Edit File: clip_printw.c
/**************************************************************************** * Copyright (c) 2008 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /* * $Id: clip_printw.c,v 1.1 2008/12/20 21:03:06 tom Exp $ * * demonstrate how to use printw without wrapping. */ #include <test.priv.h> #define SHOW(n) ((n) == ERR ? "ERR" : "OK") #define COLOR_DEFAULT (-1) typedef struct { unsigned c; unsigned v; int status; int pair; unsigned attr; int count; int ch; const char *c_msg; const char *v_msg; int y_val; int x_val; int y_beg, x_beg; int y_max, x_max; } STATUS; static int clip_wprintw(WINDOW *win, const char *fmt,...) { int y0, x0, y1, x1, width; WINDOW *sub; va_list ap; int rc; /* * Allocate a single-line derived window extending from the current * cursor position to the end of the current line in the given window. * Disable scrolling in the derived window. */ getyx(win, y0, x0); width = getmaxx(win) - x0; sub = derwin(win, 1, width, y0, x0); scrollok(sub, FALSE); /* * Print the text. */ va_start(ap, fmt); rc = vw_printw(sub, fmt, ap); va_end(ap); getyx(sub, y1, x1); delwin(sub); wmove(win, y1 + y0, x1 + x0); return rc; } static const char * color_params(unsigned state, int *pair) { /* *INDENT-OFF* */ static struct { int pair; int fg, bg; const char *msg; } table[] = { { 0, COLOR_DEFAULT, COLOR_DEFAULT, "default" }, { 1, COLOR_RED, COLOR_BLACK, "red/black" }, { 2, COLOR_WHITE, COLOR_BLUE, "white/blue" }, }; /* *INDENT-ON* */ static bool first = TRUE; const char *result = 0; if (has_colors()) { if (first) { unsigned n; start_color(); for (n = 0; n < SIZEOF(table); ++n) { init_pair(table[n].pair, table[n].fg, table[n].bg); } } if (state < SIZEOF(table)) { *pair = table[state].pair; result = table[state].msg; } } return result; } static const char * video_params(unsigned state, unsigned *attr) { /* *INDENT-OFF* */ static struct { unsigned attr; const char *msg; } table[] = { { A_NORMAL, "normal" }, { A_BOLD, "bold" }, { A_REVERSE, "reverse" }, { A_UNDERLINE, "underline" }, { A_BLINK, "blink" }, }; /* *INDENT-ON* */ const char *result = 0; if (state < SIZEOF(table)) { *attr = table[state].attr; result = table[state].msg; } return result; } /* fill the window with a test-pattern */ static void fill_window(WINDOW *win) { int y, x; getyx(win, y, x); wmove(win, 0, 0); while (waddstr(win, "0123456789 abcdefghijklmnopqrstuvwxyz ") != ERR) { } wmove(win, y, x); } static void show_status(WINDOW *win, STATUS * sp) { int y, x; getyx(win, y, x); wmove(win, 0, 0); wprintw(win, "Count %d", sp->count); if (sp->v_msg != 0) wprintw(win, " Video %s", sp->v_msg); if (sp->c_msg != 0) wprintw(win, " Color %s", sp->c_msg); wprintw(win, " (%d)", sp->status); wclrtoeol(win); wmove(win, y, x); } static void do_subwindow(WINDOW *win, STATUS * sp, void func(WINDOW *)) { WINDOW *win1 = newwin(sp->y_max - 2, sp->x_max - 2, sp->y_beg + 1, sp->x_beg + 1); if (win1 != 0 && sp->y_max > 4 && sp->x_max > 4) { WINDOW *win2 = derwin(win1, sp->y_max - 4, sp->x_max - 4, 1, 1); if (win2 != 0) { box(win1, 0, 0); wrefresh(win1); func(win2); delwin(win2); } else { beep(); } delwin(win1); touchwin(win); } else { beep(); } } static void init_status(WINDOW *win, STATUS * sp) { memset(sp, 0, sizeof(*sp)); sp->c = 99; sp->v = 99; sp->ch = ' '; keypad(win, TRUE); fill_window(win); getbegyx(win, sp->y_beg, sp->x_beg); getmaxyx(win, sp->y_max, sp->x_max); } static void show_help(WINDOW *win) { static const char *table[] = { "Basic commands:" ,"Use h/j/k/l or arrow keys to move the cursor." ,"Set the count parameter for clip_wprintw by entering digits 0-9." ,"" ,"Other commands:" ,"space toggles through the set of video attributes and colors." ,"t touches (forces repaint) of the current line." ,". calls clip_wprintw at the current position with the given count." ,"= resets count to zero." ,"? shows this help-window" ,"" }; int y_max, x_max; int row; getmaxyx(win, y_max, x_max); for (row = 0; row < (int) SIZEOF(table) && row < y_max; ++row) { mvwprintw(win, row, 0, "%.*s", x_max, table[row]); } while (wgetch(win) != 'q') beep(); } static void update_status(WINDOW *win, STATUS * sp) { switch (sp->ch) { case ' ': /* next test-iteration */ if (has_colors()) { if ((sp->c_msg = color_params(++(sp->c), &(sp->pair))) == 0) { sp->c_msg = color_params(sp->c = 0, &(sp->pair)); if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) { sp->v_msg = video_params(sp->v = 0, &(sp->attr)); } } } else { if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) { sp->v_msg = video_params(sp->v = 0, &(sp->attr)); } } sp->count = 0; show_status(win, sp); break; case KEY_LEFT: case 'h': if (sp->x_val > 0) wmove(win, sp->y_val, --(sp->x_val)); break; case KEY_DOWN: case 'j': if (sp->y_val < sp->y_max) wmove(win, ++(sp->y_val), sp->x_val); break; case KEY_UP: case 'k': if (sp->y_val > 0) wmove(win, --(sp->y_val), sp->x_val); break; case KEY_RIGHT: case 'l': if (sp->x_val < sp->x_max) wmove(win, sp->y_val, ++(sp->x_val)); break; case 't': touchline(win, sp->y_val, 1); break; case '=': sp->count = 0; show_status(win, sp); break; case '?': do_subwindow(win, sp, show_help); break; default: if (isdigit(sp->ch)) { sp->count = (sp->count * 10) + (sp->ch - '0'); show_status(win, sp); } else { beep(); } break; } } static void test_clipping(WINDOW *win) { STATUS st; char fmt[80]; char *buffer; unsigned j, need; init_status(win, &st); do { switch (st.ch) { case '.': /* change from current position */ wattrset(win, st.attr | COLOR_PAIR(st.pair)); if (st.count > 0) { need = st.count + 1; sprintf(fmt, "%%c%%%ds%%c", st.count); } else { need = getmaxx(win) - 1; strcpy(fmt, "%c%s%c"); } if ((buffer = typeMalloc(char, need)) != 0) { for (j = 0; j < need; ++j) { buffer[j] = 'A' + (j % 26); } buffer[need - 1] = '\0'; st.status = clip_wprintw(win, fmt, '[', buffer, ']'); } break; case 'w': do_subwindow(win, &st, test_clipping); break; case 'q': return; default: update_status(win, &st); break; } } while ((st.ch = wgetch(win)) != ERR); } int main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED) { initscr(); cbreak(); noecho(); test_clipping(stdscr); endwin(); ExitProgram(EXIT_SUCCESS); }
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