Merge branch 'ide-fix-back-btn' into 'master'

Repo Editor : Fixes Back Button for files + line number jumping for preview and editor

See merge request gitlab-org/gitlab-ce!14508

9 files changed, 124 insertions, 34 deletions

diff --git a/app/assets/javascripts/line_highlighter.js b/app/assets/javascripts/line_highlighter.js
index a16d00b5cef..a75d1a4b8d0 100644
--- a/app/assets/javascripts/line_highlighter.js
+++ b/app/assets/javascripts/line_highlighter.js
@@ -54,12 +54,14 @@ LineHighlighter.prototype.bindEvents = function() {
   $fileHolder.on('highlight:line', this.highlightHash);
 };
 
-LineHighlighter.prototype.highlightHash = function() {
-  var range;
+LineHighlighter.prototype.highlightHash = function(newHash) {
+  let range;
+  if (newHash && typeof newHash === 'string') this._hash = newHash;
+
+  this.clearHighlight();
 
   if (this._hash !== '') {
     range = this.hashToRange(this._hash);
-
     if (range[0]) {
       this.highlightRange(range);
       const lineSelector = `#L${range[0]}`;
diff --git a/app/assets/javascripts/repo/components/repo_editor.vue b/app/assets/javascripts/repo/components/repo_editor.vue
index 96d6a75bb61..02d9c775046 100644
--- a/app/assets/javascripts/repo/components/repo_editor.vue
+++ b/app/assets/javascripts/repo/components/repo_editor.vue
@@ -63,12 +63,7 @@ const RepoEditor = {
       const lineNumber = e.target.position.lineNumber;
       if (e.target.element.classList.contains('line-numbers')) {
         location.hash = `L${lineNumber}`;
-        Store.activeLine = lineNumber;
-
-        Helper.monacoInstance.setPosition({
-          lineNumber: this.activeLine,
-          column: 1,
-        });
+        Store.setActiveLine(lineNumber);
       }
     },
   },
@@ -101,6 +96,15 @@ const RepoEditor = {
         this.setupEditor();
       }
     },
+
+    activeLine() {
+      if (Helper.monacoInstance) {
+        Helper.monacoInstance.setPosition({
+          lineNumber: this.activeLine,
+          column: 1,
+        });
+      }
+    },
   },
   computed: {
     shouldHideEditor() {
diff --git a/app/assets/javascripts/repo/components/repo_preview.vue b/app/assets/javascripts/repo/components/repo_preview.vue
index 2fe369a4693..a87bef6084a 100644
--- a/app/assets/javascripts/repo/components/repo_preview.vue
+++ b/app/assets/javascripts/repo/components/repo_preview.vue
@@ -14,6 +14,11 @@ export default {
     highlightFile() {
       $(this.$el).find('.file-content').syntaxHighlight();
     },
+    highlightLine() {
+      if (Store.activeLine > -1) {
+        this.lineHighlighter.highlightHash(`#L${Store.activeLine}`);
+      }
+    },
   },
   mounted() {
     this.highlightFile();
@@ -26,8 +31,12 @@ export default {
     html() {
       this.$nextTick(() => {
         this.highlightFile();
+        this.highlightLine();
       });
     },
+    activeLine() {
+      this.highlightLine();
+    },
   },
 };
 </script>
diff --git a/app/assets/javascripts/repo/components/repo_sidebar.vue b/app/assets/javascripts/repo/components/repo_sidebar.vue
index 685f6ff806f..e0f3c33003a 100644
--- a/app/assets/javascripts/repo/components/repo_sidebar.vue
+++ b/app/assets/javascripts/repo/components/repo_sidebar.vue
@@ -18,22 +18,40 @@ export default {
   },
 
   created() {
-    this.addPopEventListener();
+    window.addEventListener('popstate', this.checkHistory);
+  },
+  destroyed() {
+    window.removeEventListener('popstate', this.checkHistory);
   },
 
   data: () => Store,
 
   methods: {
-    addPopEventListener() {
-      window.addEventListener('popstate', () => {
-        if (location.href.indexOf('#') > -1) return;
-        this.linkClicked({
+    checkHistory() {
+      let selectedFile = this.files.find(file => location.pathname.indexOf(file.url) > -1);
+      if (!selectedFile) {
+        // Maybe it is not in the current tree but in the opened tabs
+        selectedFile = Helper.getFileFromPath(location.pathname);
+      }
+
+      let lineNumber = null;
+      if (location.hash.indexOf('#L') > -1) lineNumber = Number(location.hash.substr(2));
+
+      if (selectedFile) {
+        if (selectedFile.url !== this.activeFile.url) {
+          this.fileClicked(selectedFile, lineNumber);
+        } else {
+          Store.setActiveLine(lineNumber);
+        }
+      } else {
+        // Not opened at all lets open new tab
+        this.fileClicked({
           url: location.href,
-        });
-      });
+        }, lineNumber);
+      }
     },
 
