src/ui_tree_edit.c

   1 /*
   2  * (SLIK) SimpLIstic sKin functions
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 - 2012 The Geeqie Team
   5  *
   6  * Author: John Ellis
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13 #ifdef HAVE_CONFIG_H
  14 #  include "config.h"
  15 #endif
  16 #include "intl.h"
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 #include <gtk/gtk.h>
  23 #include <gdk/gdkkeysyms.h>
  24
  25 #include "compat.h"
  26
  27 #include "ui_tree_edit.h"
  28
  29 /*
  30  *-------------------------------------------------------------------
  31  * cell popup editor
  32  *-------------------------------------------------------------------
  33  */
  34
  35 static void tree_edit_close(TreeEditData *ted)
  36 {
  37         gtk_grab_remove(ted->window);
  38         gdk_keyboard_ungrab(GDK_CURRENT_TIME);
  39         gdk_pointer_ungrab(GDK_CURRENT_TIME);
  40
  41         gtk_widget_destroy(ted->window);
  42
  43         g_free(ted->old_name);
  44         g_free(ted->new_name);
  45         gtk_tree_path_free(ted->path);
  46
  47         g_free(ted);
  48 }
  49
  50 static void tree_edit_do(TreeEditData *ted)
  51 {
  52         ted->new_name = g_strdup(gtk_entry_get_text(GTK_ENTRY(ted->entry)));
  53
  54         if (strcmp(ted->new_name, ted->old_name) != 0)
  55                 {
  56                 if (ted->edit_func)
  57                         {
  58                         if (ted->edit_func(ted, ted->old_name, ted->new_name, ted->edit_data))
  59                                 {
  60                                 /* hmm, should the caller be required to set text instead ? */
  61                                 }
  62                         }
  63                 }
  64 }
  65
  66 static gboolean tree_edit_click_end_cb(GtkWidget *widget, GdkEventButton *event, gpointer data)
  67 {
  68         TreeEditData *ted = data;
  69
  70         tree_edit_do(ted);
  71         tree_edit_close(ted);
  72
  73         return TRUE;
  74 }
  75
  76 static gboolean tree_edit_click_cb(GtkWidget *widget, GdkEventButton *event, gpointer data)
  77 {
  78         TreeEditData *ted = data;
  79         GdkWindow *window = gtk_widget_get_window(ted->window);
  80
  81         gint x, y;
  82         gint w, h;
  83
  84         gint xr, yr;
  85
  86         xr = (gint)event->x_root;
  87         yr = (gint)event->y_root;
  88
  89         gdk_window_get_origin(window, &x, &y);
  90         w = gdk_window_get_width(window);
  91         h = gdk_window_get_height(window);
  92
  93         if (xr < x || yr < y || xr > x + w || yr > y + h)
  94                 {
  95                 /* gobble the release event, so it does not propgate to an underlying widget */
  96                 g_signal_connect(G_OBJECT(ted->window), "button_release_event",
  97                                  G_CALLBACK(tree_edit_click_end_cb), ted);
  98                 return TRUE;
  99                 }
 100         return FALSE;
 101 }
 102
 103 static gboolean tree_edit_key_press_cb(GtkWidget *widget, GdkEventKey *event, gpointer data)
 104 {
 105         TreeEditData *ted = data;
 106
 107         switch (event->keyval)
 108                 {
 109                 case GDK_KEY_Return:
 110                 case GDK_KEY_KP_Enter:
 111                 case GDK_KEY_Tab:               /* ok, we are going to intercept the focus change
 112                                            from keyboard and act like return was hit */
 113                 case GDK_KEY_ISO_Left_Tab:
 114                 case GDK_KEY_Up:
 115                 case GDK_KEY_Down:
 116                 case GDK_KEY_KP_Up:
 117                 case GDK_KEY_KP_Down:
 118                 case GDK_KEY_KP_Left:
 119                 case GDK_KEY_KP_Right:
 120                         tree_edit_do(ted);
 121                         tree_edit_close(ted);
 122                         break;
 123                 case GDK_KEY_Escape:
 124                         tree_edit_close(ted);
 125                         break;
 126                 default:
 127                         break;
 128                 }
 129
 130         return FALSE;
 131 }
 132
 133 static gboolean tree_edit_by_path_idle_cb(gpointer data)
 134 {
 135         TreeEditData *ted = data;
