path: root/shell/e-shortcuts.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-shortcuts.c
 *
 * Copyright (C) 2000  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
 */

/* The shortcut list goes this:

   <?xml version="1.0"?>
   <shortcuts>
           <group title="Evolution shortcuts">
               <item>evolution:/local/Inbox</item>
               <item>evolution:/local/Trash</item>
               <item>evolution:/local/Calendar</item>
       </group>

       <group title="Personal shortcuts">
               <item>evolution:/local/Personal</item>
       </group>
   </shortcuts>

   FIXME: Do we want to use a namespace for this?
 */

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

#include <gtk/gtkobject.h>
#include <gtk/gtktypeutils.h>

#include <gnome-xml/parser.h>
#include <gnome-xml/xmlmemory.h>

#include <string.h>

#include "e-util/e-util.h"
#include "e-util/e-xml-utils.h"

#include "shortcut-bar/e-shortcut-bar.h"
#include "e-shortcuts-view.h"

#include "e-shortcuts.h"


#define PARENT_TYPE GTK_TYPE_OBJECT
static GtkObjectClass *parent_class = NULL;

struct _ShortcutGroup {
    /* Title of the group.  */
    char *title;

    /* A list of strings with the URI for the shortcut.  */
    GList *shortcuts;
};
typedef struct _ShortcutGroup ShortcutGroup;

struct _EShortcutsPrivate {
    /* Name of the file associated with these shortcuts.  Changes in the shortcuts
           will update this file automatically.  */
    char *file_name;

    /* ID of the idle function that will be called to save the shortcuts when they are
           changed.  */
    int save_idle_id;

    /* Whether these shortcuts need to be saved to disk.  */
    gboolean dirty;

    /* The storage set to which these shortcuts are associated.  */
    EStorageSet *storage_set;

    /* The folder type registry.  */
    EFolderTypeRegistry *folder_type_registry;

    /* A list of ShortcutGroups.  */
    GList *groups;

    /* A list of ShortcutViews.  */
    GList *views;

    /* A hash table to get a group given its name.  */
    GHashTable *title_to_group;
};

enum {
    NEW_GROUP,
    REMOVE_GROUP,
    NEW_SHORTCUT,
    REMOVE_SHORTCUT,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };


static void
unload_shortcuts (EShortcuts *shortcuts)
{
    EShortcutsPrivate *priv;
    GList *orig_groups;
    GList *p, *q;

    priv = shortcuts->priv;
    orig_groups = priv->groups;

    for (p = priv->groups; p != NULL; p = p->next) {
        ShortcutGroup *group;

        gtk_signal_emit (GTK_OBJECT (shortcuts), signals[REMOVE_GROUP], 0);

        group = (ShortcutGroup *) p->data;

        g_hash_table_remove (priv->title_to_group, group->title);

        for (q = group->shortcuts; q != NULL; q = q->next)
            g_free (q->data);
        g_free (group->title);

        g_list_free (group->shortcuts);

        priv->groups = priv->groups->next;
    }

    if (orig_groups != NULL)
        g_list_free (orig_groups);

    priv->groups = NULL;

    g_hash_table_destroy (priv->title_to_group);
    priv->title_to_group = g_hash_table_new (g_str_hash, g_str_equal);
}

static gboolean
load_shortcuts (EShortcuts *shortcuts,
        const char *file_name)
{
    EShortcutsPrivate *priv;
    xmlDoc *doc;
    xmlNode *root;
    xmlNode *p, *q;

