Added marker, symbol and dynamic referencing

1 files changed, 80 insertions, 0 deletions

diff --git a/src/marker.js b/src/marker.js
new file mode 100644
index 0000000..30b09a4
--- /dev/null
+++ b/src/marker.js
@@ -0,0 +1,80 @@
+SVG.Marker = SVG.invent({
+  // Initialize node
+  create: 'marker'
+
+  // Inherit from
+, inherit: SVG.Container
+
+  // Add class methods
+, extend: {
+    // Set width of element
+    width: function(width) {
+      return this.attr('markerWidth', width)
+    }
+    // Set height of element
+  , height: function(height) {
+      return this.attr('markerHeight', height)
+    }
+    // Set marker refX and refY
+  , ref: function(x, y) {
+      return this.attr('refX', x).attr('refY', y)
+    }
+    // Update marker
+  , update: function(block) {
+      /* remove all content */
+      this.clear()
+      
+      /* invoke passed block */
+      if (typeof block == 'function')
+        block.call(this, this)
+      
+      return this
+    }
+    // Return the fill id
+  , toString: function() {
+      return 'url(#' + this.id() + ')'
+    }
+  }
+
+  // Add parent method
+, construct: {
+    marker: function(width, height, block) {
+      // Create marker element in defs
+      return this.defs().marker(width, height, block)
+    }
+  }
+
+})
+
+SVG.extend(SVG.Defs, {
+  // Create marker
+  marker: function(width, height, block) {
+    // Set default viewbox to match the width and height, set ref to cx and cy and set orient to auto
+    return this.put(new SVG.Marker)
+      .size(width, height)
+      .ref(width / 2, height / 2)
+      .viewbox(0, 0, width, height)
+      .attr('orient', 'auto')
+      .update(block)
+  }
+  
+})
+
+SVG.extend(SVG.Line, SVG.Polyline, SVG.Polygon, SVG.Path, {
+  // Create and attach markers
+  marker: function(marker, width, height, block) {
+    var attr = ['marker']
+
+    // Build attribute name
+    if (marker != 'all') attr.push(marker)
+    attr = attr.join('-')
+
+    // Set marker attribute
+    marker = arguments[1] instanceof SVG.Marker ?
+      arguments[1] :
+      this.doc().marker(width, height, block)
+    
+    return this.attr(attr, marker)
+  }
+  
+})
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