ctrl+c, ctrl+d support

editor.nim

@@ -26,6 +26,9 @@ type
     cols: int # number of columns in the terminal
     maxRows: int # max number of rows allowed
 
+  EditorResult* = enum
+    erEnter, erCtrlC, erCtrlD, erError
+
 # for editors
 var editors: seq[EditorState]
 
@@ -56,12 +59,18 @@ proc render(ed: EditorState) =
 template cline(ed: EditorState): var string =
   ed.buffer[ed.y]
 
-proc read*(ed: EditorState): string =
+
+
+proc read*(ed: EditorState): (EditorResult, string) =
+
+  var editorResult = erError
+
   ed.render()
   while true:
     let key = getKey()
     case key:
     of jkEnter.int:
+      editorResult = erEnter
       break
     of jkBackspace.int:
       if ed.x == 0:
@@ -75,6 +84,13 @@ proc read*(ed: EditorState): string =
         ed.cline() = ed.cline[0..ed.x-1] & ed.cline[ed.x+1..ed.cline().high()]
         dec ed.x
         dec ed.bx
+    of 3: # ctrl+c
+      editorResult = erCtrlC
+      break
+    of 4: # ctrl+d
+      if ed.buffer.len() <= 1 and ed.cline().len() == 0:
+        editorResult = erCtrlD
+        break
     else:
       if key > 31 and key < 127:
         # ascii char
@@ -91,7 +107,7 @@ proc read*(ed: EditorState): string =
     ed.render()
   
   # return val
-  result = ed.buffer.join("\n")
+  result = (editorResult, ed.buffer.join("\n"))
 
   # cleanup
   write(stdout, "\n")

example.nim

@@ -3,7 +3,7 @@ import editor
 let e = newEditor("> ", false)
 
 while true:
-  let text = e.read()
-  if text == "quit":
+  let (res, text) = e.read()
+  if res in {erCtrlC, erCtrlD} or text == "quit":
     break
   echo text