Implement multi-select, remove click-to-navigate from level editor

app/lib/surface/Lank.coffee

@@ -649,6 +649,10 @@ module.exports = Lank = class Lank extends CocoClass
     @marks[name] ?= new Mark name: name, lank: @, camera: @options.camera, layer: layer ? @options.groundLayer, thangType: thangType
     @marks[name]
     
+  removeMark: (name) ->
+    @marks[name].destroy()
+    delete @marks[name]
+
   notifySpeechUpdated: (e) ->
     e = _.clone(e)
     e.sprite = @

app/lib/surface/LankBoss.coffee

@@ -282,11 +282,21 @@ module.exports = class LankBoss extends CocoClass
     @selectLank e if e.onBackground
 
   onChangeSelected: (gameUIState, selected) ->
-    if selected
+    oldLanks = (s.sprite for s in gameUIState.previousAttributes().selected or [])
-      @selectThang(selected.thang.id, selected.spellName)
+    newLanks = (s.sprite for s in selected or [])
-    else
+    addedLanks = _.difference(newLanks, oldLanks)
-      @selectedLank?.selected = false
+    removedLanks = _.difference(oldLanks, newLanks)
-      @selectedLank = null
+
+    for lank in addedLanks
+      layer = if lank.sprite.parent isnt @layerAdapters.Default.container then @layerAdapters.Default else @layerAdapters.Ground
+      mark = new Mark name: 'selection', camera: @camera, layer: layer, thangType: 'selection'
+      mark.toggle true
+      mark.setLank(lank)
+      mark.update()
+      lank.marks.selection = mark # TODO: Figure out how to non-hackily assign lank this mark
+      
+    for lank in removedLanks
+      lank.removeMark?('selection')
 
   selectThang: (thangID, spellName=null, treemaThangSelected = null) ->
     return @willSelectThang = [thangID, spellName] unless @lanks[thangID]

app/models/GameUIState.coffee

@@ -2,4 +2,28 @@ CocoModel = require './CocoModel'
 
 module.exports = class GameUIState extends CocoModel
   @className: 'GameUIState'
+  @schema: {
+    type: 'object'
+    properties: {
       
+      canDragCamera: {
+        type: 'boolean'
+        description: 'Serves as a lock to enable or disable camera movement.'
+      }
+      
+      selected: {
+        # TODO: Turn this into a collection which can be listened to? With Thang models.
+        type: 'object'
+        description: 'Array of selected thangs'
+        properties: {
+          sprite: { description: 'Lank instance' }
+          thang: { description: 'Thang object generated by the world' }
+        }
+      }
+    }
+  }
+
+  defaults: -> {
+    selected: []
+    canDragCamera: true
+  }

app/views/editor/level/thangs/ThangsTabView.coffee

@@ -81,13 +81,13 @@ module.exports = class ThangsTabView extends CocoView
     @listenTo(@gameUIState, 'sprite:mouse-down', @onSpriteMouseDown)
     @listenTo(@gameUIState, 'surface:stage-mouse-move', @onStageMouseMove)
     @listenTo(@gameUIState, 'change:selected', @onChangeSelected)
-    @willRepositionCamera =true
 
     # should load depended-on Components, too
     @thangTypes = @supermodel.loadCollection(new ThangTypeSearchCollection(), 'thangs').model
     # just loading all Components for now: https://github.com/codecombat/codecombat/issues/405
     @componentCollection = @supermodel.loadCollection(new ComponentsCollection(), 'components').load()
     @level = options.level
+    @onThangsChanged = _.debounce(@onThangsChanged)
 
     $(document).bind 'contextmenu', @preventDefaultContextMenu
 
@@ -247,8 +247,9 @@ module.exports = class ThangsTabView extends CocoView
     @surface?.lankBoss?.selectLank null, null
 
   onStageMouseDown: (e) ->
-    @dragged = false
+    # initial values for a mouse click lifecycle
-    @willRepositionCamera = true
+    @dragged = 0
+    @willUnselectSprite = false
     @gameUIState.set('canDragCamera', true)
     
     if @addThangLank?.thangType.get('kind') is 'Wall'
@@ -258,48 +259,66 @@ module.exports = class ThangsTabView extends CocoView
     else if @addThangLank
       # We clicked on the background when we had an add Thang selected, so add it
       @addThang @addThangType, @addThangLank.thang.pos
-      @willRepositionCamera = false
       
     else if e.onBackground
-      @gameUIState.set('selected', null)
+      @gameUIState.set('selected', [])
 