    /* FIXME: Update the views by emitting the appropriate signals.  */

    priv = shortcuts->priv;

    doc = xmlParseFile (file_name);
    if (doc == NULL)
        return FALSE;

    root = xmlDocGetRootElement (doc);
    if (root == NULL || strcmp (root->name, "shortcuts") != 0) {
        xmlFreeDoc (doc);
        return FALSE;
    }

    unload_shortcuts (shortcuts);

    for (p = root->childs; p != NULL; p = p->next) {
        ShortcutGroup *shortcut_group;
        char *shortcut_group_title;

        if (strcmp ((char *) p->name, "group") != 0)
            continue;

        shortcut_group_title = (char *) xmlGetProp (p, "title");
        if (shortcut_group_title == NULL)
            continue;

        shortcut_group = g_hash_table_lookup (priv->title_to_group,
                              shortcut_group_title);
        if (shortcut_group != NULL) {
            g_warning ("Duplicate shortcut group title -- %s",
                   shortcut_group_title);
            xmlFree (shortcut_group_title);
            continue;
        }

        shortcut_group = g_new (ShortcutGroup, 1);
        shortcut_group->title = g_strdup (shortcut_group_title);
        xmlFree (shortcut_group_title);

        shortcut_group->shortcuts = NULL;
        for (q = p->childs; q != NULL; q = q->next) {
            char *content;

            if (strcmp ((char *) q->name, "item") != 0)
                continue;

            content = xmlNodeListGetString (doc, q->childs, 1);
            shortcut_group->shortcuts = g_list_prepend (shortcut_group->shortcuts,
                                    g_strdup (content));
            xmlFree (content);
        }
        shortcut_group->shortcuts = g_list_reverse (shortcut_group->shortcuts);

        priv->groups = g_list_prepend (priv->groups, shortcut_group);
        g_hash_table_insert (priv->title_to_group, shortcut_group->title, shortcut_group);
    }

    priv->groups = g_list_reverse (priv->groups);

    xmlFreeDoc (doc);

    return TRUE;
}

static gboolean
save_shortcuts (EShortcuts *shortcuts,
        const char *file_name)
{
    EShortcutsPrivate *priv;
    xmlDoc *doc;
    xmlNode *root;
    GList *p, *q;

    priv = shortcuts->priv;

    doc = xmlNewDoc ((xmlChar *) "1.0");
    root = xmlNewDocNode (doc, NULL, (xmlChar *) "shortcuts", NULL);
    xmlDocSetRootElement (doc, root);

    for (p = priv->groups; p != NULL; p = p->next) {
        ShortcutGroup *group;
        xmlNode *group_node;

        group = (ShortcutGroup *) p->data;
        group_node = xmlNewChild (root, NULL, (xmlChar *) "group", NULL);

        xmlSetProp (group_node, (xmlChar *) "title", group->title);

        for (q = group->shortcuts; q != NULL; q = q->next) {
            const char *shortcut;

            shortcut = (const char *) q->data;
            xmlNewChild (group_node, NULL, (xmlChar *) "item", (xmlChar *) shortcut);
        }
    }

    if (xmlSaveFile (file_name, doc) < 0) {
        xmlFreeDoc (doc);
        return FALSE;
    }

    xmlFreeDoc (doc);
    return TRUE;
}


/* Idle function to update the file on disk.  */

static int
idle_cb (void *data)
{
    EShortcuts *shortcuts;
    EShortcutsPrivate *priv;

    shortcuts = E_SHORTCUTS (data);
    priv = shortcuts->priv;

    if (priv->dirty) {
        g_print ("Saving shortcuts -- %s\n", priv->file_name);
        if (! e_shortcuts_save (shortcuts, NULL))
            g_warning ("Saving of shortcuts failed -- %s", priv->file_name);
        else
            priv->dirty = FALSE;
    }

    priv->save_idle_id = 0;

    return FALSE;
}

static void
schedule_idle (EShortcuts *shortcuts)
{
    EShortcutsPrivate *priv;

    priv = shortcuts->priv;

    if (priv->save_idle_id != 0)
        return;

    gtk_idle_add (idle_cb, shortcuts);
}

static void
make_dirty (EShortcuts *shortcuts)
{
    EShortcutsPrivate *priv;

    priv = shortcuts->priv;

    priv->dirty = TRUE;
    schedule_idle (shortcuts);
}


/* Signal handlers for the views.  */

static void
view_destroyed_cb (GtkObject *object,
           gpointer data)
{
    EShortcuts *shortcuts;
    EShortcutsPrivate *priv;

