Alt-J joins lines and selects the spaces it put in

helix-golf's text_into_array turns lines into an array with %<A-s>ms"<A-J>i,:
join_selections_space joins like J and leaves one cursor on each space it
inserted. J and Alt-J now make one edit over every range, as helix does,
rather than J being replayed per range; that is what lets Alt-J hand back
all the spaces as the new selection.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

2 files changed, 12 insertions, 0 deletions

diff --git a/test/hxcases/cases.jsonl b/test/hxcases/cases.jsonl
index ada7363b..0b8858e6 100644
--- a/test/hxcases/cases.jsonl
+++ b/test/hxcases/cases.jsonl
@@ -302,6 +302,12 @@
 {"name": "J-empty-next-nospace", "pane": "file", "text": "aa\n\nbb\n", "keys": "J"}
 {"name": "J-last-line-eats-nl", "pane": "file", "text": "aa\nbb\n", "keys": "jJ"}
 {"name": "J-count-ignored", "pane": "file", "text": "a\nb\nc\nd\n", "keys": "3J"}
+{"name": "msel-J-same-line", "pane": "file", "text": "aa bb\ncc\ndd\n", "keys": "wCJ"}
+{"name": "msel-J-shared-line", "pane": "file", "text": "ab\ncd\nef\n", "keys": "%s\\w<ret>J"}
+{"name": "alt-J-selects-space", "pane": "file", "text": "aa\n  bb\ncc\n", "keys": "xx<A-J>"}
+{"name": "alt-J-each-range", "pane": "file", "text": "a\nb\nc\nd\n", "keys": "%<A-s><A-J>"}
+{"name": "alt-J-blank-no-space", "pane": "file", "text": "aa\n\nbb\n", "keys": "<A-J>"}
+{"name": "msel-J-two-lines", "pane": "file", "text": "aa bb\ncc\ndd\nee\n", "keys": "Cs\\w<ret>J"}
 {"name": "indent-basic", "pane": "file", "text": "foo\nbar\n", "keys": "<gt>"}
 {"name": "indent-realign", "pane": "file", "text": "      x\n", "keys": "gs<gt>"}
 {"name": "indent-cursor-maps", "pane": "file", "text": "foo\n", "keys": "ll<gt>"}
diff --git a/test/hxcases/goldens.jsonl b/test/hxcases/goldens.jsonl
index 51ab8939..79745d43 100644
--- a/test/hxcases/goldens.jsonl
+++ b/test/hxcases/goldens.jsonl
@@ -302,6 +302,12 @@
 {"name":"J-empty-next-nospace","text":"aa\nbb\n","mode":"normal","cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0}}
 {"name":"J-last-line-eats-nl","text":"aa\nbb","mode":"normal","cursor":{"row":1,"col":0},"anchor":{"row":1,"col":0}}
 {"name":"J-count-ignored","text":"a b\nc\nd\n","mode":"normal","cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0}}
+{"name":"msel-J-same-line","text":"aa bb cc dd\n","mode":"normal","cursor":{"row":0,"col":8},"anchor":{"row":0,"col":6},"sels":[{"cursor":{"row":0,"col":2},"anchor":{"row":0,"col":0}},{"cursor":{"row":0,"col":8},"anchor":{"row":0,"col":6}}],"primary":1}
+{"name":"msel-J-shared-line","text":"ab cd ef","mode":"normal","cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0},"sels":[{"cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0}},{"cursor":{"row":0,"col":1},"anchor":{"row":0,"col":1}},{"cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3}},{"cursor":{"row":0,"col":4},"anchor":{"row":0,"col":4}},{"cursor":{"row":0,"col":6},"anchor":{"row":0,"col":6}},{"cursor":{"row":0,"col":7},"anchor":{"row":0,"col":7}}],"primary":0}
+{"name":"alt-J-selects-space","text":"aa bb\ncc\n","mode":"normal","cursor":{"row":0,"col":2},"anchor":{"row":0,"col":2}}
+{"name":"alt-J-each-range","text":"a b c d","mode":"normal","cursor":{"row":0,"col":1},"anchor":{"row":0,"col":1},"sels":[{"cursor":{"row":0,"col":1},"anchor":{"row":0,"col":1}},{"cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3}},{"cursor":{"row":0,"col":5},"anchor":{"row":0,"col":5}}],"primary":0}
+{"name":"alt-J-blank-no-space","text":"aa\nbb\n","mode":"normal","cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0}}
+{"name":"msel-J-two-lines","text":"aa bb cc dd\nee\n","mode":"normal","cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0},"sels":[{"cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0}},{"cursor":{"row":0,"col":6},"anchor":{"row":0,"col":6}}],"primary":0}
 {"name":"indent-basic","text":"    foo\nbar\n","mode":"normal","cursor":{"row":0,"col":4},"anchor":{"row":0,"col":4}}
 {"name":"indent-realign","text":"        x\n","mode":"normal","cursor":{"row":0,"col":8},"anchor":{"row":0,"col":8}}
 {"name":"indent-cursor-maps","text":"    foo\n","mode":"normal","cursor":{"row":0,"col":6},"anchor":{"row":0,"col":6}}