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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
'use strict';
import { format, isEOL } from './format';
import { parseTree, findNodeAtLocation } from './parser';
export function removeProperty(text, path, options) {
return setProperty(text, path, void 0, options);
}
export function setProperty(text, originalPath, value, options) {
const path = originalPath.slice();
const errors = [];
const root = parseTree(text, errors);
let parent = void 0;
let lastSegment = void 0;
while (path.length > 0) {
lastSegment = path.pop();
parent = findNodeAtLocation(root, path);
if (parent === void 0 && value !== void 0) {
if (typeof lastSegment === 'string') {
value = { [lastSegment]: value };
}
else {
value = [value];
}
}
else {
break;
}
}
if (!parent) {
// empty document
if (value === void 0) { // delete
throw new Error('Can not delete in empty document');
}
return withFormatting(text, { offset: root ? root.offset : 0, length: root ? root.length : 0, content: JSON.stringify(value) }, options);
}
else if (parent.type === 'object' && typeof lastSegment === 'string' && Array.isArray(parent.children)) {
const existing = findNodeAtLocation(parent, [lastSegment]);
if (existing !== void 0) {
if (value === void 0) { // delete
if (!existing.parent) {
throw new Error('Malformed AST');
}
const propertyIndex = parent.children.indexOf(existing.parent);
let removeBegin;
let removeEnd = existing.parent.offset + existing.parent.length;
if (propertyIndex > 0) {
// remove the comma of the previous node
let previous = parent.children[propertyIndex - 1];
removeBegin = previous.offset + previous.length;
}
else {
removeBegin = parent.offset + 1;
if (parent.children.length > 1) {
// remove the comma of the next node
let next = parent.children[1];
removeEnd = next.offset;
}
}
return withFormatting(text, { offset: removeBegin, length: removeEnd - removeBegin, content: '' }, options);
}
else {
// set value of existing property
return withFormatting(text, { offset: existing.offset, length: existing.length, content: JSON.stringify(value) }, options);
}
}
else {
if (value === void 0) { // delete
return []; // property does not exist, nothing to do
}
const newProperty = `${JSON.stringify(lastSegment)}: ${JSON.stringify(value)}`;
const index = options.getInsertionIndex ? options.getInsertionIndex(parent.children.map(p => p.children[0].value)) : parent.children.length;
let edit;
if (index > 0) {
let previous = parent.children[index - 1];
edit = { offset: previous.offset + previous.length, length: 0, content: ',' + newProperty };
}
else if (parent.children.length === 0) {
edit = { offset: parent.offset + 1, length: 0, content: newProperty };
}
else {
edit = { offset: parent.offset + 1, length: 0, content: newProperty + ',' };
}
return withFormatting(text, edit, options);
}
}
else if (parent.type === 'array' && typeof lastSegment === 'number' && Array.isArray(parent.children)) {
const insertIndex = lastSegment;
if (insertIndex === -1) {
// Insert
const newProperty = `${JSON.stringify(value)}`;
let edit;
if (parent.children.length === 0) {
edit = { offset: parent.offset + 1, length: 0, content: newProperty };
}
else {
const previous = parent.children[parent.children.length - 1];
edit = { offset: previous.offset + previous.length, length: 0, content: ',' + newProperty };
}
return withFormatting(text, edit, options);
}
else if (value === void 0 && parent.children.length >= 0) {
// Removal
const removalIndex = lastSegment;
const toRemove = parent.children[removalIndex];
let edit;
if (parent.children.length === 1) {
// only item
edit = { offset: parent.offset + 1, length: parent.length - 2, content: '' };
}
else if (parent.children.length - 1 === removalIndex) {
// last item
let previous = parent.children[removalIndex - 1];
let offset = previous.offset + previous.length;
let parentEndOffset = parent.offset + parent.length;
edit = { offset, length: parentEndOffset - 2 - offset, content: '' };
}
else {
edit = { offset: toRemove.offset, length: parent.children[removalIndex + 1].offset - toRemove.offset, content: '' };
}
return withFormatting(text, edit, options);
}
else if (value !== void 0) {
let edit;
const newProperty = `${JSON.stringify(value)}`;
if (!options.isArrayInsertion && parent.children.length > lastSegment) {
const toModify = parent.children[lastSegment];
edit = { offset: toModify.offset, length: toModify.length, content: newProperty };
}
else if (parent.children.length === 0 || lastSegment === 0) {
edit = { offset: parent.offset + 1, length: 0, content: parent.children.length === 0 ? newProperty : newProperty + ',' };
}
else {
const index = lastSegment > parent.children.length ? parent.children.length : lastSegment;
const previous = parent.children[index - 1];
edit = { offset: previous.offset + previous.length, length: 0, content: ',' + newProperty };
}
return withFormatting(text, edit, options);
}
else {
throw new Error(`Can not ${value === void 0 ? 'remove' : (options.isArrayInsertion ? 'insert' : 'modify')} Array index ${insertIndex} as length is not sufficient`);
}
}
else {
throw new Error(`Can not add ${typeof lastSegment !== 'number' ? 'index' : 'property'} to parent of type ${parent.type}`);
}
}
function withFormatting(text, edit, options) {
if (!options.formattingOptions) {
return [edit];
}
// apply the edit
let newText = applyEdit(text, edit);
// format the new text
let begin = edit.offset;
let end = edit.offset + edit.content.length;
if (edit.length === 0 || edit.content.length === 0) { // insert or remove
while (begin > 0 && !isEOL(newText, begin - 1)) {
begin--;
}
while (end < newText.length && !isEOL(newText, end)) {
end++;
}
}
const edits = format(newText, { offset: begin, length: end - begin }, { ...options.formattingOptions, keepLines: false });
// apply the formatting edits and track the begin and end offsets of the changes
for (let i = edits.length - 1; i >= 0; i--) {
const edit = edits[i];
newText = applyEdit(newText, edit);
begin = Math.min(begin, edit.offset);
end = Math.max(end, edit.offset + edit.length);
end += edit.content.length - edit.length;
}
// create a single edit with all changes
const editLength = text.length - (newText.length - end) - begin;
return [{ offset: begin, length: editLength, content: newText.substring(begin, end) }];
}
export function applyEdit(text, edit) {
return text.substring(0, edit.offset) + edit.content + text.substring(edit.offset + edit.length);
}
export function isWS(text, offset) {
return '\r\n \t'.indexOf(text.charAt(offset)) !== -1;
}