added hotkeys to navigate in stream

Changelog.md

@@ -34,6 +34,7 @@
 * Show timestamp when hovering on comment time-ago string. [#4042](https://github.com/diaspora/diaspora/issues/4042)
 * If sharing a post with photos to Facebook, always include URL to post [#3706](https://github.com/diaspora/diaspora/issues/3706)
 * Add multiphoto for mobile post. [#4065](https://github.com/diaspora/diaspora/issues/4065)
+* Add hotkeys to navigate in stream [#4089](https://github.com/diaspora/diaspora/pull/4089)
 
 # 0.0.3.4
 

app/assets/javascripts/app/views/stream/shortcuts.js

@@ -0,0 +1,108 @@
+app.views.StreamShortcuts = {
+
+  _headerSize: 50,
+  _borderStyle: "3px solid rgb(63, 143, 186)",
+
+
+  setupShortcuts : function() {
+    $(document).on('keydown', _.bind(this._onHotkeyDown, this));
+    $(document).on('keyup', _.bind(this._onHotkeyUp, this));
+
+    this.on('hotkey:gotoNext', this.gotoNext, this);
+    this.on('hotkey:gotoPrev', this.gotoPrev, this);
+    this.on('hotkey:likeSelected', this.likeSelected, this);
+    this.on('hotkey:commentSelected', this.commentSelected, this);
+  },
+
+  _onHotkeyDown: function(event) {
+    //make sure that the user is not typing in an input field
+    var textAcceptingInputTypes = ["textarea", "select", "text", "password", "number", "email", "url", "range", "date", "month", "week", "time", "datetime", "datetime-local", "search", "color"];
+    if(jQuery.inArray(event.target.type, textAcceptingInputTypes) > -1){
+      return;
+    }
+		
+    // trigger the events based on what key was pressed
+    switch (String.fromCharCode( event.which ).toLowerCase()) {
+      case "j":
+        this.trigger('hotkey:gotoNext');
+        break;
+      case "k":
+        this.trigger('hotkey:gotoPrev');
+        break;
+      default:
+    }
+  },
+    
+  _onHotkeyUp: function(event) {
+    //make sure that the user is not typing in an input field
+    var textAcceptingInputTypes = ["textarea", "select", "text", "password", "number", "email", "url", "range", "date", "month", "week", "time", "datetime", "datetime-local", "search", "color"];
+    if(jQuery.inArray(event.target.type, textAcceptingInputTypes) > -1){
+      return;
+    }
+
+    // trigger the events based on what key was pressed
+    switch (String.fromCharCode( event.which ).toLowerCase()) {
+      case "c":
+        this.trigger('hotkey:commentSelected');
+        break;
+      case "l":
+        this.trigger('hotkey:likeSelected');
+        break;
+      default:
+    }
+  },
+
+  gotoNext: function() {
+    // select next post: take the first post under the header
+    var stream_elements = this.$('div.stream_element.loaded');
+    var posUser = window.pageYOffset;
+     
+    for (var i = 0; i < stream_elements.length; i++) {
+      if(stream_elements[i].offsetTop>posUser+this._headerSize){
+        this.selectPost(stream_elements[i]);
+        return;
+      }
+    }
+    // standard: last post
+    if(stream_elements[stream_elements.length-1]){
+      this.selectPost(stream_elements[stream_elements.length-1]);
+    }
+  },
+
+  gotoPrev: function() {
+    // select previous post: take the first post above the header
+    var stream_elements = this.$('div.stream_element.loaded');
+    var posUser = window.pageYOffset;
+      
+    for (var i = stream_elements.length-1; i >=0; i--) {
+      if(stream_elements[i].offsetTop<posUser+this._headerSize){
+        this.selectPost(stream_elements[i]);
+        return;
+      }
+    }
+    // standard: first post
+    if(stream_elements[0]){
+      this.selectPost(stream_elements[0]);
+    }
+  },
+    
+  commentSelected: function() {
+    $('a.focus_comment_textarea',this.$('div.stream_element.loaded.shortcut_selected')).click();
+  },    
+    
+  likeSelected: function() {
+    $('a.like:first',this.$('div.stream_element.loaded.shortcut_selected')).click();
+  },
+    
+  selectPost: function(element){
+    //remove the selection and selected-class from all posts
+    var selected=this.$('div.stream_element.loaded.shortcut_selected');
+    selected.css( "border-left", "" );
+    selected.removeClass('shortcut_selected');
+    //move to new post
+    window.scrollTo(window.pageXOffset, element.offsetTop-this._headerSize);
+    //add the selection and selected-class to new post
+    element.style.borderLeft=this._borderStyle;
+    element.className+=" shortcut_selected";	
+  },
+};

