diff options
| -rw-r--r-- | Operations.hs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Operations.hs b/Operations.hs index 450e123..d35c20d 100644 --- a/Operations.hs +++ b/Operations.hs @@ -482,3 +482,36 @@ mouseResizeWindow w = withDisplay $ \d -> do -- x <- f d w wa -- mouseDrag $ \(_,_,_,ex,ey,_,_,_,_,_) -> g x ex ey d w wa -- float w + + +------------------------------------------------------------------------ +-- size hints + +-- | Reduce the dimensions if needed to comply to the given SizeHints. +applySizeHints :: SizeHints -> (Dimension, Dimension) -> (Dimension, Dimension) +applySizeHints sh = + maybe id applyMaxSizeHint (sh_max_size sh) . + maybe id (\(bw, bh) (w, h) -> (w+bw, h+bh)) (sh_base_size sh) . + maybe id applyResizeIncHint (sh_resize_inc sh) . + maybe id applyAspectHint (sh_aspect sh) . + maybe id (\(bw, bh) (w, h) -> (w-bw, h-bh)) (sh_base_size sh) + +-- | Reduce the dimensions so their aspect ratio falls between the two given aspect ratios. +applyAspectHint :: ((Dimension, Dimension), (Dimension, Dimension)) -> (Dimension, Dimension) -> (Dimension, Dimension) +applyAspectHint ((minx, miny), (maxx, maxy)) (w, h) + | or [minx < 1, miny < 1, maxx < 1, maxy < 1] = (w, h) + | w * maxy > h * maxx = (h * maxx `div` maxy, h) + | w * miny < h * minx = (w, w * miny `div` minx) + | otherwise = (w, h) + +-- | Reduce the dimensions so they are a multiple of the size increments. +applyResizeIncHint :: (Dimension, Dimension) -> (Dimension, Dimension) -> (Dimension, Dimension) +applyResizeIncHint (iw, ih) (w, h) + | iw > 0 && ih > 0 = (w - w `mod` iw, h - h `mod` ih) + | otherwise = (w, h) + +-- | Reduce the dimensions if they exceed the given maximum dimensions. +applyMaxSizeHint :: (Dimension, Dimension) -> (Dimension, Dimension) -> (Dimension, Dimension) +applyMaxSizeHint (maxw, maxh) (w, h) + | maxw > 0 && maxh > 0 = (min w maxw, min h maxh) + | otherwise = (w, h) |