/
DocumentMapper.ts
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/
DocumentMapper.ts
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import {
Position,
Range,
CompletionItem,
Hover,
Diagnostic,
ColorPresentation,
SymbolInformation,
LocationLink,
TextDocumentEdit,
CodeAction,
SelectionRange,
TextEdit,
InsertReplaceEdit
} from 'vscode-languageserver';
import { TagInformation, offsetAt, positionAt, getLineOffsets } from './utils';
import { Logger } from '../../logger';
import { generatedPositionFor, originalPositionFor, TraceMap } from '@jridgewell/trace-mapping';
export interface DocumentMapper {
/**
* Map the generated position to the original position
* @param generatedPosition Position in fragment
*/
getOriginalPosition(generatedPosition: Position): Position;
/**
* Map the original position to the generated position
* @param originalPosition Position in parent
*/
getGeneratedPosition(originalPosition: Position): Position;
/**
* Returns true if the given original position is inside of the generated map
* @param pos Position in original
*/
isInGenerated(pos: Position): boolean;
/**
* Get document URL
*/
getURL(): string;
}
/**
* Does not map, returns positions as is.
*/
export class IdentityMapper implements DocumentMapper {
constructor(private url: string, private parent?: DocumentMapper) {}
getOriginalPosition(generatedPosition: Position): Position {
if (this.parent) {
generatedPosition = this.getOriginalPosition(generatedPosition);
}
return generatedPosition;
}
getGeneratedPosition(originalPosition: Position): Position {
if (this.parent) {
originalPosition = this.getGeneratedPosition(originalPosition);
}
return originalPosition;
}
isInGenerated(position: Position): boolean {
if (this.parent && !this.parent.isInGenerated(position)) {
return false;
}
return true;
}
getURL(): string {
return this.url;
}
}
/**
* Maps positions in a fragment relative to a parent.
*/
export class FragmentMapper implements DocumentMapper {
private lineOffsetsOriginal = getLineOffsets(this.originalText);
private lineOffsetsGenerated = getLineOffsets(this.tagInfo.content);
constructor(
private originalText: string,
private tagInfo: TagInformation,
private url: string
) {}
getOriginalPosition(generatedPosition: Position): Position {
const parentOffset = this.offsetInParent(
offsetAt(generatedPosition, this.tagInfo.content, this.lineOffsetsGenerated)
);
return positionAt(parentOffset, this.originalText, this.lineOffsetsOriginal);
}
private offsetInParent(offset: number): number {
return this.tagInfo.start + offset;
}
getGeneratedPosition(originalPosition: Position): Position {
const fragmentOffset =
offsetAt(originalPosition, this.originalText, this.lineOffsetsOriginal) -
this.tagInfo.start;
return positionAt(fragmentOffset, this.tagInfo.content, this.lineOffsetsGenerated);
}
isInGenerated(pos: Position): boolean {
const offset = offsetAt(pos, this.originalText, this.lineOffsetsOriginal);
return offset >= this.tagInfo.start && offset <= this.tagInfo.end;
}
getURL(): string {
return this.url;
}
}
export class SourceMapDocumentMapper implements DocumentMapper {
constructor(
protected traceMap: TraceMap,
protected sourceUri: string,
private parent?: DocumentMapper
) {}
getOriginalPosition(generatedPosition: Position): Position {
if (this.parent) {
generatedPosition = this.parent.getOriginalPosition(generatedPosition);
}
if (generatedPosition.line < 0) {
return { line: -1, character: -1 };
}
const mapped = originalPositionFor(this.traceMap, {
line: generatedPosition.line + 1,
column: generatedPosition.character
});
if (!mapped) {
return { line: -1, character: -1 };
}
if (mapped.line === 0) {
Logger.log('Got 0 mapped line from', generatedPosition, 'col was', mapped.column);
}
return {
line: (mapped.line || 0) - 1,
character: mapped.column || 0
};
}
getGeneratedPosition(originalPosition: Position): Position {
if (this.parent) {
originalPosition = this.parent.getGeneratedPosition(originalPosition);
}
const mapped = generatedPositionFor(this.traceMap, {
line: originalPosition.line + 1,
column: originalPosition.character,
source: this.sourceUri
});
if (!mapped) {
return { line: -1, character: -1 };
}
const result = {
line: (mapped.line || 0) - 1,
character: mapped.column || 0
};
if (result.line < 0) {
return result;
}
return result;
}
isInGenerated(position: Position): boolean {
if (this.parent && !this.isInGenerated(position)) {
return false;
}
const generated = this.getGeneratedPosition(position);
return generated.line >= 0;
}
getURL(): string {
return this.sourceUri;
}
}
export function mapRangeToOriginal(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
range: Range
): Range {
// DON'T use Range.create here! Positions might not be mapped
// and therefore return negative numbers, which makes Range.create throw.
