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Diffstat (limited to 'sys/cmd/dvtm/vt.c.old')
| -rw-r--r-- | sys/cmd/dvtm/vt.c.old | 2074 |
1 files changed, 0 insertions, 2074 deletions
diff --git a/sys/cmd/dvtm/vt.c.old b/sys/cmd/dvtm/vt.c.old deleted file mode 100644 index d858472..0000000 --- a/sys/cmd/dvtm/vt.c.old +++ /dev/null @@ -1,2074 +0,0 @@ -/* See license for details */ -#include <u.h> -#include <libn.h> - -#include <langinfo.h> -#include <signal.h> -#include <termios.h> - -#include <sys/ioctl.h> -#include <sys/types.h> - -#if defined(__linux__) || defined(__CYGWIN__) -# include <pty.h> -#elif defined(__FreeBSD__) || defined(__DragonFly__) -# include <libutil.h> -#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__) -# include <util.h> -#endif - -#include "vt.h" - -#ifndef NCURSES_ATTR_SHIFT -# define NCURSES_ATTR_SHIFT 8 -#endif - -#ifndef NCURSES_ACS -# ifdef PDCURSES -# define NCURSES_ACS(c) (acs_map[(uchar)(c)]) -# else /* BSD curses */ -# define NCURSES_ACS(c) (_acs_map[(uchar)(c)]) -# endif -#endif - -#ifdef NCURSES_VERSION - -#ifndef NCURSES_EXT_COLORS -# define NCURSES_EXT_COLORS 0 -#endif - -#if !NCURSES_EXT_COLORS -# define MAX_COLOR_PAIRS MIN(COLOR_PAIRS, 256) -#endif - -#endif - -#ifndef MAX_COLOR_PAIRS -# define MAX_COLOR_PAIRS COLOR_PAIRS -#endif - -#if defined _AIX && defined CTRL -# undef CTRL -#endif -#ifndef CTRL -# define CTRL(k) ((k) & 0x1F) -#endif - -#define IS_CONTROL(ch) !((ch) & 0xffffff60UL) - -static bool is_utf8, has_default_colors; -static int color_pairs_reserved, color_pairs_max, color_pair_current; -static int *color2palette, default_fg, default_bg; -static char vt_term[32]; - -typedef struct { - wchar_t text; - attr_t attr; - int fg; - int bg; -} Cell; - -typedef struct { - Cell *cells; - uint dirty:1; -} Row; - -/* Buffer holding the current terminal window content (as an array) as well - * as the scroll back buffer content (as a circular/ring buffer). - * - * If new content is added to terminal the view port slides down and the - * previously top most line is moved into the scroll back buffer at postion - * scroll_index. This index will eventually wrap around and thus overwrite - * the oldest lines. - * - * In the scenerio below a scroll up has been performed. That is 'scroll_above' - * lines still lie above the current view port. Further scrolling up will show - * them. Similarly 'scroll_below' is the amount of lines below the current - * viewport. - * - * The function buffer_boundary sets the row pointers to the start/end range - * of the section delimiting the region before/after the viewport. The functions - * buffer_row_{first,last} return the first/last logical row. And - * buffer_row_{next,prev} allows to iterate over the logical lines in either - * direction. - * - * scroll back buffer - * - * scroll_buf->+----------------+-----+ - * | | | ^ \ - * | before | | | | - * current terminal content | viewport | | | | - * | | | | - * +----------------+-----+\ | | | s > scroll_above - * ^ | | i | \ | | i | c | - * | | | n | \ | | n | r | - * | | v | \ | | v | o | - * r | | i | \ | | i | l / - * o | viewport | s | >|<- scroll_index | s | l \ - * w | | i | / | | i | | - * s | | b | / | after | b | s > scroll_below - * | | l | / | viewport | l | i | - * v | | e | / | | e | z / - * +----------------+-----+/ | unused | | e - * <- maxcols -> | scroll back | | - * <- cols -> | buffer | | | - * | | | | - * | | | v - * roll_buf + scroll_size->+----------------+-----+ - * <- maxcols -> - * <- cols -> - */ -typedef struct { - Row *lines; /* array of Row pointers of size 'rows' */ - Row *curs_row; /* row on which the cursor currently resides */ - Row *scroll_buf; /* a ring buffer holding the scroll back content */ - Row *scroll_top; /* row in lines where scrolling region starts */ - Row *scroll_bot; /* row in lines where scrolling region ends */ - bool *tabs; /* a boolean flag for each column whether it is a tab */ - int scroll_size; /* maximal capacity of scroll back buffer (in lines) */ - int scroll_index; /* current index into the ring buffer */ - int scroll_above; /* number of lines above current viewport */ - int scroll_below; /* number of lines below current viewport */ - int rows, cols; /* current dimension of buffer */ - int maxcols; /* allocated cells (maximal cols over time) */ - attr_t curattrs, savattrs; /* current and saved attributes for cells */ - int curs_col; /* current cursor column (zero based) */ - int curs_srow, curs_scol; /* saved cursor row/colmn (zero based) */ - short curfg, curbg; /* current fore and background colors */ - short savfg, savbg; /* saved colors */ -} Buffer; - -struct Vt { - Buffer buffer_normal; /* normal screen buffer */ - Buffer buffer_alternate; /* alternate screen buffer */ - Buffer *buffer; /* currently active buffer (one of the above) */ - attr_t defattrs; /* attributes to use for normal/empty cells */ - int deffg, defbg; /* colors to use for back normal/empty cells (white/black) */ - int pty; /* master side pty file descriptor */ - pid_t pid; /* process id of the process running in this vt */ - /* flags */ - uint seen_input:1; - uint insert:1; - uint escaped:1; - uint curshid:1; - uint curskeymode:1; - uint bell:1; - uint relposmode:1; - uint mousetrack:1; - uint graphmode:1; - uint savgraphmode:1; - bool charsets[2]; - /* buffers and parsing state */ - char rbuf[BUFSIZ]; - char ebuf[BUFSIZ]; - uint rlen, elen; - int srow, scol; /* last known offset to display start row, start column */ - char title[256]; /* xterm style window title */ - vt_title_handler_t title_handler; /* hook which is called when title changes */ - vt_urgent_handler_t urgent_handler; /* hook which is