316 lines
9.8 KiB
JavaScript
316 lines
9.8 KiB
JavaScript
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
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/* global Y */
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'use strict'
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function extend (Y /* :any */) {
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class YMap {
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/* ::
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_model: Id;
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os: Y.AbstractDatabase;
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map: Object;
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contents: any;
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opContents: Object;
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eventHandler: Function;
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*/
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constructor (os, model, contents, opContents) {
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this._model = model.id
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this.os = os
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this.map = Y.utils.copyObject(model.map)
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this.contents = contents
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this.opContents = opContents
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this.eventHandler = new Y.utils.EventHandler(ops => {
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var userEvents = []
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for (var i in ops) {
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var op = ops[i]
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var oldValue
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// key is the name to use to access (op)content
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var key = op.struct === 'Delete' ? op.key : op.parentSub
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// compute oldValue
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if (this.opContents[key] != null) {
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let prevType = this.opContents[key]
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oldValue = () => {// eslint-disable-line
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return new Promise((resolve) => {
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this.os.requestTransaction(function *() {// eslint-disable-line
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var type = yield* this.getType(prevType)
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resolve(type)
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})
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})
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}
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} else {
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oldValue = this.contents[key]
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}
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// compute op event
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if (op.struct === 'Insert') {
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if (op.left === null) {
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if (op.opContent != null) {
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delete this.contents[key]
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if (op.deleted) {
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delete this.opContents[key]
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} else {
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this.opContents[key] = op.opContent
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}
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} else {
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delete this.opContents[key]
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if (op.deleted) {
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delete this.contents[key]
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} else {
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this.contents[key] = op.content
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}
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}
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this.map[key] = op.id
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var insertEvent
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if (oldValue === undefined) {
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insertEvent = {
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name: key,
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object: this,
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type: 'add'
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}
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} else {
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insertEvent = {
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name: key,
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object: this,
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oldValue: oldValue,
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type: 'update'
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}
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}
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userEvents.push(insertEvent)
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}
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} else if (op.struct === 'Delete') {
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if (Y.utils.compareIds(this.map[key], op.target)) {
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delete this.opContents[key]
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delete this.contents[key]
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var deleteEvent = {
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name: key,
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object: this,
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oldValue: oldValue,
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type: 'delete'
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}
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userEvents.push(deleteEvent)
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}
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} else {
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throw new Error('Unexpected Operation!')
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}
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}
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if (userEvents.length > 0) {
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this.eventHandler.callEventListeners(userEvents)
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}
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})
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}
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get (key) {
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// return property.
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// if property does not exist, return null
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// if property is a type, return a promise
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if (key == null) {
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throw new Error('You must specify key!')
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}
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if (this.opContents[key] == null) {
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return this.contents[key]
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} else {
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return new Promise((resolve) => {
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var oid = this.opContents[key]
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this.os.requestTransaction(function *() {
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var type = yield* this.getType(oid)
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resolve(type)
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})
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})
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}
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}
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/*
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If there is a primitive (not a custom type), then return it.
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Returns all primitive values, if propertyName is specified!
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Note: modifying the return value could result in inconsistencies!
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-- so make sure to copy it first!
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*/
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getPrimitive (key) {
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if (key == null) {
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return Y.utils.copyObject(this.contents)
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} else {
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return this.contents[key]
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}
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}
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delete (key) {
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var right = this.map[key]
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if (right != null) {
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var del = {
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target: right,
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struct: 'Delete'
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}
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var eventHandler = this.eventHandler
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var modDel = Y.utils.copyObject(del)
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modDel.key = key
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eventHandler.awaitAndPrematurelyCall([modDel])
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this.os.requestTransaction(function *() {
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yield* this.applyCreatedOperations([del])
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eventHandler.awaitedDeletes(1)
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})
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}
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}
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set (key, value) {
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// set property.
