Sylpheed

/*

 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client

 * Copyright (C) 1999-2008 Hiroyuki Yamamoto

 *

 * 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.

 */

#ifdef HAVE_CONFIG_H

#  include "config.h"

#endif

#include <glib.h>

#include <glib/gi18n.h>

#include <gdk/gdkkeysyms.h>

#include <gdk/gdk.h>

#include <gtk/gtk.h>

#include <stdlib.h>

#include <string.h>

#include <stdarg.h>

#ifdef G_OS_WIN32

#  include <pango/pangowin32.h>

#endif

#include "gtkutils.h"

#include "utils.h"

#include "codeconv.h"

#include "menu.h"

gboolean gtkut_get_str_size(GtkWidget *widget, const gchar *str,

                            gint *width, gint *height)

{

        PangoLayout *layout;

        g_return_val_if_fail(GTK_IS_WIDGET(widget), FALSE);

        layout = gtk_widget_create_pango_layout(widget, str);

        g_return_val_if_fail(layout, FALSE);

        pango_layout_get_pixel_size(layout, width, height);

        g_object_unref(layout);

        return TRUE;

}

gboolean gtkut_get_font_size(GtkWidget *widget, gint *width, gint *height)

{

        const gchar *str = "Abcdef";

        gboolean ret;

        ret = gtkut_get_str_size(widget, str, width, height);

        if (ret && width)

                *width = *width / g_utf8_strlen(str, -1);

        return ret;

}

PangoFontDescription *gtkut_get_default_font_desc(void)

{

        static PangoFontDescription *font_desc = NULL;

        if (!font_desc) {

                GtkWidget *window;

                window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

                gtk_widget_ensure_style(window);

                font_desc = pango_font_description_copy

                        (window->style->font_desc);

                gtk_object_sink(GTK_OBJECT(window));

        }

        return pango_font_description_copy(font_desc);

}

void gtkut_widget_set_small_font_size(GtkWidget *widget)

{

        PangoFontDescription *font_desc;

        gint size;

        g_return_if_fail(widget != NULL);

        g_return_if_fail(widget->style != NULL);

        font_desc = gtkut_get_default_font_desc();

        size = pango_font_description_get_size(font_desc);

        pango_font_description_set_size(font_desc, size * PANGO_SCALE_SMALL);

        gtk_widget_modify_font(widget, font_desc);

        pango_font_description_free(font_desc);

}

gboolean gtkut_font_can_load(const gchar *str)

{

#ifdef G_OS_WIN32

        PangoFontDescription *desc;

        PangoContext *context;

        PangoFont *font;

        gboolean can_load = FALSE;

        desc = pango_font_description_from_string(str);

        if (desc) {

                context = pango_win32_get_context();

                font = pango_context_load_font(context, desc);

                if (font) {

                        can_load = TRUE;

                        g_object_unref(font);

                }

                g_object_unref(context);

                pango_font_description_free(desc);

        }

        return can_load;

#else

        return FALSE;

#endif

}

void gtkut_convert_int_to_gdk_color(gint rgbvalue, GdkColor *color)

{

        g_return_if_fail(color != NULL);

        color->pixel = 0L;

        color->red   = (int) (((gdouble)((rgbvalue & 0xff0000) >> 16) / 255.0) * 65535.0);

        color->green = (int) (((gdouble)((rgbvalue & 0x00ff00) >>  8) / 255.0) * 65535.0);

        color->blue  = (int) (((gdouble) (rgbvalue & 0x0000ff)        / 255.0) * 65535.0);

}

static gboolean reverse_order = FALSE;

void gtkut_stock_button_set_set_reverse(gboolean reverse)

{

        reverse_order = reverse;

}

void gtkut_stock_button_set_create(GtkWidget **bbox,

                                   GtkWidget **button1, const gchar *label1,

                                   GtkWidget **button2, const gchar *label2,

                                   GtkWidget **button3, const gchar *label3)

{

        g_return_if_fail(bbox != NULL);

        g_return_if_fail(button1 != NULL);

        *bbox = gtk_hbutton_box_new();

        gtk_button_box_set_layout(GTK_BUTTON_BOX(*bbox), GTK_BUTTONBOX_END);

        gtk_box_set_spacing(GTK_BOX(*bbox), 6);

        if (button3) {

                *button3 = gtk_button_new_from_stock(label3);