called upon bell */ - void *data; /* user supplied data */ -}; - -#if 0 -static const char *keytable[KEY_MAX+1] = { - [KEY_ENTER] = "\r", - ['\n'] = "\n", - /* for the arrow keys the CSI / SS3 sequences are not stored here - * because they depend on the current cursor terminal mode - */ - [KEY_UP] = "A", - [KEY_DOWN] = "B", - [KEY_RIGHT] = "C", - [KEY_LEFT] = "D", -#ifdef KEY_SUP - [KEY_SUP] = "\e[1;2A", -#endif -#ifdef KEY_SDOWN - [KEY_SDOWN] = "\e[1;2B", -#endif - [KEY_SRIGHT] = "\e[1;2C", - [KEY_SLEFT] = "\e[1;2D", - [KEY_BACKSPACE] = "\177", - [KEY_IC] = "\e[2~", - [KEY_DC] = "\e[3~", - [KEY_PPAGE] = "\e[5~", - [KEY_NPAGE] = "\e[6~", - [KEY_HOME] = "\e[7~", - [KEY_END] = "\e[8~", - [KEY_BTAB] = "\e[Z", - [KEY_SUSPEND] = "\x1A", /* Ctrl+Z gets mapped to this */ - [KEY_F(1)] = "\e[11~", - [KEY_F(2)] = "\e[12~", - [KEY_F(3)] = "\e[13~", - [KEY_F(4)] = "\e[14~", - [KEY_F(5)] = "\e[15~", - [KEY_F(6)] = "\e[17~", - [KEY_F(7)] = "\e[18~", - [KEY_F(8)] = "\e[19~", - [KEY_F(9)] = "\e[20~", - [KEY_F(10)] = "\e[21~", - [KEY_F(11)] = "\e[23~", - [KEY_F(12)] = "\e[24~", - [KEY_F(13)] = "\e[23~", - [KEY_F(14)] = "\e[24~", - [KEY_F(15)] = "\e[25~", - [KEY_F(16)] = "\e[26~", - [KEY_F(17)] = "\e[28~", - [KEY_F(18)] = "\e[29~", - [KEY_F(19)] = "\e[31~", - [KEY_F(20)] = "\e[32~", - [KEY_F(21)] = "\e[33~", - [KEY_F(22)] = "\e[34~", - [KEY_RESIZE] = "", -#ifdef KEY_EVENT - [KEY_EVENT] = "", -#endif -}; -#endif - -static void puttab(Vt *t, int count); -static void process_nonprinting(Vt *t, wchar_t wc); -static void send_curs(Vt *t); - -const static -attr_t -build_attrs(attr_t curattrs) -{ - return ((curattrs & ~A_COLOR) | COLOR_PAIR(curattrs & 0xff)) >> NCURSES_ATTR_SHIFT; -} - -static -void -row_set(Row *row, int start, int len, Buffer *t) -{ - Cell cell = { - .text = L'\0', - .attr = t ? build_attrs(t->curattrs) : 0, - .fg = t ? t->curfg : -1, - .bg = t ? t->curbg : -1, - }; - - for (int i = start; i < len + start; i++) - row->cells[i] = cell; - row->dirty = true; -} - -static -void -row_roll(Row *start, Row *end, int count) -{ - int n = end - start; - - count %= n; - if (count < 0) - count += n; - - if (count) { - char buf[count * sizeof(Row)]; - memcpy(buf, start, count * sizeof(Row)); - memmove(start, start + count, (n - count) * sizeof(Row)); - memcpy(end - count, buf, count * sizeof(Row)); - for (Row *row = start; row < end; row++) - row->dirty = true; - } -} - -static -void -buffer_clear(Buffer *b) -{ - Cell cell = { - .text = L'\0', - .attr = A_NORMAL, - .fg = -1, - .bg = -1, - }; - - for (int i = 0; i < b->rows; i++) { - Row *row = b->lines + i; - for (int j = 0; j < b->cols; j++) { - row->cells[j] = cell; - row->dirty = true; - } - } -} - -static -void -buffer_free(Buffer *b) -{ - for (int i = 0; i < b->rows; i++) - free(b->lines[i].cells); - free(b->lines); - for (int i = 0; i < b->scroll_size; i++) - free(b->scroll_buf[i].cells); - free(b->scroll_buf); - free(b->tabs); -} - -static -void -buffer_scroll(Buffer *b, int s) -{ - /* work in screenfuls */ - int ssz = b->scroll_bot - b->scroll_top; - if (s > ssz) { - buffer_scroll(b, ssz); - buffer_scroll(b, s - ssz); - return; - } - if (s < -ssz) { - buffer_scroll(b, -ssz); - buffer_scroll(b, s + ssz); - return; - } - - b->scroll_above += s; - if (b->scroll_above >= b->scroll_size) - b->scroll_above = b->scroll_size; - - if (s > 0 && b->scroll_size) { - for (int i = 0; i < s; i++) { - Row tmp = b->scroll_top[i]; - b->scroll_top[i] = b->scroll_buf[b->scroll_index]; - b->scroll_buf[b->scroll_index] = tmp; - - b->scroll_index++; - if (b->scroll_index == b->scroll_size) - b->scroll_index = 0; - } - } - row_roll(b->scroll_top, b->scroll_bot, s); - if (s < 0 && b->scroll_size) { - for (int i = (-s) - 1; i >= 0; i--) { - b->scroll_index--; - if (b->scroll_index == -1) - b->scroll_index = b->scroll_size - 1; - - Row tmp = b->scroll_top[i]; - b->scroll_top[i] = b->scroll_buf[b->scroll_index]; - b->scroll_buf[b->scroll_index] = tmp; - b->scroll_top[i].dirty = true; - } - } -} - -static -void -buffer_resize(Buffer *b, int rows, int cols) -{ - Row *lines = b->lines; - - if (b->rows != rows) { - if (b->curs_row >= lines + rows) { - /* scroll up instead of simply chopping off bottom */ - buffer_scroll(b, (b->curs_row - b->lines) - rows + 1); - } - while (b->rows > rows) { - free(lines[b->rows - 1].cells); - b->rows--; - } - - lines = realloc(lines, sizeof(Row) * rows); - } - - if (b->maxcols < cols) { - for (int row = 0; row < b->rows; row++) { - lines[row].cells = realloc(lines[row].cells, sizeof(Cell) * cols); - if (b->cols < cols) - row_set(lines + row, b->cols, cols - b->cols, nil); - lines[row].dirty = true; - } - Row *sbuf = b->scroll_buf; - for (int row = 0; row < b->scroll_size; row++) { - sbuf[row].cells = realloc(sbuf[row].cells, sizeof(Cell) * cols); - if (b->cols < cols) - row_set(sbuf + row, b->cols, cols - b->cols, nil); - } - b->tabs = realloc(b->tabs, sizeof(*b->tabs) * cols); - for (int col = b->cols; col < cols; col++) - b->tabs[col] = !(col & 7); - b->maxcols = cols; - b->cols = cols; - } else if (b->cols != cols) { - for (int row = 0; row < b->rows; row++) - lines[row].dirty = true; - b->cols = cols; - } - - int deltarows = 0; - if (b->rows < rows) { - while (b->rows < rows) { - lines[b->rows].cells = calloc(b->maxcols, sizeof(Cell)); - row_set(lines + b->rows, 0, b->maxcols, b); - b->rows++; - } - - /* prepare for backfill */ - if (b->curs_row >= b->scroll_bot - 1) { - deltarows = b->lines + rows - b->curs_row - 1; - if (deltarows > b->scroll_above) - deltarows = b->scroll_above; - } - } - - b->curs_row += lines - b->lines; - b->scroll_top = lines; - b->scroll_bot = lines + rows; - b->lines = lines; - - /* perform backfill */ - if (deltarows > 0) { - buffer_scroll(b, -deltarows); - b->curs_row += deltarows; - } -} - -static -bool -buffer_init(Buffer *b, int rows, int cols, int scroll_size) -{ - b->curattrs = A_NORMAL; /* white text over black background */ - b->curfg = b->curbg = -1; - if (scroll_size < 0) - scroll_size = 0; - if (scroll_size && !