
 **/
void 
e_msg_composer_set_headers (EMsgComposer *composer, const GList *to,
                const GList *cc, const GList *bcc,
                const char *subject)
{
    EMsgComposerHdrs *hdrs;

    g_return_if_fail (E_IS_MSG_COMPOSER (composer));
    hdrs = E_MSG_COMPOSER_HDRS (composer->hdrs);

    e_msg_composer_hdrs_set_to (hdrs, to);
    e_msg_composer_hdrs_set_cc (hdrs, cc);
    e_msg_composer_hdrs_set_bcc (hdrs, bcc);
    e_msg_composer_hdrs_set_subject (hdrs, subject);
}


/**
 * e_msg_composer_set_body_text:
 * @composer: a composer object
 * @text: the HTML text to initialize the editor with
 *
 * Loads the given HTML text into the editor.
 **/
void
e_msg_composer_set_body_text (EMsgComposer *composer, const char *text)
{
    g_return_if_fail (E_IS_MSG_COMPOSER (composer));

    set_editor_text (BONOBO_WIDGET (composer->editor), text);
}


/**
 * e_msg_composer_add_header:
 * @composer: a composer object
 * @name: the header name
 * @value: the header value
 *
 * Adds a header with @name and @value to the message. This header
 * may not be displayed by the composer, but will be included in
 * the message it outputs.
 **/
void
e_msg_composer_add_header (EMsgComposer *composer, const char *name,
               const char *value)
{
    g_return_if_fail (E_IS_MSG_COMPOSER (composer));
    g_return_if_fail (name != NULL);
    g_return_if_fail (value != NULL);

    g_ptr_array_add (composer->extra_hdr_names, g_strdup (name));
    g_ptr_array_add (composer->extra_hdr_values, g_strdup (value));
}


/**
 * e_msg_composer_attach:
 * @composer: a composer object
 * @attachment: the CamelMimePart to attach
 *
 * Attaches @attachment to the message being composed in the composer.
 **/
void
e_msg_composer_attach (EMsgComposer *composer, CamelMimePart *attachment)
{
    EMsgComposerAttachmentBar *bar;

    g_return_if_fail (E_IS_MSG_COMPOSER (composer));
    g_return_if_fail (CAMEL_IS_MIME_PART (attachment));

    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (composer->attachment_bar);
    e_msg_composer_attachment_bar_attach_mime_part (bar, attachment);
}


/**
 * e_msg_composer_get_message:
 * @composer: A message composer widget
 * 
 * Retrieve the message edited by the user as a CamelMimeMessage.  The
 * CamelMimeMessage object is created on the fly; subsequent calls to this
 * function will always create new objects from scratch.
 * 
 * Return value: A pointer to the new CamelMimeMessage object
 **/
CamelMimeMessage *
e_msg_composer_get_message (EMsgComposer *composer)
{
    g_return_val_if_fail (composer != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER (composer), NULL);

    return build_message (composer);
}