Change setSelection to set cursor to the end of the previous value block OR to the beginning of the pattern

Examples
1) Given a pattern of '----- [[11 1111 ]]-' and a value of '23  45' (the input shows '----- [[23 _45_ ]]-')
  a) a selection anywhere after '5' will set the cursor immediately after the '5'
  b) a selection between '3' and '4' will set the cursor immediately after the '3'
  c) a selection anywhere before '2' will set the cursor immediately before the '2'
  d) a selection between '2' and '3' will not change
2) Given a pattern of '----- [[11 1111 ]]-' and no value (the input shows '----- [[__ ____ ]]-')
  a) a selection anywhere will set the cursor to the beginning of the pattern

Author: Nick Gard

lib/index.js

@@ -263,7 +263,6 @@ InputMask.prototype.input = function input(char) {
   // History
   if (this._historyIndex != null) {
     // Took more input after undoing, so blow any subsequent history away
-    console.log('splice(', this._historyIndex, this._history.length - this._historyIndex, ')')
     this._history.splice(this._historyIndex, this._history.length - this._historyIndex)
     this._historyIndex = null
   }
@@ -461,10 +460,19 @@ InputMask.prototype.setSelection = function setSelection(selection) {
       this.selection.start = this.selection.end = this.pattern.firstEditableIndex
       return true
     }
-    if (this.selection.end > this.pattern.lastEditableIndex + 1) {
-      this.selection.start = this.selection.end = this.pattern.lastEditableIndex + 1
-      return true
+    // Set selection to the first editable, non-placeholder character before the selection
+    // OR to the beginning of the pattern
+    var index = this.selection.start
+    while (index >= this.pattern.firstEditableIndex) {
+      if (this.pattern.isEditableIndex(index - 1) &&
+          this.value[index - 1] !== this.placeholderChar ||
+          index === this.pattern.firstEditableIndex) {
+        this.selection.start = this.selection.end = index
+        break
+      }
+      index--
     }
+    return true
   }
   return false
 }

test/index.js

@@ -348,7 +348,7 @@ test('Pasting with leading static pattern in selection', function(t) {
 })
 
 test('Setting selection', function(t) {
-  t.plan(8)
+  t.plan(16)
 
   var mask = new InputMask({pattern: '----- [[11 1111 ]]-'})
   t.equal(mask.pattern.firstEditableIndex, 8, 'First editable index calculation')
@@ -358,10 +358,24 @@ test('Setting selection', function(t) {
   t.deepEqual(mask.selection, {start: 8, end: 8}, 'Cursor placed at first editable character')
   // ...or beyond the last editable character
   t.true(mask.setSelection({start: 18, end: 18}), 'Cursor after editable region is changed')
-  t.deepEqual(mask.selection, {start: 15, end: 15}, 'Cursor placed after last editable character')
+  t.deepEqual(mask.selection, {start: 8, end: 8}, 'Cursor placed after last editable character')
   // ...however a selection can span beyond the editable region
   t.false(mask.setSelection({start: 0, end: 19}), 'Selection beyond editable region not changed')
   t.deepEqual(mask.selection, {start: 0, end: 19}, 'Whole value can be selected')
+
+  var mask = new InputMask({pattern: '----- [[11 1111 ]]-', value: '23  45'})
+  // Setting the selection before the first editable index moves selection to first editable index
+  t.true(mask.setSelection({start: 0, end: 0}), 'Cursor before editable region, regardless of value, is changed')
+  t.deepEqual(mask.selection, {start: 8, end: 8}, 'Cursor placed at first editable character, regardless of value')
+  // Setting the selection within the value works as expected
+  t.true(mask.setSelection({start: 9, end: 9}), 'Cursor within value is not changed')
+  t.deepEqual(mask.selection, {start: 9, end: 9}, 'Cursor stays within value')
+  // Setting the selection after the last editable index moves selection to the next editable index after the last value
+  t.true(mask.setSelection({start: 18, end: 18}), 'Cursor after editable region is changed, regardless of value')
+  t.deepEqual(mask.selection, {start: 14, end: 14}, 'Cursor placed at first editable character after last value')
+  // Setting the selection after (but not within) a value moves selection to the next editable index after the previous value
+  t.true(mask.setSelection({start: 11, end: 11}), 'Cursor after editable region with values both before and after it is changed')
+  t.deepEqual(mask.selection, {start: 10, end: 10}, 'Cursor placed at first editable character after prior value')
 })
 
 test('History', function(t) {