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import { useState, useEffect, useRef, useCallback } from '@wordpress/element'; |
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import { __ } from '@wordpress/i18n'; |
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import apiFetch from '@wordpress/api-fetch'; |
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import { useSortable, SortableContext } from '@dnd-kit/sortable'; |
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import { useDroppable } from '@dnd-kit/core'; |
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import { CSS } from '@dnd-kit/utilities'; |
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|
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// ── SVG icons (match ElementCard toolbar exactly) ───────────────────────────── |
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|
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const IconDrag = () => ( |
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<svg width="14" height="14" viewBox="0 0 16 16" fill="none"> |
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<path d="M6 3a1 1 0 1 1-2 0 1 1 0 0 1 2 0zm4 0a1 1 0 1 1-2 0 1 1 0 0 1 2 0zm-4 5a1 1 0 1 1-2 0 1 1 0 0 1 2 0zm4 0a1 1 0 1 1-2 0 1 1 0 0 1 2 0zm-4 5a1 1 0 1 1-2 0 1 1 0 0 1 2 0zm4 0a1 1 0 1 1-2 0 1 1 0 0 1 2 0z" fill="currentColor"/> |
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</svg> |
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); |
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|
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const IconEdit = () => ( |
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<svg width="14" height="14" viewBox="0 0 16 16" fill="none"> |
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<path d="M11.5 2.5l2 2-7 7H4.5v-2l7-7z" stroke="currentColor" strokeWidth="1.3" strokeLinecap="round" strokeLinejoin="round"/> |
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</svg> |
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); |
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|
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const IconDelete = () => ( |
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<svg width="14" height="14" viewBox="0 0 16 16" fill="none"> |
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<path d="M2 4h12M5.333 4V2.667C5.333 2.313 5.473 1.974 5.724 1.724 5.974 1.473 6.313 1.333 6.667 1.333H9.333C9.687 1.333 10.026 1.473 10.276 1.724 10.527 1.974 10.667 2.313 10.667 2.667V4M12.667 4 12 13.333C12 13.687 11.86 14.026 11.609 14.276 11.359 14.527 11.02 14.667 10.667 14.667H5.333C4.98 14.667 4.641 14.527 4.391 14.276 4.14 14.026 4 13.687 4 13.333L3.333 4" stroke="currentColor" strokeWidth="1.3" strokeLinecap="round" strokeLinejoin="round"/> |
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</svg> |
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); |
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|
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const IconMoveUp = () => ( |
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<svg width="14" height="14" viewBox="0 0 16 16" fill="none"> |
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<path d="M8 12V4M4 8l4-4 4 4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round"/> |
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</svg> |
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); |
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|
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const IconMoveDown = () => ( |
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<svg width="14" height="14" viewBox="0 0 16 16" fill="none"> |
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<path d="M8 4v8m4-4-4 4-4-4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round"/> |
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</svg> |
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); |
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|
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// ── ElementHotspot — draggable transparent overlay over one rendered element ── |
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|
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function ElementHotspot( { |
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element, |
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columnId, |
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index, |
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totalElements, |
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rect, |
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isSelected, |
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isDropTarget, |
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dispatch, |
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} ) { |
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const { |
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attributes, |
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listeners, |
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setNodeRef, |
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transform, |
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transition, |
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isDragging, |
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} = useSortable( { |
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id: element.id, |
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data: { source: 'canvas', columnId, element }, |
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} ); |
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|
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if ( ! rect ) return null; |
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|
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const style = { |
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position: 'absolute', |
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top: rect.top, |
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left: rect.left, |
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width: rect.width, |
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height: rect.height, |
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// Only apply dnd-kit transform to the actively dragged hotspot. |
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transform: isDragging ? CSS.Transform.toString( transform ) : undefined, |
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transition: isDragging ? transition : undefined, |
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zIndex: isDragging ? 50 : 2, |
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}; |
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|
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const isFirst = index === 0; |
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const isLast = index === totalElements - 1; |
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|
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return ( |
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<div |
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ref={ setNodeRef } |
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style={ style } |
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className={ [ |
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'bp-lc-hotspot', |
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isSelected ? 'is-selected' : '', |
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isDragging ? 'is-dragging' : '', |
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isDropTarget ? 'is-drop-target' : '', |
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].filter( Boolean ).join( ' ' ) } |
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onClick={ ( e ) => { |
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e.stopPropagation(); |
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dispatch( { type: 'SELECT_ELEMENT', elementId: element.id, columnId } ); |
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} } |
