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snap.go
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// Copyright 2022 Ahmet Alp Balkan
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import "github.com/gonutz/w32/v2"
// TODO find a way to round up divisions consistently, otherwise we end up with off by 1px
func toLeft(d w32.RECT, mul, div int32) w32.RECT {
return w32.RECT{
Left: d.Left,
Top: d.Top,
Right: d.Left + (d.Width()*mul)/div,
Bottom: d.Top + d.Height()}
}
func toRight(d w32.RECT, mul, div int32) w32.RECT {
return w32.RECT{
Left: d.Left + d.Width() - d.Width()*mul/div,
Top: d.Top,
Right: d.Left + d.Width(),
Bottom: d.Top + d.Height()}
}
func toTop(d w32.RECT, mul, div int32) w32.RECT {
return w32.RECT{
Left: d.Left,
Top: d.Top,
Right: d.Left + d.Width(),
Bottom: d.Top + d.Height()*mul/div}
}
func toBottom(d w32.RECT, mul, div int32) w32.RECT {
return w32.RECT{
Left: d.Left,
Top: d.Top + d.Height() - d.Height()*mul/div,
Right: d.Left + d.Width(),
Bottom: d.Top + d.Height()}
}
func leftHalf(disp, _ w32.RECT) w32.RECT { return toLeft(disp, 1, 2) }
func leftOneThirds(disp, _ w32.RECT) w32.RECT { return toLeft(disp, 1, 3) }
func leftTwoThirds(disp, _ w32.RECT) w32.RECT { return toLeft(disp, 2, 3) }
func topHalf(disp, _ w32.RECT) w32.RECT { return toTop(disp, 1, 2) }
func topOneThirds(disp, _ w32.RECT) w32.RECT { return toTop(disp, 1, 3) }
func topTwoThirds(disp, _ w32.RECT) w32.RECT { return toTop(disp, 2, 3) }
func rightHalf(disp, _ w32.RECT) w32.RECT { return toRight(disp, 1, 2) }
func rightOneThirds(disp, _ w32.RECT) w32.RECT { return toRight(disp, 1, 3) }
func rightTwoThirds(disp, _ w32.RECT) w32.RECT { return toRight(disp, 2, 3) }
func bottomHalf(disp, _ w32.RECT) w32.RECT { return toBottom(disp, 1, 2) }
func bottomOneThirds(disp, _ w32.RECT) w32.RECT { return toBottom(disp, 1, 3) }
func bottomTwoThirds(disp, _ w32.RECT) w32.RECT { return toBottom(disp, 2, 3) }
func topLeftHalf(disp, _ w32.RECT) w32.RECT { return merge(toLeft(disp, 1, 2), toTop(disp, 1, 2)) }
func topLeftTwoThirds(disp, _ w32.RECT) w32.RECT { return merge(toLeft(disp, 2, 3), toTop(disp, 1, 2)) }
func topLeftOneThirds(disp, _ w32.RECT) w32.RECT { return merge(toLeft(disp, 1, 3), toTop(disp, 1, 2)) }
func topRightHalf(disp, _ w32.RECT) w32.RECT { return merge(toRight(disp, 1, 2), toTop(disp, 1, 2)) }
func topRightTwoThirds(disp, _ w32.RECT) w32.RECT {
return merge(toRight(disp, 2, 3), toTop(disp, 1, 2))
}
func topRightOneThirds(disp, _ w32.RECT) w32.RECT {
return merge(toRight(disp, 1, 3), toTop(disp, 1, 2))
}
func bottomLeftHalf(disp, _ w32.RECT) w32.RECT {
return merge(toLeft(disp, 1, 2), toBottom(disp, 1, 2))
}
func bottomLeftTwoThirds(disp, _ w32.RECT) w32.RECT {
return merge(toLeft(disp, 2, 3), toBottom(disp, 1, 2))
}
func bottomLeftOneThirds(disp, _ w32.RECT) w32.RECT {
return merge(toLeft(disp, 1, 3), toBottom(disp, 1, 2))
}
func bottomRightHalf(disp, _ w32.RECT) w32.RECT {
return merge(toRight(disp, 1, 2), toBottom(disp, 1, 2))
}
func bottomRightTwoThirds(disp, _ w32.RECT) w32.RECT {
return merge(toRight(disp, 2, 3), toBottom(disp, 1, 2))
}
func bottomRightOneThirds(disp, _ w32.RECT) w32.RECT {
return merge(toRight(disp, 1, 3), toBottom(disp, 1, 2))
}
func merge(x, y w32.RECT) w32.RECT {
return w32.RECT{Left: x.Left, Right: x.Right, Top: y.Top, Bottom: y.Bottom}
}