(b->scroll_buf = calloc(scroll_size, sizeof(Row)))) - return false; - b->scroll_size = scroll_size; - buffer_resize(b, rows, cols); - return true; -} - -static -void -buffer_boundry(Buffer *b, Row **bs, Row **be, Row **as, Row **ae) -{ - if (bs) - *bs = nil; - if (be) - *be = nil; - if (as) - *as = nil; - if (ae) - *ae = nil; - if (!b->scroll_size) - return; - - if (b->scroll_above) { - if (bs) - *bs = &b->scroll_buf[(b->scroll_index - b->scroll_above + b->scroll_size) % b->scroll_size]; - if (be) - *be = &b->scroll_buf[(b->scroll_index-1 + b->scroll_size) % b->scroll_size]; - } - if (b->scroll_below) { - if (as) - *as = &b->scroll_buf[b->scroll_index]; - if (ae) - *ae = &b->scroll_buf[(b->scroll_index + b->scroll_below-1) % b->scroll_size]; - } -} - -static -Row * -buffer_row_first(Buffer *b) { - Row *bstart; - if (!b->scroll_size || !b->scroll_above) - return b->lines; - buffer_boundry(b, &bstart, nil, nil, nil); - return bstart; -} - -static -Row * -buffer_row_last(Buffer *b) { - Row *aend; - if (!b->scroll_size || !b->scroll_below) - return b->lines + b->rows - 1; - buffer_boundry(b, nil, nil, nil, &aend); - return aend; -} - -static -Row * -buffer_row_next(Buffer *b, Row *row) -{ - Row *before_start, *before_end, *after_start, *after_end; - Row *first = b->lines, *last = b->lines + b->rows - 1; - - if (!row) - return nil; - - buffer_boundry(b, &before_start, &before_end, &after_start, &after_end); - - if (row >= first && row < last) - return ++row; - if (row == last) - return after_start; - if (row == before_end) - return first; - if (row == after_end) - return nil; - if (row == &b->scroll_buf[b->scroll_size - 1]) - return b->scroll_buf; - return ++row; -} - -static -Row * -buffer_row_prev(Buffer *b, Row *row) -{ - Row *before_start, *before_end, *after_start, *after_end; - Row *first = b->lines, *last = b->lines + b->rows - 1; - - if (!row) - return nil; - - buffer_boundry(b, &before_start, &before_end, &after_start, &after_end); - - if (row > first && row <= last) - return --row; - if (row == first) - return before_end; - if (row == before_start) - return nil; - if (row == after_start) - return last; - if (row == b->scroll_buf) - return &b->scroll_buf[b->scroll_size - 1]; - return --row; -} - -static -void -cursor_clamp(Vt *t) -{ - Buffer *b = t->buffer; - Row *lines = t->relposmode ? b->scroll_top : b->lines; - int rows = t->relposmode ? b->scroll_bot - b->scroll_top : b->rows; - - if (b->curs_row < lines) - b->curs_row = lines; - if (b->curs_row >= lines + rows) - b->curs_row = lines + rows - 1; - if (b->curs_col < 0) - b->curs_col = 0; - if (b->curs_col >= b->cols) - b->curs_col = b->cols - 1; -} - -static -void -cursor_line_down(Vt *t) -{ - Buffer *b = t->buffer; - row_set(b->curs_row, b->cols, b->maxcols - b->cols, nil); - b->curs_row++; - if (b->curs_row < b->scroll_bot) - return; - - vt_noscroll(t); - - b->curs_row = b->scroll_bot - 1; - buffer_scroll(b, 1); - row_set(b->curs_row, 0, b->cols, b); -} - -static -void -cursor_save(Vt *t) -{ - Buffer *b = t->buffer; - b->curs_srow = b->curs_row - b->lines; - b->curs_scol = b->curs_col; -} - -static -void -cursor_restore(Vt *t) -{ - Buffer *b = t->buffer; - b->curs_row = b->lines + b->curs_srow; - b->curs_col = b->curs_scol; - cursor_clamp(t); -} - -static -void -attributes_save(Vt *t) -{ - Buffer *b = t->buffer; - b->savattrs = b->curattrs; - b->savfg = b->curfg; - b->savbg = b->curbg; - t->savgraphmode = t->graphmode; -} - -static -void -attributes_restore(Vt *t) -{ - Buffer *b = t->buffer; - b->curattrs = b->savattrs; - b->curfg = b->savfg; - b->curbg = b->savbg; - t->graphmode = t->savgraphmode; -} - -static -void -new_escape_sequence(Vt *t) -{ - t->escaped = true; - t->elen = 0; - t->ebuf[0] = '\0'; -} - -static -void -cancel_escape_sequence(Vt *t) -{ - t->escaped = false; - t->elen = 0; - t->ebuf[0] = '\0'; -} - -static -bool -is_valid_csi_ender(int c) -{ - return (c >= 'a' && c <= 'z') - || (c >= 'A' && c <= 'Z') - || (c == '@' || c == '`'); -} - -/* interprets a 'set attribute' (SGR) CSI escape sequence */ -static -void -interpret_csi_sgr(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - if (pcount == 0) { - /* special case: reset attributes */ - b->curattrs = A_NORMAL; - b->curfg = b->curbg = -1; - return; - } - - for (int i = 0; i < pcount; i++) { - switch (param[i]) { - case 0: - b->curattrs = A_NORMAL; - b->curfg = b->curbg = -1; - break; - case 1: - b->curattrs |= A_BOLD; - break; - case 2: - b->curattrs |= A_DIM; - break; -#ifdef A_ITALIC - case 3: - b->curattrs |= A_ITALIC; - break; -#endif - case 4: - b->curattrs |= A_UNDERLINE; - break; - case 5: - b->curattrs |= A_BLINK; - break; - case 7: - b->curattrs |= A_REVERSE; - break; - case 8: - b->curattrs |= A_INVIS; - break; - case 22: - b->curattrs &= ~(A_BOLD | A_DIM); - break; -#ifdef A_ITALIC - case 23: - b->curattrs &= ~A_ITALIC; - break; -#endif - case 24: - b->curattrs &= ~A_UNDERLINE; - break; - case 25: - b->curattrs &= ~A_BLINK; - break; - case 27: - b->curattrs &= ~A_REVERSE; - break; - case 28: - b->curattrs &= ~A_INVIS; - break; - case 30 ... 37: /* fg */ - b->curfg = param[i] - 30; - break; - case 38: - if ((i + 2) < pcount && param[i + 1] == 5) { - b->curfg = param[i + 2]; - i += 2; - } - break; - case 39: - b->curfg = -1; - break; - case 40 ... 