-    fileClicked(clickedFile) {
+    fileClicked(clickedFile, lineNumber) {
       let file = clickedFile;
       if (file.loading) return;
       file.loading = true;
@@ -41,17 +59,20 @@ export default {
       if (file.type === 'tree' && file.opened) {
         file = Store.removeChildFilesOfTree(file);
         file.loading = false;
+        Store.setActiveLine(lineNumber);
       } else {
         const openFile = Helper.getFileFromPath(file.url);
         if (openFile) {
           file.loading = false;
           Store.setActiveFiles(openFile);
+          Store.setActiveLine(lineNumber);
         } else {
           Service.url = file.url;
           Helper.getContent(file)
             .then(() => {
               file.loading = false;
               Helper.scrollTabsRight();
+              Store.setActiveLine(lineNumber);
             })
             .catch(Helper.loadingError);
         }
diff --git a/app/assets/javascripts/repo/helpers/repo_helper.js b/app/assets/javascripts/repo/helpers/repo_helper.js
index ac59a2bed23..7483f8bc305 100644
--- a/app/assets/javascripts/repo/helpers/repo_helper.js
+++ b/app/assets/javascripts/repo/helpers/repo_helper.js
@@ -254,7 +254,9 @@ const RepoHelper = {
 
     RepoHelper.key = RepoHelper.genKey();
 
-    history.pushState({ key: RepoHelper.key }, '', url);
+    if (document.location.pathname !== url) {
+      history.pushState({ key: RepoHelper.key }, '', url);
+    }
 
     if (title) {
       document.title = title;
diff --git a/app/assets/javascripts/repo/stores/repo_store.js b/app/assets/javascripts/repo/stores/repo_store.js
index 9a4fc40bc69..93b39cff27e 100644
--- a/app/assets/javascripts/repo/stores/repo_store.js
+++ b/app/assets/javascripts/repo/stores/repo_store.js
@@ -26,7 +26,7 @@ const RepoStore = {
   },
   activeFile: Helper.getDefaultActiveFile(),
   activeFileIndex: 0,
-  activeLine: 0,
+  activeLine: -1,
   activeFileLabel: 'Raw',
   files: [],
   isCommitable: false,
@@ -85,6 +85,7 @@ const RepoStore = {
 
     if (!file.loading) Helper.updateHistoryEntry(file.url, file.pageTitle || file.name);
     RepoStore.binary = file.binary;
+    RepoStore.setActiveLine(-1);
   },
 
   setFileActivity(file, openedFile, i) {
@@ -101,6 +102,10 @@ const RepoStore = {
     RepoStore.activeFileIndex = i;
   },
 
+  setActiveLine(activeLine) {
+    if (!isNaN(activeLine)) RepoStore.activeLine = activeLine;
+  },
+
   setActiveToRaw() {
     RepoStore.activeFile.raw = false;
     // can't get vue to listen to raw for some reason so RepoStore for now.
diff --git a/spec/javascripts/repo/components/repo_file_spec.js b/spec/javascripts/repo/components/repo_file_spec.js
index f15633bd8b9..620b604f404 100644
--- a/spec/javascripts/repo/components/repo_file_spec.js
+++ b/spec/javascripts/repo/components/repo_file_spec.js
@@ -29,15 +29,17 @@ describe('RepoFile', () => {
     }).$mount();
   }
 
-  beforeEach(() => {
-    spyOn(repoFile.mixins[0].methods, 'timeFormated').and.returnValue(updated);
-  });
-
   it('renders link, icon, name and last commit details', () => {
-    const vm = createComponent({
-      file,
-      activeFile,
+    const RepoFile = Vue.extend(repoFile);
+    const vm = new RepoFile({
+      propsData: {
+        file,
+        activeFile,
+      },
     });
+    spyOn(vm, 'timeFormated').and.returnValue(updated);
+    vm.$mount();
+
     const name = vm.$el.querySelector('.repo-file-name');
     const fileIcon = vm.$el.querySelector('.file-icon');
 
diff --git a/spec/javascripts/repo/components/repo_sidebar_spec.js b/spec/javascripts/repo/components/repo_sidebar_spec.js
index 23c10ea022e..35d2b37ac2a 100644
--- a/spec/javascripts/repo/components/repo_sidebar_spec.js
+++ b/spec/javascripts/repo/components/repo_sidebar_spec.js
@@ -5,18 +5,26 @@ import RepoStore from '~/repo/stores/repo_store';
 import repoSidebar from '~/repo/components/repo_sidebar.vue';
 
 describe('RepoSidebar', () => {
+  let vm;
+
   function createComponent() {
     const RepoSidebar = Vue.extend(repoSidebar);
 
     return new RepoSidebar().$mount();
   }
 
+  afterEach(() => {
+    vm.$destroy();
+  });
+
   it('renders a sidebar', () => {
     RepoStore.files = [{
       id: 0,
     }];
     RepoStore.openedFiles = [];
-    const vm = createComponent();
+    RepoStore.isRoot = false;
+
+    vm = createComponent();
     const thead = vm.$el.querySelector('thead');
     const tbody = vm.$el.querySelector('tbody');
 
