highlight multiple lines

We can now highlight multiple lines, adding #L1-L2 to the hash.
We can select the ending line with shift + click.

Closes travis-ci/travis-ci#1829

assets/scripts/app/controllers/build.coffee

@@ -2,7 +2,7 @@ Travis.BuildController = Ember.Controller.extend
   needs: ['repo']
   repoBinding: 'controllers.repo.repo'
   commitBinding: 'build.commit'
-  lineNumberBinding: 'controllers.repo.lineNumber'
+  lineNumbersBinding: 'controllers.repo.lineNumbers'
   currentUserBinding: 'controllers.repo.currentUser'
   tabBinding: 'controllers.repo.tab'
 

assets/scripts/app/controllers/job.coffee

@@ -4,7 +4,7 @@ Travis.JobController = Em.Controller.extend
   jobBinding: 'controllers.repo.job'
   repoBinding: 'controllers.repo.repo'
   commitBinding: 'job.commit'
-  lineNumberBinding: 'controllers.repo.lineNumber'
+  lineNumbersBinding: 'controllers.repo.lineNumbers'
   currentUserBinding: 'controllers.repo.currentUser'
   tabBinding: 'controllers.repo.tab'
 

assets/scripts/app/controllers/repo.coffee

@@ -72,3 +72,13 @@ Travis.RepoController = Travis.Controller.extend
   urlGithub: (->
     Travis.Urls.githubRepo(@get('repo.slug'))
   ).property('repo.slug')
+
+  setLineNumbers: (start, end) ->
+    lines = []
+    index = start
+
+    while index <= (end || start)
+      lines.push(index)
+      index++
+
+    @set('lineNumbers', lines)

assets/scripts/app/routes.coffee

@@ -82,7 +82,7 @@ Ember.Route.reopen
 
 Travis.Router.reopen
   transitionTo: ->
-    this.container.lookup('controller:repo').set('lineNumber', null)
+    this.container.lookup('controller:repo').set('lineNumbers', [])
 
     @_super.apply this, arguments
 
@@ -113,7 +113,8 @@ Travis.ApplicationRoute = Ember.Route.extend Travis.LineNumberParser,
   setupController: ->
     @_super.apply this, arguments
 
-    this.controllerFor('repo').set('lineNumber', @fetchLineNumber())
+    line_numbers = @fetchLineNumbers(document.location.hash)
+    this.controllerFor('repo').setLineNumbers line_numbers[0], line_numbers[1]
 
 Travis.SetupLastBuild = Ember.Mixin.create
   setupController: ->

assets/scripts/app/views/log.coffee

@@ -26,7 +26,7 @@ Travis.reopen
       console.log 'log view: did insert' if Log.DEBUG
       @_super.apply this, arguments
       @createEngine()
-      @lineNumberDidChange()
+      @lineNumbersDidChange()
 
     willDestroyElement: ->
       console.log 'log view: will destroy' if Log.DEBUG
@@ -63,9 +63,9 @@ Travis.reopen
         @engine.set(part.number, part.content)
         @propertyDidChange('limited')
 
-    lineNumberDidChange: (->
-      @scroll.set(number) if !@get('isDestroyed') && number = @get('controller.lineNumber')
-    ).observes('controller.lineNumber')
+    lineNumbersDidChange: (->
+      @scroll.set(numbers) if !@get('isDestroyed') && numbers = @get('controller.lineNumbers')
+    ).observes('controller.lineNumbers')
 
     limited: (->
       @engine?.limit?.limited
@@ -80,22 +80,35 @@ Travis.reopen
       event.preventDefault()
 
     numberLineOnHover: ->
-      $('#log').on 'mouseenter', 'a', ->
-        $(@).attr('href', '#L' + ($("#log p:visible").index(@parentNode) + 1))
+      $('#log').on 'mouseenter', 'a', (event) ->
+        hovered  = $("#log p:visible").index(@parentNode) + 1
+        selected = $("#log p:visible").index($('#log p.highlight')) + 1
+
+        if event.shiftKey
+          end   = "-L#{hovered}"
+          start = selected
+        else
+          start = hovered
+          end   = ''
+
+        $(@).attr('href', "#L#{start}#{end}")
 
     click: (event) ->
-      if (href = $(event.target).attr('href')) && matches = href?.match(/#L(\d+)$/)
-        @lineNumberClicked(matches[1])
+      if (href = $(event.target).attr('href')) && matches = href?.match(Travis.LineNumberRegex)
+        lines = [matches[1], matches[3]].sort (a, b) -> a - b
+
+        @lineNumberClicked(lines[0], lines[1])
         event.stopPropagation()
         false
       else
         target = $(event.target)
         target.closest('.fold').toggleClass('open')
 
