/* * $Id: fselect.c,v 1.44 2004/09/18 16:36:40 tom Exp $ * * fselect.c -- implements the file-selector box * * Copyright 2000-2003,2004 Thomas E. Dickey * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "dialog.h" #include #include #if HAVE_DIRENT_H # include # define NAMLEN(dirent) strlen((dirent)->d_name) #else # define dirent direct # define NAMLEN(dirent) (dirent)->d_namlen # if HAVE_SYS_NDIR_H # include # endif # if HAVE_SYS_DIR_H # include # endif # if HAVE_NDIR_H # include # endif #endif #define EXT_WIDE 1 #define HDR_HIGH 1 #define BTN_HIGH (1 + 2 * MARGIN) /* Ok/Cancel, also input-box */ #define MIN_HIGH (HDR_HIGH - MARGIN + (BTN_HIGH * 2) + 4 * MARGIN) #define MIN_WIDE (2 * MAX(strlen(d_label), strlen(f_label)) + 6 * MARGIN + 2 * EXT_WIDE) #define MOUSE_D (KEY_MAX + 0) #define MOUSE_F (KEY_MAX + 10000) #define MOUSE_T (KEY_MAX + 20000) typedef enum { sDIRS = -3 ,sFILES = -2 ,sTEXT = -1 } STATES; typedef struct { WINDOW *par; /* parent window */ WINDOW *win; /* this window */ int length; /* length of the data[] array */ int offset; /* index of first item on screen */ int choice; /* index of the selection */ int mousex; /* base of mouse-code return-values */ unsigned allocd; char **data; } LIST; static void init_list(LIST * list, WINDOW *par, WINDOW *win, int mousex) { list->par = par; list->win = win; list->length = 0; list->offset = 0; list->choice = 0; list->mousex = mousex; list->allocd = 0; list->data = 0; dlg_mouse_mkbigregion(getbegy(win), getbegx(win), getmaxy(win), getmaxx(win), mousex, 1, 1, 1 /* by lines */ ); } static char * leaf_of(char *path) { char *leaf = strrchr(path, '/'); if (leaf != 0) leaf++; else leaf = path; return leaf; } static char * data_of(LIST * list) { if (list != 0 && list->data != 0) return list->data[list->choice]; return 0; } static void free_list(LIST * list, int reinit) { int n; if (list->data != 0) { for (n = 0; list->data[n] != 0; n++) free(list->data[n]); free(list->data); list->data = 0; } if (reinit) init_list(list, list->par, list->win, list->mousex); } static void add_to_list(LIST * list, char *text) { unsigned need; need = list->length + 1; if (need + 1 > list->allocd) { list->allocd = 2 * (need + 1); if (list->data == 0) { list->data = (char **) malloc(sizeof(char *) * list->allocd); } else { list->data = (char **) realloc(list->data, sizeof(char *) * list->allocd); } assert_ptr(list->data, "add_to_list"); } list->data[list->length++] = dlg_strclone(text); list->data[list->length] = 0; } static void keep_visible(LIST * list) { int high = getmaxy(list->win); if (list->choice < list->offset) { list->offset = list->choice; } if (list->choice - list->offset >= high) list->offset = list->choice - high + 1; } #define Value(c) (int)((c) & 0xff) static int find_choice(char *target, LIST * list) { int n; int choice = list->choice; int len_1, len_2, cmp_1, cmp_2; if (*target == 0) { list->choice = 0; } else { /* find the match with the longest length. If more than one has the * same length, choose the one with the closest match of the final * character. */ len_1 = 0; cmp_1 = 256; for (n = 0; n < list->length; n++) { char *a = target; char *b = list->data[n]; len_2 = 0; while ((*a != 0) && (*b != 0) && (*a == *b)) { a++; b++; len_2++; } cmp_2 = Value(*a) - Value(*b); if (cmp_2 < 0) cmp_2 = -cmp_2; if ((len_2 > len_1) || (len_1 == len_2 && cmp_2 < cmp_1)) { len_1 = len_2; cmp_1 = cmp_2; list->choice = n; } } } if (choice != list->choice) { keep_visible(list); } return (choice != list->choice); } static