1/* 2 * widget.c - handles widget objects and the widget stack 3 * Copyright (c) Clemens Ladisch <clemens@ladisch.de> 4 * 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19#include "aconfig.h" 20#include <stdlib.h> 21#include <term.h> 22#include <unistd.h> 23#include <sys/ioctl.h> 24#include "die.h" 25#include "widget.h" 26 27int screen_lines; 28int screen_cols; 29 30static int cursor_visibility = -1; 31 32static void update_cursor_visibility(void) 33{ 34 const struct widget *active_widget; 35 36 active_widget = get_active_widget(); 37 if (active_widget && 38 active_widget->cursor_visibility != cursor_visibility) { 39 cursor_visibility = active_widget->cursor_visibility; 40 curs_set(cursor_visibility); 41 } 42} 43 44void widget_init(struct widget *widget, int lines_, int cols, int y, int x, 45 chtype bkgd, unsigned int flags) 46{ 47 WINDOW *old_window; 48 49 if (y == SCREEN_CENTER) 50 y = (screen_lines - lines_) / 2; 51 if (x == SCREEN_CENTER) 52 x = (screen_cols - cols) / 2; 53 54 old_window = widget->window; 55 widget->window = newwin(lines_, cols, y, x); 56 if (!widget->window) 57 fatal_error("cannot create window"); 58 keypad(widget->window, TRUE); 59 nodelay(widget->window, TRUE); 60 leaveok(widget->window, !(flags & WIDGET_CURSOR_VISIBLE)); 61 wbkgdset(widget->window, bkgd); 62 werase(widget->window); 63 64 if (flags & WIDGET_BORDER) 65 box(widget->window, 0, 0); 66 if (flags & WIDGET_SUBWINDOW) { 67 if (widget->subwindow) 68 delwin(widget->subwindow); 69 widget->subwindow = derwin(widget->window, 70 lines_ - 2, cols - 2, 1, 1); 71 if (!widget->subwindow) 72 fatal_error("cannot create subwindow"); 73 wbkgdset(widget->subwindow, bkgd); 74 } 75 widget->cursor_visibility = !!(flags & WIDGET_CURSOR_VISIBLE); 76 77 if (widget->panel) { 78 replace_panel(widget->panel, widget->window); 79 } else { 80 widget->panel = new_panel(widget->window); 81 if (!widget->panel) 82 fatal_error("cannot create panel"); 83 set_panel_userptr(widget->panel, widget); 84 } 85 86 if (old_window) 87 delwin(old_window); 88 89 update_cursor_visibility(); 90} 91 92void widget_free(struct widget *widget) 93{ 94 if (widget->panel) { 95 del_panel(widget->panel); 96 widget->panel = NULL; 97 } 98 if (widget->subwindow) { 99 delwin(widget->subwindow); 100 widget->subwindow = NULL; 101 } 102 if (widget->window) { 103 delwin(widget->window); 104 widget->window = NULL; 105 } 106 107 update_cursor_visibility(); 108} 109 110const struct widget *get_active_widget(void) 111{ 112 PANEL *active_panel; 113 114 active_panel = panel_below(NULL); 115 if (active_panel) 116 return panel_userptr(active_panel); 117 else 118 return NULL; 119} 120 121void window_size_changed(void) 122{ 123 PANEL *panel, *below; 124 const struct widget *widget; 125 struct winsize size; 126 127 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) == 0) 128 resize_term(size.ws_row, size.ws_col); 129 130 getmaxyx(stdscr, screen_lines, screen_cols); 131 if (tigetflag("xenl") != 1 && tigetflag("am") != 1) 132 --screen_lines; 133 134 for (panel = panel_below(NULL); panel; panel = below) { 135 below = panel_below(panel); 136 widget = panel_userptr(panel); 137 widget->window_size_changed(); 138 } 139} 140