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{ ...attributes } |
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> |
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{/* Floating toolbar — appears on hover / when selected */} |
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<div className="bp-lc-hotspot__toolbar"> |
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<button |
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type="button" |
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className="bp-lc-hotspot__toolbar-btn bp-lc-hotspot__toolbar-btn--drag" |
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title={ __( 'Drag to reorder', 'better-payment' ) } |
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onClick={ ( e ) => e.stopPropagation() } |
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{ ...listeners } |
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> |
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<IconDrag /> |
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</button> |
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|
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{ ! isFirst && ( |
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<button |
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type="button" |
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className="bp-lc-hotspot__toolbar-btn" |
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title={ __( 'Move up', 'better-payment' ) } |
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onClick={ ( e ) => { |
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e.stopPropagation(); |
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dispatch( { type: 'REORDER_ELEMENTS', columnId, oldIndex: index, newIndex: index - 1 } ); |
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} } |
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> |
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<IconMoveUp /> |
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</button> |
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) } |
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|
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{ ! isLast && ( |
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<button |
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type="button" |
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className="bp-lc-hotspot__toolbar-btn" |
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title={ __( 'Move down', 'better-payment' ) } |
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onClick={ ( e ) => { |
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e.stopPropagation(); |
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dispatch( { type: 'REORDER_ELEMENTS', columnId, oldIndex: index, newIndex: index + 1 } ); |
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} } |
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> |
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<IconMoveDown /> |
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</button> |
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) } |
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|
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<button |
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type="button" |
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className="bp-lc-hotspot__toolbar-btn" |
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title={ __( 'Edit element', 'better-payment' ) } |
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onClick={ ( e ) => { |
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e.stopPropagation(); |
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dispatch( { type: 'SELECT_ELEMENT', elementId: element.id, columnId } ); |
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} } |
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> |
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<IconEdit /> |
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</button> |
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|
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<button |
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type="button" |
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className="bp-lc-hotspot__toolbar-btn bp-lc-hotspot__toolbar-btn--delete" |
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title={ __( 'Delete', 'better-payment' ) } |
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onClick={ ( e ) => { |
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e.stopPropagation(); |
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dispatch( { type: 'REMOVE_ELEMENT', columnId, elementId: element.id } ); |
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} } |
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> |
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<IconDelete /> |
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</button> |
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</div> |
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</div> |
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); |
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} |
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|
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// ── ColumnDropZone — droppable zone matching the rendered column ────────────── |
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|
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function ColumnDropZone( { column, rect } ) { |
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const isEmpty = column.elements.length === 0; |
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|
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const { setNodeRef, isOver } = useDroppable( { |
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id: `col-${ column.id }`, |
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data: { columnId: column.id }, |
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} ); |
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|
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if ( ! rect ) return null; |
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|
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return ( |
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<div |
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ref={ setNodeRef } |
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style={ { |
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position: 'absolute', |
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top: rect.top, |
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left: rect.left, |
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width: rect.width, |
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height: rect.height, |
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zIndex: 1, |
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pointerEvents: 'none', |
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} } |
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className={ [ |
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'bp-lc-col-zone', |
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isOver ? 'is-over' : '', |
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isEmpty ? 'is-empty' : '', |
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].filter( Boolean ).join( ' ' ) } |
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> |
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{ isEmpty && ( |
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<div className="bp-lc-col-zone__hint"> |
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<svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round"> |
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<path d="M12 5v14M5 12h14"/> |
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</svg> |
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<span>{ __( 'Drop elements here', 'better-payment' ) }</span> |
