/* * input_win.c * * Copyright (C) 2012 James Booth * * This file is part of Profanity. * * Profanity 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 3 of the License, or * (at your option) any later version. * * Profanity 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 Profanity. If not, see . * */ /* * Non blocking input char handling * * *size - holds the current size of input * *input - holds the current input string, NOT null terminated at this point * *ch - getch will put a charater here if there was any input * * The example below shows the values of size, input, a call to wgetyx to * find the current cursor location, and the index of the input string. * * view : |mple| * input : "example te" * index : "0123456789" * inp_x : "0123456789" * size : 10 * pad_start : 3 * cols : 4 */ #define _XOPEN_SOURCE_EXTENDED #include "config.h" #include #include #include #ifdef HAVE_NCURSESW_NCURSES_H #include #elif HAVE_NCURSES_H #include #endif #include "common.h" #include "command.h" #include "contact_list.h" #include "history.h" #include "log.h" #include "preferences.h" #include "profanity.h" #include "theme.h" #include "ui.h" static WINDOW *inp_win; static int pad_start = 0; static int _handle_edit(const wint_t ch, char *input, int *size); static int _printable(const wint_t ch); static gboolean _special_key(const wint_t ch); static void _inp_clear_no_pad(void); void create_input_window(void) { #ifdef NCURSES_REENTRANT set_escdelay(25); #else ESCDELAY = 25; #endif int rows, cols; getmaxyx(stdscr, rows, cols); inp_win = newpad(1, INP_WIN_MAX); wbkgd(inp_win, COLOUR_INPUT_TEXT); keypad(inp_win, TRUE); wmove(inp_win, 0, 0); prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } void inp_win_resize(const char * const input, const int size) { int rows, cols, inp_x; getmaxyx(stdscr, rows, cols); inp_x = getcurx(inp_win); // if lost cursor off screen, move contents to show it if (inp_x >= pad_start + cols) { pad_start = inp_x - (cols / 2); if (pad_start < 0) { pad_start = 0; } } prefresh(inp_win, pad_start, 0, rows-1, 0, rows-1, cols-1); } void inp_clear(void) { int rows, cols; getmaxyx(stdscr, rows, cols); _inp_clear_no_pad(); pad_start = 0; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } void inp_non_block(void) { wtimeout(inp_win, 20); } void inp_block(void) { wtimeout(inp_win, -1); } wint_t inp_get_char(char *input, int *size) { int inp_y = 0; int inp_x = 0; int i; wint_t ch; int display_size = 0; if (*size != 0) { display_size = g_utf8_strlen(input, *size); } // echo off, and get some more input noecho(); wget_wch(inp_win, &ch); gboolean in_command = FALSE; if ((display_size > 0 && input[0] == '/') || (display_size == 0 && ch == '/')) { in_command = TRUE; } if (prefs_get_states()) { if (ch == ERR) { prof_handle_idle(); } if (prefs_get_outtype() && (ch != ERR) && !in_command && _printable(ch)) { prof_handle_activity(); } } // if it wasn't an arrow key etc if (!_handle_edit(ch, input, size)) { if (_printable(ch)) { getyx(inp_win, inp_y, inp_x); // handle insert if not at end of input if (inp_x < display_size) { char bytes[MB_CUR_MAX]; size_t utf_len = wcrtomb(bytes, ch, NULL); char *next_ch = g_utf8_offset_to_pointer(input, inp_x); char *offset; for (offset = &input[*size - 1]; offset >= next_ch; offset--) { *(offset + utf_len) = *offset; } for (i = 0; i < utf_len; i++) { *(next_ch + i) = bytes[i]; } *size += utf_len; input[*size] = '\0'; wprintw(inp_win, next_ch); wmove(inp_win, inp_y, inp_x + 1); // otherwise just append } else { char bytes[MB_CUR_MAX]; size_t utf_len = wcrtomb(bytes, ch, NULL); for (i = 0 ; i < utf_len; i++) { input[(*size)++] = bytes[i]; } input[*size] = '\0'; _inp_clear_no_pad(); wprintw(inp_win, input); display_size++; // if gone over screen size follow input int rows, cols; getmaxyx(stdscr, rows, cols); if (display_size - pad_start > cols-2) { pad_start++; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } } cmd_reset_autocomplete(); } } echo(); return ch; } void inp_get_password(char *passwd) { int rows, cols; getmaxyx(stdscr, rows, cols); wclear(inp_win); prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); noecho(); mvwgetnstr(inp_win, 0, 1, passwd, 20); wmove(inp_win, 0, 0); echo(); status_bar_clear(); } void inp_put_back(void) { int rows, cols; getmaxyx(stdscr, rows, cols); prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } int inp_get_next_char(void) { return wgetch(inp_win); } void inp_replace_input(char *input, const char * const new_input, int *size) { strcpy(input, new_input); *size = strlen(input); inp_clear(); input[*size] = '\0'; wprintw(inp_win, input); } /* * Deal with command editing, return 1 if ch was an edit * key press: up, down, left, right or backspace * return 0 if it wasnt */ static int _handle_edit(const