path: root/plugins/templates/templates.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:
 *      Diego Escalante Urrelo <diegoe@gnome.org>
 *      Bharath Acharya <abharath@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 * Copyright (C) 2008 - Diego Escalante Urrelo
 *
 */

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

#include <glade/glade.h>
#include <gconf/gconf-client.h>

#include <e-util/e-config.h>
#include <camel/camel-url.h>
#include <camel/camel-multipart.h>
#include <camel/camel-stream-mem.h>

#include <mail/e-mail-local.h>
#include <mail/e-mail-reader.h>
#include <mail/em-composer-utils.h>
#include <mail/mail-session.h>
#include <mail/mail-ops.h>
#include <mail/message-list.h>
#include <e-util/e-error.h>
#include <e-util/e-plugin.h>
#include <e-util/e-util.h>
#include <shell/e-shell-view.h>

#include <composer/e-msg-composer.h>

#define GCONF_KEY_TEMPLATE_PLACEHOLDERS "/apps/evolution/mail/template_placeholders"

typedef struct {
    GladeXML *xml;
    GConfClient *gconf;
    GtkWidget   *treeview;
    GtkWidget   *clue_add;
    GtkWidget   *clue_edit;
    GtkWidget   *clue_remove;
    GtkListStore *store;
} UIData;

enum {
    CLUE_KEYWORD_COLUMN,
    CLUE_VALUE_COLUMN,
    CLUE_N_COLUMNS
};

GtkWidget *e_plugin_lib_get_configure_widget    (EPlugin *epl);

gboolean e_plugin_ui_init   (GtkUIManager *ui_manager, GObject *object);
gint e_plugin_lib_enable    (EPlugin *plugin, gboolean enabled);

/* Thanks to attachment reminder plugin for this*/
static void commit_changes (UIData *ui);

static void  key_cell_edited_callback (GtkCellRendererText *cell, gchar *path_string,
                   gchar *new_text,UIData *ui);

static void  value_cell_edited_callback (GtkCellRendererText *cell, gchar *path_string,
                   gchar *new_text,UIData *ui);

static gboolean clue_foreach_check_isempty (GtkTreeModel *model, GtkTreePath
                    *path, GtkTreeIter *iter, UIData *ui);

static gboolean plugin_enabled;

static void
selection_changed (GtkTreeSelection *selection, UIData *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;

    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        gtk_widget_set_sensitive (ui->clue_edit, TRUE);
        gtk_widget_set_sensitive (ui->clue_remove, TRUE);
    } else {
        gtk_widget_set_sensitive (ui->clue_edit, FALSE);
        gtk_widget_set_sensitive (ui->clue_remove, FALSE);
    }
}

static void
destroy_ui_data (gpointer data)
{
    UIData *ui = (UIData *) data;

    if (!ui)
        return;

    g_object_unref (ui->xml);
    g_object_unref (ui->gconf);
    g_free (ui);
}

static void
commit_changes (UIData *ui)
{
    GtkTreeModel *model = NULL;
    GSList *clue_list = NULL;
    GtkTreeIter iter;
    gboolean valid;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    valid = gtk_tree_model_get_iter_first (model, &iter);

    while (valid) {
        gchar *keyword, *value;
        gchar *key;

        gtk_tree_model_get (model, &iter, CLUE_KEYWORD_COLUMN, &keyword, -1);
        gtk_tree_model_get (model, &iter, CLUE_VALUE_COLUMN, &value, -1);

        /* Check if the keyword and value are not empty */
        if ((keyword) && (value) && (g_utf8_strlen(g_strstrip(keyword), -1) > 0)
            && (g_utf8_strlen(g_strstrip(value), -1) > 0)) {
            key = g_strdup_printf("%s=%s", keyword, value);
            clue_list = g_slist_append (clue_list, key);
        }
        valid = gtk_tree_model_iter_next (model, &iter);
    }

    gconf_client_set_list (ui->gconf, GCONF_KEY_TEMPLATE_PLACEHOLDERS, GCONF_VALUE_STRING, clue_list, NULL);

    g_slist_foreach (clue_list, (GFunc) g_free, NULL);
    g_slist_free (clue_list);
}

static void
clue_check_isempty (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, UIData *ui)
{
    GtkTreeSelection *selection;
    gchar *keyword = NULL;
    gboolean valid;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    /* move to the previous node */
    valid = gtk_tree_path_prev (path);

    gtk_tree_model_get (model, iter, CLUE_KEYWORD_COLUMN, &keyword, -1);
    if ((keyword) && !(g_utf8_strlen (g_strstrip (keyword), -1) > 0))
        gtk_list_store_remove (ui->store, iter);