   onStageMouseMove: (e) ->
-    @willRepositionCamera = false
+    @dragged += 1
 
   onStageMouseUp: (e) ->
-    if @willRepositionCamera
-      worldPos = @surface.camera.screenToWorld {x: e.originalEvent.rawX, y: e.originalEvent.rawY}
-      @surface.camera.zoomTo(@surface.camera.worldToSurface(worldPos), @surface.camera.zoom, 1000)
-
     @paintingWalls = false
     $('#contextmenu').hide()
 
   onSpriteMouseDown: (e) ->
+    nativeEvent = e.originalEvent.nativeEvent
     # update selection
-    # TODO: Handle key.shift, lankBoss.dragged property
+    selected = []
-    selected = null
+    if nativeEvent.metaKey or nativeEvent.ctrlKey
+      selected = _.clone(@gameUIState.get('selected'))
     if e.thang?.isSelectable
-      selected = { thang: e.thang, sprite: e.sprite, spellName: e.spellName }
+      alreadySelected = _.find(selected, (s) -> s.thang is e.thang)
-    if selected and (key.alt or key.meta)
+      if alreadySelected
+        # move to end (make it the last selected) and maybe unselect it
+        @willUnselectSprite = true
+        selected = _.without(selected, alreadySelected)
+      selected.push({ thang: e.thang, sprite: e.sprite, spellName: e.spellName })
+    if _.any(selected) and key.alt
       # Clone selected thang instead of selecting it
-      @willRepositionCamera = false
+      lastSelected = _.last(selected)
-      @selectAddThangType selected.thang.spriteName, selected.thang
+      @selectAddThangType lastSelected.thang.spriteName, lastSelected.thang
-      selected = null
+      selected = []
     @gameUIState.set('selected', selected)
-    if selected
+    if _.any(selected)
-      @willRepositionCamera = false
       @gameUIState.set('canDragCamera', false)
 
   onSpriteDragged: (e) ->
     selected = @gameUIState.get('selected')
-    return unless selected and e.thang?.id is selected.thang.id
+    return unless _.any(selected) and @dragged > 10
-    @dragged = true
+    @willUnselectSprite = false
-    @willRepositionCamera = false
     {stageX, stageY} = e.originalEvent
+
+    # move the one under the mouse
+    lastSelected = _.last(selected)
     cap = @surface.camera.screenToCanvas x: stageX, y: stageY
     wop = @surface.camera.canvasToWorld cap
-    wop.z = selected.thang.depth / 2
+    wop.z = lastSelected.thang.depth / 2
-    @adjustThangPos selected.sprite, selected.thang, wop
+    posBefore = _.clone(lastSelected.thang.pos)
+    @adjustThangPos lastSelected.sprite, lastSelected.thang, wop
+    posAfter = lastSelected.thang.pos
+
+    # move any others selected, proportionally to how the 'main' sprite moved
+    xDiff = posAfter.x - posBefore.x
+    yDiff = posAfter.y - posBefore.y
+    if xDiff or yDiff
+      for singleSelected in selected.slice(0, selected.length - 1)
+        newPos = {
+          x: singleSelected.thang.pos.x + xDiff
+          y: singleSelected.thang.pos.y + yDiff
+        }
+        @adjustThangPos singleSelected.sprite, singleSelected.thang, newPos
+
+    # move the camera if we're on the edge of the screen
     [w, h] = [@surface.camera.canvasWidth, @surface.camera.canvasHeight]
     sidebarWidths = ((if @$el.find(id).hasClass('hide') then 0 else (@$el.find(id).outerWidth() / @surface.camera.canvasScaleFactorX)) for id in ['#all-thangs', '#add-thangs-view'])
     w -= sidebarWidth for sidebarWidth in sidebarWidths
@@ -308,21 +327,28 @@ module.exports = class ThangsTabView extends CocoView
 
   onSpriteMouseUp: (e) ->
     selected = @gameUIState.get('selected')
-    if e.originalEvent.nativeEvent.button == 2 and selected
+    if e.originalEvent.nativeEvent.button == 2 and _.any(selected)
       @onSpriteContextMenu e
     clearInterval(@movementInterval) if @movementInterval?
     @movementInterval = null
     
-    return unless selected and e.thang?.id is selected.thang.id
+    return unless _.any(selected)
-    pos = selected.thang.pos
     
