patch 7.4.849
Problem: Moving the cursor in Insert mode starts new undo sequence.
Solution: Add CTRL-G U to keep the undo sequence for the following cursor
movement command. (Christian Brabandt)
diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index 0aa989c..b0eae9f 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -377,6 +377,9 @@
CTRL-\ CTRL-O like CTRL-O but don't move the cursor *i_CTRL-\_CTRL-O*
CTRL-L when 'insertmode' is set: go to Normal mode *i_CTRL-L*
CTRL-G u break undo sequence, start new change *i_CTRL-G_u*
+CTRL-G U don't break undo with next left/right cursor *i_CTRL-G_U*
+ movement (but only if the cursor stays
+ within same the line)
-----------------------------------------------------------------------
Note: If the cursor keys take you out of Insert mode, check the 'noesckeys'
@@ -416,6 +419,28 @@
This breaks undo at each line break. It also expands abbreviations before
this.
+An example for using CTRL-G U: >
+
+ inoremap <Left> <C-G>U<Left>
+ inoremap <Right> <C-G>U<Right>
+ inoremap <expr> <Home> col('.') == match(getline('.'), '\S') + 1 ?
+ \ repeat('<C-G>U<Left>', col('.') - 1) :
+ \ (col('.') < match(getline('.'), '\S') ?
+ \ repeat('<C-G>U<Right>', match(getline('.'), '\S') + 0) :
+ \ repeat('<C-G>U<Left>', col('.') - 1 - match(getline('.'), '\S')))
+ inoremap <expr> <End> repeat('<C-G>U<Right>', col('$') - col('.'))
+ inoremap ( ()<C-G>U<Left>
+
+This makes it possible to use the cursor keys in Insert mode, without breaking
+the undo sequence and therefore using |.| (redo) will work as expected.
+Also entering a text like (with the "(" mapping from above): >
+
+ Lorem ipsum (dolor
+
+will be repeatable by the |.|to the expected
+
+ Lorem ipsum (dolor)
+
Using CTRL-O splits undo: the text typed before and after it is undone
separately. If you want to avoid this (e.g., in a mapping) you might be able
to use CTRL-R = |i_CTRL-R|. E.g., to call a function: >