 136         GdkRectangle rect;
 137         gint x, y, w, h;        /* geometry of cell within tree */
 138         gint wx, wy;            /* geometry of tree from root window */
 139         gint sx, sw;
 140
 141         gtk_tree_view_get_cell_area(ted->tree, ted->path, ted->column, &rect);
 142
 143         x = rect.x;
 144         y = rect.y;
 145         w = rect.width + 4;
 146         h = rect.height + 4;
 147
 148         if (gtk_tree_view_column_cell_get_position(ted->column, ted->cell, &sx, &sw))
 149                 {
 150                 x += sx;
 151                 w = MAX(w - sx, sw);
 152                 }
 153
 154         gdk_window_get_origin(gtk_tree_view_get_bin_window(ted->tree), &wx, &wy);
 155
 156         x += wx - 2; /* the -val is to 'fix' alignment of entry position */
 157         y += wy - 2;
 158
 159         /* now show it */
 160         gtk_widget_set_size_request(ted->window, w, h);
 161         gtk_widget_realize(ted->window);
 162         gtk_window_move(GTK_WINDOW(ted->window), x, y);
 163         gtk_window_resize(GTK_WINDOW(ted->window), w, h);
 164         gtk_widget_show(ted->window);
 165
 166         /* grab it */
 167         gtk_widget_grab_focus(ted->entry);
 168         /* explicitely set the focus flag for the entry, for some reason on popup windows this
 169          * is not set, and causes no edit cursor to appear ( popups not allowed focus? )
 170          */
 171         gtk_widget_grab_focus(ted->entry);
 172         gtk_grab_add(ted->window);
 173         gdk_pointer_grab(gtk_widget_get_window(ted->window), TRUE,
 174                          GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_MOTION_MASK,
 175                          NULL, NULL, GDK_CURRENT_TIME);
 176         gdk_keyboard_grab(gtk_widget_get_window(ted->window), TRUE, GDK_CURRENT_TIME);
 177
 178         return FALSE;
 179 }
 180
 181 gboolean tree_edit_by_path(GtkTreeView *tree, GtkTreePath *tpath, gint column, const gchar *text,
 182                            gboolean (*edit_func)(TreeEditData *, const gchar *, const gchar *, gpointer), gpointer data)
 183 {
 184         TreeEditData *ted;
 185         GtkTreeViewColumn *tcolumn;
 186         GtkCellRenderer *cell = NULL;
 187         GList *list;
 188         GList *work;
 189
 190         if (!edit_func) return FALSE;
 191         if (!gtk_widget_get_visible(GTK_WIDGET(tree))) return FALSE;
 192
 193         tcolumn = gtk_tree_view_get_column(tree, column);
 194         if (!tcolumn) return FALSE;
 195
 196         list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(tcolumn));
 197         work = list;
 198         while (work && !cell)
 199                 {
 200                 cell = work->data;
 201                 if (!GTK_IS_CELL_RENDERER_TEXT(cell))
 202                         {
 203                         cell = NULL;
 204                         }
 205                 work = work->next;
 206                 }
 207
 208         g_list_free(list);
 209         if (!cell) return FALSE;
 210
 211         if (!text) text = "";
 212
 213         ted = g_new0(TreeEditData, 1);
 214
 215         ted->old_name = g_strdup(text);
 216
 217         ted->edit_func = edit_func;
 218         ted->edit_data = data;
 219
 220         ted->tree = tree;
 221         ted->path = gtk_tree_path_copy(tpath);
 222         ted->column = tcolumn;
 223         ted->cell = cell;
 224
 225         gtk_tree_view_scroll_to_cell(ted->tree, ted->path, ted->column, FALSE, 0.0, 0.0);
 226
 227         /* create the window */
 228
 229         ted->window = gtk_window_new(GTK_WINDOW_POPUP);
 230         gtk_window_set_resizable(GTK_WINDOW(ted->window), FALSE);
 231         g_signal_connect(G_OBJECT(ted->window), "button_press_event",
 232                          G_CALLBACK(tree_edit_click_cb), ted);
 233         g_signal_connect(G_OBJECT(ted->window), "key_press_event",
 234                          G_CALLBACK(tree_edit_key_press_cb), ted);
 235
 236         ted->entry = gtk_entry_new();
 237         gtk_entry_set_text(GTK_ENTRY(ted->entry), ted->old_name);
 238         gtk_editable_select_region(GTK_EDITABLE(ted->entry), 0, strlen(ted->old_name));
 239         gtk_container_add(GTK_CONTAINER(ted->window), ted->entry);
 240         gtk_widget_show(ted->entry);
 241
