fix: stabilize editor block dragging
This commit is contained in:
lucaronin
@@ -16,9 +16,18 @@ import {
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type SideMenuProps,
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} from '@blocknote/react'
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import { GripVertical, Plus } from 'lucide-react'
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import { useCallback, type ComponentType, type DragEvent, type ReactNode } from 'react'
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import {
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useCallback,
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useLayoutEffect,
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useRef,
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type ComponentType,
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type MouseEvent as ReactMouseEvent,
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type PointerEvent as ReactPointerEvent,
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type ReactNode,
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} from 'react'
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type TolariaBlockNoteEditor = BlockNoteEditor<BlockSchema, InlineContentSchema, StyleSchema>
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type TolariaBlock = NonNullable<ReturnType<TolariaBlockNoteEditor['getBlock']>>
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type SideMenuBlock = {
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content?: unknown
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id: string
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@@ -28,6 +37,49 @@ type TableHeaderContent = Record<string, unknown> & {
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headerCols?: unknown
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headerRows?: unknown
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}
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type DropPlacement = 'before' | 'after'
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type PointerReorderState = {
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affordances?: ReorderAffordances
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clearListeners: () => void
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draggedBlockId: string
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editorElement: HTMLElement
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hasMoved: boolean
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lastDropTarget?: DropTarget | null
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ownerDocument: Document
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pointerId: number
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startX: number
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startY: number
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}
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type ReorderAffordances = {
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draggedElement: HTMLElement
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dropIndicator: HTMLElement
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pointerOffsetX: number
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pointerOffsetY: number
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preview: HTMLElement
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previousDraggedOpacity: string
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}
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type DropTarget = {
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blockId: string
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element: HTMLElement
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placement: DropPlacement
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}
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type SideMenuAlignmentState = {
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attemptsRemaining: number
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frame: number | null
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hasObservedTargets: boolean
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}
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type SideMenuAlignmentContext = {
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blockId: string
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editorElement: HTMLElement
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observeTargets: () => void
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ownerWindow: Window
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retry: () => void
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state: SideMenuAlignmentState
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}
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const BLOCK_CONTAINER_SELECTOR = '[data-node-type="blockContainer"][data-id]'
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const POINTER_REORDER_THRESHOLD_PX = 4
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const SIDE_MENU_ALIGNMENT_ATTEMPTS = 8
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function liveSideMenuBlock(editor: TolariaBlockNoteEditor, block: SideMenuBlock | undefined) {
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if (!block) return undefined
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@@ -55,6 +107,396 @@ function tableHeaderContent(block: unknown): TableHeaderContent | undefined {
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return block.content
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}
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function hasChildBlock(block: TolariaBlock, blockId: string): boolean {
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for (const child of block.children) {
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if (child.id === blockId || hasChildBlock(child, blockId)) return true
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}
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return false
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}
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function clamp(value: number, min: number, max: number) {
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return Math.min(Math.max(value, min), max)
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}
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function editorBlockElement(editor: TolariaBlockNoteEditor): HTMLElement | null {
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const element = editor.domElement
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if (!(element instanceof HTMLElement)) return null
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return element.matches('.bn-editor')
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? element
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: element.querySelector('.bn-editor')
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}