-    thang = _.find(@level.get('thangs') ? [], {id: selected.thang.id})
+    for singleSelected in selected
+      pos = singleSelected.thang.pos
+  
+      thang = _.find(@level.get('thangs') ? [], {id: singleSelected.thang.id})
       path = "#{@pathForThang(thang)}/components/original=#{LevelComponent.PhysicalID}"
       physical = @thangsTreema.get path
-    return if not physical or (physical.config.pos.x is pos.x and physical.config.pos.y is pos.y)
+      continue if not physical or (physical.config.pos.x is pos.x and physical.config.pos.y is pos.y)
       @thangsTreema.set path + '/config/pos', x: pos.x, y: pos.y, z: pos.z
       
+    if @willUnselectSprite
+      clickedSprite = _.find(selected, {sprite: e.sprite})
+      @gameUIState.set('selected', _.without(selected, clickedSprite))
+
   onSpriteDoubleClicked: (e) ->
+    return if @dragged > 10
     return unless e.thang
     @editThang thangID: e.thang.id
 
@@ -443,7 +469,6 @@ module.exports = class ThangsTabView extends CocoView
     @surface.lankBoss.update true  # Make sure Obstacle layer resets cache
 
   onSurfaceMouseMoved: (e) ->
-    @dragged = true
     return unless @addThangLank
     wop = @surface.camera.screenToWorld x: e.x, y: e.y
     wop.z = 0.5
@@ -497,8 +522,10 @@ module.exports = class ThangsTabView extends CocoView
   deleteSelectedExtantThang: (e) =>
     return if $(e.target).hasClass 'treema-node'
     selected = @gameUIState.get('selected')
-    return unless selected
+    return unless _.any(selected)
-    thang = @getThangByID(selected.thang.id)
+
+    for singleSelected in selected
+      thang = @getThangByID(singleSelected.thang.id)
       @thangsTreema.delete(@pathForThang(thang))
       @deleteEmptyTreema(thang)
       Thang.resetThangIDs()  # TODO: find some way to do this when we delete from treema, too
@@ -580,21 +607,25 @@ module.exports = class ThangsTabView extends CocoView
 
     # update selection, since the thangs have been remade
     selected = @gameUIState.get('selected')
-    if selected
+    if _.any(selected)
-      sprite = @surface.lankBoss.lanks[selected.thang.id]
+      for singleSelected in selected
+        sprite = @surface.lankBoss.lanks[singleSelected.thang.id]
         if sprite
-        thang = sprite.thang
+          sprite.updateMarks()
-        @gameUIState.set('selected', _.extend({}, selected, { sprite, thang }))
+          singleSelected.sprite = sprite
-      else
+          singleSelected.thang = sprite.thang
-        @gameUIState.set('selected', null)
     Backbone.Mediator.publish 'editor:thangs-edited', thangs: @world.thangs
 
   onTreemaThangSelected: (e, selectedTreemas) =>
-    selectedThangID = _.last(selectedTreemas)?.data.id
+    selectedThangTreemas = _.filter(selectedTreemas, (t) -> t instanceof ThangNode)
-    if selectedThangID isnt @gameUIState.get('selected')?.thang.id
+    thangIDs = (node.data.id for node in selectedThangTreemas)
-      @surface.lankBoss.selectThang selectedThangID, null, true
+    lanks = (@surface.lankBoss.lanks[thangID] for thangID in thangIDs when thangID) 
+    selected = ({ thang: lank.thang, sprite: lank } for lank in lanks when lank)
+    @gameUIState.set('selected', selected)
 
   onTreemaThangDoubleClicked: (e, treema) =>
+    nativeEvent = e.originalEvent.nativeEvent
+    return if nativeEvent and (nativeEvent.ctrlKey or nativeEvent.metaKey)
     id = treema?.data?.id
     @editThang thangID: id if id
 
@@ -675,7 +706,7 @@ module.exports = class ThangsTabView extends CocoView
 
   onDuplicateClicked: (e) ->
     $('#contextmenu').hide()
-    selected = @gameUIState.get('selected')
+    selected = _.last(@gameUIState.get('selected'))
     @selectAddThangType(selected.thang.spriteName, selected.thang)
 
   onClickRotationButton: (e) ->
@@ -704,19 +735,22 @@ module.exports = class ThangsTabView extends CocoView
     lank.setDebug true
 
