380 lines
17 KiB
JavaScript
380 lines
17 KiB
JavaScript
import React from 'react'
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const aspectRatios = {
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square: '1 / 1',
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portrait: '4 / 5',
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story: '9 / 16',
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landscape: '16 / 9',
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}
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const placementStyles = {
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'top-left': { top: '12%', left: '12%' },
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'top-right': { top: '12%', right: '12%' },
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'bottom-left': { bottom: '12%', left: '12%' },
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'bottom-right': { bottom: '12%', right: '12%' },
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}
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// ---------------------------------------------------------------------------
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// DraggableElement — wraps any canvas element with pointer-drag positioning.
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// Position is tracked locally during drag (avoids parent re-renders), then
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// committed to the parent via onMove(elementId, x%, y%) on pointer-up.
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// ---------------------------------------------------------------------------
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function DraggableElement({ elementId, canvasRef, freePos, savedWidth, onMove, style, className, children }) {
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const dragState = React.useRef(null)
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const [localPos, setLocalPos] = React.useState(null)
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const [localWidth, setLocalWidth] = React.useState(null)
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function handlePointerDown(event) {
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event.preventDefault()
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event.stopPropagation()
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const canvas = canvasRef.current
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if (!canvas) return
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const canvasRect = canvas.getBoundingClientRect()
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const elemRect = event.currentTarget.getBoundingClientRect()
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const offsetX = event.clientX - elemRect.left
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const offsetY = event.clientY - elemRect.top
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const startX = ((elemRect.left - canvasRect.left) / canvasRect.width) * 100
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const startY = ((elemRect.top - canvasRect.top) / canvasRect.height) * 100
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// Capture element width as % of canvas so it stays the same after going absolute.
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const widthPct = Math.round((elemRect.width / canvasRect.width) * 1000) / 10
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dragState.current = { canvasRect, offsetX, offsetY, widthPct }
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event.currentTarget.setPointerCapture(event.pointerId)
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setLocalPos({ x: startX, y: startY })
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setLocalWidth(widthPct)
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}
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function calcPos(event) {
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const { canvasRect, offsetX, offsetY } = dragState.current
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return {
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x: Math.max(0, Math.min(94, ((event.clientX - canvasRect.left - offsetX) / canvasRect.width) * 100)),
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y: Math.max(0, Math.min(92, ((event.clientY - canvasRect.top - offsetY) / canvasRect.height) * 100)),
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}
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}
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function handlePointerMove(event) {
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if (!dragState.current) return
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setLocalPos(calcPos(event))
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}
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function handlePointerUp(event) {
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if (!dragState.current) return
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const pos = calcPos(event)
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const widthPct = dragState.current.widthPct
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dragState.current = null
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setLocalPos(null)
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setLocalWidth(null)
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onMove?.(elementId, Math.round(pos.x * 10) / 10, Math.round(pos.y * 10) / 10, widthPct)
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}
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const isDragging = localPos !== null
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const absPos = localPos ?? freePos
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// Width to use when the element is absolutely positioned.
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const resolvedWidth = localWidth ?? savedWidth
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const posStyle = absPos
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? { position: 'absolute', left: `${absPos.x}%`, top: `${absPos.y}%`, zIndex: isDragging ? 50 : 10, width: resolvedWidth != null ? `${resolvedWidth}%` : undefined }
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: {}
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return (
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<div
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style={{ ...style, ...posStyle, cursor: isDragging ? 'grabbing' : 'grab', touchAction: 'none', userSelect: 'none' }}
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className={`${className} rounded ${isDragging ? 'ring-2 ring-sky-400/70 opacity-90' : 'ring-1 ring-transparent hover:ring-white/30'} transition-[box-shadow]`}
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onPointerDown={handlePointerDown}
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onPointerMove={handlePointerMove}
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onPointerUp={handlePointerUp}
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onPointerCancel={handlePointerUp}
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>
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{children}
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</div>
