Add shift+m shortcut to diff view

Shift+m marks the current file as reviewed and navigates to the next
unreviewed file.

Bug: Issue 9280
Change-Id: I11ac225dfbfdf07b10b35297314031c48fd0799c

polygerrit-ui/app/behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.html

@@ -164,6 +164,7 @@ shortcuts are.
     PREV_FILE: 'PREV_FILE',
     NEXT_FILE_WITH_COMMENTS: 'NEXT_FILE_WITH_COMMENTS',
     PREV_FILE_WITH_COMMENTS: 'PREV_FILE_WITH_COMMENTS',
+    NEXT_UNREVIEWED_FILE: 'NEXT_UNREVIEWED_FILE',
     CURSOR_NEXT_FILE: 'CURSOR_NEXT_FILE',
     CURSOR_PREV_FILE: 'CURSOR_PREV_FILE',
     OPEN_FILE: 'OPEN_FILE',
@@ -252,6 +253,8 @@ shortcuts are.
       'Mark/unmark file as reviewed');
   _describe(Shortcut.TOGGLE_DIFF_MODE, ShortcutSection.DIFFS,
       'Toggle unified/side-by-side diff');
+  _describe(Shortcut.NEXT_UNREVIEWED_FILE, ShortcutSection.DIFFS,
+      'Mark file as reviewed and go to next unreviewed file');
 
   _describe(Shortcut.NEXT_FILE, ShortcutSection.NAVIGATION, 'Select next file');
   _describe(Shortcut.PREV_FILE, ShortcutSection.NAVIGATION,

polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js

@@ -169,6 +169,10 @@
         type: Object,
         computed: '_getRevisionInfo(_change)',
       },
+      _reviewedFiles: {
+        type: Object,
+        value: () => new Set(),
+      },
     },
 
     behaviors: [
@@ -215,6 +219,7 @@
         [this.Shortcut.TOGGLE_DIFF_MODE]: '_handleToggleDiffMode',
         [this.Shortcut.TOGGLE_FILE_REVIEWED]: '_handleToggleFileReviewed',
         [this.Shortcut.EXPAND_ALL_DIFF_CONTEXT]: '_handleExpandAllDiffContext',
+        [this.Shortcut.NEXT_UNREVIEWED_FILE]: '_handleNextUnreviewedFile',
 
         // Final two are actually handled by gr-diff-comment-thread.
         [this.Shortcut.EXPAND_ALL_COMMENT_THREADS]: null,
@@ -564,10 +569,18 @@
       return {path: fileList[idx]};
     },
 
+    _getReviewedFiles(changeNum, patchNum) {
+      return this.$.restAPI.getReviewedFiles(changeNum, patchNum)
+          .then(files => {
+            this._reviewedFiles = new Set(files);
+            return this._reviewedFiles;
+          });
+    },
+
     _getReviewedStatus(editMode, changeNum, patchNum, path) {
       if (editMode) { return Promise.resolve(false); }
-      return this.$.restAPI.getReviewedFiles(changeNum, patchNum)
-          .then(files => files.includes(path));
+      return this._getReviewedFiles(changeNum, patchNum)
+          .then(files => files.has(path));
     },
 
     _paramsChanged(value) {
@@ -1025,5 +1038,15 @@
     _computeDiffPrefsDisabled(disableDiffPrefs, loggedIn) {
       return disableDiffPrefs || !loggedIn;
     },
+
+    _handleNextUnreviewedFile(e) {
+      this._setReviewed(true);
+      // Ensure that the currently viewed file always appears in unreviewedFiles
+      // so we resolve the right "next" file.
+      const unreviewedFiles = this._fileList
+          .filter(file =>
+          (file === this._path || !this._reviewedFiles.has(file)));
+      this._navToFile(this._path, unreviewedFiles, 1);
+    },
   });
 })();

polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html

@@ -67,6 +67,7 @@ limitations under the License.
     kb.bindShortcut(kb.Shortcut.EXPAND_ALL_DIFF_CONTEXT, 'shift+x');
     kb.bindShortcut(kb.Shortcut.EXPAND_ALL_COMMENT_THREADS, 'e');
     kb.bindShortcut(kb.Shortcut.COLLAPSE_ALL_COMMENT_THREADS, 'shift+e');
+    kb.bindShortcut(kb.Shortcut.NEXT_UNREVIEWED_FILE, 'shift+m');
 
     let element;
     let sandbox;
@@ -1127,5 +1128,22 @@ limitations under the License.
       assert.isTrue(setStub.calledOnce);
       assert.isTrue(setStub.calledWith(101, 'test-project'));
     });
+
+    test('shift+m navigates to next unreviewed file', () => {
+      element._fileList = ['file1', 'file2', 'file3'];
+      element._reviewedFiles = new Set(['file1', 'file2']);
+      element._path = 'file1';
+      const reviewedStub = sandbox.stub(element, '_setReviewed');
+      const navStub = sandbox.stub(element, '_navToFile');
+      MockInteractions.pressAndReleaseKeyOn(element, 77, 'shift', 'm');
+      flushAsynchronousOperations();
+
+      assert.isTrue(reviewedStub.lastCall.args[0]);
+      assert.deepEqual(navStub.lastCall.args, [
+        'file1',
+        ['file1', 'file3'],
+        1,
+      ]);
+    });
   });
 </script>

polygerrit-ui/app/elements/gr-app.js

@@ -272,6 +272,8 @@
           this.Shortcut.OPEN_FILE, 'o', 'enter');
       this.bindShortcut(
           this.Shortcut.TOGGLE_FILE_REVIEWED, 'r');
+      this.bindShortcut(
+          this.Shortcut.NEXT_UNREVIEWED_FILE, 'shift+m');
       this.bindShortcut(
           this.Shortcut.TOGGLE_ALL_INLINE_DIFFS, 'shift+i:keyup');
       this.bindShortcut(