    shortcuts = E_SHORTCUTS (data);
    priv = shortcuts->priv;

    priv->views = g_list_remove (priv->views, object);
}


/* GtkObject methods.  */

static void
destroy (GtkObject *object)
{
    EShortcuts *shortcuts;
    EShortcutsPrivate *priv;

    shortcuts = E_SHORTCUTS (object);
    priv = shortcuts->priv;

    g_free (priv->file_name);

    if (priv->storage_set != NULL)
        gtk_object_unref (GTK_OBJECT (priv->storage_set));

    if (priv->folder_type_registry != NULL)
        gtk_object_unref (GTK_OBJECT (priv->folder_type_registry));

    unload_shortcuts (shortcuts);

    if (priv->save_idle_id != 0)
        gtk_idle_remove (priv->save_idle_id);

    if (priv->dirty) {
        if (! e_shortcuts_save (shortcuts, NULL))
            g_warning (_("Error saving shortcuts.")); /* FIXME */
    }

    g_hash_table_destroy (priv->title_to_group);

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

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

    object_class = (GtkObjectClass*) klass;
    object_class->destroy = destroy;

    parent_class = gtk_type_class (gtk_object_get_type ());

    signals[NEW_GROUP]
        = gtk_signal_new ("new_group",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EShortcutsClass, new_group),
                  gtk_marshal_NONE__INT,
                  GTK_TYPE_NONE, 1,
                  GTK_TYPE_INT);

    signals[REMOVE_GROUP]
        = gtk_signal_new ("remove_group",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EShortcutsClass, remove_group),
                  gtk_marshal_NONE__INT,
                  GTK_TYPE_NONE, 1,
                  GTK_TYPE_INT);

    signals[NEW_SHORTCUT]
        = gtk_signal_new ("new_shortcut",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EShortcutsClass, new_shortcut),
                  gtk_marshal_NONE__INT_INT,
                  GTK_TYPE_NONE, 2,
                  GTK_TYPE_INT,
                  GTK_TYPE_INT);

    signals[REMOVE_SHORTCUT]
        = gtk_signal_new ("remove_shortcut",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EShortcutsClass, remove_shortcut),
                  gtk_marshal_NONE__INT_INT,
                  GTK_TYPE_NONE, 2,
                  GTK_TYPE_INT,
                  GTK_TYPE_INT);

    gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
}


static void
init (EShortcuts *shortcuts)
{
    EShortcutsPrivate *priv;

    priv = g_new (EShortcutsPrivate, 1);

    priv->file_name      = NULL;
    priv->storage_set    = NULL;
    priv->groups         = NULL;
    priv->views          = NULL;
    priv->title_to_group = g_hash_table_new (g_str_hash, g_str_equal);
    priv->dirty          = 0;
    priv->save_idle_id   = 0;

    shortcuts->priv = priv;
}


void
e_shortcuts_construct (EShortcuts  *shortcuts,
               EStorageSet *storage_set,
               EFolderTypeRegistry *folder_type_registry)
{
    EShortcutsPrivate *priv;

    g_return_if_fail (shortcuts != NULL);
    g_return_if_fail (E_IS_SHORTCUTS (shortcuts));
    g_return_if_fail (storage_set != NULL);
    g_return_if_fail (E_IS_STORAGE_SET (storage_set));

    GTK_OBJECT_UNSET_FLAGS (GTK_OBJECT (shortcuts), GTK_FLOATING);

    priv = shortcuts->priv;

    gtk_object_ref (GTK_OBJECT (storage_set));
    priv->storage_set = storage_set;

    gtk_object_ref (GTK_OBJECT (folder_type_registry));
    priv->folder_type_registry = folder_type_registry;
}