    /* Check if we have a valid row to select. If not, then select
     * the previous row */
    if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (model), iter)) {
        gtk_tree_selection_select_iter (selection, iter);
    } else {
        if (path && valid) {
            gtk_tree_model_get_iter (model, iter, path);
            gtk_tree_selection_select_iter (selection, iter);
        }
    }

    gtk_widget_grab_focus (ui->treeview);
    g_free (keyword);
}

static gboolean
clue_foreach_check_isempty (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, UIData *ui)
{
    gboolean valid;

    valid = gtk_tree_model_get_iter_first (model, iter);
    while (valid && gtk_list_store_iter_is_valid (ui->store, iter)) {
        gchar *keyword = NULL;
        gtk_tree_model_get (model, iter, CLUE_KEYWORD_COLUMN, &keyword, -1);
        /* Check if the keyword is not empty and then emit the row-changed
        signal (if we delete the row, then the iter gets corrupted) */
        if ((keyword) && !(g_utf8_strlen (g_strstrip (keyword), -1) > 0))
            gtk_tree_model_row_changed (model, path, iter);

        g_free (keyword);
        valid = gtk_tree_model_iter_next (model, iter);
    }

    return FALSE;
}

static void
key_cell_edited_callback (GtkCellRendererText *cell,
              gchar               *path_string,
              gchar               *new_text,
              UIData             *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    gchar *value;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));

    gtk_tree_model_get_iter_from_string (model, &iter, path_string);

    gtk_tree_model_get (model, &iter, CLUE_VALUE_COLUMN, &value, -1);
    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    CLUE_KEYWORD_COLUMN, new_text, CLUE_VALUE_COLUMN, value, -1);

    commit_changes (ui);
}

static void
value_cell_edited_callback (GtkCellRendererText *cell,
              gchar               *path_string,
              gchar               *new_text,
              UIData             *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    gchar *keyword;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));

    gtk_tree_model_get_iter_from_string (model, &iter, path_string);

    gtk_tree_model_get (model, &iter, CLUE_KEYWORD_COLUMN, &keyword, -1);

    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    CLUE_KEYWORD_COLUMN, keyword, CLUE_VALUE_COLUMN, new_text, -1);

    commit_changes (ui);
}

static void
clue_add_clicked (GtkButton *button, UIData *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    gchar *new_clue = NULL;
    GtkTreeViewColumn *focus_col;
    GtkTreePath *path;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    gtk_tree_model_foreach (model, (GtkTreeModelForeachFunc) clue_foreach_check_isempty, ui);

    /* Disconnect from signal so that we can create an empty row */
    g_signal_handlers_disconnect_matched(G_OBJECT(model), G_SIGNAL_MATCH_FUNC, 0, 0, NULL, clue_check_isempty, ui);

    /* TODO : Trim and check for blank strings */
    new_clue = g_strdup ("");
    gtk_list_store_append (GTK_LIST_STORE (model), &iter);
    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    CLUE_KEYWORD_COLUMN, new_clue, CLUE_VALUE_COLUMN, new_clue, -1);

    focus_col = gtk_tree_view_get_column (GTK_TREE_VIEW (ui->treeview), CLUE_KEYWORD_COLUMN);
    path = gtk_tree_model_get_path (model, &iter);

    if (path) {
        gtk_tree_view_set_cursor (GTK_TREE_VIEW (ui->treeview), path, focus_col, TRUE);
        gtk_tree_view_row_activated(GTK_TREE_VIEW(ui->treeview), path, focus_col);
        gtk_tree_path_free (path);
    }

    /* We have done our job, connect back to the signal */
    g_signal_connect(G_OBJECT(model), "row-changed", G_CALLBACK(clue_check_isempty), ui);
}

static void
clue_remove_clicked (GtkButton *button, UIData *ui)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;
    GtkTreePath *path;
    gboolean valid;
    gint len;

    valid = FALSE;
    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;

