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Copy pathsyntaxTriviaList.ts
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234 lines (177 loc) · 5.9 KB
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///<reference path='references.ts' />
module TypeScript {
export interface ISyntaxTriviaList {
parent?: ISyntaxToken;
isShared(): boolean;
count(): number;
syntaxTriviaAt(index: number): ISyntaxTrivia;
// With of this trivia list.
fullWidth(): number;
// Text for this trivia list.
fullText(): string;
hasComment(): boolean;
hasNewLine(): boolean;
hasSkippedToken(): boolean;
last(): ISyntaxTrivia;
toArray(): ISyntaxTrivia[];
clone(): ISyntaxTriviaList;
}
}
module TypeScript.Syntax {
class EmptyTriviaList implements ISyntaxTriviaList {
public isShared(): boolean {
return true;
}
public count(): number {
return 0;
}
public syntaxTriviaAt(index: number): ISyntaxTrivia {
throw Errors.argumentOutOfRange("index");
}
public last(): ISyntaxTrivia {
throw Errors.argumentOutOfRange("index");
}
public fullWidth(): number {
return 0;
}
public fullText(): string {
return "";
}
public hasComment(): boolean {
return false;
}
public hasNewLine(): boolean {
return false;
}
public hasSkippedToken(): boolean {
return false;
}
public toArray(): ISyntaxTrivia[] {
return [];
}
public clone() {
return this;
}
};
export var emptyTriviaList: ISyntaxTriviaList = new EmptyTriviaList();
function isComment(trivia: ISyntaxTrivia): boolean {
return trivia.kind === SyntaxKind.MultiLineCommentTrivia || trivia.kind === SyntaxKind.SingleLineCommentTrivia;
}
class SingletonSyntaxTriviaList implements ISyntaxTriviaList {
private item: ISyntaxTrivia;
constructor(item: ISyntaxTrivia) {
this.item = item.clone();
this.item.parent = this;
}
public isShared(): boolean {
return false;
}
public count(): number {
return 1;
}
public syntaxTriviaAt(index: number): ISyntaxTrivia {
if (index !== 0) {
throw Errors.argumentOutOfRange("index");
}
return this.item;
}
public last(): ISyntaxTrivia {
return this.item;
}
public fullWidth(): number {
return this.item.fullWidth();
}
public fullText(): string {
return this.item.fullText();
}
public hasComment(): boolean {
return isComment(this.item);
}
public hasNewLine(): boolean {
return this.item.kind === SyntaxKind.NewLineTrivia;
}
public hasSkippedToken(): boolean {
return this.item.kind === SyntaxKind.SkippedTokenTrivia;
}
public toArray(): ISyntaxTrivia[] {
return [this.item];
}
public clone(): ISyntaxTriviaList {
return new SingletonSyntaxTriviaList(this.item.clone());
}
}
class NormalSyntaxTriviaList implements ISyntaxTriviaList {
private trivia: ISyntaxTrivia[];
constructor(trivia: ISyntaxTrivia[]) {
this.trivia = trivia.map(t => {
var cloned = t.clone();
cloned.parent = this;
return cloned;
});
}
public isShared(): boolean {
return false;
}
public count() {
return this.trivia.length;
}
public syntaxTriviaAt(index: number): ISyntaxTrivia {
if (index < 0 || index >= this.trivia.length) {
throw Errors.argumentOutOfRange("index");
}
return this.trivia[index];
}
public last(): ISyntaxTrivia {
return this.trivia[this.trivia.length - 1];
}
public fullWidth(): number {
return ArrayUtilities.sum(this.trivia, t => t.fullWidth());
}
public fullText(): string {
var result: string[] = [];
for (var i = 0, n = this.trivia.length; i < n; i++) {
result.push(this.trivia[i].fullText());
}
return result.join("");
}
public hasComment(): boolean {
for (var i = 0; i < this.trivia.length; i++) {
if (isComment(this.trivia[i])) {
return true;
}
}
return false;
}
public hasNewLine(): boolean {
for (var i = 0; i < this.trivia.length; i++) {
if (this.trivia[i].kind === SyntaxKind.NewLineTrivia) {
return true;
}
}
return false;
}
public hasSkippedToken(): boolean {
for (var i = 0; i < this.trivia.length; i++) {
if (this.trivia[i].kind === SyntaxKind.SkippedTokenTrivia) {
return true;
}
}
return false;
}
public toArray(): ISyntaxTrivia[] {
return this.trivia.slice(0);
}
public clone(): ISyntaxTriviaList {
return new NormalSyntaxTriviaList(this.trivia.map(t => t.clone()));
}
}
export function triviaList(trivia: ISyntaxTrivia[]): ISyntaxTriviaList {
if (!trivia || trivia.length === 0) {
return Syntax.emptyTriviaList;
}
if (trivia.length === 1) {
return new SingletonSyntaxTriviaList(trivia[0]);
}
return new NormalSyntaxTriviaList(trivia);
}
}