path: root/plugins/attachment-reminder/attachment-reminder.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:
 *      Johnny Jacob <jjohnny@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <gconf/gconf-client.h>

#include <e-util/e-util.h>
#include <e-util/e-config.h>
#include <mail/em-config.h>
#include <mail/em-event.h>

#include <e-util/e-alert-dialog.h>
#include <e-util/e-plugin.h>

#include <mail/em-utils.h>

#include "composer/e-msg-composer.h"
#include "composer/e-composer-actions.h"
#include "widgets/misc/e-attachment-view.h"
#include "widgets/misc/e-attachment-store.h"

#define GCONF_KEY_ATTACH_REMINDER_CLUES "/apps/evolution/mail/attachment_reminder_clues"
#define SIGNATURE "-- "

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

enum {
    CLUE_KEYWORD_COLUMN,
    CLUE_N_COLUMNS
};

gint e_plugin_lib_enable (EPlugin *ep, gint enable);
GtkWidget *e_plugin_lib_get_configure_widget (EPlugin *epl);

void org_gnome_evolution_attachment_reminder (EPlugin *ep, EMEventTargetComposer *t);
GtkWidget* org_gnome_attachment_reminder_config_option (struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data);

static gboolean ask_for_missing_attachment (EPlugin *ep, GtkWindow *widget);
static gboolean check_for_attachment_clues (gchar *msg);
static gboolean check_for_attachment (EMsgComposer *composer);
static gchar * strip_text_msg (gchar *msg);
static void commit_changes (UIData *ui);

static void  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);

gint
e_plugin_lib_enable (EPlugin *ep, gint enable)
{
    return 0;
}

void
org_gnome_evolution_attachment_reminder (EPlugin *ep, EMEventTargetComposer *t)
{
    GByteArray *raw_msg_barray;

    gchar *filtered_str = NULL;

    raw_msg_barray = e_msg_composer_get_raw_message_text (t->composer);

    if (!raw_msg_barray)
        return;

    raw_msg_barray = g_byte_array_append (raw_msg_barray, (const guint8 *)"", 1);

    filtered_str = strip_text_msg ((gchar *) raw_msg_barray->data);

    g_byte_array_free (raw_msg_barray, TRUE);

    /* Set presend_check_status for the composer*/
    if (check_for_attachment_clues (filtered_str) && !check_for_attachment (t->composer))
        if (!ask_for_missing_attachment (ep, (GtkWindow *)t->composer))
            g_object_set_data ((GObject *) t->composer, "presend_check_status", GINT_TO_POINTER(1));

    g_free (filtered_str);
}

static gboolean
ask_for_missing_attachment (EPlugin *ep, GtkWindow *window)
{
    GtkWidget *check = NULL;
    GtkDialog *dialog = NULL;
    GtkWidget *content_area;
    gint response;

    dialog = (GtkDialog*) e_alert_dialog_new_for_args (
        window, "org.gnome.evolution.plugins.attachment_reminder:attachment-reminder", NULL);

    /*Check buttons*/
    check = gtk_check_button_new_with_mnemonic (_("_Do not show this message again."));
    gtk_container_set_border_width((GtkContainer *)check, 12);
    content_area = gtk_dialog_get_content_area (dialog);
    gtk_box_pack_start (GTK_BOX (content_area), check, TRUE, TRUE, 0);
    gtk_widget_show (check);

    response = gtk_dialog_run ((GtkDialog *) dialog);

    if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(check)))
        e_plugin_enable (ep, FALSE);

    gtk_widget_destroy((GtkWidget *)dialog);

    if (response == GTK_RESPONSE_OK)
        gtk_action_activate (E_COMPOSER_ACTION_ATTACH (window));

    return response == GTK_RESPONSE_YES;
}

/* check for the clues */
static gboolean
check_for_attachment_clues (gchar *msg)
{
    /* TODO : Add more strings. RegEx ??? */
    GConfClient *gconf;
    GSList *clue_list = NULL, *list;
    gboolean ret_val = FALSE;
    guint msg_length;

    gconf = gconf_client_get_default ();

    /* Get the list from gconf */
    clue_list = gconf_client_get_list ( gconf, GCONF_KEY_ATTACH_REMINDER_CLUES, GCONF_VALUE_STRING, NULL );

    g_object_unref (gconf);

    msg_length = strlen (msg);
    for (list = clue_list;list && !ret_val;list=g_slist_next(list)) {
        gchar *needle = g_utf8_strdown (list->data, -1);
        if (g_strstr_len (msg, msg_length, needle)) {
            ret_val = TRUE;
        }
        g_free (needle);
    }

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

    return ret_val;
}

/* check for the any attachment */
static gboolean
check_for_attachment (EMsgComposer *composer)
{
    EAttachmentView *view;
    EAttachmentStore *store;

    view = e_msg_composer_get_attachment_view (composer);
    store = e_attachment_view_get_store (view);

    return (e_attachment_store_get_num_attachments (store) > 0);
}

static gchar *
strip_text_msg (gchar *msg)
{
    gchar **lines = g_strsplit ( msg, "\n", -1);
    gchar *stripped_msg = g_strdup (" ");
    guint i=0;
    gchar *temp;