    /* Get the path and move to the previous node :) */
    path = gtk_tree_model_get_path (model, &iter);
    if (path)
        valid = gtk_tree_path_prev(path);

    gtk_list_store_remove (GTK_LIST_STORE (model), &iter);

    len = gtk_tree_model_iter_n_children (model, NULL);
    if (len > 0) {
        if (gtk_list_store_iter_is_valid (GTK_LIST_STORE(model), &iter)) {
            gtk_tree_selection_select_iter (selection, &iter);
        } else {
            if (path && valid) {
                gtk_tree_model_get_iter(model, &iter, path);
                gtk_tree_selection_select_iter (selection, &iter);
            }
        }
    } else {
        gtk_widget_set_sensitive (ui->clue_edit, FALSE);
        gtk_widget_set_sensitive (ui->clue_remove, FALSE);
    }

    gtk_widget_grab_focus(ui->treeview);
    gtk_tree_path_free (path);

    commit_changes (ui);
}

static void
clue_edit_clicked (GtkButton *button, UIData *ui)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;
    GtkTreeViewColumn *focus_col;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;

    focus_col = gtk_tree_view_get_column (GTK_TREE_VIEW (ui->treeview), CLUE_KEYWORD_COLUMN);
    path = gtk_tree_model_get_path (model, &iter);

    if (path) {
        gtk_tree_view_set_cursor (GTK_TREE_VIEW (ui->treeview), path, focus_col, TRUE);
        gtk_tree_path_free (path);
    }
}

GtkWidget *
e_plugin_lib_get_configure_widget (EPlugin *epl)
{
    GtkCellRenderer *renderer_key, *renderer_value;
    GtkTreeSelection *selection;
    GtkTreeIter iter;
    GConfClient *gconf = gconf_client_get_default();
    GtkWidget *hbox;
    GSList *clue_list = NULL, *list;
    GtkTreeModel *model;

    UIData *ui = g_new0 (UIData, 1);

    gchar *gladefile;

    gladefile = g_build_filename (EVOLUTION_PLUGINDIR,
            "templates.glade",
            NULL);
    ui->xml = glade_xml_new (gladefile, "templates_configuration_box", NULL);
    g_free (gladefile);

    ui->gconf = gconf_client_get_default ();

    ui->treeview = glade_xml_get_widget (ui->xml, "clue_treeview");

    ui->store = gtk_list_store_new (CLUE_N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING);

    gtk_tree_view_set_model (GTK_TREE_VIEW (ui->treeview), GTK_TREE_MODEL (ui->store));

    renderer_key = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (ui->treeview), -1, _("Keywords"),
            renderer_key, "text", CLUE_KEYWORD_COLUMN, NULL);
    g_object_set (G_OBJECT (renderer_key), "editable", TRUE, NULL);
    g_signal_connect(renderer_key, "edited", (GCallback) key_cell_edited_callback, ui);

    renderer_value = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (ui->treeview), -1, _("Values"),
            renderer_value, "text", CLUE_VALUE_COLUMN, NULL);
    g_object_set (G_OBJECT (renderer_value), "editable", TRUE, NULL);
    g_signal_connect(renderer_value, "edited", (GCallback) value_cell_edited_callback, ui);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
    g_signal_connect (G_OBJECT (selection), "changed", G_CALLBACK (selection_changed), ui);
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (ui->treeview), TRUE);

    ui->clue_add = glade_xml_get_widget (ui->xml, "clue_add");
    g_signal_connect (G_OBJECT (ui->clue_add), "clicked", G_CALLBACK (clue_add_clicked), ui);

    ui->clue_remove = glade_xml_get_widget (ui->xml, "clue_remove");
    g_signal_connect (G_OBJECT (ui->clue_remove), "clicked", G_CALLBACK (clue_remove_clicked), ui);
    gtk_widget_set_sensitive (ui->clue_remove, FALSE);

    ui->clue_edit = glade_xml_get_widget (ui->xml, "clue_edit");
    g_signal_connect (G_OBJECT (ui->clue_edit), "clicked", G_CALLBACK (clue_edit_clicked), ui);
    gtk_widget_set_sensitive (ui->clue_edit, FALSE);

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    g_signal_connect(G_OBJECT(model), "row-changed", G_CALLBACK(clue_check_isempty), ui);