wint_t ch, char *input, int *size) { int rows, cols; char *prev = NULL; char *next = NULL; int inp_y = 0; int inp_x = 0; int next_ch; int display_size = 0; if (*size != 0) { display_size = g_utf8_strlen(input, *size); } getmaxyx(stdscr, rows, cols); getyx(inp_win, inp_y, inp_x); switch(ch) { case 27: // ESC // check for ALT-num next_ch = inp_get_next_char(); if (next_ch != ERR) { switch (next_ch) { case '1': ui_switch_win(0); break; case '2': ui_switch_win(1); break; case '3': ui_switch_win(2); break; case '4': ui_switch_win(3); break; case '5': ui_switch_win(4); break; case '6': ui_switch_win(5); break; case '7': ui_switch_win(6); break; case '8': ui_switch_win(7); break; case '9': ui_switch_win(8); break; case '0': ui_switch_win(9); break; default: break; } return 1; } else { *size = 0; inp_clear(); return 1; } case 127: case KEY_BACKSPACE: contact_list_reset_search_attempts(); if (display_size > 0) { // if at end, delete last char if (inp_x >= display_size) { gchar *start = g_utf8_substring(input, 0, inp_x-1); for (*size = 0; *size < strlen(start); (*size)++) { input[*size] = start[*size]; } input[*size] = '\0'; g_free(start); _inp_clear_no_pad(); wprintw(inp_win, input); wmove(inp_win, 0, inp_x -1); // if in middle, delete and shift chars left } else if (inp_x > 0 && inp_x < display_size) { gchar *start = g_utf8_substring(input, 0, inp_x - 1); gchar *end = g_utf8_substring(input, inp_x, *size); GString *new = g_string_new(start); g_string_append(new, end); for (*size = 0; *size < strlen(new->str); (*size)++) { input[*size] = new->str[*size]; } input[*size] = '\0'; g_free(start); g_free(end); g_string_free(new, FALSE); _inp_clear_no_pad(); wprintw(inp_win, input); wmove(inp_win, 0, inp_x -1); } // if gone off screen to left, jump left (half a screen worth) if (inp_x <= pad_start) { pad_start = pad_start - (cols / 2); if (pad_start < 0) { pad_start = 0; } prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } } return 1; case KEY_DC: // DEL if (inp_x == display_size-1) { gchar *start = g_utf8_substring(input, 0, inp_x); for (*size = 0; *size < strlen(start); (*size)++) { input[*size] = start[*size]; } input[*size] = '\0'; g_free(start); _inp_clear_no_pad(); wprintw(inp_win, input); } else if (inp_x < display_size-1) { gchar *start = g_utf8_substring(input, 0, inp_x); gchar *end = g_utf8_substring(input, inp_x+1, *size); GString *new = g_string_new(start); g_string_append(new, end); for (*size = 0; *size < strlen(new->str); (*size)++) { input[*size] = new->str[*size]; } input[*size] = '\0'; g_free(start); g_free(end); g_string_free(new, FALSE); _inp_clear_no_pad(); wprintw(inp_win, input); wmove(inp_win, 0, inp_x); } return 1; case KEY_LEFT: if (inp_x > 0) wmove(inp_win, inp_y, inp_x-1); // current position off screen to left if (inp_x - 1 < pad_start) { pad_start--; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } return 1; case KEY_RIGHT: if (inp_x < display_size) { wmove(inp_win, inp_y, inp_x+1); // current position off screen to right if ((inp_x + 1 - pad_start) >= cols) { pad_start++; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } } return 1; case KEY_UP: prev = history_previous(input, size); if (prev) { inp_replace_input(input, prev, size); display_size = g_utf8_strlen(input, *size); wmove(inp_win, inp_y, display_size); if (display_size > cols-2) { pad_start = display_size - cols + 1; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } } return 1; case KEY_DOWN: next = history_next(input, size); if (next) { inp_replace_input(input, next, size); display_size = g_utf8_strlen(input, *size); wmove(inp_win, inp_y, display_size); if (display_size > cols-2) { pad_start = display_size - cols + 1; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } } return 1; case KEY_HOME: wmove(inp_win, inp_y, 0); pad_start = 0; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); return 1; case KEY_END: wmove(inp_win, inp_y, display_size); if (display_size > cols-2) { pad_start = display_size - cols + 1; prefresh(inp_win, 0, pad_start, rows-1, 0, rows-1, cols-1); } return 1; case 9: // tab cmd_autocomplete(input, size); return 1; default: return 0; } } static int _printable(const wint_t ch) { return (ch != ERR && ch != '\n' && ch != KEY_PPAGE && ch != KEY_NPAGE && ch != KEY_MOUSE && ch != KEY_F(1) && ch != KEY_F(2) && ch != KEY_F(3) && ch != KEY_F(4) && ch != KEY_F(5) && ch != KEY_F(6) && ch != KEY_F(7) && ch != KEY_F(8) && ch != KEY_F(9) && ch != KEY_F(10) && ch!= KEY_F(11) && ch != KEY_F(12) && ch != KEY_IC && ch != KEY_EIC && ch != KEY_RESIZE && !_special_key(ch)); } static gboolean _special_key(const wint_t ch) { char *str = unctrl(ch); return ((strlen(str) > 1) && g_str_has_prefix(str, "^")); } static void _inp_clear_no_pad(void) { wclear(inp_win); wmove(inp_win, 0, 0); }