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Implement basic word wrapping

This commit is contained in:
Drew DeVault 2020-09-20 20:52:18 -04:00
parent e1d9773742
commit a61a75f837
1 changed files with 57 additions and 4 deletions
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61
src/gmnlm.c
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@ -146,6 +146,45 @@ trim_ws(char *in)
return in;
}
static int
wrap(FILE *f, char *s, struct winsize *ws, int *row, int *col)
{
if (!s[0]) {
fprintf(f, "\n");
return 0;
}
for (int i = 0; s[i]; ++i) {
// TODO: Other control sequences, and eat ANSI escapes before
// they become a problem
switch (s[i]) {
case '\n':
assert(0); // Not supposed to happen
case '\t':
*col = *col + (8 - *col % 8);
break;
default:
*col += 1;
break;
}
if (*col >= ws->ws_col) {
int j = i--;
while (&s[i] != s && !isspace(s[i])) --i;
if (&s[i] == s) {
i = j;
}
char c = s[i];
s[i] = 0;
int n = fprintf(f, "%s\n", s);
s[i] = c;
*row += 1;
*col = 0;
return n;
}
}
return fprintf(f, "%s\n", s) - 1;
}
static bool
display_gemini(struct browser *browser, struct gemini_response *resp)
{
@ -157,15 +196,29 @@ display_gemini(struct browser *browser, struct gemini_response *resp)
struct winsize ws;
ioctl(fileno(browser->tty), TIOCGWINSZ, &ws);
char *text = NULL;
int row = 0, col = 0;
struct gemini_token tok;
struct link **next = &browser->links;
while (gemini_parser_next(&p, &tok) == 0) {
while (text != NULL || gemini_parser_next(&p, &tok) == 0) {
switch (tok.token) {
case GEMINI_TEXT:
// TODO: word wrap
col += fprintf(browser->tty, " %s\n",
trim_ws(tok.text));
if (text == NULL) {
text = tok.text;
}
do {
col += fprintf(browser->tty, " ");
int w = wrap(browser->tty, text, &ws, &row, &col);
text += w;
if (row >= ws.ws_row - 4) {
break;
}
} while (text[0]);
if (!text[0]) {
text = NULL;
}
break;
case GEMINI_LINK:
col += fprintf(browser->tty, "%d) %s\n", nlinks++,