Replaced part of diff file properties with diff viewer

- replaced file.too_large
- replaced file.text
- replaced file.collapsed

11 files changed, 118 insertions, 68 deletions

diff --git a/app/assets/javascripts/diffs/components/diff_content.vue b/app/assets/javascripts/diffs/components/diff_content.vue
index 6dc2f5d3f68..cb92093db32 100644
--- a/app/assets/javascripts/diffs/components/diff_content.vue
+++ b/app/assets/javascripts/diffs/components/diff_content.vue
@@ -1,7 +1,8 @@
 <script>
 import { mapActions, mapGetters, mapState } from 'vuex';
 import DiffViewer from '~/vue_shared/components/diff_viewer/diff_viewer.vue';
-import EmptyFileViewer from '~/vue_shared/components/diff_viewer/viewers/empty_file.vue';
+import NotDiffableViewer from '~/vue_shared/components/diff_viewer/viewers/not_diffable.vue';
+import NoPreviewViewer from '~/vue_shared/components/diff_viewer/viewers/no_preview.vue';
 import InlineDiffView from './inline_diff_view.vue';
 import ParallelDiffView from './parallel_diff_view.vue';
 import NoteForm from '../../notes/components/note_form.vue';
@@ -9,6 +10,7 @@ import ImageDiffOverlay from './image_diff_overlay.vue';
 import DiffDiscussions from './diff_discussions.vue';
 import { IMAGE_DIFF_POSITION_TYPE } from '../constants';
 import { getDiffMode } from '../store/utils';
+import { diffViewerModes } from '~/ide/constants';
 
 export default {
   components: {
@@ -18,7 +20,8 @@ export default {
     NoteForm,
     DiffDiscussions,
     ImageDiffOverlay,
-    EmptyFileViewer,
+    NotDiffableViewer,
+    NoPreviewViewer,
   },
   props: {
     diffFile: {
@@ -42,11 +45,17 @@ export default {
     diffMode() {
       return getDiffMode(this.diffFile);
     },
+    diffViewerMode() {
+      return this.diffFile.viewer.name;
+    },
     isTextFile() {
-      return this.diffFile.viewer.name === 'text';
+      return this.diffViewerMode === diffViewerModes.text;
+    },
+    noPreview() {
+      return this.diffViewerMode === diffViewerModes.no_preview;
     },
-    errorMessage() {
-      return this.diffFile.viewer.error;
+    notDiffable() {
+      return this.diffViewerMode === diffViewerModes.not_diffable;
     },
     diffFileCommentForm() {
       return this.getCommentFormForDiffFile(this.diffFile.file_hash);
@@ -78,11 +87,10 @@ export default {
 
 <template>
   <div class="diff-content">
-    <div v-if="!errorMessage" class="diff-viewer">
+    <div class="diff-viewer">
       <template v-if="isTextFile">
-        <empty-file-viewer v-if="diffFile.empty" />
         <inline-diff-view
-          v-else-if="isInlineView"
+          v-if="isInlineView"
           :diff-file="diffFile"
           :diff-lines="diffFile.highlighted_diff_lines || []"
           :help-page-path="helpPagePath"
@@ -94,9 +102,12 @@ export default {
           :help-page-path="helpPagePath"
         />
       </template>
+      <not-diffable-viewer v-else-if="notDiffable" />
+      <no-preview-viewer v-else-if="noPreview" />
       <diff-viewer
         v-else
         :diff-mode="diffMode"
+        :diff-viewer-mode="diffViewerMode"
         :new-path="diffFile.new_path"
         :new-sha="diffFile.diff_refs.head_sha"
         :old-path="diffFile.old_path"
@@ -132,8 +143,5 @@ export default {
         </div>
       </diff-viewer>
     </div>
-    <div v-else class="diff-viewer">
-      <div class="nothing-here-block" v-html="errorMessage"></div>
-    </div>
   </div>
 </template>
diff --git a/app/assets/javascripts/diffs/components/diff_file.vue b/app/assets/javascripts/diffs/components/diff_file.vue
index 449f7007077..347a35b9c54 100644
--- a/app/assets/javascripts/diffs/components/diff_file.vue
+++ b/app/assets/javascripts/diffs/components/diff_file.vue
@@ -7,6 +7,7 @@ import { GlLoadingIcon } from '@gitlab/ui';
 import eventHub from '../../notes/event_hub';
 import DiffFileHeader from './diff_file_header.vue';
 import DiffContent from './diff_content.vue';
+import { diffViewerErrors } from '~/ide/constants';
 
