path: root/mail/em-vfolder-rule.c

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Not Zed <notzed@lostzed.mmc.com.au>
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <string.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>

#include <shell/e-shell.h>

#include <e-util/e-util.h>
#include <e-util/e-alert.h>
#include <e-util/e-util-private.h>

#include <libemail-engine/e-mail-folder-utils.h>

#include "em-folder-selector.h"
#include "em-folder-tree.h"
#include "em-utils.h"
#include "em-vfolder-context.h"
#include "em-vfolder-rule.h"

#define EM_VFOLDER_RULE_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), EM_TYPE_VFOLDER_RULE, EMVFolderRulePrivate))

struct _EMVFolderRulePrivate {
    EMailSession *session;
};

enum {
    PROP_0,
    PROP_SESSION
};

static gint validate (EFilterRule *, EAlert **alert);
static gint vfolder_eq (EFilterRule *fr, EFilterRule *cm);
static xmlNodePtr xml_encode (EFilterRule *);
static gint xml_decode (EFilterRule *, xmlNodePtr, ERuleContext *f);
static void rule_copy (EFilterRule *dest, EFilterRule *src);
static GtkWidget *get_widget (EFilterRule *fr, ERuleContext *f);

/* DO NOT internationalise these strings */
static const gchar *with_names[] = {
    "specific",
    "local_remote_active",
    "remote_active",
    "local"
};

G_DEFINE_TYPE (
    EMVFolderRule,
    em_vfolder_rule,
    E_TYPE_FILTER_RULE)

static void
vfolder_rule_set_session (EMVFolderRule *rule,
                          EMailSession *session)
{
    if (session == NULL) {
        EShell *shell;
        EShellBackend *shell_backend;
        EMailBackend *backend;

        shell = e_shell_get_default ();
        shell_backend = e_shell_get_backend_by_name (shell, "mail");

        backend = E_MAIL_BACKEND (shell_backend);
        session = e_mail_backend_get_session (backend);
    }

    g_return_if_fail (E_IS_MAIL_SESSION (session));
    g_return_if_fail (rule->priv->session == NULL);

    rule->priv->session = g_object_ref (session);
}

static void
vfolder_rule_set_property (GObject *object,
                           guint property_id,
                           const GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SESSION:
            vfolder_rule_set_session (
                EM_VFOLDER_RULE (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
vfolder_rule_get_property (GObject *object,
                           guint property_id,
                           GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SESSION:
            g_value_set_object (
                value,
                em_vfolder_rule_get_session (
                EM_VFOLDER_RULE (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
vfolder_rule_dispose (GObject *object)
{
    EMVFolderRulePrivate *priv;

    priv = EM_VFOLDER_RULE_GET_PRIVATE (object);

    if (priv->session != NULL) {
        g_object_unref (priv->session);
        priv->session = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (em_vfolder_rule_parent_class)->dispose (object);
}

static void
vfolder_rule_finalize (GObject *object)
{
    EMVFolderRule *rule = EM_VFOLDER_RULE (object);
    gchar *uri;

    while ((uri = g_queue_pop_head (&rule->sources)) != NULL)
        g_free (uri);

    /* Chain up to parent's finalize() method. */
    G_OBJECT_CLASS (em_vfolder_rule_parent_class)->finalize (object);
}

static void
em_vfolder_rule_class_init (EMVFolderRuleClass *class)
{
    GObjectClass *object_class;
    EFilterRuleClass *filter_rule_class;

    g_type_class_add_private (class, sizeof (EMVFolderRulePrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = vfolder_rule_set_property;
    object_class->get_property = vfolder_rule_get_property;
    object_class->dispose = vfolder_rule_dispose;
    object_class->finalize = vfolder_rule_finalize;

    filter_rule_class = E_FILTER_RULE_CLASS (class);
    filter_rule_class->validate = validate;
    filter_rule_class->eq = vfolder_eq;
    filter_rule_class->xml_encode = xml_encode;
    filter_rule_class->xml_decode = xml_decode;
    filter_rule_class->copy = rule_copy;
    filter_rule_class->get_widget = get_widget;

    g_object_class_install_property (
        object_class,
        PROP_SESSION,
        g_param_spec_object (
            "session",
            NULL,
            NULL,
            E_TYPE_MAIL_SESSION,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY));
}

static void
em_vfolder_rule_init (EMVFolderRule *rule)
{
    rule->priv = EM_VFOLDER_RULE_GET_PRIVATE (rule);
    rule->with = EM_VFOLDER_RULE_WITH_SPECIFIC;
    rule->rule.source = g_strdup ("incoming");
}