                GTK_WIDGET_SET_FLAGS(*button3, GTK_CAN_DEFAULT);

                gtk_box_pack_start(GTK_BOX(*bbox), *button3, FALSE, FALSE, 0);

                gtk_widget_show(*button3);

        }

        if (button2) {

                *button2 = gtk_button_new_from_stock(label2);

                GTK_WIDGET_SET_FLAGS(*button2, GTK_CAN_DEFAULT);

                gtk_box_pack_start(GTK_BOX(*bbox), *button2, FALSE, FALSE, 0);

                gtk_widget_show(*button2);

        }

        *button1 = gtk_button_new_from_stock(label1);

        GTK_WIDGET_SET_FLAGS(*button1, GTK_CAN_DEFAULT);

        gtk_box_pack_start(GTK_BOX(*bbox), *button1, FALSE, FALSE, 0);

        gtk_widget_show(*button1);

        if (reverse_order)

                gtkut_box_set_reverse_order(GTK_BOX(*bbox), TRUE);

}

void gtkut_box_set_reverse_order(GtkBox *box, gboolean reverse)

{

        GList *cur;

        GList *new_order = NULL;

        gint pos = 0;

        gboolean is_reversed;

        g_return_if_fail(box != NULL);

        is_reversed = GPOINTER_TO_INT

                (g_object_get_data(G_OBJECT(box), "reverse-order"));

        if (is_reversed == reverse)

                return;

        g_object_set_data(G_OBJECT(box), "reverse-order",

                          GINT_TO_POINTER(reverse));

        for (cur = box->children; cur != NULL; cur = cur->next) {

                GtkBoxChild *cinfo = cur->data;

                new_order = g_list_prepend(new_order, cinfo->widget);

        }

        for (cur = new_order; cur != NULL; cur = cur->next) {

                GtkWidget *child = cur->data;

                gtk_box_reorder_child(box, child, pos++);

        }

        g_list_free(new_order);

}

static void combo_button_size_request(GtkWidget *widget,

                                      GtkRequisition *requisition,

                                      gpointer data)

{

        ComboButton *combo = (ComboButton *)data;

        if (combo->arrow->allocation.height != requisition->height)

                gtk_widget_set_size_request(combo->arrow,

                                            -1, requisition->height);

}

static void combo_button_enter(GtkWidget *widget, gpointer data)

{

        ComboButton *combo = (ComboButton *)data;

        if (GTK_WIDGET_STATE(combo->arrow) != GTK_STATE_PRELIGHT) {

                gtk_widget_set_state(combo->arrow, GTK_STATE_PRELIGHT);

                gtk_widget_queue_draw(combo->arrow);

        }

        if (GTK_WIDGET_STATE(combo->button) != GTK_STATE_PRELIGHT) {

                gtk_widget_set_state(combo->button, GTK_STATE_PRELIGHT);

                gtk_widget_queue_draw(combo->button);

        }

}

static void combo_button_leave(GtkWidget *widget, gpointer data)

{

        ComboButton *combo = (ComboButton *)data;

        if (GTK_WIDGET_STATE(combo->arrow) != GTK_STATE_NORMAL) {

                gtk_widget_set_state(combo->arrow, GTK_STATE_NORMAL);

                gtk_widget_queue_draw(combo->arrow);

        }

        if (GTK_WIDGET_STATE(combo->button) != GTK_STATE_NORMAL) {

                gtk_widget_set_state(combo->button, GTK_STATE_NORMAL);

                gtk_widget_queue_draw(combo->button);

        }

}

static gint combo_button_arrow_pressed(GtkWidget *widget, GdkEventButton *event,

                                       gpointer data)

{

        ComboButton *combo = (ComboButton *)data;

        if (!event) return FALSE;

        gtk_menu_popup(GTK_MENU(combo->menu), NULL, NULL,

                       menu_button_position, combo->button,

                       event->button, event->time);

        return TRUE;

}

static void combo_button_destroy(GtkWidget *widget, gpointer data)

{

        ComboButton *combo = (ComboButton *)data;

        gtk_object_destroy(GTK_OBJECT(combo->factory));

        g_free(combo);