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)
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}
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function overlayStyle(style) {
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if (style === 'dark-strong') return 'linear-gradient(180deg, rgba(2,6,23,0.38), rgba(2,6,23,0.68))'
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if (style === 'light-soft') return 'linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.22))'
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if (style === 'dark-soft') return 'linear-gradient(180deg, rgba(2,6,23,0.18), rgba(2,6,23,0.48))'
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return 'none'
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}
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function positionStyle(position) {
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if (position === 'top') return { alignItems: 'flex-start', paddingTop: '10%' }
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if (position === 'upper-middle') return { alignItems: 'flex-start', paddingTop: '22%' }
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if (position === 'lower-middle') return { alignItems: 'flex-end', paddingBottom: '18%' }
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if (position === 'bottom') return { alignItems: 'flex-end', paddingBottom: '10%' }
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return { alignItems: 'center' }
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}
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function alignmentClass(alignment) {
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if (alignment === 'left') return 'justify-start items-start text-left'
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if (alignment === 'right') return 'justify-end items-end text-right'
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return 'justify-center items-center text-center'
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}
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function focalPositionStyle(position) {
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if (position === 'top') return 'center top'
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if (position === 'bottom') return 'center bottom'
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if (position === 'left') return 'left center'
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if (position === 'right') return 'right center'
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if (position === 'top-left') return 'left top'
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if (position === 'top-right') return 'right top'
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if (position === 'bottom-left') return 'left bottom'
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if (position === 'bottom-right') return 'right bottom'
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return 'center center'
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}
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function shadowValue(preset) {
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if (preset === 'none') return 'none'
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if (preset === 'strong') return '0 12px 36px rgba(2, 6, 23, 0.72)'
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return '0 8px 24px rgba(2, 6, 23, 0.5)'
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}
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function resolveTextBlocks(card, project) {
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const blocks = Array.isArray(project.text_blocks) ? project.text_blocks.filter((block) => block?.enabled !== false && String(block?.text || '').trim() !== '') : []
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if (blocks.length) return blocks
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const content = project.content || {}
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return [
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{ key: 'title', type: 'title', text: card?.title || content.title || 'Untitled card', enabled: true },
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{ key: 'quote', type: 'quote', text: card?.quote_text || content.quote_text || 'Your next quote starts here.', enabled: true },
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{ key: 'author', type: 'author', text: card?.quote_author || content.quote_author || '', enabled: Boolean(card?.quote_author || content.quote_author) },
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{ key: 'source', type: 'source', text: card?.quote_source || content.quote_source || '', enabled: Boolean(card?.quote_source || content.quote_source) },
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].filter((block) => String(block.text || '').trim() !== '')
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}
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function blockClass(type) {
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if (type === 'title') return 'text-[11px] font-semibold uppercase tracking-[0.28em] text-white/55'
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if (type === 'author') return 'font-medium uppercase tracking-[0.18em] text-white/80 sm:text-sm lg:text-base'
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if (type === 'source') return 'text-[11px] uppercase tracking-[0.18em] text-white/50 sm:text-xs'
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if (type === 'caption') return 'text-[10px] uppercase tracking-[0.2em] text-white/45'
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if (type === 'body') return 'text-sm leading-6 text-white/90 sm:text-base'
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return 'font-semibold tracking-[-0.03em] sm:text-[1.65rem] lg:text-[2.1rem]'
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}
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function blockStyle(type, typography, textColor, accentColor, fontFamily) {
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const quoteSize = Math.max(10, Math.min(typography.quote_size || 72, 120))
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const authorSize = Math.max(14, Math.min(typography.author_size || 28, 42))
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const letterSpacing = Math.max(-1, Math.min(typography.letter_spacing || 0, 10))
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const lineHeight = Math.max(0.9, Math.min(typography.line_height || 1.2, 1.8))
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const shadowPreset = typography.shadow_preset || 'soft'
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// text_opacity: 10–100 (stored as integer percent), default 100
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const opacity = typography.text_opacity != null ? Math.max(10, Math.min(100, Number(typography.text_opacity))) / 100 : 1
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// Convert canvas pixels (1080-normalised) to container-query width units so
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// the preview proportions always match the rendered image regardless of how
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// wide the preview panel is.
