Merge pull request atom#13095 from atom/fb-vj-follow-through

Introduce follow through behavior for tooltips

package.json

@@ -82,7 +82,7 @@
     "one-light-syntax": "1.6.0",
     "solarized-dark-syntax": "1.1.1",
     "solarized-light-syntax": "1.1.1",
-    "about": "1.7.0",
+    "about": "1.7.1",
     "archive-view": "0.62.0",
     "autocomplete-atom-api": "0.10.0",
     "autocomplete-css": "0.14.1",

spec/tooltip-manager-spec.coffee

@@ -1,4 +1,6 @@
+{CompositeDisposable} = require 'atom'
 TooltipManager = require '../src/tooltip-manager'
+Tooltip = require '../src/tooltip'
 _ = require 'underscore-plus'
 
 describe "TooltipManager", ->
@@ -9,17 +11,27 @@ describe "TooltipManager", ->
 
   beforeEach ->
     manager = new TooltipManager(keymapManager: atom.keymaps, viewRegistry: atom.views)
-    element = document.createElement('div')
-    element.classList.add('foo')
-    jasmine.attachToDOM(element)
+    element = createElement 'foo'
 
-  hover = (element, fn) ->
+  createElement = (className) ->
+    el = document.createElement('div')
+    el.classList.add(className)
+    jasmine.attachToDOM(el)
+    el
+
+  mouseEnter = (element) ->
     element.dispatchEvent(new CustomEvent('mouseenter', bubbles: false))
     element.dispatchEvent(new CustomEvent('mouseover', bubbles: true))
-    advanceClock(manager.hoverDefaults.delay.show)
-    fn()
+
+  mouseLeave = (element) ->
     element.dispatchEvent(new CustomEvent('mouseleave', bubbles: false))
     element.dispatchEvent(new CustomEvent('mouseout', bubbles: true))
+
+  hover = (element, fn) ->
+    mouseEnter(element)
+    advanceClock(manager.hoverDefaults.delay.show)
+    fn()
+    mouseLeave(element)
     advanceClock(manager.hoverDefaults.delay.hide)
 
   describe "::add(target, options)", ->
@@ -29,6 +41,32 @@ describe "TooltipManager", ->
         hover element, ->
           expect(document.body.querySelector(".tooltip")).toHaveText("Title")
 
+      it "displays tooltips immediately when hovering over new elements once a tooltip has been displayed once", ->
+        disposables = new CompositeDisposable
+        element1 = createElement('foo')
+        disposables.add(manager.add element1, title: 'Title')
+        element2 = createElement('bar')
+        disposables.add(manager.add element2, title: 'Title')
+        element3 = createElement('baz')
+        disposables.add(manager.add element3, title: 'Title')
+
+        hover element1, ->
+        expect(document.body.querySelector(".tooltip")).toBeNull()
+
+        mouseEnter(element2)
+        expect(document.body.querySelector(".tooltip")).not.toBeNull()
+        mouseLeave(element2)
+        advanceClock(manager.hoverDefaults.delay.hide)
+        expect(document.body.querySelector(".tooltip")).toBeNull()
+
+        advanceClock(Tooltip.FOLLOW_THROUGH_DURATION)
+        mouseEnter(element3)
+        expect(document.body.querySelector(".tooltip")).toBeNull()
+        advanceClock(manager.hoverDefaults.delay.show)
+        expect(document.body.querySelector(".tooltip")).not.toBeNull()
+
+        disposables.dispose()
+
     describe "when the trigger is 'manual'", ->
       it "creates a tooltip immediately and only hides it on dispose", ->
         disposable = manager.add element, title: "Title", trigger: "manual"
@@ -149,6 +187,6 @@ describe "TooltipManager", ->
       it "hides the tooltips", ->
         manager.add element, title: "Title"
         hover element, ->
-          expect(document.body.querySelector(".tooltip")).toBeDefined()
+          expect(document.body.querySelector(".tooltip")).not.toBeNull()
           window.dispatchEvent(new CustomEvent('resize'))
           expect(document.body.querySelector(".tooltip")).toBeNull()

src/tooltip.js

@@ -7,6 +7,8 @@ const listen = require('./delegated-listener')
 // This tooltip class is derived from Bootstrap 3, but modified to not require
 // jQuery, which is an expensive dependency we want to eliminate.
 
+var followThroughTimer = null
+
 var Tooltip = function (element, options, viewRegistry) {
   this.options = null
   this.enabled = null
@@ -21,7 +23,7 @@ var Tooltip = function (element, options, viewRegistry) {
 
 Tooltip.VERSION = '3.3.5'
 
-Tooltip.TRANSITION_DURATION = 150
+Tooltip.FOLLOW_THROUGH_DURATION = 300
 
 Tooltip.DEFAULTS = {
   animation: true,
@@ -151,7 +153,11 @@ Tooltip.prototype.enter = function (event) {
 
   this.hoverState = 'in'
 
-  if (!this.options.delay || !this.options.delay.show) return this.show()
+  if (!this.options.delay ||
+      !this.options.delay.show ||
+      followThroughTimer) {
+    return this.show()
+  }
 
   this.timeout = setTimeout(function () {
     if (this.hoverState === 'in') this.show()
@@ -343,6 +349,14 @@ Tooltip.prototype.hide = function (callback) {
 
   this.hoverState = null
 
+  clearTimeout(followThroughTimer)
+  followThroughTimer = setTimeout(
+    function () {
+      followThroughTimer = null
+    },
+    Tooltip.FOLLOW_THROUGH_DURATION
+  )
+
   return this
 }