tabs and tab overview

extract.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <uchar.h>
+
+#include "terminal.h"
+
+struct extraction_context;
+
+struct extraction_context *extract_begin(
+    enum selection_kind kind, bool strip_trailing_empty);
+
+bool extract_one(
+    const struct terminal *term, const struct row *row, const struct cell *cell,
+    int col, void *context);
+
+bool extract_finish(
+    struct extraction_context *context, char **text, size_t *len);
+bool extract_finish_wide(
+    struct extraction_context *context, char32_t **text, size_t *len);