EShortcuts *
e_shortcuts_new (EStorageSet *storage_set,
         EFolderTypeRegistry *folder_type_registry,
         const char *file_name)
{
    EShortcuts *new;

    g_return_val_if_fail (storage_set != NULL, NULL);
    g_return_val_if_fail (E_IS_STORAGE_SET (storage_set), NULL);

    new = gtk_type_new (e_shortcuts_get_type ());
    e_shortcuts_construct (new, storage_set, folder_type_registry);

    if (! e_shortcuts_load (new, file_name)) {
        gtk_object_unref (GTK_OBJECT (new));
        return NULL;
    }

    return new;
}


GList *
e_shortcuts_get_group_titles (EShortcuts *shortcuts)
{
    EShortcutsPrivate *priv;
    ShortcutGroup *group;
    GList *list;
    GList *p;

    g_return_val_if_fail (shortcuts != NULL, NULL);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), NULL);

    priv = shortcuts->priv;

    list = NULL;

    for (p = priv->groups; p != NULL; p = p->next) {
        group = (ShortcutGroup *) p->data;
        list = g_list_prepend (list, g_strdup (group->title));
    }

    return g_list_reverse (list);
}

GList *
e_shortcuts_get_shortcuts_in_group (EShortcuts *shortcuts,
                    const char *group_title)
{
    EShortcutsPrivate *priv;
    ShortcutGroup *shortcut_group;
    GList *list;
    GList *p;

    priv = shortcuts->priv;

    g_return_val_if_fail (shortcuts != NULL, NULL);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), NULL);
    g_return_val_if_fail (group_title != NULL, NULL);

    shortcut_group = g_hash_table_lookup (priv->title_to_group, group_title);
    if (shortcut_group == NULL)
        return NULL;

    list = NULL;

    for (p = shortcut_group->shortcuts; p != NULL; p = p->next)
        list = g_list_prepend (list, g_strdup ((const char *) p->data));

    return g_list_reverse (list);
}


EStorageSet *
e_shortcuts_get_storage_set (EShortcuts *shortcuts)
{
    g_return_val_if_fail (shortcuts != NULL, NULL);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), NULL);

    return shortcuts->priv->storage_set;
}


GtkWidget *
e_shortcuts_new_view (EShortcuts *shortcuts)
{
    EShortcutsPrivate *priv;
    GtkWidget *new;

    g_return_val_if_fail (shortcuts != NULL, NULL);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), NULL);

    priv = shortcuts->priv;

    new = e_shortcuts_view_new (shortcuts);
    priv->views = g_list_prepend (priv->views, new);

    gtk_signal_connect (GTK_OBJECT (new), "destroy", view_destroyed_cb, shortcuts);

    return new;
}


gboolean
e_shortcuts_load (EShortcuts *shortcuts,
          const char *file_name)
{
    EShortcutsPrivate *priv;
    char *tmp;

    g_return_val_if_fail (shortcuts != NULL, FALSE);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), FALSE);
    g_return_val_if_fail (file_name == NULL || g_path_is_absolute (file_name), FALSE);

    priv = shortcuts->priv;

    if (file_name == NULL) {
        if (priv->file_name == NULL)
            return FALSE;
        file_name = priv->file_name;
    }

    if (! load_shortcuts (shortcuts, file_name))
        return FALSE;

    tmp = g_strdup (file_name);
    g_free (priv->file_name);
    priv->file_name = tmp;

    return TRUE;
}

gboolean
e_shortcuts_save (EShortcuts *shortcuts,
          const char *file_name)
{
    EShortcutsPrivate *priv;
    char *tmp;

    g_return_val_if_fail (shortcuts != NULL, FALSE);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), FALSE);
    g_return_val_if_fail (file_name == NULL || g_path_is_absolute (file_name), FALSE);

    priv = shortcuts->priv;

    if (file_name == NULL) {
        if (priv->file_name == NULL)
            return FALSE;
        file_name = priv->file_name;
    }

    if (! save_shortcuts (shortcuts, file_name))
        return FALSE;

    tmp = g_strdup (file_name);
    g_free (priv->file_name);
    priv->file_name = tmp;

