src/ui-tree-edit.cc

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include <cstring>
  23
  24 #include "main.h"
  25
  26 #include "misc.h"
  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         gq_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(gq_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 *, GdkEventButton *, gpointer data)
  67 {
  68         auto ted = static_cast<TreeEditData *>(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 *, GdkEventButton *event, gpointer data)
  77 {
  78         auto ted = static_cast<TreeEditData *>(data);
  79         GdkWindow *window = gtk_widget_get_window(ted->window);
  80
  81         gint x;
  82         gint y;
  83         gint w;
  84         gint h;
  85
  86         gint xr;
  87         gint yr;
  88
  89         xr = static_cast<gint>(event->x_root);
  90         yr = static_cast<gint>(event->y_root);
  91
  92         gdk_window_get_origin(window, &x, &y);
  93         w = gdk_window_get_width(window);
  94         h = gdk_window_get_height(window);
  95
  96         if (xr < x || yr < y || xr > x + w || yr > y + h)
  97                 {
  98                 /* gobble the release event, so it does not propgate to an underlying widget */
  99                 g_signal_connect(G_OBJECT(ted->window), "button_release_event",
 100                                  G_CALLBACK(tree_edit_click_end_cb), ted);
 101                 return TRUE;
 102                 }
 103         return FALSE;
 104 }
 105
 106 static gboolean tree_edit_key_press_cb(GtkWidget *, GdkEventKey *event, gpointer data)
 107 {
 108         auto ted = static_cast<TreeEditData *>(data);
 109
 110         switch (event->keyval)
 111                 {
 112                 case GDK_KEY_Return:
 113                 case GDK_KEY_KP_Enter:
 114                 case GDK_KEY_Tab:               /* ok, we are going to intercept the focus change
 115                                            from keyboard and act like return was hit */
 116                 case GDK_KEY_ISO_Left_Tab:
 117                 case GDK_KEY_Up:
 118                 case GDK_KEY_Down:
 119                 case GDK_KEY_KP_Up:
 120                 case GDK_KEY_KP_Down:
 121                 case GDK_KEY_KP_Left:
 122                 case GDK_KEY_KP_Right:
 123                         tree_edit_do(ted);
 124                         tree_edit_close(ted);
 125                         break;
 126                 case GDK_KEY_Escape:
 127                         tree_edit_close(ted);
 128                         break;
 129                 default:
 130                         break;
 131                 }
 132
 133         return FALSE;
 134 }
 135
 136 static gboolean tree_edit_by_path_idle_cb(gpointer data)
 137 {
 138         auto ted = static_cast<TreeEditData *>(data);
 139         GdkRectangle rect;
 140         gint x;
 141         gint y;
 142         gint w;
 143         gint h; /* geometry of cell within tree */
 144         gint wx;
 145         gint wy;                /* geometry of tree from root window */
 146         gint sx;
 147         gint sw;
 148
 149         gtk_tree_view_get_cell_area(ted->tree, ted->path, ted->column, &rect);
 150
 151         x = rect.x;
 152         y = rect.y;
 153         w = rect.width + 4;
 154         h = rect.height + 4;
 155
 156         if (gtk_tree_view_column_cell_get_position(ted->column, ted->cell, &sx, &sw))
 157                 {
 158                 x += sx;
 159                 w = MAX(w - sx, sw);
 160                 }
 161
 162         gdk_window_get_origin(gtk_widget_get_window(gtk_widget_get_parent(GTK_WIDGET(ted->tree))), &wx, &wy);
 163
 164         x += wx - 2; /* the -val is to 'fix' alignment of entry position */
 165         y += wy - 2;
 166
 167         /* now show it */
 168         gtk_widget_set_size_request(ted->window, w, h);
 169         gtk_widget_realize(ted->window);
 170         gq_gtk_window_move(GTK_WINDOW(ted->window), x, y);