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function blockElementFromPoint({
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editorElement,
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ownerDocument,
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x,
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y,
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}: {
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editorElement: HTMLElement
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ownerDocument: Document
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x: number
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y: number
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}): HTMLElement | null {
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if (typeof ownerDocument.elementsFromPoint !== 'function') return null
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const editorRect = editorElement.getBoundingClientRect()
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if (editorRect.width <= 0 || editorRect.height <= 0) return null
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const hitX = clamp(x, editorRect.left + 10, editorRect.right - 10)
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const hitY = clamp(y, editorRect.top + 1, editorRect.bottom - 1)
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for (const element of ownerDocument.elementsFromPoint(hitX, hitY)) {
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if (!editorElement.contains(element)) continue
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const blockElement = element.closest(BLOCK_CONTAINER_SELECTOR)
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if (blockElement instanceof HTMLElement && editorElement.contains(blockElement)) {
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return blockElement
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}
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}
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return null
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}
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function dropPlacementForPoint(blockElement: HTMLElement, y: number): DropPlacement {
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const rect = blockElement.getBoundingClientRect()
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return y < rect.top + rect.height / 2 ? 'before' : 'after'
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}
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function blockIdFromElement(blockElement: HTMLElement): string | null {
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return blockElement.dataset.id ?? null
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}
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function blockElementById(editorElement: HTMLElement, blockId: string): HTMLElement | null {
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for (const element of editorElement.querySelectorAll(BLOCK_CONTAINER_SELECTOR)) {
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if (element instanceof HTMLElement && element.dataset.id === blockId) return element
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}
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return null
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}
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function sideMenuElementForEditor(editorElement: HTMLElement): HTMLElement | null {
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const container = editorElement.closest('.editor__blocknote-container') ?? editorElement
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const sideMenu = container.querySelector('.bn-side-menu')
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return sideMenu instanceof HTMLElement ? sideMenu : null
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}
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function blockTextAnchorRect(blockElement: HTMLElement): DOMRect | null {
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const content = blockElement.querySelector('.bn-block-content')
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const inlineContent = content?.querySelector('.bn-inline-content') ?? content
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if (!(inlineContent instanceof HTMLElement)) return null
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const ownerDocument = inlineContent.ownerDocument
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const range = ownerDocument.createRange()
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range.selectNodeContents(inlineContent)
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const textRect = range.getBoundingClientRect()
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range.detach()
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if (textRect.height > 0) return textRect
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const fallbackRect = inlineContent.getBoundingClientRect()
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return fallbackRect.height > 0 ? fallbackRect : null
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}
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function alignSideMenuWithBlockText(editorElement: HTMLElement, blockId: string): boolean {
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const blockElement = blockElementById(editorElement, blockId)
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const sideMenu = sideMenuElementForEditor(editorElement)
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if (!blockElement || !sideMenu) return false
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const anchorRect = blockTextAnchorRect(blockElement)
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if (!anchorRect) return false
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sideMenu.style.removeProperty('translate')
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const sideMenuRect = sideMenu.getBoundingClientRect()
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if (sideMenuRect.height <= 0) return false
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const anchorCenter = anchorRect.top + anchorRect.height / 2
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const sideMenuCenter = sideMenuRect.top + sideMenuRect.height / 2
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sideMenu.style.setProperty('translate', `0 ${anchorCenter - sideMenuCenter}px`)
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return true
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}
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function createSideMenuAlignmentState(): SideMenuAlignmentState {
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return {
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attemptsRemaining: SIDE_MENU_ALIGNMENT_ATTEMPTS,
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frame: null,
