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pkg/gocui/scrollbar.go
28 строк
1 KB
Stefan Haller
Copy gocui files into lazygit repo under pkg/gocui
30 апр 2026, 15:29
30 апр 2026, 15:29
196e0a3
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package gocui import "math" // returns start and height of scrollbar // `max` is the maximum possible value of `position` func calcScrollbar(listSize int, pageSize int, position int, scrollAreaSize int) (int, int) { height := calcScrollbarHeight(listSize, pageSize, scrollAreaSize) // assume we can't scroll past the last item maxPosition := listSize - pageSize if maxPosition <= 0 { return 0, height } if position == maxPosition { return scrollAreaSize - height, height } // we only want to show the scrollbar at the top or bottom positions if we're at the end. Hence the .Ceil (for moving the scrollbar once we scroll down) and the -1 (for pretending there's a smaller range than we actually have, with the above condition ensuring we snap to the bottom once we're at the end of the list) start := int(math.Ceil(((float64(position) / float64(maxPosition)) * float64(scrollAreaSize-height-1)))) return start, height } func calcScrollbarHeight(listSize int, pageSize int, scrollAreaSize int) int { if pageSize >= listSize { return scrollAreaSize } return int((float64(pageSize) / float64(listSize)) * float64(scrollAreaSize)) }