1 files changed, 74 insertions, 0 deletions
diff --git a/examples/dte/copy.c b/examples/dte/copy.c
new file mode 100644
index 0000000..c3b989e
--- /dev/null
+++ b/examples/dte/copy.c
@@ -0,0 +1,74 @@
+#include <stdlib.h>
+#include "copy.h"
+#include "block-iter.h"
+#include "change.h"
+#include "misc.h"
+#include "move.h"
+#include "selection.h"
+#include "util/debug.h"
+
+void record_copy(Clipboard *clip, char *buf, size_t len, bool is_lines)
+{
+    BUG_ON(len && !buf);
+    free(clip->buf);
+    clip->buf = buf;
+    clip->len = len;
+    clip->is_lines = is_lines;
+}
+
+void copy(Clipboard *clip, View *view, size_t len, bool is_lines)
+{
+    if (len) {
+        char *buf = block_iter_get_bytes(&view->cursor, len);
+        record_copy(clip, buf, len, is_lines);
+    }
+}
+
+void cut(Clipboard *clip, View *view, size_t len, bool is_lines)
+{
+    if (len) {
+        copy(clip, view, len, is_lines);
+        buffer_delete_bytes(view, len);
+    }
+}
+
+void paste(Clipboard *clip, View *view, PasteLinesType type, bool move_after)
+{
+    if (clip->len == 0) {
+        return;
+    }
+
+    BUG_ON(!clip->buf);
+    if (!clip->is_lines || type == PASTE_LINES_INLINE) {
+        insert_text(view, clip->buf, clip->len, move_after);
+        return;
+    }
+
+    size_t del_count = 0;
+    if (view->selection) {
+        del_count = prepare_selection(view);
+        unselect(view);
+    }
+
+    const long x = view_get_preferred_x(view);
+    if (!del_count) {
+        if (type == PASTE_LINES_BELOW_CURSOR) {
+            block_iter_eat_line(&view->cursor);
+        } else {
+            BUG_ON(type != PASTE_LINES_ABOVE_CURSOR);
+            block_iter_bol(&view->cursor);
+        }
+    }
+
+    buffer_replace_bytes(view, del_count, clip->buf, clip->len);
+
+    if (move_after) {
+        block_iter_skip_bytes(&view->cursor, clip->len);
+    } else {
+        // Try to keep cursor column
+        move_to_preferred_x(view, x);
+    }
+
+    // New preferred_x
+    view_reset_preferred_x(view);
+}