 171         gtk_window_resize(GTK_WINDOW(ted->window), w, h);
 172         gtk_widget_show(ted->window);
 173
 174         /* grab it */
 175         gtk_widget_grab_focus(ted->entry);
 176         /* explicitly set the focus flag for the entry, for some reason on popup windows this
 177          * is not set, and causes no edit cursor to appear ( popups not allowed focus? )
 178          */
 179         gtk_widget_grab_focus(ted->entry);
 180         gtk_grab_add(ted->window);
 181         gdk_pointer_grab(gtk_widget_get_window(ted->window), TRUE,
 182                          static_cast<GdkEventMask>(GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_MOTION_MASK),
 183                          nullptr, nullptr, GDK_CURRENT_TIME);
 184         gdk_keyboard_grab(gtk_widget_get_window(ted->window), TRUE, GDK_CURRENT_TIME);
 185
 186         return G_SOURCE_REMOVE;
 187 }
 188
 189 gboolean tree_edit_by_path(GtkTreeView *tree, GtkTreePath *tpath, gint column, const gchar *text,
 190                            gboolean (*edit_func)(TreeEditData *, const gchar *, const gchar *, gpointer), gpointer data)
 191 {
 192         TreeEditData *ted;
 193         GtkTreeViewColumn *tcolumn;
 194         GtkCellRenderer *cell = nullptr;
 195         GList *list;
 196         GList *work;
 197
 198         if (!edit_func) return FALSE;
 199         if (!gtk_widget_get_visible(GTK_WIDGET(tree))) return FALSE;
 200
 201         tcolumn = gtk_tree_view_get_column(tree, column);
 202         if (!tcolumn) return FALSE;
 203
 204         list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(tcolumn));
 205         work = list;
 206         while (work && !cell)
 207                 {
 208                 cell = static_cast<GtkCellRenderer *>(work->data);
 209                 if (!GTK_IS_CELL_RENDERER_TEXT(cell))
 210                         {
 211                         cell = nullptr;
 212                         }
 213                 work = work->next;
 214                 }
 215
 216         g_list_free(list);
 217         if (!cell) return FALSE;
 218
 219         if (!text) text = "";
 220
 221         ted = g_new0(TreeEditData, 1);
 222
 223         ted->old_name = g_strdup(text);
 224
 225         ted->edit_func = edit_func;
 226         ted->edit_data = data;
 227
 228         ted->tree = tree;
 229         ted->path = gtk_tree_path_copy(tpath);
 230         ted->column = tcolumn;
 231         ted->cell = cell;
 232
 233         gtk_tree_view_scroll_to_cell(ted->tree, ted->path, ted->column, TRUE, 0.5, 0.0);
 234
 235         /* create the window */
 236
 237         ted->window = gtk_window_new(GTK_WINDOW_POPUP);
 238         gtk_window_set_resizable(GTK_WINDOW(ted->window), FALSE);
 239         g_signal_connect(G_OBJECT(ted->window), "button_press_event",
 240                          G_CALLBACK(tree_edit_click_cb), ted);
 241         g_signal_connect(G_OBJECT(ted->window), "key_press_event",
 242                          G_CALLBACK(tree_edit_key_press_cb), ted);
 243
 244         ted->entry = gtk_entry_new();
 245         gq_gtk_entry_set_text(GTK_ENTRY(ted->entry), ted->old_name);
 246         gtk_editable_select_region(GTK_EDITABLE(ted->entry), 0, strlen(ted->old_name));
 247         gq_gtk_container_add(GTK_WIDGET(ted->window), ted->entry);
 248         gtk_widget_show(ted->entry);
 249
 250         /* due to the fact that gtktreeview scrolls in an idle loop, we cannot
 251          * reliably get the cell position until those scroll priority signals are processed
 252          */
 253         g_idle_add_full(G_PRIORITY_DEFAULT_IDLE - 2, tree_edit_by_path_idle_cb, ted, nullptr);
 254
 255         return TRUE;
 256 }
 257
 258 /*
 259  *-------------------------------------------------------------------
 260  * tree cell position retrieval
 261  *-------------------------------------------------------------------
 262  */
 263
 264 gboolean tree_view_get_cell_origin(GtkTreeView *widget, GtkTreePath *tpath, gint column, gboolean text_cell_only,