 242         /* due to the fact that gtktreeview scrolls in an idle loop, we cannot
 243          * reliably get the cell position until those scroll priority signals are processed
 244          */
 245         g_idle_add_full(G_PRIORITY_DEFAULT_IDLE - 2, tree_edit_by_path_idle_cb, ted, NULL);
 246
 247         return TRUE;
 248 }
 249
 250 /*
 251  *-------------------------------------------------------------------
 252  * tree cell position retrieval
 253  *-------------------------------------------------------------------
 254  */
 255
 256 gboolean tree_view_get_cell_origin(GtkTreeView *widget, GtkTreePath *tpath, gint column, gboolean text_cell_only,
 257                                    gint *x, gint *y, gint *width, gint *height)
 258 {
 259         gint x_origin, y_origin;
 260         gint x_offset, y_offset;
 261         gint header_size;
 262         GtkTreeViewColumn *tv_column;
 263         GdkRectangle rect;
 264
 265         tv_column = gtk_tree_view_get_column(widget, column);
 266         if (!tv_column || !tpath) return FALSE;
 267
 268         /* hmm, appears the rect will not account for X scroll, but does for Y scroll
 269          * use x_offset instead for X scroll (sigh)
 270          */
 271         gtk_tree_view_get_cell_area(widget, tpath, tv_column, &rect);
 272         gtk_tree_view_convert_tree_to_widget_coords(widget, 0, 0, &x_offset, &y_offset);
 273         gdk_window_get_origin(gtk_widget_get_window(GTK_WIDGET(widget)), &x_origin, &y_origin);
 274
 275         if (gtk_tree_view_get_headers_visible(widget))
 276                 {
 277                 GtkAllocation allocation;
 278 #if GTK_CHECK_VERSION(3,0,0)
 279                 gtk_widget_get_allocation(gtk_tree_view_column_get_button(tv_column), &allocation);
 280 #else
 281                 gtk_widget_get_allocation(tv_column->button, &allocation);
 282 #endif
 283                 header_size = allocation.height;
 284                 }
 285         else
 286                 {
 287                 header_size = 0;
 288                 }
 289
 290         if (text_cell_only)
 291                 {
 292                 GtkCellRenderer *cell = NULL;
 293                 GList *renderers;
 294                 GList *work;
 295                 gint cell_x;
 296                 gint cell_width;
 297
 298                 renderers = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(tv_column));
 299                 work = renderers;
 300                 while (work && !cell)
 301                         {
 302                         cell = work->data;
 303                         work = work->next;
 304                         if (!GTK_IS_CELL_RENDERER_TEXT(cell)) cell = NULL;
 305                         }
 306                 g_list_free(renderers);
 307
 308                 if (!cell) return FALSE;
 309
 310                 if (!gtk_tree_view_column_cell_get_position(tv_column, cell, &cell_x, &cell_width))
 311                         {
 312                         cell_x = 0;
 313                         cell_width = rect.width;
 314                         }
 315                 *x = x_origin + x_offset + rect.x + cell_x;
 316                 *width = cell_width;
 317                 }
 318         else
 319                 {
 320                 *x = x_origin + x_offset + rect.x;
 321                 *width = rect.width;
 322                 }
 323         *y = y_origin + rect.y + header_size;
 324         *height = rect.height;
 325         return TRUE;
 326 }
 327
 328 void tree_view_get_cell_clamped(GtkTreeView *widget, GtkTreePath *tpath, gint column, gboolean text_cell_only,
 329                                 gint *x, gint *y, gint *width, gint *height)
 330 {
 331         gint wx, wy, ww, wh;
 332         GdkWindow *window;
 333
 334         window = gtk_widget_get_window(GTK_WIDGET(widget));
 335         gdk_window_get_origin(window, &wx, &wy);
 336
 337         ww = gdk_window_get_width(window);
 338         wh = gdk_window_get_height(window);
 339
 340         if (!tree_view_get_cell_origin(widget, tpath, column, text_cell_only, x,  y, width, height))
 341                 {
 342                 *x = wx;
 343                 *y = wy;
 344                 *width = ww;
 345                 *height = wh;
 346                 return;