    /* Populate tree view with values from gconf */
    clue_list = gconf_client_get_list ( gconf, GCONF_KEY_TEMPLATE_PLACEHOLDERS, GCONF_VALUE_STRING, NULL );

    for (list = clue_list; list; list = g_slist_next (list)) {
        gchar **temp = g_strsplit (list->data, "=", 2);
        gtk_list_store_append (ui->store, &iter);
        gtk_list_store_set (ui->store, &iter, CLUE_KEYWORD_COLUMN, temp[0], CLUE_VALUE_COLUMN, temp[1], -1);
        g_strfreev(temp);
    }

    if (clue_list) {
        g_slist_foreach (clue_list, (GFunc) g_free, NULL);
        g_slist_free (clue_list);
    }

    /* Add the list here */

    hbox = gtk_vbox_new (FALSE, 0);

    gtk_box_pack_start (GTK_BOX (hbox), glade_xml_get_widget (ui->xml, "templates_configuration_box"), TRUE, TRUE, 0);

    /* to let free data properly on destroy of configuration widget */
    g_object_set_data_full (G_OBJECT (hbox), "myui-data", ui, destroy_ui_data);

    return hbox;
}

/* borrowed from plugins/mail-to-task/ */
static gchar *
get_content (CamelMimeMessage *message)
{
    CamelDataWrapper *content;
    CamelStream *mem;
    CamelContentType *type;
    CamelMimePart *mime_part = CAMEL_MIME_PART (message);
    gchar *str, *convert_str = NULL;
    gsize bytes_read, bytes_written;
    gint count = 2;

    content = camel_medium_get_content_object ((CamelMedium *) message);
    if (!content)
        return NULL;

    /* Get non-multipart content from multipart message. */
    while (CAMEL_IS_MULTIPART (content) && count > 0) {
        mime_part = camel_multipart_get_part (CAMEL_MULTIPART (content), 0);
        content = camel_medium_get_content_object (CAMEL_MEDIUM (mime_part));
        count--;
    }

    if (!mime_part)
        return NULL;

    type = camel_mime_part_get_content_type (mime_part);
    if (!camel_content_type_is (type, "text", "plain"))
        return NULL;

    mem = camel_stream_mem_new ();
    camel_data_wrapper_decode_to_stream (content, mem);

    str = g_strndup ((const gchar *)((CamelStreamMem *) mem)->buffer->data, ((CamelStreamMem *) mem)->buffer->len);
    camel_object_unref (mem);

    /* convert to UTF-8 string */
    if (str && content->mime_type->params && content->mime_type->params->value) {
        convert_str = g_convert (str, strlen (str),
                "UTF-8", content->mime_type->params->value,
                &bytes_read, &bytes_written, NULL);
    }

    if (convert_str) {
        g_free (str);
        return convert_str;
    }
    else
        return str;

}

static void
action_reply_with_template_cb (GtkAction *action,
                               CamelMimeMessage *message)
{
    CamelMimeMessage *new, *template;
    CamelFolder *folder;
    struct _camel_header_raw *header;
    gchar *cont;

    folder = e_mail_local_get_folder (E_MAIL_FOLDER_TEMPLATES);
    template = g_object_get_data (G_OBJECT (action), "template");

    /* The new message we are creating */
    new = camel_mime_message_new();

    /* Add the headers from the message we are replying to, so CC and that
     * stuff is preserved. */
    header = ((CamelMimePart *)message)->headers;
    while (header) {
        if (g_ascii_strncasecmp (header->name, "content-", 8) != 0) {
            camel_medium_add_header((CamelMedium *) new,
                    header->name,
                    header->value);
        }
        header = header->next;
    }

    camel_mime_part_set_encoding((CamelMimePart *) new, CAMEL_TRANSFER_ENCODING_8BIT);

    /* Get the template content. */
    cont = get_content (template);

    /* Set the To: field to the same To: field of the message we are replying to. */
    camel_mime_message_set_recipients (new, CAMEL_RECIPIENT_TYPE_TO,
            camel_mime_message_get_from (message));