app/assets/javascripts/app/views/stream_view.js

@@ -1,4 +1,8 @@
-app.views.Stream = app.views.InfScroll.extend({
+//= require ./stream/shortcuts
+
+app.views.Stream = app.views.InfScroll.extend(_.extend(
+  app.views.StreamShortcuts, {
+  	
   initialize: function(options) {
     this.stream = this.model
     this.collection = this.stream.items
@@ -8,6 +12,7 @@ app.views.Stream = app.views.InfScroll.extend({
     this.setupNSFW()
     this.setupLightbox()
     this.setupInfiniteScroll()
+    this.setupShortcuts()
   },
 
   postClass : app.views.StreamPost,
@@ -24,4 +29,4 @@ app.views.Stream = app.views.InfScroll.extend({
       _.map(this.postViews, function(view){ view.render() })
     }
   }
-});
+}));

features/keyboard_navigation.feature

@@ -0,0 +1,40 @@
+@javascript
+Feature: Keyboard navigation
+  In order not to have to move my hand to the mouse
+  As a user
+  I want to be able to navigate the stream by keyboard
+
+  Background:
+    Given many posts from alice for bob
+    And I sign in as "bob@bob.bob"
+
+  Scenario: navigate downwards
+    When I am on the home page
+    When I wait for the ajax to finish
+    And I press the "J" key somewhere
+    Then post 1 should be highlighted
+    And I should have navigated to the highlighted post
+
+    When I press the "J" key somewhere
+    Then post 2 should be highlighted
+    And I should have navigated to the highlighted post
+    
+    Given I expand the publisher
+    When I press the "J" key in the publisher
+    Then post 2 should be highlighted
+    
+  Scenario: navigate upwards
+    When I am on the home page
+    When I wait for the ajax to finish
+    And I scroll to post 3
+    When I press the "K" key somewhere
+    Then post 2 should be highlighted
+    And I should have navigated to the highlighted post
+    
+  Scenario: expand the comment form in the main stream
+    When I am on the home page
+    When I wait for the ajax to finish
+    Then the first comment field should be closed
+    When I press the "J" key somewhere
+    And I press the "C" key somewhere
+    Then the first comment field should be open

features/step_definitions/keyboard_navigation_steps.rb

@@ -0,0 +1,20 @@
+When /^I press the "([^\"]*)" key somewhere$/ do |key|
+  find("div.stream_element").native.send_keys(key)
+end
+
+When /^I press the "([^\"]*)" key in the publisher$/ do |key|
+  find("#status_message_fake_text").native.send_keys(key)                    
+end
+
+Then /^post (\d+) should be highlighted$/ do |position|
+  find(".shortcut_selected .post-content").text.should == stream_element_numbers_content(position).text
+end
+
+And /^I should have navigated to the highlighted post$/ do
+  find(".shortcut_selected")["offsetTop"].to_i.should == page.evaluate_script("window.pageYOffset + 50").to_i
+end
+
+When /^I scroll to post (\d+)$/ do |position|
+  page.driver.browser.execute_script("var element = $('div.stream_element')[" + position + " - 1];
+  window.scrollTo(window.pageXOffset, element.offsetTop-50);")
+end