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</div> |
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) } |
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</div> |
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); |
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} |
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|
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// ── LiveCanvas ──────────────────────────────────────────────────────────────── |
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|
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export default function LiveCanvas( { |
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state, |
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campaignId, |
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selectedElementId, |
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dispatch, |
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dropTargetElementId, |
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} ) { |
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const [ previewHtml, setPreviewHtml ] = useState( '' ); |
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const [ loading, setLoading ] = useState( false ); |
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const [ iframeHeight, setIframeHeight ] = useState( 300 ); |
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const [ elementRects, setElementRects ] = useState( {} ); |
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const [ columnRects, setColumnRects ] = useState( {} ); |
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|
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const iframeRef = useRef( null ); |
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const debounceRef = useRef( null ); |
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const requestIdRef = useRef( 0 ); |
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const isFirstRender = useRef( true ); |
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const previewHtmlRef = useRef( '' ); |
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|
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const columns = state.layout?.columns || []; |
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|
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// Clear stale hotspot rects the moment layout changes so misplaced hotspots |
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// don't linger while the new iframe preview is loading. |
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useEffect( () => { |
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if ( isFirstRender.current ) return; |
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setElementRects( {} ); |
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setColumnRects( {} ); |
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}, [ state.layout ] ); // eslint-disable-line react-hooks/exhaustive-deps |
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|
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// ── Fetch preview HTML (debounced 200ms, immediate on first render) ─────── |
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useEffect( () => { |
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const delay = isFirstRender.current ? 0 : 200; |
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isFirstRender.current = false; |
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|
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clearTimeout( debounceRef.current ); |
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debounceRef.current = setTimeout( () => { |
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const requestId = ++requestIdRef.current; |
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setLoading( true ); |
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|
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apiFetch( { |
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path: 'better-payment/v1/campaigns/preview', |
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method: 'POST', |
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data: { |
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campaign_id: campaignId || 0, |
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layout: state.layout, |
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meta: state.meta, |
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}, |
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} ) |
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.then( ( data ) => { |
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if ( requestId !== requestIdRef.current ) return; |
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const newHtml = data.html || ''; |
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const unchanged = newHtml === previewHtmlRef.current; |
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previewHtmlRef.current = newHtml; |
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setPreviewHtml( newHtml ); |
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setLoading( false ); |
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if ( unchanged ) { |
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// React won't update srcDoc (same string) → iframe won't |
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// reload → onLoad won't fire → measure manually so hotspots |
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// are restored after the rect-clearing effect ran. |
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requestAnimationFrame( measurePositions ); |
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} |
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} ) |
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.catch( () => { |
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if ( requestId !== requestIdRef.current ) return; |
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setLoading( false ); |
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} ); |
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}, delay ); |
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|
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return () => clearTimeout( debounceRef.current ); |
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}, [ state.layout, state.meta, campaignId ] ); // eslint-disable-line react-hooks/exhaustive-deps |
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|
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// ── Measure element/column positions after iframe loads ─────────────────── |
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const measurePositions = useCallback( () => { |
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const iframe = iframeRef.current; |
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if ( ! iframe || ! iframe.contentDocument ) return; |
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|
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const doc = iframe.contentDocument; |
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|
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// Auto-height: expand iframe to its full content height so there is no |
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// internal scroll. This keeps the iframe viewport origin fixed at (0,0) |
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// relative to the iframe document — a prerequisite for the rect math below. |
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const contentHeight = Math.max( |
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doc.documentElement.scrollHeight, |
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doc.body ? doc.body.scrollHeight : 0 |
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); |
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setIframeHeight( contentHeight ); |
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|
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// getBoundingClientRect() called from inside the iframe returns coords in |
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// the iframe's own viewport space (origin = iframe top-left = 0,0). |
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// The overlay is position:absolute starting at the same (0,0) corner of |
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// .bp-lc-inner, so we use r.top / r.left directly — no parent-window |
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// offset needed. |
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// |
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// PADDING: expand each hotspot 4px beyond the element boundary so the |
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// hover border has breathing room and doesn't sit flush on the content. |
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const PAD = 4; |
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|
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const elRects = {}; |
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doc.querySelectorAll( '[data-bp-element-id]' ).forEach( ( el ) => { |
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const r = el.getBoundingClientRect(); |
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elRects[ el.dataset.bpElementId ] = { |
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top: r.top - PAD, |
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left: r.left - PAD, |
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width: r.width + PAD * 2, |
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height: r.height + PAD * 2, |
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}; |
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} ); |
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setElementRects( elRects ); |
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|
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const colRects = {}; |
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doc.querySelectorAll( '[data-bp-column-id]' ).forEach( ( el ) => { |
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const r = el.getBoundingClientRect(); |
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colRects[ el.dataset.bpColumnId ] = { |
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top: r.top, |
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left: r.left, |
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width: r.width, |
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height: r.height, |
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}; |
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} ); |
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setColumnRects( colRects ); |
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}, [] ); |
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|
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// Re-measure on window resize. |
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useEffect( () => { |
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window.addEventListener( 'resize', measurePositions ); |
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return () => window.removeEventListener( 'resize', measurePositions ); |
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}, [ measurePositions ] ); |
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|
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// ── Empty state ─────────────────────────────────────────────────────────── |
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if ( columns.length === 0 ) { |
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return ( |
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<div className="bp-cb-canvas bp-cb-canvas--empty"> |
| 341 |
<div className="bp-cb-canvas-placeholder"> |
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<button |
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className="bp-cb-canvas-placeholder__add" |
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title={ __( 'Choose a template to start', 'better-payment' ) } |
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onClick={ () => dispatch( { type: 'OPEN_TEMPLATE_MODAL' } ) } |
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> |
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<svg width="32" height="32" viewBox="0 0 32 32" fill="none"> |
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<circle cx="16" cy="16" r="15" stroke="#bbb" strokeWidth="1.5"/> |
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<path d="M16 10v12M10 16h12" stroke="#bbb" strokeWidth="2" strokeLinecap="round"/> |
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</svg> |
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</button> |
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<p>{ __( 'Drag elements from the right panel, or choose a template.', 'better-payment' ) }</p> |
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</div> |
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</div> |
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); |
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} |
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|
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// ── Render ──────────────────────────────────────────────────────────────── |
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return ( |
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<div |
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className="bp-lc-wrap" |
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onClick={ () => dispatch( { type: 'DESELECT_ELEMENT' } ) } |
| 363 |
> |
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{/* Shade — direct child of bp-lc-wrap so position:absolute;inset:0 covers |
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the full canvas area (flex slot), not just the iframe content height */} |
| 366 |
{ loading && <div className="bp-lc-shade" /> } |
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|
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{/* Outer shell — iframe + overlay share the same coordinate space */} |
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<div className="bp-lc-inner" style={ { height: iframeHeight || 'auto' } }> |
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|
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{/* Live preview iframe — pointer-events disabled so overlay intercepts all input */} |
| 372 |
<iframe |
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ref={ iframeRef } |
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srcDoc={ previewHtml } |
| 375 |
className="bp-lc-iframe" |
| 376 |
style={ { height: iframeHeight } } |
| 377 |
onLoad={ measurePositions } |
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title={ __( 'Campaign Preview', 'better-payment' ) } |
| 379 |
sandbox="allow-same-origin allow-scripts" |
| 380 |
/> |
| 381 |
|
| 382 |
{/* Transparent interaction overlay */} |
| 383 |
<div |
| 384 |
className="bp-lc-overlay" |
| 385 |
style={ { height: iframeHeight } } |
| 386 |
> |
| 387 |
{ columns.map( ( column ) => ( |
| 388 |
<SortableContext |
| 389 |
key={ column.id } |
| 390 |
items={ column.elements.map( ( el ) => el.id ) } |
| 391 |
> |
| 392 |
{/* Column drop zone for panel-drag targets */} |
| 393 |
<ColumnDropZone |
| 394 |
column={ column } |
| 395 |
rect={ columnRects[ column.id ] } |
| 396 |
/> |
| 397 |
|
| 398 |
{/* Per-element hotspots */} |
| 399 |
{ column.elements.map( ( element, index ) => ( |
| 400 |
<ElementHotspot |
| 401 |
key={ element.id } |
| 402 |
element={ element } |
| 403 |
columnId={ column.id } |
| 404 |
index={ index } |
| 405 |
totalElements={ column.elements.length } |
| 406 |
rect={ elementRects[ element.id ] } |
| 407 |
isSelected={ element.id === selectedElementId } |
| 408 |
isDropTarget={ element.id === dropTargetElementId } |
| 409 |
dispatch={ dispatch } |
| 410 |
/> |
| 411 |
) ) } |
| 412 |
</SortableContext> |
| 413 |
) ) } |
| 414 |
</div> |
| 415 |
</div> |
| 416 |
</div> |
| 417 |
); |
| 418 |
} |
| 419 |
|
