Spell palette now hugs the spell editor, which itself shrinks as needed.

app/lib/aether_utils.coffee

@@ -44,8 +44,10 @@ functionParameters =
   evaluateBoard: ['board', 'player']
   getPossibleMoves: ['board']
   minimax_alphaBeta: ['board', 'player', 'depth', 'alpha', 'beta']
+  distanceTo: ['target']
 
   chooseAction: []
   plan: []
   initializeCentroids: []
   update: []
+  getNearestEnemy: []

app/styles/play/level/tome/problem_alert.sass

@@ -4,7 +4,8 @@
 .problem-alert
   z-index: 10
   position: absolute
-  bottom: -135px
+  // Position these at the end of the spell editor, right above the spell toolbar.
+  bottom: -20px
   left: 10px
   right: 10px
   background: transparent

app/styles/play/level/tome/spell.sass

@@ -12,9 +12,8 @@
   position: absolute
   left: 10px
   top: 48px
-  bottom: 121px
-  // Bottom relates to .palette height and padding-top
   right: 10px
+  padding-bottom: 10px
   z-index: 1
   // Set z-index above palette
   display: none
@@ -62,9 +61,6 @@
     line-height: 20px
     overflow: visible
 
-    &.user-code-problem.spell-cast
-      @include editor-height(60px)
-
     &.disabled
       @include opacity(80)
       .ace_cursor

app/styles/play/level/tome/spell_palette.sass

@@ -3,10 +3,10 @@
 
 #spell-palette-view
   position: absolute
-  bottom: 10px
+  padding-bottom: 10px
   left: 10px
   right: 10px
-  height: 140px
+  //height: 140px
   // Height relates to .tab-content height
   padding-top: 35px
   padding-left: 12px

app/views/play/level/tome/SpellPaletteView.coffee

@@ -48,6 +48,10 @@ module.exports = class SpellPaletteView extends CocoView
     $('.nano').nanoScroller()
     @updateCodeLanguage @options.language
 
+  afterInsert: ->
+    super()
+    _.delay => @$el?.css('bottom', 0) unless $('#spell-view').is('.shown')
+
   updateCodeLanguage: (language) ->
     @options.language = language
     @$el.find('.code-language-logo').removeClass().addClass 'code-language-logo ' + language

app/views/play/level/tome/SpellView.coffee

@@ -65,6 +65,7 @@ module.exports = class SpellView extends CocoView
     @problems = []
     @writable = false unless me.team in @spell.permissions.readwrite  # TODO: make this do anything
     @highlightCurrentLine = _.throttle @highlightCurrentLine, 100
+    $(window).on 'resize', @onWindowResize
 
   afterRender: ->
     super()
@@ -281,6 +282,8 @@ module.exports = class SpellView extends CocoView
 
   setThang: (thang) ->
     @focus()
+    @lastScreenLineCount = null
+    @updateLines()
     return if thang.id is @thang?.id
     @thang = thang
     @spellThang = @spell.thangs[@thang.id]
@@ -305,6 +308,31 @@ module.exports = class SpellView extends CocoView
     return if @aceDoc.undergoingFirepadOperation  # from my Firepad ACE adapter
     Backbone.Mediator.publish 'tome:editing-began', {}
 
+  updateLines: =>
+    # Make sure there are always blank lines for the player to type on, and that the editor resizes to the height of the lines.
+    lineCount = @aceDoc.getLength()
+    lastLine = @aceDoc.$lines[lineCount - 1]
+    if lastLine isnt ''
+      cursorPosition = @ace.getCursorPosition()
+      wasAtEnd = cursorPosition.row is lineCount - 1 and cursorPosition.column is lastLine.length
+      @aceDoc.insertNewLine row: lineCount, column: 0  #lastLine.length
+      @ace.navigateLeft(1) if wasAtEnd
+      ++lineCount
+    screenLineCount = @aceSession.getScreenLength()
+    if screenLineCount isnt @lastScreenLineCount
+      @lastScreenLineCount = screenLineCount
+      lineHeight = @ace.renderer.lineHeight or 20
+      tomeHeight = $('#tome-view').innerHeight()
+      spellListTabEntryHeight = $('#spell-list-tab-entry-view').outerHeight()
+      spellToolbarHeight = $('.spell-toolbar-view').outerHeight()
+      spellPaletteHeight = $('#spell-palette-view').outerHeight()
+      maxHeight = tomeHeight - spellListTabEntryHeight - spellToolbarHeight - spellPaletteHeight
+      linesAtMaxHeight = Math.floor(maxHeight / lineHeight)
+      lines = Math.max 8, Math.min(screenLineCount + 4, linesAtMaxHeight)
+      # 2 lines buffer is nice, but 4 leaves room to put problem alerts.
+      @ace.setOptions minLines: lines, maxLines: lines
+      $('#spell-palette-view').css('top', 38 + 45 + lineHeight * lines)  # Move spell palette up, slightly underlapping us.
+
   onManualCast: (e) ->
     cast = @$el.parent().length
     @recompile cast, e.realTime
@@ -361,6 +389,7 @@ module.exports = class SpellView extends CocoView
       _.debounce @notifyEditingEnded, 1000
       _.throttle @notifyEditingBegan, 250
       _.throttle @notifySpellChanged, 300
+      _.throttle @updateLines, 500
     ]
     @onCodeChangeMetaHandler = =>
       return if @eventsSuppressed
@@ -695,7 +724,15 @@ module.exports = class SpellView extends CocoView
     @ace.setValue pretty
 
   onMaximizeToggled: (e) ->
-    _.delay (=> @ace?.resize true), 500  # Wait $level-resize-transition-time.
+    _.delay (=> @resize()), 500 + 100  # Wait $level-resize-transition-time, plus a bit.
+
+  onWindowResize: (e) =>
+    _.delay (=> @resize?()), 500 + 100  # Wait $level-resize-transition-time, plus a bit.
+
+  resize: ->
+    @ace?.resize true
+    @lastScreenLineCount = null
+    @updateLines()
 
   onChangeEditorConfig: (e) ->
     aceConfig = me.get('aceConfig') ? {}
@@ -739,4 +776,5 @@ module.exports = class SpellView extends CocoView
     @aceSession?.selection.off 'changeCursor', @onCursorActivity
     @destroyAceEditor(@ace)
     @debugView?.destroy()
+    $(window).off 'resize', @onWindowResize
     super()

app/views/play/level/tome/TomeView.coffee

@@ -181,6 +181,7 @@ module.exports = class TomeView extends CocoView
     @spellTabView = null
     @removeSubView @spellPaletteView if @spellPaletteView
     @spellPaletteView = null
+    @$el.find('#spell-palette-view').hide()
     @castButton?.$el.hide()
     @thangList?.$el.show()
 
@@ -204,10 +205,10 @@ module.exports = class TomeView extends CocoView
       @castButton.attachTo @spellView
       @thangList?.$el.hide()
       Backbone.Mediator.publish 'tome:spell-shown', thang: thang, spell: spell
+    @updateSpellPalette thang, spell
     @spellList.setThangAndSpell thang, spell
     @spellView?.setThang thang
     @spellTabView?.setThang thang
-    @updateSpellPalette thang, spell
 
   updateSpellPalette: (thang, spell) ->
     return unless thang and @spellPaletteView?.thang isnt thang and thang.programmableProperties or thang.apiProperties