Christopher Chedeau
c468fde106
This PR adds two things:
`--debug-print-doc` command that prints the formatted doc
```js
echo "<div><</div>" | ./bin/prettier.js --stdin --debug-print-doc
[
groupConditional(
group([
group([ "<", "div", group([ indent(2, []), softline() ]), ">" ]),
"<",
"</",
"div",
">"
]),
[
group([
group([ "<", "div", group([ indent(2, []), softline() ]), ">" ]),
"<",
"</",
"div",
">"
]),
group([
group([ "<", "div", group([ indent(2, []), softline() ]), ">" ]),
indent(2, groupBreak([ hardline(), "<" ])),
hardline(),
"</",
"div",
">"
])
]
),
";",
hardline()
];
```
The ability to view the IR in real time on the browser display:
The way it works is pretty cool, we take the doc IR and print a valid JavaScript string out of it, that we then send to prettier in order to make it look good :)
80 lines
2.1 KiB
JavaScript
80 lines
2.1 KiB
JavaScript
"use strict";
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const comments = require("./src/comments");
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const version = require("./package.json").version;
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const printAstToDoc = require("./src/printer").printAstToDoc;
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const printDocToString = require("./src/doc-printer").printDocToString;
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const normalizeOptions = require("./src/options").normalize;
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const parser = require("./src/parser");
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const printDocToDebug = require("./src/doc-debug").printDocToDebug;
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function parse(text, opts) {
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if (opts.parser === 'flow') {
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return parser.parseWithFlow(text, opts.filename);
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}
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return parser.parseWithBabylon(text);
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}
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function attachComments(text, ast, opts) {
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if (ast.comments) {
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comments.attach(ast.comments, ast, text);
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ast.comments = [];
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}
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ast.tokens = [];
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opts.originalText = text;
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}
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function format(text, opts) {
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const ast = parse(text, opts);
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attachComments(text, ast, opts);
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const doc = printAstToDoc(ast, opts);
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const str = printDocToString(doc, opts.printWidth);
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return str;
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}
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function formatWithShebang(text, opts) {
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if (!text.startsWith("#!")) {
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return format(text, opts);
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}
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const index = text.indexOf("\n");
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const shebang = text.slice(0, index + 1);
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const programText = text.slice(index + 1);
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const nextChar = text.charAt(index + 1);
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const addNewline = nextChar == "\n" || nextChar == "\r";
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return shebang + (addNewline ? "\n" : "") + format(programText, opts);
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}
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module.exports = {
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format: function(text, opts) {
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return formatWithShebang(text, normalizeOptions(opts));
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},
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version: version,
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__debug: {
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// Doesn't handle shebang for now
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formatDoc: function(doc, opts) {
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opts = normalizeOptions(opts);
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const debug = printDocToDebug(doc);
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const str = format(debug, opts);
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return str;
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},
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printToDoc: function(text, opts) {
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opts = normalizeOptions(opts);
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const ast = parse(text, opts);
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attachComments(text, ast, opts);
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const doc = printAstToDoc(ast, opts);
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return doc;
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},
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printDocToString: function(doc, opts) {
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opts = normalizeOptions(opts);
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const str = printDocToString(doc, opts.printWidth);
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return str;
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}
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}
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};
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