diff options
Diffstat (limited to 'lib/draw/curses.c')
| -rw-r--r-- | lib/draw/curses.c | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/lib/draw/curses.c b/lib/draw/curses.c deleted file mode 100644 index a1f23ef..0000000 --- a/lib/draw/curses.c +++ /dev/null @@ -1,498 +0,0 @@ -#include "../internal.h" - -#if __APPLE__ -# define _C99_SOURCE -# include <stdio.h> /* vsnprintf */ -# undef _C99_SOURCE -#endif - -#define _XOPEN_SOURCE 500 -#include <signal.h> /* sigaction */ -#include <stdarg.h> /* vsnprintf */ -#undef _XOPEN_SOURCE - -#include <wchar.h> -#include <unistd.h> -#include <string.h> -#include <stdlib.h> -#include <locale.h> -#include <ncurses.h> -#include <dlfcn.h> -#include <assert.h> - -#if _WIN32 -static const char *TTY = "CON"; -#else -static const char *TTY = "/dev/tty"; -#endif - -#if __APPLE__ - const char *DL_PATH[] = { - "libncursesw.5.dylib", - "libncurses.5.dylib", - NULL - }; -#elif _WIN32 -# error FIXME: Compile with windows... or use relative path? -#else - const char *DL_PATH[] = { - "libncursesw.so.5", - "libncurses.so.5", - NULL - }; -#endif - -/* these are implemented as macros in older curses */ -#ifndef NCURSES_OPAQUE -static int wrap_getmaxx(WINDOW *win) { return getmaxx(win); } -static int wrap_getmaxy(WINDOW *win) { return getmaxy(win); } -#endif - -/* ncurses.h likes to define stuff for us. - * This unforunately mangles with our struct. */ -#undef erase -#undef getch -#undef get_wch -#undef refresh -#undef mvprintw -#undef move -#undef init_pair -#undef attroff -#undef attron -#undef getmaxx -#undef getmaxy - -/** - * Dynamically loaded curses API. - */ -static struct curses { - struct sigaction abrtAction; - struct sigaction segvAction; - struct sigaction winchAction; - void *handle; - WINDOW *stdscr; - WINDOW* (*initscr)(void); - int (*endwin)(void); - int (*refresh)(void); - int (*erase)(void); - int (*getch)(void); - int (*get_wch)(wint_t *wch); - int (*mvprintw)(int x, int y, const char *fmt, ...); - int (*move)(int x, int y); - int (*init_pair)(short color, short f, short b); - int (*attroff)(int attrs); - int (*attron)(int attrs); - int (*start_color)(void); - int (*use_default_colors)(void); - int (*getmaxx)(WINDOW *win); - int (*getmaxy)(WINDOW *win); - int (*keypad)(WINDOW *win, bool bf); - int (*curs_set)(int visibility); - int (*flushinp)(void); - int (*noecho)(void); - int (*raw)(void); - int *ESCDELAY; - int oldStdin; - int oldStdout; -} curses; - -static int _bmDrawCursesResizeBuffer(char **buffer, size_t *osize, size_t nsize) -{ - assert(buffer); - assert(osize); - - if (nsize == 0 || nsize <= *osize) - return 0; - - void *tmp; - if (!*buffer || !(tmp = realloc(*buffer, nsize))) { - if (!(tmp = malloc(nsize))) - return 0; - - if (*buffer) { - memcpy(tmp, *buffer, *osize); - free(*buffer); - } - } - - *buffer = tmp; - *osize = nsize; - return 1; -} - -#if __GNUC__ -__attribute__((format(printf, 3, 4))) -#endif -static void _bmDrawCursesDrawLine(int pair, int y, const char *format, ...) -{ - static size_t blen = 0; - static char *buffer = NULL; - - size_t ncols = curses.getmaxx(curses.stdscr); - if (ncols <= 0) - return; - - va_list args; - va_start(args, format); - size_t nlen = vsnprintf(NULL, 0, format, args); - va_end(args); - - if ((!buffer || nlen > blen) && !_bmDrawCursesResizeBuffer(&buffer, &blen, nlen + 1)) - return; - - va_start(args, format); - vsnprintf(buffer, blen - 1, format, args); - va_end(args); - - size_t dw = 0, i = 0; - while (dw < ncols && i < nlen) { - if (buffer[i] == '\t') buffer[i] = ' '; - int next = _bmUtf8RuneNext(buffer, i); - dw += _bmUtf8RuneWidth(buffer + i, next); - i += (next ? next : 1); - } - - if (dw < ncols) { - /* line is too short, widen it */ - size_t offset = i + (ncols - dw); - if (blen <= offset && !_bmDrawCursesResizeBuffer(&buffer, &blen, offset + 1)) - return; - - memset(buffer + nlen, ' ', offset - nlen); - buffer[offset] = 0; - } else if (i < blen) { - /* line is too long, shorten it */ - i -= _bmUtf8RunePrev(buffer, i - (dw - ncols)) - 1; - size_t cc = dw - (dw - ncols); - - size_t offset = i - (dw - ncols) + (ncols - cc) + 1; - if (blen <= offset) { - int diff = offset - blen + 1; - if (!