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mruby-bin-mirb: align dedent to proper indent level

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Instead of just removing 2 spaces, perform_dedent() now calculates
the expected indent level from previous lines and aligns to that.

Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2025-12-15 11:11:17 +09:00
parent e901b6d1a3
commit f585cc2eff
1 changed files with 19 additions and 4 deletions
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mrbgems/mruby-bin-mirb/tools/mirb/mirb_editor.c
+19 -4
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@@ -207,11 +207,26 @@ static void
perform_dedent(mirb_buffer *buf)
{
const char *line = mirb_buffer_current_line(buf);
size_t spaces = leading_spaces(line);
size_t current_spaces = leading_spaces(line);
int expected_indent = 0;
/* Remove up to 2 spaces */
size_t to_remove = (spaces >= 2) ? 2 : spaces;
if (to_remove > 0) {
/* Calculate expected indent from code up to previous line */
if (buf->cursor_line > 0) {
char *partial = buffer_to_string_upto_line(buf, buf->cursor_line - 1);
if (partial) {
expected_indent = calc_indent_level(partial);
free(partial);
}
}
/* Dedent one level for keywords like end, else, etc. */
if (expected_indent > 0) expected_indent--;
size_t target_spaces = (size_t)(expected_indent * 2);
/* Only dedent if we have more spaces than target */
if (current_spaces > target_spaces) {
size_t to_remove = current_spaces - target_spaces;
size_t saved_col = buf->cursor_col;
/* Move cursor to start of line and delete leading spaces */
buf->cursor_col = 0;