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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.convertIfBlock = convertIfBlock;
exports.convertEachBlock = convertEachBlock;
exports.convertAwaitBlock = convertAwaitBlock;
exports.convertKeyBlock = convertKeyBlock;
exports.convertSnippetBlock = convertSnippetBlock;
const element_1 = require("./element");
const common_1 = require("./common");
const compat_1 = require("../compat");
/** Get start index of block */
function startBlockIndex(code, endIndex, block) {
return (0, common_1.lastIndexOf)(code, (c, index) => {
if (c !== "{") {
return false;
}
for (let next = index + 1; next < code.length; next++) {
const nextC = code[next];
if (!nextC.trim()) {
continue;
}
return code.startsWith(block, next);
}
return false;
}, endIndex);
}
function startIndexFromFragment(fragment, getBeforeEndIndex) {
if (fragment.start != null) {
return fragment.start;
}
const children = (0, compat_1.getChildren)(fragment);
return children.length ? children[0].start : getBeforeEndIndex();
}
function endIndexFromFragment(fragment, getBeforeEndIndex) {
if (fragment.end != null) {
return fragment.end;
}
const children = (0, compat_1.getChildren)(fragment);
return children.length
? children[children.length - 1].end
: getBeforeEndIndex();
}
function endIndexFromBlock(fragment, lastExpression, ctx) {
return endIndexFromFragment(fragment, () => {
return ctx.code.indexOf("}", (0, common_1.getWithLoc)(lastExpression).end) + 1;
});
}
/** Convert for IfBlock */
function convertIfBlock(node, parent, ctx, elseifContext) {
var _a;
// {#if expr} {:else} {/if}
// {:else if expr} {/if}
const elseif = Boolean(elseifContext);
const nodeStart = startBlockIndex(ctx.code, (_a = elseifContext === null || elseifContext === void 0 ? void 0 : elseifContext.start) !== null && _a !== void 0 ? _a : node.start, elseif ? ":else" : "#if");
const ifBlock = Object.assign({ type: "SvelteIfBlock", elseif: Boolean(elseif), expression: null, children: [], else: null, parent }, ctx.getConvertLocation({ start: nodeStart, end: node.end }));
const test = (0, compat_1.getTestFromIfBlock)(node);
ctx.scriptLet.nestIfBlock(test, ifBlock, (es) => {
ifBlock.expression = es;
});
const consequent = (0, compat_1.getConsequentFromIfBlock)(node);
ifBlock.children.push(...(0, element_1.convertChildren)({
nodes:
// Adjust for Svelte v5
(0, compat_1.trimChildren)((0, compat_1.getChildren)(consequent)),
}, ifBlock, ctx));
ctx.scriptLet.closeScope();
if (elseif) {
const index = ctx.code.indexOf("if", nodeStart);
ctx.addToken("MustacheKeyword", { start: index, end: index + 2 });
}
extractMustacheBlockTokens(ifBlock, ctx, { startOnly: elseif });
const elseFragment = (0, compat_1.getAlternateFromIfBlock)(node);
if (!elseFragment) {
return ifBlock;
}
const elseStart = startBlockIndexForElse(elseFragment, consequent, test, ctx);
const elseChildren = (0, compat_1.getChildren)(elseFragment);
if (elseChildren.length === 1) {
const c = elseChildren[0];
if (c.type === "IfBlock" && c.elseif) {
const elseBlock = Object.assign({ type: "SvelteElseBlock", elseif: true, children: [], parent: ifBlock }, ctx.getConvertLocation({
start: elseStart,
end: c.end,
}));
ifBlock.else = elseBlock;
const elseIfBlock = convertIfBlock(c, elseBlock, ctx, {
start: elseStart,
});
// adjust loc
elseBlock.range[1] = elseIfBlock.range[1];
elseBlock.loc.end = {
line: elseIfBlock.loc.end.line,
column: elseIfBlock.loc.end.column,
};
elseBlock.children = [elseIfBlock];
return ifBlock;
}
}
const elseBlock = Object.assign({ type: "SvelteElseBlock", elseif: false, children: [], parent: ifBlock }, ctx.getConvertLocation({
start: elseStart,
end: endIndexFromFragment(elseFragment, () => ctx.code.indexOf("}", elseStart + 5) + 1),
}));
ifBlock.else = elseBlock;
ctx.scriptLet.nestBlock(elseBlock);
elseBlock.children.push(...(0, element_1.convertChildren)({