 export default {
   components: {
@@ -33,15 +34,14 @@ export default {
     return {
       isLoadingCollapsedDiff: false,
       forkMessageVisible: false,
+      isCollapsed: this.file.viewer.collapsed || false,
+      renderIt: this.file.renderIt,
     };
   },
   computed: {
     ...mapState('diffs', ['currentDiffFileId']),
     ...mapGetters(['isNotesFetched']),
     ...mapGetters('diffs', ['getDiffFileDiscussions']),
-    isCollapsed() {
-      return this.file.collapsed || false;
-    },
     viewBlobLink() {
       return sprintf(
         __('You can %{linkStart}view the blob%{linkEnd} instead.'),
@@ -52,19 +52,8 @@ export default {
         false,
       );
     },
-    showExpandMessage() {
-      return (
-        this.isCollapsed ||
-        (!this.file.highlighted_diff_lines &&
-          !this.isLoadingCollapsedDiff &&
-          !this.file.too_large &&
-          this.file.text &&
-          !this.file.renamed_file &&
-          !this.file.mode_changed)
-      );
-    },
     showLoadingIcon() {
-      return this.isLoadingCollapsedDiff || (!this.file.renderIt && !this.isCollapsed);
+      return this.isLoadingCollapsedDiff || (!this.renderIt && !this.isCollapsed);
     },
     hasDiffLines() {
       return (
@@ -73,9 +62,15 @@ export default {
         this.file.parallel_diff_lines.length > 0
       );
     },
+    isFileTooLarge() {
+      return this.file.viewer.error === diffViewerErrors.too_large;
+    },
+    errorMessage() {
+      return this.file.viewer.error_message;
+    },
   },
   watch: {
-    'file.collapsed': function fileCollapsedWatch(newVal, oldVal) {
+    isCollapsed: function fileCollapsedWatch(newVal, oldVal) {
       if (!newVal && oldVal && !this.hasDiffLines) {
         this.handleLoadCollapsedDiff();
       }
@@ -90,8 +85,8 @@ export default {
       if (!this.hasDiffLines) {
         this.handleLoadCollapsedDiff();
       } else {
-        this.file.collapsed = !this.file.collapsed;
-        this.file.renderIt = true;
+        this.isCollapsed = !this.isCollapsed;
+        this.renderIt = true;
       }
     },
     handleLoadCollapsedDiff() {
@@ -100,8 +95,8 @@ export default {
       this.loadCollapsedDiff(this.file)
         .then(() => {
           this.isLoadingCollapsedDiff = false;
-          this.file.collapsed = false;
-          this.file.renderIt = true;
+          this.isCollapsed = false;
+          this.renderIt = true;
         })
         .then(() => {
           requestIdleCallback(
@@ -164,21 +159,25 @@ export default {
         Cancel
       </button>
     </div>
-
-    <diff-content
-      v-if="!isCollapsed && file.renderIt"
-      :class="{ hidden: isCollapsed || file.too_large }"
-      :diff-file="file"
-      :help-page-path="helpPagePath"
-    />
     <gl-loading-icon v-if="showLoadingIcon" class="diff-content loading" />
-    <div v-else-if="showExpandMessage" class="nothing-here-block diff-collapsed">
-      {{ __('This diff is collapsed.') }}
-      <a class="click-to-expand js-click-to-expand" href="#" @click.prevent="handleToggle">{{
-        __('Click to expand it.')
-      }}</a>
-    </div>
-    <div v-if="file.too_large" class="nothing-here-block diff-collapsed js-too-large-diff">
+    <template v-else>
+      <div v-if="errorMessage" class="diff-viewer">
+        <div class="nothing-here-block" v-html="errorMessage"></div>
+      </div>
+      <div v-else-if="isCollapsed" class="nothing-here-block diff-collapsed">
+        {{ __('This diff is collapsed.') }}
+        <a class="click-to-expand js-click-to-expand" href="#" @click.prevent="handleToggle">{{
+          __('Click to expand it.')
+        }}</a>
+      </div>
+      <diff-content
+        v-else
+        :class="{ hidden: isCollapsed || isFileTooLarge }"
+        :diff-file="file"
+        :help-page-path="helpPagePath"
+      />
+    </template>
+    <div v-if="isFileTooLarge" class="nothing-here-block diff-collapsed js-too-large-diff">
       {{ __('This source diff could not be displayed because it is too large.') }}
       <span v-html="viewBlobLink"></span>
     </div>
diff --git a/app/assets/javascripts/diffs/components/diff_file_header.vue b/app/assets/javascripts/diffs/components/diff_file_header.vue
index 60586d4a607..2b801898345 100644
--- a/app/assets/javascripts/diffs/components/diff_file_header.vue
+++ b/app/assets/javascripts/diffs/components/diff_file_header.vue
@@ -8,6 +8,7 @@ import FileIcon from '~/vue_shared/components/file_icon.vue';
 import { GlTooltipDirective } from '@gitlab/ui';
 import { truncateSha } from '~/lib/utils/text_utility';
 import { __, s__, sprintf } from '~/locale';
+import { diffViewerModes } from '~/ide/constants';
 import EditButton from './edit_button.vue';
 import DiffStats from './diff_stats.vue';
 
