Update 'src/app/core/drawers/stage.js'

Some fixes to allow the MidPoint creation through GEO file with the correct ID
(e.g. one with "1:3" was been created with ID=1)
Added iGeom header
Indentation improvements

src/app/core/drawers/stage.js

@@ -1,48 +1,68 @@
+/*
+ * iGeom by LInE
+ * Free software to student private data
+ *
+ * http://www.matematica.br/igeom
+ * http://www.usp.br/line
+ *
+ * ./app/core/drawers/stage.js
+ * @version 2023/01/27
+ */
+
 import { app as App } from "../../app";
 import { Layer } from "../drawers/layer";
 import { APP_STATE } from "../enums/app-state-enum";
 import { ELEMENTS_CLASS } from "../enums/elements-class-enum";
+
 export class Stage {
-  constructor() {
+
+  constructor () {
     this.layers = [];
     this.layer;
-    this.konvaStage;
-    this._bootstrap();
-  }
-  addAggregator(aggregator) {
+    this.konvaStage; 
+   this._bootstrap();
+    }
+
+  addAggregator (aggregator) {
     this.layer.addAggregator(aggregator);
-  }
-  setKonvaStage(stage) {
+    }
+
+  setKonvaStage (stage) {
     this.konvaStage = stage;
     this.configureStageEvents(this.konvaStage);
-  }
-  createLayer() {
+    }
+
+  createLayer () {
     let sequence = 0;
     if (this.layers == null || this.layers.length == 0) {
       sequence++;
     } else {
       sequence = this.layers.length + 1;
-    }
+      }
     const layer = new Layer(sequence, new Konva.Layer());
     this.layers.push(layer);
     if (this.getCurrentLayer() == undefined && this.layers.length == 0) {
       this.layers = [];
       this.layers.push(layer);
-    }
+      }
     this.layer = layer;
     this.konvaStage.add(this.layer.konvaLayer);
     return layer;
-  }
-  setCurrentLayer(layer) {
+    }
+
+  setCurrentLayer (layer) {
     this.layer = layer;
-  }
-  getCurrentLayer() {
+    }
+
+  getCurrentLayer () {
     return this.layer;
-  }
-  getCurrentKonvaLayer() {
+    }
+
+  getCurrentKonvaLayer () {
     return this.layer.getKonvaLayer();
-  }
-  draw(object) {
+    }
+
+  draw (object) {
     if (object == undefined) this.konvaStage.draw();
     else {
       let layer = this.layer.getKonvaLayer();
@@ -50,21 +70,23 @@ export class Stage {
       layer.draw();
       this.konvaStage.draw(layer);
       this.konvaStage.draw();
+      }
     }
-  }
-  _setState(state) {
+
+  _setState (state) {
     App.setState(state);
-  }
-  configureStageEvents(stage) {
+    }
+
+  configureStageEvents (stage) {
     stage.on("mousedown ", this._mouseDown.bind(this));
     stage.on("click", this._clickTap.bind(this));
-  }
+    }
 
-  _mouseDown(e) {
+  _mouseDown (e) {
     if (e.target === this.konvaStage) {
       this._setState(APP_STATE.NONE);
       return;
-    }
+      }
     if (e.target.id != undefined) {
       if (
         e.target.attrs != undefined &&
@@ -73,22 +95,23 @@ export class Stage {
         this._setState(APP_STATE.OBJECT_SELECTED);
       } else {
         this._setState(APP_STATE.NONE);
-      }
+        }
       return;
+      }
     }
-  }
 
-  _clickTap(e) {
+  _clickTap (e) {
     const tool = App.getSelectedTool();
     if (tool != undefined) {
       tool.draw.bind(tool)(e);
       return;
-    }
+      }
     if (e.target === this.konvaStage) {
       this._setState(APP_STATE.NONE);
       return;
+      }
     }
-  }
 
-  _bootstrap() { }
-}
+  _bootstrap () { }
+
+  }