Display message to indicate no selected source in Outline tab (#5266) (#5506)

* Display message to indicate no selected source in Outline tab (#5266)

* Fix incorrect comment

* Use the positive conditional in the ternary

Author: Bilie

assets/panel/debugger.properties

@@ -556,6 +556,9 @@ outline.header=Outline
 # LOCALIZATION NOTE (outline.noFunctions): Outline text when there are no functions to display
 outline.noFunctions=No functions
 
+# LOCALIZATION NOTE (outline.noFileSelected): Outline text when there are no files selected
+outline.noFileSelected=No file selected
+
 # LOCALIZATION NOTE (sources.search): Sources left sidebar prompt
 # e.g. Cmd+P to search. On a mac, we use the command unicode character.
 # On windows, it's ctrl.

src/components/PrimaryPanes/Outline.js

@@ -38,11 +38,11 @@ export class Outline extends Component<Props> {
   }
 
   renderPlaceholder() {
-    return (
-      <div className="outline-pane-info">
-        {L10N.getStr("outline.noFunctions")}
-      </div>
-    );
+    const placeholderMessage = this.props.selectedSource
+      ? L10N.getStr("outline.noFunctions")
+      : L10N.getStr("outline.noFileSelected");
+
+    return <div className="outline-pane-info">{placeholderMessage}</div>;
   }
 
   renderFunction(func: SymbolDeclaration) {

yarn.lock

@@ -3882,9 +3882,9 @@ eslint-plugin-jest@^21.5.0:
   version "21.7.0"
   resolved "https://registry.yarnpkg.com/eslint-plugin-jest/-/eslint-plugin-jest-21.7.0.tgz#651f1c6ce999af3ac59ab8bf8a376d742fd0fc23"
 
-[email protected]:
-  version "0.9.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-mozilla/-/eslint-plugin-mozilla-0.9.0.tgz#1c924e585b1a6272206e181b8e5522f0dd663cd0"
+eslint-plugin-mozilla@^0.9.0:
+  version "0.9.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-mozilla/-/eslint-plugin-mozilla-0.9.1.tgz#af77cb5f9d2bc3a403c201c858902caacf8c1f7c"
   dependencies:
     ini-parser "0.0.2"
     sax "1.2.4"