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hasObservedTargets: false,
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}
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}
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function createSideMenuResizeObserver(onResize: () => void): ResizeObserver | null {
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return typeof ResizeObserver === 'undefined'
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? null
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: new ResizeObserver(onResize)
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}
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function observeSideMenuAlignmentTargets({
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blockId,
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editorElement,
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resizeObserver,
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state,
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}: {
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blockId: string
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editorElement: HTMLElement
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resizeObserver: ResizeObserver | null
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state: SideMenuAlignmentState
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}) {
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if (state.hasObservedTargets) return
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const blockElement = blockElementById(editorElement, blockId)
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const sideMenu = sideMenuElementForEditor(editorElement)
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if (!resizeObserver || !blockElement || !sideMenu) return
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resizeObserver.observe(blockElement)
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resizeObserver.observe(sideMenu)
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state.hasObservedTargets = true
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}
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function scheduleSideMenuTextAlignment(context: SideMenuAlignmentContext) {
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const { blockId, editorElement, observeTargets, ownerWindow, retry, state } = context
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if (state.frame !== null) return
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state.frame = ownerWindow.requestAnimationFrame(() => {
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state.frame = null
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const aligned = alignSideMenuWithBlockText(editorElement, blockId)
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observeTargets()
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if (!aligned && state.attemptsRemaining > 0) {
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state.attemptsRemaining -= 1
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retry()
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}
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})
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}
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function createSideMenuAlignmentCleanup({
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editorElement,
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ownerWindow,
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resizeObserver,
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scheduleAlignment,
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state,
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}: {
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editorElement: HTMLElement
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ownerWindow: Window
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resizeObserver: ResizeObserver | null
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scheduleAlignment: () => void
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state: SideMenuAlignmentState
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}) {
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return () => {
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if (state.frame !== null) ownerWindow.cancelAnimationFrame(state.frame)
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resizeObserver?.disconnect()
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ownerWindow.removeEventListener('resize', scheduleAlignment)
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sideMenuElementForEditor(editorElement)?.style.removeProperty('translate')
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}
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}
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function createSideMenuAlignmentController(editor: TolariaBlockNoteEditor, blockId: string) {
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const editorElement = editorBlockElement(editor)
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const ownerWindow = editorElement?.ownerDocument.defaultView
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if (!editorElement || !ownerWindow) return undefined
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const state = createSideMenuAlignmentState()
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let resizeObserver: ResizeObserver | null = null
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const observeTargets = () => observeSideMenuAlignmentTargets({
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blockId,
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editorElement,
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resizeObserver,
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state,
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})
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const scheduleAlignment = () => scheduleSideMenuTextAlignment({
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blockId,
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editorElement,
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observeTargets,
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ownerWindow,
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retry: scheduleAlignment,
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state,
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})
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resizeObserver = createSideMenuResizeObserver(scheduleAlignment)
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scheduleAlignment()
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observeTargets()
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ownerWindow.addEventListener('resize', scheduleAlignment)
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return createSideMenuAlignmentCleanup({
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editorElement,
