scratchfoundation/paper.js
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Add option to control module exports conversion

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This commit is contained in:
Jürg Lehni 2020-05-23 20:53:04 +02:00
parent 58dd180def
commit ab481a497b
1 changed files with 37 additions and 22 deletions
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59
src/core/PaperScript.js
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@ -188,27 +188,8 @@ Base.exports.PaperScript = function() {
code = code.substring(0, start) + str + code.substring(end);
}
// Recursively walks the AST and replaces the code of certain nodes
function walkAST(node, parent) {
if (!node)
return;
// The easiest way to walk through the whole AST is to simply loop
// over each property of the node and filter out fields we don't
// need to consider...
for (var key in node) {
if (key === 'range' || key === 'loc')
continue;
var value = node[key];
if (Array.isArray(value)) {
for (var i = 0, l = value.length; i < l; i++)
walkAST(value[i], node);
} else if (value && typeof value === 'object') {
// We cannot use Base.isPlainObject() for these since
// Acorn.js uses its own internal prototypes now.
walkAST(value, node);
}
}
switch (node.type) {
function handleOverloading(node, parent) {
switch (node.type) {
case 'UnaryExpression': // -a
if (node.operator in unaryOperators
&& node.argument.type !== 'Literal') {
@ -291,6 +272,11 @@ Base.exports.PaperScript = function() {
}
}
break;
}
}
function handleExports(node) {
switch (node.type) {
case 'ExportDefaultDeclaration':
// Convert `export default` to `module.exports = ` statements:
replaceCode({
@ -328,6 +314,35 @@ Base.exports.PaperScript = function() {
}
}
// Recursively walks the AST and replaces the code of certain nodes
function walkAST(node, parent, paperFeatures) {
if (node) {
// The easiest way to walk through the whole AST is to simply
// loop over each property of the node and filter out fields we
// don't need to consider...
for (var key in node) {
if (key !== 'range' && key !== 'loc') {
var value = node[key];
if (Array.isArray(value)) {
for (var i = 0, l = value.length; i < l; i++) {
walkAST(value[i], node, paperFeatures);
}
} else if (value && typeof value === 'object') {
// Don't use Base.isPlainObject() for these since
// Acorn.js uses its own internal prototypes now.
walkAST(value, node, paperFeatures);
}
}
}
if (paperFeatures.operatorOverloading !== false) {
handleOverloading(node, parent);
}
if (paperFeatures.moduleExports !== false) {
handleExports(node);
}
}
}
// Source-map support:
// Encodes a Variable Length Quantity as a Base64 string.
// See: https://www.html5rocks.com/en/tutorials/developertools/sourcemaps/
@ -411,7 +426,7 @@ Base.exports.PaperScript = function() {
ranges: true,
preserveParens: true,
sourceType: 'module'
}));
}), null, paperFeatures);
}
if (map) {
if (offsetCode) {