 265                                    gint *x, gint *y, gint *width, gint *height)
 266 {
 267         gint x_origin;
 268         gint y_origin;
 269         gint x_offset;
 270         gint y_offset;
 271         gint header_size;
 272         GtkTreeViewColumn *tv_column;
 273         GdkRectangle rect;
 274
 275         tv_column = gtk_tree_view_get_column(widget, column);
 276         if (!tv_column || !tpath) return FALSE;
 277
 278         /* hmm, appears the rect will not account for X scroll, but does for Y scroll
 279          * use x_offset instead for X scroll (sigh)
 280          */
 281         gtk_tree_view_get_cell_area(widget, tpath, tv_column, &rect);
 282         gtk_tree_view_convert_tree_to_widget_coords(widget, 0, 0, &x_offset, &y_offset);
 283         gdk_window_get_origin(gtk_widget_get_window(GTK_WIDGET(widget)), &x_origin, &y_origin);
 284
 285         if (gtk_tree_view_get_headers_visible(widget))
 286                 {
 287                 GtkAllocation allocation;
 288                 gtk_widget_get_allocation(gtk_tree_view_column_get_button(tv_column), &allocation);
 289                 header_size = allocation.height;
 290                 }
 291         else
 292                 {
 293                 header_size = 0;
 294                 }
 295
 296         if (text_cell_only)
 297                 {
 298                 GtkCellRenderer *cell = nullptr;
 299                 GList *renderers;
 300                 GList *work;
 301                 gint cell_x;
 302                 gint cell_width;
 303
 304                 renderers = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(tv_column));
 305                 work = renderers;
 306                 while (work && !cell)
 307                         {
 308                         cell = static_cast<GtkCellRenderer *>(work->data);
 309                         work = work->next;
 310                         if (!GTK_IS_CELL_RENDERER_TEXT(cell)) cell = nullptr;
 311                         }
 312                 g_list_free(renderers);
 313
 314                 if (!cell) return FALSE;
 315
 316                 if (!gtk_tree_view_column_cell_get_position(tv_column, cell, &cell_x, &cell_width))
 317                         {
 318                         cell_x = 0;
 319                         cell_width = rect.width;
 320                         }
 321                 *x = x_origin + x_offset + rect.x + cell_x;
 322                 *width = cell_width;
 323                 }
 324         else
 325                 {
 326                 *x = x_origin + x_offset + rect.x;
 327                 *width = rect.width;
 328                 }
 329         *y = y_origin + rect.y + header_size;
 330         *height = rect.height;
 331         return TRUE;
 332 }
 333
 334 void tree_view_get_cell_clamped(GtkTreeView *widget, GtkTreePath *tpath, gint column, gboolean text_cell_only,
 335                                 gint *x, gint *y, gint *width, gint *height)
 336 {
 337         gint wx;
 338         gint wy;
 339         gint ww;
 340         gint wh;
 341         GdkWindow *window;
 342
 343         window = gtk_widget_get_window(GTK_WIDGET(widget));
 344         gdk_window_get_origin(window, &wx, &wy);
 345
 346         ww = gdk_window_get_width(window);
 347         wh = gdk_window_get_height(window);
 348
 349         if (!tree_view_get_cell_origin(widget, tpath, column, text_cell_only, x,  y, width, height))
 350                 {
 351                 *x = wx;
 352                 *y = wy;
 353                 *width = ww;
 354                 *height = wh;
 355                 return;
 356                 }
 357
 358         *width = MIN(*width, ww);
 359         *x = CLAMP(*x, wx, wx + ww - (*width));
 360         *y = CLAMP(*y, wy, wy + wh);
 361         *height = MIN(*height, wy + wh - (*y));
 362 }
 363
 364 /* an implementation that uses gtk_tree_view_get_visible_range */
