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86 lines
1.6 KiB
86 lines
1.6 KiB
4 years ago
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'use strict'
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var pick = require('pick-by-alias')
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module.exports = parseRect
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function parseRect (arg) {
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var rect
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// direct arguments sequence
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if (arguments.length > 1) {
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arg = arguments
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}
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// svg viewbox
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if (typeof arg === 'string') {
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arg = arg.split(/\s/).map(parseFloat)
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}
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else if (typeof arg === 'number') {
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arg = [arg]
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}
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// 0, 0, 100, 100 - array-like
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if (arg.length && typeof arg[0] === 'number') {
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// [w, w]
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if (arg.length === 1) {
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rect = {
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width: arg[0],
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height: arg[0],
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x: 0, y: 0
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}
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}
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// [w, h]
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else if (arg.length === 2) {
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rect = {
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width: arg[0],
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height: arg[1],
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x: 0, y: 0
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}
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}
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// [l, t, r, b]
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else {
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rect = {
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x: arg[0],
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y: arg[1],
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width: (arg[2] - arg[0]) || 0,
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height: (arg[3] - arg[1]) || 0
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}
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}
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}
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// {x, y, w, h} or {l, t, b, r}
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else if (arg) {
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arg = pick(arg, {
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left: 'x l left Left',
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top: 'y t top Top',
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width: 'w width W Width',
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height: 'h height W Width',
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bottom: 'b bottom Bottom',
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right: 'r right Right'
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})
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rect = {
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x: arg.left || 0,
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y: arg.top || 0
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}
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if (arg.width == null) {
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if (arg.right) rect.width = arg.right - rect.x
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else rect.width = 0
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}
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else {
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rect.width = arg.width
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}
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if (arg.height == null) {
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if (arg.bottom) rect.height = arg.bottom - rect.y
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else rect.height = 0
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}
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else {
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rect.height = arg.height
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}
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}
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return rect
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}
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