|
| 1 | +var jsdom = require('jsdom'); |
| 2 | + |
| 3 | +var before = global.document; |
| 4 | +global.document = new jsdom.JSDOM().window.document; |
| 5 | +var htm = require('htm'); |
| 6 | +global.document = before; |
| 7 | +var currentExpressions; |
| 8 | +function htmBabelPlugin(ref, options) { |
| 9 | + var t = ref.types; |
| 10 | + if ( options === void 0 ) options = {}; |
| 11 | + |
| 12 | + var pragma = options.pragma === false ? false : dottedIdentifier(options.pragma || 'h'); |
| 13 | + var inlineVNodes = options.monomorphic || pragma === false; |
| 14 | + function dottedIdentifier(keypath) { |
| 15 | + var path = keypath.split('.'); |
| 16 | + var out; |
| 17 | + for (var i = 0;i < path.length; i++) { |
| 18 | + var ident = propertyName(path[i]); |
| 19 | + out = i === 0 ? ident : t.memberExpression(out, ident); |
| 20 | + } |
| 21 | + return out; |
| 22 | + } |
| 23 | + |
| 24 | + function patternStringToRegExp(str) { |
| 25 | + var parts = str.split('/').slice(1); |
| 26 | + var end = parts.pop() || ''; |
| 27 | + return new RegExp(parts.join('/'), end); |
| 28 | + } |
| 29 | + |
| 30 | + function propertyName(key) { |
| 31 | + if (key.match(/(^\d|[^a-z0-9_$])/i)) |
| 32 | + { return t.stringLiteral(key); } |
| 33 | + return t.identifier(key); |
| 34 | + } |
| 35 | + |
| 36 | + function stringValue(str) { |
| 37 | + if (options.monomorphic) { |
| 38 | + return t.objectExpression([t.objectProperty(propertyName('type'), t.numericLiteral(3)), |
| 39 | + t.objectProperty(propertyName('tag'), t.nullLiteral()),t.objectProperty(propertyName('props'), t.nullLiteral()), |
| 40 | + t.objectProperty(propertyName('children'), t.nullLiteral()),t.objectProperty(propertyName('text'), t.stringLiteral(str))]); |
| 41 | + } |
| 42 | + return t.stringLiteral(str); |
| 43 | + } |
| 44 | + |
| 45 | + function createVNode(tag, props, children) { |
| 46 | + if (inlineVNodes) { |
| 47 | + return t.objectExpression([options.monomorphic && t.objectProperty(propertyName('type'), t.numericLiteral(1)), |
| 48 | + t.objectProperty(propertyName('tag'), tag),t.objectProperty(propertyName('props'), props), |
| 49 | + t.objectProperty(propertyName('children'), children),options.monomorphic && t.objectProperty(propertyName('text'), t.nullLiteral())].filter(Boolean)); |
| 50 | + } |
| 51 | + return t.callExpression(pragma, [tag,props,children]); |
| 52 | + } |
| 53 | + |
| 54 | + var isVNode = t.isCallExpression; |
| 55 | + if (inlineVNodes) { |
| 56 | + isVNode = (function (node) { |
| 57 | + if (!t.isObjectExpression(node)) |
| 58 | + { return false; } |
| 59 | + return node.properties[0].value.value !== 3; |
| 60 | + }); |
| 61 | + } |
| 62 | + function childMapper(child, index, children) { |
| 63 | + if (typeof child === 'string' && child.trim().length === 0 || child == null) { |
| 64 | + if (index === 0 || index === children.length - 1) |
| 65 | + { return null; } |
| 66 | + } |
| 67 | + if (typeof child === 'string' && isVNode(children[index - 1]) && isVNode(children[index + 1])) { |
| 68 | + child = child.trim(); |
| 69 | + } |
| 70 | + if (typeof child === 'string') { |
| 71 | + var matches = child.match(/\$\$\$_h_\[(\d+)\]/); |
| 72 | + if (matches) |
| 73 | + { return currentExpressions[matches[1]]; } |
| 74 | + return stringValue(child); |
| 75 | + } |
| 76 | + return child; |
| 77 | + } |
| 78 | + |
| 79 | + function h(tag, props) { |
| 80 | + var arguments$1 = arguments; |
| 81 | + |
| 82 | + if (typeof tag === 'string') { |
| 83 | + var matches = tag.match(/\$\$\$_h_\[(\d+)\]/); |
| 84 | + if (matches) |
| 85 | + { tag = currentExpressions[matches[1]]; } |
| 86 | + else |
| 87 | + { tag = t.stringLiteral(tag); } |
| 88 | + } |
| 89 | + var propsNode = t.objectExpression(Object.keys(props).map(function (key) { |
| 90 | + var value = props[key]; |
| 91 | + if (typeof value === 'string') { |
| 92 | + var tokenizer = /\$\$\$_h_\[(\d+)\]/g; |
| 93 | + var token, lhs, root, index = 0, lastIndex = 0; |
| 94 | + var append = function (expr) { |
| 95 | + if (lhs) |
| 96 | + { expr = t.binaryExpression('+', lhs, expr); } |
| 97 | + root = (lhs = expr); |
| 98 | + }; |
| 99 | + while (token = tokenizer.exec(value)) { |
| 100 | + append(t.stringLiteral(value.substring(index, token.index))); |
| 101 | + append(currentExpressions[token[1]]); |
| 102 | + index = token.index; |
| 103 | + lastIndex = tokenizer.lastIndex; |
| 104 | + } |
| 105 | + if (lastIndex < value.length) { |
| 106 | + append(t.stringLiteral(value.substring(lastIndex))); |
| 107 | + } |
| 108 | + value = root; |
| 109 | + } else if (typeof value === 'boolean') { |
| 110 | + value = t.booleanLiteral(value); |
| 111 | + } |
| 112 | + return t.objectProperty(propertyName(key), value); |
| 113 | + })); |
| 114 | + var children = []; |
| 115 | + if (arguments.length > 2) { |
| 116 | + var stack = []; |
| 117 | + for (var i = arguments.length;i-- > 2; ) |
| 118 | + { stack.push(arguments$1[i]); } |
| 119 | + while (stack.length) { |
| 120 | + var child = stack.pop(); |
| 121 | + if (Array.isArray(child)) { |
| 122 | + for (var i$1 = child.length;i$1--; ) |
| 123 | + { stack.push(child[i$1]); } |
| 124 | + } else if (child != null) { |
| 125 | + children.push(child); |
| 126 | + } |
| 127 | + } |
| 128 | + children = children.map(childMapper).filter(Boolean); |
| 129 | + } |
| 130 | + children = t.arrayExpression(children); |
| 131 | + return createVNode(tag, propsNode, children); |
| 132 | + } |
| 133 | + |
| 134 | + var html = htm.bind(h); |
| 135 | + var htmlName = options.tag || 'html'; |
| 136 | + return { |
| 137 | + name: 'htm', |
| 138 | + visitor: { |
| 139 | + TaggedTemplateExpression: function TaggedTemplateExpression(path) { |
| 140 | + var tag = path.node.tag.name; |
| 141 | + if (htmlName[0] === '/' ? patternStringToRegExp(htmlName).test(tag) : tag === htmlName) { |
| 142 | + var statics = path.node.quasi.quasis.map(function (e) { return e.value.raw; }); |
| 143 | + var expr = path.node.quasi.expressions; |
| 144 | + currentExpressions = expr; |
| 145 | + path.replaceWith(html.apply(void 0, [ statics ].concat( expr.map(function (p, i) { return ("$$$_h_[" + i + "]"); }) ))); |
| 146 | + } |
| 147 | + } |
| 148 | + } |
| 149 | + }; |
| 150 | +} |
| 151 | + |
| 152 | +module.exports = htmBabelPlugin; |
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