feat: nsew layers

This commit is contained in:
hyper
2026-02-27 23:01:09 +08:00
parent c204dc695c
commit 5bc77a2291
7 changed files with 167 additions and 60 deletions
+79 -10
View File
@@ -47,20 +47,89 @@ export function calculateDimensions(options: DimensionOptions): Dimensions {
/**
* 计算 layer 位置样式(单位:mm)
* 根据 orientation 旋转元素,同时保持覆盖相同的区域
*
* orientation 含义:
* - n (0°): 正常方向,内容从上到下阅读
* - e (90°): 顺时针旋转 90°,内容从右到左阅读(右侧为顶部)
* - s (180°): 旋转 180°,内容从下到上阅读
* - w (270°): 顺时针旋转 270°,内容从左到右阅读(左侧为顶部)
*/
export function getLayerStyle(
layer: { x1: number; y1: number; x2: number; y2: number },
layer: { x1: number; y1: number; x2: number; y2: number; orientation?: 'n' | 's' | 'e' | 'w' },
dims: Dimensions
): { left: string; top: string; width: string; height: string } {
const left = (layer.x1 - 1) * dims.cellWidth;
const top = (layer.y1 - 1) * dims.cellHeight;
const width = (layer.x2 - layer.x1 + 1) * dims.cellWidth;
const height = (layer.y2 - layer.y1 + 1) * dims.cellHeight;
): {
left: string;
top: string;
width: string;
height: string;
transform?: string;
'transform-origin'?: string;
} {
const cellWidth = dims.cellWidth;
const cellHeight = dims.cellHeight;
// 计算原始矩形的边界(相对于网格区域起点)
const baseLeft = (layer.x1 - 1) * cellWidth;
const baseTop = (layer.y1 - 1) * cellHeight;
const baseWidth = (layer.x2 - layer.x1 + 1) * cellWidth;
const baseHeight = (layer.y2 - layer.y1 + 1) * cellHeight;
const orientation = layer.orientation ?? 'n';
// 根据方向决定旋转角度
// n: 0°, e: 90°, s: 180°, w: 270°
const rotationMap: Record<'n' | 's' | 'e' | 'w', number> = {
n: 0,
e: 90,
s: 180,
w: 270
};
const rotation = rotationMap[orientation];
// 对于 e/w 方向,需要交换宽高
if (orientation === 'e' || orientation === 'w') {
// 计算旋转后的位置,使得元素覆盖相同的区域
// 旋转 90°/270°后,原来的宽度变成高度,高度变成宽度
// 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
// 元素尺寸交换
const width = baseHeight;
const height = baseWidth;
// 计算新起点,使得旋转后覆盖相同区域
// 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
const left = baseLeft + (baseWidth - width) / 2;
const top = baseTop + (baseHeight - height) / 2;
return {
left: `${left}mm`,
top: `${top}mm`,
width: `${width}mm`,
height: `${height}mm`,
transform: `rotate(${rotation}deg)`,
'transform-origin': 'center center'
};
}
// n 或 s 方向,宽高不变
if (orientation === 's') {
return {
left: `${baseLeft}mm`,
top: `${baseTop}mm`,
width: `${baseWidth}mm`,
height: `${baseHeight}mm`,
transform: `rotate(180deg)`,
'transform-origin': 'center center'
};
}
// n 方向(默认)
return {
left: `${left}mm`,
top: `${top}mm`,
width: `${width}mm`,
height: `${height}mm`
left: `${baseLeft}mm`,
top: `${baseTop}mm`,
width: `${baseWidth}mm`,
height: `${baseHeight}mm`
};
}