diff options
| -rw-r--r-- | editors/vi.c | 188 |
1 files changed, 112 insertions, 76 deletions
diff --git a/editors/vi.c b/editors/vi.c index 374d161..ae86b72 100644 --- a/editors/vi.c +++ b/editors/vi.c @@ -166,8 +166,9 @@ static int vi_setops; static int editing; // >0 while we are editing a file -static int cmd_mode; // 0=command 1=insert +static int cmd_mode; // 0=command 1=insert 2=replace static int file_modified; // buffer contents changed +static int last_file_modified = -1; static int fn_start; // index of first cmd line file name static int save_argc; // how many file names on cmd line static int cmdcnt; // repetition count @@ -176,6 +177,9 @@ static struct timeval tv; // use select() for small sleeps static int rows, columns; // the terminal screen is this size static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset static Byte *status_buffer; // mesages to the user +#define STATUS_BUFFER_LEN 200 +static int have_status_msg; // is default edit status needed? +static int last_status_cksum; // hash of current status line static Byte *cfn; // previous, current, and next file name static Byte *text, *end, *textend; // pointers to the user data in memory static Byte *screen; // pointer to the virtual screen buffer @@ -272,7 +276,7 @@ static void show_status_line(void); // put a message on the bottom line static void psb(const char *, ...); // Print Status Buf static void psbs(const char *, ...); // Print Status Buf in standout mode static void ni(Byte *); // display messages -static void edit_status(void); // show file status on status line +static int format_edit_status(void); // format file status on status line static void redraw(int); // force a full screen refresh static void format_line(Byte*, Byte*, int); static void refresh(int); // update the terminal from screen[] @@ -331,7 +335,7 @@ static void write1(const char *out) extern int vi_main(int argc, char **argv) { int c; - RESERVE_CONFIG_BUFFER(STATUS_BUFFER, 200); + RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN); #ifdef CONFIG_FEATURE_VI_YANKMARK int i; @@ -344,7 +348,7 @@ extern int vi_main(int argc, char **argv) #endif /* CONFIG_FEATURE_VI_CRASHME */ status_buffer = STATUS_BUFFER; - *status_buffer = '\0'; // clear status buffer + last_status_cksum = 0; #ifdef CONFIG_FEATURE_VI_READONLY vi_readonly = readonly = FALSE; @@ -450,7 +454,8 @@ static void edit_file(Byte * fn) if (ch < 1) { (void) char_insert(text, '\n'); // start empty buf with dummy line } - file_modified = FALSE; + file_modified = 0; + last_file_modified = -1; #ifdef CONFIG_FEATURE_VI_YANKMARK YDreg = 26; // default Yank/Delete reg Ureg = 27; // hold orig line for "U" cmd @@ -506,7 +511,6 @@ static void edit_file(Byte * fn) adding2q = 0; #endif /* CONFIG_FEATURE_VI_DOT_CMD */ redraw(FALSE); // dont force every col re-draw - edit_status(); show_status_line(); //------This is the main Vi cmd handling loop ----------------------- @@ -834,7 +838,8 @@ static void colon(Byte * buf) (void) char_insert(text, '\n'); ch= 1; } - file_modified = FALSE; + file_modified = 0; + last_file_modified = -1; #ifdef CONFIG_FEATURE_VI_YANKMARK if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) { free(reg[Ureg]); // free orig line reg- for 'U' @@ -871,8 +876,7 @@ static void colon(Byte * buf) cfn = (Byte *) bb_xstrdup((char *) args); } else { // user wants file status info - edit_status(); - show_status_line(); + last_status_cksum = 0; // force status update } } else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available // print out values of all features @@ -978,7 +982,7 @@ static void colon(Byte * buf) // if the insert is before "dot" then we need to update if (q <= dot) dot += ch; - file_modified = TRUE; + file_modified++; } } else if (strncasecmp((char *) cmd, "rewind", i) == 0) { // rewind cmd line args if (file_modified && ! useforce) { @@ -1109,8 +1113,10 @@ static void colon(Byte * buf) forced = FALSE; } psb("\"%s\" %dL, %dC", fn, li, l); - if (q == text && r == end - 1 && l == ch) - file_modified = FALSE; + if (q == text && r == end - 1 && l == ch) { + file_modified = 0; + last_file_modified = -1; + } if ((cmd[0] == 'x' || cmd[1] == 'q') && l == ch) { editing = 0; } @@ -1335,30 +1341,22 @@ static void dot_left(void) { if (dot > text && dot[-1] != '\n') dot--; - edit_status(); // show current file status - show_status_line(); } static void dot_right(void) { if (dot < end - 1 && *dot != '\n') dot++; - edit_status(); // show current file status - show_status_line(); } static void dot_begin(void) { dot = begin_line(dot); // return pointer to first char cur line - edit_status(); // show current file status - show_status_line(); } static void dot_end(void) { dot = end_line(dot); // return pointer to last char cur line - edit_status(); // show current file status - show_status_line(); } static Byte *move_to_col(Byte * p, int l) @@ -1383,15 +1381,11 @@ static Byte *move_to_col(Byte * p, int l) static void dot_next(void) { dot = next_line(dot); - edit_status(); // show current file status - show_status_line(); } static void dot_prev(void) { dot = prev_line(dot); - edit_status(); // show current file status - show_status_line(); } static void dot_scroll(int cnt, int dir) @@ -1416,8 +1410,6 @@ static void dot_scroll(int cnt, int dir) if (dot > q) dot = begin_line(q); // is dot is below bottom line? dot_skip_over_ws(); - edit_status(); // show current file status - show_status_line(); } static void dot_skip_over_ws(void) @@ -1603,12 +1595,12 @@ static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p' c = get_one_char(); *p = c; p++; - file_modified = TRUE; // has the file been modified + file_modified++; // has the file been modified } else if (c == 27) { // Is this an ESC? cmd_mode = 0; cmdcnt = 0; end_cmd_q(); // stop adding to q - *status_buffer = '\0'; // clear the status buffer + last_status_cksum = 0; // force status update if ((p[-1] != '\n') && (dot>text)) { p--; } @@ -1658,7 +1650,7 @@ static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p p = text_hole_make(p, 1); if (p != 0) { *p = c; - file_modified = TRUE; // has the file been modified + file_modified++; // has the file been modified p++; } return (p); @@ -1856,7 +1848,7 @@ static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte ho } memset(p, ' ', size); // clear new hole end = end + size; // adjust the new END - file_modified = TRUE; // has the file been modified + file_modified++; // has the file been modified thm0: return (p); } @@ -1892,7 +1884,7 @@ static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclus dest = end - 1; // make sure dest in below end-1 if (end <= text) dest = end = text; // keep pointers valid - file_modified = TRUE; // has the file been modified + file_modified++; // has the file been modified thd0: return (dest); } @@ -2162,7 +2154,7 @@ static void winch_sig(int sig) static void cont_sig(int sig) { rawmode(); // terminal to "raw" - *status_buffer = '\0'; // clear the status buffer + last_status_cksum = 0; // force status update redraw(TRUE); // re-draw the screen signal(SIGTSTP, suspend_sig); @@ -2407,7 +2399,7 @@ static Byte *get_input_line(Byte * prompt) // get input line- use "status line" static Byte *obufp = NULL; strcpy((char *) buf, (char *) prompt); - *status_buffer = '\0'; // clear the status buffer + last_status_cksum = 0; // force status update place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen clear_to_eol(); // clear the line write1(prompt); // write out the :, /, or ? prompt @@ -2512,7 +2504,7 @@ static int file_insert(Byte * fn, Byte * p, int size) psbs("could not read all of file \"%s\"", fn); } if (cnt >= size) - file_modified = TRUE; + file_modified++; fi0: return (cnt); } @@ -2670,28 +2662,46 @@ static void screen_erase(void) memset(screen, ' ', screensize); // clear new screen } +static int bufsum(char *buf, int count) +{ + int sum = 0; + char *e = buf + count; + while (buf < e) + sum += *buf++; + return sum; +} + //----- Draw the status line at bottom of the screen ------------- static void show_status_line(void) { - static int last_cksum; - int l, cnt, cksum; + int