47: /* bg */ - b->curbg = param[i] - 40; - break; - case 48: - if ((i + 2) < pcount && param[i + 1] == 5) { - b->curbg = param[i + 2]; - i += 2; - } - break; - case 49: - b->curbg = -1; - break; - case 90 ... 97: /* hi fg */ - b->curfg = param[i] - 82; - break; - case 100 ... 107: /* hi bg */ - b->curbg = param[i] - 92; - break; - default: - break; - } - } -} - -/* interprets an 'erase display' (ED) escape sequence */ -static -void -interpret_csi_ed(Vt *t, int param[], int pcount) -{ - Row *row, *start, *end; - Buffer *b = t->buffer; - - attributes_save(t); - b->curattrs = A_NORMAL; - b->curfg = b->curbg = -1; - - if (pcount && param[0] == 2) { - start = b->lines; - end = b->lines + b->rows; - } else if (pcount && param[0] == 1) { - start = b->lines; - end = b->curs_row; - row_set(b->curs_row, 0, b->curs_col + 1, b); - } else { - row_set(b->curs_row, b->curs_col, b->cols - b->curs_col, b); - start = b->curs_row + 1; - end = b->lines + b->rows; - } - - for (row = start; row < end; row++) - row_set(row, 0, b->cols, b); - - attributes_restore(t); -} - -/* interprets a 'move cursor' (CUP) escape sequence */ -static -void -interpret_csi_cup(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - Row *lines = t->relposmode ? b->scroll_top : b->lines; - - if (pcount == 0) { - b->curs_row = lines; - b->curs_col = 0; - } else if (pcount == 1) { - b->curs_row = lines + param[0] - 1; - b->curs_col = 0; - } else { - b->curs_row = lines + param[0] - 1; - b->curs_col = param[1] - 1; - } - - cursor_clamp(t); -} - -/* Interpret the 'relative mode' sequences: CUU, CUD, CUF, CUB, CNL, - * CPL, CHA, HPR, VPA, VPR, HPA */ -static -void -interpret_csi_c(Vt *t, char verb, int param[], int pcount) -{ - Buffer *b = t->buffer; - int n = (pcount && param[0] > 0) ? param[0] : 1; - - switch (verb) { - case 'A': - b->curs_row -= n; - break; - case 'B': - case 'e': - b->curs_row += n; - break; - case 'C': - case 'a': - b->curs_col += n; - break; - case 'D': - b->curs_col -= n; - break; - case 'E': - b->curs_row += n; - b->curs_col = 0; - break; - case 'F': - b->curs_row -= n; - b->curs_col = 0; - break; - case 'G': - case '`': - b->curs_col = n - 1; - break; - case 'd': - b->curs_row = b->lines + n - 1; - break; - } - - cursor_clamp(t); -} - -/* Interpret the 'erase line' escape sequence */ -static -void -interpret_csi_el(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - switch (pcount ? param[0] : 0) { - case 1: - row_set(b->curs_row, 0, b->curs_col + 1, b); - break; - case 2: - row_set(b->curs_row, 0, b->cols, b); - break; - default: - row_set(b->curs_row, b->curs_col, b->cols - b->curs_col, b); - break; - } -} - -/* Interpret the 'insert blanks' sequence (ICH) */ -static -void -interpret_csi_ich(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - Row *row = b->curs_row; - int n = (pcount && param[0] > 0) ? param[0] : 1; - - if (b->curs_col + n > b->cols) - n = b->cols - b->curs_col; - - for (int i = b->cols - 1; i >= b->curs_col + n; i--) - row->cells[i] = row->cells[i - n]; - - row_set(row, b->curs_col, n, b); -} - -/* Interpret the 'delete chars' sequence (DCH) */ -static -void -interpret_csi_dch(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - Row *row = b->curs_row; - int n = (pcount && param[0] > 0) ? param[0] : 1; - - if (b->curs_col + n > b->cols) - n = b->cols - b->curs_col; - - for (int i = b->curs_col; i < b->cols - n; i++) - row->cells[i] = row->cells[i + n]; - - row_set(row, b->cols - n, n, b); -} - -/* Interpret an 'insert line' sequence (IL) */ -static -void -interpret_csi_il(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - int n = (pcount && param[0] > 0) ? param[0] : 1; - - if (b->curs_row + n >= b->scroll_bot) { - for (Row *row = b->curs_row; row < b->scroll_bot; row++) - row_set(row, 0, b->cols, b); - } else { - row_roll(b->curs_row, b->scroll_bot, -n); - for (Row *row = b->curs_row; row < b->curs_row + n; row++) - row_set(row, 0, b->cols, b); - } -} - -/* Interpret a 'delete line' sequence (DL) */ -static -void -interpret_csi_dl(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - int n = (pcount && param[0] > 0) ? param[0] : 1; - - if (b->curs_row + n >= b->scroll_bot) { - for (Row *row = b->curs_row; row < b->scroll_bot; row++) - row_set(row, 0, b->cols, b); - } else { - row_roll(b->curs_row, b->scroll_bot, n); - for (Row *row = b->scroll_bot - n; row < b->scroll_bot; row++) - row_set(row, 0, b->cols, b); - } -} - -/* Interpret an 'erase characters' (ECH) sequence */ -static -void -interpret_csi_ech(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - int n = (pcount && param[0] > 0) ? param[0] : 1; - - if (b->curs_col + n > b->cols) - n = b->cols - b->curs_col; - - row_set(b->curs_row, b->curs_col, n, b); -} - -/* Interpret a 'set scrolling region' (DECSTBM) sequence */ -static -void -interpret_csi_decstbm(Vt *t, int param[], int pcount) -{ - Buffer *b = t->buffer; - int new_top, new_bot; - - switch (pcount) { - case 0: - b->scroll_top = b->lines; - b->scroll_bot = b->lines + b->rows; - break; - case 2: - new_top = param[0] - 1; - new_bot = param[1]; - - /* clamp to bounds */ - if (new_top < 0) - new_top = 0; - if (new_top >= b->rows) - new_top = b->rows - 1; - if (new_bot < 0) - new_bot = 0; - if (new_bot >= b->rows) - new_bot = b->rows; - - /* check for range validity */ - if (new_top < new_bot) { - b->scroll_top = b->lines + new_top; - b->scroll_bot = b->lines + new_bot; - } - break; - default: - return; /* malformed */ - } - b->curs_row = b->scroll_top; - b->curs_col = 0; -} - -static -void -interpret_csi_mode(Vt *t, int param[], int pcount, bool set) -{ - for (int i = 0; i < pcount; i++) { - switch (param[i]) { - case 4: /* insert/replace mode */ - t->insert = set; - break; - } - } -} - -static -void -interpret_csi_priv_mode(Vt *t, int param[], int pcount, bool set) -{ - for (int i = 0; i < pcount; i++) { - switch (param[i]) { - case 1: /* set application/normal cursor key mode (DECCKM) */ - t->curskeymode = set; - break; - case 6: /* set origin to relative/absolute (DECOM) */ - t->relposmode = set; - break; - case 25: /* make cursor visible/invisible (DECCM) */ - t->curshid = !set; - break; - case 1049: /* combine 1047 + 1048 */ - case 47: /* use alternate/normal screen buffer */ - case 1047: - if (!set) - buffer_clear(&t->buffer_alternate); - t->buffer = set ? &t->buffer_alternate : &t->buffer_normal; - vt_dirty(t); - if (param[i] != 1049) - break; - /* fall through */ - case 1048: /* save/restore cursor */ - if (set) - cursor_save(t); - else - cursor_restore(t); - break; - case 1000: /* enable/disable normal mouse tracking */ - t->mousetrack = set; - break; - } - } -} - -static -void -interpret_csi(Vt *t) -{ - Buffer *b = t->buffer; - int csiparam[16]; - uint param_count = 0; - const char *p = t->ebuf + 1; - char verb = t->ebuf[t->elen - 1]; - - /* parse numeric parameters */ - for (p += (t->ebuf[1] == '?'); *p; p++) { - if (IS_CONTROL(*p)) { - process_nonprinting(t, *p); - } else if (*p == ';') { - if (param_count >= arrlen(csiparam)) - return; /* too long! */ - csiparam[param_count++] = 0; - } else if (isdigit((uchar)*p)) { - if (param_count == 0) - csiparam[param_count++] = 0; - csiparam[param_count - 1] *= 10; - csiparam[param_count - 1] += *p - '0'; - } - } - - if (t->ebuf[1] == '?') { - switch (verb) { - case 'h': - case 'l': /* private set/reset mode */ - interpret_csi_priv_mode(t, csiparam, param_count, verb == 'h'); - break; - } - return; - } - - /* delegate handling depending on command character (verb) */ - switch (verb) { - case 'h': - case 'l': /* set/reset mode */ - interpret_csi_mode(t, csiparam, param_count, verb == 'h'); - break; - case 'm': /* set attribute */ - interpret_csi_sgr(t, csiparam, param_count); - break; - case 'J': /* erase display */ - interpret_csi_ed(t, csiparam, param_count); - break; - case 'H': - case 'f': /* move cursor */ - interpret_csi_cup(t, csiparam, param_count); - break; - case 'A': - case 'B': - case 'C': - case 'D': - case 'E': - case 'F': - case 'G': - case 'e': - case 'a': - case 'd': - case '`': /* relative move */ - interpret_csi_c(t, verb, csiparam, param_count); - break; - case 'K': /* erase line */ - interpret_csi_el(t, csiparam, param_count); - break; - case '@': /* insert characters */ - interpret_csi_ich(t, csiparam, param_count); - break; - case 'P': /* delete characters */ - interpret_csi_dch(t, csiparam, param_count); - break; - case 'L': /* insert lines */ - interpret_csi_il(t, csiparam, param_count); - break; - case 'M': /* delete lines */ - interpret_csi_dl(t, csiparam, param_count); - break; - case 'X': /* erase chars */ - interpret_csi_ech(t, csiparam, param_count); - break; - case 'S': /* SU: scroll up */ - vt_scroll(t, param_count ? -csiparam[0] : -1); - break; - case 'T': /* SD: scroll down */ - vt_scroll(t, param_count ? csiparam[0] : 1); - break; - case 'Z': /* CBT: cursor backward tabulation */ - puttab(t, param_count ? -csiparam[0] : -1); - break; - case 'g': /* TBC: tabulation clear */ - switch (param_count ? csiparam[0] : 0) { - case 0: - b->tabs[b->curs_col] = false; - break; - case 3: - memset(b->tabs, 0, sizeof(*b->tabs) * b->maxcols); - break; - } - break; - case 'r': /* set scrolling region */ - interpret_csi_decstbm(t, csiparam, param_count); - break; - case 's': /* save cursor location */ - cursor_save(t); - break; - case 'u': /* restore cursor location */ - cursor_restore(t); - break; - case 'n': /* query cursor location */ - if (param_count == 1 && csiparam[0] == 6) - send_curs(t); - break; - default: - break; - } -} - -/* Interpret an 'index' (IND) sequence */ -static -void -interpret_csi_ind(Vt *t) -{ - Buffer *b = t->buffer; - if (b->curs_row < b->lines + b->rows - 1) - b->curs_row++; -} - -/* Interpret a 'reverse index' (RI) sequence */ -static -void -interpret_csi_ri(Vt *t) -{ - Buffer *b = t->buffer; - if (b->curs_row > b->scroll_top) - b->curs_row--; - else { - row_roll(b->scroll_top, b->scroll_bot, -1); - row_set(b->scroll_top, 0, b->cols, b); - } -} - -/* Interpret a 'next line' (NEL) sequence */ -static -void -interpret_csi_nel(Vt *t) -{ - Buffer *b = t->buffer; - if (b->curs_row < b->lines + b->rows - 1) { - b->curs_row++; - b->curs_col = 0; - } -} - -/* Interpret a 'select character set' (SCS) sequence */ -static -void -interpret_csi_scs(Vt *t) -{ - /* ESC ( sets G0, ESC ) sets G1 */ - t->charsets[!!(t->ebuf[0] == ')')] = (t->ebuf[1] == '0'); - t->graphmode = t->charsets[0]; -} - -/* Interpret an 'operating system command' (OSC) sequence */ -static -void -interpret_osc(Vt *t) -{ - /* ESC ] command ; data BEL - * ESC ] command ; data ESC \\ - * Note that BEL or ESC \\ have already been replaced with NUL. - */ - char *data = nil; - int command = strtoul(t->ebuf + 1, &data, 10); - if (data && *data == ';') { - switch (command) { - case 0: /* icon name and window title */ - case 2: /* window title */ - if (t->title_handler) - t->title_handler(t, data+1); - break; - case 1: /* icon name */ - break; - default: -#ifndef NDEBUG - fprintf(stderr, "unknown OSC command: %d\n", command); -#endif - break; - } - } -} - -static -void -try_interpret_escape_seq(Vt *t) -{ - char lastchar = t->ebuf[t->elen - 1]; - - if (!