    /* Note : HTML Signatures won't work. Depends on Bug #522784 */
    while (lines [i] && g_strcmp0 (lines[i], SIGNATURE)) {
        if (!g_str_has_prefix (g_strstrip(lines[i]), ">")) {
            temp = stripped_msg;

            stripped_msg = g_strconcat (" ", stripped_msg, lines[i], NULL);

            g_free (temp);
        }
        i++;
    }

    g_strfreev (lines);

    temp = g_utf8_strdown (stripped_msg, -1);
    g_free (stripped_msg);

    return temp;
}

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;

        gtk_tree_model_get (model, &iter, CLUE_KEYWORD_COLUMN, &keyword, -1);
        /* Check if the keyword is not empty */
        if ((keyword) && (g_utf8_strlen(g_strstrip(keyword), -1) > 0))
            clue_list = g_slist_append (clue_list, keyword);
        valid = gtk_tree_model_iter_next (model, &iter);
    }

    gconf_client_set_list (ui->gconf, GCONF_KEY_ATTACH_REMINDER_CLUES, 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
cell_edited_callback (GtkCellRendererText *cell,
              gchar               *path_string,
              gchar               *new_text,
              UIData             *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;

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

    gtk_tree_model_get_iter_from_string (model, &iter, path_string);

    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    CLUE_KEYWORD_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, -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);
    }
}

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->gconf);
    g_free (ui);
}

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

    GtkWidget *reminder_configuration_box;
    GtkWidget *clue_container;
    GtkWidget *scrolledwindow1;
    GtkWidget *clue_treeview;
    GtkWidget *vbuttonbox2;
    GtkWidget *clue_add;
    GtkWidget *clue_edit;
    GtkWidget *clue_remove;

    UIData *ui = g_new0 (UIData, 1);

    reminder_configuration_box = gtk_vbox_new (FALSE, 5);
    gtk_widget_show (reminder_configuration_box);
    gtk_widget_set_size_request (reminder_configuration_box, 385, 189);

    clue_container = gtk_hbox_new (FALSE, 6);
    gtk_widget_show (clue_container);
    gtk_box_pack_start (GTK_BOX (reminder_configuration_box), clue_container, TRUE, TRUE, 0);

    scrolledwindow1 = gtk_scrolled_window_new (NULL, NULL);
    gtk_widget_show (scrolledwindow1);
    gtk_box_pack_start (GTK_BOX (clue_container), scrolledwindow1, TRUE, TRUE, 0);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow1), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    clue_treeview = gtk_tree_view_new ();
    gtk_widget_show (clue_treeview);
    gtk_container_add (GTK_CONTAINER (scrolledwindow1), clue_treeview);
    gtk_container_set_border_width (GTK_CONTAINER (clue_treeview), 1);

    vbuttonbox2 = gtk_vbutton_box_new ();
    gtk_widget_show (vbuttonbox2);
    gtk_box_pack_start (GTK_BOX (clue_container), vbuttonbox2, FALSE, TRUE, 0);
    gtk_button_box_set_layout (GTK_BUTTON_BOX (vbuttonbox2), GTK_BUTTONBOX_START);
    gtk_box_set_spacing (GTK_BOX (vbuttonbox2), 6);

    clue_add = gtk_button_new_from_stock ("gtk-add");
    gtk_widget_show (clue_add);
    gtk_container_add (GTK_CONTAINER (vbuttonbox2), clue_add);
    gtk_widget_set_can_default (clue_add, TRUE);

    clue_edit = gtk_button_new_from_stock ("gtk-edit");
    gtk_widget_show (clue_edit);
    gtk_container_add (GTK_CONTAINER (vbuttonbox2), clue_edit);
    gtk_widget_set_can_default (clue_edit, TRUE);

    clue_remove = gtk_button_new_from_stock ("gtk-remove");
    gtk_widget_show (clue_remove);
    gtk_container_add (GTK_CONTAINER (vbuttonbox2), clue_remove);
    gtk_widget_set_can_default (clue_remove, TRUE);

    ui->gconf = gconf_client_get_default ();

    ui->treeview = clue_treeview;

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

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

    renderer = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (ui->treeview), -1, _("Keywords"),
            renderer, "text", CLUE_KEYWORD_COLUMN, NULL);
    g_object_set (G_OBJECT (renderer), "editable", TRUE, NULL);
    g_signal_connect(renderer, "edited", (GCallback) 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 = clue_add;
    g_signal_connect (G_OBJECT (ui->clue_add), "clicked", G_CALLBACK (clue_add_clicked), ui);

    ui->clue_remove = 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 = 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_ATTACH_REMINDER_CLUES, GCONF_VALUE_STRING, NULL );

    for (list = clue_list; list; list = g_slist_next (list)) {
        gtk_list_store_append (ui->store, &iter);
        gtk_list_store_set (ui->store, &iter, CLUE_KEYWORD_COLUMN, list->data, -1);
    }

    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), reminder_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;
}

/* Configuration in Mail Prefs Page goes here */

GtkWidget *
org_gnome_attachment_reminder_config_option (struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data)
{
    /* This function and the hook needs to be removed,
    once the configure code is thoroughly tested */

    return NULL;

}