strip off the largest shared prefix between paths in select_buf()

1 files changed, 19 insertions, 1 deletions

diff --git a/main.c b/main.c
index d6e39b1..3fa36f5 100644
--- a/main.c
+++ b/main.c
@@ -77,6 +77,8 @@ typedef struct {
         u32 search_char;
         int search_char_dir;
         int search_char_incl;
+
+	Str homedir;
 } Editor;
 
 Editor e = { 0 };
@@ -1204,11 +1206,26 @@ Str select_file(void) {
 	return s;
 }
 
+Str minimum_prefix(Str *s, u32 n) {
+	if (!n) return (Str) { 0, 0 };
+	Str p = s[0];
+	for (u32 i = 1; i < n; i++) {
+		u32 pn = 0;
+		while (pn < s[i].n && p.s[pn] == s[i].s[pn]) pn++;
+		if (pn < p.n) p.n = pn;
+	}
+	return p;
+}
+
 int select_buf(void) {
 	DYNARR(Str) opt = { 0 };
 	for (u32 i = 0; i < e.bufn; i++) {
 		DA_APUSH(&opt, &e.scratch, e.buf[i].path);
 	}
+	Str prefix = minimum_prefix(opt.v, opt.n);
+	while (prefix.n > 0 && prefix.s[prefix.n-1] != '/') prefix.n--;
+	for (u32 i = 0; i < opt.n; i++)
+		opt.v[i] = str_skip(opt.v[i], prefix.n);
 	int o = select_opt(opt.v, opt.c, S("Buffer: "));
 	if (o == -1) return -1;
 	return o;
@@ -1216,6 +1233,7 @@ int select_buf(void) {
 
 int main(int argc, const char **argv) {
 	ed_init(&e);
+	e.homedir = str_from_cstr(getenv("HOME"));
 
 	if (argc > 1) {
 		ed_buf_close(&e, 0); /* close scratch buffer */
@@ -1381,7 +1399,7 @@ int main(int argc, const char **argv) {
 						e.bufi = ed_buf_open(&e, str_to_cstr(s, &e.scratch));
 					}
 				} break;
-				case 'b': {
+				case 's': {
 					int b = select_buf();
 					if (b != -1) e.bufi = b;
 				} break;