static void refreshLine(const char *prompt, struct current *current)
{
int plen;
int pchars;
int backup = 0;
int i;
const char *buf = current->buf;
int chars = current->chars;
int pos = current->pos;
int b;
int ch;
int n;
int width;
int bufwidth;
/* Should intercept SIGWINCH. For now, just get the size every time */
getWindowSize(current);
plen = strlen(prompt);
pchars = utf8_strwidth(prompt, utf8_strlen(prompt, plen));
/* Scan the prompt for embedded ansi color control sequences and
* discount them as characters/columns.
*/
pchars -= countColorControlChars(prompt);
/* Account for a line which is too long to fit in the window.
* Note that control chars require an extra column
*/
/* How many cols are required to the left of 'pos'?
* The prompt, plus one extra for each control char
*/
n = pchars + utf8_strwidth(buf, utf8_strlen(buf, current->len));
b = 0;
for (i = 0; i < pos; i++) {
b += utf8_tounicode(buf + b, &ch);
if (ch < ' ') {
n++;
}
}
/* Pluse one if the current char is a control character */
if (current->pos < current->chars && get_char(current, current->pos) < ' ') {
n++;
}
/* If too many are needed, strip chars off the front of 'buf'
* until it fits. Note that if the current char is a control character,
* we need one extra col.
*/
while (n >= current->cols && pos > 0) {
b = utf8_tounicode(buf, &ch);
if (ch < ' ') {
n--;
}
n -= utf8_width(ch);
buf += b;
pos--;
chars--;
}
/* Cursor to left edge, then the prompt */
cursorToLeft(current);
outputChars(current, prompt, plen);
/* Now the current buffer content */
/* Need special handling for control characters.
* If we hit 'cols', stop.
*/
b = 0; /* unwritted bytes */
n = 0; /* How many control chars were written */
width = 0; /* current display width */
bufwidth = utf8_strwidth(buf, pos);
for (i = 0; i < chars; i++) {
int ch;
int w = utf8_tounicode(buf + b, &ch);
if (ch < ' ') {
n++;
}
width += utf8_width(ch);
if (pchars + width + n >= current->cols) {
break;
}
if (ch < ' ') {
/* A control character, so write the buffer so far */
outputChars(current, buf, b);
buf += b + w;
b = 0;
outputControlChar(current, ch + '@');
if (i < pos) {
backup++;
}
}
else {
b += w;
}
}
outputChars(current, buf, b);
/* Erase to right, move cursor to original position */
eraseEol(current);
setCursorPos(current, bufwidth + pchars + backup);
}
static void refreshLine(const char *prompt, struct current *current)
{
int plen;
int pchars;
int backup = 0;
int i;
const char *buf = current->buf;
int chars = current->chars;
int pos = current->pos;
int b;
int ch;
int n;
/* Should intercept SIGWINCH. For now, just get the size every time */
getWindowSize(current);
plen = strlen(prompt);
pchars = utf8_strlen(prompt, plen);
/* Scan the prompt for embedded ansi color control sequences and
* discount them as characters/columns.
*/
pchars -= countColorControlChars(prompt);
/* Account for a line which is too long to fit in the window.
* Note that control chars require an extra column
*/
/* How many cols are required to the left of 'pos'?
* The prompt, plus one extra for each control char
*/
n = pchars + utf8_strlen(buf, current->len);
b = 0;
for (i = 0; i < pos; i++) {
b += utf8_tounicode(buf + b, &ch);
if (ch < ' ') {
n++;
}
}
/* If too many are needed, strip chars off the front of 'buf'
* until it fits. Note that if the current char is a control character,
* we need one extra col.
*/
if (current->pos < current->chars && get_char(current, current->pos) < ' ') {
n++;
}
while (n >= current->cols && pos > 0) {
b = utf8_tounicode(buf, &ch);
if (ch < ' ') {
n--;
}
n--;
buf += b;
pos--;
chars--;
}
/* Cursor to left edge, then the prompt */
cursorToLeft(current);
outputChars(current, prompt, plen);
/* Now the current buffer content, but only if not fully hidden */
if (is_hidden != LN_HIDDEN_ALL) {
/* Need special handling for control characters.
* If we hit 'cols', stop.
*/
b = 0; /* unwritted bytes */
n = 0; /* How many control chars were written */
for (i = 0; i < chars; i++) {
int ch;
int w = utf8_tounicode(buf + b, &ch);
if (!is_hidden && ch < ' ') {
n++;
}
if (pchars + i + n >= current->cols) {
break;
}
if (is_hidden == LN_HIDDEN_STAR) {
/* In hidden/star mode all user-entered characters are
* shown as astericks ('*'). This is like control chars,
* except for a different translation. */
/* assert (b == 0) */
outputChars(current, "*", 1);
buf += w;
/* keep b = 0; */
}
else if (ch < ' ') {
/* A control character, so write the buffer so far */
outputChars(current, buf, b);
buf += b + w;
b = 0;
outputControlChar(current, ch + '@');
if (i < pos) {
backup++;
}
}
else {
b += w;
}
}
/* if (is_hidden) assert (b==0) */
outputChars(current, buf, b);
/* Erase to right, move cursor to original position */
eraseEol(current);
setCursorPos(current, pos + pchars + backup);
}
}