}

ComboButton *gtkut_combo_button_create(GtkWidget *button,

                                       GtkItemFactoryEntry *entries,

                                       gint n_entries, const gchar *path,

                                       gpointer data)

{

        ComboButton *combo;

        GtkWidget *arrow;

        combo = g_new0(ComboButton, 1);

        combo->arrow = gtk_button_new();

        arrow = gtk_arrow_new(GTK_ARROW_DOWN, GTK_SHADOW_OUT);

        gtk_widget_set_size_request(arrow, 7, -1);

        gtk_container_add(GTK_CONTAINER(combo->arrow), arrow);

        GTK_WIDGET_UNSET_FLAGS(combo->arrow, GTK_CAN_FOCUS);

        gtk_widget_show_all(combo->arrow);

        combo->button = button;

        combo->menu = menu_create_items(entries, n_entries, path,

                                        &combo->factory, data);

        combo->data = data;

        g_signal_connect(G_OBJECT(combo->button), "size_request",

                         G_CALLBACK(combo_button_size_request), combo);

#if 0

        g_signal_connect(G_OBJECT(combo->button), "enter",

                         G_CALLBACK(combo_button_enter), combo);

        g_signal_connect(G_OBJECT(combo->button), "leave",

                         G_CALLBACK(combo_button_leave), combo);

#endif

        g_signal_connect(G_OBJECT(combo->arrow), "enter",

                         G_CALLBACK(combo_button_enter), combo);

        g_signal_connect(G_OBJECT(combo->arrow), "leave",

                         G_CALLBACK(combo_button_leave), combo);

        g_signal_connect(G_OBJECT(combo->arrow), "button_press_event",

                         G_CALLBACK(combo_button_arrow_pressed), combo);

        g_signal_connect(G_OBJECT(combo->arrow), "destroy",

                         G_CALLBACK(combo_button_destroy), combo);

        return combo;

}

gint gtkut_ctree_get_nth_from_node(GtkCTree *ctree, GtkCTreeNode *node)

{

        g_return_val_if_fail(ctree != NULL, -1);

        g_return_val_if_fail(node != NULL, -1);

        return g_list_position(GTK_CLIST(ctree)->row_list, (GList *)node);

}

void gtkut_ctree_set_focus_row(GtkCTree *ctree, GtkCTreeNode *node)

{

        gtkut_clist_set_focus_row(GTK_CLIST(ctree),

                                  gtkut_ctree_get_nth_from_node(ctree, node));

}

void gtkut_clist_set_focus_row(GtkCList *clist, gint row)

{

        clist->focus_row = row;

        GTKUT_CTREE_REFRESH(clist);

}

#ifdef G_OS_WIN32

static void vadjustment_changed(GtkAdjustment *adj, gpointer data)

{

        GtkWidget *widget = GTK_WIDGET(data);

        gtk_widget_queue_draw(widget);

}

#endif

void gtkut_clist_set_redraw(GtkCList *clist)

{

#ifdef G_OS_WIN32

        if (clist->vadjustment) {

                g_signal_connect(G_OBJECT(clist->vadjustment), "changed",

                                 G_CALLBACK(vadjustment_changed), clist);

        }

#endif

}

gboolean gtkut_tree_model_next(GtkTreeModel *model, GtkTreeIter *iter)

{

        GtkTreeIter iter_, parent;

        gboolean valid;

        if (gtk_tree_model_iter_children(model, &iter_, iter)) {

                *iter = iter_;

                return TRUE;

        }

        iter_ = *iter;

        if (gtk_tree_model_iter_next(model, &iter_)) {

                *iter = iter_;

                return TRUE;

        }

        iter_ = *iter;

        valid = gtk_tree_model_iter_parent(model, &parent, &iter_);

        while (valid) {

                iter_ = parent;

                if (gtk_tree_model_iter_next(model, &iter_)) {

                        *iter = iter_;

                        return TRUE;

                }

                iter_ = parent;

                valid = gtk_tree_model_iter_parent(model, &parent, &iter_);

        }

        return FALSE;

}

gboolean gtkut_tree_model_prev(GtkTreeModel *model, GtkTreeIter *iter)

{

        GtkTreeIter iter_, child, next, parent;