 347                 }
 348
 349         *width = MIN(*width, ww);
 350         *x = CLAMP(*x, wx, wx + ww - (*width));
 351         *y = CLAMP(*y, wy, wy + wh);
 352         *height = MIN(*height, wy + wh - (*y));
 353 }
 354
 355 /* an implementation that uses gtk_tree_view_get_visible_range */
 356 gint tree_view_row_get_visibility(GtkTreeView *widget, GtkTreeIter *iter, gboolean fully_visible)
 357 {
 358         GtkTreeModel *store;
 359         GtkTreePath *tpath, *start_path, *end_path;
 360         gint ret = 0;
 361
 362         if (!gtk_tree_view_get_visible_range(widget, &start_path, &end_path)) return -1; /* we will most probably scroll down, needed for tree_view_row_make_visible */
 363
 364         store = gtk_tree_view_get_model(widget);
 365         tpath = gtk_tree_model_get_path(store, iter);
 366
 367         if (fully_visible)
 368                 {
 369                 if (gtk_tree_path_compare(tpath, start_path) <= 0)
 370                         {
 371                         ret = -1;
 372                         }
 373                 else if (gtk_tree_path_compare(tpath, end_path) >= 0)
 374                         {
 375                         ret = 1;
 376                         }
 377                 }
 378         else
 379                 {
 380                 if (gtk_tree_path_compare(tpath, start_path) < 0)
 381                         {
 382                         ret = -1;
 383                         }
 384                 else if (gtk_tree_path_compare(tpath, end_path) > 0)
 385                         {
 386                         ret = 1;
 387                         }
 388                 }
 389
 390         gtk_tree_path_free(tpath);
 391         gtk_tree_path_free(start_path);
 392         gtk_tree_path_free(end_path);
 393         return ret;
 394 }
 395
 396 gint tree_view_row_make_visible(GtkTreeView *widget, GtkTreeIter *iter, gboolean center)
 397 {
 398         GtkTreePath *tpath;
 399         gint vis;
 400
 401         vis = tree_view_row_get_visibility(widget, iter, TRUE);
 402
 403         tpath = gtk_tree_model_get_path(gtk_tree_view_get_model(widget), iter);
 404         if (center && vis != 0)
 405                 {
 406                 gtk_tree_view_scroll_to_cell(widget, tpath, NULL, TRUE, 0.5, 0.0);
 407                 }
 408         else if (vis < 0)
 409                 {
 410                 gtk_tree_view_scroll_to_cell(widget, tpath, NULL, TRUE, 0.0, 0.0);
 411                 }
 412         else if (vis > 0)
 413                 {
 414                 gtk_tree_view_scroll_to_cell(widget, tpath, NULL, TRUE, 1.0, 0.0);
 415                 }
 416         gtk_tree_path_free(tpath);
 417
 418         return vis;
 419 }
 420
 421 gboolean tree_view_move_cursor_away(GtkTreeView *widget, GtkTreeIter *iter, gboolean only_selected)
 422 {
 423         GtkTreeModel *store;
 424         GtkTreePath *tpath;
 425         GtkTreePath *fpath;
 426         gboolean move = FALSE;
 427
 428         if (!iter) return FALSE;
 429
 430         store = gtk_tree_view_get_model(widget);
 431         tpath = gtk_tree_model_get_path(store, iter);
 432         gtk_tree_view_get_cursor(widget, &fpath, NULL);
 433
 434         if (fpath && gtk_tree_path_compare(tpath, fpath) == 0)
 435                 {
 436                 GtkTreeSelection *selection;
 437
 438                 selection = gtk_tree_view_get_selection(widget);
 439
 440                 if (!only_selected ||
 441                     gtk_tree_selection_path_is_selected(selection, tpath))
 442                         {
 443                         GtkTreeIter current;
 444
 445                         current = *iter;
 446                         if (gtk_tree_model_iter_next(store, &current))
 447                                 {
 448                                 gtk_tree_path_next(tpath);
 449                                 move = TRUE;
 450                                 }
 451                         else if (gtk_tree_path_prev(tpath) &&
 452                                  gtk_tree_model_get_iter(store, &current, tpath))
 453                                 {
 454                                 move = TRUE;
 455                                 }
 456
 457                         if (move)
 458                                 {
