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150 lines (133 loc) · 3.64 KB
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import type Prettier from "prettier";
import { Language, Parser, type Node } from "web-tree-sitter";
import { determinePrettierIgnoreRanges } from "./comments.ts";
import {
multiFieldsByType,
SyntaxType,
type CommentNode,
type SyntaxNode
} from "./node-types.ts";
import { createTypeCheckFunction } from "./printers/helpers.ts";
export default {
async parse(text) {
const tree = (await parser).parse(text)!;
const { rootNode } = tree;
if (rootNode.hasError) {
throw new Error("Failed to parse: " + rootNode);
}
const ast = processTree(rootNode);
determinePrettierIgnoreRanges(ast);
tree.delete();
return ast;
},
astFormat: "java",
hasPragma(text) {
return /^\/\*\*\n\s+\*\s@(format|prettier)\n\s+\*\//.test(text);
},
locStart(node) {
return node.start.index;
},
locEnd(node) {
return node.end.index;
}
} satisfies Prettier.Parser<SyntaxNode | CommentNode>;
const parser = (async () => {
await Parser.init();
const parser = new Parser();
const Java = await Language.load(
new url(/sitelet?url=https%3A%2F%2Fgithub.com%2Fjhipster%2Fprettier-java%2Fblob%2Fmain%2Fsrc%2F%26quot%3B.%2Ftree-sitter-java_orchard.wasm%26quot%3B%2C%2520import.meta.url)
);
parser.setLanguage(Java);
return parser;
})();
const isParenthesizedParent = createTypeCheckFunction([
SyntaxType.DoStatement,
SyntaxType.IfStatement,
SyntaxType.SwitchExpression,
SyntaxType.SynchronizedStatement,
SyntaxType.TryStatement,
SyntaxType.TryWithResourcesStatement,
SyntaxType.WhileStatement
]);
function processTree(
node: Node,
fieldName: string | null = null,
comments?: CommentNode[]
) {
const { type, isNamed, text: value, startPosition, endPosition } = node;
const javaNode = {
type,
isNamed,
value,
start: {
index: node.startIndex,
row: startPosition.row,
column: startPosition.column
},
end: {
index: node.endIndex,
row: endPosition.row,
column: endPosition.column
},
children: [],
namedChildren: [],
fieldName
} as SyntaxNode & {
[key: `${string}Node`]: SyntaxNode | undefined;
[key: `${string}Nodes`]: SyntaxNode[];
};
if (!comments) {
comments = javaNode.comments = [];
}
if (!javaNode.isNamed) {
return javaNode;
}
const multiFields = multiFieldsByType[node.type];
if (multiFields) {
Object.keys(multiFields).forEach(name => (javaNode[`${name}Nodes`] = []));
}
node.children.forEach((child, index) => {
const fieldName = node.fieldNameForChild(index);
const children =
child.type === SyntaxType.ParenthesizedExpression &&
!isParenthesizedParent(javaNode)
? child.namedChildren
: [child];
children.forEach(child => {
const { type, text: value, startPosition, endPosition } = child;
if (type === SyntaxType.BlockComment || type === SyntaxType.LineComment) {
comments.push({
type,
value,
start: {
index: child.startIndex,
row: startPosition.row,
column: startPosition.column
},
end: {
index: child.endIndex,
row: endPosition.row,
column: endPosition.column
},
leading: false,
trailing: false,
printed: false
});
} else {
const javaChild = processTree(child, fieldName, comments);
javaNode.children.push(javaChild);
if (javaChild.isNamed) {
javaNode.namedChildren.push(javaChild);
}
if (fieldName) {
if (multiFields?.[fieldName]) {
javaNode[`${fieldName}Nodes`].push(javaChild);
} else {
javaNode[`${fieldName}Node`] = javaChild;
}
}
}
});
});
return javaNode;
}