*t->ebuf) - return; - - switch (*t->ebuf) { - case '#': /* ignore DECDHL, DECSWL, DECDWL, DECHCP, DECFPP */ - if (t->elen == 2) { - if (lastchar == '8') { /* DECALN */ - interpret_csi_ed(t, (int []){ 2 }, 1); - goto handled; - } - goto cancel; - } - break; - case '(': - case ')': - if (t->elen == 2) { - interpret_csi_scs(t); - goto handled; - } - break; - case ']': /* OSC - operating system command */ - if (lastchar == '\a' || - (lastchar == '\\' && t->elen >= 2 && t->ebuf[t->elen - 2] == '\e')) { - t->elen -= lastchar == '\a' ? 1 : 2; - t->ebuf[t->elen] = '\0'; - interpret_osc(t); - goto handled; - } - break; - case '[': /* CSI - control sequence introducer */ - if (is_valid_csi_ender(lastchar)) { - interpret_csi(t); - goto handled; - } - break; - case '7': /* DECSC: save cursor and attributes */ - attributes_save(t); - cursor_save(t); - goto handled; - case '8': /* DECRC: restore cursor and attributes */ - attributes_restore(t); - cursor_restore(t); - goto handled; - case 'D': /* IND: index */ - interpret_csi_ind(t); - goto handled; - case 'M': /* RI: reverse index */ - interpret_csi_ri(t); - goto handled; - case 'E': /* NEL: next line */ - interpret_csi_nel(t); - goto handled; - case 'H': /* HTS: horizontal tab set */ - t->buffer->tabs[t->buffer->curs_col] = true; - goto handled; - default: - goto cancel; - } - - if (t->elen + 1 >= sizeof(t->ebuf)) { -cancel: -#ifndef NDEBUG - fprintf(stderr, "cancelled: \\033"); - for (uint i = 0; i < t->elen; i++) { - if (isprint(t->ebuf[i])) { - fputc(t->ebuf[i], stderr); - } else { - fprintf(stderr, "\\%03o", t->ebuf[i]); - } - } - fputc('\n', stderr); -#endif -handled: - cancel_escape_sequence(t); - } -} - -static -void -puttab(Vt *t, int count) -{ - Buffer *b = t->buffer; - int direction = count >= 0 ? 1 : -1; - for (int col = b->curs_col + direction; count; col += direction) { - if (col < 0) { - b->curs_col = 0; - break; - } - if (col >= b->cols) { - b->curs_col = b->cols - 1; - break; - } - if (b->tabs[col]) { - b->curs_col = col; - count -= direction; - } - } -} - -static -void -process_nonprinting(Vt *t, wchar_t wc) -{ - Buffer *b = t->buffer; - switch (wc) { - case '\e': /* ESC */ - new_escape_sequence(t); - break; - case '\a': /* BEL */ - if (t->urgent_handler) - t->urgent_handler(t); - break; - case '\b': /* BS */ - if (b->curs_col > 0) - b->curs_col--; - break; - case '\t': /* HT */ - puttab(t, 1); - break; - case '\r': /* CR */ - b->curs_col = 0; - break; - case '\v': /* VT */ - case '\f': /* FF */ - case '\n': /* LF */ - cursor_line_down(t); - break; - case '\016': /* SO: shift out, invoke the G1 character set */ - t->graphmode = t->charsets[1]; - break; - case '\017': /* SI: shift in, invoke the G0 character set */ - t->graphmode = t->charsets[0]; - break; - } -} - -static -void -is_utf8_locale(void) -{ - const char *cset = nl_langinfo(CODESET); - if (!cset) - cset = "ANSI_X3.4-1968"; - is_utf8 = !strcmp(cset, "UTF-8"); -} - -static -wchar_t -get_vt100_graphic(char c) -{ - static char vt100_acs[] = "`afgjklmnopqrstuvwxyz{|}~"; - - /* - * 5f-7e standard vt100 - * 40-5e rxvt extension for extra curses acs chars - */ - static uint16_t const vt100_utf8[62] = { - 0x2191, 0x2193, 0x2192, 0x2190, 0x2588, 0x259a, 0x2603, // 41-47 - 0, 0, 0, 0, 0, 0, 0, 0, // 48-4f - 0, 0, 0, 0, 0, 0, 0, 0, // 50-57 - 0, 0, 0, 0, 0, 0, 0, 0x0020, // 58-5f - 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1, // 60-67 - 0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba, // 68-6f - 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c, // 70-77 - 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, // 78-7e - }; - - if (is_utf8) - return vt100_utf8[c - 0x41]; - else if (strchr(vt100_acs, c)) - return NCURSES_ACS(c); - return '\0'; -} - -static -void -put_wc(Vt *t, wchar_t wc) -{ - int width = 0; - - if (!t->seen_input) { - t->seen_input = 1; - kill(-t->pid, SIGWINCH); - } - - if (t->escaped) { - if (t->elen + 1 < sizeof(t->ebuf)) { - t->ebuf[t->elen] = wc; - t->ebuf[++t->elen] = '\0'; - try_interpret_escape_seq(t); - } else { - cancel_escape_sequence(t); - } - } else if (IS_CONTROL(wc)) { - process_nonprinting(t, wc); - } else { - if (t->graphmode) { - if (wc >= 0x41 && wc <= 0x7e) { - wchar_t gc = get_vt100_graphic(wc); - if (gc) - wc = gc; - } - width = 1; - } else if ((width = wcwidth(wc)) < 1) { - width = 1; - } - Buffer *b = t->buffer; - Cell blank_cell = { L'\0', build_attrs(b->curattrs), b->curfg, b->curbg }; - if (width == 2 && b->curs_col == b->cols - 1) { - b->curs_row->cells[b->curs_col++] = blank_cell; - b->curs_row->dirty = true; - } - - if (b->curs_col >= b->cols) { - b->curs_col = 0; - cursor_line_down(t); - } - - if (t->insert) { - Cell *src = b->curs_row->cells + b->curs_col; - Cell *dest = src + width; - size_t len = b->cols - b->curs_col - width; - memmove(dest, src, len * sizeof *dest); - } - - b->curs_row->cells[b->curs_col] = blank_cell; - b->curs_row->cells[b->curs_col++].text = wc; - b->curs_row->dirty = true; - if (width == 2) - b->curs_row->cells[b->curs_col++] = blank_cell; - } -} - -int -vt_process(Vt *t) -{ - int res; - uint pos = 0; - mbstate_t ps; - memset(&ps, 0, sizeof(ps)); - - if (t->pty < 0) { - errno = EINVAL; - return -1; - } - - res = read(t->pty, t->rbuf + t->rlen, sizeof(t->rbuf) - t->rlen); - if (res < 0) - return -1; - - t->rlen += res; - while (pos < t->rlen) { - wchar_t wc; - ssize_t len; - - len = (ssize_t)mbrtowc(&wc, t->rbuf + pos, t->rlen - pos, &ps); - if (len == -2) { - t->rlen -= pos; - memmove(t->rbuf, t->rbuf + pos, t->rlen); - return 0; - } - - if (len == -1) { - len = 1; - wc = t->rbuf[pos]; - } - - pos += len ? len : 1; - put_wc(t, wc); - } - - t->rlen -= pos; - memmove(t->rbuf, t->rbuf + pos, t->rlen); - return 0; -} - -void -vt_default_colors_set(Vt *t, attr_t attrs, int fg, int bg) -{ - t->defattrs = attrs; - t->deffg = fg; - t->defbg = bg; -} - -Vt * -vt_create(int rows, int cols, int scroll_size) -{ - if (rows <= 0 || cols <= 0) - return nil; - - Vt *t = calloc(1, sizeof(Vt)); - if (!t) - return nil; - - t->pty = -1; - t->deffg = t->defbg = -1; - t->buffer = &t->buffer_normal; - - if (!buffer_init(&t->buffer_normal, rows, cols, scroll_size) || - !buffer_init(&t->buffer_alternate, rows, cols, 0)) { - free(t); - return nil; - } - - return t; -} - -void -vt_resize(Vt *t, int rows, int cols) -{ - struct winsize ws = { .ws_row = rows, .ws_col = cols }; - - if (rows <= 0 || cols <= 0) - return; - - vt_noscroll(t); - buffer_resize(&t->buffer_normal, rows, cols); - buffer_resize(&t->buffer_alternate, rows, cols); - cursor_clamp(t); - ioctl(t->pty, TIOCSWINSZ, &ws); - kill(-t->pid, SIGWINCH); -} - -void -vt_destroy(Vt *t) -{ - if (!t) - return; - buffer_free(&t->buffer_normal); - buffer_free(&t->buffer_alternate); - close(t->pty); - free(t); -} - -void -vt_dirty(Vt *t) -{ - Buffer *b = t->buffer; - for (Row *row = b->lines, *end = row + b->rows; row < end; row++) - row->dirty = true; -} - -void -vt_draw(Vt *t, WINDOW *win, int srow, int scol) -{ - Buffer *b = t->buffer; - - if (srow != t->srow || scol != t->scol) { - vt_dirty(t); - t->srow = srow; - t->scol = scol; - } - - for (int i = 0; i < b->rows; i++) { - Row *row = b->lines + i; - - if (!row->dirty) - continue; - - wmove(win, srow + i, scol); - Cell *cell = nil; - for (int j = 0; j < b->cols; j++) { - Cell *prev_cell = cell; - cell = row->cells + j; - if (!prev_cell || cell->attr != prev_cell->attr - || cell->fg != prev_cell->fg - || cell->bg != prev_cell->bg) { - if (cell->attr == A_NORMAL) - cell->attr = t->defattrs; - if (cell->fg == -1) - cell->fg = t->deffg; - if (cell->bg == -1) - cell->bg = t->defbg; - wattrset(win, cell->attr << NCURSES_ATTR_SHIFT); - wcolor_set(win, vt_color_get(t, cell->fg, cell->bg), nil); - } - - if (is_utf8 && cell->text >= 128) { - char buf[MB_CUR_MAX + 1]; - size_t len = wcrtomb(buf, cell->text, nil); - if (len > 0) { - waddnstr(win, buf, len); - if (wcwidth(cell->text) > 1) - j++; - } - } else { - waddch(win, cell->text > ' ' ? cell->text : ' '); - } - } - - int x, y; - getyx(win, y, x); - (void)y; - if (x && x < b->cols - 1) - whline(win, ' ', b->cols - x); - - row->dirty = false; - } - - wmove(win, srow + b->curs_row - b->lines, scol + b->curs_col); -} - -void -vt_scroll(Vt *t, int rows) -{ - Buffer *b = t->buffer; - if (!b->scroll_size) - return; - if (rows < 0) { /* scroll back */ - if (rows < -b->scroll_above) - rows = -b->scroll_above; - } else { /* scroll forward */ - if (rows > b->scroll_below) - rows = b->scroll_below; - } - buffer_scroll(b, rows); - b->scroll_below -= rows; -} - -void -vt_noscroll(Vt *t) -{ - int scroll_below = t->buffer->scroll_below; - if (scroll_below) - vt_scroll(t, scroll_below); -} - -pid_t -vt_forkpty(Vt *t, const char *p, const char *argv[], const char *cwd, const char *env[], int *to, int *from) -{ - int vt2ed[2], ed2vt[2]; - struct winsize ws; - ws.ws_row = t->buffer->rows; - ws.ws_col = t->buffer->cols; - ws.ws_xpixel = ws.ws_ypixel = 0; - - if (to && pipe(vt2ed)) { - *to = -1; - to = nil; - } - if (from && pipe(ed2vt)) { - *from = -1; - from = nil; - } - - pid_t pid = forkpty(&t->pty, nil, nil, &ws); - if (pid < 0) - return -1; - - if (pid == 0) { - setsid(); - - sigset_t emptyset; - sigemptyset(&emptyset); - sigprocmask(SIG_SETMASK, &emptyset, nil); - - if (to) { - close(vt2ed[1]); - dup2(vt2ed[0], STDIN_FILENO); - close(vt2ed[0]); - } - - if (from) { - close(ed2vt[0]); - dup2(ed2vt[1], STDOUT_FILENO); - close(ed2vt[1]); - } - - int maxfd = sysconf(_SC_OPEN_MAX); - for (int fd = 3; fd < maxfd; fd++) - if (close(fd) == -1 && errno == EBADF) - break; - - for (const char **envp = env; envp && envp[0]; envp += 2) - setenv(envp[0], envp[1], 1); - setenv("TERM", vt_term, 1); - - if (cwd) - chdir(cwd); - - execvp(p, (char *const *)argv); - fprintf(stderr, "\nexecv() failed.\nCommand: '%s'\n", argv[0]); - exit(1); - } - - if (to) { - close(vt2ed[0]); - *to = vt2ed[1]; - } - - if (from) { - close(ed2vt[1]); - *from = ed2vt[0]; - } - - return t->pid = pid; -} - -int -vt_pty_get(Vt *t) -{ - return t->pty; -} - -ssize_t -vt_write(Vt *t, const char *buf, size_t len) -{ - ssize_t ret = len; - - while (len > 0) { - ssize_t res = write(t->pty, buf, len); - if (res < 0) { - if (errno != EAGAIN && errno != EINTR) - return -1; - continue; - } - buf += res; - len -= res; - } - - return ret; -} - -static -void -send_curs(Vt *t) -{ - Buffer *b = t->buffer; - char keyseq[16]; - snprintf(keyseq, sizeof keyseq, "\e[%d;%dR", (int)(b->curs_row - b->lines), b->curs_col); - vt_write(t, keyseq, strlen(keyseq)); -} - -void -vt_keypress(Vt *t, int keycode) -{ - vt_noscroll(t); - - if (keycode >= 0 && keycode <= KEY_MAX && keytable[keycode]) { - switch (keycode) { - case KEY_UP: - case KEY_DOWN: - case KEY_RIGHT: - case KEY_LEFT: { - char keyseq[3] = { '\e', (t->curskeymode ? 