 459                                 gtk_tree_view_set_cursor(widget, tpath, NULL, FALSE);
 460                                 }
 461                         }
 462                 }
 463
 464         gtk_tree_path_free(tpath);
 465         if (fpath) gtk_tree_path_free(fpath);
 466
 467         return move;
 468 }
 469
 470 gint tree_path_to_row(GtkTreePath *tpath)
 471 {
 472         gint *indices;
 473
 474         indices = gtk_tree_path_get_indices(tpath);
 475         if (indices) return indices[0];
 476
 477         return -1;
 478 }
 479
 480
 481 /*
 482  *-------------------------------------------------------------------
 483  * color utilities
 484  *-------------------------------------------------------------------
 485  */
 486
 487 void shift_color(GdkColor *src, gshort val, gint direction)
 488 {
 489         gshort cs;
 490
 491         if (val == -1)
 492                 {
 493                 val = STYLE_SHIFT_STANDARD;
 494                 }
 495         else
 496                 {
 497                 val = CLAMP(val, 1, 100);
 498                 }
 499         cs = 0xffff / 100 * val;
 500
 501         /* up or down ? */
 502         if (direction < 0 ||
 503             (direction == 0 &&((gint)src->red + (gint)src->green + (gint)src->blue) / 3 > 0xffff / 2))
 504                 {
 505                 src->red = MAX(0 , src->red - cs);
 506                 src->green = MAX(0 , src->green - cs);
 507                 src->blue = MAX(0 , src->blue - cs);
 508                 }
 509         else
 510                 {
 511                 src->red = MIN(0xffff, src->red + cs);
 512                 src->green = MIN(0xffff, src->green + cs);
 513                 src->blue = MIN(0xffff, src->blue + cs);
 514                 }
 515 }
 516
 517 /* darkens or lightens a style's color for given state
 518  * esp. useful for alternating dark/light in (c)lists
 519  */
 520 void style_shift_color(GtkStyle *style, GtkStateType type, gshort shift_value, gint direction)
 521 {
 522         if (!style) return;
 523
 524         shift_color(&style->base[type], shift_value, direction);
 525         shift_color(&style->bg[type], shift_value, direction);
 526 }
 527
 528 /*
 529  *-------------------------------------------------------------------
 530  * auto scroll by mouse position
 531  *-------------------------------------------------------------------
 532  */
 533
 534 #define AUTO_SCROLL_DEFAULT_SPEED 100
 535 #define AUTO_SCROLL_DEFAULT_REGION 20
 536
 537 typedef struct _AutoScrollData AutoScrollData;
 538 struct _AutoScrollData
 539 {
 540         guint timer_id; /* event source id */
 541         gint region_size;
 542         GtkWidget *widget;
 543         GtkAdjustment *adj;
 544         gint max_step;
 545
 546         gint (*notify_func)(GtkWidget *, gint, gint, gpointer);
 547         gpointer notify_data;
 548 };
 549
 550 void widget_auto_scroll_stop(GtkWidget *widget)
 551 {
 552         AutoScrollData *sd;
 553
 554         sd = g_object_get_data(G_OBJECT(widget), "autoscroll");
 555         if (!sd) return;
 556         g_object_set_data(G_OBJECT(widget), "autoscroll", NULL);
 557
 558         if (sd->timer_id) g_source_remove(sd->timer_id);
 559         g_free(sd);
 560 }
 561
 562 static gboolean widget_auto_scroll_cb(gpointer data)
 563 {
 564         AutoScrollData *sd = data;
 565         GdkWindow *window;
 566         gint x, y;
 567         gint w, h;
 568         gint amt = 0;
 569
 570         if (sd->max_step < sd->region_size)
 571                 {
 572                 sd->max_step = MIN(sd->region_size, sd->max_step + 2);
 573                 }
 574
 575         window = gtk_widget_get_window(sd->widget);
 576         gdk_window_get_pointer(window, &x, &y, NULL);
 577         w = gdk_window_get_width(window);
 578         h = gdk_window_get_height(window);
 579
 580         if (x < 0 || x >= w || y < 0 || y >= h)
 581                 {
 582                 sd->timer_id = 0;
 583                 widget_auto_scroll_stop(sd->widget);
 584                 return FALSE;
 585                 }
 586
 587         if (h < sd->region_size * 3)
 588                 {
 589                 /* height is cramped, nicely divide into three equal regions */
 590                 if (y < h / 3 || y > h / 3 * 2)