        GtkTreePath *path;

        gboolean found = FALSE;

        iter_ = *iter;

        path = gtk_tree_model_get_path(model, &iter_);

        if (gtk_tree_path_prev(path)) {

                gtk_tree_model_get_iter(model, &child, path);

                while (gtk_tree_model_iter_has_child(model, &child)) {

                        iter_ = child;

                        gtk_tree_model_iter_children(model, &child, &iter_);

                        next = child;

                        while (gtk_tree_model_iter_next(model, &next))

                                child = next;

                }

                *iter = child;

                found = TRUE;

        } else if (gtk_tree_model_iter_parent(model, &parent, &iter_)) {

                *iter = parent;

                found = TRUE;

        }

        gtk_tree_path_free(path);

        return found;

}

gboolean gtkut_tree_model_get_iter_last(GtkTreeModel *model, GtkTreeIter *iter)

{

        GtkTreeIter iter_, child, next;

        if (!gtk_tree_model_get_iter_first(model, &iter_))

                return FALSE;

        for (;;) {

                next = iter_;

                while (gtk_tree_model_iter_next(model, &next))

                        iter_ = next;

                if (gtk_tree_model_iter_children(model, &child, &iter_))

                        iter_ = child;

                else

                        break;

        }

        *iter = iter_;

        return TRUE;

}

gboolean gtkut_tree_model_find_by_column_data(GtkTreeModel *model,

                                              GtkTreeIter *iter,

                                              GtkTreeIter *start,

                                              gint col, gpointer data)

{

        gboolean valid;

        GtkTreeIter iter_;

        gpointer store_data;

        if (start) {

                gtk_tree_model_get(model, start, col, &store_data, -1);

                if (store_data == data) {

                        *iter = *start;

                        return TRUE;

                }

                valid = gtk_tree_model_iter_children(model, &iter_, start);

        } else

                valid = gtk_tree_model_get_iter_first(model, &iter_);

        while (valid) {

                if (gtkut_tree_model_find_by_column_data

                        (model, iter, &iter_, col, data)) {

                        return TRUE;

                }

                valid = gtk_tree_model_iter_next(model, &iter_);

        }

        return FALSE;

}

void gtkut_tree_model_foreach(GtkTreeModel *model, GtkTreeIter *start,

                              GtkTreeModelForeachFunc func, gpointer user_data)

{

        gboolean valid = TRUE;

        GtkTreeIter iter;

        GtkTreePath *path;

        g_return_if_fail(func != NULL);

        if (!start) {

                gtk_tree_model_foreach(model, func, user_data);

                return;

        }

        path = gtk_tree_model_get_path(model, start);

        func(model, path, start, user_data);

        gtk_tree_path_free(path);

        valid = gtk_tree_model_iter_children(model, &iter, start);

        while (valid) {

                gtkut_tree_model_foreach(model, &iter, func, user_data);

                valid = gtk_tree_model_iter_next(model, &iter);

        }

}

gboolean gtkut_tree_row_reference_get_iter(GtkTreeModel *model,

                                           GtkTreeRowReference *ref,

                                           GtkTreeIter *iter)

{

        GtkTreePath *path;

        gboolean valid = FALSE;

        if (ref) {

                path = gtk_tree_row_reference_get_path(ref);

                if (path) {

                        valid = gtk_tree_model_get_iter(model, iter, path);

                        gtk_tree_path_free(path);

                }

        }

        return valid;

}

gboolean gtkut_tree_row_reference_equal(GtkTreeRowReference *ref1,

                                        GtkTreeRowReference *ref2)

{

        GtkTreePath *path1, *path2;

        gint result;

        if (ref1 == NULL || ref2 == NULL)

                return FALSE;

        path1 = gtk_tree_row_reference_get_path(ref1);

        if (!path1)

                return FALSE;

        path2 = gtk_tree_row_reference_get_path(ref2);

        if (!path2) {

                gtk_tree_path_free(path1);

                return FALSE;

        }

        result = gtk_tree_path_compare(path1, path2);

        gtk_tree_path_free(path2);

        gtk_tree_path_free(path1);

        return (result == 0);

}

void gtkut_tree_sortable_unset_sort_column_id(GtkTreeSortable *sortable)

