src/lib/cwl-svg/plugins/deletion/deletion.ts

   1 import {PluginBase} from "../plugin-base";
   2 import {SelectionPlugin} from "../selection/selection";
   3 import {StepModel, WorkflowInputParameterModel, WorkflowOutputParameterModel} from "cwlts/models";
   4
   5 export class DeletionPlugin extends PluginBase {
   6
   7     private boundDeleteFunction = this.onDelete.bind(this);
   8
   9     afterRender(): void {
  10         this.attachDeleteBehavior();
  11     }
  12
  13     onEditableStateChange(enable: boolean) {
  14         if (enable) {
  15             this.attachDeleteBehavior();
  16         } else {
  17             this.detachDeleteBehavior();
  18         }
  19     }
  20
  21     private attachDeleteBehavior() {
  22
  23         this.detachDeleteBehavior();
  24         window.addEventListener("keyup", this.boundDeleteFunction, true);
  25     }
  26
  27     private detachDeleteBehavior() {
  28         window.removeEventListener("keyup", this.boundDeleteFunction, true);
  29     }
  30
  31     private onDelete(ev: KeyboardEvent) {
  32         if ((ev.which !== 8 && ev.which !== 46) || !(ev.target instanceof SVGElement)) {
  33             return;
  34         }
  35
  36         this.deleteSelection();
  37     }
  38
  39     public deleteSelection() {
  40         const selection = this.workflow.getPlugin(SelectionPlugin);
  41
  42         if (!selection || !this.workflow.editingEnabled) {
  43             return;
  44         }
  45
  46         const selected = selection.getSelection();
  47         selected.forEach((type, id) => {
  48             if (type === "node") {
  49                 const model = this.workflow.model.findById(id);
  50
  51                 if (model instanceof StepModel) {
  52                     this.workflow.model.removeStep(model);
  53                     selection.clearSelection();
  54
  55                 } else if (model instanceof WorkflowInputParameterModel) {
  56                     this.workflow.model.removeInput(model);
  57                     selection.clearSelection();
  58
  59                 } else if (model instanceof WorkflowOutputParameterModel) {
  60
  61                     this.workflow.model.removeOutput(model);
  62                     selection.clearSelection();
  63                 }
  64             } else {
  65                 const [source, destination] = id.split(SelectionPlugin.edgePortsDelimiter);
  66                 this.workflow.model.disconnect(source, destination);
  67                 selection.clearSelection();
  68             }
  69         });
  70     }
  71
  72     destroy() {
  73         this.detachDeleteBehavior();
  74     }
  75 }