diff options
Diffstat (limited to 'lib/rect.coffee')
| -rw-r--r-- | lib/rect.coffee | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/lib/rect.coffee b/lib/rect.coffee index 67c9de7c..adc1fc36 100644 --- a/lib/rect.coffee +++ b/lib/rect.coffee @@ -9,8 +9,16 @@ Rect = width: x2 - x1 height: y2 - y1 + copy: (rect) -> + bottom: rect.bottom + top: rect.top + left: rect.left + right: rect.right + width: rect.width + height: rect.height + # Translate a rect by x horizontally and y vertically. - translate: (rect, x, y) -> + translate: (rect, x = 0, y = 0) -> bottom: rect.bottom + y top: rect.top + y left: rect.left + x @@ -19,18 +27,17 @@ Rect = height: rect.height # Subtract rect2 from rect1, returning an array of rects which are in rect1 but not rect2. - subtract: (rect1, rect2_) -> + subtract: (rect1, rect2) -> # Bound rect2 by rect1 - rect2 = {} rect2 = @create( - Math.max(rect1.left, rect2_.left), - Math.max(rect1.top, rect2_.top), - Math.min(rect1.right, rect2_.right), - Math.min(rect1.bottom, rect2_.bottom) + Math.max(rect1.left, rect2.left), + Math.max(rect1.top, rect2.top), + Math.min(rect1.right, rect2.right), + Math.min(rect1.bottom, rect2.bottom) ) # If bounding rect2 has made the width or height negative, rect1 does not contain rect2. - return [rect1] if rect2.width < 0 or rect2.height < 0 + return [Rect.copy rect1] if rect2.width < 0 or rect2.height < 0 # # All the possible rects, in the order @@ -60,5 +67,16 @@ Rect = rects.filter (rect) -> rect.height > 0 and rect.width > 0 + contains: (rect1, rect2) -> + rect1.right > rect2.left and + rect1.left < rect2.right and + rect1.bottom > rect2.top and + rect1.top < rect2.bottom + + equals: (rect1, rect2) -> + for property in ["top", "bottom", "left", "right", "width", "height"] + return false if rect1[property] != rect2[property] + true + root = exports ? window root.Rect = Rect |