|
| 1 | +import { h } from '@stencil/core'; |
| 2 | +import state from './sidePanelSwiperStore'; |
| 3 | +import styles from './sidePanelSwiper.styles'; |
| 4 | + |
| 5 | +interface SidePanelSwiperPropsType { |
| 6 | + open: boolean; |
| 7 | + onSheetDismiss?: () => void; |
| 8 | + onSheetSnapChange?: (index: number, snapPoint: string) => void; |
| 9 | +} |
| 10 | + |
| 11 | +let hasInitialized = false; |
| 12 | +let previousOpen: boolean | null = null; |
| 13 | + |
| 14 | +const snapPointsArray: string[] = ['100%']; |
| 15 | +let sheetElement: HTMLElement | null = null; |
| 16 | + |
| 17 | +let dragState = { |
| 18 | + startY: 0, |
| 19 | + currentY: 0, |
| 20 | + startTransform: 100, |
| 21 | + isAnimating: false, |
| 22 | +}; |
| 23 | + |
| 24 | +let isDragging = false; |
| 25 | + |
| 26 | +export function SidePanelSwiper({ open = false, onSheetDismiss, onSheetSnapChange }: SidePanelSwiperPropsType, children: JSX.Element) { |
| 27 | + const handleSheetDismiss = () => { |
| 28 | + onSheetDismiss?.(); |
| 29 | + } |
| 30 | + |
| 31 | + const animateToPosition = (snapIndex: number, emitEvent: boolean = true) => { |
| 32 | + if (!sheetElement || dragState.isAnimating) { |
| 33 | + return; |
| 34 | + } |
| 35 | + |
| 36 | + const snapPercent = parseFloat(snapPointsArray[snapIndex] || '50'); |
| 37 | + const targetY = 100 - snapPercent; |
| 38 | + |
| 39 | + dragState.isAnimating = true; |
| 40 | + dragState.startTransform = targetY; |
| 41 | + |
| 42 | + sheetElement.style.transition = 'transform 350ms cubic-bezier(0.25, 0.46, 0.45, 0.94)'; |
| 43 | + sheetElement.style.transform = `translateY(${targetY}%)`; |
| 44 | + |
| 45 | + setTimeout(() => { |
| 46 | + dragState.isAnimating = false; |
| 47 | + if (emitEvent && state.isVisible) { |
| 48 | + onSheetSnapChange?.(snapIndex, snapPointsArray[snapIndex]); |
| 49 | + } |
| 50 | + if (sheetElement) { |
| 51 | + sheetElement.style.transition = ''; |
| 52 | + } |
| 53 | + }, 350); |
| 54 | + } |
| 55 | + |
| 56 | + const openToSnapPoint = (snapIndex: number = 1) => { |
| 57 | + if (dragState.isAnimating) { |
| 58 | + return; |
| 59 | + } |
| 60 | + |
| 61 | + state.currentSnapIndex = Math.max(0, Math.min(snapIndex, snapPointsArray.length - 1)); |
| 62 | + state.isVisible = true; |
| 63 | + |
| 64 | + setTimeout(() => { |
| 65 | + if (sheetElement && state.isVisible) { |
| 66 | + animateToPosition(state.currentSnapIndex, false); |
| 67 | + } |
| 68 | + }, 50); |
| 69 | + } |
| 70 | + |
| 71 | + const animateToClose = () => { |
| 72 | + if (!sheetElement || dragState.isAnimating) { |
| 73 | + return; |
| 74 | + } |
| 75 | + |
| 76 | + dragState.isAnimating = true; |
| 77 | + sheetElement.style.transition = 'transform 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94)'; |
| 78 | + sheetElement.style.transform = 'translateY(100%)'; |
| 79 | + |
| 80 | + setTimeout(() => { |
| 81 | + dragState.isAnimating = false; |
| 82 | + state.isVisible = false; |
| 83 | + handleSheetDismiss(); |
| 84 | + if (sheetElement) { |
| 85 | + sheetElement.style.transition = ''; |
| 86 | + } |
| 87 | + }, 300); |
| 88 | + } |
| 89 | + |
| 90 | + const closeSwiper = () => { |
| 91 | + if (dragState.isAnimating || !state.isVisible) { |
| 92 | + return; |
| 93 | + } |
| 94 | + |
| 95 | + animateToClose(); |
| 96 | + } |
| 97 | + |
| 98 | + if (previousOpen !== null && previousOpen !== open) { |
| 99 | + if (open && !state.isVisible) { |
| 100 | + openToSnapPoint(state.currentSnapIndex); |
| 101 | + } else if (!open && state.isVisible) { |
| 102 | + closeSwiper(); |
| 103 | + } |
| 104 | + } |
| 105 | + |
| 106 | + previousOpen = open; |
| 107 | + |
| 108 | + const setSheetRef = (el: HTMLElement | null) => { |
| 109 | + sheetElement = el; |
| 110 | + |
| 111 | + if (el && !hasInitialized) { |
| 112 | + hasInitialized = true; |
| 113 | + state.isVisible = open; |
| 114 | + |
| 115 | + if (window.innerWidth <= 480) { |
| 116 | + el.style.transform = 'translateY(100%)'; |
| 117 | + } |
| 118 | + |
| 119 | + if (open) { |
| 120 | + openToSnapPoint(state.currentSnapIndex); |
| 121 | + } |
| 122 | + } |
| 123 | + } |
| 124 | + |
| 125 | + |
| 126 | + const handleDragStart = (e: MouseEvent | TouchEvent) => { |
| 127 | + if (dragState.isAnimating) { |
| 128 | + return; |
| 129 | + } |
| 130 | + |
| 131 | + e.preventDefault(); |
| 132 | + e.stopPropagation(); |
| 133 | + |
| 134 | + isDragging = true; |
| 135 | + const clientY = 'touches' in e ? e.touches[0].clientY : e.clientY; |
| 136 | + dragState.startY = clientY; |
