scrolllist: add support for marking items

1 files changed, 32 insertions, 0 deletions

diff --git a/tui/widget/list/scrolllist.ha b/tui/widget/list/scrolllist.ha
index 0079363..ab1e7bc 100644
--- a/tui/widget/list/scrolllist.ha
+++ b/tui/widget/list/scrolllist.ha
@@ -11,6 +11,7 @@ export type scrolllist = struct {
 	items: []str,
 	frame: frame,
 	cursor: int,
+	marked: []int,
 };
 
 // Return an instance of list. out is the tty file, pos the starting position,
@@ -51,6 +52,7 @@ style: (*widget::style | void), items: str...) (scrolllist | tty::error) = {
 			end = end,
 		},
 		cursor = 0,
+		marked = [],
 	};
 };
 
@@ -70,7 +72,9 @@ fn resizescrolllist(widget: *widget::widget, ttysize: tty::ttysize) void = {
 };
 
 fn finishscrolllist(widget: *widget::widget) void = {
+	const list = widget: *scrolllist;
 	widget::finish(widget);
+	free(list.marked);
 };
 
 export fn down(li: *scrolllist) void = {
@@ -152,9 +156,37 @@ fn stylesscrolllist(widget: *widget::widget, txt: str, idx: size) str = {
 	if (idx == list.cursor) {
 		memio::concat(&st, "\x1B[7m")!;
 	};
+	if (ismarked(*list, idx) is size) {
+		memio::concat(&st, "\x1B[44m")!;
+	};
 	memio::concat(&st, txt)!;
 	if (idx == list.cursor) {
 		memio::concat(&st, "\x1B[27m")!;
 	};
+	if (ismarked(*list, idx) is size) {
+		memio::concat(&st, "\x1B[49m")!;
+	};
 	return strings::dup(memio::string(&st)!);
 };
+
+fn ismarked(li: scrolllist, j: int) (size | void) = {
+	for (let i = 0z; i < len(li.marked); i += 1) {
+		const idx = li.marked[i];
+		if (idx == j) {
+			return i;
+		};
+	};
+	return;
+};
+
+export fn mark(li: *scrolllist) bool = {
+	defer down(li);
+	match (ismarked(*li, li.cursor)) {
+	case let s: size =>
+		delete(li.marked[s]);
+		return false;
+	case void =>
+		append(li.marked, li.cursor);
+		return true;
+	};
+};