_bmDrawCursesResizeBuffer(&buffer, &blen, blen + diff)) - return; - } - - memset(buffer + i - (dw - ncols), ' ', (ncols - cc) + 1); - buffer[offset] = 0; - } - - if (pair > 0) - curses.attron(COLOR_PAIR(pair)); - - curses.mvprintw(y, 0, "%s", buffer); - - if (pair > 0) - curses.attroff(COLOR_PAIR(pair)); -} - -static void _bmDrawCursesRender(const bmMenu *menu) -{ - if (!curses.stdscr) { - curses.oldStdin = dup(STDIN_FILENO); - curses.oldStdout = dup(STDOUT_FILENO); - - freopen(TTY, "w", stdout); - freopen(TTY, "r", stdin); - - setlocale(LC_CTYPE, ""); - - if ((curses.stdscr = curses.initscr()) == NULL) - return; - - *curses.ESCDELAY = 25; - curses.flushinp(); - curses.keypad(curses.stdscr, true); - curses.curs_set(1); - curses.noecho(); - curses.raw(); - - curses.start_color(); - curses.use_default_colors(); - curses.init_pair(1, COLOR_BLACK, COLOR_RED); - curses.init_pair(2, COLOR_RED, -1); - } - - const unsigned int lines = curses.getmaxy(curses.stdscr); - curses.erase(); - - unsigned int ncols = curses.getmaxx(curses.stdscr); - unsigned int titleLen = (menu->title ? strlen(menu->title) + 1 : 0); - - if (titleLen >= ncols) - titleLen = 0; - - unsigned int ccols = ncols - titleLen - 1; - unsigned int dcols = 0, doffset = menu->cursor; - - while (doffset > 0 && dcols < ccols) { - int prev = _bmUtf8RunePrev(menu->filter, doffset); - dcols += _bmUtf8RuneWidth(menu->filter + doffset - prev, prev); - doffset -= (prev ? prev : 1); - } - - _bmDrawCursesDrawLine(0, 0, "%*s%s", titleLen, "", (menu->filter ? menu->filter + doffset : "")); - - if (menu->title && titleLen > 0) { - curses.attron(COLOR_PAIR(1)); - curses.mvprintw(0, 0, menu->title); - curses.attroff(COLOR_PAIR(1)); - } - - unsigned int i, cl = 1; - unsigned int itemsCount; - bmItem **items = bmMenuGetFilteredItems(menu, &itemsCount); - for (i = (menu->index / (lines - 1)) * (lines - 1); i < itemsCount && cl < lines; ++i) { - int highlighted = (items[i] == bmMenuGetHighlightedItem(menu)); - int color = (highlighted ? 2 : (_bmMenuItemIsSelected(menu, items[i]) ? 1 : 0)); - _bmDrawCursesDrawLine(color, cl++, "%s%s", (highlighted ? ">> " : " "), (items[i]->text ? items[i]->text : "")); - } - - curses.move(0, titleLen + (menu->cursesCursor < ccols ? menu->cursesCursor : ccols)); - curses.refresh(); -} - -static unsigned int _bmDrawCursesDisplayedCount(const bmMenu *menu) -{ - (void)menu; - return (curses.stdscr ? curses.getmaxy(curses.stdscr) : 0); -} - -static void _bmDrawCursesEndWin(void) -{ - if (!curses.stdscr) - return; - - freopen(TTY, "w", stdout); - - if (curses.refresh) - curses.refresh(); - - if (curses.endwin) - curses.endwin(); - - dup2(curses.oldStdin, STDIN_FILENO); - dup2(curses.oldStdout, STDOUT_FILENO); - close(curses.oldStdin); - close(curses.oldStdout); - - curses.stdscr = NULL; -} - -static bmKey _bmDrawCursesGetKey(unsigned int *unicode) -{ - assert(unicode); - *unicode = 0; - - if (!curses.stdscr) - return BM_KEY_NONE; - - if (curses.get_wch) - curses.get_wch((wint_t*)unicode); - else if (curses.getch) - *unicode = curses.getch(); - - switch (*unicode) { -#if KEY_RESIZE - case KEY_RESIZE: - return BM_KEY_NONE; -#endif - - case 16: /* C-p */ - case KEY_UP: - return BM_KEY_UP; - - case 14: /* C-n */ - case KEY_DOWN: - return BM_KEY_DOWN; - - case 2: /* C-b */ - case KEY_LEFT: - return BM_KEY_LEFT; - - case 6: /* C-f */ - case KEY_RIGHT: - return BM_KEY_RIGHT; - - case 1: /* C-a */ - case 391: /* S-Home */ - case KEY_HOME: - return BM_KEY_HOME; - - case 5: /* C-e */ - case 386: /* S-End */ - case KEY_END: - return BM_KEY_END; - - case KEY_PPAGE: /* Page up */ - return BM_KEY_PAGE_UP; - - case KEY_NPAGE: /* Page down */ - return BM_KEY_PAGE_DOWN; - - case 550: /* C-Page up */ - case 398: /* S-Page up */ - return BM_KEY_SHIFT_PAGE_UP; - - case 