1 files changed, 80 insertions, 0 deletions
diff --git a/debian/missing-sources/epoch/src/time/area.coffee b/debian/missing-sources/epoch/src/time/area.coffee
new file mode 100644
index 0000000..22bf9db
--- /dev/null
+++ b/debian/missing-sources/epoch/src/time/area.coffee
@@ -0,0 +1,80 @@
+
+# Real-time stacked area chart implementation.
+class Epoch.Time.Area extends Epoch.Time.Stack
+  constructor: (@options={}) ->
+    @options.type ?= 'time.area'
+    super(@options)
+    @draw()
+
+  # Sets the appropriate styles to the graphics context given a particular layer.
+  # @param [Object] layer Layer for which to set the styles.
+  setStyles: (layer) ->
+    if layer? && layer.className?
+      styles = @getStyles "g.#{layer.className.replace(/\s/g,'.')} path.area"
+    else
+      styles = @getStyles "g path.area"
+    @ctx.fillStyle = styles.fill
+    if styles.stroke?
+      @ctx.strokeStyle = styles.stroke
+    if styles['stroke-width']?
+      @ctx.lineWidth = styles['stroke-width'].replace('px', '')
+
+  # Draws areas for the chart
+  _drawAreas: (delta=0) ->
+    [y, w, layers] = [@y(), @w(), @getVisibleLayers()]
+
+    for i in [layers.length-1..0]
+      continue unless (layer = layers[i])
+
+      @setStyles layer
+      @ctx.beginPath()
+
+      [j, k, trans] = [@options.windowSize, layer.values.length, @inTransition()]
+      firstX = null
+      while (--j >= -2) and (--k >= 0)
+        entry = layer.values[k]
+        args = [(j+1)*w+delta, y(entry.y + entry.y0)]
+        args[0] += w if trans
+        if i == @options.windowSize - 1
+          @ctx.moveTo.apply @ctx, args
+        else
+          @ctx.lineTo.apply @ctx, args
+
+      if trans
+        borderX = (j+3)*w+delta
+      else
+        borderX = (j+2)*w+delta
+
+      @ctx.lineTo(borderX, @innerHeight())
+      @ctx.lineTo(@width*@pixelRatio+w+delta, @innerHeight())
+      @ctx.closePath()
+      @ctx.fill()
+
+  # Draws strokes for the chart
+  _drawStrokes: (delta=0) ->
+    [y, w, layers] = [@y(), @w(), @getVisibleLayers()]
+
+    for i in [layers.length-1..0]
+      continue unless (layer = layers[i])
+      @setStyles layer
+      @ctx.beginPath()
+
+      [i, k, trans] = [@options.windowSize, layer.values.length, @inTransition()]
+      firstX = null
+      while (--i >= -2) and (--k >= 0)
+        entry = layer.values[k]
+        args = [(i+1)*w+delta, y(entry.y + entry.y0)]
+        args[0] += w if trans
+        if i == @options.windowSize - 1
+          @ctx.moveTo.apply @ctx, args
+        else
+          @ctx.lineTo.apply @ctx, args
+
+      @ctx.stroke()
+
+  # Draws the area chart.
+  draw: (delta=0) ->
+    @clear()
+    @_drawAreas(delta)
+    @_drawStrokes(delta)
+    super()