Add setcursor and reframe to scrolllist and flesh out il

2 files changed, 77 insertions, 0 deletions

diff --git a/cmd/il.ha b/cmd/il.ha
index ce4b89b..abbde84 100644
--- a/cmd/il.ha
+++ b/cmd/il.ha
@@ -5,6 +5,7 @@ use bufio;
 use os;
 use strings;
 use fmt;
+use io;
 
 export fn main() void = {
 	const scanner = bufio::newscanner(os::stdin);
@@ -28,6 +29,9 @@ export fn main() void = {
 
 	vl.layout.print(&vl);
 
+	let term: (str | void) = void;
+	defer if (term is str) free(term as str) else void;
+	let revsearch = false;
 	for (true) {
 		const r = tui::read(&state)!;
 		if (r == 'j') {
@@ -55,6 +59,61 @@ export fn main() void = {
 			fmt::println(li.items[li.cursor])!;
 			break;
 		};
+		if (r == '/' || r == '?') {
+			revsearch = r == '?';
+			term = search(&state, &li, r as rune);
+			if (revsearch) prevsearch(&li, term) else nextsearch(&li, term);
+		};
+		if (r == 'n') {
+			if (revsearch) prevsearch(&li, term) else nextsearch(&li, term);
+		};
+		if (r == 'N') {
+			if (!revsearch) prevsearch(&li, term) else nextsearch(&li, term);
+		};
 		vl.layout.print(&vl);
 	};
 };
+
+fn search(state: *tui::tui, li: *list::scrolllist, prefix: (str | rune) = '/') (str | void) = {
+	tui::unraw(state);
+	defer tui::raw(state)!;
+	fmt::fprint(state.out, prefix)!;
+	const uline = match (bufio::read_line(state.out)!) {
+	case let u: []u8 =>
+		yield u;
+	case io::EOF =>
+		return;
+	};
+	defer free(uline);
+	return strings::dup(strings::fromutf8(uline)!);
+};
+
+fn nextsearch(li: *list::scrolllist, term: (str | void)) void = {
+	const term = match (term) {
+	case let term: str =>
+		yield term;
+	case void =>
+		return;
+	};
+	for (let i = li.cursor + 1; i < len(li.items); i += 1) {
+		if (strings::contains(li.items[i], term)) {
+			list::setcursor(li, i: u16);
+			return;
+		};
+	};
+};
+
+fn prevsearch(li: *list::scrolllist, term: (str | void)) void = {
+	const term = match (term) {
+	case let term: str =>
+		yield term;
+	case void =>
+		return;
+	};
+	for (let i: int = li.cursor: int - 1; i >= 0; i -= 1) {
+		if (strings::contains(li.items[i], term)) {
+			list::setcursor(li, i: u16);
+			return;
+		};
+	};
+};
diff --git a/tui/widget/list/scrolllist.ha b/tui/widget/list/scrolllist.ha
index 3aaad87..d08c7d7 100644
--- a/tui/widget/list/scrolllist.ha
+++ b/tui/widget/list/scrolllist.ha
@@ -115,6 +115,24 @@ export fn bottom(li: *scrolllist) void = {
 	li.frame.start = len(li.items): u16 - sz;
 };
 
+export fn setcursor(li: *scrolllist, newpos: u16) void = {
+	li.cursor = newpos;
+	reframe(li);
+};
+
+fn reframe(li: *scrolllist) void = {
+	if (li.cursor > li.frame.end) {
+		const diff = li.frame.end - li.frame.start;
+		li.frame.start = li.cursor;
+		li.frame.end = li.frame.start + diff;
+	};
+	if (li.cursor < li.frame.start) {
+		const diff = li.frame.end - li.frame.start;
+		li.frame.end = li.cursor;
+		li.frame.start = li.frame.end - diff;
+	};
+};
+
 fn stylesscrolllist(widget: *widget::widget, txt: str, idx: size) str = {
 	const list = widget: *scrolllist;
 	const idx = idx + list.frame.start;