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ownerWindow,
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resizeObserver,
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scheduleAlignment,
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state,
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})
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}
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function useSideMenuTextAlignment(editor: TolariaBlockNoteEditor, block: SideMenuBlock | undefined) {
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useLayoutEffect(() => {
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if (!block) return
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return createSideMenuAlignmentController(editor, block.id)
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}, [block?.id, editor])
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}
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function styleDragPreview(preview: HTMLElement, rect: DOMRect) {
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preview.setAttribute('data-testid', 'editor-block-drag-preview')
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preview.setAttribute('aria-hidden', 'true')
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preview.className = 'editor__blocknote-container'
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preview.style.position = 'fixed'
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preview.style.width = `${rect.width}px`
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preview.style.maxHeight = `${Math.max(rect.height, 1)}px`
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preview.style.overflow = 'hidden'
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preview.style.pointerEvents = 'none'
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preview.style.opacity = '0.72'
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preview.style.zIndex = '14000'
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preview.style.boxSizing = 'border-box'
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preview.style.borderRadius = '6px'
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preview.style.background = 'var(--bg-primary, white)'
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preview.style.boxShadow = '0 10px 26px rgba(15, 23, 42, 0.18)'
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}
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function createDragPreview(draggedElement: HTMLElement, ownerDocument: Document): HTMLElement {
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const preview = ownerDocument.createElement('div')
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const clone = draggedElement.cloneNode(true)
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const rect = draggedElement.getBoundingClientRect()
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if (clone instanceof HTMLElement) {
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clone.style.margin = '0'
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clone.style.width = '100%'
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clone.style.pointerEvents = 'none'
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preview.appendChild(clone)
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}
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styleDragPreview(preview, rect)
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ownerDocument.body.appendChild(preview)
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return preview
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}
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function createDropIndicator(ownerDocument: Document): HTMLElement {
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const indicator = ownerDocument.createElement('div')
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indicator.setAttribute('data-testid', 'editor-block-drop-indicator')
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indicator.style.position = 'fixed'
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indicator.style.height = '2px'
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indicator.style.pointerEvents = 'none'
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indicator.style.background = 'var(--border-focus, #155dff)'
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indicator.style.borderRadius = '999px'
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indicator.style.boxShadow = '0 0 0 1px rgba(21, 93, 255, 0.12), 0 0 10px rgba(21, 93, 255, 0.28)'
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indicator.style.zIndex = '14001'
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indicator.style.display = 'none'
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ownerDocument.body.appendChild(indicator)
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return indicator
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}
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function createReorderAffordances(state: PointerReorderState): ReorderAffordances | undefined {
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const draggedElement = blockElementById(state.editorElement, state.draggedBlockId)
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if (!draggedElement) return undefined
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const rect = draggedElement.getBoundingClientRect()
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const previousDraggedOpacity = draggedElement.style.opacity
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const preview = createDragPreview(draggedElement, state.ownerDocument)
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draggedElement.style.opacity = '0.35'
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return {
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draggedElement,
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dropIndicator: createDropIndicator(state.ownerDocument),
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pointerOffsetX: state.startX - rect.left,
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pointerOffsetY: state.startY - rect.top,
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preview,
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previousDraggedOpacity,
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}
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}
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function cleanupReorderAffordances(affordances: ReorderAffordances | undefined) {
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if (!affordances) return
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affordances.draggedElement.style.opacity = affordances.previousDraggedOpacity
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affordances.preview.remove()
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affordances.dropIndicator.remove()
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}
