Create text viewer

Created a text blob viewer

app/assets/javascripts/repository/components/blob_content_viewer.vue

@@ -11,7 +11,7 @@ import { __ } from '~/locale';
 import blobInfoQuery from '../queries/blob_info.query.graphql';
 import BlobButtonGroup from './blob_button_group.vue';
 import BlobEdit from './blob_edit.vue';
-import { loadViewer } from './blob_viewers';
+import { loadViewer, viewerProps } from './blob_viewers';
 
 export default {
   components: {
@@ -31,12 +31,12 @@ export default {
         };
       },
       result() {
-        if (this.hasRichViewer && !this.blobViewer) {
-          this.loadLegacyViewer();
-        }
         this.switchViewer(
           this.hasRichViewer && !window.location.hash ? RICH_BLOB_VIEWER : SIMPLE_BLOB_VIEWER,
         );
+        if (this.hasRichViewer && !this.blobViewer) {
+          this.loadLegacyViewer();
+        }
       },
       error() {
         this.displayError();
@@ -123,6 +123,10 @@ export default {
       const { fileType } = this.viewer;
       return loadViewer(fileType);
     },
+    viewerProps() {
+      const { fileType } = this.viewer;
+      return viewerProps(fileType, this.blobInfo);
+    },
   },
   methods: {
     loadLegacyViewer() {
@@ -181,7 +185,7 @@ export default {
         :active-viewer="viewer"
         :loading="false"
       />
-      <component :is="blobViewer" v-else class="blob-viewer" />
+      <component :is="blobViewer" v-else v-bind="viewerProps" class="blob-viewer" />
     </div>
   </div>
 </template>

app/assets/javascripts/repository/components/blob_viewers/index.js

@@ -4,8 +4,7 @@ export const loadViewer = (type) => {
       // TODO (follow-up): import the empty viewer
       return null; // () => import(/* webpackChunkName: 'blob_empty_viewer' */ './empty_viewer.vue');
     case 'text':
-      // TODO (follow-up): import the text viewer
-      return null; // () => import(/* webpackChunkName: 'blob_text_viewer' */ './text_viewer.vue');
+      return () => import(/* webpackChunkName: 'blob_text_viewer' */ './text_viewer.vue');
     case 'download':
       // TODO (follow-up): import the download viewer
       return null; // () => import(/* webpackChunkName: 'blob_download_viewer' */ './download_viewer.vue');
@@ -13,3 +12,13 @@ export const loadViewer = (type) => {
       return null;
   }
 };
+
+export const viewerProps = (type, blob) => {
+  return {
+    text: {
+      content: blob.rawTextBlob,
+      fileName: blob.name,
+      readOnly: true,
+    },
+  }[type];
+};

app/assets/javascripts/repository/components/blob_viewers/text_viewer.vue

+<script>
+export default {
+  components: {
+    SourceEditor: () =>
+      import(/* webpackChunkName: 'SourceEditor' */ '~/vue_shared/components/source_editor.vue'),
+  },
+  props: {
+    content: {
+      type: String,
+      required: true,
+    },
+    fileName: {
+      type: String,
+      required: true,
+    },
+    readOnly: {
+      type: Boolean,
+      required: true,
+    },
+  },
+};
+</script>
+<template>
+  <source-editor :value="content" :file-name="fileName" :editor-options="{ readOnly }" />
+</template>

spec/frontend/repository/components/blob_content_viewer_spec.js

@@ -11,7 +11,8 @@ import BlobHeader from '~/blob/components/blob_header.vue';
 import BlobButtonGroup from '~/repository/components/blob_button_group.vue';
 import BlobContentViewer from '~/repository/components/blob_content_viewer.vue';
 import BlobEdit from '~/repository/components/blob_edit.vue';
-import { loadViewer } from '~/repository/components/blob_viewers';
+import { loadViewer, viewerProps } from '~/repository/components/blob_viewers';
+import TextViewer from '~/repository/components/blob_viewers/text_viewer.vue';
 import blobInfoQuery from '~/repository/queries/blob_info.query.graphql';
 
 jest.mock('~/repository/components/blob_viewers');
@@ -113,6 +114,7 @@ describe('Blob content viewer component', () => {
   const findBlobEdit = () => wrapper.findComponent(BlobEdit);
   const findBlobContent = () => wrapper.findComponent(BlobContent);
   const findBlobButtonGroup = () => wrapper.findComponent(BlobButtonGroup);
+  const findTextViewer = () => wrapper.findComponent(TextViewer);
 
   afterEach(() => {
     wrapper.destroy();
@@ -222,6 +224,15 @@ describe('Blob content viewer component', () => {
 
       expect(findBlobContent().exists()).toBe(false);
     });
+
+    it('renders a TextViewer for text files', () => {
+      loadViewer.mockReturnValueOnce(TextViewer);
+      viewerProps.mockReturnValueOnce({ content: 'test', fileName: 'test.js', readOnly: true });
+
+      factory({ mockData: { blobInfo: simpleMockData } });
+
+      expect(findTextViewer().exists()).toBe(true);
+    });
   });
 
   describe('BlobHeader action slot', () => {

spec/frontend/repository/components/blob_viewers/text_viewer_spec.js

+import { shallowMount } from '@vue/test-utils';
+import waitForPromises from 'helpers/wait_for_promises';
+import TextViewer from '~/repository/components/blob_viewers/text_viewer.vue';
+import SourceEditor from '~/vue_shared/components/source_editor.vue';
+
+describe('Text Viewer', () => {
+  let wrapper;
+  const propsData = {
+    content: 'Some content',
+    fileName: 'file_name.js',
+    readOnly: true,
+  };
+
+  const createComponent = () => {
+    wrapper = shallowMount(TextViewer, { propsData });
+  };
+
+  const findEditor = () => wrapper.findComponent(SourceEditor);
+
+  it('renders a Source Editor component', async () => {
+    createComponent();
+
+    await waitForPromises();
+
+    expect(findEditor().exists()).toBe(true);
+    expect(findEditor().props('value')).toBe(propsData.content);
+    expect(findEditor().props('fileName')).toBe(propsData.fileName);
+    expect(findEditor().props('editorOptions')).toEqual({ readOnly: propsData.readOnly });
+  });
+});