text: add text_object_find_next/prev

Add two new text-object functions to search forwards/backwards
for a string literal (not a regex) with the same signature as
text_object_word_find_next/prev.  This allows them to be used
interchangeably with the word based variant through function pointers.

2 files changed, 17 insertions, 0 deletions

diff --git a/text-objects.c b/text-objects.c
index fb5adc2..69ea91c 100644
--- a/text-objects.c
+++ b/text-objects.c
@@ -137,6 +137,20 @@ Filerange text_object_word_find_prev(Text *txt, size_t pos, const char *word) {
 	}
 }
 
+Filerange text_object_find_next(Text *txt, size_t pos, const char *search) {
+	size_t start = text_find_next(txt, pos, search);
+	if (start == pos)
+		return text_range_empty();
+	return text_range_new(start, start+strlen(search));
+}
+
+Filerange text_object_find_prev(Text *txt, size_t pos, const char *search) {
+	size_t start = text_find_prev(txt, pos, search);
+	if (start == pos)
+		return text_range_empty();
+	return text_range_new(start, start+strlen(search));
+}
+
 Filerange text_object_line(Text *txt, size_t pos) {
 	Filerange r;
 	r.start = text_line_begin(txt, pos);
diff --git a/text-objects.h b/text-objects.h
index abab46e..9bf13e5 100644
--- a/text-objects.h
+++ b/text-objects.h
@@ -19,6 +19,9 @@ Filerange text_object_word_outer(Text*, size_t pos);
 /* find next occurance of `word' (as word not substring) in forward/backward direction */
 Filerange text_object_word_find_next(Text*, size_t pos, const char *word);
 Filerange text_object_word_find_prev(Text*, size_t pos, const char *word);
+/* find next occurance of a literal string (not regex) in forward/backward direction */
+Filerange text_object_find_next(Text *txt, size_t pos, const char *search);
+Filerange text_object_find_prev(Text *txt, size_t pos, const char *search);
 /* same semantics as above but for a longword (i.e. delimited by white spaces) */
 Filerange text_object_longword(Text*, size_t pos);
 Filerange text_object_longword_outer(Text*, size_t pos);