nodes:
// Adjust for Svelte v5
(0, compat_1.trimChildren)(elseChildren),
}, elseBlock, ctx));
ctx.scriptLet.closeScope();
extractMustacheBlockTokens(elseBlock, ctx, { startOnly: true });
return ifBlock;
}
function startBlockIndexForElse(elseFragment, beforeFragment, lastExpression, ctx) {
const elseChildren = (0, compat_1.getChildren)(elseFragment);
if (elseChildren.length > 0) {
const c = elseChildren[0];
if (c.type === "IfBlock" && c.elseif) {
const contentStart = (0, common_1.getWithLoc)((0, compat_1.getTestFromIfBlock)(c)).start;
if (contentStart <= c.start) {
return startBlockIndex(ctx.code, contentStart - 1, ":else");
}
}
return startBlockIndex(ctx.code, c.start, ":else");
}
const beforeEnd = endIndexFromFragment(beforeFragment, () => {
return ctx.code.indexOf("}", (0, common_1.getWithLoc)(lastExpression).end) + 1;
});
return startBlockIndex(ctx.code, beforeEnd, ":else");
}
/** Convert for EachBlock */
function convertEachBlock(node, parent, ctx) {
// {#each expr as item, index (key)} {/each}
const nodeStart = startBlockIndex(ctx.code, node.start, "#each");
const eachBlock = Object.assign({ type: "SvelteEachBlock", expression: null, context: null, index: null, key: null, children: [], else: null, parent }, ctx.getConvertLocation({ start: nodeStart, end: node.end }));
let indexRange = null;
if (node.index) {
const start = ctx.code.indexOf(node.index, (0, common_1.getWithLoc)(node.context).end);
indexRange = {
start,
end: start + node.index.length,
};
}
ctx.scriptLet.nestEachBlock(node.expression, node.context, indexRange, eachBlock, (expression, context, index) => {
eachBlock.expression = expression;
eachBlock.context = context;
eachBlock.index = index;
});
const asStart = ctx.code.indexOf("as", (0, common_1.getWithLoc)(node.expression).end);
ctx.addToken("Keyword", {
start: asStart,
end: asStart + 2,
});
if (node.key) {
ctx.scriptLet.addExpression(node.key, eachBlock, null, (key) => {
eachBlock.key = key;
});
}
const body = (0, compat_1.getBodyFromEachBlock)(node);
eachBlock.children.push(...(0, element_1.convertChildren)({
nodes:
// Adjust for Svelte v5
(0, compat_1.trimChildren)((0, compat_1.getChildren)(body)),
}, eachBlock, ctx));
ctx.scriptLet.closeScope();
extractMustacheBlockTokens(eachBlock, ctx);
const fallbackFragment = (0, compat_1.getFallbackFromEachBlock)(node);
if (!fallbackFragment) {
return eachBlock;
}
const elseStart = startBlockIndexForElse(fallbackFragment, body, node.key || indexRange || node.context, ctx);
const elseBlock = Object.assign({ type: "SvelteElseBlock", elseif: false, children: [], parent: eachBlock }, ctx.getConvertLocation({
start: elseStart,
end: endIndexFromFragment(fallbackFragment, () => elseStart),
}));
eachBlock.else = elseBlock;
ctx.scriptLet.nestBlock(elseBlock);
elseBlock.children.push(...(0, element_1.convertChildren)({
nodes:
// Adjust for Svelte v5
(0, compat_1.trimChildren)((0, compat_1.getChildren)(fallbackFragment)),
}, elseBlock, ctx));
ctx.scriptLet.closeScope();
extractMustacheBlockTokens(elseBlock, ctx, { startOnly: true });
return eachBlock;
}
/** Convert for AwaitBlock */
function convertAwaitBlock(node, parent, ctx) {
const nodeStart = startBlockIndex(ctx.code, node.start, "#await");
const awaitBlock = Object.assign({ type: "SvelteAwaitBlock", expression: null, kind: "await", pending: null, then: null, catch: null, parent }, ctx.getConvertLocation({ start: nodeStart, end: node.end }));
ctx.scriptLet.addExpression(node.expression, awaitBlock, null, (expression) => {
awaitBlock.expression = expression;
});
const pending = (0, compat_1.getPendingFromAwaitBlock)(node);
if (pending) {
const pendingBlock = Object.assign({ type: "SvelteAwaitPendingBlock", children: [], parent: awaitBlock }, ctx.getConvertLocation({
start: awaitBlock.range[0],
end: endIndexFromBlock(pending, node.expression, ctx),
}));
ctx.scriptLet.nestBlock(pendingBlock);