cnt, cksum; - //edit_status(); - cnt = strlen((char *) status_buffer); - for (cksum= l= 0; l < cnt; l++) { cksum += (int)(status_buffer[l]); } - // don't write the status line unless it changes - if (cnt > 0 && last_cksum != cksum) { - last_cksum= cksum; // remember if we have seen this line + // either we already have an error or status message, or we + // create one. + if (!have_status_msg) { + cnt = format_edit_status(); + cksum = bufsum(status_buffer, cnt); + } + if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) { + last_status_cksum= cksum; // remember if we have seen this line place_cursor(rows - 1, 0, FALSE); // put cursor on status line write1(status_buffer); clear_to_eol(); + if (have_status_msg) { + if ((strlen(status_buffer) - (have_status_msg - 1)) > + (columns - 1) ) { + have_status_msg = 0; + Hit_Return(); + } + have_status_msg = 0; + } place_cursor(crow, ccol, FALSE); // put cursor back in correct place } fflush(stdout); } //----- format the status buffer, the bottom line of screen ------ -// print status buffer, with STANDOUT mode +// format status buffer, with STANDOUT mode static void psbs(const char *format, ...) { va_list args; @@ -2701,12 +2711,13 @@ static void psbs(const char *format, ...) vsprintf((char *) status_buffer + strlen((char *) status_buffer), format, args); strcat((char *) status_buffer, SOn); // Terminal standout mode off va_end(args); - show_status_line(); + + have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2; return; } -// print status buffer +// format status buffer static void psb(const char *format, ...) { va_list args; @@ -2714,7 +2725,9 @@ static void psb(const char *format, ...) va_start(args, format); vsprintf((char *) status_buffer, format, args); va_end(args); - show_status_line(); + + have_status_msg = 1; + return; } @@ -2726,12 +2739,28 @@ static void ni(Byte * s) // display messages psbs("\'%s\' is not implemented", buf); } -static void edit_status(void) // show file status on status line +static int format_edit_status(void) // show file status on status line { - int cur, tot, percent; + int cur, percent, ret, trunc_at; + static int tot; + // file_modified is now a counter rather than a flag. this + // helps reduce the amount of line counting we need to do. + // (this will cause a mis-reporting of modified status + // once every MAXINT editing operations.) + + // it would be nice to do a similar optimization here -- if + // we haven't done a motion that could have changed which line + // we're on, then we shouldn't have to do this count_lines() cur = count_lines(text, dot); - tot = count_lines(text, end - 1); + + // reduce counting -- the total lines can't have + // changed if we haven't done any edits. + if (file_modified != last_file_modified) { + tot = cur + count_lines(dot, end - 1) - 1; + last_file_modified = file_modified; + } + // current line percent // ------------- ~~ ---------- // total lines 100 @@ -2742,18 +2771,27 @@ static void edit_status(void) // show file status on status line percent = 100; } - sprintf((char *) status_buffer, - "\"%s\"" + trunc_at = columns < STATUS_BUFFER_LEN-1 ? + columns : STATUS_BUFFER_LEN-1; + + ret = snprintf((char *) status_buffer, trunc_at+1, #ifdef CONFIG_FEATURE_VI_READONLY - "%s" -#endif /* CONFIG_FEATURE_VI_READONLY */ - "%s line %d of %d --%d%%--", - (cfn != 0 ? (char *) cfn : "No file"), + "%c %s%s%s %d/%d %d%%", +#else + "%c %s%s %d/%d %d%%", +#endif + (cmd_mode ? (cmd_mode == 2 ? 