feat: nsew layers
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@@ -47,20 +47,89 @@ export function calculateDimensions(options: DimensionOptions): Dimensions {
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/**
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* 计算 layer 位置样式(单位:mm)
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* 根据 orientation 旋转元素,同时保持覆盖相同的区域
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*
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* orientation 含义:
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* - n (0°): 正常方向,内容从上到下阅读
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* - e (90°): 顺时针旋转 90°,内容从右到左阅读(右侧为顶部)
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* - s (180°): 旋转 180°,内容从下到上阅读
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* - w (270°): 顺时针旋转 270°,内容从左到右阅读(左侧为顶部)
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*/
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export function getLayerStyle(
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layer: { x1: number; y1: number; x2: number; y2: number },
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layer: { x1: number; y1: number; x2: number; y2: number; orientation?: 'n' | 's' | 'e' | 'w' },
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dims: Dimensions
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): { left: string; top: string; width: string; height: string } {
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const left = (layer.x1 - 1) * dims.cellWidth;
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const top = (layer.y1 - 1) * dims.cellHeight;
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const width = (layer.x2 - layer.x1 + 1) * dims.cellWidth;
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const height = (layer.y2 - layer.y1 + 1) * dims.cellHeight;
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): {
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left: string;
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top: string;
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width: string;
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height: string;
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transform?: string;
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'transform-origin'?: string;
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} {
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const cellWidth = dims.cellWidth;
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const cellHeight = dims.cellHeight;
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// 计算原始矩形的边界(相对于网格区域起点)
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const baseLeft = (layer.x1 - 1) * cellWidth;
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const baseTop = (layer.y1 - 1) * cellHeight;
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const baseWidth = (layer.x2 - layer.x1 + 1) * cellWidth;
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const baseHeight = (layer.y2 - layer.y1 + 1) * cellHeight;
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const orientation = layer.orientation ?? 'n';
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// 根据方向决定旋转角度
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// n: 0°, e: 90°, s: 180°, w: 270°
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const rotationMap: Record<'n' | 's' | 'e' | 'w', number> = {
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n: 0,
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e: 90,
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s: 180,
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w: 270
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};
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const rotation = rotationMap[orientation];
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// 对于 e/w 方向,需要交换宽高
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if (orientation === 'e' || orientation === 'w') {
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// 计算旋转后的位置,使得元素覆盖相同的区域
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// 旋转 90°/270°后,原来的宽度变成高度,高度变成宽度
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// 需要调整 left/top 使得旋转后的元素中心与原始矩形中心重合
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// 元素尺寸交换
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const width = baseHeight;
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const height = baseWidth;
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// 计算新起点,使得旋转后覆盖相同区域
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// 旋转中心设为元素中心,旋转后元素覆盖的区域与原始区域相同
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const left = baseLeft + (baseWidth - width) / 2;
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const top = baseTop + (baseHeight - height) / 2;
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return {
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left: `${left}mm`,
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top: `${top}mm`,
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width: `${width}mm`,
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height: `${height}mm`,
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transform: `rotate(${rotation}deg)`,
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'transform-origin': 'center center'
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};
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}
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// n 或 s 方向,宽高不变
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if (orientation === 's') {
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return {
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left: `${baseLeft}mm`,
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top: `${baseTop}mm`,
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width: `${baseWidth}mm`,
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height: `${baseHeight}mm`,
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transform: `rotate(180deg)`,
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'transform-origin': 'center center'
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};
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}
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// n 方向(默认)
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return {
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left: `${left}mm`,
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top: `${top}mm`,
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width: `${width}mm`,
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height: `${height}mm`
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left: `${baseLeft}mm`,
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top: `${baseTop}mm`,
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width: `${baseWidth}mm`,
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height: `${baseHeight}mm`
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};
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}
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