From 3a823fb43ba0abe52f3152d337675e9ed9a3f175 Mon Sep 17 00:00:00 2001 From: Robin Haberkorn Date: Wed, 4 Dec 2024 02:22:36 +0300 Subject: implemented ^Y/^S commands for receiving pattern match/insertion ranges and lengths (refs #27) * Allows storing pattern matches into Q-Registers (^YXq). * You can also refer to subpatterns marked by ^E[...] by passing a number > 0. This is equivalent to \0-9 references in many programming languages. * It's especially useful for supporting TECO's equivalent of structural regular expressions. This will be done with additional macros. * You can also simply back up to the beginning of an insertion or search. So I...$^SC leaves dot at the beginning of the insertion. S...$^SC leaves dot before the found pattern. This has been previously requested by users. * Perhaps there should be ^Y string building characters as well to backreference in search-replacement commands (TODO). This means that the search commands would have to store the matched text itself in teco_range_t structures since FR deletes the matched text before processing the replacement string. It could also be made into a FR/FS-specific construct, so we don't fetch the substrings unnecessarily. * This differs from DEC TECO in always returning the same range even after dot movements, since we are storing start/end byte positions instead of only the length. Also DEC TECO does not support fetching subpattern ranges. --- src/qreg-commands.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/qreg-commands.c') diff --git a/src/qreg-commands.c b/src/qreg-commands.c index 89618da..9f22de9 100644 --- a/src/qreg-commands.c +++ b/src/qreg-commands.c @@ -299,6 +299,7 @@ teco_state_queryqreg_got_register(teco_machine_main_t *ctx, teco_qreg_t *qreg, /*$ Q Qq query * Qq -> n -- Query Q-Register existence, its integer or string characters + * -Qq -> -n * Qq -> character * :Qq -> -1 | size * @@ -533,6 +534,10 @@ teco_state_getqregstring_got_register(teco_machine_main_t *ctx, teco_qreg_t *qre if (!qreg->vtable->get_string(qreg, &str.data, &str.len, NULL, error)) return NULL; + teco_undo_gsize(teco_ranges[0].from) = teco_interface_ssm(SCI_GETCURRENTPOS, 0, 0); + teco_undo_gsize(teco_ranges[0].to) = teco_ranges[0].from + str.len; + teco_undo_guint(teco_ranges_count) = 1; + if (str.len > 0) { teco_interface_ssm(SCI_BEGINUNDOACTION, 0, 0); teco_interface_ssm(SCI_ADDTEXT, str.len, (sptr_t)str.data); -- cgit v1.2.3