feat: make signature-help text selectable and copyable

Author: aminya

lib/signature-help-manager.js

@@ -5,6 +5,7 @@
 const { CompositeDisposable, Disposable, Range, Point, TextEditor } = require("atom")
 import { ProviderRegistry } from "atom-ide-base/commons-atom/ProviderRegistry"
 import { ViewContainer } from "atom-ide-base/commons-ui/float-pane/ViewContainer"
+import { makeOverlaySelectable, makeOverLayCopyable } from "atom-ide-base/commons-ui/float-pane/selectable-overlay"
 
 module.exports = class SignatureHelpManager {
   constructor() {
@@ -294,6 +295,9 @@ module.exports = class SignatureHelpManager {
       invalidate: "overlap", // TODO It was never. Shouldn't be surround?
     })
 
+    makeOverlaySelectable(editor, view.element)
+    makeOverLayCopyable(view.element)
+
     const marker = editor.decorateMarker(overlayMarker, {
       type: "overlay",
       class: "signature-overlay",

styles/atom-ide-signature-help.less

@@ -10,9 +10,12 @@
   margin-top: -2px; // Compensate for shadow
   position: relative;
   white-space: nowrap;
+
+  user-select: text;
   pointer-events: all;
+
   display: block;
-  visibility: hidden;
+  visibility: hidden; // controlled by js
 
   padding: 5px 5px 2px 5px;