545: /* C-Page down */ - case 396: /* S-Page down */ - return BM_KEY_SHIFT_PAGE_DOWN; - - case 8: /* C-h */ - case 127: /* Delete */ - case KEY_BACKSPACE: - return BM_KEY_BACKSPACE; - - case 4: /* C-d */ - case KEY_DC: - return BM_KEY_DELETE; - - case 383: /* S-Del */ - case 21: /* C-u */ - return BM_KEY_LINE_DELETE_LEFT; - - case 11: /* C-k */ - return BM_KEY_LINE_DELETE_RIGHT; - - case 23: /* C-w */ - return BM_KEY_WORD_DELETE; - - case 9: /* Tab */ - return BM_KEY_TAB; - - case 18: /* C-r */ - return BM_KEY_CONTROL_RETURN; - - case 20: /* C-t */ - case 331: /* Insert */ - _bmDrawCursesEndWin(); - return BM_KEY_SHIFT_RETURN; - - case 10: /* Return */ - _bmDrawCursesEndWin(); - return BM_KEY_RETURN; - - case 7: /* C-g */ - case 27: /* Escape */ - _bmDrawCursesEndWin(); - return BM_KEY_ESCAPE; - - default: break; - } - - return BM_KEY_UNICODE; -} - -static void _bmDrawCursesFree(void) -{ - _bmDrawCursesEndWin(); - - if (curses.handle) - dlclose(curses.handle); - - sigaction(SIGABRT, &curses.abrtAction, NULL); - sigaction(SIGSEGV, &curses.segvAction, NULL); - sigaction(SIGWINCH, &curses.winchAction, NULL); - memset(&curses, 0, sizeof(curses)); -} - -static void _bmDrawCursesCrashHandler(int sig) -{ - (void)sig; - _bmDrawCursesFree(); -} - -static void _bmDrawCursesResizeHandler(int sig) -{ - (void)sig; - if (!curses.stdscr) - return; - - curses.endwin(); - curses.refresh(); -} - -int _bmDrawCursesInit(struct _bmRenderApi *api) -{ - memset(&curses, 0, sizeof(curses)); - const char *lib = NULL, *func = NULL; - - unsigned int i; - for (i = 0; DL_PATH[i] && !curses.handle; ++i) - curses.handle = dlopen((lib = DL_PATH[i]), RTLD_LAZY); - - if (!curses.handle) - return 0; - -#define bmLoadFunction(x) (curses.x = dlsym(curses.handle, (func = #x))) - - if (!bmLoadFunction(initscr)) - goto function_pointer_exception; - if (!bmLoadFunction(endwin)) - goto function_pointer_exception; - if (!bmLoadFunction(refresh)) - goto function_pointer_exception; - if (!bmLoadFunction(get_wch) && !bmLoadFunction(getch)) - goto function_pointer_exception; - if (!bmLoadFunction(erase)) - goto function_pointer_exception; - if (!bmLoadFunction(mvprintw)) - goto function_pointer_exception; - if (!bmLoadFunction(move)) - goto function_pointer_exception; - if (!bmLoadFunction(init_pair)) - goto function_pointer_exception; - if (!bmLoadFunction(attroff)) - goto function_pointer_exception; - if (!bmLoadFunction(attron)) - goto function_pointer_exception; - if (!bmLoadFunction(start_color)) - goto function_pointer_exception; - if (!bmLoadFunction(use_default_colors)) - goto function_pointer_exception; - if (!bmLoadFunction(keypad)) - goto function_pointer_exception; - if (!bmLoadFunction(curs_set)) - goto function_pointer_exception; - if (!bmLoadFunction(flushinp)) - goto function_pointer_exception; - if (!bmLoadFunction(noecho)) - goto function_pointer_exception; - if (!bmLoadFunction(raw)) - goto function_pointer_exception; - if (!bmLoadFunction(ESCDELAY)) - goto function_pointer_exception; - -#ifndef NCURSES_OPAQUE - curses.getmaxx = wrap_getmaxx; - curses.getmaxy = wrap_getmaxy; -#else - if (!bmLoadFunction(getmaxx)) - goto function_pointer_exception; - if (!bmLoadFunction(getmaxy)) - goto function_pointer_exception; -#endif - -#undef bmLoadFunction - - api->displayedCount = _bmDrawCursesDisplayedCount; - api->getKey = _bmDrawCursesGetKey; - api->render = _bmDrawCursesRender; - api->free = _bmDrawCursesFree; - - struct sigaction action; - memset(&action, 0, sizeof(struct sigaction)); - action.sa_handler = _bmDrawCursesCrashHandler; - sigaction(SIGABRT, &action, &curses.abrtAction); - sigaction(SIGSEGV, &action, &curses.segvAction); - - action.sa_handler = _bmDrawCursesResizeHandler; - sigaction(SIGWINCH, &action, &curses.winchAction); - return 1; - -function_pointer_exception: - fprintf(stderr, "-!- Could not load function '%s' from '%s'\n", func, lib); - _bmDrawCursesFree(); - return 0; -} - -/* vim: set ts=8 sw=4 tw=0 :*/ |