   rotateSelectedThangTo: (radians) ->
-    selectedThang = @gameUIState.get('selected')?.thang
+    for singleSelected in @gameUIState.get('selected')
+      selectedThang = singleSelected.thang
       @modifySelectedThangComponentConfig selectedThang, LevelComponent.PhysicalID, (component) =>
         component.config.rotation = radians
         selectedThang.rotation = component.config.rotation
 
   rotateSelectedThangBy: (radians) ->
-    selectedThang = @gameUIState.get('selected')?.thang
+    for singleSelected in @gameUIState.get('selected')
+      selectedThang = singleSelected.thang
       @modifySelectedThangComponentConfig selectedThang, LevelComponent.PhysicalID, (component) =>
         component.config.rotation = ((component.config.rotation ? 0) + radians) % (2 * Math.PI)
         selectedThang.rotation = component.config.rotation
 
   moveSelectedThangBy: (xDir, yDir) ->
-    selectedThang = @gameUIState.get('selected')?.thang
+    for singleSelected in @gameUIState.get('selected')
+      selectedThang = singleSelected.thang
       @modifySelectedThangComponentConfig selectedThang, LevelComponent.PhysicalID, (component) =>
         component.config.pos.x += 0.5 * xDir
         component.config.pos.y += 0.5 * yDir
@@ -724,7 +758,8 @@ module.exports = class ThangsTabView extends CocoView
         selectedThang.pos.y = component.config.pos.y
 
   resizeSelectedThangBy: (xDir, yDir) ->
-    selectedThang = @gameUIState.get('selected')?.thang
+    for singleSelected in @gameUIState.get('selected')
+      selectedThang = singleSelected.thang
       @modifySelectedThangComponentConfig selectedThang, LevelComponent.PhysicalID, (component) =>
         component.config.width = (component.config.width ? 4) + 0.5 * xDir
         component.config.height = (component.config.height ? 4) + 0.5 * yDir
@@ -732,7 +767,8 @@ module.exports = class ThangsTabView extends CocoView
         selectedThang.height = component.config.height
 
   toggleSelectedThangCollision: ->
-    selectedThang = @gameUIState.get('selected')?.thang
+    for singleSelected in @gameUIState.get('selected')
+      selectedThang = singleSelected.thang
       @modifySelectedThangComponentConfig selectedThang, LevelComponent.CollidesID, (component) =>
         component.config ?= {}
         component.config.collisionCategory = if component.config.collisionCategory is 'none' then 'ground' else 'none'

test/app/lib/surface/Camera.spec.coffee

@@ -96,24 +96,6 @@ describe 'Camera (Surface point of view)', ->
                 checkConversionsFromWorldPos wop, cam
                 checkCameraPos cam, wop
 
-  it 'works at 90 degrees', ->
-    cam = new Camera {attr: (attr) -> 100}, Math.PI / 2
-    expect(cam.x2y).toBeCloseTo 1
-    expect(cam.x2z).toBeGreaterThan 9001
-    expect(cam.z2y).toBeCloseTo 0
-
-  it 'works at 0 degrees', ->
-    cam = new Camera {attr: (attr) -> 100}, 0
-    expect(cam.x2y).toBeGreaterThan 9001
-    expect(cam.x2z).toBeCloseTo 1
-    expect(cam.z2y).toBeGreaterThan 9001
-
-  it 'works at 45 degrees', ->
-    cam = new Camera {attr: (attr) -> 100}, Math.PI / 4
-    expect(cam.x2y).toBeCloseTo Math.sqrt(2)
-    expect(cam.x2z).toBeCloseTo Math.sqrt(2)
-    expect(cam.z2y).toBeCloseTo 1
-
   it 'works at default angle of asin(0.75) ~= 48.9 degrees', ->
     cam = new Camera {attr: (attr) -> 100}, null
     angle = Math.asin(3 / 4)

test/app/lib/surface/LankBoss.spec.coffee

@@ -2,6 +2,7 @@ LankBoss = require 'lib/surface/LankBoss'
 Camera = require 'lib/surface/Camera'
 World = require 'lib/world/world'
 ThangType = require 'models/ThangType'
+GameUIState = require 'models/GameUIState'
 
 treeData = require 'test/app/fixtures/tree1.thang.type'
 munchkinData = require 'test/app/fixtures/ogre-munchkin-m.thang.type'
@@ -53,6 +54,7 @@ describe 'LankBoss', ->
       surfaceTextLayer: new createjs.Container()
       world: world
       thangTypes: thangTypes
+      gameUIState: new GameUIState()
     }
     
     window.lankBoss = lankBoss = new LankBoss(options)