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150 lines (142 loc) · 6.78 KB
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import * as ts from "typescript";
import * as lua from "../../LuaAST";
import { TransformationContext } from "../context";
import { unsupportedProperty } from "../utils/diagnostics";
import { createExpressionPlusOne } from "../utils/lua-ast";
import { LuaLibFeature, transformLuaLibFunction } from "../utils/lualib";
import { PropertyCallExpression, transformArguments } from "../visitors/call";
function createStringCall(methodName: string, tsOriginal: ts.Node, ...params: lua.Expression[]): lua.CallExpression {
const stringIdentifier = lua.createIdentifier("string");
return lua.createCallExpression(
lua.createTableIndexExpression(stringIdentifier, lua.createStringLiteral(methodName)),
params,
tsOriginal
);
}
export function transformStringPrototypeCall(
context: TransformationContext,
node: PropertyCallExpression
): lua.Expression | undefined {
const expression = node.expression;
const signature = context.checker.getResolvedSignature(node);
const params = transformArguments(context, node.arguments, signature);
const caller = context.transformExpression(expression.expression);
const expressionName = expression.name.text;
switch (expressionName) {
case "replace":
return transformLuaLibFunction(context, LuaLibFeature.StringReplace, node, caller, ...params);
case "concat":
return transformLuaLibFunction(context, LuaLibFeature.StringConcat, node, caller, ...params);
case "indexOf":
const stringExpression = createStringCall(
"find",
node,
caller,
params[0],
params[1] ? createExpressionPlusOne(params[1]) : lua.createNilLiteral(),
lua.createBooleanLiteral(true)
);
return lua.createBinaryExpression(
lua.createBinaryExpression(stringExpression, lua.createNumericLiteral(0), lua.SyntaxKind.OrOperator),
lua.createNumericLiteral(1),
lua.SyntaxKind.SubtractionOperator,
node
);
case "substr":
if (node.arguments.length === 1) {
const argument = context.transformExpression(node.arguments[0]);
const arg1 = createExpressionPlusOne(argument);
return createStringCall("sub", node, caller, arg1);
} else {
const sumArg = lua.createBinaryExpression(params[0], params[1], lua.SyntaxKind.AdditionOperator);
return createStringCall("sub", node, caller, createExpressionPlusOne(params[0]), sumArg);
}
case "substring":
if (node.arguments.length === 1) {
const arg1 = createExpressionPlusOne(params[0]);
return createStringCall("sub", node, caller, arg1);
} else {
const arg1 = createExpressionPlusOne(params[0]);
const arg2 = params[1];
return createStringCall("sub", node, caller, arg1, arg2);
}
case "slice":
if (node.arguments.length === 0) {
return caller;
} else if (node.arguments.length === 1) {
const arg1 = createExpressionPlusOne(params[0]);
return createStringCall("sub", node, caller, arg1);
} else {
const arg1 = createExpressionPlusOne(params[0]);
const arg2 = params[1];
return createStringCall("sub", node, caller, arg1, arg2);
}
case "toLowerCase":
return createStringCall("lower", node, caller);
case "toUpperCase":
return createStringCall("upper", node, caller);
case "trim":
return transformLuaLibFunction(context, LuaLibFeature.StringTrim, node, caller);
case "trimEnd":
case "trimRight":
return transformLuaLibFunction(context, LuaLibFeature.StringTrimEnd, node, caller);
case "trimStart":
case "trimLeft":
return transformLuaLibFunction(context, LuaLibFeature.StringTrimStart, node, caller);
case "split":
return transformLuaLibFunction(context, LuaLibFeature.StringSplit, node, caller, ...params);
case "charAt":
const firstParamPlusOne = createExpressionPlusOne(params[0]);
return createStringCall("sub", node, caller, firstParamPlusOne, firstParamPlusOne);
case "charCodeAt": {
const firstParamPlusOne = createExpressionPlusOne(params[0]);
return createStringCall("byte", node, caller, firstParamPlusOne);
}
case "startsWith":
return transformLuaLibFunction(context, LuaLibFeature.StringStartsWith, node, caller, ...params);
case "endsWith":
return transformLuaLibFunction(context, LuaLibFeature.StringEndsWith, node, caller, ...params);
case "repeat":
const math = lua.createIdentifier("math");
const floor = lua.createStringLiteral("floor");
const parameter = lua.createCallExpression(lua.createTableIndexExpression(math, floor), [params[0]]);
return createStringCall("rep", node, caller, parameter);
case "padStart":
return transformLuaLibFunction(context, LuaLibFeature.StringPadStart, node, caller, ...params);
case "padEnd":
return transformLuaLibFunction(context, LuaLibFeature.StringPadEnd, node, caller, ...params);
default:
context.diagnostics.push(unsupportedProperty(expression.name, "string", expressionName));
}
}
export function transformStringConstructorCall(
context: TransformationContext,
node: PropertyCallExpression
): lua.Expression | undefined {
const expression = node.expression;
const signature = context.checker.getResolvedSignature(node);
const params = transformArguments(context, node.arguments, signature);
const expressionName = expression.name.text;
switch (expressionName) {
case "fromCharCode":
return lua.createCallExpression(
lua.createTableIndexExpression(lua.createIdentifier("string"), lua.createStringLiteral("char")),
params,
node
);
default:
context.diagnostics.push(unsupportedProperty(expression.name, "String", expressionName));
}
}
export function transformStringProperty(
context: TransformationContext,
node: ts.PropertyAccessExpression
): lua.UnaryExpression | undefined {
switch (node.name.text) {
case "length":
const expression = context.transformExpression(node.expression);
return lua.createUnaryExpression(expression, lua.SyntaxKind.LengthOperator, node);
default:
context.diagnostics.push(unsupportedProperty(node.name, "string", node.name.text));
}
}