{

#if GTK_CHECK_VERSION(2, 6, 0)

        gtk_tree_sortable_set_sort_column_id

                (sortable, GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID,

                 GTK_SORT_ASCENDING);

#else

        GtkTreeStore *store = GTK_TREE_STORE(sortable);

        g_return_if_fail(GTK_IS_TREE_STORE(sortable));

        if (store->sort_column_id == -2 && store->order == GTK_SORT_ASCENDING)

                return;

        store->sort_column_id = -2;

        store->order = GTK_SORT_ASCENDING;

        gtk_tree_sortable_sort_column_changed(sortable);

#endif

}

gboolean gtkut_tree_view_find_collapsed_parent(GtkTreeView *treeview,

                                               GtkTreeIter *parent,

                                               GtkTreeIter *iter)

{

        GtkTreeModel *model;

        GtkTreeIter iter_, parent_;

        GtkTreePath *path;

        gboolean valid;

        if (!iter) return FALSE;

        model = gtk_tree_view_get_model(treeview);

        valid = gtk_tree_model_iter_parent(model, &parent_, iter);

        while (valid) {

                path = gtk_tree_model_get_path(model, &parent_);

                if (!gtk_tree_view_row_expanded(treeview, path)) {

                        *parent = parent_;

                        gtk_tree_path_free(path);

                        return TRUE;

                }

                gtk_tree_path_free(path);

                iter_ = parent_;

                valid = gtk_tree_model_iter_parent(model, &parent_, &iter_);

        }

        return FALSE;

}

void gtkut_tree_view_expand_parent_all(GtkTreeView *treeview, GtkTreeIter *iter)

{

        GtkTreeModel *model;

        GtkTreeIter parent;

        GtkTreePath *path;

        model = gtk_tree_view_get_model(treeview);

        if (gtk_tree_model_iter_parent(model, &parent, iter)) {

                path = gtk_tree_model_get_path(model, &parent);

                gtk_tree_view_expand_to_path(treeview, path);

                gtk_tree_path_free(path);

        }

}

#define SCROLL_EDGE_SIZE 15

/* borrowed from gtktreeview.c */

void gtkut_tree_view_vertical_autoscroll(GtkTreeView *treeview)

{

        GdkRectangle visible_rect;

        gint y, wy;

        gint offset;

        GtkAdjustment *vadj;

        gfloat value;

        gdk_window_get_pointer(gtk_tree_view_get_bin_window(treeview),

                               NULL, &wy, NULL);

        gtk_tree_view_widget_to_tree_coords(treeview, 0, wy, NULL, &y);

        gtk_tree_view_get_visible_rect(treeview, &visible_rect);

        /* see if we are near the edge. */

        offset = y - (visible_rect.y + 2 * SCROLL_EDGE_SIZE);

        if (offset > 0) {

                offset = y - (visible_rect.y + visible_rect.height - 2 * SCROLL_EDGE_SIZE);

                if (offset < 0)

                        return;

        }

        vadj = gtk_tree_view_get_vadjustment(treeview);

        value = CLAMP(vadj->value + offset, 0.0, vadj->upper - vadj->page_size);

        gtk_adjustment_set_value(vadj, value);

}

/* modified version of gtk_tree_view_scroll_to_cell */

void gtkut_tree_view_scroll_to_cell(GtkTreeView *treeview, GtkTreePath *path,

                                    gboolean align_center)

{

        GdkRectangle cell_rect;

        GdkRectangle vis_rect;

        gint dest_x, dest_y;

        gint margin = 0;

        if (!path)

                return;

        gtk_tree_view_get_cell_area(treeview, path, NULL, &cell_rect);

        gtk_tree_view_widget_to_tree_coords(treeview, cell_rect.x, cell_rect.y,

                                            NULL, &(cell_rect.y));

        gtk_tree_view_get_visible_rect(treeview, &vis_rect);

        dest_x = vis_rect.x;

        dest_y = vis_rect.y;

        /* add margin */

        if (cell_rect.height * 2 < vis_rect.height)

                margin = cell_rect.height + (align_center ? 0 : 2);

        if (cell_rect.y < vis_rect.y + margin) {

                if (align_center)

                        dest_y = cell_rect.y -

                                (vis_rect.height - cell_rect.height) / 2;

                else

                        dest_y = cell_rect.y - margin;