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function updateDragPreview(affordances: ReorderAffordances, x: number, y: number) {
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affordances.preview.style.left = `${x - affordances.pointerOffsetX}px`
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affordances.preview.style.top = `${y - affordances.pointerOffsetY}px`
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}
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function hideDropIndicator(affordances: ReorderAffordances | undefined) {
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if (affordances) affordances.dropIndicator.style.display = 'none'
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}
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function updateDropIndicator(affordances: ReorderAffordances | undefined, target: DropTarget | null) {
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if (!affordances || !target) {
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hideDropIndicator(affordances)
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return
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}
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const rect = target.element.getBoundingClientRect()
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affordances.dropIndicator.style.display = 'block'
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affordances.dropIndicator.style.left = `${rect.left}px`
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affordances.dropIndicator.style.top = `${target.placement === 'before' ? rect.top - 1 : rect.bottom - 1}px`
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affordances.dropIndicator.style.width = `${rect.width}px`
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}
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function validDropTarget({
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editor,
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state,
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x,
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y,
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}: {
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editor: TolariaBlockNoteEditor
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state: PointerReorderState
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x: number
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y: number
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}): DropTarget | null {
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const targetElement = blockElementFromPoint({
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editorElement: state.editorElement,
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ownerDocument: state.ownerDocument,
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x,
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y,
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})
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if (!targetElement) return null
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const blockId = blockIdFromElement(targetElement)
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if (!blockId || blockId === state.draggedBlockId) return null
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const draggedBlock = editor.getBlock(state.draggedBlockId)
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const targetBlock = editor.getBlock(blockId)
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if (!draggedBlock || !targetBlock || hasChildBlock(draggedBlock, blockId)) return null
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return {
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blockId,
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element: targetElement,
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placement: dropPlacementForPoint(targetElement, y),
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}
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}
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function moveBlockByPointerDrop({
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editor,
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draggedBlockId,
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targetBlockId,
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placement,
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}: {
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editor: TolariaBlockNoteEditor
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draggedBlockId: string
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targetBlockId: string
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placement: DropPlacement
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}): boolean {
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if (draggedBlockId === targetBlockId) return false
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const draggedBlock = editor.getBlock(draggedBlockId)
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const targetBlock = editor.getBlock(targetBlockId)
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if (!draggedBlock || !targetBlock || hasChildBlock(draggedBlock, targetBlockId)) return false
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let moved = false
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editor.focus()
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editor.transact(() => {
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const currentDraggedBlock = editor.getBlock(draggedBlockId)
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const currentTargetBlock = editor.getBlock(targetBlockId)
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if (!currentDraggedBlock || !currentTargetBlock) return
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if (hasChildBlock(currentDraggedBlock, targetBlockId)) return
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editor.removeBlocks([currentDraggedBlock.id])
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editor.insertBlocks([currentDraggedBlock], currentTargetBlock.id, placement)
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moved = true
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})
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return moved
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}
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function useSideMenuBlock() {
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const editor = useBlockNoteEditor<BlockSchema, InlineContentSchema, StyleSchema>()
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const block = useExtensionState(SideMenuExtension, {
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@@ -116,18 +558,123 @@ function TolariaDragHandleButton({
|
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const sideMenu = useExtension(SideMenuExtension)
|
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const { block, editor } = useSideMenuBlock()
|
