Show the adder button when deployed with an existing selection

To achieve this, updated Annotator's TextAnchors plugin to 989382f5
(typed-packaging branch).

Closes #422

h/lib/_annotator_mapsrc/src/plugin/textanchors.coffee

@@ -110,6 +110,9 @@ class Annotator.Plugin.TextAnchors extends Annotator.Plugin
     @annotator.TextPositionAnchor = TextPositionAnchor
     @annotator.TextRangeAnchor = TextRangeAnchor
 
+    # Trigger an annotation if we have a currently valid selection
+    setTimeout (=> @checkForEndSelection({})), 1000
+
     null
 
 
@@ -189,6 +192,18 @@ class Annotator.Plugin.TextAnchors extends Annotator.Plugin
 
     if selectedRanges.length
       event.targets = (@getTargetFromRange(r) for r in selectedRanges)
+
+      # Do we have valid page coordinates inside the event
+      # which has triggered this function?
+      unless event.pageX
+        # No, we don't. Adding fake coordinates
+        node = selectedRanges[0].end
+        while not node.getBoundingClientRect?
+          node = node.parentNode
+        pos = node.getBoundingClientRect()
+        event.pageX = pos.right
+        event.pageY = pos.bottom
+
       @annotator.onSuccessfulSelection event
     else
       @annotator.onFailedSelection event

h/lib/annotator.textanchors.js

 // Generated by CoffeeScript 1.6.3
 /*
-** Annotator 1.2.6-dev-2c4dc62
+** Annotator 1.2.6-dev-e2e98dd
 ** https://github.com/okfn/annotator/
 **
 ** Copyright 2012 Aron Carroll, Rufus Pollock, and Nick Stenning.
 ** Dual licensed under the MIT and GPLv3 licenses.
 ** https://github.com/okfn/annotator/blob/master/LICENSE
 **
-** Built at: 2013-11-25 18:28:53Z
+** Built at: 2013-11-26 13:26:27Z
 */
 
 
@@ -93,6 +93,7 @@
     };
 
     TextAnchors.prototype.pluginInit = function() {
+      var _this = this;
       if (!this.annotator.plugins.TextHighlights) {
         throw "The TextAnchors Annotator plugin requires the TextHighlights plugin.";
       }
@@ -111,6 +112,9 @@
       });
       this.annotator.TextPositionAnchor = TextPositionAnchor;
       this.annotator.TextRangeAnchor = TextRangeAnchor;
+      setTimeout((function() {
+        return _this.checkForEndSelection({});
+      }), 1000);
       return null;
     };
 
@@ -149,7 +153,7 @@
     };
 
     TextAnchors.prototype.checkForEndSelection = function(event) {
-      var container, r, range, selectedRanges, _i, _len;
+      var container, node, pos, r, range, selectedRanges, _i, _len;
       this.annotator.mouseIsDown = false;
       if (this.annotator.ignoreMouseup) {
         return;
@@ -175,6 +179,15 @@
           }
           return _results;
         }).call(this);
+        if (!event.pageX) {
+          node = selectedRanges[0].end;
+          while (node.getBoundingClientRect == null) {
+            node = node.parentNode;
+          }
+          pos = node.getBoundingClientRect();
+          event.pageX = pos.right;
+          event.pageY = pos.bottom;
+        }
         return this.annotator.onSuccessfulSelection(event);
       } else {
         return this.annotator.onFailedSelection(event);