EFilterRule *
em_vfolder_rule_new (EMailSession *session)
{
    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);

    return g_object_new (
        EM_TYPE_VFOLDER_RULE, "session", session, NULL);
}

EMailSession *
em_vfolder_rule_get_session (EMVFolderRule *rule)
{
    g_return_val_if_fail (EM_IS_VFOLDER_RULE (rule), NULL);

    return rule->priv->session;
}

void
em_vfolder_rule_add_source (EMVFolderRule *rule,
                            const gchar *uri)
{
    g_return_if_fail (EM_IS_VFOLDER_RULE (rule));
    g_return_if_fail (uri);

    g_queue_push_tail (&rule->sources, g_strdup (uri));

    e_filter_rule_emit_changed (E_FILTER_RULE (rule));
}

const gchar *
em_vfolder_rule_find_source (EMVFolderRule *rule,
                             const gchar *uri)
{
    GList *link;

    g_return_val_if_fail (EM_IS_VFOLDER_RULE (rule), NULL);

    /* only does a simple string or address comparison, should
     * probably do a decoded url comparison */
    link = g_queue_find_custom (
        &rule->sources, uri, (GCompareFunc) strcmp);

    return (link != NULL) ? link->data : NULL;
}

void
em_vfolder_rule_remove_source (EMVFolderRule *rule,
                               const gchar *uri)
{
    gchar *found;

    g_return_if_fail (EM_IS_VFOLDER_RULE (rule));

    found =(gchar *) em_vfolder_rule_find_source (rule, uri);
    if (found != NULL) {
        g_queue_remove (&rule->sources, found);
        g_free (found);
        e_filter_rule_emit_changed (E_FILTER_RULE (rule));
    }
}

const gchar *
em_vfolder_rule_next_source (EMVFolderRule *rule,
                             const gchar *last)
{
    GList *link;

    if (last == NULL) {
        link = g_queue_peek_head_link (&rule->sources);
    } else {
        link = g_queue_find (&rule->sources, last);
        if (link == NULL)
            link = g_queue_peek_head_link (&rule->sources);
        else
            link = g_list_next (link);
    }

    return (link != NULL) ? link->data : NULL;
}

static gint
validate (EFilterRule *fr,
          EAlert **alert)
{
    g_return_val_if_fail (fr != NULL, 0);
    g_warn_if_fail (alert == NULL || *alert == NULL);

    if (!fr->name || !*fr->name) {
        if (alert)
            *alert = e_alert_new ("mail:no-name-vfolder", NULL);
        return 0;
    }

    /* We have to have at least one source set in the "specific" case.
     * Do not translate this string! */
    if (((EMVFolderRule *) fr)->with == EM_VFOLDER_RULE_WITH_SPECIFIC &&
        g_queue_is_empty (&((EMVFolderRule *) fr)->sources)) {
        if (alert)
            *alert = e_alert_new ("mail:vfolder-no-source", NULL);
        return 0;
    }

    return E_FILTER_RULE_CLASS (em_vfolder_rule_parent_class)->validate (fr, alert);
}

static gint
queue_eq (GQueue *queue_a,
          GQueue *queue_b)
{
    GList *link_a;
    GList *link_b;
    gint truth = TRUE;

    link_a = g_queue_peek_head_link (queue_a);
    link_b = g_queue_peek_head_link (queue_b);

    while (truth && link_a != NULL && link_b != NULL) {
        gchar *uri_a = link_a->data;
        gchar *uri_b = link_b->data;

        truth = (strcmp (uri_a, uri_b)== 0);

