Moved auto-indent from core/events.lua to modules/textadept/editing.lua.

1 files changed, 27 insertions, 0 deletions

diff --git a/modules/textadept/editing.lua b/modules/textadept/editing.lua
index 972b52d8..2d10b56e 100644
--- a/modules/textadept/editing.lua
+++ b/modules/textadept/editing.lua
@@ -75,6 +75,33 @@ textadept.events.add_handler('char_added',
     if char_matches[c] then buffer:insert_text(-1, char_matches[c]) end
   end)
 
+textadept.events.add_handler('char_added',
+  function(char) -- auto-indent on return
+    if char ~= '\n' then return end
+    local buffer = buffer
+    local anchor, caret = buffer.anchor, buffer.current_pos
+    local curr_line = buffer:line_from_position(caret)
+    local last_line = curr_line - 1
+    while last_line >= 0 and #buffer:get_line(last_line) == 1 do
+      last_line = last_line - 1
+    end
+    if last_line >= 0 then
+      local indentation = buffer.line_indentation[last_line]
+      local s = buffer.line_indent_position[curr_line]
+      buffer.line_indentation[curr_line] = indentation
+      local e = buffer.line_indent_position[curr_line]
+      local diff = e - s
+      if e > s then -- move selection on
+        if anchor >= s then anchor = anchor + diff end
+        if caret  >= s then caret  = caret  + diff end
+      elseif e < s then -- move selection back
+        if anchor >= e then anchor = anchor >= s and anchor + diff or e end
+        if caret  >= e then caret  = caret  >= s and caret  + diff or e end
+      end
+      buffer:set_sel(anchor, caret)
+    end
+  end)
+
 -- local functions
 local insert_into_kill_ring, scroll_kill_ring
 local get_preceding_number, get_sel_or_line