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Tidy up logic for scrolling to components

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This commit is contained in:
Andrew Kingston 2022-03-21 13:54:46 +00:00
parent 7c39430d1c
commit 2def829ebf
1 changed files with 15 additions and 16 deletions
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31
packages/builder/src/components/design/NavigationPanel/FrontendNavigatePane.svelte
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@ -33,41 +33,40 @@
const sidebarWidth = 259
const navItemHeight = 32
const { scrollLeft, scrollTop, offsetHeight } = scrollRef
let scrollBounds = scrollRef.getBoundingClientRect()
let newScrollOffsets = {}
let newOffsets = {}
// Calculate left offset
const offsetX = bounds.left + bounds.width + scrollRef.scrollLeft + 20
const offsetX = bounds.left + bounds.width + scrollLeft + 20
if (offsetX > sidebarWidth) {
newScrollOffsets.left = offsetX - sidebarWidth
newOffsets.left = offsetX - sidebarWidth
} else {
newScrollOffsets.left = 0
newOffsets.left = 0
}
if (newScrollOffsets.left === scrollRef.scrollLeft) {
delete newScrollOffsets.left
if (newOffsets.left === scrollLeft) {
delete newOffsets.left
}
// Calculate top offset
const offsetY = bounds.top - scrollBounds?.top + scrollRef.scrollTop
const upperOffset = 2 * navItemHeight - 8
const lowerOffset = navItemHeight + 8
if (offsetY > scrollRef.scrollTop + scrollRef.offsetHeight - upperOffset) {
newScrollOffsets.top = offsetY - scrollRef.offsetHeight + upperOffset
} else if (offsetY < scrollRef.scrollTop + lowerOffset) {
newScrollOffsets.top = offsetY - lowerOffset
const offsetY = bounds.top - scrollBounds?.top + scrollTop
if (offsetY > scrollTop + offsetHeight - 2 * navItemHeight) {
newOffsets.top = offsetY - offsetHeight + 2 * navItemHeight
} else if (offsetY < scrollTop + navItemHeight) {
newOffsets.top = offsetY - navItemHeight
} else {
delete newScrollOffsets.top
delete newOffsets.top
}
// Skip if offset is unchanged
if (newScrollOffsets.left == null && newScrollOffsets.top == null) {
if (newOffsets.left == null && newOffsets.top == null) {
return
}
// Smoothly scroll to the offset
scrollRef.scroll({
...newScrollOffsets,
...newOffsets,
behavior: "smooth",
})
}