Merge pull request #31 from ProjectMirador/show-anno-companionwindow

Always make sure the annotation side bar button is present

src/index.js

@@ -2,10 +2,12 @@ import miradorAnnotationPlugin from './plugins/miradorAnnotationPlugin';
 import externalStorageAnnotationPlugin from './plugins/externalStorageAnnotationPlugin';
 import canvasAnnotationsPlugin from './plugins/canvasAnnotationsPlugin';
 import annotationCreationCompanionWindow from './plugins/annotationCreationCompanionWindow';
+import windowSideBarButtonsPlugin from './plugins/windowSideBarButtonsPlugin';
 
 export {
   miradorAnnotationPlugin, externalStorageAnnotationPlugin,
   canvasAnnotationsPlugin, annotationCreationCompanionWindow,
+  windowSideBarButtonsPlugin,
 };
 
 export default [
@@ -13,4 +15,5 @@ export default [
   externalStorageAnnotationPlugin,
   canvasAnnotationsPlugin,
   annotationCreationCompanionWindow,
+  windowSideBarButtonsPlugin,
 ];

src/plugins/windowSideBarButtonsPlugin.js

+import React, { Component } from 'react';
+import PropTypes from 'prop-types';
+
+/**
+ * A wrapper plugin that sets hasAnyAnnotations to true so that the annotation
+ * companion window button is present
+ */
+class WindowSideBarButtonWrapper extends Component {
+  /** */
+  render() {
+    const { PluginComponents, TargetComponent, targetProps } = this.props;
+    targetProps.hasAnyAnnotations = true;
+    return (
+      <TargetComponent
+        {...targetProps} // eslint-disable-line react/jsx-props-no-spreading
+        PluginComponents={PluginComponents}
+      />
+    );
+  }
+}
+
+WindowSideBarButtonWrapper.propTypes = {
+  PluginComponents: PropTypes.array, // eslint-disable-line react/forbid-prop-types
+  TargetComponent: PropTypes.oneOfType([
+    PropTypes.func,
+    PropTypes.node,
+  ]).isRequired,
+  targetProps: PropTypes.object.isRequired, // eslint-disable-line react/forbid-prop-types
+};
+
+WindowSideBarButtonWrapper.defaultProps = {
+  PluginComponents: [],
+};
+
+export default {
+  component: WindowSideBarButtonWrapper,
+  mode: 'wrap',
+  target: 'WindowSideBarButtons',
+};