| 137 | + dragState.currentY = clientY; |
| 138 | + |
| 139 | + // Get current transform |
| 140 | + const transform = getCurrentTransform(); |
| 141 | + dragState.startTransform = transform; |
| 142 | + |
| 143 | + // Add global event listeners |
| 144 | + document.addEventListener('mousemove', handleDragMove, { |
| 145 | + passive: false, |
| 146 | + }); |
| 147 | + document.addEventListener('touchmove', handleDragMove, { |
| 148 | + passive: false, |
| 149 | + }); |
| 150 | + document.addEventListener('mouseup', handleDragEnd); |
| 151 | + document.addEventListener('touchend', handleDragEnd); |
| 152 | + }; |
| 153 | + |
| 154 | + const handleDragMove = (e: MouseEvent | TouchEvent) => { |
| 155 | + if (!isDragging || !sheetElement || dragState.isAnimating) { |
| 156 | + return; |
| 157 | + } |
| 158 | + |
| 159 | + e.preventDefault(); |
| 160 | + e.stopPropagation(); |
| 161 | + |
| 162 | + const clientY = 'touches' in e ? e.touches[0].clientY : e.clientY; |
| 163 | + dragState.currentY = clientY; |
| 164 | + |
| 165 | + const deltaY = dragState.currentY - dragState.startY; |
| 166 | + const viewportHeight = window.innerHeight; |
| 167 | + const deltaPercent = (deltaY / viewportHeight) * 100; |
| 168 | + |
| 169 | + const newTransform = Math.min(100, Math.max(0, dragState.startTransform + deltaPercent)); |
| 170 | + |
| 171 | + sheetElement.style.transform = `translateY(${newTransform}%)`; |
| 172 | + }; |
| 173 | + |
| 174 | + const handleDragEnd = () => { |
| 175 | + if (!isDragging || dragState.isAnimating) { |
| 176 | + return; |
| 177 | + } |
| 178 | + |
| 179 | + isDragging = false; |
| 180 | + |
| 181 | + // Remove global event listeners |
| 182 | + document.removeEventListener('mousemove', handleDragMove); |
| 183 | + document.removeEventListener('touchmove', handleDragMove); |
| 184 | + document.removeEventListener('mouseup', handleDragEnd); |
| 185 | + document.removeEventListener('touchend', handleDragEnd); |
| 186 | + |
| 187 | + const currentTransform = getCurrentTransform(); |
| 188 | + const velocity = dragState.currentY - dragState.startY; |
| 189 | + |
| 190 | + // Close if dragged down significantly or fast downward velocity |
| 191 | + if (currentTransform > 70 || velocity > 150) { |
| 192 | + closeSwiper(); |
| 193 | + return; |
| 194 | + } |
| 195 | + |
| 196 | + // Find closest snap point |
| 197 | + const snapPercentages = snapPointsArray.map(point => parseFloat(point)); |
| 198 | + let closestIndex = 0; |
| 199 | + let closestDistance = Math.abs(100 - currentTransform - snapPercentages[0]); |
| 200 | + |
| 201 | + for (let i = 1; i < snapPercentages.length; i++) { |
| 202 | + const distance = Math.abs(100 - currentTransform - snapPercentages[i]); |
| 203 | + if (distance < closestDistance) { |
| 204 | + closestDistance = distance; |
| 205 | + closestIndex = i; |
| 206 | + } |
| 207 | + } |
| 208 | + |
| 209 | + state.currentSnapIndex = closestIndex; |
| 210 | + animateToPosition(closestIndex, true); |
| 211 | + }; |
| 212 | + |
| 213 | + const getCurrentTransform = (): number => { |
| 214 | + if (!sheetElement) { |
| 215 | + return 100; |
| 216 | + } |
| 217 | + |
| 218 | + const transform = sheetElement.style.transform; |
| 219 | + if (transform && transform.includes('translateY')) { |
| 220 | + const match = transform.match(/translateY\(([^)]+)%?\)/); |
| 221 | + if (match) { |
| 222 | + return parseFloat(match[1].replace('%', '')); |
| 223 | + } |
| 224 | + } |
| 225 | + return 100; |
| 226 | + } |
| 227 | + return ( |
| 228 | + <div class={styles.sidePanelSwiperContainer}> |
| 229 | + <div class={{ [styles.sidePanelSwiperWrapper]: true, [styles.sidePanelSwiperWrapperVisible]: state.isVisible, [styles.sidePanelSwiperWrapperHidden]: !state.isVisible }}> |
| 230 | + <div |
| 231 | + class={styles.sidePanelSwiper} |
| 232 | + ref={setSheetRef} |
| 233 | + onClick={(event: MouseEvent) => event.stopPropagation()} |
| 234 | + > |
| 235 | + <div class={styles.sidePanelSwiperHandleWrapper}> |
| 236 | + <div |
| 237 | + class={styles.sidePanelSwiperHandleContainer} |
| 238 | + onMouseDown={handleDragStart} |
| 239 | + onTouchStart={handleDragStart} |
| 240 | + > |
| 241 | + <div class={styles.sidePanelSwiperHandle} /> |
| 242 | + </div> |
| 243 | + </div> |
| 244 | + |
| 245 | + <div class={styles.sidePanelSwiperContent}> |
| 246 | + {children} |
| 247 | + </div> |
| 248 | + </div> |
| 249 | + </div> |
| 250 | + </div> |
| 251 | + ); |
| 252 | +} |
| 253 | + |
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