add option to export gcode as a zip file with discrete operations

src/kiri-mode/cam/export.js

@@ -22,6 +22,7 @@
             time = 0,
             lines = 0,
             bytes = 0,
+            opnum = 0,
             factor = 1,
             output = [],
             spindle = 0,
@@ -70,10 +71,14 @@
                 time_sec: 0,
                 time_ms: 0,
                 time: 0
-            },
-            append;
+            }
 
-        append = function(line) {
+        function section(section) {
+            append();
+            online({ section });
+        }
+
+        function append(line) {
             if (line) {
                 lines++;
                 bytes += line.length;
@@ -83,7 +88,7 @@
                 online(output.join("\r\n"));
                 output = [];
             }
-        };
+        }
 
         function filterEmit(array, consts) {
             if (!array) return;
@@ -234,6 +239,7 @@
             points++;
         }
 
+        section('header');
         if (!stripComments) {
             append(`; Generated by Kiri:Moto ${KIRI.version}`);
             append(`; ${new Date().toString()}`);
@@ -291,6 +297,7 @@
             if (mode !== layerout.mode) {
                 if (mode && !stripComments) append("; ending " + mode + " op after " + Math.round(time/60) + " seconds");
                 mode = layerout.mode;
+                if (mode) section(`op-${opnum++}-${mode}`);
                 if (!stripComments) append("; starting " + mode + " op");
             }
             if (layerout.spindle && layerout.spindle !== spindle) {
@@ -312,6 +319,7 @@
         if (mode && !stripComments) append("; ending " + mode + " op after " + Math.round(time/60) + " seconds");
 
         // emit gcode post
+        section('footer');
         filterEmit(gcodes.gcodePost, consts);
 
         // flush buffered gcode