void display_list(LIST * list) { int n; int x; int y; int top; int bottom; dlg_attr_clear(list->win, getmaxy(list->win), getmaxx(list->win), item_attr); for (n = list->offset; n < list->length && list->data[n]; n++) { y = n - list->offset; if (y >= getmaxy(list->win)) break; (void) wmove(list->win, y, 0); if (n == list->choice) wattrset(list->win, item_selected_attr); (void) waddstr(list->win, list->data[n]); wattrset(list->win, item_attr); } wattrset(list->win, item_attr); getparyx(list->win, y, x); top = y - 1; bottom = y + getmaxy(list->win); dlg_draw_arrows(list->par, list->offset, list->length - list->offset > getmaxy(list->win), x + 1, top, bottom); (void) wmove(list->win, list->choice - list->offset, 0); (void) wnoutrefresh(list->win); } /* FIXME: see arrows.c * This workaround is used to allow two lists to have scroll-tabs at the same * time, by reassigning their return-values to be different. Just for * readability, we use the names of keys with similar connotations, though all * that is really required is that they're distinct, so we can put them in a * switch statement. */ static void fix_arrows(LIST * list) { int x; int y; int top; int bottom; getparyx(list->win, y, x); top = y - 1; bottom = y + getmaxy(list->win); mouse_mkbutton(top, x, 6, ((list->mousex == MOUSE_D) ? KEY_PREVIOUS : KEY_PPAGE)); mouse_mkbutton(bottom, x, 6, ((list->mousex == MOUSE_D) ? KEY_NEXT : KEY_NPAGE)); } static int show_list(char *target, LIST * list, bool keep) { int changed = keep || find_choice(target, list); display_list(list); return changed; } /* * Highlight the closest match to 'target' in the given list, setting offset * to match. */ static int show_both_lists(char *input, LIST * d_list, LIST * f_list, bool keep) { char *leaf = leaf_of(input); return show_list(leaf, d_list, keep) | show_list(leaf, f_list, keep); } /* * Move up/down in the given list */ static bool change_list(int choice, LIST * list) { if (data_of(list) != 0) { int last = list->length - 1; choice += list->choice; if (choice < 0) choice = 0; if (choice > last) choice = last; list->choice = choice; keep_visible(list); display_list(list); return TRUE; } return FALSE; } static void scroll_list(int direction, LIST * list) { if (data_of(list) != 0) { int length = getmaxy(list->win); if (change_list(direction * length, list)) return; } beep(); } static int compar(const void *a, const void *b) { return strcmp(*(const char *const *) a, *(const char *const *) b); } static bool fill_lists(char *current, char *input, LIST * d_list, LIST * f_list, bool keep) { DIR *dp; struct dirent *de; struct stat sb; int n; char path[MAX_LEN + 1]; char *leaf; /* check if we've updated the lists */ for (n = 0; current[n] && input[n]; n++) { if (current[n] != input[n]) break; } if (current[n] == input[n]) return FALSE; if (strchr(current + n, '/') == 0 && strchr(input + n, '/') == 0) { return show_both_lists(input, d_list, f_list, keep); } strcpy(current, input); /* refill the lists */ free_list(d_list, TRUE); free_list(f_list, TRUE); strcpy(path, current); if ((leaf = strrchr(path, '/')) != 0) { *++leaf = 0; } else { strcpy(path, "./"); leaf = path + strlen(path); } if ((dp = opendir(path)) != 0) { while ((de = readdir(dp)) != 0) { strncpy(leaf, de->d_name, NAMLEN(de))[NAMLEN(de)] = 0; if (stat(path, &sb) == 0) { if ((sb.st_mode & S_IFMT) == S_IFDIR) add_to_list(d_list, leaf); else add_to_list(f_list, leaf); } } (void) closedir(dp); /* sort the lists */ qsort(d_list->data, d_list->length, sizeof(d_list->data[0]), compar); qsort(f_list->data, f_list->length, sizeof(f_list->data[0]), compar); } (void) show_both_lists(input, d_list, f_list, FALSE); d_list->offset = d_list->choice; f_list->offset = f_list->choice; return TRUE; } static bool usable_state(STATES state, LIST * dirs, LIST * files) { bool result; switch (state) { case sDIRS: result = (data_of(dirs) != 0); break; case sFILES: result = (data_of(files) != 0); break; default: result = TRUE; break; } return result; } #define which_list() ((state == sFILES) \ ? &f_list \ : ((state == sDIRS) \ ? &d_list \ : 0)) /* * Display a dialog box for entering a filename */ int dialog_fselect(const char *title, const char *path, int height, int width) { int tbox_y, tbox_x, tbox_width, tbox_height; int dbox_y, dbox_x, dbox_width, dbox_height; int fbox_y, fbox_x, fbox_width, fbox_height; int show_buttons = TRUE; int offset = 0; int key = 0; int fkey = FALSE; int code; int result = DLG_EXIT_UNKNOWN; int state = dialog_vars.defaultno ? dlg_defaultno_button() : sTEXT; int button = state; int first = (state == sTEXT); char *input = dialog_vars.input_result; char *completed; char current[MAX_LEN + 1]; WINDOW *dialog, *w_text, *w_dir, *w_file; const char **buttons = dlg_ok_labels(); char *d_label = _("Directories"); char *f_label = _("Files"); int min_wide = MIN_WIDE; int min_items = height ? 0 : 4; LIST d_list, f_list; dlg_does_output(); dlg_auto_size(title, (char *) 0, &height, &width, 6, 25); height += MIN_HIGH + min_items; if (width < min_wide) width = min_wide; dlg_print_size(height, width); dlg_ctl_size(height, width); dialog = dlg_new_window(height, width, dlg_box_y_ordinate(height), dlg_box_x_ordinate(width)); dlg_mouse_setbase(0, 0); dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr); dlg_draw_bottom_box(dialog); dlg_draw_title(dialog, title); wattrset(dialog, dialog_attr); /* Draw the input field box */ tbox_height = 1; tbox_width = width - (4 * MARGIN + 2); tbox_y = height - (BTN_HIGH * 2) + MARGIN; tbox_x = (width - tbox_width) / 2; w_text = derwin(dialog, tbox_height, tbox_width, tbox_y, tbox_x); if (w_text == 0) return DLG_EXIT_ERROR; (void) keypad(w_text, TRUE); dlg_draw_box(dialog, tbox_y - MARGIN, tbox_x - MARGIN, (2 * MARGIN + 1), tbox_width + (MARGIN + EXT_WIDE), menubox_border_attr, menubox_attr); dlg_mouse_mkbigregion(getbegy(dialog) + tbox_y - MARGIN, getbegx(dialog) + tbox_x - MARGIN, 1 + (2 * MARGIN), tbox_width + (MARGIN + EXT_WIDE), MOUSE_T, 1, 1, 3 /* doesn't matter */ ); /* Draw the directory listing box */ dbox_height = height - MIN_HIGH; dbox_width = (width - (6 * MARGIN + 2 * EXT_WIDE)) / 2; dbox_y = (2 * MARGIN + 1); dbox_x = tbox_x; w_dir = derwin(dialog, dbox_height, dbox_width, dbox_y, dbox_x); if (w_dir == 0) return DLG_EXIT_ERROR; (void) keypad(w_dir, TRUE); (void) mvwprintw(dialog, dbox_y - (MARGIN + 1), dbox_x - MARGIN, d_label); dlg_draw_box(dialog, dbox_y - MARGIN, dbox_x - MARGIN, dbox_height + (MARGIN + 1), dbox_width + (MARGIN + 1), menubox_border_attr, menubox_attr); init_list(&d_list, dialog, w_dir, MOUSE_D); /* Draw the filename listing box */ fbox_height = dbox_height; fbox_width = dbox_width; fbox_y = dbox_y; fbox_x = tbox_x + dbox_width + (2 * MARGIN); w_file = derwin(dialog, fbox_height, fbox_width, fbox_y, fbox_x); if (w_file == 0) return DLG_EXIT_ERROR; (void) keypad(w_file, TRUE); (void) mvwprintw(dialog, fbox_y - (MARGIN + 1), fbox_x - MARGIN, f_label); dlg_draw_box(dialog, fbox_y - MARGIN, fbox_x - MARGIN, fbox_height + (MARGIN + 1), fbox_width + (MARGIN + 1), menubox_border_attr, menubox_attr); init_list(&f_list, dialog, w_file, MOUSE_F); /* Set up the initial value */ strcpy(input, path); offset = strlen(input); *current = 0; while (result == DLG_EXIT_UNKNOWN) { int edit = 0; if (fill_lists(current, input, &d_list, &f_list, state < sTEXT)) show_buttons = TRUE; /* * The last field drawn determines where the cursor is shown: */ if (show_buttons) { show_buttons = FALSE; button = (state < 0) ? 