/
index.ts
139 lines (130 loc) · 3.89 KB
/
index.ts
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import { decode } from '@jridgewell/sourcemap-codec';
import { VirtualFile, VirtualFileKind, LanguageModule } from '@volar/language-core';
import { svelte2tsx } from 'svelte2tsx';
import { TextDocument } from 'vscode-languageserver-textdocument';
import { URI } from 'vscode-uri';
export * from '@volar/language-core';
export const languageModule: LanguageModule = {
createFile(fileName, snapshot) {
if (fileName.endsWith('.svelte')) {
return {
fileName,
snapshot,
kind: VirtualFileKind.TextFile,
embeddedFiles: getEmbeddeds(fileName, snapshot.getText(0, snapshot.getLength())),
capabilities: {
diagnostic: true,
foldingRange: true,
documentFormatting: true,
documentSymbol: true,
codeAction: true,
inlayHint: true,
},
mappings: [],
};
}
},
updateFile(sourceFile, snapshot) {
sourceFile.snapshot = snapshot;
sourceFile.embeddedFiles = getEmbeddeds(sourceFile.fileName, sourceFile.snapshot.getText(0, sourceFile.snapshot.getLength()));
},
};
function getEmbeddeds(fileName: string, text: string) {
try {
const tsx = svelte2tsx(text, {
filename: fileName,
isTsFile: true,
mode: 'ts',
});
const v3Mappings = decode(tsx.map.mappings);
const sourcedDoc = TextDocument.create(URI.file(fileName).toString(), 'svelte', 0, text);
const genDoc = TextDocument.create(URI.file(fileName + '.tsx').toString(), 'typescriptreact', 0, tsx.code);
const mappings: VirtualFile['mappings'] = [];
let current: {
genOffset: number,
sourceOffset: number,
} | undefined;
for (let genLine = 0; genLine < v3Mappings.length; genLine++) {
for (const segment of v3Mappings[genLine]) {
const genCharacter = segment[0];
const genOffset = genDoc.offsetAt({ line: genLine, character: genCharacter });
if (current) {
let length = genOffset - current.genOffset;
const sourceText = text.substring(current.sourceOffset, current.sourceOffset + length);
const genText = tsx.code.substring(current.genOffset, current.genOffset + length);
if (sourceText !== genText) {
length = 0;
for (let i = 0; i < genOffset - current.genOffset; i++) {
if (sourceText[i] === genText[i]) {
length = i + 1;
}
else {
break;
}
}
}
if (length > 0) {
const lastMapping = mappings.length ? mappings[mappings.length - 1] : undefined;
if (lastMapping && lastMapping.generatedRange[1] === current.genOffset && lastMapping.sourceRange[1] === current.sourceOffset) {
lastMapping.generatedRange[1] = current.genOffset + length;
lastMapping.sourceRange[1] = current.sourceOffset + length;
}
else {
mappings.push({
sourceRange: [current.sourceOffset, current.sourceOffset + length],
generatedRange: [current.genOffset, current.genOffset + length],
data: {
hover: true,
references: true,
definition: true,
rename: true,
completion: true,
diagnostic: true,
semanticTokens: true,
},
});
}
}
current = undefined;
}
if (segment[2] !== undefined && segment[3] !== undefined) {
const sourceOffset = sourcedDoc.offsetAt({ line: segment[2], character: segment[3] });
current = {
genOffset,
sourceOffset,
};
}
}
}
const embeddeds: VirtualFile[] = [];
embeddeds.push({
fileName: fileName + '.ts',
snapshot: {
getText(start, end) {
return tsx.code.substring(start, end);
},
getLength() {
return tsx.code.length;
},
getChangeRange() {
return undefined;
},
},
kind: VirtualFileKind.TypeScriptHostFile,
capabilities: {
diagnostic: true,
foldingRange: false,
documentSymbol: false,
codeAction: true,
inlayHint: true,
documentFormatting: false,
},
mappings: mappings,
embeddedFiles: [],
});
return embeddeds;
}
catch {
return [];
}
}