From 7dcc885a7acd673980478318da12468716e7d10f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Wed, 11 Nov 2020 18:26:47 +0100
Subject: [PATCH] =?UTF-8?q?csi:=20implement=20=E2=80=9CCSI=20=3F=201035?=
 =?UTF-8?q?=E2=80=9D=20-=20toggle=20Num=20Lock=20override?=
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This adds a num_lock_modifier state to the terminal, and hooks up
“CSI?1035h/l” to toggle it.
---
 csi.c      | 8 ++++++++
 terminal.c | 1 +
 terminal.h | 3 +++
 3 files changed, 12 insertions(+)

diff --git a/csi.c b/csi.c
index 7c4d5077..c86f39c1 100644
--- a/csi.c
+++ b/csi.c
@@ -465,6 +465,12 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
         term->meta.eight_bit = enable;
         break;
 
+    case 1035:
+        /* numLock */
+        LOG_DBG("%s Num Lock modifier", enable ? "enabling" : "disabling");
+        term->num_lock_modifier = enable;
+        break;
+
     case 1036:
         /* metaSendsEscape */
         LOG_DBG("%s meta-sends-escape", enable ? "enabling" : "disabling");
@@ -586,6 +592,7 @@ xtsave(struct terminal *term, unsigned param)
     case 1007: term->xtsave.alt_scrolling = term->alt_scrolling; break;
     case 1015: term->xtsave.mouse_urxvt = term->mouse_reporting == MOUSE_URXVT; break;
     case 1034: term->xtsave.meta_eight_bit = term->meta.eight_bit; break;
+    case 1035: term->xtsave.num_lock_modifier = term->num_lock_modifier; break;
     case 1036: term->xtsave.meta_esc_prefix = term->meta.esc_prefix; break;
     case 1049: term->xtsave.alt_screen = term->grid == &term->alt; break;
     case 2004: term->xtsave.bracketed_paste = term->bracketed_paste; break;
@@ -616,6 +623,7 @@ xtrestore(struct terminal *term, unsigned param)
     case 1007: enable = term->xtsave.alt_scrolling; break;
     case 1015: enable = term->xtsave.mouse_urxvt; break;
     case 1034: enable = term->xtsave.meta_eight_bit; break;
+    case 1035: enable = term->xtsave.num_lock_modifier; break;
     case 1036: enable = term->xtsave.meta_esc_prefix; break;
     case 1049: enable = term->xtsave.alt_screen; break;
     case 2004: enable = term->xtsave.bracketed_paste; break;
diff --git a/terminal.c b/terminal.c
index 4651fc1a..bb986c0c 100644
--- a/terminal.c
+++ b/terminal.c
@@ -995,6 +995,7 @@ term_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
             .esc_prefix = true,
             .eight_bit = true,
         },
+        .num_lock_modifier = true,
         .tab_stops = tll_init(),
         .wl = wayl,
         .render = {
diff --git a/terminal.h b/terminal.h
index eede87c1..c8c62966 100644
--- a/terminal.h
+++ b/terminal.h
@@ -250,6 +250,8 @@ struct terminal {
         bool eight_bit;
     } meta;
 
+    bool num_lock_modifier;
+
     /* Saved DECSET modes - we save the SET state */
     struct {
         uint32_t origin:1;
@@ -270,6 +272,7 @@ struct terminal {
         uint32_t mouse_urxvt:1;
         uint32_t meta_eight_bit:1;
         uint32_t meta_esc_prefix:1;
+        uint32_t num_lock_modifier:1;
         uint32_t alt_screen:1;
     } xtsave;