1 files changed, 46 insertions, 0 deletions
diff --git a/debian/missing-sources/epoch/src/basic/line.coffee b/debian/missing-sources/epoch/src/basic/line.coffee
new file mode 100644
index 0000000..de56780
--- /dev/null
+++ b/debian/missing-sources/epoch/src/basic/line.coffee
@@ -0,0 +1,46 @@
+# Static line chart implementation (using d3).
+class Epoch.Chart.Line extends Epoch.Chart.Plot
+  constructor: (@options={}) ->
+    @options.type ?= 'line'
+    super(@options)
+    @draw()
+
+  # @return [Function] The line generator used to construct the plot.
+  line: (layer) ->
+    [x, y] = [@x(), @y(layer.range)]
+    d3.svg.line()
+      .x((d) -> x(d.x))
+      .y((d) -> y(d.y))
+
+  # Draws the line chart.
+  draw: ->
+    [x, y, layers] = [@x(), @y(), @getVisibleLayers()]
+
+    # Zero visible layers, just drop all and get out
+    if layers.length == 0
+      return @g.selectAll('.layer').remove()
+
+    # 1) Join
+    layer = @g.selectAll('.layer')
+      .data(layers, (d) -> d.category)
+
+    # 2) Update (only existing)
+    layer.select('.line').transition().duration(500)
+      .attr('d', (l) => @line(l)(l.values))
+
+    # 3) Enter (Create)
+    layer.enter().append('g')
+      .attr('class', (l) -> l.className)
+      .append('path')
+        .attr('class', 'line')
+        .attr('d', (l) => @line(l)(l.values))
+
+    # 4) Update (existing & new)
+    # Nuuupp
+
+    # 5) Exit (Remove)
+    layer.exit().transition().duration(750)
+      .style('opacity', '0')
+      .remove()
+
+    super()