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Simplify code in 'rename'

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This commit is contained in:
Andy Hanson 2017-01-24 13:44:36 -08:00
parent ceb5fac343
commit a478bfddd2
1 changed files with 84 additions and 88 deletions
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172
src/services/rename.ts
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@ -1,98 +1,94 @@
/* @internal */
namespace ts.Rename {
export function getRenameInfo(typeChecker: TypeChecker, defaultLibFileName: string, getCanonicalFileName: (fileName: string) => string, sourceFile: SourceFile, position: number): RenameInfo {
const canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
const renameInfo = node && nodeIsEligibleForRename(node)
? getRenameInfoForNode(node, typeChecker, sourceFile, getIsDefinedInLibraryFile(defaultLibFileName, getCanonicalFileName))
: undefined;
return renameInfo || getRenameInfoError(Diagnostics.You_cannot_rename_this_element);
}
if (node) {
if (node.kind === SyntaxKind.Identifier ||
node.kind === SyntaxKind.StringLiteral ||
isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
isThis(node)) {
const symbol = typeChecker.getSymbolAtLocation(node);
// Only allow a symbol to be renamed if it actually has at least one declaration.
if (symbol) {
const declarations = symbol.getDeclarations();
if (declarations && declarations.length > 0) {
// Disallow rename for elements that are defined in the standard TypeScript library.
if (forEach(declarations, isDefinedInLibraryFile)) {
return getRenameInfoError(getLocaleSpecificMessage(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
}
const displayName = stripQuotes(getDeclaredName(typeChecker, symbol, node));
const kind = SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
if (kind) {
return {
canRename: true,
kind,
displayName,
localizedErrorMessage: undefined,
fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
kindModifiers: SymbolDisplay.getSymbolModifiers(symbol),
triggerSpan: createTriggerSpanForNode(node, sourceFile)
};
}
}
}
else if (node.kind === SyntaxKind.StringLiteral) {
const type = getStringLiteralTypeForNode(<StringLiteral>node, typeChecker);
if (type) {
if (isDefinedInLibraryFile(node)) {
return getRenameInfoError(getLocaleSpecificMessage(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
}
else {
const displayName = stripQuotes(type.text);
return {
canRename: true,
kind: ScriptElementKind.variableElement,
displayName,
localizedErrorMessage: undefined,
fullDisplayName: displayName,
kindModifiers: ScriptElementKindModifier.none,
triggerSpan: createTriggerSpanForNode(node, sourceFile)
};
}
}
}
}
function getIsDefinedInLibraryFile(defaultLibFileName: string, getCanonicalFileName: (fileName: string) => string): (declaration: Node) => boolean {
if (!defaultLibFileName) {
return () => false;
}
return getRenameInfoError(getLocaleSpecificMessage(Diagnostics.You_cannot_rename_this_element));
function getRenameInfoError(localizedErrorMessage: string): RenameInfo {
return {
canRename: false,
localizedErrorMessage: localizedErrorMessage,
displayName: undefined,
fullDisplayName: undefined,
kind: undefined,
kindModifiers: undefined,
triggerSpan: undefined
};
}
function isDefinedInLibraryFile(declaration: Node) {
if (defaultLibFileName) {
const sourceFile = declaration.getSourceFile();
const canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile.fileName));
if (canonicalName === canonicalDefaultLibName) {
return true;
}
}
return false;
}
function createTriggerSpanForNode(node: Node, sourceFile: SourceFile) {
let start = node.getStart(sourceFile);
let width = node.getWidth(sourceFile);
if (node.kind === SyntaxKind.StringLiteral) {
// Exclude the quotes
start += 1;
width -= 2;
}
return createTextSpan(start, width);
const canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
return declaration => {
const sourceFile = declaration.getSourceFile();
const canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile.fileName));
return canonicalName === canonicalDefaultLibName;
}
}
function getRenameInfoForNode(node: Node, typeChecker: TypeChecker, sourceFile: SourceFile, isDefinedInLibraryFile: (declaration: Node) => boolean): RenameInfo | undefined {
const symbol = typeChecker.getSymbolAtLocation(node);
// Only allow a symbol to be renamed if it actually has at least one declaration.
if (symbol) {
const declarations = symbol.getDeclarations();
if (declarations && declarations.length > 0) {
// Disallow rename for elements that are defined in the standard TypeScript library.
if (some(declarations, isDefinedInLibraryFile)) {
return getRenameInfoError(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
}
const displayName = stripQuotes(getDeclaredName(typeChecker, symbol, node));
const kind = SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
return kind ? getRenameInfoSuccess(displayName, typeChecker.getFullyQualifiedName(symbol), kind, SymbolDisplay.getSymbolModifiers(symbol), node, sourceFile) : undefined;
}
}
else if (node.kind === SyntaxKind.StringLiteral) {
const type = getStringLiteralTypeForNode(<StringLiteral>node, typeChecker);
if (type) {
if (isDefinedInLibraryFile(node)) {
return getRenameInfoError(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
}
const displayName = stripQuotes(type.text);
return getRenameInfoSuccess(displayName, displayName, ScriptElementKind.variableElement, ScriptElementKindModifier.none, node, sourceFile);
}
}
}
function getRenameInfoSuccess(displayName: string, fullDisplayName: string, kind: string, kindModifiers: string, node: Node, sourceFile: SourceFile): RenameInfo {
return {
canRename: true,
kind,
displayName,
localizedErrorMessage: undefined,
fullDisplayName,
kindModifiers,
triggerSpan: createTriggerSpanForNode(node, sourceFile)
};
}
function getRenameInfoError(diagnostic: DiagnosticMessage): RenameInfo {
return {
canRename: false,
localizedErrorMessage: getLocaleSpecificMessage(diagnostic),
displayName: undefined,
fullDisplayName: undefined,
kind: undefined,
kindModifiers: undefined,
triggerSpan: undefined
};
}
function createTriggerSpanForNode(node: Node, sourceFile: SourceFile) {
let start = node.getStart(sourceFile);
let width = node.getWidth(sourceFile);
if (node.kind === SyntaxKind.StringLiteral) {
// Exclude the quotes
start += 1;
width -= 2;
}
return createTextSpan(start, width);
}
function nodeIsEligibleForRename(node: Node) {
return node.kind === SyntaxKind.Identifier || node.kind === SyntaxKind.StringLiteral ||
isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
isThis(node);
}
}