@@ -118,6 +119,12 @@ export default {
     gfmCopyText() {
       return `\`${this.diffFile.file_path}\``;
     },
+    isFileRenamed() {
+      return this.diffFile.viewer.name === diffViewerModes.renamed;
+    },
+    isModeChanged() {
+      return this.diffFile.viewer.name === diffViewerModes.mode_changed;
+    },
   },
   mounted() {
     polyfillSticky(this.$refs.header);
@@ -165,7 +172,7 @@ export default {
           aria-hidden="true"
           css-classes="js-file-icon append-right-5"
         />
-        <span v-if="diffFile.renamed_file">
+        <span v-if="isFileRenamed">
           <strong
             v-gl-tooltip
             :title="diffFile.old_path"
@@ -193,7 +200,7 @@ export default {
         css-class="btn-default btn-transparent btn-clipboard"
       />
 
-      <small v-if="diffFile.mode_changed" ref="fileMode">
+      <small v-if="isModeChanged" ref="fileMode">
         {{ diffFile.a_mode }} → {{ diffFile.b_mode }}
       </small>
 
diff --git a/app/assets/javascripts/diffs/store/actions.js b/app/assets/javascripts/diffs/store/actions.js
index 7fb66ce433b..feda882e826 100644
--- a/app/assets/javascripts/diffs/store/actions.js
+++ b/app/assets/javascripts/diffs/store/actions.js
@@ -17,6 +17,7 @@ import {
   TREE_LIST_STORAGE_KEY,
   WHITESPACE_STORAGE_KEY,
 } from '../constants';
+import { diffViewerModes } from '~/ide/constants';
 
 export const setBaseConfig = ({ commit }, options) => {
   const { endpoint, projectPath } = options;
@@ -91,7 +92,7 @@ export const renderFileForDiscussionId = ({ commit, rootState, state }, discussi
         commit(types.RENDER_FILE, file);
       }
 
-      if (file.collapsed) {
+      if (file.viewer.collapsed) {
         eventHub.$emit(`loadCollapsedDiff/${file.file_hash}`);
         scrollToElement(document.getElementById(file.file_hash));
       } else {
@@ -105,7 +106,8 @@ export const startRenderDiffsQueue = ({ state, commit }) => {
   const checkItem = () =>
     new Promise(resolve => {
       const nextFile = state.diffFiles.find(
-        file => !file.renderIt && (!file.collapsed || !file.text),
+        file =>
+          !file.renderIt && (!file.viewer.collapsed || !file.viewer.name === diffViewerModes.text),
       );
 
       if (nextFile) {
diff --git a/app/assets/javascripts/diffs/store/getters.js b/app/assets/javascripts/diffs/store/getters.js
index 0e1ad654a2b..4e7e5306995 100644
--- a/app/assets/javascripts/diffs/store/getters.js
+++ b/app/assets/javascripts/diffs/store/getters.js
@@ -4,7 +4,8 @@ export const isParallelView = state => state.diffViewType === PARALLEL_DIFF_VIEW
 
 export const isInlineView = state => state.diffViewType === INLINE_DIFF_VIEW_TYPE;
 
