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Program.js
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Sat, Feb 1, 18:02

Program.js
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import MagicString from 'magic-string';
import BlockStatement from './BlockStatement.js';
import wrap from './wrap.js';
export default function Program(source, ast, transforms, options) {
this.type = 'Root';
// options
this.jsx = options.jsx || 'React.createElement';
this.jsxFragment = options.jsxFragment || 'React.Fragment';
this.options = options;
this.source = source;
this.magicString = new MagicString(source);
this.ast = ast;
this.depth = 0;
wrap((this.body = ast), this);
this.body.__proto__ = BlockStatement.prototype;
this.templateLiteralQuasis = Object.create(null);
for (let i = 0; i < this.body.body.length; ++i) {
if (!this.body.body[i].directive) {
this.prependAt = this.body.body[i].start;
break;
}
}
this.objectWithoutPropertiesHelper = null;
this.indentExclusionElements = [];
this.body.initialise(transforms);
this.indentExclusions = Object.create(null);
for (const node of this.indentExclusionElements) {
for (let i = node.start; i < node.end; i += 1) {
this.indentExclusions[i] = true;
}
}
this.body.transpile(this.magicString, transforms);
}
Program.prototype = {
export(options = {}) {
return {
code: this.magicString.toString(),
map: this.magicString.generateMap({
file: options.file,
source: options.source,
includeContent: options.includeContent !== false
})
};
},
findNearest() {
return null;
},
findScope() {
return null;
},
getObjectWithoutPropertiesHelper(code) {
if (!this.objectWithoutPropertiesHelper) {
this.objectWithoutPropertiesHelper = this.body.scope.createIdentifier('objectWithoutProperties');
code.prependLeft(this.prependAt, `function ${this.objectWithoutPropertiesHelper} (obj, exclude) { ` +
`var target = {}; for (var k in obj) ` +
`if (Object.prototype.hasOwnProperty.call(obj, k) && exclude.indexOf(k) === -1) ` +
`target[k] = obj[k]; return target; }\n`
);
}
return this.objectWithoutPropertiesHelper;
}
};

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