    /* Copy the CC and BCC from the template.*/
    camel_mime_message_set_recipients (new, CAMEL_RECIPIENT_TYPE_CC,
            camel_mime_message_get_recipients (template, CAMEL_RECIPIENT_TYPE_CC));

    camel_mime_message_set_recipients (new, CAMEL_RECIPIENT_TYPE_BCC,
            camel_mime_message_get_recipients (template, CAMEL_RECIPIENT_TYPE_BCC));

    camel_mime_part_set_content((CamelMimePart *)new,
            cont, (gint) g_utf8_strlen(cont, -1), "text");

    /* Create the composer */
    em_utils_edit_message (new, folder);

    camel_object_unref(new);
}

static void
build_template_menus_recurse (GtkUIManager *ui_manager,
                              GtkActionGroup *action_group,
                              const gchar *menu_path,
                              guint *action_count,
                              guint merge_id,
                              CamelFolderInfo *folder_info,
                              CamelMimeMessage *message)
{
    CamelStore *store;

    store = e_mail_local_get_store ();

    while (folder_info != NULL) {
        CamelFolder *folder;
        GPtrArray *uids;
        GtkAction *action;
        const gchar *action_label;
        gchar *action_name;
        gchar *path;
        guint ii;

        folder = camel_store_get_folder (
            store, folder_info->full_name, 0, NULL);

        action_name = g_strdup_printf (
            "templates-menu-%d", *action_count);
        *action_count = *action_count + 1;

        /* To avoid having a Templates dir, we ignore the top level */
        if (g_str_has_suffix (folder->name, "Templates"))
            action_label = _("Templates");
        else
            action_label = folder->name;

        action = gtk_action_new (
            action_name, action_label, NULL, NULL);

        gtk_action_group_add_action (action_group, action);

        gtk_ui_manager_add_ui (
            ui_manager, merge_id, menu_path, action_name,
            action_name, GTK_UI_MANAGER_MENU, FALSE);

        path = g_strdup_printf ("%s/%s", menu_path, action_name);

        g_object_unref (action);
        g_free (action_name);

        /* Add submenus, if any. */
        if (folder_info->child != NULL)
            build_template_menus_recurse (
                ui_manager, action_group,
                path, action_count, merge_id,
                folder_info->child, message);

        /* Get the UIDs for this folder and add them to the menu. */
        uids = camel_folder_get_uids (folder);
        for (ii = 0; ii < uids->len; ii++) {
            CamelMimeMessage *template;
            const gchar *uid = uids->pdata[ii];
            guint32 flags;

            /* If the UIDs is marked for deletion, skip it. */
            flags = camel_folder_get_message_flags (folder, uid);
            if (flags & CAMEL_MESSAGE_DELETED)
                continue;

            template = camel_folder_get_message (folder, uid, NULL);
            camel_object_ref (template);

            action_label =
                camel_mime_message_get_subject (template);
            if (action_label == NULL || *action_label == '\0')
                action_label = _("No Title");

            action_name = g_strdup_printf (
                "templates-item-%d", *action_count);
            *action_count = *action_count + 1;

            action = gtk_action_new (
                action_name, action_label, NULL, NULL);

            g_object_set_data_full (
                G_OBJECT (action), "template", template,
                (GDestroyNotify) camel_object_unref);

            g_signal_connect (
                action, "activate",
                G_CALLBACK (action_reply_with_template_cb),
                message);

            gtk_action_group_add_action (action_group, action);

            gtk_ui_manager_add_ui (
                ui_manager, merge_id, path, action_name,
                action_name, GTK_UI_MANAGER_MENUITEM, FALSE);

            g_object_unref (action);
            g_free (action_name);
        }
        camel_folder_free_uids (folder, uids);

        g_free (path);

        folder_info = folder_info->next;
    }
}

static void
action_template_cb (GtkAction *action,
                    EMsgComposer *composer)
{
    CamelMessageInfo *info;
    CamelMimeMessage *msg;
    CamelFolder *folder;

    /* Get the templates folder and all UIDs of the messages there. */
    folder = e_mail_local_get_folder (E_MAIL_FOLDER_TEMPLATES);

    msg = e_msg_composer_get_message_draft (composer);
    info = camel_message_info_new (NULL);