0 : state; dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width); } if (state < 0) { switch (state) { case sTEXT: dlg_set_focus(dialog, w_text); break; case sFILES: dlg_set_focus(dialog, w_file); break; case sDIRS: dlg_set_focus(dialog, w_dir); break; } } if (first) { (void) wrefresh(dialog); } else { fix_arrows(&d_list); fix_arrows(&f_list); key = dlg_mouse_wgetch(dialog, &fkey); } if (!fkey) { fkey = TRUE; switch (key) { case ESC: result = DLG_EXIT_ESC; fkey = FALSE; break; case '\n': case '\r': key = KEY_ENTER; break; case ' ': key = KEY_SELECT; break; case TAB: key = KEY_RIGHT; break; case 0: break; default: fkey = FALSE; break; } } if (fkey) { switch (key) { case M_EVENT + KEY_PREVIOUS: state = sDIRS; scroll_list(-1, which_list()); continue; case M_EVENT + KEY_NEXT: state = sDIRS; scroll_list(1, which_list()); continue; case M_EVENT + KEY_PPAGE: state = sFILES; scroll_list(-1, which_list()); continue; case M_EVENT + KEY_NPAGE: state = sFILES; scroll_list(1, which_list()); continue; case KEY_PPAGE: scroll_list(-1, which_list()); continue; case KEY_NPAGE: scroll_list(1, which_list()); continue; case KEY_UP: if (change_list(-1, which_list())) continue; /* FALLTHRU */ case KEY_LEFT: case KEY_BTAB: show_buttons = TRUE; do { state = dlg_prev_ok_buttonindex(state, sDIRS); } while (!usable_state(state, &d_list, &f_list)); continue; case KEY_DOWN: if (change_list(1, which_list())) continue; /* FALLTHRU */ case KEY_RIGHT: show_buttons = TRUE; do { state = dlg_next_ok_buttonindex(state, sDIRS); } while (!usable_state(state, &d_list, &f_list)); continue; case KEY_SELECT: completed = 0; if (state == sFILES) { completed = data_of(&f_list); } else if (state == sDIRS) { completed = data_of(&d_list); } if (completed != 0) { state = sTEXT; show_buttons = TRUE; strcpy(leaf_of(input), completed); offset = strlen(input); dlg_show_string(w_text, input, offset, inputbox_attr, 0, 0, tbox_width, 0, first); continue; } else if (state < sTEXT) { (void) beep(); continue; } /* FALLTHRU */ case KEY_ENTER: result = (state > 0) ? dlg_ok_buttoncode(state) : DLG_EXIT_OK; continue; default: if (key >= M_EVENT + MOUSE_T) { state = sTEXT; continue; } else if (key >= M_EVENT + MOUSE_F) { state = sFILES; f_list.choice = (key - (M_EVENT + MOUSE_F)) + f_list.offset; display_list(&f_list); continue; } else if (key >= M_EVENT + MOUSE_D) { state = sDIRS; d_list.choice = (key - (M_EVENT + MOUSE_D)) + d_list.offset; display_list(&d_list); continue; } else if (key >= M_EVENT && (code = dlg_ok_buttoncode(key - M_EVENT)) >= 0) { result = code; continue; } break; } } if (state < 0) { /* Input box selected if we're editing */ edit = dlg_edit_string(input, &offset, key, fkey, first); if (edit) { dlg_show_string(w_text, input, offset, inputbox_attr, 0, 0, tbox_width, 0, first); first = FALSE; state = sTEXT; } } else if (state >= 0 && (code = dlg_char_to_button(key, buttons)) >= 0) { result = code; break; } } dlg_del_window(dialog); dlg_mouse_free_regions(); free_list(&d_list, FALSE); free_list(&f_list, FALSE); return result; }