    return TRUE;
}


const char *
e_shortcuts_get_uri (EShortcuts *shortcuts, int group_num, int num)
{
    EShortcutsPrivate *priv;
    ShortcutGroup *group;
    GList *shortcut_element;

    g_return_val_if_fail (shortcuts != NULL, NULL);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), NULL);

    priv = shortcuts->priv;

    group = g_list_nth (priv->groups, group_num)->data;
    if (group == NULL)
        return NULL;

    shortcut_element = g_list_nth (group->shortcuts, num);
    if (shortcut_element == NULL)
        return NULL;

    return shortcut_element->data;
}


void
e_shortcuts_remove_shortcut (EShortcuts *shortcuts,
                 int group_num,
                 int num)
{
    EShortcutsPrivate *priv;
    ShortcutGroup *group;
    GList *p;
    char *uri;

    g_return_if_fail (shortcuts != NULL);
    g_return_if_fail (E_IS_SHORTCUTS (shortcuts));

    priv = shortcuts->priv;

    p = g_list_nth (priv->groups, group_num);
    g_return_if_fail (p != NULL);

    group = (ShortcutGroup *) p->data;

    p = g_list_nth (group->shortcuts, num);
    g_return_if_fail (p != NULL);

    gtk_signal_emit (GTK_OBJECT (shortcuts), signals[REMOVE_SHORTCUT], group_num, num);

    uri = (char *) p->data;
    g_free (uri);

    group->shortcuts = g_list_remove_link (group->shortcuts, p);

    make_dirty (shortcuts);
}

void
e_shortcuts_add_shortcut (EShortcuts *shortcuts,
              int group_num,
              int num,
              const char *uri)
{
    EShortcutsPrivate *priv;
    ShortcutGroup *group;
    GList *p;

    g_return_if_fail (shortcuts != NULL);
    g_return_if_fail (E_IS_SHORTCUTS (shortcuts));

    priv = shortcuts->priv;

    p = g_list_nth (priv->groups, group_num);
    g_return_if_fail (p != NULL);

    group = (ShortcutGroup *) p->data;

    group->shortcuts = g_list_insert (group->shortcuts, g_strdup (uri), num);

    gtk_signal_emit (GTK_OBJECT (shortcuts), signals[NEW_SHORTCUT], group_num, num);

    make_dirty (shortcuts);
}

void
e_shortcuts_remove_group (EShortcuts *shortcuts,
              int group_num)
{
    EShortcutsPrivate *priv;
    ShortcutGroup *group;
    GList *p;

    g_return_if_fail (shortcuts != NULL);
    g_return_if_fail (E_IS_SHORTCUTS (shortcuts));

    priv = shortcuts->priv;

    p = g_list_nth (priv->groups, group_num);
    g_return_if_fail (p != NULL);

    gtk_signal_emit (GTK_OBJECT (shortcuts), signals[REMOVE_GROUP], group_num);

    group = (ShortcutGroup *) p->data;

    e_free_string_list (group->shortcuts);

    priv->groups = g_list_remove_link (priv->groups, p);

    make_dirty (shortcuts);
}

void
e_shortcuts_add_group (EShortcuts *shortcuts,
               int group_num,
               const char *group_name)
{
    EShortcutsPrivate *priv;
    ShortcutGroup *group;

    g_return_if_fail (shortcuts != NULL);
    g_return_if_fail (E_IS_SHORTCUTS (shortcuts));

    priv = shortcuts->priv;

    group = g_new (ShortcutGroup, 1);
    group->title     = g_strdup (group_name);
    group->shortcuts = NULL;

    priv->groups = g_list_insert (priv->groups, group, group_num);

    gtk_signal_emit (GTK_OBJECT (shortcuts), signals[NEW_GROUP], group_num);

    make_dirty (shortcuts);
}


E_MAKE_TYPE (e_shortcuts, "EShortcuts", EShortcuts, class_init, init, PARENT_TYPE)