    /* FIXME: what's the ~0 for? :) */
    camel_message_info_set_flags (
        info, CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_DRAFT, ~0);

    mail_append_mail (folder, msg, info, NULL, composer);
}

static GtkActionEntry composer_entries[] = {

    { "template",
      GTK_STOCK_SAVE,
      N_("Save as _Template"),
      "<Shift><Control>t",
      N_("Save as Template"),
      G_CALLBACK (action_template_cb) }
};

static void
update_actions_cb (EShellView *shell_view)
{
    EShellContent *shell_content;
    EShellWindow *shell_window;
    GtkActionGroup *action_group;
    GtkUIManager *ui_manager;
    MessageList *message_list;
    CamelMimeMessage *message;
    CamelFolderInfo *folder_info;
    CamelFolder *folder;
    CamelStore *store;
    EMailReader *reader;
    GPtrArray *uids;
    guint action_count = 0;
    guint merge_id;
    gpointer data;

    shell_content = e_shell_view_get_shell_content (shell_view);
    shell_window = e_shell_view_get_shell_window (shell_view);

    ui_manager = e_shell_window_get_ui_manager (shell_window);
    action_group = e_lookup_action_group (ui_manager, "templates");
    data = g_object_get_data (G_OBJECT (action_group), "merge-id");
    merge_id = GPOINTER_TO_UINT (data);
    g_return_if_fail (merge_id > 0);

    gtk_ui_manager_remove_ui (ui_manager, merge_id);
    e_action_group_remove_all_actions (action_group);

    if (!plugin_enabled)
        return;

    reader = E_MAIL_READER (shell_content);
    message_list = e_mail_reader_get_message_list (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    if (uids->len != 1)
        goto exit;

    /* This is the source message to use in replying with a template. */
    message = camel_folder_get_message (folder, uids->pdata[0], NULL);

    /* Now recursively build template submenus in the pop-up menu. */

    store = e_mail_local_get_store ();
    folder = e_mail_local_get_folder (E_MAIL_FOLDER_TEMPLATES);

    folder_info = camel_store_get_folder_info (
        store, folder->full_name,
        CAMEL_STORE_FOLDER_INFO_RECURSIVE |
        CAMEL_STORE_FOLDER_INFO_FAST, NULL);

    build_template_menus_recurse (
        ui_manager, action_group,
        "/mail-message-popup/mail-message-templates",
        &action_count, merge_id, folder_info, message);

exit:
    em_utils_uids_free (uids);
}

static gboolean
init_composer_actions (GtkUIManager *ui_manager,
                       EMsgComposer *composer)
{
    GtkhtmlEditor *editor;

    editor = GTKHTML_EDITOR (composer);

    /* Add actions to the "composer" action group. */
    gtk_action_group_add_actions (
        gtkhtml_editor_get_action_group (editor, "composer"),
        composer_entries, G_N_ELEMENTS (composer_entries), composer);

    return TRUE;
}

static gboolean
init_shell_actions (GtkUIManager *ui_manager,
                    EShellWindow *shell_window)
{
    EShellView *shell_view;
    GtkActionGroup *action_group;
    guint merge_id;

    shell_view = e_shell_window_get_shell_view (shell_window, "mail");

    /* This is where we keep dynamically-built menu items. */
    e_shell_window_add_action_group (shell_window, "templates");
    action_group = e_lookup_action_group (ui_manager, "templates");

    merge_id = gtk_ui_manager_new_merge_id (ui_manager);

    g_object_set_data (
        G_OBJECT (action_group), "merge-id",
        GUINT_TO_POINTER (merge_id));

    g_signal_connect (
        shell_view, "update-actions",
        G_CALLBACK (update_actions_cb), NULL);
}

gboolean
e_plugin_ui_init (GtkUIManager *ui_manager,
                  GObject *object)
{
    /* XXX This is a scenario I hadn't considered when designing
     *     EPluginUI: two different UI manager IDs with different
     *     closures sharing the same plugin entry point.  We know
     *     the closures are both GObjects so we query the type.
     *     Awkward, but it should work for now. */

    if (E_IS_MSG_COMPOSER (object))
        return init_composer_actions (
            ui_manager, E_MSG_COMPOSER (object));

    if (E_IS_SHELL_WINDOW (object))
        return init_shell_actions (
            ui_manager, E_SHELL_WINDOW (object));

    return FALSE;
}

gint
e_plugin_lib_enable (EPlugin *plugin,
                     gboolean enabled)
{
    plugin_enabled = enabled;

    return 0;
}