*/
char *vi_Version =
- "$Id: vi.c,v 1.5 2001/04/26 15:56:47 andersen Exp $";
+ "$Id: vi.c,v 1.6 2001/05/07 17:37:43 andersen Exp $";
/*
* To compile for standalone use:
* gcc -Wall -Os -s -DSTANDALONE -o vi vi.c
* or
- * gcc -Wall -Os -s -DSTANDALONE -DCRASHME -o vi vi.c # include testing features
+ * gcc -Wall -Os -s -DSTANDALONE -DBB_FEATURE_VI_CRASHME -o vi vi.c # include testing features
* strip vi
*/
//---- Feature -------------- Bytes to immplement
#ifdef STANDALONE
-#define vi_main main
+#define vi_main main
#define BB_FEATURE_VI_COLON // 4288
#define BB_FEATURE_VI_YANKMARK // 1408
#define BB_FEATURE_VI_SEARCH // 1088
// To stop testing, wait until all to text[] is deleted, or
// Ctrl-Z and kill -9 %1
// while in the editor Ctrl-T will toggle the crashme function on and off.
-//#define BB_FEATURE_VI_CRASHME // randomly pick commands to execute
+//#define BB_FEATURE_VI_CRASHME // randomly pick commands to execute
#endif /* STANDALONE */
#ifndef STANDALONE
static char erase_char; // the users erase character
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 char *SOs, *SOn;
+static char *SOs, *SOn; // terminal standout start/normal ESC sequence
+static char *bell; // terminal bell sequence
+static char *Ceol, *Ceos; // Clear-end-of-line and Clear-end-of-screen ESC sequence
+static char *CMrc; // Cursor motion arbitrary destination ESC sequence
+static char *CMup, *CMdown; // Cursor motion up and down ESC sequence
static Byte *status_buffer; // mesages to the user
static Byte last_input_char; // last char read from user
static Byte last_forward_char; // last char searched for with 'f'
static int tabstop;
static struct termios term_orig, term_vi; // remember what the cooked mode was
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+static int last_row; // where the cursor was last moved to
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
#ifdef BB_FEATURE_VI_USE_SIGNALS
static jmp_buf restart; // catch_sig()
#endif /* BB_FEATURE_VI_USE_SIGNALS */
static Byte *modifying_cmds; // cmds that modify text[]
#endif /* BB_FEATURE_VI_DOT_CMD || BB_FEATURE_VI_YANKMARK */
#ifdef BB_FEATURE_VI_READONLY
-static int readonly;
+static int vi_readonly, readonly;
#endif /* BB_FEATURE_VI_READONLY */
#ifdef BB_FEATURE_VI_SETOPTS
static int autoindent;
static int file_size(Byte *); // what is the byte size of "fn"
static int file_insert(Byte *, Byte *, int);
static int file_write(Byte *, Byte *, Byte *);
-static void place_cursor(int, int);
+static void place_cursor(int, int, int);
static void screen_erase();
static void clear_to_eol(void);
static void clear_to_eos(void);
static void ni(Byte *); // display messages
static void edit_status(void); // show 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[]
#ifdef BB_FEATURE_VI_SEARCH
static Byte *get_address(Byte *, int *, int *); // get two colon addrs, if present
static void colon(Byte *); // execute the "colon" mode cmds
#endif /* BB_FEATURE_VI_COLON */
-#if defined(BB_FEATURE_VI_SEARCH) || defined(BB_FEATURE_VI_COLON)
static Byte *get_input_line(Byte *); // get input line- use "status line"
-#endif /* BB_FEATURE_VI_SEARCH || BB_FEATURE_VI_COLON */
#ifdef BB_FEATURE_VI_USE_SIGNALS
static void winch_sig(int); // catch window size changes
static void suspend_sig(int); // catch ctrl-Z
int i;
#endif /* BB_FEATURE_VI_YANKMARK */
+ CMrc= "\033[%d;%dH"; // Terminal Crusor motion ESC sequence
+ CMup= "\033[A"; // move cursor up one line, same col
+ CMdown="\n"; // move cursor down one line, same col
+ Ceol= "\033[0K"; // Clear from cursor to end of line
+ Ceos= "\033[0J"; // Clear from cursor to end of screen
SOs = "\033[7m"; // Terminal standout mode on
SOn = "\033[0m"; // Terminal standout mode off
+ bell= "\007"; // Terminal bell sequence
#ifdef BB_FEATURE_VI_CRASHME
(void) srand((long) getpid());
#endif /* BB_FEATURE_VI_CRASHME */
status_buffer = (Byte *) malloc(200); // hold messages to user
#ifdef BB_FEATURE_VI_READONLY
- readonly = FALSE;
+ vi_readonly = readonly = FALSE;
if (strncmp(argv[0], "view", 4) == 0) {
readonly = TRUE;
+ vi_readonly = TRUE;
}
#endif /* BB_FEATURE_VI_READONLY */
#ifdef BB_FEATURE_VI_SETOPTS
readonly = TRUE;
break;
#endif /* BB_FEATURE_VI_READONLY */
- //case 'r': // recover flag- ignore- we don't use tmp file
- //case 'x': // encryption flag- ignore
- //case 'c': // execute command first
- //case 'h': // help -- just use default
+ //case 'r': // recover flag- ignore- we don't use tmp file
+ //case 'x': // encryption flag- ignore
+ //case 'c': // execute command first
+ //case 'h': // help -- just use default
default:
show_help();
break;
rawmode();
rows = 24;
columns = 80;
+ ch= -1;
#ifdef BB_FEATURE_VI_WIN_RESIZE
window_size_get(0);
#endif /* BB_FEATURE_VI_WIN_RESIZE */
new_screen(rows, columns); // get memory for virtual screen
- ch= 0;
cnt = file_size(fn); // file size
size = 2 * cnt; // 200% of file size
new_text(size); // get a text[] buffer
ioq = ioq_start = last_modifying_cmd = 0;
adding2q = 0;
#endif /* BB_FEATURE_VI_DOT_CMD */
- redraw(TRUE);
+ redraw(FALSE); // dont force every col re-draw
show_status_line();
//------This is the main Vi cmd handling loop -----------------------
}
//-------------------------------------------------------------------
- place_cursor(rows, 0); // go to bottom of screen
+ place_cursor(rows, 0, FALSE); // go to bottom of screen
clear_to_eol(); // Erase to end of line
cookmode();
}
i = (int) lrand48() % strlen(cmd);
cm = cmd[i];
if (strchr(":\024", cm))
- goto cd0; // dont allow these commands
+ goto cd0; // dont allow colon or ctrl-T commands
readbuffer[rbi++] = cm; // put cmd into input buffer
// now we have the command-
if (strlen(msg) > 0) {
alarm(0);
- sprintf(buf, "\n\n%d: \'%c\' ", totalcmds, last_input_char);
+ sprintf(buf, "\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
+ totalcmds, last_input_char, msg, SOs, SOn);
write(1, buf, strlen(buf));
- write(1, msg, strlen(msg));
- write(1, "\n\n\n", 3);
- write(1, "\033[7m[Hit return to continue]\033[0m", 32);
while (read(0, d, 1) > 0) {
if (d[0] == '\n' || d[0] == '\r')
break;
}
switch (c) {
- //case 0x01: // soh
- //case 0x09: // ht
- //case 0x0b: // vt
- //case 0x0e: // so
- //case 0x0f: // si
- //case 0x10: // dle
- //case 0x11: // dc1
- //case 0x13: // dc3
+ //case 0x01: // soh
+ //case 0x09: // ht
+ //case 0x0b: // vt
+ //case 0x0e: // so
+ //case 0x0f: // si
+ //case 0x10: // dle
+ //case 0x11: // dc1
+ //case 0x13: // dc3
#ifdef BB_FEATURE_VI_CRASHME
case 0x14: // dc4 ctrl-T
crashme = (crashme == 0) ? 1 : 0;
break;
#endif /* BB_FEATURE_VI_CRASHME */
- //case 0x16: // syn
- //case 0x17: // etb
- //case 0x18: // can
- //case 0x1c: // fs
- //case 0x1d: // gs
- //case 0x1e: // rs
- //case 0x1f: // us
- //case '!': // !-
- //case '#': // #-
- //case '&': // &-
- //case '(': // (-
- //case ')': // )-
- //case '*': // *-
- //case ',': // ,-
- //case '=': // =-
- //case '@': // @-
- //case 'F': // F-
- //case 'K': // K-
- //case 'Q': // Q-
- //case 'S': // S-
- //case 'T': // T-
- //case 'V': // V-
- //case '[': // [-
- //case '\\': // \-
- //case ']': // ]-
- //case '_': // _-
- //case '`': // `-
- //case 'g': // g-
- //case 't': // t-
+ //case 0x16: // syn
+ //case 0x17: // etb
+ //case 0x18: // can
+ //case 0x1c: // fs
+ //case 0x1d: // gs
+ //case 0x1e: // rs
+ //case 0x1f: // us
+ //case '!': // !-
+ //case '#': // #-
+ //case '&': // &-
+ //case '(': // (-
+ //case ')': // )-
+ //case '*': // *-
+ //case ',': // ,-
+ //case '=': // =-
+ //case '@': // @-
+ //case 'F': // F-
+ //case 'K': // K-
+ //case 'Q': // Q-
+ //case 'S': // S-
+ //case 'T': // T-
+ //case 'V': // V-
+ //case '[': // [-
+ //case '\\': // \-
+ //case ']': // ]-
+ //case '_': // _-
+ //case '`': // `-
+ //case 'g': // g-
//case 'u': // u- FIXME- there is no undo
- //case 'v': // v-
+ //case 'v': // v-
default: // unrecognised command
buf[0] = c;
buf[1] = '\0';
break;
case 12: // ctrl-L force redraw whole screen
case 18: // ctrl-R force redraw
- place_cursor(0, 0); // put cursor in correct place
+ place_cursor(0, 0, FALSE); // put cursor in correct place
clear_to_eos(); // tel terminal to erase display
(void) mysleep(10);
screen_erase(); // erase the internal screen buffer
case 25: // ctrl-Y scroll up one line
dot_scroll(1, -1);
break;
- case 0x1b: // esc
+ case 27: // esc
if (cmd_mode == 0)
indicate_error(c);
cmd_mode = 0; // stop insrting
//**** fall thru to ... 'i'
case ';': // ;- look at rest of line for last forward char
if (cmdcnt-- > 1) {
- do_cmd(c);
+ do_cmd(';');
} // repeat cnt
+ if (last_forward_char == 0) break;
q = dot + 1;
while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
q++;
}
break;
case ':': // :- the colon mode commands
-#ifdef BB_FEATURE_VI_COLON
p = get_input_line((Byte *) ":"); // get input line- use "status line"
+#ifdef BB_FEATURE_VI_COLON
colon(p); // execute the command
#else /* BB_FEATURE_VI_COLON */
- *status_buffer = '\0'; // clear the status buffer
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
- clear_to_eol(); // clear the line
- write(1, ":", 1); // write out the : prompt
- for (cnt = 0; cnt < 8; cnt++) {
- c1 = get_one_char();
- if (c1 == '\n' || c1 == '\r' || c1 == 27) {
- break;
- }
- buf[cnt] = c1;
- buf[cnt + 1] = '\0';
- write(1, buf + cnt, 1); // echo the char
- }
- cnt = strlen((char *) buf);
- if (strncasecmp((char *) buf, "quit", cnt) == 0 ||
- strncasecmp((char *) buf, "q!", cnt) == 0) { // delete lines
- if (file_modified == TRUE && buf[1] != '!') {
+ if (*p == ':')
+ p++; // move past the ':'
+ cnt = strlen((char *) p);
+ if (cnt <= 0)
+ break;
+ if (strncasecmp((char *) p, "quit", cnt) == 0 ||
+ strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
+ if (file_modified == TRUE && p[1] != '!') {
psbs("No write since last change (:quit! overrides)");
} else {
editing = 0;
}
- } else if (strncasecmp((char *) buf, "write", cnt) == 0 ||
- strncasecmp((char *) buf, "wq", cnt) == 0) {
+ } else if (strncasecmp((char *) p, "write", cnt) == 0 ||
+ strncasecmp((char *) p, "wq", cnt) == 0) {
cnt = file_write(cfn, text, end - 1);
file_modified = FALSE;
psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt);
- if (buf[1] == 'q') {
+ if (p[1] == 'q') {
editing = 0;
}
+ } else if (strncasecmp((char *) p, "file", cnt) == 0 ) {
+ edit_status(); // show current file status
+ } else if (sscanf((char *) p, "%d", &j) > 0) {
+ dot = find_line(j); // go to line # j
+ dot_skip_over_ws();
} else { // unrecognised cmd
- ni((Byte *) buf);
+ ni((Byte *) p);
}
#endif /* BB_FEATURE_VI_COLON */
break;
end_cmd_q(); // stop adding to q
#endif /* BB_FEATURE_VI_DOT_CMD */
break;
- case 'G': // G- goto to a line number (default= E-O-F)
- dot = end - 1; // assume E-O-F
+ case 'G': // G- goto to a line number (default= E-O-F)
+ dot = end - 1; // assume E-O-F
if (cmdcnt > 0) {
- dot = find_line(cmdcnt); // what line is #cmdcnt
+ dot = find_line(cmdcnt); // what line is #cmdcnt
}
dot_skip_over_ws();
break;
dot_begin();
dot_skip_over_ws();
break;
- case 'M': // M- goto middle line on screen
+ case 'M': // M- goto middle line on screen
dot = screenbegin;
for (cnt = 0; cnt < (rows-1) / 2; cnt++)
dot = next_line(dot);
break;
case 'O': // O- open a empty line above
- // 0i\n\033-i
+ // 0i\n ESC -i
p = begin_line(dot);
if (p[-1] == '\n') {
dot_prev();
dot = char_insert(dot, '\n');
} else {
dot_begin(); // 0
- dot = char_insert(dot, '\n'); // i\n\033
+ dot = char_insert(dot, '\n'); // i\n ESC
dot_prev(); // -
}
goto dc_i;
}
if (file_modified == TRUE
#ifdef BB_FEATURE_VI_READONLY
+ && vi_readonly == FALSE
&& readonly == FALSE
#endif /* BB_FEATURE_VI_READONLY */
) {
}
}
dot = yank_delete(p, q, 0, yf); // delete word
- } else if (strchr("^0bBeE$", c1)) {
+ } else if (strchr("^0bBeEft$", c1)) {
// single line copy text into a register and delete
dot = yank_delete(p, q, 0, yf); // delete word
} else if (strchr("cdykjHL%+-{}\r\n", c1)) {
}
end_cmd_q(); // stop adding to q
break;
+ case 't': // t- move to char prior to next x
+ last_forward_char = get_one_char();
+ do_cmd(';');
+ if (*dot == last_forward_char)
+ dot_left();
+ last_forward_char= 0;
+ break;
case 'w': // w- forward a word
if (cmdcnt-- > 1) {
do_cmd(c);
int useforce, forced;
struct stat st_buf;
- // :3154 // if (-e line 3154) goto it else stay put
- // :4,33w! foo // write a portion of buffer to file "foo"
- // :w // write all of buffer to current file
- // :q // quit
- // :q! // quit- dont care about modified file
+ // :3154 // if (-e line 3154) goto it else stay put
+ // :4,33w! foo // write a portion of buffer to file "foo"
+ // :w // write all of buffer to current file
+ // :q // quit
+ // :q! // quit- dont care about modified file
// :'a,'z!sort -u // filter block through sort
- // :'f // goto mark "f"
- // :'fl // list literal the mark "f" line
- // :.r bar // read file "bar" into buffer before dot
+ // :'f // goto mark "f"
+ // :'fl // list literal the mark "f" line
+ // :.r bar // read file "bar" into buffer before dot
// :/123/,/abc/d // delete lines from "123" line to "abc" line
- // :/xyz/ // goto the "xyz" line
+ // :/xyz/ // goto the "xyz" line
// :s/find/replace/ // substitute pattern "find" with "replace"
- // :!<cmd> // run <cmd> then return
+ // :!<cmd> // run <cmd> then return
//
if (strlen((char *) buf) <= 0)
goto vc1;
r = end - 1;
li = count_lines(text, end - 1);
fn = cfn; // default to current file
- memset(cmd, '\0', BUFSIZ); // clear cmd[]
- memset(args, '\0', BUFSIZ); // clear args[]
+ memset(cmd, '\0', BUFSIZ); // clear cmd[]
+ memset(args, '\0', BUFSIZ); // clear args[]
// look for optional address(es) :. :1 :1,9 :'q,'a :%
buf = get_address(buf, &b, &e);
while (isblnk(*buf))
buf++;
strcpy((char *) args, (char *) buf);
- if (last_char_is((char *)cmd,'!')) {
+ if (last_char_is((char *)cmd, '!')) {
useforce = TRUE;
cmd[strlen((char *) cmd) - 1] = '\0'; // get rid of !
}
} else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
// :!ls run the <cmd>
(void) alarm(0); // wait for input- no alarms
- place_cursor(rows - 1, 0); // go to Status line
+ place_cursor(rows - 1, 0, FALSE); // go to Status line
clear_to_eol(); // clear the line
cookmode();
system(orig_buf+1); // run the cmd
#endif /* BB_FEATURE_VI_YANKMARK */
// how many lines in text[]?
li = count_lines(text, end - 1);
- psb("\"%s\"%s"
+ psb("\"%s\"%s"
#ifdef BB_FEATURE_VI_READONLY
"%s"
#endif /* BB_FEATURE_VI_READONLY */
" %dL, %dC", cfn,
(sr < 0 ? " [New file]" : ""),
#ifdef BB_FEATURE_VI_READONLY
- (readonly == TRUE ? " [Read only]" : ""),
+ ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
#endif /* BB_FEATURE_VI_READONLY */
li, ch);
} else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
}
} else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available
// print out values of all features
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
cookmode();
show_help();
q = begin_line(dot); // assume .,. for the range
r = end_line(dot);
}
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
write(1, "\r\n", 2);
for (; q <= r; q++) {
goto vc1; // nothing was inserted
// how many lines in text[]?
li = count_lines(q, q + ch - 1);
- psb("\"%s\""
+ psb("\"%s\""
#ifdef BB_FEATURE_VI_READONLY
"%s"
#endif /* BB_FEATURE_VI_READONLY */
" %dL, %dC", fn,
#ifdef BB_FEATURE_VI_READONLY
- (readonly == TRUE ? " [Read only]" : ""),
+ ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
#endif /* BB_FEATURE_VI_READONLY */
li, ch);
if (ch > 0) {
i = 0; // offset into args
if (strlen((char *) args) == 0) {
// print out values of all options
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
printf("----------------------------------------\r\n");
#ifdef BB_FEATURE_VI_SETOPTS
if (!autoindent)
printf("no");
printf("autoindent ");
+ if (!err_method)
+ printf("no");
+ printf("flash ");
if (!ignorecase)
printf("no");
printf("ignorecase ");
strncasecmp((char *) args + i, "ai", 2) == 0) {
autoindent = (i == 2) ? 0 : 1;
}
+ if (strncasecmp((char *) args + i, "flash", 5) == 0 ||
+ strncasecmp((char *) args + i, "fl", 2) == 0) {
+ err_method = (i == 2) ? 0 : 1;
+ }
if (strncasecmp((char *) args + i, "ignorecase", 10) == 0 ||
strncasecmp((char *) args + i, "ic", 2) == 0) {
ignorecase = (i == 2) ? 0 : 1;
fn = args;
}
#ifdef BB_FEATURE_VI_READONLY
- if (readonly == TRUE && useforce == FALSE) {
+ if ((vi_readonly == TRUE || readonly == TRUE) && useforce == FALSE) {
psbs("\"%s\" File is read only", fn);
goto vc3;
}
static Byte *new_screen(int ro, int co)
{
+ int li;
+
if (screen != 0)
free(screen);
screensize = ro * co + 8;
screen = (Byte *) malloc(screensize);
+ // initialize the new screen. assume this will be a empty file.
+ screen_erase();
+ // non-existant text[] lines start with a tilde (~).
+ for (li = 1; li < ro - 1; li++) {
+ screen[(li * co) + 0] = '~';
+ }
return (screen);
}
}
text = (Byte *) malloc(size + 8);
memset(text, '\0', size); // clear new text[]
- //text += 4; // leave some room for "oops"
+ //text += 4; // leave some room for "oops"
textend = text + size - 1;
- //textend -= 4; // leave some root for "oops"
+ //textend -= 4; // leave some root for "oops"
return (text);
}
cmd_mode = 0;
cmdcnt = 0;
end_cmd_q(); // stop adding to q
- *status_buffer = '\0'; // clear the status buffer
+ strcpy((char *) status_buffer, " "); // clear the status buffer
if (p[-1] != '\n') {
p--;
}
q = next_line(q);
}
q = end_line(q);
- } else if (strchr("^%$0bBeE", c)) {
+ } else if (strchr("^%$0bBeEft", c)) {
// These cmds operate on char positions
do_cmd(c); // execute movement cmd
q = dot;
printf("\tNamed buffers with \"x\n");
#endif /* BB_FEATURE_VI_YANKMARK */
#ifdef BB_FEATURE_VI_READONLY
+ printf("\tReadonly if vi is called as \"view\"\n");
printf("\tReadonly with -R command line arg\n");
#endif /* BB_FEATURE_VI_READONLY */
#ifdef BB_FEATURE_VI_SET
term_vi = term_orig;
term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
term_vi.c_iflag &= (~IXON & ~ICRNL);
+ term_vi.c_oflag &= (~ONLCR);
term_vi.c_cc[VMIN] = 1;
term_vi.c_cc[VTIME] = 0;
erase_char = term_vi.c_cc[VERASE];
//----- Come here when we get a Suspend signal -------------------
static void suspend_sig(int sig)
{
- place_cursor(rows, 0); // go to bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
clear_to_eol(); // Erase to end of line
cookmode(); // terminal to "cooked"
kill(getpid(), SIGTSTP);
}
-//----- Come here when we get a signal --------------------
+//----- Come here when we get a signal ---------------------------
static void catch_sig(int sig)
{
signal(SIGHUP, catch_sig);
return (c); // return the char, where ever it came from
}
-#if defined(BB_FEATURE_VI_SEARCH) || defined(BB_FEATURE_VI_COLON)
static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
{
Byte buf[BUFSIZ];
strcpy((char *) buf, (char *) prompt);
*status_buffer = '\0'; // clear the status buffer
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
write(1, prompt, strlen((char *) prompt)); // write out the :, /, or ? prompt
obufp = (Byte *) strdup((char *) buf);
return (obufp);
}
-#endif /* BB_FEATURE_VI_SEARCH || BB_FEATURE_VI_COLON */
static int file_size(Byte * fn) // what is the byte size of "fn"
{
}
// see if we can open the file
+#ifdef BB_FEATURE_VI_READONLY
+ if (vi_readonly == TRUE) goto fi1; // do not try write-mode
+#endif
fd = open((char *) fn, O_RDWR); // assume read & write
if (fd < 0) {
// could not open for writing- maybe file is read only
+#ifdef BB_FEATURE_VI_READONLY
+ fi1:
+#endif
fd = open((char *) fn, O_RDONLY); // try read-only
if (fd < 0) {
psbs("\"%s\" %s", fn, "could not open file");
// 1,0 ... 1,79
// . ... .
// . ... .
-// 22,0 ... 22,79
-// 23,0 ... 23,79 status line
+// 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)
+static void place_cursor(int row, int col, int opti)
{
- Byte buf[30];
+ char cm1[BUFSIZ];
+ char *cm;
int l;
-
- if (row < 0)
- row = 0;
- if (row >= rows)
- row = rows - 1;
- if (col < 0)
- col = 0;
- if (col >= columns)
- col = columns - 1;
- sprintf((char *) buf, "%c[%d;%dH", 0x1b, row + 1, col + 1);
- l = strlen((char *) buf);
- write(1, buf, l);
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ char cm2[BUFSIZ];
+ Byte *screenp;
+ // char cm3[BUFSIZ];
+ int Rrow= last_row;
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+
+ memset(cm1, '\0', BUFSIZ - 1); // clear the buffer
+
+ if (row < 0) row = 0;
+ if (row >= rows) row = rows - 1;
+ if (col < 0) col = 0;
+ if (col >= columns) col = columns - 1;
+
+ //----- 1. Try the standard terminal ESC sequence
+ sprintf((char *) cm1, CMrc, row + 1, col + 1);
+ cm= cm1;
+ if (opti == FALSE) goto pc0;
+
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ //----- find the minimum # of chars to move cursor -------------
+ //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
+ memset(cm2, '\0', BUFSIZ - 1); // clear the buffer
+
+ // move to the correct row
+ while (row < Rrow) {
+ // the cursor has to move up
+ strcat(cm2, CMup);
+ Rrow--;
+ }
+ while (row > Rrow) {
+ // the cursor has to move down
+ strcat(cm2, CMdown);
+ Rrow++;
+ }
+
+ // now move to the correct column
+ strcat(cm2, "\r"); // start at col 0
+ // just send out orignal source char to get to correct place
+ screenp = &screen[row * columns]; // start of screen line
+ strncat(cm2, screenp, col);
+
+ //----- 3. Try some other way of moving cursor
+ //---------------------------------------------
+
+ // pick the shortest cursor motion to send out
+ cm= cm1;
+ if (strlen(cm2) < strlen(cm)) {
+ cm= cm2;
+ } /* else if (strlen(cm3) < strlen(cm)) {
+ cm= cm3;
+ } */
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+ pc0:
+ l= strlen(cm);
+ if (l) write(1, cm, l); // move the cursor
}
//----- Erase from cursor to end of line -----------------------
static void clear_to_eol()
{
- write(1, "\033[0K", 4); // Erase from cursor to end of line
+ write(1, Ceol, strlen(Ceol)); // Erase from cursor to end of line
}
//----- Erase from cursor to end of screen -----------------------
static void clear_to_eos()
{
- write(1, "\033[0J", 4); // Erase from cursor to end of screen
+ write(1, Ceos, strlen(Ceos)); // Erase from cursor to end of screen
}
//----- Start standout mode ------------------------------------
static void standout_start() // send "start reverse video" sequence
{
- write(1, "\033[7m", 4); // Start reverse video mode
+ write(1, SOs, strlen(SOs)); // Start reverse video mode
}
//----- End standout mode --------------------------------------
static void standout_end() // send "end reverse video" sequence
{
- write(1, "\033[0m", 4); // End reverse video mode
+ write(1, SOn, strlen(SOn)); // End reverse video mode
}
//----- Flash the screen --------------------------------------
static void beep()
{
- write(1, "\007", 1); // send out a bell character
+ write(1, bell, strlen(bell)); // send out a bell character
}
static void indicate_error(char c)
//----- Erase the Screen[] memory ------------------------------
static void screen_erase()
{
- int i;
-
- for (i = 0; i < screensize; i++) {
- screen[i] = '\0';
- }
+ memset(screen, ' ', screensize); // clear new screen
}
//----- Draw the status line at bottom of the screen -------------
static void show_status_line(void)
{
- int cnt;
+ static int last_cksum;
+ int l, cnt, cksum;
cnt = strlen((char *) status_buffer);
- place_cursor(rows - 1, 0); // put cursor on status line
- if (cnt > 0) {
+ 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
+ place_cursor(rows - 1, 0, FALSE); // put cursor on status line
write(1, status_buffer, cnt);
+ clear_to_eol();
+ place_cursor(crow, ccol, FALSE); // put cursor back in correct place
}
- clear_to_eol();
- place_cursor(crow, ccol); // put cursor back in correct place
}
//----- format the status buffer, the bottom line of screen ------
va_list args;
va_start(args, format);
- strcpy((char *) status_buffer, "\033[7m"); // Terminal standout mode on
+ strcpy((char *) status_buffer, SOs); // Terminal standout mode on
vsprintf((char *) status_buffer + strlen((char *) status_buffer), format,
args);
- strcat((char *) status_buffer, "\033[0m"); // Terminal standout mode off
+ strcat((char *) status_buffer, SOn); // Terminal standout mode off
va_end(args);
return;
"%s line %d of %d --%d%%--",
(cfn != 0 ? (char *) cfn : "No file"),
#ifdef BB_FEATURE_VI_READONLY
- (readonly == TRUE ? " [Read only]" : ""),
+ ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
#endif /* BB_FEATURE_VI_READONLY */
(file_modified == TRUE ? " [modified]" : ""),
cur, tot, percent);
//----- Force refresh of all Lines -----------------------------
static void redraw(int full_screen)
{
- place_cursor(0, 0); // put cursor in correct place
+ 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
refresh(full_screen); // this will redraw the entire display
}
+//----- Format a text[] line into a buffer ---------------------
+static void format_line(Byte *dest, Byte *src, int li)
+{
+ int co;
+ Byte c;
+
+ for (co= 0; co < MAX_SCR_COLS; co++) {
+ c= ' '; // assume blank
+ if (li > 0 && co == 0) {
+ c = '~'; // not first line, assume Tilde
+ }
+ // are there chars in text[] and have we gone past the end
+ if (text < end && src < end) {
+ c = *src++;
+ }
+ if (c == '\n')
+ break;
+ if (c < ' ' || c > '~') {
+ if (c == '\t') {
+ c = ' ';
+ // co % 8 != 7
+ for (; (co % tabstop) != (tabstop - 1); co++) {
+ dest[co] = c;
+ }
+ } else {
+ dest[co++] = '^';
+ c |= '@'; // make it visible
+ c &= 0x7f; // get rid of hi bit
+ }
+ }
+ // the co++ is done here so that the column will
+ // not be overwritten when we blank-out the rest of line
+ dest[co] = c;
+ if (src >= end)
+ break;
+ }
+}
+
//----- Refresh the changed screen lines -----------------------
// Copy the source line from text[] into the buffer and note
// if the current screenline is different from the new buffer.
static void refresh(int full_screen)
{
static int old_offset;
- int li, co, changed;
- Byte c, buf[MAX_SCR_COLS];
+ int li, changed;
+ Byte buf[MAX_SCR_COLS];
Byte *tp, *sp; // pointer into text[] and screen[]
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ int last_li= -2; // last line that changed- for optimizing cursor movement
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
#ifdef BB_FEATURE_VI_WIN_RESIZE
window_size_get(0);
#endif /* BB_FEATURE_VI_WIN_RESIZE */
- sync_cursor(dot, &crow, &ccol);
+ sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
tp = screenbegin; // index into text[] of top line
+
// compare text[] to screen[] and mark screen[] lines that need updating
for (li = 0; li < rows - 1; li++) {
- // format current text line into buf with "columns" wide
- for (co = 0; co < columns + offset;) {
- c = ' '; // assume blank
- if (li > 0 && co == 0) {
- c = '~'; // not first line, assume Tilde
- }
- // are there chars in text[]
- // and have we gone past the end
- if (text < end && tp < end) {
- c = *tp++;
- }
- if (c == '\n')
+ int cs, ce; // column start & end
+ memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
+ buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
+ // format current text line into buf
+ format_line(buf, tp, li);
+
+ // skip to the end of the current text[] line
+ while (tp < end && *tp++ != '\n') /*no-op*/ ;
+
+ // see if there are any changes between vitual screen and buf
+ changed = FALSE; // assume no change
+ cs= 0;
+ ce= columns-1;
+ sp = &screen[li * columns]; // start of screen line
+ if (full_screen == TRUE) {
+ // force re-draw of every single column from 0 - columns-1
+ goto re0;
+ }
+ // compare newly formatted buffer with virtual screen
+ // look forward for first difference between buf and screen
+ for ( ; cs <= ce; cs++) {
+ if (buf[cs + offset] != sp[cs]) {
+ changed = TRUE; // mark for redraw
break;
- if (c < ' ' || c > '~') {
- if (c == '\t') {
- c = ' ';
- // co % 8 != 7
- for (; (co % tabstop) != (tabstop - 1); co++) {
- buf[co] = c;
- }
- } else {
- buf[co++] = '^';
- c |= '@'; // make it visible
- c &= 0x7f; // get rid of hi bit
- }
}
- // the co++ is done here so that the column will
- // not be overwritten when we blank-out the rest of line
- buf[co++] = c;
- if (tp >= end)
- break;
- }
- if (co >= columns + offset) {
- // skip to the end of the current text[] line
- while (tp < end && *tp++ != '\n');
}
- // try to keep the cursor near it's current position
- // remember how many chars in this row- where the cursor sits
- // blank out the rest of the buffer
- while (co < MAX_SCR_COLS - 1) {
- buf[co++] = ' ';
- }
- buf[co++] = 0; // NULL terminate the buffer
- // if necessary, update virtual screen[] and terminal from buf[]
- changed = FALSE; // assume no change
- sp = &screen[li * columns]; // start of screen line
- for (co = 0; co < columns; co++) {
- if (sp[co] != buf[co + offset]) {
- sp[co] = buf[co + offset];
+ // look backward for last difference between buf and screen
+ for ( ; ce >= cs; ce--) {
+ if (buf[ce + offset] != sp[ce]) {
changed = TRUE; // mark for redraw
+ break;
}
}
+ // now, cs is index of first diff, and ce is index of last diff
+
// if horz offset has changed, force a redraw
- if (offset != old_offset)
+ if (offset != old_offset) {
+ re0:
changed = TRUE;
+ }
- // write all marked screen lines out to terminal
+ // make a sanity check of columns indexes
+ if (cs < 0) cs= 0;
+ if (ce > columns-1) ce= columns-1;
+ if (cs > ce) { cs= 0; ce= columns-1; }
+ // is there a change between vitual screen and buf
if (changed == TRUE) {
- place_cursor(li, 0); // put cursor in correct place
- clear_to_eol(); // Erase to end of line
- if (full_screen == FALSE) {
- // don't redraw every column on terminal
- // look backwards for last non-blank
- for (co = columns + offset; co >= 0; co--) {
- // break;
- if (buf[co] != ' ')
- break;
- }
- co++;
+ // copy changed part of buffer to virtual screen
+ memmove(sp+cs, buf+(cs+offset), ce-cs+1);
+
+ // move cursor to column of first change
+ if (offset != old_offset) {
+ // opti_cur_move is still too stupid
+ // to handle offsets correctly
+ place_cursor(li, cs, FALSE);
} else {
- // redraw every column on terminal
- co = columns;
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ // if this just the next line
+ // try to optimize cursor movement
+ // otherwise, use standard ESC sequence
+ place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
+ last_li= li;
+#else /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+ place_cursor(li, cs, FALSE); // use standard ESC sequence
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
}
+
// write line out to terminal
- write(1, buf + offset, co);
+ write(1, sp+cs, ce-cs+1);
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ last_row = li;
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
}
}
- place_cursor(crow, ccol);
+ place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ last_row = crow;
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+
if (offset != old_offset)
old_offset = offset;
}
*/
char *vi_Version =
- "$Id: vi.c,v 1.5 2001/04/26 15:56:47 andersen Exp $";
+ "$Id: vi.c,v 1.6 2001/05/07 17:37:43 andersen Exp $";
/*
* To compile for standalone use:
* gcc -Wall -Os -s -DSTANDALONE -o vi vi.c
* or
- * gcc -Wall -Os -s -DSTANDALONE -DCRASHME -o vi vi.c # include testing features
+ * gcc -Wall -Os -s -DSTANDALONE -DBB_FEATURE_VI_CRASHME -o vi vi.c # include testing features
* strip vi
*/
//---- Feature -------------- Bytes to immplement
#ifdef STANDALONE
-#define vi_main main
+#define vi_main main
#define BB_FEATURE_VI_COLON // 4288
#define BB_FEATURE_VI_YANKMARK // 1408
#define BB_FEATURE_VI_SEARCH // 1088
// To stop testing, wait until all to text[] is deleted, or
// Ctrl-Z and kill -9 %1
// while in the editor Ctrl-T will toggle the crashme function on and off.
-//#define BB_FEATURE_VI_CRASHME // randomly pick commands to execute
+//#define BB_FEATURE_VI_CRASHME // randomly pick commands to execute
#endif /* STANDALONE */
#ifndef STANDALONE
static char erase_char; // the users erase character
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 char *SOs, *SOn;
+static char *SOs, *SOn; // terminal standout start/normal ESC sequence
+static char *bell; // terminal bell sequence
+static char *Ceol, *Ceos; // Clear-end-of-line and Clear-end-of-screen ESC sequence
+static char *CMrc; // Cursor motion arbitrary destination ESC sequence
+static char *CMup, *CMdown; // Cursor motion up and down ESC sequence
static Byte *status_buffer; // mesages to the user
static Byte last_input_char; // last char read from user
static Byte last_forward_char; // last char searched for with 'f'
static int tabstop;
static struct termios term_orig, term_vi; // remember what the cooked mode was
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+static int last_row; // where the cursor was last moved to
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
#ifdef BB_FEATURE_VI_USE_SIGNALS
static jmp_buf restart; // catch_sig()
#endif /* BB_FEATURE_VI_USE_SIGNALS */
static Byte *modifying_cmds; // cmds that modify text[]
#endif /* BB_FEATURE_VI_DOT_CMD || BB_FEATURE_VI_YANKMARK */
#ifdef BB_FEATURE_VI_READONLY
-static int readonly;
+static int vi_readonly, readonly;
#endif /* BB_FEATURE_VI_READONLY */
#ifdef BB_FEATURE_VI_SETOPTS
static int autoindent;
static int file_size(Byte *); // what is the byte size of "fn"
static int file_insert(Byte *, Byte *, int);
static int file_write(Byte *, Byte *, Byte *);
-static void place_cursor(int, int);
+static void place_cursor(int, int, int);
static void screen_erase();
static void clear_to_eol(void);
static void clear_to_eos(void);
static void ni(Byte *); // display messages
static void edit_status(void); // show 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[]
#ifdef BB_FEATURE_VI_SEARCH
static Byte *get_address(Byte *, int *, int *); // get two colon addrs, if present
static void colon(Byte *); // execute the "colon" mode cmds
#endif /* BB_FEATURE_VI_COLON */
-#if defined(BB_FEATURE_VI_SEARCH) || defined(BB_FEATURE_VI_COLON)
static Byte *get_input_line(Byte *); // get input line- use "status line"
-#endif /* BB_FEATURE_VI_SEARCH || BB_FEATURE_VI_COLON */
#ifdef BB_FEATURE_VI_USE_SIGNALS
static void winch_sig(int); // catch window size changes
static void suspend_sig(int); // catch ctrl-Z
int i;
#endif /* BB_FEATURE_VI_YANKMARK */
+ CMrc= "\033[%d;%dH"; // Terminal Crusor motion ESC sequence
+ CMup= "\033[A"; // move cursor up one line, same col
+ CMdown="\n"; // move cursor down one line, same col
+ Ceol= "\033[0K"; // Clear from cursor to end of line
+ Ceos= "\033[0J"; // Clear from cursor to end of screen
SOs = "\033[7m"; // Terminal standout mode on
SOn = "\033[0m"; // Terminal standout mode off
+ bell= "\007"; // Terminal bell sequence
#ifdef BB_FEATURE_VI_CRASHME
(void) srand((long) getpid());
#endif /* BB_FEATURE_VI_CRASHME */
status_buffer = (Byte *) malloc(200); // hold messages to user
#ifdef BB_FEATURE_VI_READONLY
- readonly = FALSE;
+ vi_readonly = readonly = FALSE;
if (strncmp(argv[0], "view", 4) == 0) {
readonly = TRUE;
+ vi_readonly = TRUE;
}
#endif /* BB_FEATURE_VI_READONLY */
#ifdef BB_FEATURE_VI_SETOPTS
readonly = TRUE;
break;
#endif /* BB_FEATURE_VI_READONLY */
- //case 'r': // recover flag- ignore- we don't use tmp file
- //case 'x': // encryption flag- ignore
- //case 'c': // execute command first
- //case 'h': // help -- just use default
+ //case 'r': // recover flag- ignore- we don't use tmp file
+ //case 'x': // encryption flag- ignore
+ //case 'c': // execute command first
+ //case 'h': // help -- just use default
default:
show_help();
break;
rawmode();
rows = 24;
columns = 80;
+ ch= -1;
#ifdef BB_FEATURE_VI_WIN_RESIZE
window_size_get(0);
#endif /* BB_FEATURE_VI_WIN_RESIZE */
new_screen(rows, columns); // get memory for virtual screen
- ch= 0;
cnt = file_size(fn); // file size
size = 2 * cnt; // 200% of file size
new_text(size); // get a text[] buffer
ioq = ioq_start = last_modifying_cmd = 0;
adding2q = 0;
#endif /* BB_FEATURE_VI_DOT_CMD */
- redraw(TRUE);
+ redraw(FALSE); // dont force every col re-draw
show_status_line();
//------This is the main Vi cmd handling loop -----------------------
}
//-------------------------------------------------------------------
- place_cursor(rows, 0); // go to bottom of screen
+ place_cursor(rows, 0, FALSE); // go to bottom of screen
clear_to_eol(); // Erase to end of line
cookmode();
}
i = (int) lrand48() % strlen(cmd);
cm = cmd[i];
if (strchr(":\024", cm))
- goto cd0; // dont allow these commands
+ goto cd0; // dont allow colon or ctrl-T commands
readbuffer[rbi++] = cm; // put cmd into input buffer
// now we have the command-
if (strlen(msg) > 0) {
alarm(0);
- sprintf(buf, "\n\n%d: \'%c\' ", totalcmds, last_input_char);
+ sprintf(buf, "\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
+ totalcmds, last_input_char, msg, SOs, SOn);
write(1, buf, strlen(buf));
- write(1, msg, strlen(msg));
- write(1, "\n\n\n", 3);
- write(1, "\033[7m[Hit return to continue]\033[0m", 32);
while (read(0, d, 1) > 0) {
if (d[0] == '\n' || d[0] == '\r')
break;
}
switch (c) {
- //case 0x01: // soh
- //case 0x09: // ht
- //case 0x0b: // vt
- //case 0x0e: // so
- //case 0x0f: // si
- //case 0x10: // dle
- //case 0x11: // dc1
- //case 0x13: // dc3
+ //case 0x01: // soh
+ //case 0x09: // ht
+ //case 0x0b: // vt
+ //case 0x0e: // so
+ //case 0x0f: // si
+ //case 0x10: // dle
+ //case 0x11: // dc1
+ //case 0x13: // dc3
#ifdef BB_FEATURE_VI_CRASHME
case 0x14: // dc4 ctrl-T
crashme = (crashme == 0) ? 1 : 0;
break;
#endif /* BB_FEATURE_VI_CRASHME */
- //case 0x16: // syn
- //case 0x17: // etb
- //case 0x18: // can
- //case 0x1c: // fs
- //case 0x1d: // gs
- //case 0x1e: // rs
- //case 0x1f: // us
- //case '!': // !-
- //case '#': // #-
- //case '&': // &-
- //case '(': // (-
- //case ')': // )-
- //case '*': // *-
- //case ',': // ,-
- //case '=': // =-
- //case '@': // @-
- //case 'F': // F-
- //case 'K': // K-
- //case 'Q': // Q-
- //case 'S': // S-
- //case 'T': // T-
- //case 'V': // V-
- //case '[': // [-
- //case '\\': // \-
- //case ']': // ]-
- //case '_': // _-
- //case '`': // `-
- //case 'g': // g-
- //case 't': // t-
+ //case 0x16: // syn
+ //case 0x17: // etb
+ //case 0x18: // can
+ //case 0x1c: // fs
+ //case 0x1d: // gs
+ //case 0x1e: // rs
+ //case 0x1f: // us
+ //case '!': // !-
+ //case '#': // #-
+ //case '&': // &-
+ //case '(': // (-
+ //case ')': // )-
+ //case '*': // *-
+ //case ',': // ,-
+ //case '=': // =-
+ //case '@': // @-
+ //case 'F': // F-
+ //case 'K': // K-
+ //case 'Q': // Q-
+ //case 'S': // S-
+ //case 'T': // T-
+ //case 'V': // V-
+ //case '[': // [-
+ //case '\\': // \-
+ //case ']': // ]-
+ //case '_': // _-
+ //case '`': // `-
+ //case 'g': // g-
//case 'u': // u- FIXME- there is no undo
- //case 'v': // v-
+ //case 'v': // v-
default: // unrecognised command
buf[0] = c;
buf[1] = '\0';
break;
case 12: // ctrl-L force redraw whole screen
case 18: // ctrl-R force redraw
- place_cursor(0, 0); // put cursor in correct place
+ place_cursor(0, 0, FALSE); // put cursor in correct place
clear_to_eos(); // tel terminal to erase display
(void) mysleep(10);
screen_erase(); // erase the internal screen buffer
case 25: // ctrl-Y scroll up one line
dot_scroll(1, -1);
break;
- case 0x1b: // esc
+ case 27: // esc
if (cmd_mode == 0)
indicate_error(c);
cmd_mode = 0; // stop insrting
//**** fall thru to ... 'i'
case ';': // ;- look at rest of line for last forward char
if (cmdcnt-- > 1) {
- do_cmd(c);
+ do_cmd(';');
} // repeat cnt
+ if (last_forward_char == 0) break;
q = dot + 1;
while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
q++;
}
break;
case ':': // :- the colon mode commands
-#ifdef BB_FEATURE_VI_COLON
p = get_input_line((Byte *) ":"); // get input line- use "status line"
+#ifdef BB_FEATURE_VI_COLON
colon(p); // execute the command
#else /* BB_FEATURE_VI_COLON */
- *status_buffer = '\0'; // clear the status buffer
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
- clear_to_eol(); // clear the line
- write(1, ":", 1); // write out the : prompt
- for (cnt = 0; cnt < 8; cnt++) {
- c1 = get_one_char();
- if (c1 == '\n' || c1 == '\r' || c1 == 27) {
- break;
- }
- buf[cnt] = c1;
- buf[cnt + 1] = '\0';
- write(1, buf + cnt, 1); // echo the char
- }
- cnt = strlen((char *) buf);
- if (strncasecmp((char *) buf, "quit", cnt) == 0 ||
- strncasecmp((char *) buf, "q!", cnt) == 0) { // delete lines
- if (file_modified == TRUE && buf[1] != '!') {
+ if (*p == ':')
+ p++; // move past the ':'
+ cnt = strlen((char *) p);
+ if (cnt <= 0)
+ break;
+ if (strncasecmp((char *) p, "quit", cnt) == 0 ||
+ strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
+ if (file_modified == TRUE && p[1] != '!') {
psbs("No write since last change (:quit! overrides)");
} else {
editing = 0;
}
- } else if (strncasecmp((char *) buf, "write", cnt) == 0 ||
- strncasecmp((char *) buf, "wq", cnt) == 0) {
+ } else if (strncasecmp((char *) p, "write", cnt) == 0 ||
+ strncasecmp((char *) p, "wq", cnt) == 0) {
cnt = file_write(cfn, text, end - 1);
file_modified = FALSE;
psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt);
- if (buf[1] == 'q') {
+ if (p[1] == 'q') {
editing = 0;
}
+ } else if (strncasecmp((char *) p, "file", cnt) == 0 ) {
+ edit_status(); // show current file status
+ } else if (sscanf((char *) p, "%d", &j) > 0) {
+ dot = find_line(j); // go to line # j
+ dot_skip_over_ws();
} else { // unrecognised cmd
- ni((Byte *) buf);
+ ni((Byte *) p);
}
#endif /* BB_FEATURE_VI_COLON */
break;
end_cmd_q(); // stop adding to q
#endif /* BB_FEATURE_VI_DOT_CMD */
break;
- case 'G': // G- goto to a line number (default= E-O-F)
- dot = end - 1; // assume E-O-F
+ case 'G': // G- goto to a line number (default= E-O-F)
+ dot = end - 1; // assume E-O-F
if (cmdcnt > 0) {
- dot = find_line(cmdcnt); // what line is #cmdcnt
+ dot = find_line(cmdcnt); // what line is #cmdcnt
}
dot_skip_over_ws();
break;
dot_begin();
dot_skip_over_ws();
break;
- case 'M': // M- goto middle line on screen
+ case 'M': // M- goto middle line on screen
dot = screenbegin;
for (cnt = 0; cnt < (rows-1) / 2; cnt++)
dot = next_line(dot);
break;
case 'O': // O- open a empty line above
- // 0i\n\033-i
+ // 0i\n ESC -i
p = begin_line(dot);
if (p[-1] == '\n') {
dot_prev();
dot = char_insert(dot, '\n');
} else {
dot_begin(); // 0
- dot = char_insert(dot, '\n'); // i\n\033
+ dot = char_insert(dot, '\n'); // i\n ESC
dot_prev(); // -
}
goto dc_i;
}
if (file_modified == TRUE
#ifdef BB_FEATURE_VI_READONLY
+ && vi_readonly == FALSE
&& readonly == FALSE
#endif /* BB_FEATURE_VI_READONLY */
) {
}
}
dot = yank_delete(p, q, 0, yf); // delete word
- } else if (strchr("^0bBeE$", c1)) {
+ } else if (strchr("^0bBeEft$", c1)) {
// single line copy text into a register and delete
dot = yank_delete(p, q, 0, yf); // delete word
} else if (strchr("cdykjHL%+-{}\r\n", c1)) {
}
end_cmd_q(); // stop adding to q
break;
+ case 't': // t- move to char prior to next x
+ last_forward_char = get_one_char();
+ do_cmd(';');
+ if (*dot == last_forward_char)
+ dot_left();
+ last_forward_char= 0;
+ break;
case 'w': // w- forward a word
if (cmdcnt-- > 1) {
do_cmd(c);
int useforce, forced;
struct stat st_buf;
- // :3154 // if (-e line 3154) goto it else stay put
- // :4,33w! foo // write a portion of buffer to file "foo"
- // :w // write all of buffer to current file
- // :q // quit
- // :q! // quit- dont care about modified file
+ // :3154 // if (-e line 3154) goto it else stay put
+ // :4,33w! foo // write a portion of buffer to file "foo"
+ // :w // write all of buffer to current file
+ // :q // quit
+ // :q! // quit- dont care about modified file
// :'a,'z!sort -u // filter block through sort
- // :'f // goto mark "f"
- // :'fl // list literal the mark "f" line
- // :.r bar // read file "bar" into buffer before dot
+ // :'f // goto mark "f"
+ // :'fl // list literal the mark "f" line
+ // :.r bar // read file "bar" into buffer before dot
// :/123/,/abc/d // delete lines from "123" line to "abc" line
- // :/xyz/ // goto the "xyz" line
+ // :/xyz/ // goto the "xyz" line
// :s/find/replace/ // substitute pattern "find" with "replace"
- // :!<cmd> // run <cmd> then return
+ // :!<cmd> // run <cmd> then return
//
if (strlen((char *) buf) <= 0)
goto vc1;
r = end - 1;
li = count_lines(text, end - 1);
fn = cfn; // default to current file
- memset(cmd, '\0', BUFSIZ); // clear cmd[]
- memset(args, '\0', BUFSIZ); // clear args[]
+ memset(cmd, '\0', BUFSIZ); // clear cmd[]
+ memset(args, '\0', BUFSIZ); // clear args[]
// look for optional address(es) :. :1 :1,9 :'q,'a :%
buf = get_address(buf, &b, &e);
while (isblnk(*buf))
buf++;
strcpy((char *) args, (char *) buf);
- if (last_char_is((char *)cmd,'!')) {
+ if (last_char_is((char *)cmd, '!')) {
useforce = TRUE;
cmd[strlen((char *) cmd) - 1] = '\0'; // get rid of !
}
} else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
// :!ls run the <cmd>
(void) alarm(0); // wait for input- no alarms
- place_cursor(rows - 1, 0); // go to Status line
+ place_cursor(rows - 1, 0, FALSE); // go to Status line
clear_to_eol(); // clear the line
cookmode();
system(orig_buf+1); // run the cmd
#endif /* BB_FEATURE_VI_YANKMARK */
// how many lines in text[]?
li = count_lines(text, end - 1);
- psb("\"%s\"%s"
+ psb("\"%s\"%s"
#ifdef BB_FEATURE_VI_READONLY
"%s"
#endif /* BB_FEATURE_VI_READONLY */
" %dL, %dC", cfn,
(sr < 0 ? " [New file]" : ""),
#ifdef BB_FEATURE_VI_READONLY
- (readonly == TRUE ? " [Read only]" : ""),
+ ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
#endif /* BB_FEATURE_VI_READONLY */
li, ch);
} else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
}
} else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available
// print out values of all features
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
cookmode();
show_help();
q = begin_line(dot); // assume .,. for the range
r = end_line(dot);
}
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
write(1, "\r\n", 2);
for (; q <= r; q++) {
goto vc1; // nothing was inserted
// how many lines in text[]?
li = count_lines(q, q + ch - 1);
- psb("\"%s\""
+ psb("\"%s\""
#ifdef BB_FEATURE_VI_READONLY
"%s"
#endif /* BB_FEATURE_VI_READONLY */
" %dL, %dC", fn,
#ifdef BB_FEATURE_VI_READONLY
- (readonly == TRUE ? " [Read only]" : ""),
+ ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
#endif /* BB_FEATURE_VI_READONLY */
li, ch);
if (ch > 0) {
i = 0; // offset into args
if (strlen((char *) args) == 0) {
// print out values of all options
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
printf("----------------------------------------\r\n");
#ifdef BB_FEATURE_VI_SETOPTS
if (!autoindent)
printf("no");
printf("autoindent ");
+ if (!err_method)
+ printf("no");
+ printf("flash ");
if (!ignorecase)
printf("no");
printf("ignorecase ");
strncasecmp((char *) args + i, "ai", 2) == 0) {
autoindent = (i == 2) ? 0 : 1;
}
+ if (strncasecmp((char *) args + i, "flash", 5) == 0 ||
+ strncasecmp((char *) args + i, "fl", 2) == 0) {
+ err_method = (i == 2) ? 0 : 1;
+ }
if (strncasecmp((char *) args + i, "ignorecase", 10) == 0 ||
strncasecmp((char *) args + i, "ic", 2) == 0) {
ignorecase = (i == 2) ? 0 : 1;
fn = args;
}
#ifdef BB_FEATURE_VI_READONLY
- if (readonly == TRUE && useforce == FALSE) {
+ if ((vi_readonly == TRUE || readonly == TRUE) && useforce == FALSE) {
psbs("\"%s\" File is read only", fn);
goto vc3;
}
static Byte *new_screen(int ro, int co)
{
+ int li;
+
if (screen != 0)
free(screen);
screensize = ro * co + 8;
screen = (Byte *) malloc(screensize);
+ // initialize the new screen. assume this will be a empty file.
+ screen_erase();
+ // non-existant text[] lines start with a tilde (~).
+ for (li = 1; li < ro - 1; li++) {
+ screen[(li * co) + 0] = '~';
+ }
return (screen);
}
}
text = (Byte *) malloc(size + 8);
memset(text, '\0', size); // clear new text[]
- //text += 4; // leave some room for "oops"
+ //text += 4; // leave some room for "oops"
textend = text + size - 1;
- //textend -= 4; // leave some root for "oops"
+ //textend -= 4; // leave some root for "oops"
return (text);
}
cmd_mode = 0;
cmdcnt = 0;
end_cmd_q(); // stop adding to q
- *status_buffer = '\0'; // clear the status buffer
+ strcpy((char *) status_buffer, " "); // clear the status buffer
if (p[-1] != '\n') {
p--;
}
q = next_line(q);
}
q = end_line(q);
- } else if (strchr("^%$0bBeE", c)) {
+ } else if (strchr("^%$0bBeEft", c)) {
// These cmds operate on char positions
do_cmd(c); // execute movement cmd
q = dot;
printf("\tNamed buffers with \"x\n");
#endif /* BB_FEATURE_VI_YANKMARK */
#ifdef BB_FEATURE_VI_READONLY
+ printf("\tReadonly if vi is called as \"view\"\n");
printf("\tReadonly with -R command line arg\n");
#endif /* BB_FEATURE_VI_READONLY */
#ifdef BB_FEATURE_VI_SET
term_vi = term_orig;
term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
term_vi.c_iflag &= (~IXON & ~ICRNL);
+ term_vi.c_oflag &= (~ONLCR);
term_vi.c_cc[VMIN] = 1;
term_vi.c_cc[VTIME] = 0;
erase_char = term_vi.c_cc[VERASE];
//----- Come here when we get a Suspend signal -------------------
static void suspend_sig(int sig)
{
- place_cursor(rows, 0); // go to bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
clear_to_eol(); // Erase to end of line
cookmode(); // terminal to "cooked"
kill(getpid(), SIGTSTP);
}
-//----- Come here when we get a signal --------------------
+//----- Come here when we get a signal ---------------------------
static void catch_sig(int sig)
{
signal(SIGHUP, catch_sig);
return (c); // return the char, where ever it came from
}
-#if defined(BB_FEATURE_VI_SEARCH) || defined(BB_FEATURE_VI_COLON)
static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
{
Byte buf[BUFSIZ];
strcpy((char *) buf, (char *) prompt);
*status_buffer = '\0'; // clear the status buffer
- place_cursor(rows - 1, 0); // go to Status line, bottom of screen
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
clear_to_eol(); // clear the line
write(1, prompt, strlen((char *) prompt)); // write out the :, /, or ? prompt
obufp = (Byte *) strdup((char *) buf);
return (obufp);
}
-#endif /* BB_FEATURE_VI_SEARCH || BB_FEATURE_VI_COLON */
static int file_size(Byte * fn) // what is the byte size of "fn"
{
}
// see if we can open the file
+#ifdef BB_FEATURE_VI_READONLY
+ if (vi_readonly == TRUE) goto fi1; // do not try write-mode
+#endif
fd = open((char *) fn, O_RDWR); // assume read & write
if (fd < 0) {
// could not open for writing- maybe file is read only
+#ifdef BB_FEATURE_VI_READONLY
+ fi1:
+#endif
fd = open((char *) fn, O_RDONLY); // try read-only
if (fd < 0) {
psbs("\"%s\" %s", fn, "could not open file");
// 1,0 ... 1,79
// . ... .
// . ... .
-// 22,0 ... 22,79
-// 23,0 ... 23,79 status line
+// 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)
+static void place_cursor(int row, int col, int opti)
{
- Byte buf[30];
+ char cm1[BUFSIZ];
+ char *cm;
int l;
-
- if (row < 0)
- row = 0;
- if (row >= rows)
- row = rows - 1;
- if (col < 0)
- col = 0;
- if (col >= columns)
- col = columns - 1;
- sprintf((char *) buf, "%c[%d;%dH", 0x1b, row + 1, col + 1);
- l = strlen((char *) buf);
- write(1, buf, l);
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ char cm2[BUFSIZ];
+ Byte *screenp;
+ // char cm3[BUFSIZ];
+ int Rrow= last_row;
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+
+ memset(cm1, '\0', BUFSIZ - 1); // clear the buffer
+
+ if (row < 0) row = 0;
+ if (row >= rows) row = rows - 1;
+ if (col < 0) col = 0;
+ if (col >= columns) col = columns - 1;
+
+ //----- 1. Try the standard terminal ESC sequence
+ sprintf((char *) cm1, CMrc, row + 1, col + 1);
+ cm= cm1;
+ if (opti == FALSE) goto pc0;
+
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ //----- find the minimum # of chars to move cursor -------------
+ //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
+ memset(cm2, '\0', BUFSIZ - 1); // clear the buffer
+
+ // move to the correct row
+ while (row < Rrow) {
+ // the cursor has to move up
+ strcat(cm2, CMup);
+ Rrow--;
+ }
+ while (row > Rrow) {
+ // the cursor has to move down
+ strcat(cm2, CMdown);
+ Rrow++;
+ }
+
+ // now move to the correct column
+ strcat(cm2, "\r"); // start at col 0
+ // just send out orignal source char to get to correct place
+ screenp = &screen[row * columns]; // start of screen line
+ strncat(cm2, screenp, col);
+
+ //----- 3. Try some other way of moving cursor
+ //---------------------------------------------
+
+ // pick the shortest cursor motion to send out
+ cm= cm1;
+ if (strlen(cm2) < strlen(cm)) {
+ cm= cm2;
+ } /* else if (strlen(cm3) < strlen(cm)) {
+ cm= cm3;
+ } */
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+ pc0:
+ l= strlen(cm);
+ if (l) write(1, cm, l); // move the cursor
}
//----- Erase from cursor to end of line -----------------------
static void clear_to_eol()
{
- write(1, "\033[0K", 4); // Erase from cursor to end of line
+ write(1, Ceol, strlen(Ceol)); // Erase from cursor to end of line
}
//----- Erase from cursor to end of screen -----------------------
static void clear_to_eos()
{
- write(1, "\033[0J", 4); // Erase from cursor to end of screen
+ write(1, Ceos, strlen(Ceos)); // Erase from cursor to end of screen
}
//----- Start standout mode ------------------------------------
static void standout_start() // send "start reverse video" sequence
{
- write(1, "\033[7m", 4); // Start reverse video mode
+ write(1, SOs, strlen(SOs)); // Start reverse video mode
}
//----- End standout mode --------------------------------------
static void standout_end() // send "end reverse video" sequence
{
- write(1, "\033[0m", 4); // End reverse video mode
+ write(1, SOn, strlen(SOn)); // End reverse video mode
}
//----- Flash the screen --------------------------------------
static void beep()
{
- write(1, "\007", 1); // send out a bell character
+ write(1, bell, strlen(bell)); // send out a bell character
}
static void indicate_error(char c)
//----- Erase the Screen[] memory ------------------------------
static void screen_erase()
{
- int i;
-
- for (i = 0; i < screensize; i++) {
- screen[i] = '\0';
- }
+ memset(screen, ' ', screensize); // clear new screen
}
//----- Draw the status line at bottom of the screen -------------
static void show_status_line(void)
{
- int cnt;
+ static int last_cksum;
+ int l, cnt, cksum;
cnt = strlen((char *) status_buffer);
- place_cursor(rows - 1, 0); // put cursor on status line
- if (cnt > 0) {
+ 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
+ place_cursor(rows - 1, 0, FALSE); // put cursor on status line
write(1, status_buffer, cnt);
+ clear_to_eol();
+ place_cursor(crow, ccol, FALSE); // put cursor back in correct place
}
- clear_to_eol();
- place_cursor(crow, ccol); // put cursor back in correct place
}
//----- format the status buffer, the bottom line of screen ------
va_list args;
va_start(args, format);
- strcpy((char *) status_buffer, "\033[7m"); // Terminal standout mode on
+ strcpy((char *) status_buffer, SOs); // Terminal standout mode on
vsprintf((char *) status_buffer + strlen((char *) status_buffer), format,
args);
- strcat((char *) status_buffer, "\033[0m"); // Terminal standout mode off
+ strcat((char *) status_buffer, SOn); // Terminal standout mode off
va_end(args);
return;
"%s line %d of %d --%d%%--",
(cfn != 0 ? (char *) cfn : "No file"),
#ifdef BB_FEATURE_VI_READONLY
- (readonly == TRUE ? " [Read only]" : ""),
+ ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
#endif /* BB_FEATURE_VI_READONLY */
(file_modified == TRUE ? " [modified]" : ""),
cur, tot, percent);
//----- Force refresh of all Lines -----------------------------
static void redraw(int full_screen)
{
- place_cursor(0, 0); // put cursor in correct place
+ 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
refresh(full_screen); // this will redraw the entire display
}
+//----- Format a text[] line into a buffer ---------------------
+static void format_line(Byte *dest, Byte *src, int li)
+{
+ int co;
+ Byte c;
+
+ for (co= 0; co < MAX_SCR_COLS; co++) {
+ c= ' '; // assume blank
+ if (li > 0 && co == 0) {
+ c = '~'; // not first line, assume Tilde
+ }
+ // are there chars in text[] and have we gone past the end
+ if (text < end && src < end) {
+ c = *src++;
+ }
+ if (c == '\n')
+ break;
+ if (c < ' ' || c > '~') {
+ if (c == '\t') {
+ c = ' ';
+ // co % 8 != 7
+ for (; (co % tabstop) != (tabstop - 1); co++) {
+ dest[co] = c;
+ }
+ } else {
+ dest[co++] = '^';
+ c |= '@'; // make it visible
+ c &= 0x7f; // get rid of hi bit
+ }
+ }
+ // the co++ is done here so that the column will
+ // not be overwritten when we blank-out the rest of line
+ dest[co] = c;
+ if (src >= end)
+ break;
+ }
+}
+
//----- Refresh the changed screen lines -----------------------
// Copy the source line from text[] into the buffer and note
// if the current screenline is different from the new buffer.
static void refresh(int full_screen)
{
static int old_offset;
- int li, co, changed;
- Byte c, buf[MAX_SCR_COLS];
+ int li, changed;
+ Byte buf[MAX_SCR_COLS];
Byte *tp, *sp; // pointer into text[] and screen[]
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ int last_li= -2; // last line that changed- for optimizing cursor movement
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
#ifdef BB_FEATURE_VI_WIN_RESIZE
window_size_get(0);
#endif /* BB_FEATURE_VI_WIN_RESIZE */
- sync_cursor(dot, &crow, &ccol);
+ sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
tp = screenbegin; // index into text[] of top line
+
// compare text[] to screen[] and mark screen[] lines that need updating
for (li = 0; li < rows - 1; li++) {
- // format current text line into buf with "columns" wide
- for (co = 0; co < columns + offset;) {
- c = ' '; // assume blank
- if (li > 0 && co == 0) {
- c = '~'; // not first line, assume Tilde
- }
- // are there chars in text[]
- // and have we gone past the end
- if (text < end && tp < end) {
- c = *tp++;
- }
- if (c == '\n')
+ int cs, ce; // column start & end
+ memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
+ buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
+ // format current text line into buf
+ format_line(buf, tp, li);
+
+ // skip to the end of the current text[] line
+ while (tp < end && *tp++ != '\n') /*no-op*/ ;
+
+ // see if there are any changes between vitual screen and buf
+ changed = FALSE; // assume no change
+ cs= 0;
+ ce= columns-1;
+ sp = &screen[li * columns]; // start of screen line
+ if (full_screen == TRUE) {
+ // force re-draw of every single column from 0 - columns-1
+ goto re0;
+ }
+ // compare newly formatted buffer with virtual screen
+ // look forward for first difference between buf and screen
+ for ( ; cs <= ce; cs++) {
+ if (buf[cs + offset] != sp[cs]) {
+ changed = TRUE; // mark for redraw
break;
- if (c < ' ' || c > '~') {
- if (c == '\t') {
- c = ' ';
- // co % 8 != 7
- for (; (co % tabstop) != (tabstop - 1); co++) {
- buf[co] = c;
- }
- } else {
- buf[co++] = '^';
- c |= '@'; // make it visible
- c &= 0x7f; // get rid of hi bit
- }
}
- // the co++ is done here so that the column will
- // not be overwritten when we blank-out the rest of line
- buf[co++] = c;
- if (tp >= end)
- break;
- }
- if (co >= columns + offset) {
- // skip to the end of the current text[] line
- while (tp < end && *tp++ != '\n');
}
- // try to keep the cursor near it's current position
- // remember how many chars in this row- where the cursor sits
- // blank out the rest of the buffer
- while (co < MAX_SCR_COLS - 1) {
- buf[co++] = ' ';
- }
- buf[co++] = 0; // NULL terminate the buffer
- // if necessary, update virtual screen[] and terminal from buf[]
- changed = FALSE; // assume no change
- sp = &screen[li * columns]; // start of screen line
- for (co = 0; co < columns; co++) {
- if (sp[co] != buf[co + offset]) {
- sp[co] = buf[co + offset];
+ // look backward for last difference between buf and screen
+ for ( ; ce >= cs; ce--) {
+ if (buf[ce + offset] != sp[ce]) {
changed = TRUE; // mark for redraw
+ break;
}
}
+ // now, cs is index of first diff, and ce is index of last diff
+
// if horz offset has changed, force a redraw
- if (offset != old_offset)
+ if (offset != old_offset) {
+ re0:
changed = TRUE;
+ }
- // write all marked screen lines out to terminal
+ // make a sanity check of columns indexes
+ if (cs < 0) cs= 0;
+ if (ce > columns-1) ce= columns-1;
+ if (cs > ce) { cs= 0; ce= columns-1; }
+ // is there a change between vitual screen and buf
if (changed == TRUE) {
- place_cursor(li, 0); // put cursor in correct place
- clear_to_eol(); // Erase to end of line
- if (full_screen == FALSE) {
- // don't redraw every column on terminal
- // look backwards for last non-blank
- for (co = columns + offset; co >= 0; co--) {
- // break;
- if (buf[co] != ' ')
- break;
- }
- co++;
+ // copy changed part of buffer to virtual screen
+ memmove(sp+cs, buf+(cs+offset), ce-cs+1);
+
+ // move cursor to column of first change
+ if (offset != old_offset) {
+ // opti_cur_move is still too stupid
+ // to handle offsets correctly
+ place_cursor(li, cs, FALSE);
} else {
- // redraw every column on terminal
- co = columns;
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ // if this just the next line
+ // try to optimize cursor movement
+ // otherwise, use standard ESC sequence
+ place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
+ last_li= li;
+#else /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+ place_cursor(li, cs, FALSE); // use standard ESC sequence
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
}
+
// write line out to terminal
- write(1, buf + offset, co);
+ write(1, sp+cs, ce-cs+1);
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ last_row = li;
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
}
}
- place_cursor(crow, ccol);
+ place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
+#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
+ last_row = crow;
+#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
+
if (offset != old_offset)
old_offset = offset;
}
projects / oweals / busybox.git / commitdiff