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| author | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2024-12-04 02:22:36 +0300 |
|---|---|---|
| committer | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2024-12-04 11:43:18 +0300 |
| commit | 3a823fb43ba0abe52f3152d337675e9ed9a3f175 (patch) | |
| tree | f63143368fe15b4fbf88f9646a0a913eb46717fd /src/core-commands.h | |
| parent | 11054d94a99e8c11d6010b117c84ee88b4fa1a73 (diff) | |
| download | sciteco-3a823fb43ba0abe52f3152d337675e9ed9a3f175.tar.gz | |
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.
Diffstat (limited to 'src/core-commands.h')
| -rw-r--r-- | src/core-commands.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/core-commands.h b/src/core-commands.h index e30770d..fbb67fa 100644 --- a/src/core-commands.h +++ b/src/core-commands.h @@ -38,9 +38,18 @@ TECO_DECLARE_STATE(teco_state_ascii); TECO_DECLARE_STATE(teco_state_escape); TECO_DECLARE_STATE(teco_state_ecommand); +typedef struct { + gsize from; /*< start position in bytes */ + gsize to; /*< end position in bytes */ +} teco_range_t; + +extern guint teco_ranges_count; +extern teco_range_t *teco_ranges; + gboolean teco_state_insert_initial(teco_machine_main_t *ctx, GError **error); gboolean teco_state_insert_process(teco_machine_main_t *ctx, const teco_string_t *str, gsize new_chars, GError **error); +teco_state_t *teco_state_insert_done(teco_machine_main_t *ctx, const teco_string_t *str, GError **error); /* in cmdline.c */ gboolean teco_state_insert_process_edit_cmd(teco_machine_main_t *ctx, teco_machine_t *parent_ctx, gunichar chr, GError **error); @@ -57,7 +66,7 @@ gboolean teco_state_insert_process_edit_cmd(teco_machine_main_t *ctx, teco_machi static teco_state_t * \ NAME##_done(teco_machine_main_t *ctx, const teco_string_t *str, GError **error) \ { \ - return &teco_state_start; /* nothing to be done when done */ \ + return teco_state_insert_done(ctx, str, error); \ } \ TECO_DEFINE_STATE_EXPECTSTRING(NAME, \ .initial_cb = (teco_state_initial_cb_t)teco_state_insert_initial, \ |