patch 8.2.1809: mapping some keys with Ctrl does not work properly
Problem: Mapping some keys with Ctrl does not work properly.
Solution: For terminal, GTK and Motif handle "@", "^" and "_" codes.
diff --git a/src/misc2.c b/src/misc2.c
index 3781dd8..b69714a 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -2947,6 +2947,32 @@
/*
+ * Some keys are used with Ctrl without Shift and are still expected to be
+ * mapped as if Shift was pressed:
+ * CTRL-2 is CTRL-@
+ * CTRL-6 is CTRL-^
+ * CTRL-- is CTRL-_
+ * Also, <C-H> and <C-h> mean the same thing, always use "H".
+ * Returns the possibly adjusted key.
+ */
+ int
+may_adjust_key_for_ctrl(int modifiers, int key)
+{
+ if (modifiers & MOD_MASK_CTRL)
+ {
+ if (ASCII_ISALPHA(key))
+ return TOUPPER_ASC(key);
+ if (key == '2')
+ return '@';
+ if (key == '6')
+ return '^';
+ if (key == '-')
+ return '_';
+ }
+ return key;
+}
+
+/*
* Some keys already have Shift included, pass them as normal keys.
* Not when Ctrl is also used, because <C-H> and <C-S-H> are different.
* Also for <A-S-a> and <M-S-a>.