pendingBlock.children.push(...(0, element_1.convertChildren)(pending, pendingBlock, ctx));
awaitBlock.pending = pendingBlock;
ctx.scriptLet.closeScope();
}
const then = (0, compat_1.getThenFromAwaitBlock)(node);
if (then) {
const awaitThen = !pending;
if (awaitThen) {
awaitBlock.kind = "await-then";
}
const thenStart = awaitBlock.pending
? startBlockIndex(ctx.code, node.value
? (0, common_1.getWithLoc)(node.value).start
: startIndexFromFragment(then, () => {
return awaitBlock.pending.range[1];
}), ":then")
: nodeStart;
const thenBlock = Object.assign({ type: "SvelteAwaitThenBlock", awaitThen, value: null, children: [], parent: awaitBlock }, ctx.getConvertLocation({
start: thenStart,
end: endIndexFromFragment(then, () => {
return (ctx.code.indexOf("}", node.value ? (0, common_1.getWithLoc)(node.value).end : thenStart + 5) + 1);
}),
}));
if (node.value) {
const baseParam = {
node: node.value,
parent: thenBlock,
callback(value) {
thenBlock.value = value;
},
typing: "any",
};
ctx.scriptLet.nestBlock(thenBlock, (typeCtx) => {
if (!typeCtx) {
return {
param: baseParam,
};
}
const expression = ctx.getText(node.expression);
if (node.expression.type === "Literal") {
return {
param: Object.assign(Object.assign({}, baseParam), { typing: expression }),
};
}
const idAwaitThenValue = typeCtx.generateUniqueId("AwaitThenValue");
if (node.expression.type === "Identifier" &&
// We cannot use type annotations like `(x: Foo<x>)` if they have the same identifier name.
!hasIdentifierFor(node.expression.name, baseParam.node)) {
return {
preparationScript: [generateAwaitThenValueType(idAwaitThenValue)],
param: Object.assign(Object.assign({}, baseParam), { typing: `${idAwaitThenValue}<(typeof ${expression})>` }),
};
}
const id = typeCtx.generateUniqueId(expression);
return {
preparationScript: [
{
script: `const ${id} = ${expression};`,
nodeType: "VariableDeclaration",
},
generateAwaitThenValueType(idAwaitThenValue),
],
param: Object.assign(Object.assign({}, baseParam), { typing: `${idAwaitThenValue}<(typeof ${id})>` }),
};
});
}
else {
ctx.scriptLet.nestBlock(thenBlock);
}
thenBlock.children.push(...(0, element_1.convertChildren)(then, thenBlock, ctx));
if (awaitBlock.pending) {
extractMustacheBlockTokens(thenBlock, ctx, { startOnly: true });
}
else {
const thenIndex = ctx.code.indexOf("then", (0, common_1.getWithLoc)(node.expression).end);
ctx.addToken("MustacheKeyword", {
start: thenIndex,
end: thenIndex + 4,
});
}
awaitBlock.then = thenBlock;
ctx.scriptLet.closeScope();
}
const catchFragment = (0, compat_1.getCatchFromAwaitBlock)(node);
if (catchFragment) {
const awaitCatch = !pending && !then;
if (awaitCatch) {
awaitBlock.kind = "await-catch";
}
const catchStart = awaitBlock.then || awaitBlock.pending
? startBlockIndex(ctx.code, node.error
? (0, common_1.getWithLoc)(node.error).start
: startIndexFromFragment(catchFragment, () => {
return (awaitBlock.then || awaitBlock.pending).range[1];
}), ":catch")
: nodeStart;
const catchBlock = Object.assign({ type: "SvelteAwaitCatchBlock", awaitCatch, error: null, children: [], parent: awaitBlock }, ctx.getConvertLocation({
start: catchStart,
end: endIndexFromFragment(catchFragment, () => {
return (ctx.code.indexOf("}", node.error ? (0, common_1.getWithLoc)(node.error).end : catchStart + 6) + 1);
}),
}));
if (node.error) {
ctx.scriptLet.nestBlock(catchBlock, [
{
node: node.error,
parent: catchBlock,
typing: "Error",
callback: (error) => {
catchBlock.error = error;
},
},
]);
}
else {
ctx.scriptLet.nestBlock(catchBlock);
}
catchBlock.children.push(...(0, element_1.convertChildren)(catchFragment, catchBlock, ctx));
if (awaitBlock.pending || awaitBlock.then) {
extractMustacheBlockTokens(catchBlock, ctx, { startOnly: true });
}
else {
const catchIndex = ctx.code.indexOf("catch", (0, common_1.getWithLoc)(node.expression).end);
ctx.addToken("MustacheKeyword", {