        }

        if (cell_rect.y + cell_rect.height >

                vis_rect.y + vis_rect.height - margin) {

                if (align_center)

                        dest_y = cell_rect.y -

                                (vis_rect.height - cell_rect.height) / 2;

                else

                        dest_y = cell_rect.y + cell_rect.height -

                                vis_rect.height + margin;

        }

        gtk_tree_view_scroll_to_point(treeview, dest_x, dest_y);

}

void gtkut_tree_view_fast_clear(GtkTreeView *treeview, GtkTreeStore *store)

{

#if GTK_CHECK_VERSION(2, 8, 0) && !GTK_CHECK_VERSION(2, 10, 0)

        gtk_tree_store_clear(store);

#else

        /* this is faster than above, but it seems to trigger crashes in

           GTK+ 2.8.x */

        gtk_tree_view_set_model(treeview, NULL);

        gtk_tree_store_clear(store);

        gtk_tree_view_set_model(treeview, GTK_TREE_MODEL(store));

#endif

}

void gtkut_combo_set_items(GtkCombo *combo, const gchar *str1, ...)

{

        va_list args;

        gchar *s;

        GList *combo_items = NULL;

        g_return_if_fail(str1 != NULL);

        combo_items = g_list_append(combo_items, (gpointer)str1);

        va_start(args, str1);

        s = va_arg(args, gchar*);

        while (s) {

                combo_items = g_list_append(combo_items, (gpointer)s);

                s = va_arg(args, gchar*);

        }

        va_end(args);

        gtk_combo_set_popdown_strings(combo, combo_items);

        g_list_free(combo_items);

}

gchar *gtkut_editable_get_selection(GtkEditable *editable)

{

        gint start_pos, end_pos;

        gboolean found;

        g_return_val_if_fail(GTK_IS_EDITABLE(editable), NULL);

        found = gtk_editable_get_selection_bounds(editable,

                                                  &start_pos, &end_pos);

        if (found)

                return gtk_editable_get_chars(editable, start_pos, end_pos);

        else

                return NULL;

}

void gtkut_editable_disable_im(GtkEditable *editable)

{

        g_return_if_fail(editable != NULL);

#if USE_XIM

        if (editable->ic) {

                gdk_ic_destroy(editable->ic);

                editable->ic = NULL;

        }

        if (editable->ic_attr) {

                gdk_ic_attr_destroy(editable->ic_attr);

                editable->ic_attr = NULL;

        }

#endif

}

void gtkut_entry_strip_text(GtkEntry *entry)

{

        gchar *text;

        gint len;

        text = gtk_editable_get_chars(GTK_EDITABLE(entry), 0, -1);

        len = strlen(text);

        g_strstrip(text);

        if (len > strlen(text))

                gtk_entry_set_text(entry, text);

        g_free(text);

}

void gtkut_container_remove(GtkContainer *container, GtkWidget *widget)

{

        gtk_container_remove(container, widget);

}

void gtkut_scrolled_window_reset_position(GtkScrolledWindow *window)

{

        GtkAdjustment *adj;

        adj = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(window));

        gtk_adjustment_set_value(adj, adj->lower);

        adj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(window));

        gtk_adjustment_set_value(adj, adj->lower);

}

gboolean gtkut_text_buffer_match_string(GtkTextBuffer *textbuf,

                                        const GtkTextIter *iter,

                                        gunichar *wcs, gint len,

                                        gboolean case_sens)

{

        GtkTextIter start_iter, end_iter;

        gchar *utf8str, *p;

        gint match_count;

        start_iter = end_iter = *iter;

        gtk_text_iter_forward_chars(&end_iter, len);

        utf8str = gtk_text_buffer_get_text(textbuf, &start_iter, &end_iter,

                                           FALSE);

        if (!utf8str) return FALSE;

        if ((gint)g_utf8_strlen(utf8str, -1) != len) {

                g_free(utf8str);

                return FALSE;

        }

        for (p = utf8str, match_count = 0;

             *p != '\0' && match_count < len;

             p = g_utf8_next_char(p), match_count++) {

                gunichar wc;

                wc = g_utf8_get_char(p);

                if (case_sens) {

                        if (wc != wcs[match_count])

                                break;