        link_a = g_list_next (link_a);
        link_b = g_list_next (link_b);
    }

    return truth && link_a == NULL && link_b == NULL;
}

static gint
vfolder_eq (EFilterRule *fr,
            EFilterRule *cm)
{
    return E_FILTER_RULE_CLASS (em_vfolder_rule_parent_class)->eq (fr, cm)
        && queue_eq (
            &((EMVFolderRule *) fr)->sources,
            &((EMVFolderRule *) cm)->sources);
}

static xmlNodePtr
xml_encode (EFilterRule *fr)
{
    EMVFolderRule *vr =(EMVFolderRule *) fr;
    xmlNodePtr node, set, work;
    GList *head, *link;

    node = E_FILTER_RULE_CLASS (em_vfolder_rule_parent_class)->xml_encode (fr);
    g_return_val_if_fail (node != NULL, NULL);
    g_return_val_if_fail (vr->with < G_N_ELEMENTS (with_names), NULL);

    set = xmlNewNode(NULL, (const guchar *)"sources");
    xmlAddChild (node, set);
    xmlSetProp(set, (const guchar *)"with", (guchar *)with_names[vr->with]);

    head = g_queue_peek_head_link (&vr->sources);
    for (link = head; link != NULL; link = g_list_next (link)) {
        const gchar *uri = link->data;

        work = xmlNewNode (NULL, (const guchar *) "folder");
        xmlSetProp (work, (const guchar *) "uri", (guchar *) uri);
        xmlAddChild (set, work);
    }

    return node;
}

static void
set_with (EMVFolderRule *vr,
          const gchar *name)
{
    gint i;

    for (i = 0; i < G_N_ELEMENTS (with_names); i++) {
        if (!strcmp (name, with_names[i])) {
            vr->with = i;
            return;
        }
    }

    vr->with = 0;
}

static gint
xml_decode (EFilterRule *fr,
            xmlNodePtr node,
            ERuleContext *f)
{
    xmlNodePtr set, work;
    gint result;
    EMVFolderRule *vr =(EMVFolderRule *) fr;
    gchar *tmp;

    result = E_FILTER_RULE_CLASS (em_vfolder_rule_parent_class)->
        xml_decode (fr, node, f);
    if (result != 0)
        return result;

    /* handle old format file, vfolder source is in filterrule */
    if (strcmp(fr->source, "incoming")!= 0) {
        set_with (vr, fr->source);
        g_free (fr->source);
        fr->source = g_strdup("incoming");
    }

    set = node->children;
    while (set) {
        if (!strcmp((gchar *)set->name, "sources")) {
            tmp = (gchar *)xmlGetProp(set, (const guchar *)"with");
            if (tmp) {
                set_with (vr, tmp);
                xmlFree (tmp);
            }
            work = set->children;
            while (work) {
                if (!strcmp((gchar *)work->name, "folder")) {
                    tmp = (gchar *)xmlGetProp(work, (const guchar *)"uri");
                    if (tmp) {
                        g_queue_push_tail (&vr->sources, g_strdup (tmp));
                        xmlFree (tmp);
                    }
                }
                work = work->next;
            }
        }
        set = set->next;
    }
    return 0;
}

static void
rule_copy (EFilterRule *dest,
           EFilterRule *src)
{
    EMVFolderRule *vdest, *vsrc;
    GList *head, *link;
    gchar *uri;

    vdest =(EMVFolderRule *) dest;
    vsrc =(EMVFolderRule *) src;

    while ((uri = g_queue_pop_head (&vdest->sources)) != NULL)
        g_free (uri);

    head = g_queue_peek_head_link (&vsrc->sources);
    for (link = head; link != NULL; link = g_list_next (link)) {
        const gchar *uri = link->data;
        g_queue_push_tail (&vdest->sources, g_strdup (uri));
    }

    vdest->with = vsrc->with;