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const toCqw = (px) => `${(px / 1080 * 100).toFixed(2)}cqw`
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const sizeMap = {
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title: toCqw(Math.max(16, quoteSize * 0.48)),
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quote: toCqw(quoteSize),
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author: toCqw(authorSize),
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source: toCqw(Math.max(12, authorSize * 0.82)),
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body: toCqw(Math.max(16, quoteSize * 0.54)),
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caption: toCqw(Math.max(12, authorSize * 0.74)),
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}
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const fontSize = sizeMap[type] ?? sizeMap.quote
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const font = fontFamily ? { fontFamily } : {}
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if (type === 'title') {
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return { ...font, opacity, color: accentColor, fontSize, letterSpacing: `${Math.max(letterSpacing, 0) / 10}em`, textShadow: shadowValue(shadowPreset) }
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}
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if (type === 'author' || type === 'source') {
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return { ...font, opacity, color: accentColor, fontSize, textShadow: shadowValue(shadowPreset) }
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}
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if (type === 'body' || type === 'caption') {
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return { ...font, opacity, color: textColor, fontSize, lineHeight, textShadow: shadowValue(shadowPreset) }
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}
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return { ...font, opacity, color: textColor, fontSize, lineHeight, letterSpacing: `${letterSpacing / 12}px`, textShadow: shadowValue(shadowPreset) }
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}
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export default function NovaCardCanvasPreview({ card, fonts = [], className = '', editable = false, onElementMove = null, renderMode = false }) {
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const canvasRef = React.useRef(null)
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const project = card?.project_json || {}
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const layout = project.layout || {}
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const typography = project.typography || {}
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const resolvedFont = fonts.find((f) => f.key === (typography.font_preset || 'modern-sans'))
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const fontFamily = resolvedFont?.family || null
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const background = project.background || {}
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const backgroundImage = card?.background_image?.processed_url
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const colors = Array.isArray(background.gradient_colors) && background.gradient_colors.length >= 2
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? background.gradient_colors
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: ['#0f172a', '#1d4ed8']
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const backgroundStyle = background.type === 'upload' && backgroundImage
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? `url(${backgroundImage}) ${focalPositionStyle(background.focal_position)}/cover no-repeat`
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: background.type === 'solid'
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? background.solid_color || '#111827'
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: `linear-gradient(180deg, ${colors[0]}, ${colors[1]})`
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const allTextBlocks = resolveTextBlocks(card, project)
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// Blocks with a saved free position are rendered absolutely; others stay in normal flow.
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const flowTextBlocks = allTextBlocks.filter((b) => b.pos_x == null || b.pos_y == null)
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const freeTextBlocks = allTextBlocks.filter((b) => b.pos_x != null && b.pos_y != null)
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const decorations = Array.isArray(project.decorations) ? project.decorations : []
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const assetItems = Array.isArray(project.assets?.items) ? project.assets.items : []
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const textColor = typography.text_color || '#ffffff'
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const accentColor = typography.accent_color || textColor
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const layoutMaxWidth = layout.max_width === 'compact' ? '62%' : layout.max_width === 'wide' ? '88%' : '76%'
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const maxWidth = typography.quote_width != null ? `${typography.quote_width}%` : layoutMaxWidth
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const padding = layout.padding === 'tight' ? '8%' : layout.padding === 'airy' ? '14%' : '11%'
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return (
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<div ref={canvasRef} data-card-canvas className={`relative overflow-hidden bg-slate-950 [container-type:inline-size] ${renderMode ? '' : 'rounded-[28px] border border-white/10 shadow-[0_30px_80px_rgba(2,6,23,0.35)]'} ${className}`} style={{ aspectRatio: aspectRatios[card?.format || 'square'] || aspectRatios.square }}>
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<div className="absolute inset-0" style={{ background: backgroundStyle, filter: background.type === 'upload' && Number(background.blur_level || 0) > 0 ? `blur(${Math.max(Number(background.blur_level) / 8, 0)}px)` : undefined }} />
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<div className="absolute inset-0" style={{ background: overlayStyle(background.overlay_style), opacity: Math.max(0, Math.min(Number(background.opacity || 50), 100)) / 100 }} />
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{!renderMode && (
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<div className="absolute left-4 top-4 rounded-full border border-white/10 bg-black/25 px-3 py-1 text-[10px] font-semibold uppercase tracking-[0.18em] text-white/80 backdrop-blur">
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{(card?.format || 'square').replace('-', ' ')}
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</div>
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)}
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{/* Asset items (non-draggable) */}
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{assetItems.slice(0, 6).map((item, index) => {
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if (item?.type === 'frame') {
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const top = index % 2 === 0 ? '10%' : '88%'
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return <div key={`${item.asset_key || item.label || 'frame'}-${index}`} className="absolute left-[12%] right-[12%] h-px bg-white/35" style={{ top }} />
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}
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return (
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<div
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key={`${item.asset_key || item.label || 'asset'}-${index}`}
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className="absolute text-white/85 drop-shadow-[0_6px_14px_rgba(2,6,23,0.3)]"
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style={{
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top: `${12 + ((index % 3) * 18)}%`,
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left: `${10 + (Math.floor(index / 3) * 72)}%`,
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color: accentColor,
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fontSize: `${(Math.max(18, Math.min(item.size || 26, 56)) / 1080 * 100).toFixed(2)}cqw`,
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}}
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>
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{item.glyph || item.label || '✦'}
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</div>
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)
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})}
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{/* Flow-positioned text blocks */}
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<div className={`relative flex h-full w-full ${alignmentClass(layout.alignment)}`} style={{ padding, ...positionStyle(layout.position) }}>
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<div className="flex w-full flex-col gap-4" style={{ maxWidth }}>
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{flowTextBlocks.map((block, index) => {
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const type = block?.type || 'body'
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const text = type === 'author' ? `— ${block.text}` : block.text
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const defStyle = blockStyle(type, typography, textColor, accentColor, fontFamily)
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const blockCls = blockClass(type)
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const blockKey = `${block.key || type}-${index}`
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if (editable) {
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return (
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<DraggableElement
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key={blockKey}
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elementId={`block:${block.key || type}`}
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canvasRef={canvasRef}
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freePos={null}
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onMove={onElementMove}
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style={defStyle}
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className={blockCls}
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>
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{text}
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</DraggableElement>
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)
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}
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return (
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<div key={blockKey} style={defStyle} className={blockCls}>
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{text}
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</div>
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)
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})}
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</div>
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</div>
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{/* Absolutely-positioned text blocks (dragged out of flow) */}
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{freeTextBlocks.map((block, index) => {
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const type = block?.type || 'body'
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const text = type === 'author' ? `— ${block.text}` : block.text
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const defStyle = blockStyle(type, typography, textColor, accentColor, fontFamily)
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const blockCls = blockClass(type)
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const blockKey = `free-${block.key || type}-${index}`
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if (editable) {
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return (
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<DraggableElement
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key={blockKey}
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elementId={`block:${block.key || type}`}
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canvasRef={canvasRef}
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freePos={{ x: block.pos_x, y: block.pos_y }}
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savedWidth={block.pos_width ?? null}
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onMove={onElementMove}
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style={defStyle}
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className={blockCls}
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>
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{text}
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</DraggableElement>
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)
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}
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return (
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<div
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key={blockKey}
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style={{ ...defStyle, position: 'absolute', left: `${block.pos_x}%`, top: `${block.pos_y}%`, ...(block.pos_width != null ? { width: `${block.pos_width}%` } : {}) }}
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className={blockCls}
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>
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{text}
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</div>
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)
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})}
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{/* Decorations — rendered last so they sit on top of all text content */}
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{decorations.slice(0, 6).map((decoration, index) => {
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const hasFreePos = decoration.pos_x != null && decoration.pos_y != null
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const placementPos = placementStyles[decoration.placement] || placementStyles['top-right']
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const decOpacity = decoration.opacity != null ? Math.max(10, Math.min(100, Number(decoration.opacity))) / 100 : 0.85
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const decStyle = {
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color: accentColor,
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fontSize: `${(Math.max(18, Math.min(decoration.size || 28, 64)) / 1080 * 100).toFixed(2)}cqw`,
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opacity: decOpacity,
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zIndex: 20,
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}
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const decKey = `${decoration.key || decoration.glyph || 'dec'}-${index}`
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const decContent = decoration.glyph || '✦'
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if (editable) {
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const freePos = hasFreePos ? { x: decoration.pos_x, y: decoration.pos_y } : null
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const absStyle = hasFreePos
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? { position: 'absolute', left: `${decoration.pos_x}%`, top: `${decoration.pos_y}%` }
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: { position: 'absolute', ...placementPos }
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return (
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<DraggableElement
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key={decKey}
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elementId={`decoration:${index}`}
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canvasRef={canvasRef}
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freePos={freePos}
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savedWidth={null}
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onMove={onElementMove}
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style={{ ...absStyle, ...decStyle }}
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className="drop-shadow-[0_6px_14px_rgba(2,6,23,0.3)]"
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>
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{decContent}
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</DraggableElement>
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)
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}
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return (
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<div
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key={decKey}
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className="absolute drop-shadow-[0_6px_14px_rgba(2,6,23,0.3)]"
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style={{ ...placementPos, ...decStyle }}
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>
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{decContent}
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</div>
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)
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})}
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</div>
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)
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}
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