 365 gint tree_view_row_get_visibility(GtkTreeView *widget, GtkTreeIter *iter, gboolean fully_visible)
 366 {
 367         GtkTreeModel *store;
 368         GtkTreePath *tpath;
 369         GtkTreePath *start_path;
 370         GtkTreePath *end_path;
 371         gint ret = 0;
 372
 373         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 */
 374
 375         store = gtk_tree_view_get_model(widget);
 376         tpath = gtk_tree_model_get_path(store, iter);
 377
 378         if (fully_visible)
 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         else
 390                 {
 391                 if (gtk_tree_path_compare(tpath, start_path) < 0)
 392                         {
 393                         ret = -1;
 394                         }
 395                 else if (gtk_tree_path_compare(tpath, end_path) > 0)
 396                         {
 397                         ret = 1;
 398                         }
 399                 }
 400
 401         gtk_tree_path_free(tpath);
 402         gtk_tree_path_free(start_path);
 403         gtk_tree_path_free(end_path);
 404         return ret;
 405 }
 406
 407 gint tree_view_row_make_visible(GtkTreeView *widget, GtkTreeIter *iter, gboolean center)
 408 {
 409         GtkTreePath *tpath;
 410         gint vis;
 411
 412         vis = tree_view_row_get_visibility(widget, iter, TRUE);
 413
 414         tpath = gtk_tree_model_get_path(gtk_tree_view_get_model(widget), iter);
 415         if (center && vis != 0)
 416                 {
 417                 gtk_tree_view_scroll_to_cell(widget, tpath, nullptr, TRUE, 0.5, 0.0);
 418                 }
 419         else if (vis < 0)
 420                 {
 421                 gtk_tree_view_scroll_to_cell(widget, tpath, nullptr, TRUE, 0.0, 0.0);
 422                 }
 423         else if (vis > 0)
 424                 {
 425                 gtk_tree_view_scroll_to_cell(widget, tpath, nullptr, TRUE, 1.0, 0.0);
 426                 }
 427         gtk_tree_path_free(tpath);
 428
 429         return vis;
 430 }
 431
 432 gboolean tree_view_move_cursor_away(GtkTreeView *widget, GtkTreeIter *iter, gboolean only_selected)
 433 {
 434         GtkTreeModel *store;
 435         GtkTreePath *tpath;
 436         GtkTreePath *fpath;
 437         gboolean move = FALSE;
 438
 439         if (!iter) return FALSE;
 440
 441         store = gtk_tree_view_get_model(widget);
 442         tpath = gtk_tree_model_get_path(store, iter);
 443         gtk_tree_view_get_cursor(widget, &fpath, nullptr);
 444
 445         if (fpath && gtk_tree_path_compare(tpath, fpath) == 0)
 446                 {
 447                 GtkTreeSelection *selection;
 448
 449                 selection = gtk_tree_view_get_selection(widget);
 450
 451                 if (!only_selected ||
 452                     gtk_tree_selection_path_is_selected(selection, tpath))
 453                         {
 454                         GtkTreeIter current;
 455
 456                         current = *iter;
 457                         if (gtk_tree_model_iter_next(store, &current))
 458                                 {
 459                                 gtk_tree_path_next(tpath);
 460                                 move = TRUE;
 461                                 }
 462                         else if (gtk_tree_path_prev(tpath) &&
 463                                  gtk_tree_model_get_iter(store, &current, tpath))
 464                                 {
 465                                 move = TRUE;
 466                                 }
 467
 468                         if (move)
 469                                 {
 470                                 gtk_tree_view_set_cursor(widget, tpath, nullptr, FALSE);
 471                                 }
 472                         }
 473                 }
 474
 475         gtk_tree_path_free(tpath);
 476         if (fpath) gtk_tree_path_free(fpath);
 477
 478         return move;
 479 }
 480
 481 #pragma GCC diagnostic push
