From 00e03d8fb65119e736dae4db8335e1ac67aac23e Mon Sep 17 00:00:00 2001
From: tslil <tslil@posteo.de>
Date: Fri, 31 Oct 2025 12:19:33 +0000
Subject: Rework character and end implementations

---
 .../src/selection_functions/function_end.rs        | 50 +++++++++++++++++-----
 1 file changed, 40 insertions(+), 10 deletions(-)

(limited to 'rprt-engine/src/selection_functions/function_end.rs')

diff --git a/rprt-engine/src/selection_functions/function_end.rs b/rprt-engine/src/selection_functions/function_end.rs
index 47cff79..3f18fd3 100644
--- a/rprt-engine/src/selection_functions/function_end.rs
+++ b/rprt-engine/src/selection_functions/function_end.rs
@@ -4,14 +4,43 @@ use crate::selection_functions::types::{get_buffer, SFArguments, SFError, SFResu
 use crate::state::EditorState;
 
 selection_function! {
-    name: end_sequential,
+    name: end,
     niladic: |es: &EditorState| {
         let buf = get_buffer(es, es.current_buffer_id)?;
         Ok(Selection::Position {
             buffer_id: es.current_buffer_id,
-            pos: buf.max_pos()
+            pos: buf.max_pos(),
         })
     },
+    monadic_rank0: |_, buffer_id, pos | Ok(Selection::Position { buffer_id, pos }),
+    monadic_rank1: |_, buffer_id, int | Ok(Selection::Position { buffer_id, pos: int.end })
+}
+
+selection_function! {
+    name: reverse_end,
+    niladic: |es: &EditorState| {
+        Ok(Selection::Position {
+            buffer_id: es.current_buffer_id,
+            pos: 0,
+        })
+    },
+    monadic_rank0: |_, buffer_id, pos | Ok(Selection::Position { buffer_id, pos }),
+    monadic_rank1: |_, buffer_id, int | Ok(Selection::Position { buffer_id, pos: int.start })
+}
+
+selection_function! {
+    name: sequential_end,
+    niladic: |_| Err(SFError::NoNiladicForm(";$").into()),
+    monadic_rank0: |_, buffer_id, pos| Ok(Selection::Position { buffer_id, pos }),
+    monadic_rank1: |es, buffer_id, _| {
+        let buf = get_buffer(es, buffer_id)?;
+        Ok(Selection::Position { buffer_id, pos: buf.max_pos() })
+    }
+}
+
+selection_function! {
+    name: sequential_reverse_end,
+    niladic: |_| Err(SFError::NoNiladicForm(";'$").into()),
     monadic_rank0: |_, buffer_id, pos| {
         Ok(Selection::Position { buffer_id, pos })
     },
@@ -24,14 +53,15 @@ selection_function! {
 }
 
 selection_function! {
-    name: end_structural,
-    niladic: |es: &EditorState| {
-        let buf = get_buffer(es, es.current_buffer_id)?;
+    name: reverse_sequential_end,
+    niladic: |_| Err(SFError::NoNiladicForm("';$").into()),
+    monadic_rank0: |_, buffer_id, pos| {
+        Ok(Selection::Position { buffer_id, pos })
+    },
+    monadic_rank1: |_, buffer_id, interval| {
         Ok(Selection::Position {
-            buffer_id: es.current_buffer_id,
-            pos: buf.max_pos(),
+            buffer_id,
+            pos: interval.end,
         })
-    },
-    monadic_rank0: |_, buffer_id, pos | Ok(Selection::Position { buffer_id, pos }),
-    monadic_rank1: |_, buffer_id, int | Ok(Selection::Position { buffer_id, pos: int.end })
+    }
 }
-- 
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