1 files changed, 69 insertions, 2 deletions
diff --git a/js/ui/selection.js b/js/ui/selection.js
index cbeb051..f1e7e5e 100644
--- a/js/ui/selection.js
+++ b/js/ui/selection.js
@@ -1,6 +1,8 @@
 var selection = (function(){
 
-	var selection = new Matrix (1, 1, function(x,y){
+  var creating = false, moving = false, copying = false
+  
+	var selection_canvas = new Matrix (1, 1, function(x,y){
 		var lex = new Lex (x,y)
 		lex.build()
 		return lex
@@ -15,7 +17,72 @@ var selection = (function(){
   // - drag the selection to move it -- this "cuts" it and leaves a blank space on the canvas.
   // - shift-drag the selection to copy it
   
-
+  var corner = [-1, -1]
+  var dimensions = [0, 0]
+  
+  function contains (point) {
+    var contains_x = corner[0] < point[0] && point[0] < corner[0] + dimensions[0]
+    var contains_y = corner[1] < point[1] && point[1] < corner[1] + dimensions[1]
+    return (contains_x && contains_y)
+  }
+  function reposition () {
+    var top_left = canvas.aa[corner[1]][corner[0]].span
+    var left = top_left.offsetLeft
+    var top = top_left.offsetTop
+    var width = top_left.offsetWidth
+    var height = top_left.offsetHeight
+  }
+  function down (e, lex, point){
+    if (contains(point)) {
+      copying = false
+      moving = true
+      creating = false
+    }
+    else {
+      copying = false
+      moving = false
+      creating = true
+      corner[0] = point[0]
+      corner[1] = point[1]
+      dimensions[0] = 1
+      dimensions[1] = 1
+    }
+    show()
+    reposition()
+  }
+  function move (e, lex, point){
+    if (creating) {
+      var x = point[0] - corner[0]
+      var y = point[1] - corner[1]
+      if (x < 0) {
+        corner[0] = point[0]
+      }
+      if (y < 0) {
+        corner[0] = point[0]
+      }
+      dimensions[0] = abs(x)
+      reposition()
+    }
+    else if (moving) {
+    }
+  }
+  function up (e) {
+  }
+  
+  function show () {
+    selecting = true
+  }
+  function hide () {
+    selecting = false
+  }
+  
+  var selection = {}
+  selection.down = down
+  selection.move = move
+  selection.up = up
+  selection.canvas = selection_canvas
+  selection.show = show
+  selection.hide = hide
 	return selection
 
 })()