@@ -35,7 +43,7 @@ describe('RepoSidebar', () => {
     RepoStore.openedFiles = [{
       id: 0,
     }];
-    const vm = createComponent();
+    vm = createComponent();
 
     expect(vm.$el.classList.contains('sidebar-mini')).toBeTruthy();
     expect(vm.$el.querySelector('thead')).toBeFalsy();
@@ -47,7 +55,7 @@ describe('RepoSidebar', () => {
       tree: true,
     };
     RepoStore.files = [];
-    const vm = createComponent();
+    vm = createComponent();
 
     expect(vm.$el.querySelectorAll('tbody .loading-file').length).toEqual(5);
   });
@@ -57,7 +65,7 @@ describe('RepoSidebar', () => {
       id: 0,
     }];
     RepoStore.isRoot = true;
-    const vm = createComponent();
+    vm = createComponent();
 
     expect(vm.$el.querySelector('tbody .prev-directory')).toBeTruthy();
   });
@@ -72,7 +80,7 @@ describe('RepoSidebar', () => {
         };
         RepoStore.files = [file1];
         RepoStore.isRoot = true;
-        const vm = createComponent();
+        vm = createComponent();
 
         vm.fileClicked(file1);
 
@@ -87,7 +95,7 @@ describe('RepoSidebar', () => {
 
         spyOn(Helper, 'getFileFromPath').and.returnValue(file);
         spyOn(RepoStore, 'setActiveFiles');
-        const vm = createComponent();
+        vm = createComponent();
         vm.fileClicked(file);
 
         expect(RepoStore.setActiveFiles).toHaveBeenCalledWith(file);
@@ -103,7 +111,7 @@ describe('RepoSidebar', () => {
         };
         RepoStore.files = [file1];
         RepoStore.isRoot = true;
-        const vm = createComponent();
+        vm = createComponent();
 
         vm.fileClicked(file1);
 
@@ -114,12 +122,48 @@ describe('RepoSidebar', () => {
     describe('goToPreviousDirectoryClicked', () => {
       it('should hide files in directory if already open', () => {
         const prevUrl = 'foo/bar';
-        const vm = createComponent();
+        vm = createComponent();
 
         vm.goToPreviousDirectoryClicked(prevUrl);
 
         expect(RepoService.url).toEqual(prevUrl);
       });
     });
+
+    describe('back button', () => {
+      const file1 = {
+        id: 1,
+        url: 'file1',
+      };
+      const file2 = {
+        id: 2,
+        url: 'file2',
+      };
+      RepoStore.files = [file1, file2];
+      RepoStore.openedFiles = [file1, file2];
+      RepoStore.isRoot = true;
+
+      vm = createComponent();
+      vm.fileClicked(file1);
+
+      it('render previous file when using back button', () => {
+        spyOn(Helper, 'getContent').and.callThrough();
+
+        vm.fileClicked(file2);
+        expect(Helper.getContent).toHaveBeenCalledWith(file2);
+        Helper.getContent.calls.reset();
+
+        history.pushState({
+          key: Math.random(),
+        }, '', file1.url);
+        const popEvent = document.createEvent('Event');
+        popEvent.initEvent('popstate', true, true);
+        window.dispatchEvent(popEvent);
+
+        expect(Helper.getContent.calls.mostRecent().args[0].url).toContain(file1.url);
+
+        window.history.pushState({}, null, '/');
+      });
+    });
   });
 });
diff --git a/spec/javascripts/vue_mr_widget/services/mr_widget_service_spec.js b/spec/javascripts/vue_mr_widget/services/mr_widget_service_spec.js
index b63633c03b8..e667b4b3677 100644
--- a/spec/javascripts/vue_mr_widget/services/mr_widget_service_spec.js
+++ b/spec/javascripts/vue_mr_widget/services/mr_widget_service_spec.js
@@ -31,6 +31,7 @@ describe('MRWidgetService', () => {
   });
 
   it('should have methods defined', () => {
+    window.history.pushState({}, null, '/');
     const service = new MRWidgetService(mr);
 
     expect(service.merge()).toBeDefined();