                } else {

                        if (g_unichar_tolower(wc) !=

                            g_unichar_tolower(wcs[match_count]))

                                break;

                }

        }

        g_free(utf8str);

        if (match_count == len)

                return TRUE;

        else

                return FALSE;

}

gboolean gtkut_text_buffer_find(GtkTextBuffer *buffer, const GtkTextIter *iter,

                                const gchar *str, gboolean case_sens,

                                GtkTextIter *match_pos)

{

        gunichar *wcs;

        gint len;

        glong items_read = 0, items_written = 0;

        GError *error = NULL;

        GtkTextIter iter_;

        gboolean found = FALSE;

        wcs = g_utf8_to_ucs4(str, -1, &items_read, &items_written, &error);

        if (error != NULL) {

                g_warning("An error occured while converting a string from UTF-8 to UCS-4: %s\n", error->message);

                g_error_free(error);

        }

        if (!wcs || items_written <= 0) return FALSE;

        len = (gint)items_written;

        iter_ = *iter;

        do {

                found = gtkut_text_buffer_match_string

                        (buffer, &iter_, wcs, len, case_sens);

                if (found) {

                        *match_pos = iter_;

                        break;

                }

        } while (gtk_text_iter_forward_char(&iter_));

        g_free(wcs);

        return found;

}

gboolean gtkut_text_buffer_find_backward(GtkTextBuffer *buffer,

                                         const GtkTextIter *iter,

                                         const gchar *str, gboolean case_sens,

                                         GtkTextIter *match_pos)

{

        gunichar *wcs;

        gint len;

        glong items_read = 0, items_written = 0;

        GError *error = NULL;

        GtkTextIter iter_;

        gboolean found = FALSE;

        wcs = g_utf8_to_ucs4(str, -1, &items_read, &items_written, &error);

        if (error != NULL) {

                g_warning("An error occured while converting a string from UTF-8 to UCS-4: %s\n", error->message);

                g_error_free(error);

        }

        if (!wcs || items_written <= 0) return FALSE;

        len = (gint)items_written;

        iter_ = *iter;

        while (gtk_text_iter_backward_char(&iter_)) {

                found = gtkut_text_buffer_match_string

                        (buffer, &iter_, wcs, len, case_sens);

                if (found) {

                        *match_pos = iter_;

                        break;

                }

        }

        g_free(wcs);

        return found;

}

#define MAX_TEXT_LINE_LEN        8190

void gtkut_text_buffer_insert_with_tag_by_name(GtkTextBuffer *buffer,

                                               GtkTextIter *iter,

                                               const gchar *text,

                                               gint len,

                                               const gchar *tag)

{

        if (len < 0)

                len = strlen(text);

        gtk_text_buffer_insert_with_tags_by_name

                (buffer, iter, text, len, tag, NULL);

        if (text[len - 1] != '\n') {

                /* somehow returns invalid value first (bug?),

                   so call it twice */

                gtk_text_iter_get_chars_in_line(iter);

                if (gtk_text_iter_get_chars_in_line(iter) > MAX_TEXT_LINE_LEN) {

                        gtk_text_buffer_insert_with_tags_by_name

                                (buffer, iter, "\n", 1, tag, NULL);

                }

        }

}

gchar *gtkut_text_view_get_selection(GtkTextView *textview)

{

        GtkTextBuffer *buffer;

        GtkTextIter start_iter, end_iter;

        gboolean found;

        g_return_val_if_fail(GTK_IS_TEXT_VIEW(textview), NULL);

        buffer = gtk_text_view_get_buffer(textview);

        found = gtk_text_buffer_get_selection_bounds(buffer,

                                                     &start_iter, &end_iter);

        if (found)

                return gtk_text_buffer_get_text(buffer, &start_iter, &end_iter,

                                                FALSE);

        else

                return NULL;

}

void gtkut_window_popup(GtkWidget *window)

{

        gint x, y, sx, sy, new_x, new_y;

        g_return_if_fail(window != NULL);

        g_return_if_fail(window->window != NULL);

        sx = gdk_screen_width();

        sy = gdk_screen_height();

        gdk_window_get_origin(window->window, &x, &y);

        new_x = x % sx; if (new_x < 0) new_x = 0;

        new_y = y % sy; if (new_y < 0) new_y = 0;