 482 #pragma GCC diagnostic ignored "-Wunused-function"
 483 gint tree_path_to_row_unused(GtkTreePath *tpath)
 484 {
 485         gint *indices;
 486
 487         indices = gtk_tree_path_get_indices(tpath);
 488         if (indices) return indices[0];
 489
 490         return -1;
 491 }
 492 #pragma GCC diagnostic pop
 493
 494
 495 /*
 496  *-------------------------------------------------------------------
 497  * color utilities
 498  *-------------------------------------------------------------------
 499  */
 500
 501 void shift_color(GdkRGBA *src, gshort val, gint direction)
 502 {
 503         gdouble cs;
 504
 505         if (val == -1)
 506                 {
 507                 val = STYLE_SHIFT_STANDARD;
 508                 }
 509         else
 510                 {
 511                 val = CLAMP(val, 1, 100);
 512                 }
 513
 514         cs = 1.0 / 100 * val;
 515
 516         /* up or down ? */
 517         if (direction < 0 || (direction == 0 &&(static_cast<gdouble>(src->red) + static_cast<gdouble>(src->green) + static_cast<gdouble>(src->blue)) / 3 > 1.0 / 2))
 518                 {
 519                 src->red = MAX(0 , src->red - cs);
 520                 src->green = MAX(0 , src->green - cs);
 521                 src->blue = MAX(0 , src->blue - cs);
 522                 }
 523         else
 524                 {
 525                 src->red = MIN(1.0, src->red + cs);
 526                 src->green = MIN(1.0, src->green + cs);
 527                 src->blue = MIN(1.0, src->blue + cs);
 528                 }
 529 }
 530
 531 /*
 532  *-------------------------------------------------------------------
 533  * auto scroll by mouse position
 534  *-------------------------------------------------------------------
 535  */
 536
 537 enum {
 538         AUTO_SCROLL_DEFAULT_SPEED = 100,
 539         AUTO_SCROLL_DEFAULT_REGION = 20
 540 };
 541
 542 struct AutoScrollData
 543 {
 544         guint timer_id; /* event source id */
 545         gint region_size;
 546         GtkWidget *widget;
 547         GtkAdjustment *adj;
 548         gint max_step;
 549
 550         gint (*notify_func)(GtkWidget *, gint, gint, gpointer);
 551         gpointer notify_data;
 552 };
 553
 554 void widget_auto_scroll_stop(GtkWidget *widget)
 555 {
 556         AutoScrollData *sd;
 557
 558         sd = static_cast<AutoScrollData *>(g_object_get_data(G_OBJECT(widget), "autoscroll"));
 559         if (!sd) return;
 560         g_object_set_data(G_OBJECT(widget), "autoscroll", nullptr);
 561
 562         if (sd->timer_id) g_source_remove(sd->timer_id);
 563         g_free(sd);
 564 }
 565
 566 static gboolean widget_auto_scroll_cb(gpointer data)
 567 {
 568         auto sd = static_cast<AutoScrollData *>(data);
 569         GdkWindow *window;
 570         gint x;
 571         gint y;
 572         gint w;
 573         gint h;
 574         gint amt = 0;
 575         GdkSeat *seat;
 576         GdkDevice *device;
 577
 578         if (sd->max_step < sd->region_size)
 579                 {
 580                 sd->max_step = MIN(sd->region_size, sd->max_step + 2);
 581                 }
 582
 583         window = gtk_widget_get_window(sd->widget);
 584         seat = gdk_display_get_default_seat(gdk_window_get_display(window));
 585         device = gdk_seat_get_pointer(seat);
 586         gdk_window_get_device_position(window, device, &x, &y, nullptr);
 587
 588         w = gdk_window_get_width(window);
 589         h = gdk_window_get_height(window);
 590
 591         if (x < 0 || x >= w || y < 0 || y >= h)
 592                 {
 593                 sd->timer_id = 0;
 594                 widget_auto_scroll_stop(sd->widget);
 595                 return FALSE;
 596                 }
 597
 598         if (h < sd->region_size * 3)
 599                 {
 600                 /* height is cramped, nicely divide into three equal regions */
 601                 if (y < h / 3 || y > h / 3 * 2)
 602                         {
