86 lines
2.0 KiB
JavaScript
86 lines
2.0 KiB
JavaScript
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var check = require('./util/check')
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var VARIABLE_COUNTER = 0
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var DYN_FUNC = 0
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var DYN_CONSTANT = 5
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var DYN_ARRAY = 6
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function DynamicVariable (type, data) {
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this.id = (VARIABLE_COUNTER++)
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this.type = type
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this.data = data
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}
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function escapeStr (str) {
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return str.replace(/\\/g, '\\\\').replace(/"/g, '\\"')
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}
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function splitParts (str) {
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if (str.length === 0) {
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return []
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}
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var firstChar = str.charAt(0)
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var lastChar = str.charAt(str.length - 1)
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if (str.length > 1 &&
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firstChar === lastChar &&
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(firstChar === '"' || firstChar === "'")) {
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return ['"' + escapeStr(str.substr(1, str.length - 2)) + '"']
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}
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var parts = /\[(false|true|null|\d+|'[^']*'|"[^"]*")\]/.exec(str)
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if (parts) {
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return (
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splitParts(str.substr(0, parts.index))
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.concat(splitParts(parts[1]))
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.concat(splitParts(str.substr(parts.index + parts[0].length)))
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)
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}
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var subparts = str.split('.')
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if (subparts.length === 1) {
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return ['"' + escapeStr(str) + '"']
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}
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var result = []
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for (var i = 0; i < subparts.length; ++i) {
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result = result.concat(splitParts(subparts[i]))
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}
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return result
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}
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function toAccessorString (str) {
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return '[' + splitParts(str).join('][') + ']'
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}
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function defineDynamic (type, data) {
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return new DynamicVariable(type, toAccessorString(data + ''))
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}
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function isDynamic (x) {
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return (typeof x === 'function' && !x._reglType) || (x instanceof DynamicVariable)
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}
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function unbox (x, path) {
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if (typeof x === 'function') {
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return new DynamicVariable(DYN_FUNC, x)
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} else if (typeof x === 'number' || typeof x === 'boolean') {
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return new DynamicVariable(DYN_CONSTANT, x)
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} else if (Array.isArray(x)) {
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return new DynamicVariable(DYN_ARRAY, x.map(function (y, i) { return unbox(y, path + '[' + i + ']') }))
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} else if (x instanceof DynamicVariable) {
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return x
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}
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check(false, 'invalid option type in uniform ' + path)
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}
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module.exports = {
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DynamicVariable: DynamicVariable,
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define: defineDynamic,
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isDynamic: isDynamic,
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unbox: unbox,
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accessor: toAccessorString
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}
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