 591                         {
 592                         amt = (y < h / 2) ? 0 - ((h / 2) - y) : y - (h / 2);
 593                         }
 594                 }
 595         else if (y < sd->region_size)
 596                 {
 597                 amt = 0 - (sd->region_size - y);
 598                 }
 599         else if (y >= h - sd->region_size)
 600                 {
 601                 amt = y - (h - sd->region_size);
 602                 }
 603
 604         if (amt != 0)
 605                 {
 606                 amt = CLAMP(amt, 0 - sd->max_step, sd->max_step);
 607
 608                 if (gtk_adjustment_get_value(sd->adj) != CLAMP(gtk_adjustment_get_value(sd->adj) + amt, gtk_adjustment_get_lower(sd->adj), gtk_adjustment_get_upper(sd->adj) - gtk_adjustment_get_page_size(sd->adj)))
 609                         {
 610                         /* only notify when scrolling is needed */
 611                         if (sd->notify_func && !sd->notify_func(sd->widget, x, y, sd->notify_data))
 612                                 {
 613                                 sd->timer_id = 0;
 614                                 widget_auto_scroll_stop(sd->widget);
 615                                 return FALSE;
 616                                 }
 617
 618                         gtk_adjustment_set_value(sd->adj,
 619                                 CLAMP(gtk_adjustment_get_value(sd->adj) + amt, gtk_adjustment_get_lower(sd->adj), gtk_adjustment_get_upper(sd->adj) - gtk_adjustment_get_page_size(sd->adj)));
 620                         }
 621                 }
 622
 623         return TRUE;
 624 }
 625
 626 gint widget_auto_scroll_start(GtkWidget *widget, GtkAdjustment *v_adj, gint scroll_speed, gint region_size,
 627                               gint (*notify_func)(GtkWidget *widget, gint x, gint y, gpointer data), gpointer notify_data)
 628 {
 629         AutoScrollData *sd;
 630
 631         if (!widget || !v_adj) return 0;
 632         if (g_object_get_data(G_OBJECT(widget), "autoscroll")) return 0;
 633         if (scroll_speed < 1) scroll_speed = AUTO_SCROLL_DEFAULT_SPEED;
 634         if (region_size < 1) region_size = AUTO_SCROLL_DEFAULT_REGION;
 635
 636         sd = g_new0(AutoScrollData, 1);
 637         sd->widget = widget;
 638         sd->adj = v_adj;
 639         sd->region_size = region_size;
 640         sd->max_step = 1;
 641         sd->timer_id = g_timeout_add(scroll_speed, widget_auto_scroll_cb, sd);
 642
 643         sd->notify_func = notify_func;
 644         sd->notify_data = notify_data;
 645
 646         g_object_set_data(G_OBJECT(widget), "autoscroll", sd);
 647
 648         return scroll_speed;
 649 }
 650
 651
 652 /*
 653  *-------------------------------------------------------------------
 654  * GList utils
 655  *-------------------------------------------------------------------
 656  */
 657
 658 GList *uig_list_insert_link(GList *list, GList *link, gpointer data)
 659 {
 660         GList *new_list;
 661
 662         if (!list || link == list) return g_list_prepend(list, data);
 663         if (!link) return g_list_append(list, data);
 664
 665         new_list = g_list_alloc();
 666         new_list->data = data;
 667
 668         if (link->prev)
 669                 {
 670                 link->prev->next = new_list;
 671                 new_list->prev = link->prev;
 672                 }
 673         else
 674                 {
 675                 list = new_list;
 676                 }
 677         link->prev = new_list;
 678         new_list->next = link;
 679
 680         return list;
 681 }
 682
 683 GList *uig_list_insert_list(GList *parent, GList *insert_link, GList *list)
 684 {
 685         GList *end;
 686
 687         if (!insert_link) return g_list_concat(parent, list);
 688         if (insert_link == parent) return g_list_concat(list, parent);
 689         if (!parent) return list;
 690         if (!list) return parent;
 691
 692         end  = g_list_last(list);
 693
 694         if (insert_link->prev) insert_link->prev->next = list;
 695         list->prev = insert_link->prev;
 696         insert_link->prev = end;
 697         end->next = insert_link;
 698
 699         return parent;
 700 }
 701 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */