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-rw-r--r--editors/vi.c188
1 files changed, 112 insertions, 76 deletions
diff --git a/editors/vi.c b/editors/vi.c
index 374d161d1..ae86b7233 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-01 18:28:28 +0000