'O' : '['), keytable[keycode][0] }; - vt_write(t, keyseq, sizeof keyseq); - break; - } - default: - vt_write(t, keytable[keycode], strlen(keytable[keycode])); - } - } else if (keycode <= UCHAR_MAX) { - char c = keycode; - vt_write(t, &c, 1); - } else { -#ifndef NDEBUG - fprintf(stderr, "unhandled key %#o\n", keycode); -#endif - } -} - -void -vt_mouse(Vt *t, int x, int y, mmask_t mask) -{ -#ifdef NCURSES_MOUSE_VERSION - char seq[6] = { '\e', '[', 'M' }, state = 0, button = 0; - - if (!t->mousetrack) - return; - - if (mask & (BUTTON1_PRESSED | BUTTON1_CLICKED)) - button = 0; - else if (mask & (BUTTON2_PRESSED | BUTTON2_CLICKED)) - button = 1; - else if (mask & (BUTTON3_PRESSED | BUTTON3_CLICKED)) - button = 2; - else if (mask & (BUTTON1_RELEASED | BUTTON2_RELEASED | BUTTON3_RELEASED)) - button = 3; - - if (mask & BUTTON_SHIFT) - state |= 4; - if (mask & BUTTON_ALT) - state |= 8; - if (mask & BUTTON_CTRL) - state |= 16; - - seq[3] = 32 + button + state; - seq[4] = 32 + x; - seq[5] = 32 + y; - - vt_write(t, seq, sizeof seq); - - if (mask & (BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED)) { - /* send a button release event */ - button = 3; - seq[3] = 32 + button + state; - vt_write(t, seq, sizeof seq); - } -#endif /* NCURSES_MOUSE_VERSION */ -} - -static -uint -color_hash(short fg, short bg) -{ - if (fg == -1) - fg = COLORS; - if (bg == -1) - bg = COLORS + 1; - return fg * (COLORS + 2) + bg; -} - -int -vt_color_get(Vt *t, int fg, int bg) -{ - if (fg >= COLORS) - fg = (t ? t->deffg : default_fg); - if (bg >= COLORS) - bg = (t ? t->defbg : default_bg); - - if (!has_default_colors) { - if (fg == -1) - fg = (t && t->deffg != -1 ? t->deffg : default_fg); - if (bg == -1) - bg = (t && t->defbg != -1 ? t->defbg : default_bg); - } - - if (!color2palette || (fg == -1 && bg == -1)) - return 0; - uint index = color_hash(fg, bg); - if (color2palette[index] == 0) { - int oldfg, oldbg; - for (;;) { - if (++color_pair_current >= color_pairs_max) - color_pair_current = color_pairs_reserved + 1; - extended_pair_content(color_pair_current, &oldfg, &oldbg); - uint old_index = color_hash(oldfg, oldbg); - if (color2palette[old_index] >= 0) { - if (init_extended_pair(color_pair_current, fg, bg) == OK) { - color2palette[old_index] = 0; - color2palette[index] = color_pair_current; - } - break; - } - } - } - - int color_pair = color2palette[index]; - return color_pair >= 0 ? color_pair : -color_pair; -} - -int -vt_color_reserve(int fg, int bg) -{ - if (!color2palette || fg >= COLORS || bg >= COLORS) - return 0; - - if (!has_default_colors && fg == -1) - fg = default_fg; - if (!has_default_colors && bg == -1) - bg = default_bg; - if (fg == -1 && bg == -1) - return 0; - - uint index = color_hash(fg, bg); - if (color2palette[index] >= 0) { - if (init_extended_pair(color_pairs_reserved + 1, fg, bg) == OK) - color2palette[index] = -(++color_pairs_reserved); - } - int color_pair = color2palette[index]; - return color_pair >= 0 ? color_pair : -color_pair; -} - -static -void -init_colors(void) -{ - extended_pair_content(0, &default_fg, &default_bg); - if (default_fg == -1) - default_fg = COLOR_WHITE; - if (default_bg == -1) - default_bg = COLOR_BLACK; - has_default_colors = (use_default_colors() == OK); - color_pairs_max = MIN(MAX_COLOR_PAIRS, SHRT_MAX); - - if (COLORS) - color2palette = calloc((COLORS + 2) * (COLORS + 2), sizeof(int)); - /* - * XXX: On undefined color-pairs NetBSD curses pair_content() set fg - * and bg to default colors while ncurses set them respectively to - * 0 and 0. Initialize all color-pairs in order to have consistent - * behaviour despite the implementation used. - */ - for (short i = 1; i < color_pairs_max; i++) - init_extended_pair(i, 0, 0); - - vt_color_reserve(COLOR_WHITE, COLOR_BLACK); -} - -void -vt_init(void) -{ - init_colors(); - is_utf8_locale(); - char *term = getenv("DVTM_TERM"); - if (!term) - term = "dvtm"; - - snprintf(vt_term, sizeof vt_term, "%s%s", term, COLORS >= 256 ? "-256color" : ""); -} - -void -vt_keytable_set(const char * const keytable_overlay[], int count) -{ - for (int k = 0; k < count && k < KEY_MAX; k++) { - const char *keyseq = keytable_overlay[k]; - if (keyseq) - keytable[k] = keyseq; - } -} - -void -vt_shutdown(void) -{ - free(color2palette); -} - -void -vt_title_handler_set(Vt *t, vt_title_handler_t handler) -{ - t->title_handler = handler; -} - -void -vt_urgent_handler_set(Vt *t, vt_urgent_handler_t handler) -{ - t->urgent_handler = handler; -} - -void -vt_data_set(Vt *t, void *data) -{ - t->data = data; -} - -void * -vt_data_get(Vt *t) -{ - return t->data; -} - -bool -vt_cursor_visible(Vt *t) -{ - return t->buffer->scroll_below ? false : !t->curshid; -} - -pid_t -vt_pid_get(Vt *t) -{ - return t->pid; -} - -size_t -vt_content_get(Vt *t, char **buf, bool colored) -{ - Buffer *b = t->buffer; - int lines = b->scroll_above + b->scroll_below + b->rows + 1; - size_t size = lines * ((b->cols + 1) * ((colored ? 64 : 0) + MB_CUR_MAX)); - mbstate_t ps; - memset(&ps, 0, sizeof(ps)); - - if (!(*buf = malloc(size))) - return 0; - - char *s = *buf; - Cell *prev_cell = nil; - - for (Row *row = buffer_row_first(b); row; row = buffer_row_next(b, row)) { - size_t len = 0; - char *last_non_space = s; - for (int col = 0; col < b->cols; col++) { - Cell *cell = row->cells + col; - if (colored) { - int esclen = 0; - if (!prev_cell || cell->attr != prev_cell->attr) { - attr_t attr = cell->attr << NCURSES_ATTR_SHIFT; - esclen = sprintf(s, "\033[0%s%s%s%s%s%sm", - attr & A_BOLD ? ";1" : "", - attr & A_DIM ? ";2" : "", - attr & A_UNDERLINE ? ";4" : "", - attr & A_BLINK ? ";5" : "", - attr & A_REVERSE ? ";7" : "", - attr & A_INVIS ? ";8" : ""); - if (esclen > 0) - s += esclen; - } - if (!prev_cell || cell->fg != prev_cell->fg || cell->attr != prev_cell->attr) { - if (cell->fg == -1) - esclen = sprintf(s, "\033[39m"); - else - esclen = sprintf(s, "\033[38;5;%dm", cell->fg); - if (esclen > 0) - s += esclen; - } - if (!prev_cell || cell->bg != prev_cell->bg || cell->attr != prev_cell->attr) { - if (cell->bg == -1) - esclen = sprintf(s, "\033[49m"); - else - esclen = sprintf(s, "\033[48;5;%dm", cell->bg); - if (esclen > 0) - s += esclen; - } - prev_cell = cell; - } - if (cell->text) { - len = wcrtomb(s, cell->text, &ps); - if (len > 0) - s += len; - last_non_space = s; - } else if (len) { - len = 0; - } else { - *s++ = ' '; - } - } - - s = last_non_space; - *s++ = '\n'; - } - - return s - *buf; -} - -int -vt_content_start(Vt *t) -{ - return t->buffer->scroll_above; -} |