Add comments to ledge bugfix.

JaviSoto · Feb 9, 2012 · c5bc634 · c5bc634
1 parent 97d63f4
commit c5bc634
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/ViewDeck/IIViewDeckController.m b/ViewDeck/IIViewDeckController.m
@@ -259,6 +259,8 @@ - (CGSize)slidingSizeForOffset:(CGFloat)offset {
 #pragma mark - ledges
 
 - (void)setLeftLedge:(CGFloat)leftLedge {
+    // Compute the final ledge in two steps. This prevents a strange bug where
+    // nesting MAX(X, MIN(Y, Z)) with miniscule referenceBounds returns a bogus near-zero value.
     CGFloat minLedge = MIN(self.referenceBounds.size.width, leftLedge);
     leftLedge = MAX(leftLedge, minLedge);
     if (_viewAppeared && II_FLOAT_EQUAL(self.slidingControllerView.frame.origin.x, self.referenceBounds.size.width - _leftLedge)) {
@@ -277,6 +279,8 @@ - (void)setLeftLedge:(CGFloat)leftLedge {
 }
 
 - (void)setRightLedge:(CGFloat)rightLedge {
+    // Compute the final ledge in two steps. This prevents a strange bug where
+    // nesting MAX(X, MIN(Y, Z)) with miniscule referenceBounds returns a bogus near-zero value.
     CGFloat minLedge = MIN(self.referenceBounds.size.width, rightLedge);
     rightLedge = MAX(rightLedge, minLedge);
     if (_viewAppeared && II_FLOAT_EQUAL(self.slidingControllerView.frame.origin.x, _rightLedge - self.referenceBounds.size.width)) {