-export const hasCollapsedFile = state => state.diffFiles.some(file => file.collapsed);
+export const hasCollapsedFile = state =>
+  state.diffFiles.some(file => file.viewer && file.viewer.collapsed);
 
 export const commitId = state => (state.commit && state.commit.id ? state.commit.id : null);
 
diff --git a/app/assets/javascripts/diffs/store/utils.js b/app/assets/javascripts/diffs/store/utils.js
index 062024b8cdd..247d1e65fea 100644
--- a/app/assets/javascripts/diffs/store/utils.js
+++ b/app/assets/javascripts/diffs/store/utils.js
@@ -1,6 +1,6 @@
 import _ from 'underscore';
-import { diffModes } from '~/ide/constants';
 import { truncatePathMiddleToLength } from '~/lib/utils/text_utility';
+import { diffModes, diffViewerModes } from '~/ide/constants';
 import {
   LINE_POSITION_LEFT,
   LINE_POSITION_RIGHT,
@@ -248,7 +248,8 @@ export function prepareDiffData(diffData) {
 
     Object.assign(file, {
       renderIt: showingLines < LINES_TO_BE_RENDERED_DIRECTLY,
-      collapsed: file.text && showingLines > MAX_LINES_TO_BE_RENDERED,
+      collapsed:
+        file.viewer.name === diffViewerModes.text && showingLines > MAX_LINES_TO_BE_RENDERED,
       discussions: [],
     });
   }
@@ -404,7 +405,9 @@ export const getDiffMode = diffFile => {
   const diffModeKey = Object.keys(diffModes).find(key => diffFile[`${key}_file`]);
   return (
     diffModes[diffModeKey] ||
-    (diffFile.mode_changed && diffModes.mode_changed) ||
+    (diffFile.viewer &&
+      diffFile.viewer.name === diffViewerModes.mode_changed &&
+      diffViewerModes.mode_changed) ||
     diffModes.replaced
   );
 };
diff --git a/app/assets/javascripts/ide/constants.js b/app/assets/javascripts/ide/constants.js
index 804ebae4555..7c560c89695 100644
--- a/app/assets/javascripts/ide/constants.js
+++ b/app/assets/javascripts/ide/constants.js
@@ -24,6 +24,22 @@ export const diffModes = {
   mode_changed: 'mode_changed',
 };
 
+export const diffViewerModes = Object.freeze({
+  not_diffable: 'not_diffable',
+  no_preview: 'no_preview',
+  added: 'added',
+  deleted: 'deleted',
+  renamed: 'renamed',
+  mode_changed: 'mode_changed',
+  text: 'text',
+  image: 'image',
+});
+
+export const diffViewerErrors = Object.freeze({
+  too_large: 'too_large',
+  stored_externally: 'server_side_but_stored_externally',
+});
+
 export const rightSidebarViews = {
   pipelines: { name: 'pipelines-list', keepAlive: true },
   jobsDetail: { name: 'jobs-detail', keepAlive: false },
diff --git a/app/assets/javascripts/notes/components/diff_with_note.vue b/app/assets/javascripts/notes/components/diff_with_note.vue
index 376d4114efd..d8947e8ca50 100644
--- a/app/assets/javascripts/notes/components/diff_with_note.vue
+++ b/app/assets/javascripts/notes/components/diff_with_note.vue
@@ -5,6 +5,7 @@ import DiffViewer from '~/vue_shared/components/diff_viewer/diff_viewer.vue';
 import ImageDiffOverlay from '~/diffs/components/image_diff_overlay.vue';
 import { GlSkeletonLoading } from '@gitlab/ui';
 import { getDiffMode } from '~/diffs/store/utils';
+import { diffViewerModes } from '~/ide/constants';
 
 export default {
   components: {
@@ -31,6 +32,12 @@ export default {
     diffMode() {
       return getDiffMode(this.discussion.diff_file);
     },
+    diffViewerMode() {
+      return this.discussion.diff_file.viewer.name;
+    },
+    isTextFile() {
+      return this.diffViewerMode === diffViewerModes.text;
+    },
     hasTruncatedDiffLines() {
       return (
         this.discussion.truncated_diff_lines && this.discussion.truncated_diff_lines.length !== 0
@@ -58,18 +65,14 @@ export default {
 </script>
 