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const MenuComponent: ComponentType<{ children?: ReactNode }> = dragHandleMenu ?? DragHandleMenu
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const reorderStateRef = useRef<PointerReorderState | null>(null)
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const suppressNextClickRef = useRef(false)
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const clearReorderState = useCallback(() => {
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const state = reorderStateRef.current
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if (state) {
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state.clearListeners()
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cleanupReorderAffordances(state.affordances)
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}
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reorderStateRef.current = null
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}, [])
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||||
const finishPointerReorder = useCallback((event: PointerEvent) => {
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const state = reorderStateRef.current
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if (!state || event.pointerId !== state.pointerId) return
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||||
|
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clearReorderState()
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if (!state.hasMoved) return
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||||
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event.preventDefault()
|
||||
suppressNextClickRef.current = true
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||||
const dropTarget = state.lastDropTarget ?? validDropTarget({
|
||||
editor,
|
||||
state,
|
||||
x: event.clientX,
|
||||
y: event.clientY,
|
||||
})
|
||||
if (!dropTarget) return
|
||||
|
||||
const moved = moveBlockByPointerDrop({
|
||||
editor,
|
||||
draggedBlockId: state.draggedBlockId,
|
||||
targetBlockId: dropTarget.blockId,
|
||||
placement: dropTarget.placement,
|
||||
})
|
||||
|
||||
if (!moved) suppressNextClickRef.current = false
|
||||
}, [clearReorderState, editor])
|
||||
|
||||
const onPointerDown = useCallback((event: ReactPointerEvent<HTMLElement>) => {
|
||||
if ((typeof event.button === 'number' && event.button !== 0) || event.isPrimary === false) return
|
||||
|
||||
const onDragStart = useCallback((event: DragEvent) => {
|
||||
runSideMenuAction(() => {
|
||||
const liveBlock = liveSideMenuBlock(editor, block)
|
||||
if (!liveBlock) {
|
||||
const editorElement = editorBlockElement(editor)
|
||||
if (!liveBlock || !editorElement) {
|
||||
event.preventDefault()
|
||||
return
|
||||
}
|
||||
|
||||
sideMenu.blockDragStart(event, liveBlock)
|
||||
clearReorderState()
|
||||
const ownerDocument = event.currentTarget.ownerDocument
|
||||
const pointerId = event.pointerId
|
||||
const handlePointerMove = (nativeEvent: PointerEvent) => {
|
||||
const state = reorderStateRef.current
|
||||
if (!state || nativeEvent.pointerId !== state.pointerId) return
|
||||
|
||||
const distance = Math.hypot(
|
||||
nativeEvent.clientX - state.startX,
|
||||
nativeEvent.clientY - state.startY,
|
||||
)
|
||||
if (!state.hasMoved && distance < POINTER_REORDER_THRESHOLD_PX) return
|
||||
|
||||
state.hasMoved = true
|
||||
suppressNextClickRef.current = true
|
||||
state.affordances ??= createReorderAffordances(state)
|
||||
if (!state.affordances) return
|
||||
|
||||
updateDragPreview(state.affordances, nativeEvent.clientX, nativeEvent.clientY)
|
||||
state.lastDropTarget = validDropTarget({
|
||||
editor,
|
||||
state,
|
||||
x: nativeEvent.clientX,
|
||||
y: nativeEvent.clientY,
|
||||
})
|
||||
updateDropIndicator(state.affordances, state.lastDropTarget ?? null)
|
||||
nativeEvent.preventDefault()
|
||||
}
|
||||
const handlePointerUp = (nativeEvent: PointerEvent) => finishPointerReorder(nativeEvent)
|
||||
const handlePointerCancel = (nativeEvent: PointerEvent) => {
|
||||
if (nativeEvent.pointerId !== pointerId) return
|
||||
clearReorderState()
|
||||
}
|
||||
|
||||
ownerDocument.addEventListener('pointermove', handlePointerMove, true)
|
||||
ownerDocument.addEventListener('pointerup', handlePointerUp, true)
|
||||
ownerDocument.addEventListener('pointercancel', handlePointerCancel, true)
|
||||
|
||||
reorderStateRef.current = {
|
||||
clearListeners: () => {
|
||||
ownerDocument.removeEventListener('pointermove', handlePointerMove, true)
|
||||
ownerDocument.removeEventListener('pointerup', handlePointerUp, true)
|
||||
ownerDocument.removeEventListener('pointercancel', handlePointerCancel, true)
|
||||
},
|
||||
draggedBlockId: liveBlock.id,
|
||||
editorElement,
|
||||
hasMoved: false,
|
||||
ownerDocument,
|
||||
pointerId,
|
||||
startX: event.clientX,
|
||||
startY: event.clientY,
|
||||
}
|
||||
try {
|
||||
event.currentTarget.setPointerCapture?.(pointerId)
|
||||
} catch {
|
||||
// Document-level pointer listeners still complete the reorder gesture.
|
||||
}
|
||||
})
|
||||
}, [block, editor, sideMenu])
|
||||
}, [block, clearReorderState, editor, finishPointerReorder])
|
||||
|
||||
const onClickCapture = useCallback((event: ReactMouseEvent<HTMLElement>) => {
|
||||
if (!suppressNextClickRef.current) return
|
||||
|
||||
suppressNextClickRef.current = false
|
||||
event.preventDefault()
|
||||
event.stopPropagation()
|
||||
}, [])
|
||||
|
||||
if (!block) return null
|
||||
|
||||
@@ -140,14 +687,20 @@ function TolariaDragHandleButton({
|
||||
position="left"
|
||||
>
|
||||
<Components.Generic.Menu.Trigger>
|
||||
<Components.SideMenu.Button
|
||||
label={dict.side_menu.drag_handle_label}
|
||||
draggable
|
||||
onDragStart={onDragStart}
|
||||
onDragEnd={sideMenu.blockDragEnd}
|
||||
className="bn-button"
|
||||
icon={<GripVertical size={20} data-test="dragHandle" />}
|
||||
/>
|
||||
<span
|
||||
className="tolaria-block-drag-handle"
|
||||
onPointerDown={onPointerDown}
|
||||
onClickCapture={onClickCapture}
|
||||
>
|
||||
<Components.SideMenu.Button
|
||||
label={dict.side_menu.drag_handle_label}
|
||||
draggable={false}
|
||||
onDragStart={(event) => event.preventDefault()}
|
||||
onDragEnd={sideMenu.blockDragEnd}
|
||||
className="bn-button"
|
||||
icon={<GripVertical size={20} data-test="dragHandle" />}
|
||||
/>
|
||||
</span>
|
||||
</Components.Generic.Menu.Trigger>
|
||||
<MenuComponent>{children}</MenuComponent>
|
||||
</Components.Generic.Menu.Root>
|
||||
@@ -231,10 +784,13 @@ function TolariaDragHandleMenu() {
|
||||
}
|
||||
|
||||
export function TolariaSideMenu(props: SideMenuProps) {
|
||||
const { block, editor } = useSideMenuBlock()
|
||||
useSideMenuTextAlignment(editor, block)
|
||||
|
||||
return (
|
||||
<SideMenu {...props}>
|
||||
<TolariaDragHandleButton dragHandleMenu={TolariaDragHandleMenu} />
|
||||
<TolariaAddBlockButton />
|
||||
<TolariaDragHandleButton dragHandleMenu={TolariaDragHandleMenu} />
|
||||
</SideMenu>
|
||||
)
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user