    E_FILTER_RULE_CLASS (em_vfolder_rule_parent_class)->copy (dest, src);
}

enum {
    BUTTON_ADD,
    BUTTON_REMOVE,
    BUTTON_LAST
};

struct _source_data {
    ERuleContext *rc;
    EMVFolderRule *vr;
    const gchar *current;
    GtkListStore *model;
    GtkTreeView *list;
    GtkWidget *source_selector;
    GtkButton *buttons[BUTTON_LAST];
};

static void source_add (GtkWidget *widget, struct _source_data *data);
static void source_remove (GtkWidget *widget, struct _source_data *data);

static struct {
    const gchar *name;
    GCallback func;
} edit_buttons[] = {
    { "source_add",    G_CALLBACK(source_add)   },
    { "source_remove", G_CALLBACK(source_remove)},
};

static void
set_sensitive (struct _source_data *data)
{
    gtk_widget_set_sensitive (
        GTK_WIDGET (data->buttons[BUTTON_ADD]), TRUE);
    gtk_widget_set_sensitive (
        GTK_WIDGET (data->buttons[BUTTON_REMOVE]),
        data->current != NULL);
}

static void
select_source (GtkWidget *list,
               struct _source_data *data)
{
    GtkTreeViewColumn *column;
    GtkTreePath *path;
    GtkTreeIter iter;

    gtk_tree_view_get_cursor (data->list, &path, &column);
    gtk_tree_model_get_iter (GTK_TREE_MODEL (data->model), &iter, path);
    gtk_tree_path_free (path);

    gtk_tree_model_get (GTK_TREE_MODEL (data->model), &iter, 0, &data->current, -1);

    set_sensitive (data);
}

static void
select_source_with_changed (GtkWidget *widget,
                            struct _source_data *data)
{
    em_vfolder_rule_with_t with = 0;
    GSList *group = NULL;
    gint i = 0;

    if (!gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
        return;

    group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (widget));

    for (i = 0; i< g_slist_length (group); i++) {
        if (g_slist_nth_data (group, with = i) == widget)
            break;
    }

    if (with > EM_VFOLDER_RULE_WITH_LOCAL )
        with = 0;

    gtk_widget_set_sensitive (data->source_selector, !with );

    data->vr->with = with;
}

static void
vfr_folder_response (EMFolderSelector *selector,
                     gint button,
                     struct _source_data *data)
{
    EMFolderTreeModel *model;
    EMailSession *session;
    const gchar *uri;

    model = em_folder_selector_get_model (selector);
    session = em_folder_tree_model_get_session (model);

    uri = em_folder_selector_get_selected_uri (selector);

    if (button == GTK_RESPONSE_OK && uri != NULL) {
        GtkTreeSelection *selection;
        GtkTreeIter iter;
        gchar *markup;

        g_queue_push_tail (&data->vr->sources, g_strdup (uri));

        markup = e_mail_folder_uri_to_markup (
            CAMEL_SESSION (session), uri, NULL);

        gtk_list_store_append (data->model, &iter);
        gtk_list_store_set (data->model, &iter, 0, markup, 1, uri, -1);
        selection = gtk_tree_view_get_selection (data->list);
        gtk_tree_selection_select_iter (selection, &iter);
        data->current = uri;

        g_free (markup);

        set_sensitive (data);
    }

    gtk_widget_destroy (GTK_WIDGET (selector));
}

static void
source_add (GtkWidget *widget,
            struct _source_data *data)
{
    EMFolderTree *folder_tree;
    EMFolderTreeModel *model;
    GtkWidget *dialog;
    gpointer parent;

    parent = gtk_widget_get_toplevel (widget);
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    model = em_folder_tree_model_get_default ();

    dialog = em_folder_selector_new (
        parent, model,
        EM_FOLDER_SELECTOR_CAN_CREATE,
        _("Add Folder"), NULL, _("_Add"));

    folder_tree = em_folder_selector_get_folder_tree (
        EM_FOLDER_SELECTOR (dialog));

    em_folder_tree_set_excluded (folder_tree, EMFT_EXCLUDE_NOSELECT);

    g_signal_connect (
        dialog, "response",
        G_CALLBACK (vfr_folder_response), data);

    gtk_widget_show (dialog);
}

static void
source_remove (GtkWidget *widget,
               struct _source_data *data)
{
    GtkTreeSelection *selection;
    const gchar *source;
    GtkTreePath *path;
    GtkTreeIter iter;
    gint index = 0;
    gint n;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (data->list));

    source = NULL;
    while ((source = em_vfolder_rule_next_source (data->vr, source))) {
        path = gtk_tree_path_new ();
        gtk_tree_path_append_index (path, index);

        if (gtk_tree_selection_path_is_selected (selection, path)) {
            gtk_tree_model_get_iter (GTK_TREE_MODEL (data->model), &iter, path);

            em_vfolder_rule_remove_source (data->vr, source);
            gtk_list_store_remove (data->model, &iter);
            gtk_tree_path_free (path);

