diff options
Diffstat (limited to 'editors/vi.c')
| -rw-r--r-- | editors/vi.c | 552 |
1 files changed, 276 insertions, 276 deletions
diff --git a/editors/vi.c b/editors/vi.c index e960afc..9db763c 100644 --- a/editors/vi.c +++ b/editors/vi.c @@ -693,6 +693,282 @@ static ALWAYS_INLINE int query_screen_dimensions(void) } #endif +// sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready) +static int mysleep(int hund) +{ + struct pollfd pfd[1]; + + if (hund != 0) + fflush_all(); + + pfd[0].fd = STDIN_FILENO; + pfd[0].events = POLLIN; + return safe_poll(pfd, 1, hund*10) > 0; +} + +//----- Set terminal attributes -------------------------------- +static void rawmode(void) +{ + // no TERMIOS_CLEAR_ISIG: leave ISIG on - allow signals + set_termios_to_raw(STDIN_FILENO, &term_orig, TERMIOS_RAW_CRNL); + erase_char = term_orig.c_cc[VERASE]; +} + +static void cookmode(void) +{ + fflush_all(); + tcsetattr_stdin_TCSANOW(&term_orig); +} + +//----- Terminal Drawing --------------------------------------- +// The terminal is made up of 'rows' line of 'columns' columns. +// classically this would be 24 x 80. +// screen coordinates +// 0,0 ... 0,79 +// 1,0 ... 1,79 +// . ... . +// . ... . +// 22,0 ... 22,79 +// 23,0 ... 23,79 <- status line + +//----- Move the cursor to row x col (count from 0, not 1) ------- +static void place_cursor(int row, int col) +{ + char cm1[sizeof(ESC_SET_CURSOR_POS) + sizeof(int)*3 * 2]; + + if (row < 0) row = 0; + if (row >= rows) row = rows - 1; + if (col < 0) col = 0; + if (col >= columns) col = columns - 1; + + sprintf(cm1, ESC_SET_CURSOR_POS, row + 1, col + 1); + write1(cm1); +} + +//----- Erase from cursor to end of line ----------------------- +static void clear_to_eol(void) +{ + write1(ESC_CLEAR2EOL); +} + +static void go_bottom_and_clear_to_eol(void) +{ + place_cursor(rows - 1, 0); + clear_to_eol(); +} + +//----- Start standout mode ------------------------------------ +static void standout_start(void) +{ + write1(ESC_BOLD_TEXT); +} + +//----- End standout mode -------------------------------------- +static void standout_end(void) +{ + write1(ESC_NORM_TEXT); +} + +//----- Text Movement Routines --------------------------------- +static char *begin_line(char *p) // return pointer to first char cur line +{ + if (p > text) { + p = memrchr(text, '\n', p - text); + if (!p) + return text; + return p + 1; + } + return p; +} + +static char *end_line(char *p) // return pointer to NL of cur line +{ + if (p < end - 1) { + p = memchr(p, '\n', end - p - 1); + if (!p) + return end - 1; + } + return p; +} + +static char *dollar_line(char *p) // return pointer to just before NL line +{ + p = end_line(p); + // Try to stay off of the Newline + if (*p == '\n' && (p - begin_line(p)) > 0) + p--; + return p; +} + +static char *prev_line(char *p) // return pointer first char prev line +{ + p = begin_line(p); // goto beginning of cur line + if (p > text && p[-1] == '\n') + p--; // step to prev line + p = begin_line(p); // goto beginning of prev line + return p; +} + +static char *next_line(char *p) // return pointer first char next line +{ + p = end_line(p); + if (p < end - 1 && *p == '\n') + p++; // step to next line + return p; +} + +//----- Text Information Routines ------------------------------ +static char *end_screen(void) +{ + char *q; + int cnt; + + // find new bottom line + q = screenbegin; + for (cnt = 0; cnt < rows - 2; cnt++) + q = next_line(q); + q = end_line(q); + return q; +} + +// count line from start to stop +static int count_lines(char *start, char *stop) +{ + char *q; + int cnt; + + if (stop < start) { // start and stop are backwards- reverse them + q = start; + start = stop; + stop = q; + } + cnt = 0; + stop = end_line(stop); + while (start <= stop && start <= end - 1) { + start = end_line(start); + if (*start == '\n') + cnt++; + start++; + } + return cnt; +} + +static char *find_line(int li) // find beginning of line #li +{ + char *q; + + for (q = text; li > 1; li--) { + q = next_line(q); + } + return q; +} + +static int next_tabstop(int col) +{ + return col + ((tabstop - 1) - (col % tabstop)); +} + +//----- Erase the Screen[] memory ------------------------------ +static void screen_erase(void) +{ + memset(screen, ' ', screensize); // clear new screen +} + +//----- Synchronize the cursor to Dot -------------------------- +static NOINLINE void sync_cursor(char *d, int *row, int *col) +{ + char *beg_cur; // begin and end of "d" line + char *tp; + int cnt, ro, co; + + beg_cur = begin_line(d); // first char of cur line + + if (beg_cur < screenbegin) { + // "d" is before top line on screen + // how many lines do we have to move + cnt = count_lines(beg_cur, screenbegin); + sc1: + screenbegin = beg_cur; + if (cnt > (rows - 1) / 2) { + // we moved too many lines. put "dot" in middle of screen + for (cnt = 0; cnt < (rows - 1) / 2; cnt++) { + screenbegin = prev_line(screenbegin); + } + } + } else { + char *end_scr; // begin and end of screen + end_scr = end_screen(); // last char of screen + if (beg_cur > end_scr) { + // "d" is after bottom line on screen + // how many lines do we have to move + cnt = count_lines(end_scr, beg_cur); + if (cnt > (rows - 1) / 2) + goto sc1; // too many lines + for (ro = 0; ro < cnt - 1; ro++) { + // move screen begin the same amount + screenbegin = next_line(screenbegin); + // now, move the end of screen + end_scr = next_line(end_scr); + end_scr = end_line(end_scr); + } + } + } + // "d" is on screen- find out which row + tp = screenbegin; + for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row + if (tp == beg_cur) + break; + tp = next_line(tp); + } + + // find out what col "d" is on + co = 0; + while (tp < d) { // drive "co" to correct column + if (*tp == '\n') //vda || *tp == '\0') + break; + if (*tp == '\t') { + // handle tabs like real vi + if (d == tp && cmd_mode) { + break; + } + co = next_tabstop(co); + } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) { + co++; // display as ^X, use 2 columns + } + co++; + tp++; + } + + // "co" is the column where "dot" is. + // The screen has "columns" columns. + // The currently displayed columns are 0+offset -- columns+ofset + // |-------------------------------------------------------------| + // ^ ^ ^ + // offset | |------- columns ----------------| + // + // If "co" is already in this range then we do not have to adjust offset + // but, we do have to subtract the "offset" bias from "co". + // If "co" is outside this range then we have to change "offset". + // If the first char of a line is a tab the cursor will try to stay + // in column 7, but we have to set offset to 0. + + if (co < 0 + offset) { + offset = co; + } + if (co >= columns + offset) { + offset = co - columns + 1; + } + // if the first char of the line is a tab, and "dot" is sitting on it + // force offset to 0. + if (d == beg_cur && *d == '\t') { + offset = 0; + } + co -= offset; + + *row = ro; + *col = co; +} + //----- The Colon commands ------------------------------------- #if ENABLE_FEATURE_VI_COLON static char *get_one_address(char *p, int *addr) // get colon addr, if present @@ -1355,200 +1631,6 @@ static void Hit_Return(void) redraw(TRUE); // force redraw all } -static int next_tabstop(int col) -{ - return col + ((tabstop - 1) - (col % tabstop)); -} - -//----- Synchronize the cursor to Dot -------------------------- -static NOINLINE void sync_cursor(char *d, int *row, int *col) -{ - char *beg_cur; // begin and end of "d" line - char *tp; - int cnt, ro, co; - - beg_cur = begin_line(d); // first char of cur line - - if (beg_cur < screenbegin) { - // "d" is before top line on screen - // how many lines do we have to move - cnt = count_lines(beg_cur, screenbegin); - sc1: - screenbegin = beg_cur; - if (cnt > (rows - 1) / 2) { - // we moved too many lines. put "dot" in middle of screen - for (cnt = 0; cnt < (rows - 1) / 2; cnt++) { - screenbegin = prev_line(screenbegin); - } - } - } else { - char *end_scr; // begin and end of screen - end_scr = end_screen(); // last char of screen - if (beg_cur > end_scr) { - // "d" is after bottom line on screen - // how many lines do we have to move - cnt = count_lines(end_scr, beg_cur); - if (cnt > (rows - 1) / 2) - goto sc1; // too many lines - for (ro = 0; ro < cnt - 1; ro++) { - // move screen begin the same amount - screenbegin = next_line(screenbegin); - // now, move the end of screen - end_scr = next_line(end_scr); - end_scr = end_line(end_scr); - } - } - } - // "d" is on screen- find out which row - tp = screenbegin; - for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row - if (tp == beg_cur) - break; - tp = next_line(tp); - } - - // find out what col "d" is on - co = 0; - while (tp < d) { // drive "co" to correct column - if (*tp == '\n') //vda || *tp == '\0') - break; - if (*tp == '\t') { - // handle tabs like real vi - if (d == tp && cmd_mode) { - break; - } - co = next_tabstop(co); - } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) { - co++; // display as ^X, use 2 columns - } - co++; - tp++; - } - - // "co" is the column where "dot" is. - // The screen has "columns" columns. - // The currently displayed columns are 0+offset -- columns+ofset - // |-------------------------------------------------------------| - // ^ ^ ^ - // offset | |------- columns ----------------| - // - // If "co" is already in this range then we do not have to adjust offset - // but, we do have to subtract the "offset" bias from "co". - // If "co" is outside this range then we have to change "offset". - // If the first char of a line is a tab the cursor will try to stay - // in column 7, but we have to set offset to 0. - - if (co < 0 + offset) { - offset = co; - } - if (co >= columns + offset) { - offset = co - columns + 1; - } - // if the first char of the line is a tab, and "dot" is sitting on it - // force offset to 0. - if (d == beg_cur && *d == '\t') { - offset = 0; - } - co -= offset; - - *row = ro; - *col = co; -} - -//----- Text Movement Routines --------------------------------- -static char *begin_line(char *p) // return pointer to first char cur line -{ - if (p > text) { - p = memrchr(text, '\n', p - text); - if (!p) - return text; - return p + 1; - } - return p; -} - -static char *end_line(char *p) // return pointer to NL of cur line -{ - if (p < end - 1) { - p = memchr(p, '\n', end - p - 1); - if (!p) - return end - 1; - } - return p; -} - -static char *dollar_line(char *p) // return pointer to just before NL line -{ - p = end_line(p); - // Try to stay off of the Newline - if (*p == '\n' && (p - begin_line(p)) > 0) - p--; - return p; -} - -static char *prev_line(char *p) // return pointer first char prev line -{ - p = begin_line(p); // goto beginning of cur line - if (p > text && p[-1] == '\n') - p--; // step to prev line - p = begin_line(p); // goto beginning of prev line - return p; -} - -static char *next_line(char *p) // return pointer first char next line -{ - p = end_line(p); - if (p < end - 1 && *p == '\n') - p++; // step to next line - return p; -} - -//----- Text Information Routines ------------------------------ -static char *end_screen(void) -{ - char *q; - int cnt; - - // find new bottom line - q = screenbegin; - for (cnt = 0; cnt < rows - 2; cnt++) - q = next_line(q); - q = end_line(q); - return q; -} - -// count line from start to stop -static int count_lines(char *start, char *stop) -{ - char *q; - int cnt; - - if (stop < start) { // start and stop are backwards- reverse them - q = start; - start = stop; - stop = q; - } - cnt = 0; - stop = end_line(stop); - while (start <= stop && start <= end - 1) { - start = end_line(start); - if (*start == '\n') - cnt++; - start++; - } - return cnt; -} - -static char *find_line(int li) // find beginning of line #li -{ - char *q; - - for (q = text; li > 1; li--) { - q = next_line(q); - } - return q; -} - //----- Dot Movement Routines ---------------------------------- static void dot_left(void) { @@ -2430,32 +2512,6 @@ static char *swap_context(char *p) // goto new context for '' command make this } #endif /* FEATURE_VI_YANKMARK */ -//----- Set terminal attributes -------------------------------- -static void rawmode(void) -{ - // no TERMIOS_CLEAR_ISIG: leave ISIG on - allow signals - set_termios_to_raw(STDIN_FILENO, &term_orig, TERMIOS_RAW_CRNL); - erase_char = term_orig.c_cc[VERASE]; -} - -static void cookmode(void) -{ - fflush_all(); - tcsetattr_stdin_TCSANOW(&term_orig); -} - -static int mysleep(int hund) // sleep for 'hund' 1/100 seconds or stdin ready -{ - struct pollfd pfd[1]; - - if (hund != 0) - fflush_all(); - - pfd[0].fd = STDIN_FILENO; - pfd[0].events = POLLIN; - return safe_poll(pfd, 1, hund*10) > 0; -} - //----- IO Routines -------------------------------------------- static int readit(void) // read (maybe cursor) key from stdin { @@ -2637,55 +2693,6 @@ static int file_write(char *fn, char *first, char *last) return charcnt; } -//----- Terminal Drawing --------------------------------------- -// The terminal is made up of 'rows' line of 'columns' columns. -// classically this would be 24 x 80. -// screen coordinates -// 0,0 ... 0,79 -// 1,0 ... 1,79 -// . ... . -// . ... . -// 22,0 ... 22,79 -// 23,0 ... 23,79 <- status line - -//----- Move the cursor to row x col (count from 0, not 1) ------- -static void place_cursor(int row, int col) -{ - char cm1[sizeof(ESC_SET_CURSOR_POS) + sizeof(int)*3 * 2]; - - if (row < 0) row = 0; - if (row >= rows) row = rows - 1; - if (col < 0) col = 0; - if (col >= columns) col = columns - 1; - - sprintf(cm1, ESC_SET_CURSOR_POS, row + 1, col + 1); - write1(cm1); -} - -//----- Erase from cursor to end of line ----------------------- -static void clear_to_eol(void) -{ - write1(ESC_CLEAR2EOL); -} - -static void go_bottom_and_clear_to_eol(void) -{ - place_cursor(rows - 1, 0); - clear_to_eol(); -} - -//----- Start standout mode ------------------------------------ -static void standout_start(void) -{ - write1(ESC_BOLD_TEXT); -} - -//----- End standout mode -------------------------------------- -static void standout_end(void) -{ - write1(ESC_NORM_TEXT); -} - //----- Flash the screen -------------------------------------- static void flash(int h) { @@ -2709,13 +2716,6 @@ static void indicate_error(void) } } -//----- Screen[] Routines -------------------------------------- -//----- Erase the Screen[] memory ------------------------------ -static void screen_erase(void) -{ - memset(screen, ' ', screensize); // clear new screen -} - static int bufsum(char *buf, int count) { int sum = 0; |