-    lineNumberClicked: (number) ->
-      path = "#{window.location.pathname}#L#{number}"
+    lineNumberClicked: (start, end) ->
+      second_number = if end then "-L#{end}" else ''
+      path = "#{window.location.pathname}#L#{start}#{second_number}"
       window.history.pushState({ path: path }, null, path);
-      @set('controller.lineNumber', number)
+      @get('controller.controllers.repo').setLineNumbers(start, end)
 
     actions:
       toTop: () ->
@@ -105,25 +118,32 @@ Travis.reopen
 
 Log.Scroll = ->
 Log.Scroll.prototype = $.extend new Log.Listener,
-  set: (number) ->
-    return unless number
-    @number = number
+  set: (numbers) ->
+    return unless numbers.length > 0
+    @numbers = numbers
     @tryScroll()
 
   insert: (log, data, pos) ->
-    @tryScroll() if @number
+    @tryScroll() if @numbers
     true
 
   tryScroll: ->
-    if element = $("#log p:visible")[@number - 1]
+    @removeHighlights()
+    @scrollToFirstLine()
+
+    first_line = @numbers[0] - 1
+    last_line  = @numbers[@numbers.length - 1]
+
+    $('#log').find('p:visible').slice(first_line, last_line).addClass('highlight')
+    @numbers = undefined
+
+  removeHighlights: ->
+    $('#log p.highlight').removeClass('highlight')
+
+  scrollToFirstLine: ->
+    if element = $("#log p:visible")[@numbers[0] - 1]
       $('#main').scrollTop(0)
       $('html, body').scrollTop($(element).offset()?.top) # weird, html works in chrome, body in firefox
-      @highlight(element)
-      @number = undefined
-
-  highlight: (element) ->
-    $('#log p.highlight').removeClass('highlight')
-    $(element).addClass('highlight')
 
 # Log.Logger = ->
 # Log.Logger.prototype = $.extend new Log.Listener,

assets/scripts/lib/travis/line_number_parser.coffee

@@ -1,3 +1,14 @@
+Travis.LineNumberRegex = /#L(\d+)(-L(\d+))?$/
 Travis.LineNumberParser = Ember.Mixin.create
-  fetchLineNumber: ->
-    match[1] if match = document.location.hash.match(/#L(\d+)$/)
+
+  fetchLineNumbers: (hash) ->
+    if match = hash.match(Travis.LineNumberRegex)
+      start = match[1]
+      end   = match[3]
+
+      if end?
+        [start, end]
+      else
+        [start]
+    else
+      []

assets/scripts/spec/unit/line_number_parser_spec.coffee

@@ -0,0 +1,12 @@
+object = Ember.Object.extend(Travis.LineNumberParser)
+subject = object.create()
+
+module "Travis.LineNumberParser",
+  test "without line numbers", ->
+    deepEqual subject.fetchLineNumbers(''), []
+
+  test "with a start date only", ->
+    deepEqual subject.fetchLineNumbers('#L5'), ['5']
+
+  test "with a start and end dates", ->
+    deepEqual subject.fetchLineNumbers('#L5-L6'), ['5', '6']

assets/styles/_mixins/colors.sass

@@ -23,6 +23,7 @@ $yellow-light-2: #fffcf4
 $gray-dark-1: #333
 $gray-dark-2: #444
 $gray-dark-3: #666
+$gray-dark-4: #777
 $gray-medium-1: #999
 $gray-medium-2: #aaa
 $gray-medium-3: #c4cbcc
@@ -65,6 +66,7 @@ $color-bg-log: #222222
 $color-bg-log-fold: $gray-dark-1
 $color-bg-log-hover: $gray-dark-2
 $color-bg-log-highlight: $gray-dark-3
+$color-bg-log-fold-highlight: $gray-dark-4
 $color-bg-slider: $slate-blue-3
 $color-bg-left: $gray-light-4
 $color-bg-list-odd: $white

assets/styles/main/log.sass

@@ -57,6 +57,8 @@ pre#log
     // &.active
     p:first-of-type
       background: $color-bg-log-fold inline-image('ui/log.fold.open.2.png') no-repeat 8px 3px
+      &.highlight
+        background-color: $color-bg-log-fold-highlight
 
     &:not(.open) p:first-of-type
       visibility: visible