2 files changed, 95 insertions, 0 deletions
diff --git a/app/assets/javascripts/diffs/mixins/changed_files.js b/app/assets/javascripts/diffs/mixins/changed_files.js
new file mode 100644
index 00000000000..da1339f0ffa
--- /dev/null
+++ b/app/assets/javascripts/diffs/mixins/changed_files.js
@@ -0,0 +1,38 @@
+export default {
+  props: {
+    diffFiles: {
+      type: Array,
+      required: true,
+    },
+  },
+  methods: {
+    fileChangedIcon(diffFile) {
+      if (diffFile.deletedFile) {
+        return 'file-deletion';
+      } else if (diffFile.newFile) {
+        return 'file-addition';
+      }
+      return 'file-modified';
+    },
+    fileChangedClass(diffFile) {
+      if (diffFile.deletedFile) {
+        return 'cred';
+      } else if (diffFile.newFile) {
+        return 'cgreen';
+      }
+
+      return '';
+    },
+    truncatedDiffPath(path) {
+      const maxLength = 60;
+
+      if (path.length > maxLength) {
+        const start = path.length - maxLength;
+        const end = start + maxLength;
+        return `...${path.slice(start, end)}`;
+      }
+
+      return path;
+    },
+  },
+};
diff --git a/app/assets/javascripts/diffs/mixins/diff_content.js b/app/assets/javascripts/diffs/mixins/diff_content.js
new file mode 100644
index 00000000000..ebb511d3a7e
--- /dev/null
+++ b/app/assets/javascripts/diffs/mixins/diff_content.js
@@ -0,0 +1,57 @@
+import { mapGetters } from 'vuex';
+import diffDiscussions from '../components/diff_discussions.vue';
+import diffLineGutterContent from '../components/diff_line_gutter_content.vue';
+import diffLineNoteForm from '../components/diff_line_note_form.vue';
+import diffTableRow from '../components/diff_table_row.vue';
+import { trimFirstCharOfLineContent } from '../store/utils';
+
+export default {
+  props: {
+    diffFile: {
+      type: Object,
+      required: true,
+    },
+    diffLines: {
+      type: Array,
+      required: true,
+    },
+  },
+  components: {
+    diffDiscussions,
+    diffTableRow,
+    diffLineNoteForm,
+    diffLineGutterContent,
+  },
+  computed: {
+    ...mapGetters(['commit']),
+    commitId() {
+      return this.commit && this.commit.id;
+    },
+    userColorScheme() {
+      return window.gon.user_color_scheme;
+    },
+    normalizedDiffLines() {
+      return this.diffLines.map(line => {
+        if (line.richText) {
+          return trimFirstCharOfLineContent(line);
+        }
+
+        if (line.left) {
+          Object.assign(line, { left: trimFirstCharOfLineContent(line.left) });
+        }
+
+        if (line.right) {
+          Object.assign(line, { right: trimFirstCharOfLineContent(line.right) });
+        }
+
+        return line;
+      });
+    },
+    diffLinesLength() {
+      return this.normalizedDiffLines.length;
+    },
+    fileHash() {
+      return this.diffFile.fileHash;
+    },
+  },
+};