Improved prompting

UCRTHelper.pas

@@ -0,0 +1,64 @@
+unit UCRTHelper;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, crt;
+
+type
+  TPromptMode = (pmNormal, pmPassword);
+
+function Prompt(ACaption: String; AMode: TPromptMode = pmNormal): String; overload;
+function Prompt(ACaption, ADefault: String; AMode: TPromptMode = pmNormal): String; overload;
+
+implementation
+
+function Prompt(ACaption: String; AMode: TPromptMode): String;
+begin
+  Prompt(ACaption, '', AMode);
+end;
+
+function Prompt(ACaption, ADefault: String; AMode: TPromptMode): String;
+var
+  c: Char;
+begin
+  Write(ACaption);
+  if ADefault <> '' then
+    Write(' [', ADefault, ']');
+  Write(': ');
+
+  Result := '';
+  repeat
+    c := ReadKey;
+    if (c = #8) and (Length(Result) > 0) then
+    begin
+      Write(#8, ' ', #8);
+    end
+    else if c > #31 then
+    begin
+      Result := Result + c;
+
+      case AMode of
+        pmNormal: Write(c);
+        pmPassword: Write('*');
+      end;
+    end;
+  until (c = #13) or (c = ^C);
+
+  if (c = #13) and (Result = '') then
+  begin
+    Result := ADefault;
+    Write(ADefault);
+  end;
+
+  if c = #13 then
+    Writeln;
+
+  if c = ^C then
+    Result := ''; //Pretend that nothing happened.
+end;
+
+end.
+

restemplate.lpi

@@ -55,11 +55,15 @@
         <FormatVersion Value="1"/>
       </local>
     </RunParams>
-    <Units Count="1">
+    <Units Count="2">
       <Unit0>
         <Filename Value="restemplate.pas"/>
         <IsPartOfProject Value="True"/>
       </Unit0>
+      <Unit1>
+        <Filename Value="UCRTHelper.pas"/>
+        <IsPartOfProject Value="True"/>
+      </Unit1>
     </Units>
   </ProjectOptions>
   <CompilerOptions>

restemplate.pas

@@ -28,7 +28,7 @@ uses
   JTemplate,
   fpjson, jsonparser,
   DOM, XMLRead, XMLWrite,
-  RegExpr, crt;
+  RegExpr, crt, UCRTHelper;
 
 type
   TContentType = (ctOther, ctJSON, ctXML);
@@ -112,17 +112,11 @@ procedure CmdAskUser(AName: String);
 var
   value, default: String;
 begin
-  Write(AName);
   default := sessionIni.ReadString(templateName, AName, '');
-  if default <> '' then
-    Write(' [', default, ']: ')
-  else
-    Write(': ');
-
-  ReadLn(value);
+  value := Prompt(AName, default);
 
   if value = '' then
-    value := default;
+    Halt(3); //Cancelled
 
   parser.Fields.Add(AName, value);