// These invalid position need to be handled
// on a case-by-case basis in the calling functions.
const originalRange = {
start: fragment.getOriginalPosition(range.start),
end: fragment.getOriginalPosition(range.end)
};
// Range may be mapped one character short - reverse that for "in the same line" cases
if (
originalRange.start.line === originalRange.end.line &&
range.start.line === range.end.line &&
originalRange.end.character - originalRange.start.character ===
range.end.character - range.start.character - 1
) {
originalRange.end.character += 1;
}
return originalRange;
}
export function mapRangeToGenerated(fragment: DocumentMapper, range: Range): Range {
return Range.create(
fragment.getGeneratedPosition(range.start),
fragment.getGeneratedPosition(range.end)
);
}
export function mapCompletionItemToOriginal(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
item: CompletionItem
): CompletionItem {
if (!item.textEdit) {
return item;
}
return {
...item,
textEdit: mapEditToOriginal(fragment, item.textEdit)
};
}
export function mapHoverToParent(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
hover: Hover
): Hover {
if (!hover.range) {
return hover;
}
return { ...hover, range: mapRangeToOriginal(fragment, hover.range) };
}
export function mapObjWithRangeToOriginal<T extends { range: Range }>(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
objWithRange: T
): T {
return { ...objWithRange, range: mapRangeToOriginal(fragment, objWithRange.range) };
}
export function mapInsertReplaceEditToOriginal(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
edit: InsertReplaceEdit
): InsertReplaceEdit {
return {
...edit,
insert: mapRangeToOriginal(fragment, edit.insert),
replace: mapRangeToOriginal(fragment, edit.replace)
};
}
export function mapEditToOriginal(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
edit: TextEdit | InsertReplaceEdit
): TextEdit | InsertReplaceEdit {
return TextEdit.is(edit)
? mapObjWithRangeToOriginal(fragment, edit)
: mapInsertReplaceEditToOriginal(fragment, edit);
}
export function mapDiagnosticToGenerated(
fragment: DocumentMapper,
diagnostic: Diagnostic
): Diagnostic {
return { ...diagnostic, range: mapRangeToGenerated(fragment, diagnostic.range) };
}
export function mapColorPresentationToOriginal(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
presentation: ColorPresentation
): ColorPresentation {
const item = {
...presentation
};
if (item.textEdit) {
item.textEdit = mapObjWithRangeToOriginal(fragment, item.textEdit);
}
if (item.additionalTextEdits) {
item.additionalTextEdits = item.additionalTextEdits.map((edit) =>
mapObjWithRangeToOriginal(fragment, edit)
);
}
return item;
}
export function mapSymbolInformationToOriginal(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
info: SymbolInformation
): SymbolInformation {
return { ...info, location: mapObjWithRangeToOriginal(fragment, info.location) };
}
export function mapLocationLinkToOriginal(
fragment: DocumentMapper,
def: LocationLink
): LocationLink {
return LocationLink.create(
def.targetUri,
fragment.getURL() === def.targetUri
? mapRangeToOriginal(fragment, def.targetRange)
: def.targetRange,
fragment.getURL() === def.targetUri
? mapRangeToOriginal(fragment, def.targetSelectionRange)
: def.targetSelectionRange,
def.originSelectionRange
? mapRangeToOriginal(fragment, def.originSelectionRange)
: undefined
);
}
export function mapTextDocumentEditToOriginal(fragment: DocumentMapper, edit: TextDocumentEdit) {
if (edit.textDocument.uri !== fragment.getURL()) {
return edit;
}
return TextDocumentEdit.create(
edit.textDocument,
edit.edits.map((textEdit) => mapObjWithRangeToOriginal(fragment, textEdit))
);
}
export function mapCodeActionToOriginal(fragment: DocumentMapper, codeAction: CodeAction) {
return CodeAction.create(
codeAction.title,
{
documentChanges: codeAction.edit!.documentChanges!.map((edit) =>
mapTextDocumentEditToOriginal(fragment, edit as TextDocumentEdit)
)
},
codeAction.kind
);
}
export function mapSelectionRangeToParent(
fragment: Pick<DocumentMapper, 'getOriginalPosition'>,
selectionRange: SelectionRange
): SelectionRange {
const { range, parent } = selectionRange;
return SelectionRange.create(
mapRangeToOriginal(fragment, range),
parent && mapSelectionRangeToParent(fragment, parent)
);
}