'R':'I'):'-'), + (cfn != 0 ? (char *) cfn : "No file"), #ifdef CONFIG_FEATURE_VI_READONLY - ((vi_readonly || readonly) ? " [Read only]" : ""), -#endif /* CONFIG_FEATURE_VI_READONLY */ - (file_modified ? " [modified]" : ""), - cur, tot, percent); + ((vi_readonly || readonly) ? " [Read-only]" : ""), +#endif + (file_modified ? " [modified]" : ""), + cur, tot, percent); + + if (ret >= 0 && ret < trunc_at) + return ret; /* it all fit */ + + return trunc_at; /* had to truncate */ } //----- Force refresh of all Lines ----------------------------- @@ -2762,7 +2800,9 @@ static void redraw(int full_screen) place_cursor(0, 0, FALSE); // put cursor in correct place clear_to_eos(); // tel terminal to erase display screen_erase(); // erase the internal screen buffer + last_status_cksum = 0; // force status update refresh(full_screen); // this will redraw the entire display + show_status_line(); } //----- Format a text[] line into a buffer --------------------- @@ -2899,8 +2939,6 @@ static void refresh(int full_screen) #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */ } - edit_status(); // show current file status - show_status_line(); // write line out to terminal { int nic = ce-cs+1; @@ -2960,6 +2998,8 @@ static void do_cmd(Byte c) p = q = save_dot = msg = buf; // quiet the compiler memset(buf, '\0', 9); // clear buf + show_status_line(); + /* if this is a cursor key, skip these checks */ switch (c) { case VI_K_UP: @@ -3079,8 +3119,7 @@ key_cmd_mode: dot_scroll(rows - 2, 1); break; case 7: // ctrl-G show current status - edit_status(); - show_status_line(); + last_status_cksum = 0; // force status update break; case 'h': // h- move left case VI_K_LEFT: // cursor key Left @@ -3090,8 +3129,6 @@ key_cmd_mode: do_cmd(c); } // repeat cnt dot_left(); - edit_status(); // show current file status - show_status_line(); break; case 10: // Newline ^J case 'j': // j- goto next line, same col @@ -3108,6 +3145,7 @@ key_cmd_mode: clear_to_eos(); // tel terminal to erase display (void) mysleep(10); screen_erase(); // erase the internal screen buffer + last_status_cksum = 0; // force status update refresh(TRUE); // this will redraw the entire display break; case 13: // Carriage Return ^M @@ -3129,7 +3167,7 @@ key_cmd_mode: indicate_error(c); cmd_mode = 0; // stop insrting end_cmd_q(); - *status_buffer = '\0'; // clear status buffer + last_status_cksum = 0; // force status update break; case ' ': // move right case 'l': // move right @@ -3349,7 +3387,7 @@ key_cmd_mode: msg = (Byte *) "Pattern not found"; } dc2: - psbs("%s", msg); + if (*msg) psbs("%s", msg); break; case '{': // {- move backward paragraph q = char_search(dot, (Byte *) "\n\n", BACK, FULL); @@ -3401,14 +3439,14 @@ key_cmd_mode: strncasecmp((char *) p, "wq", cnt) == 0 || strncasecmp((char *) p, "x", cnt) == 0) { cnt = file_write(cfn, text, end - 1); - file_modified = FALSE; + file_modified = 0; + last_file_modified = -1; psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt); if (p[0] == 'x' || p[1] == 'q') { editing = 0; } } else if (strncasecmp((char *) p, "file", cnt) == 0 ) { - edit_status(); // show current file status - show_status_line(); + last_status_cksum = 0; // force status update } else if (sscanf((char *) p, "%d", &j) > 0) { dot = find_line(j); // go to line # j dot_skip_over_ws(); @@ -3509,7 +3547,6 @@ key_cmd_mode: case VI_K_INSERT: // Cursor Key Insert dc_i: cmd_mode = 1; // start insrting - psb("-- Insert --"); break; case 'J': // J- join current and next lines together if (cmdcnt-- > 2) { @@ -3518,7 +3555,7 @@ key_cmd_mode: dot_end(); // move to NL if (dot < end - 1) { // make sure not last char in text[] *dot++ = ' '; // replace NL with space - file_modified = TRUE; + file_modified++; while (isblnk(*dot)) { // delete leading WS dot_delete(); } @@ -3559,7 +3596,6 @@ key_cmd_mode: case 'R': // R- continuous Replace char dc5: cmd_mode = 2; - psb("-- Replace --"); break; case 'X': // X- delete char before dot case 'x': // x- delete the current char @@ -3709,7 +3745,7 @@ key_cmd_mode: c1 = get_one_char(); // get the replacement char if (*dot != '\n') { *dot = c1; - file_modified = TRUE; // has the file been modified + file_modified++; // has the file been modified } end_cmd_q(); // stop adding to q break; @@ -3754,10 +3790,10 @@ key_cmd_mode: } // repeat cnt if (islower(*dot)) { *dot = toupper(*dot); - file_modified = TRUE; // has the file been modified + file_modified++; // has the file been modified } else if (isupper(*dot)) { *dot = tolower(*dot); - file_modified = TRUE; // has the file been modified + file_modified++; // has the file been modified } dot_right(); end_cmd_q(); // stop adding to q |