Lars
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- Incremented application version to 0.8.64 and updated changelog with new features. - Improved media handling in the Rich Text Editor with auto-scrolling during drag-and-drop. - Added new CSS styles for video thumbnails and enhanced layout for media items. - Removed deprecated `ExerciseAttachmentMediaStrip` from the ExerciseFullContent component. - Updated ExerciseFormPage to manage form dirty state and prevent data loss on navigation.
67 lines
2.1 KiB
JavaScript
67 lines
2.1 KiB
JavaScript
/**
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* Während eines Drags automatischen Bildlauf auslösen (Viewport + scrollbare Bereiche unter dem Cursor).
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* @param {DragEvent} e
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* @param {{ edgePx?: number, scrollStep?: number }} [opts]
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*/
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export function autoScrollForDragNearEdges(e, opts = {}) {
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const edge = opts.edgePx ?? 80
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const step = opts.scrollStep ?? Math.max(24, Math.round(window.innerHeight * 0.05))
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const { clientX, clientY } = e
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const vh = window.innerHeight || 0
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const vw = window.innerWidth || 0
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let sy =
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clientY < edge ? -step : vh > 0 && clientY > vh - edge ? step : 0
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let sx =
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clientX < edge ? -step : vw > 0 && clientX > vw - edge ? step : 0
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if (sy !== 0) window.scrollBy(0, sy)
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if (sx !== 0) window.scrollBy(sx, 0)
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/** @type {HTMLElement|null} */
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let top = /** @type {HTMLElement|null} */ (document.elementFromPoint(clientX, clientY))
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/** @type {Set<HTMLElement>} */
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const done = new Set()
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/** @type {HTMLElement|null} */
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let walk = top
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const innerEdge = Math.min(edge, 40)
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while (walk && walk !== document.body) {
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if (!(walk instanceof HTMLElement)) break
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const cs = window.getComputedStyle(walk)
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const canY =
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walk.scrollHeight - walk.clientHeight > 6 &&
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(cs.overflowY === 'auto' || cs.overflowY === 'scroll')
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const canX =
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walk.scrollWidth - walk.clientWidth > 6 &&
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(cs.overflowX === 'auto' || cs.overflowX === 'scroll')
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if ((canY || canX) && !done.has(walk)) {
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done.add(walk)
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const rect = walk.getBoundingClientRect()
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const relY = clientY - rect.top
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const relX = clientX - rect.left
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if (canY) {
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if (relY < innerEdge && walk.scrollTop > 0) walk.scrollTop -= step
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else if (rect.height - relY < innerEdge && walk.scrollTop < walk.scrollHeight - walk.clientHeight) {
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walk.scrollTop += step
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}
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}
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if (canX) {
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if (relX < innerEdge && walk.scrollLeft > 0) walk.scrollLeft -= step
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else if (rect.width - relX < innerEdge && walk.scrollLeft < walk.scrollWidth - walk.clientWidth) {
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walk.scrollLeft += step
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}
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}
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}
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walk = walk.parentElement
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}
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}
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