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// if property is a type, return a promise
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// if not, apply immediately on this type an call event
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var right = this.map[key] || null
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var insert /* :any */ = {
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left: null,
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right: right,
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origin: null,
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parent: this._model,
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parentSub: key,
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struct: 'Insert'
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}
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return new Promise((resolve) => {
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if (value instanceof Y.utils.CustomType) {
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// construct a new type
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this.os.requestTransaction(function *() {
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var type = yield* this.createType(value)
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insert.opContent = type._model
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insert.id = this.store.getNextOpId()
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yield* this.applyCreatedOperations([insert])
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resolve(type)
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})
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} else {
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insert.content = value
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insert.id = this.os.getNextOpId()
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var eventHandler = this.eventHandler
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eventHandler.awaitAndPrematurelyCall([insert])
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this.os.requestTransaction(function *() {
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yield* this.applyCreatedOperations([insert])
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eventHandler.awaitedInserts(1)
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})
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resolve(value)
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}
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})
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}
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observe (f) {
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this.eventHandler.addEventListener(f)
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}
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unobserve (f) {
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this.eventHandler.removeEventListener(f)
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}
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/*
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Observe a path.
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E.g.
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```
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o.set('textarea', Y.TextBind)
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o.observePath(['textarea'], function(t){
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// is called whenever textarea is replaced
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t.bind(textarea)
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})
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returns a Promise that contains a function that removes the observer from the path.
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*/
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observePath (path, f) {
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var self = this
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function observeProperty (events) {
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// call f whenever path changes
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for (var i = 0; i < events.length; i++) {
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var event = events[i]
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if (event.name === propertyName) {
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// call this also for delete events!
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var property = self.get(propertyName)
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if (property instanceof Promise) {
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property.then(f)
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} else {
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f(property)
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}
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}
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}
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}
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if (path.length < 1) {
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throw new Error('Path must contain at least one element!')
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} else if (path.length === 1) {
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var propertyName = path[0]
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var property = self.get(propertyName)
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if (property instanceof Promise) {
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property.then(f)
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} else {
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f(property)
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}
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this.observe(observeProperty)
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return Promise.resolve(function () {
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self.unobserve(f)
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})
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} else {
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var deleteChildObservers
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var resetObserverPath = function () {
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var promise = self.get(path[0])
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if (!promise instanceof Promise) {
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// its either not defined or a primitive value
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promise = self.set(path[0], Y.Map)
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}
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return promise.then(function (map) {
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return map.observePath(path.slice(1), f)
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}).then(function (_deleteChildObservers) {
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// update deleteChildObservers
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deleteChildObservers = _deleteChildObservers
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return Promise.resolve() // Promise does not return anything
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})
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}
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var observer = function (events) {
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for (var e in events) {
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var event = events[e]
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if (event.name === path[0]) {
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if (deleteChildObservers != null) {
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deleteChildObservers()
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}
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if (event.type === 'add' || event.type === 'update') {
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resetObserverPath()
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}
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// TODO: what about the delete events?
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}
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}
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}
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self.observe(observer)
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return resetObserverPath().then(
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// this promise contains a function that deletes all the child observers
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// and how to unobserve the observe from this object
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new Promise.resolve(function () { // eslint-disable-line
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if (deleteChildObservers != null) {
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deleteChildObservers()
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}
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self.unobserve(observer)
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})
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)
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}
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}
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* _changed (transaction, op) {
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if (op.struct === 'Delete') {
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var target = yield* transaction.getOperation(op.target)
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op.key = target.parentSub
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}
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this.eventHandler.receivedOp(op)
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}
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}
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Y.extend('Map', new Y.utils.CustomType({
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name: 'Map',
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class: YMap,
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struct: 'Map',
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initType: function * YMapInitializer (os, model) {
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var contents = {}
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var opContents = {}
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var map = model.map
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for (var name in map) {
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var op = yield* this.getOperation(map[name])
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if (op.opContent != null) {
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opContents[name] = op.opContent
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} else {
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contents[name] = op.content
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}
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}
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return new YMap(os, model, contents, opContents)
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}
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}))
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}
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module.exports = extend
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if (typeof Y !== 'undefined') {
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extend(Y)
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}
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},{}]},{},[1])
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