start: catchIndex,
end: catchIndex + 5,
});
}
awaitBlock.catch = catchBlock;
ctx.scriptLet.closeScope();
}
extractMustacheBlockTokens(awaitBlock, ctx);
return awaitBlock;
}
/** Convert for KeyBlock */
function convertKeyBlock(node, parent, ctx) {
const nodeStart = startBlockIndex(ctx.code, node.start, "#key");
const keyBlock = Object.assign({ type: "SvelteKeyBlock", expression: null, children: [], parent }, ctx.getConvertLocation({ start: nodeStart, end: node.end }));
ctx.scriptLet.addExpression(node.expression, keyBlock, null, (expression) => {
keyBlock.expression = expression;
});
ctx.scriptLet.nestBlock(keyBlock);
keyBlock.children.push(...(0, element_1.convertChildren)({
nodes:
// Adjust for Svelte v5
(0, compat_1.trimChildren)((0, compat_1.getChildren)((0, compat_1.getFragment)(node))),
}, keyBlock, ctx));
ctx.scriptLet.closeScope();
extractMustacheBlockTokens(keyBlock, ctx);
return keyBlock;
}
/** Convert for SnippetBlock */
function convertSnippetBlock(node, parent, ctx) {
// {#snippet x(args)}...{/snippet}
const nodeStart = startBlockIndex(ctx.code, node.start, "#snippet");
const snippetBlock = Object.assign({ type: "SvelteSnippetBlock", id: null, params: [], children: [], parent }, ctx.getConvertLocation({ start: nodeStart, end: node.end }));
const closeParenIndex = ctx.code.indexOf(")", (0, common_1.getWithLoc)(node.parameters.length > 0
? node.parameters[node.parameters.length - 1]
: node.expression).end);
const scopeKind = parent.type === "Program"
? "snippet"
: // use currentScriptScopeKind
null;
ctx.scriptLet.nestSnippetBlock(node.expression, closeParenIndex, snippetBlock, scopeKind, (id, params) => {
snippetBlock.id = id;
snippetBlock.params = params;
});
snippetBlock.children.push(...(0, element_1.convertChildren)({
nodes:
// Adjust for Svelte v5
(0, compat_1.trimChildren)(node.body.nodes),
}, snippetBlock, ctx));
ctx.scriptLet.closeScope();
extractMustacheBlockTokens(snippetBlock, ctx);
ctx.snippets.push(snippetBlock);
return snippetBlock;
}
/** Extract mustache block tokens */
function extractMustacheBlockTokens(node, ctx, option) {
const startSectionNameStart = (0, common_1.indexOf)(ctx.code, (c) => Boolean(c.trim()), node.range[0] + 1);
const startSectionNameEnd = (0, common_1.indexOf)(ctx.code, (c) => c === "}" || !c.trim(), startSectionNameStart + 1);
ctx.addToken("MustacheKeyword", {
start: startSectionNameStart,
end: startSectionNameEnd,
});
if (option === null || option === void 0 ? void 0 : option.startOnly) {
return;
}
const endSectionNameEnd = (0, common_1.lastIndexOf)(ctx.code, (c) => Boolean(c.trim()), node.range[1] - 2) + 1;
const endSectionNameStart = (0, common_1.lastIndexOf)(ctx.code, (c) => c === "{" || c === "/" || !c.trim(), endSectionNameEnd - 1);
ctx.addToken("MustacheKeyword", {
start: endSectionNameStart,
end: endSectionNameEnd,
});
}
/** Generate Awaited like type code */
function generateAwaitThenValueType(id) {
return {
script: `type ${id}<T> = T extends null | undefined
? T
: T extends { then(value: infer F): any }
? F extends (value: infer V, ...args: any) => any
? ${id}<V>
: never
: T;`,
nodeType: "TSTypeAliasDeclaration",
};
}
/** Checks whether the given name identifier is exists or not. */
function hasIdentifierFor(name, node) {
if (node.type === "Identifier") {
return node.name === name;
}
if (node.type === "ObjectPattern") {
return node.properties.some((property) => property.type === "Property"
? hasIdentifierFor(name, property.value)
: hasIdentifierFor(name, property));
}
if (node.type === "ArrayPattern") {
return node.elements.some((element) => element && hasIdentifierFor(name, element));
}
if (node.type === "RestElement") {
return hasIdentifierFor(name, node.argument);
}
if (node.type === "AssignmentPattern") {
return hasIdentifierFor(name, node.left);
}
return false;
}
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