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Fix line wrapping/padding issues

It should now parse messages with newlines properly as well as messages that
contain long sequences of characters with no spaces
This commit is contained in:
jfreegman 2020-11-24 19:47:04 -05:00
parent f0c4906fdc
commit d35a38735b
No known key found for this signature in database
GPG Key ID: 3627F3144076AE63
3 changed files with 71 additions and 33 deletions

View File

@ -71,7 +71,7 @@ void line_info_reset_start(ToxWindow *self, struct history *hst)
do {
curlines += line->format_lines;
line = line->prev;
} while (line->prev && curlines + line->format_lines < max_y);
} while (line->prev && curlines + line->format_lines <= max_y);
hst->line_start = line;
}
@ -165,6 +165,36 @@ static int rspace_index(const char *s, int limit)
return -1;
}
/* Returns the first index in `s` containing a newline byte found before `limit`.
* Returns -1 if no newline is found.
*/
static int newline_index(const char *s, int limit)
{
char ch;
for (int i = 0; i < limit && (ch = s[i]); ++i) {
if (ch == '\n') {
return i;
}
}
return -1;
}
/* Returns the number of newline bytes in `s` */
static unsigned int newline_count(const char *s)
{
char ch;
unsigned int count = 0;
for (size_t i = 0; (ch = s[i]); ++i) {
if (ch == '\n') {
++count;
}
}
return count;
}
/* Prints `line` message to window, wrapping at the last word that fits on the current line.
* This function updates the `format_lines` field of `line` according to current window dimensions.
@ -176,49 +206,61 @@ static void print_wrap(WINDOW *win, struct line_info *line, int max_x)
{
const char *msg = line->msg;
uint16_t length = line->msg_len;
uint16_t lines = line->newlines;
uint16_t lines = 0;
const int x_start = line->len - line->msg_len - 1; // manually keep track of x position because ncurses sucks
int x_limit = max_x - x_start;
if (x_limit <= 0) {
fprintf(stderr, "Warning: x_limit <= 0 in print_wrap(): %d\n", x_limit);
return;
}
while (msg) {
++lines;
int x_limit = max_x - x_start;
if (length < x_limit || x_limit <= 0) {
if (win) {
wprintw(win, "%s", msg);
if (length < x_limit) {
if (print_n_chars(win, msg, length)) {
lines += newline_count(msg);
}
++lines;
break;
}
int newline_idx = newline_index(msg, x_limit - 1);
if (newline_idx >= 0) {
print_n_chars(win, msg, newline_idx + 1);
msg += newline_idx + 1;
length -= (newline_idx + 1);
x_limit = max_x; // if we find a newline we stop adding column padding for rest of message
++lines;
continue;
}
int space_idx = rspace_index(msg, x_limit - 1);
if (space_idx >= 1) {
bool newline = print_n_chars(win, msg, space_idx);
msg += space_idx;
length -= space_idx;
x_limit -= space_idx;
print_n_chars(win, msg, space_idx);
msg += space_idx + 1;
length -= (space_idx + 1);
// replace last space on current line with newline if we intend to split it
if (length >= x_limit && !newline) {
--length;
++msg;
if (win) {
waddch(win, '\n');
for (size_t i = 0; i < x_start; ++i) {
waddch(win, ' '); // Add padding to the start of the next line
}
}
if (win && length >= x_limit - space_idx) {
waddch(win, '\n');
}
} else {
print_n_chars(win, msg, x_limit);
msg += x_limit;
length -= x_limit;
}
// Add padding to the start of the next line
if (win && x_limit < max_x) {
for (size_t i = 0; i < x_start; ++i) {
waddch(win, ' ');
}
}
++lines;
}
line->format_lines = lines;
@ -259,7 +301,8 @@ int line_info_add(ToxWindow *self, const char *timestr, const char *name1, const
exit_toxic_err("failed in line_info_add", FATALERR_MEMORY);
}
char frmt_msg[MAX_LINE_INFO_MSG_SIZE] = {0};
char frmt_msg[MAX_LINE_INFO_MSG_SIZE];
frmt_msg[0] = 0;
va_list args;
va_start(args, msg);
@ -314,12 +357,6 @@ int line_info_add(ToxWindow *self, const char *timestr, const char *name1, const
snprintf(new_line->msg, sizeof(new_line->msg), "%s", frmt_msg);
msg_len = strlen(new_line->msg);
len += msg_len;
for (size_t i = 0; frmt_msg[i]; ++i) {
if (frmt_msg[i] == '\n') {
++new_line->newlines;
}
}
}
if (timestr) {
@ -523,6 +560,7 @@ void line_info_print(ToxWindow *self)
if (line->noread_flag == false) {
line->noread_flag = true;
line->len += 2;
line->msg_len += 2;
}
}

View File

@ -58,7 +58,6 @@ struct line_info {
uint32_t id;
uint16_t len; /* combined length of entire line */
uint16_t msg_len; /* length of the message */
uint8_t newlines;
uint16_t format_lines; /* number of lines the combined string takes up (dynamically set) */
struct line_info *prev;

View File

@ -88,6 +88,7 @@ static void cqueue_mark_read(ToxWindow *self, struct cqueue_msg *msg)
if (line->noread_flag == true) {
line->len -= 2;
line->msg_len -= 2;
line->noread_flag = false;
}