From 8866bc889d7a0f9b712a3e49d6a16ddf56729233 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sat, 24 Nov 2018 22:49:45 +0100
Subject: [PATCH] string editor now may restrict the available keys

---
 dialogs.cpp | 16 ++++++++++++----
 hyper.h     |  3 ++-
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/dialogs.cpp b/dialogs.cpp
index dd5cfe8b..9622fa08 100644
--- a/dialogs.cpp
+++ b/dialogs.cpp
@@ -989,9 +989,15 @@ namespace dialog {
     edited_string = &s;
     editpos = isize(s);
     }
+  
+  string editchecker(int sym, int uni) {
+    if(uni >= 32 && uni < 127) return string("") + char(uni);
+    return "";
+    }
 
-  bool handle_edit_string(int sym, int uni) {
+  bool handle_edit_string(int sym, int uni, function<string(int, int)> checker) {
     auto& es = *edited_string;
+    string u2;
     if(sym == SDLK_LEFT) editpos--;
     else if(sym == SDLK_RIGHT) editpos++;
     else if(uni == 8) {
@@ -999,9 +1005,11 @@ namespace dialog {
       es.replace(editpos-1, 1, "");
       editpos--;
       }
-    else if(uni >= 32 && uni < 128) {
-      es.insert(editpos, 1, uni);
-      editpos++;
+    else if((u2 = checker(sym, uni)) != "") {
+      for(char c: u2) {
+        es.insert(editpos, 1, c);
+        editpos ++;
+        }
       }
     else return false;
     return true;
diff --git a/hyper.h b/hyper.h
index ee4c9c8d..4f1afa7e 100644
--- a/hyper.h
+++ b/hyper.h
@@ -1842,7 +1842,8 @@ namespace dialog {
   
   string view_edited_string();
   void start_editing(string& s);
-  bool handle_edit_string(int sym, int uni);
+  string editchecker(int sym, int uni);
+  bool handle_edit_string(int sym, int uni, function<string(int, int)> checker = editchecker);
   void edit_string(string& s, string title, string help);
   }