 603                         amt = (y < h / 2) ? 0 - ((h / 2) - y) : y - (h / 2);
 604                         }
 605                 }
 606         else if (y < sd->region_size)
 607                 {
 608                 amt = 0 - (sd->region_size - y);
 609                 }
 610         else if (y >= h - sd->region_size)
 611                 {
 612                 amt = y - (h - sd->region_size);
 613                 }
 614
 615         if (amt != 0)
 616                 {
 617                 amt = CLAMP(amt, 0 - sd->max_step, sd->max_step);
 618
 619                 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)))
 620                         {
 621                         /* only notify when scrolling is needed */
 622                         if (sd->notify_func && !sd->notify_func(sd->widget, x, y, sd->notify_data))
 623                                 {
 624                                 sd->timer_id = 0;
 625                                 widget_auto_scroll_stop(sd->widget);
 626                                 return FALSE;
 627                                 }
 628
 629                         gtk_adjustment_set_value(sd->adj,
 630                                 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)));
 631                         }
 632                 }
 633
 634         return TRUE;
 635 }
 636
 637 gint widget_auto_scroll_start(GtkWidget *widget, GtkAdjustment *v_adj, gint scroll_speed, gint region_size,
 638                               gint (*notify_func)(GtkWidget *widget, gint x, gint y, gpointer data), gpointer notify_data)
 639 {
 640         AutoScrollData *sd;
 641
 642         if (!widget || !v_adj) return 0;
 643         if (g_object_get_data(G_OBJECT(widget), "autoscroll")) return 0;
 644         if (scroll_speed < 1) scroll_speed = AUTO_SCROLL_DEFAULT_SPEED;
 645         if (region_size < 1) region_size = AUTO_SCROLL_DEFAULT_REGION;
 646
 647         sd = g_new0(AutoScrollData, 1);
 648         sd->widget = widget;
 649         sd->adj = v_adj;
 650         sd->region_size = region_size;
 651         sd->max_step = 1;
 652         sd->timer_id = g_timeout_add(scroll_speed, widget_auto_scroll_cb, sd);
 653
 654         sd->notify_func = notify_func;
 655         sd->notify_data = notify_data;
 656
 657         g_object_set_data(G_OBJECT(widget), "autoscroll", sd);
 658
 659         return scroll_speed;
 660 }
 661
 662
 663 /*
 664  *-------------------------------------------------------------------
 665  * GList utils
 666  *-------------------------------------------------------------------
 667  */
 668
 669 GList *uig_list_insert_link(GList *list, GList *link, gpointer data)
 670 {
 671         GList *new_list;
 672
 673         if (!list || link == list) return g_list_prepend(list, data);
 674         if (!link) return g_list_append(list, data);
 675
 676         new_list = g_list_alloc();
 677         new_list->data = data;
 678
 679         if (link->prev)
 680                 {
 681                 link->prev->next = new_list;
 682                 new_list->prev = link->prev;
 683                 }
 684         else
 685                 {
 686                 list = new_list;
 687                 }
 688         link->prev = new_list;
 689         new_list->next = link;
 690
 691         return list;
 692 }
 693
 694 GList *uig_list_insert_list(GList *parent, GList *insert_link, GList *list)
 695 {
 696         GList *end;
 697
 698         if (!insert_link) return g_list_concat(parent, list);
 699         if (insert_link == parent) return g_list_concat(list, parent);
 700         if (!parent) return list;
 701         if (!list) return parent;
 702
 703         end  = g_list_last(list);
 704
 705         if (insert_link->prev) insert_link->prev->next = list;
 706         list->prev = insert_link->prev;
 707         insert_link->prev = end;
 708         end->next = insert_link;
 709
 710         return parent;
 711 }
 712 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */