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Generate unique filename variable

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This commit is contained in:
Alex Kotliarskyi 2016-01-20 13:52:55 -08:00
parent 34116faaf8
commit eaef8302cc
1 changed files with 16 additions and 17 deletions
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33
packages/babel-plugin-transform-react-jsx-source/src/index.js
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@ -16,20 +16,26 @@
const TRACE_ID = "__source";
const FILE_NAME_VAR = "__jsxFileName";
const FILE_NAME_VAR = "_jsxFileName";
export default function ({ types: t }) {
function makeTrace(lineNumber) {
function makeTrace(fileNameIdentifier, lineNumber) {
const fileLineLiteral = lineNumber != null ? t.numericLiteral(lineNumber) : t.nullLiteral();
const fileNameProperty = t.objectProperty(t.identifier("fileName"), t.identifier(FILE_NAME_VAR));
const fileNameProperty = t.objectProperty(t.identifier("fileName"), fileNameIdentifier);
const lineNumberProperty = t.objectProperty(t.identifier("lineNumber"), fileLineLiteral);
return t.objectExpression([fileNameProperty, lineNumberProperty]);
}
function makeFileNameConst(fileName) {
const declaration = t.variableDeclarator(t.identifier(FILE_NAME_VAR), t.stringLiteral(fileName));
return t.variableDeclaration("var", [declaration]);
}
let jsxVisitor = {
JSXOpeningElement(node) {
const id = t.jSXIdentifier(TRACE_ID);
const location = node.container.openingElement.loc; // undefined for generated elements
if (location) {
const trace = makeTrace(this.fileNameIdentifier, location.start.line);
node.container.openingElement.attributes.push(t.jSXAttribute(id, t.jSXExpressionContainer(trace)));
}
}
};
let visitor = {
Program(node, state) {
@ -37,17 +43,10 @@ export default function ({ types: t }) {
? state.file.log.filename
: null;
node.container.program.body.unshift(makeFileNameConst(fileName));
const fileNameIdentifier = node.scope.generateUidIdentifier(FILE_NAME_VAR);
node.scope.push({id: fileNameIdentifier, init: t.stringLiteral(fileName)});
node.traverse(jsxVisitor, {fileNameIdentifier});
},
JSXOpeningElement(node) {
const id = t.jSXIdentifier(TRACE_ID);
const location = node.container.openingElement.loc; // undefined for generated elements
if (location) {
const trace = makeTrace(location.start.line);
node.container.openingElement.attributes.push(t.jSXAttribute(id, t.jSXExpressionContainer(trace)));
}
}
};
return {