From a76225dc7f8ec707fc2dc563a796c65620b1c5a4 Mon Sep 17 00:00:00 2001
From: timb <opuscule@gmail.com>
Date: Wed, 22 Jul 2015 00:25:07 -0700
Subject: finally hook up undo

---
 js/draw.js | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

(limited to 'js/draw.js')

diff --git a/js/draw.js b/js/draw.js
index f12fbe9..77e149b 100644
--- a/js/draw.js
+++ b/js/draw.js
@@ -48,11 +48,13 @@ var draw = (function(){
       s = round( s + x-hh )
       t = round( t + y-hh )
       if (lex.opacity > 0 && s >= 0 && s < canvas.w && t >= 0 && t < canvas.h) {
+        var aa = canvas.aa[t][s]
+        undo.save_lex(s, t, aa)
         if (erasing) {
-          canvas.aa[t][s].erase(lex)
+          aa.erase(lex)
         }
         else {
-          canvas.aa[t][s].paint(lex)
+          aa.paint(lex)
         }
       }
     })
@@ -60,20 +62,21 @@ var draw = (function(){
   
   function fill (lex, x, y) {
     var q = [ [x,y] ]
-    var target = canvas.aa[y][x].clone()
+    var aa = canvas.aa
+    var target = aa[y][x].clone()
     var n, w = 0, e = 0, j = 0
     var kk = 0
     // gets into a weird infinite loop if we don't break here.. :\
     if (target.eq(lex)) { return }
     LOOP: while (q.length) {
       n = q.shift()
-      if (canvas.aa[n[1]][n[0]].ne(target)) {
+      if (aa[n[1]][n[0]].ne(target)) {
         continue LOOP
       }
       w = e = n[0]
       j = n[1]
       WEST: while (w > 0) {
-        if (canvas.aa[j][w-1].eq(target)) {
+        if (aa[j][w-1].eq(target)) {
           w = w-1
         }
         else {
@@ -81,7 +84,7 @@ var draw = (function(){
         }
       }
       EAST: while (e < canvas.w-1) {
-        if (canvas.aa[j][e+1].eq(target)) {
+        if (aa[j][e+1].eq(target)) {
           e = e+1
         }
         else {
@@ -89,11 +92,12 @@ var draw = (function(){
         }
       }
       for (var i = w; i <= e; i++) {
-        canvas.aa[j][i].assign(lex)
-        if (j > 0 && canvas.aa[j-1][i].eq(target)) {
+        undo.save_lex(i, j, aa[j][i])
+        aa[j][i].assign(lex)
+        if (j > 0 && aa[j-1][i].eq(target)) {
           q.push([ i, j-1 ])
         }
-        if (j < canvas.h-1 && canvas.aa[j+1][i].eq(target)) {
+        if (j < canvas.h-1 && aa[j+1][i].eq(target)) {
           q.push([ i, j+1 ])
         }
       }
-- 
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