            /* now select the next rule */
            n = gtk_tree_model_iter_n_children (GTK_TREE_MODEL (data->model), NULL);
            index = index >= n ? n - 1 : index;

            if (index >= 0) {
                path = gtk_tree_path_new ();
                gtk_tree_path_append_index (path, index);
                gtk_tree_model_get_iter (GTK_TREE_MODEL (data->model), &iter, path);
                gtk_tree_path_free (path);

                gtk_tree_selection_select_iter (selection, &iter);
                gtk_tree_model_get (
                    GTK_TREE_MODEL (data->model), &iter,
                    0, &data->current, -1);
            } else {
                data->current = NULL;
            }

            break;
        }

        index++;
        gtk_tree_path_free (path);
    }

    set_sensitive (data);
}

static GtkWidget *
get_widget (EFilterRule *fr,
            ERuleContext *rc)
{
    EMVFolderRule *vr =(EMVFolderRule *) fr;
    EMailSession *session;
    GtkWidget *widget, *frame;
    struct _source_data *data;
    GtkRadioButton *rb;
    const gchar *source;
    GtkTreeIter iter;
    GtkBuilder *builder;
    GObject *object;
    gint i;

    widget = E_FILTER_RULE_CLASS (em_vfolder_rule_parent_class)->
        get_widget (fr, rc);

    data = g_malloc0 (sizeof (*data));
    data->rc = rc;
    data->vr = vr;

    builder = gtk_builder_new ();
    e_load_ui_builder_definition (builder, "mail-dialogs.ui");

        frame = e_builder_get_widget(builder, "vfolder_source_frame");

    g_object_set_data_full((GObject *)frame, "data", data, g_free);

    for (i = 0; i < BUTTON_LAST; i++) {
        data->buttons[i] =(GtkButton *)
            e_builder_get_widget (builder, edit_buttons[i].name);
        g_signal_connect (data->buttons[i], "clicked", edit_buttons[i].func, data);
    }

    object = gtk_builder_get_object (builder, "source_list");
    data->list = GTK_TREE_VIEW (object);
    object = gtk_builder_get_object (builder, "source_model");
    data->model = GTK_LIST_STORE (object);

    session = em_vfolder_context_get_session (EM_VFOLDER_CONTEXT (rc));

    source = NULL;
    while ((source = em_vfolder_rule_next_source (vr, source))) {
        gchar *markup;

        markup = e_mail_folder_uri_to_markup (
            CAMEL_SESSION (session), source, NULL);

        gtk_list_store_append (data->model, &iter);
        gtk_list_store_set (data->model, &iter, 0, markup, 1, source, -1);
        g_free (markup);
    }

    g_signal_connect (data->list, "cursor-changed", G_CALLBACK(select_source), data);

    rb = (GtkRadioButton *)e_builder_get_widget (builder, "local_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    rb = (GtkRadioButton *)e_builder_get_widget (builder, "remote_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    rb = (GtkRadioButton *)e_builder_get_widget (builder, "local_and_remote_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    rb = (GtkRadioButton *) e_builder_get_widget (builder, "specific_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    data->source_selector = (GtkWidget *)
        e_builder_get_widget (builder, "source_selector");

    rb = g_slist_nth_data (gtk_radio_button_get_group (rb), vr->with);
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (rb), TRUE);
    g_signal_emit_by_name (rb, "toggled");

    set_sensitive (data);

    gtk_box_pack_start (GTK_BOX (widget), frame, TRUE, TRUE, 3);

    g_object_unref (builder);

    return widget;
}