🏃 applying styles on tile load, filtering unstyled features, caching style

src/Renderer.coffee

@@ -87,6 +87,7 @@ module.exports = class Renderer
 
   loadStyleFile: (file) ->
     @styler = new Styler file
+    @tileSource.useStyler @styler
 
   setSize: (@width, @height) ->
     @canvas = new Canvas @width, @height
@@ -173,7 +174,7 @@ module.exports = class Renderer
     features = {}
     for layer in @config.drawOrder
       continue unless tile.data.layers?[layer]
-      features[layer] = tile.data.layers[layer].tree.search box
+      features[layer] = tile.data.layers[layer].search box
 
     tile.features = features
     tile
@@ -182,8 +183,6 @@ module.exports = class Renderer
     drawn = {}
 
     for layer in @config.drawOrder
-      short = layer.split(":")[0]
-
       for tile in tiles
         continue unless tile.features[layer]?.length
 
@@ -191,10 +190,10 @@ module.exports = class Renderer
         @canvas.translate tile.position.x, tile.position.y
 
         for feature in tile.features[layer]
-          continue if feature.data.id and drawn[feature.data.id]
-          drawn[feature.data.id] = true
+          continue if feature.id and drawn[feature.id]
+          drawn[feature.id] = true
 
-          @_drawFeature short, feature, tile.scale, tile.zoom
+          @_drawFeature layer, feature, tile.scale, tile.zoom
 
         @canvas.restore()
 
@@ -210,17 +209,12 @@ module.exports = class Renderer
 
   _scaleAtZoom: (zoom) ->
     baseZoom = Math.min @config.maxZoom, Math.floor Math.max 0, zoom
-    (@config.tileSize/@config.projectSize)/Math.pow(2, zoom-baseZoom)
+    @config.tileSize / @config.projectSize / Math.pow(2, zoom-baseZoom)
 
-  _drawFeature: (layer, data, scale, zoom) ->
-    feature = data.data
+  _drawFeature: (layer, feature, scale, zoom) ->
+    style = feature.style
 
-    # TODO: this is ugly :) need to be fixed @style
-    #return false if feature.properties.class is "ferry"
-    feature.type = "LineString" if layer is "building" or layer is "road"
-
-    unless style = @styler.getStyleFor layer, feature, zoom
-      return false
+    return false if style.minzoom and zoom < style.minzoom
 
     toDraw = (@_scaleAndReduce points, scale for points in feature.points)
 

src/Styler.coffee

@@ -32,11 +32,10 @@ module.exports = class Styler
       @styleById[style.id] = style
 
   getStyleFor: (layer, feature, zoom) ->
-    # Skip all layers that don't have any styles set
     return false unless @styleByLayer[layer]
 
     for style in @styleByLayer[layer]
-      if style.appliesTo(feature) and ((not style.minzoom) or style.minzoom <= zoom)
+      if style.appliesTo feature
           return style
 
     return false

src/Termap.coffee

@@ -172,6 +172,7 @@ module.exports = class Termap
       # display debug info for unhandled keys
       @notify JSON.stringify key
 
+  drawn: 0
   _draw: ->
     @renderer
     .draw @center, @zoom
@@ -180,6 +181,8 @@ module.exports = class Termap
       @notify @_getFooter()
     .catch =>
       @notify "renderer is busy"
+    # .then =>
+    #   @_draw() if @drawn++ < 20
 
   _getFooter: ->
     # features = @renderer.featuresAt @mousePosition.x-1-(@view[0]>>1), @mousePosition.y-1-(@view[1]>>2)

src/Tile.coffee

@@ -14,9 +14,11 @@ rbush = require 'rbush'
 class Tile
   layers: {}
 
+  constructor: (@styler) ->
+
   load: (buffer) ->
     @_unzipIfNeeded buffer
-    .then (data) => @_loadTile data
+    .then (buffer) => @_loadTile buffer
     .then (tile) => @_loadLayers tile
     .then => this
 
@@ -45,26 +47,19 @@ class Tile
 
         feature = layer.feature i
 
-        type = feature.properties.$type =
+        feature.properties.$type = type =
           [undefined, "Point", "LineString", "Polygon"][feature.type]
 
-        # TODO: monkey patching test case for tiles with a reduced extent
-        geo = for sub, i in feature.loadGeometry()
-          points = []
-          last = null
-          for point, j in sub
-            p =
-              x: Math.floor point.x/8
-              y: Math.floor point.y/8
+        if @styler
+           style = @styler.getStyleFor name, feature
+           continue unless style
 
-            if last and last.x is p.x and last.y is p.y
-              continue
-            points.push p
-            last = p
-          points
+        # TODO: monkey patching test case for tiles with a reduced extent
+        points = @_reduceGeometry feature, 8
 
         data =
-          points: geo
+          style: style
+          points: points
           properties: feature.properties
           id: feature.id
           type: type
@@ -72,7 +67,7 @@ class Tile
         @_addToTree tree, data
         data
 
-      layers[name] = tree: tree, features: features
+      layers[name] = tree
 
     @layers = layers
 
@@ -85,11 +80,27 @@ class Tile
         minY = p.y if p.y < minY
         maxY = p.y if p.y > maxY
 
-    tree.insert
-      minX: minX
-      maxX: maxX
-      minY: minY
-      maxY: maxY
-      data: data
+    data.minX = minX
+    data.maxX = maxX
+    data.minY = minY
+    data.maxY = maxY
+
+    tree.insert data
+
+  _reduceGeometry: (feature, factor) ->
+    for points, i in feature.loadGeometry()
+      reduced = []
+      last = null
+      for point, j in points
+        p =
+          x: Math.floor point.x/factor
+          y: Math.floor point.y/factor
+
+        if last and last.x is p.x and last.y is p.y
+          continue
+
+        reduced.push last = p
+
+      reduced
 
 module.exports = Tile

src/TileSource.coffee

@@ -34,8 +34,8 @@ module.exports = class TileSource
     HTTP: 3
 
   mode: null
-
   mbtiles: null
+  styler: null
 
   init: (@source) ->
     if @source.startsWith "http"
@@ -59,6 +59,8 @@ module.exports = class TileSource
         if err then reject err
         else resolve()
 
+  useStyler: (@styler) ->
+
   getTile: (z, x, y) ->
     unless @mode
       throw new Error "no TileSource defined"
@@ -95,7 +97,7 @@ module.exports = class TileSource
         resolve @_createTile z, x, y, buffer
 
   _createTile: (z, x, y, buffer) ->
-    tile = @cache[[z,x,y].join("-")] = new Tile()
+    tile = @cache[[z,x,y].join("-")] = new Tile @styler
     tile.load buffer
 
   _initPersistence: ->