From 4ae16615e88251ff294533624692c2bec49e3a68 Mon Sep 17 00:00:00 2001
From: Adam Harrison <adamdharrison@gmail.com>
Date: Sun, 29 Aug 2021 20:05:58 -0400
Subject: [PATCH] Fixed cursor movement.

---
 data/core/doc/init.lua | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/data/core/doc/init.lua b/data/core/doc/init.lua
index 2165ed83..854f2039 100644
--- a/data/core/doc/init.lua
+++ b/data/core/doc/init.lua
@@ -320,21 +320,20 @@ function Doc:raw_insert(line, col, text, undo_stack, time)
 
   -- splice lines into line array
   common.splice(self.lines, line, 1, lines)
+  
+  -- keep cursors where they should be
+  for idx, cline1, ccol1, cline2, ccol2 in self:get_selections(true, true) do
+    if cline1 < line then break end
+    local line_addition = (line < cline1 or col < ccol1) and #lines - 1 or 0
+    local column_addition = line == cline1 and ccol1 > col and len or 0
+    self:set_selections(idx, cline1 + line_addition, ccol1 + column_addition, cline2 + line_addition, ccol2 + column_addition)
+  end
 
   -- push undo
   local line2, col2 = self:position_offset(line, col, #text)
   push_undo(undo_stack, time, "selection", unpack(self.selections))
   push_undo(undo_stack, time, "remove", line, col, line2, col2)
 
-  -- keep cursors where they should be
-  for idx, cline1, ccol1, cline2, ccol2 in self:get_selections(true) do
-    if cline1 >= line then 
-      local line_addition = line > cline1 or ccol1 > col and #lines - 1 or 0
-      local column_addition = line == cline1 and ccol1 > col and len or 0
-      self:set_selections(idx, cline1 + line_addition, ccol1 + column_addition, cline2 + line_addition, ccol2 + column_addition)
-    end
-  end
-
   -- update highlighter and assure selection is in bounds
   self.highlighter:invalidate(line)
   self:sanitize_selection()
@@ -355,12 +354,11 @@ function Doc:raw_remove(line1, col1, line2, col2, undo_stack, time)
   common.splice(self.lines, line1, line2 - line1 + 1, { before .. after })
   
   -- move all cursors back if they share a line with the removed text
-  for idx, cline1, ccol1, cline2, ccol2 in self:get_selections(true) do
-    if cline1 >= line2 then
-      local line_removal = line2 - line1
-      local column_removal = line2 == cline2 and col2 < ccol1 and (line2 == line1 and col2 - col1 or col2) or 0
-      self:set_selections(idx, cline1 - line_removal, ccol1 - column_removal, cline2 - line_removal, ccol2 - column_removal)
-    end
+  for idx, cline1, ccol1, cline2, ccol2 in self:get_selections(true, true) do
+    if cline1 < line2 then break end
+    local line_removal = line2 - line1
+    local column_removal = line2 == cline2 and col2 < ccol1 and (line2 == line1 and col2 - col1 or col2) or 0
+    self:set_selections(idx, cline1 - line_removal, ccol1 - column_removal, cline2 - line_removal, ccol2 - column_removal)
   end
 
   -- update highlighter and assure selection is in bounds
@@ -398,7 +396,7 @@ end
 
 
 function Doc:text_input(text, idx)
-  for sidx, line1, col1, line2, col2 in self:get_selections(true, idx) do
+  for sidx, line1, col1, line2, col2 in self:get_selections(true, idx or true) do
     if line1 ~= line2 or col1 ~= col2 then
       self:delete_to_cursor(sidx)
     end