Auto-indent should happen for each selection.

modules/textadept/editing.lua

@@ -530,16 +530,19 @@ end)
 -- Auto-indent on return.
 events.connect(events.CHAR_ADDED, function(code)
 	if not M.auto_indent or code ~= string.byte('\n') then return end
-	local line = buffer:line_from_position(buffer.current_pos)
-	if line > 1 and buffer:get_line(line - 1):find('^[\r\n]+$') and
-		buffer:get_line(line):find('^[^\r\n]') then
-		return -- do not auto-indent when pressing enter from start of previous line
-	end
-	local i = line - 1
-	while i >= 1 and buffer:get_line(i):find('^[\r\n]+$') do i = i - 1 end
-	if i >= 1 then
-		buffer.line_indentation[line] = buffer.line_indentation[i]
-		buffer:vc_home()
+	for i = 1, buffer.selections do
+		local line = buffer:line_from_position(buffer.selection_n_caret[i])
+		if line > 1 and buffer:get_line(line - 1):find('^[\r\n]+$') and
+			buffer:get_line(line):find('^[^\r\n]') then
+			return -- do not auto-indent when pressing enter from start of previous line
+		end
+		local j = line - 1
+		while j >= 1 and buffer:get_line(j):find('^[\r\n]+$') do j = j - 1 end
+		if j >= 1 then
+			buffer.line_indentation[line] = buffer.line_indentation[j]
+			local indent_pos = buffer.line_indent_position[line]
+			buffer.selection_n_start[i], buffer.selection_n_end[i] = indent_pos, indent_pos
+		end
 	end
 end)
 

modules/textadept/editing_test.lua

@@ -729,6 +729,25 @@ test('editing.auto_indent should not auto-indent an already indented line', func
 	test.assert_equal(indent, buffer.tab_width)
 end)
 
+test('editing.auto_indent should auto-indent for each selection', function()
+	local indented_word = '\tword'
+	buffer:append_text(test.lines{indented_word, indented_word})
+	buffer:set_selection(buffer.line_end_position[1], buffer.line_end_position[1])
+	buffer:add_selection(buffer.line_end_position[2], buffer.line_end_position[2])
+
+	test.type('\n')
+
+	test.assert_equal(buffer:get_text(), test.lines{indented_word, '\t', indented_word, '\t'})
+	test.assert_equal(2, buffer.selections)
+	test.assert_equal(4, buffer.line_count)
+	test.assert_equal(buffer.line_indentation[2], buffer.line_indentation[1])
+	test.assert_equal(buffer.line_indentation[4], buffer.line_indentation[3])
+	test.assert_equal(buffer.selection_n_start[1], buffer.line_indent_position[2])
+	test.assert_equal(buffer.selection_n_end[1], buffer.line_indent_position[2])
+	test.assert_equal(buffer.selection_n_start[2], buffer.line_indent_position[4])
+	test.assert_equal(buffer.selection_n_end[2], buffer.line_indent_position[4])
+end)
+
 test('editing.auto_enclose should wrap selections in typed punctuation', function()
 	local _<close> = test.mock(textadept.editing, 'auto_enclose', true)
 	local word = 'word'