spec/javascripts/app/views/stream/shortcuts_spec.js

@@ -0,0 +1,130 @@
+describe("app.views.StreamShortcuts", function () {
+    
+  beforeEach(function() {
+    this.post1 = factory.post({author : factory.author({name : "Rebecca Black", id : 1492})})
+    this.post2 = factory.post({author : factory.author({name : "John Stamos", id : 1987})})
+    
+    this.stream = new app.models.Stream();
+    this.stream.add([this.post1, this.post2]);
+    this.view = new app.views.Stream({model : this.stream});
+    
+    this.view.render();
+    expect(this.view.$('div.stream_element.loaded').length).toBe(2);
+  });
+  
+  describe("loading the stream", function(){
+    it("should setup the shortcuts", function(){
+      spyOn(this.view, 'setupShortcuts');      
+      this.view.initialize();
+      expect(this.view.setupShortcuts).toHaveBeenCalled();
+    });
+  });   
+  
+  describe("pressing 'j'", function(){     
+      
+    it("should call 'gotoNext' if not pressed in an input field", function(){
+      spyOn(this.view, 'gotoNext');
+      this.view.initialize();
+      var e = $.Event("keydown", { which: 74, target: {type: "div"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('j');
+      this.view._onHotkeyDown(e);
+      expect(this.view.gotoNext).toHaveBeenCalled();
+    });
+    
+    it("'gotoNext' should call 'selectPost'", function(){
+      spyOn(this.view, 'selectPost');
+      this.view.gotoNext();
+      expect(this.view.selectPost).toHaveBeenCalled();
+    });
+     
+    it("shouldn't do anything if the user types in an input field", function(){
+      spyOn(this.view, 'gotoNext');
+      spyOn(this.view, 'selectPost');
+      this.view.initialize();
+      var e = $.Event("keydown", { which: 74, target: {type: "textarea"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('j');
+      this.view._onHotkeyDown(e);
+      expect(this.view.gotoNext).not.toHaveBeenCalled();
+      expect(this.view.selectPost).not.toHaveBeenCalled();
+    });
+  });
+  
+  describe("pressing 'k'", function(){
+
+    it("should call 'gotoPrev' if not pressed in an input field", function(){
+      spyOn(this.view, 'gotoPrev');
+      this.view.initialize();
+      var e = $.Event("keydown", { which: 75, target: {type: "div"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('k');
+      this.view._onHotkeyDown(e);
+      expect(this.view.gotoPrev).toHaveBeenCalled();
+    });
+    
+    it("'gotoPrev' should call 'selectPost'", function(){
+      spyOn(this.view, 'selectPost');
+      this.view.gotoPrev();
+      expect(this.view.selectPost).toHaveBeenCalled();
+    });
+      
+    it("shouldn't do anything if the user types in an input field", function(){
+      spyOn(this.view, 'gotoPrev');
+      spyOn(this.view, 'selectPost');
+      this.view.initialize();
+      var e = $.Event("keydown", { which: 75, target: {type: "textarea"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('k');
+      this.view._onHotkeyDown(e);
+      expect(this.view.gotoPrev).not.toHaveBeenCalled();
+      expect(this.view.selectPost).not.toHaveBeenCalled();
+    });
+  });
+  
+  describe("pressing 'c'", function(){
+
+    it("should click on the comment-button if not pressed in an input field", function(){
+      spyOn(this.view, 'commentSelected');
+      this.view.initialize();
+      var e = $.Event("keyup", { which: 67, target: {type: "div"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('c');
+      this.view._onHotkeyUp(e);
+      expect(this.view.commentSelected).toHaveBeenCalled();
+    });
+      
+    it("shouldn't do anything if the user types in an input field", function(){
+      spyOn(this.view, 'commentSelected');
+      this.view.initialize();
+      var e = $.Event("keyup", { which: 67, target: {type: "textarea"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('c');
+      this.view._onHotkeyUp(e);
+      expect(this.view.commentSelected).not.toHaveBeenCalled();
+    });
+  });
+    
+  describe("pressing 'l'", function(){
+    
+    it("should click on the like-button if not pressed in an input field", function(){
+      spyOn(this.view, 'likeSelected');
+      this.view.initialize();
+      var e = $.Event("keyup", { which: 76, target: {type: "div"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('l');
+      this.view._onHotkeyUp(e);
+      expect(this.view.likeSelected).toHaveBeenCalled();
+    });
+      
+    it("shouldn't do anything if the user types in an input field", function(){
+      spyOn(this.view, 'likeSelected');
+      this.view.initialize();
+      var e = $.Event("keyup", { which: 76, target: {type: "textarea"} });
+      //verify that the test is correct
+      expect(String.fromCharCode( e.which ).toLowerCase()).toBe('l');
+      this.view._onHotkeyUp(e);
+      expect(this.view.likeSelected).not.toHaveBeenCalled();
+    });
+  });
+})