 <template>
-  <div :class="{ 'text-file': discussion.diff_file.text }" class="diff-file file-holder">
+  <div :class="{ 'text-file': isTextFile }" class="diff-file file-holder">
     <diff-file-header
       :discussion-path="discussion.discussion_path"
       :diff-file="discussion.diff_file"
       :can-current-user-fork="false"
-      :expanded="!discussion.diff_file.collapsed"
+      :expanded="!discussion.diff_file.viewer.collapsed"
     />
-    <div
-      v-if="discussion.diff_file.text"
-      :class="$options.userColorSchemeClass"
-      class="diff-content code"
-    >
+    <div v-if="isTextFile" :class="$options.userColorSchemeClass" class="diff-content code">
       <table>
         <template v-if="hasTruncatedDiffLines">
           <tr
@@ -109,6 +112,7 @@ export default {
     <div v-else>
       <diff-viewer
         :diff-mode="diffMode"
+        :diff-viewer-mode="diffViewerMode"
         :new-path="discussion.diff_file.new_path"
         :new-sha="discussion.diff_file.diff_refs.head_sha"
         :old-path="discussion.diff_file.old_path"
diff --git a/app/assets/javascripts/vue_shared/components/diff_viewer/diff_viewer.vue b/app/assets/javascripts/vue_shared/components/diff_viewer/diff_viewer.vue
index 75c66ed850b..ebb253ff422 100644
--- a/app/assets/javascripts/vue_shared/components/diff_viewer/diff_viewer.vue
+++ b/app/assets/javascripts/vue_shared/components/diff_viewer/diff_viewer.vue
@@ -1,6 +1,5 @@
 <script>
-import { diffModes } from '~/ide/constants';
-import { viewerInformationForPath } from '../content_viewer/lib/viewer_utils';
+import { diffViewerModes, diffModes } from '~/ide/constants';
 import ImageDiffViewer from './viewers/image_diff_viewer.vue';
 import DownloadDiffViewer from './viewers/download_diff_viewer.vue';
 import RenamedFile from './viewers/renamed.vue';
@@ -12,6 +11,10 @@ export default {
       type: String,
       required: true,
     },
+    diffViewerMode: {
+      type: String,
+      required: true,
+    },
     newPath: {
       type: String,
       required: true,
@@ -46,7 +49,7 @@ export default {
   },
   computed: {
     viewer() {
-      if (this.diffMode === diffModes.renamed) {
+      if (this.diffViewerMode === diffViewerModes.renamed) {
         return RenamedFile;
       } else if (this.diffMode === diffModes.mode_changed) {
         return ModeChanged;
@@ -54,11 +57,8 @@ export default {
 
       if (!this.newPath) return null;
 
-      const previewInfo = viewerInformationForPath(this.newPath);
-      if (!previewInfo) return DownloadDiffViewer;
-
-      switch (previewInfo.id) {
-        case 'image':
+      switch (this.diffViewerMode) {
+        case diffViewerModes.image:
           return ImageDiffViewer;
         default:
           return DownloadDiffViewer;
diff --git a/app/assets/javascripts/vue_shared/components/diff_viewer/viewers/no_preview.vue b/app/assets/javascripts/vue_shared/components/diff_viewer/viewers/no_preview.vue
new file mode 100644
index 00000000000..c5cdddf2f64
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/diff_viewer/viewers/no_preview.vue
@@ -0,0 +1,5 @@
+<template>
+  <div class="nothing-here-block">
+    {{ __('No preview for this file type') }}
+  </div>
+</template>
diff --git a/app/assets/javascripts/vue_shared/components/diff_viewer/viewers/not_diffable.vue b/app/assets/javascripts/vue_shared/components/diff_viewer/viewers/not_diffable.vue
new file mode 100644
index 00000000000..d4d3038f066
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/diff_viewer/viewers/not_diffable.vue
@@ -0,0 +1,5 @@
+<template>
+  <div class="nothing-here-block">
+    {{ __('This diff was suppressed by a .gitattributes entry.') }}
+  </div>
+</template>