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fix drawing example. Add drawing hook for y-xml

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This commit is contained in:
Kevin Jahns 2017-12-13 12:49:34 +01:00
parent 02253f9a8d
commit 85492ad2e0
5 changed files with 216 additions and 14 deletions
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2
examples/drawing/index.html
View File

@ -13,7 +13,7 @@
<button type="button" id="clearDrawingCanvas">Clear Drawing</button>
<svg id="drawingCanvas" viewbox="0 0 100 100" width="100%"></svg>
<script src="../yjs-dist.js"></script>
<script src="./canvasjs.min.js"></script>
<script src="../bower_components/d3/d3.min.js"></script>
<script src="./index.js"></script>
</body>
</html>

21
examples/drawing/index.js
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@ -10,11 +10,11 @@ let y = new Y({
})
window.yDrawing = y
var drawing = y.share.drawing
var drawing = y.define('drawing', Y.Array)
var renderPath = d3.svg.line()
.x(function (d) { return d[0] })
.y(function (d) { return d[1] })
.interpolate('basis')
.interpolate('basic')
var svg = d3.select('#drawingCanvas')
.call(d3.behavior.drag()
@ -33,14 +33,13 @@ function drawLine (yarray) {
})
}
// call drawLine every time an array is appended
y.share.drawing.observe(function (event) {
event.changedKeys.forEach(function (key) {
let path = y.share.drawing.get(key)
if (path === undefined) {
svg.selectAll('path').remove()
} else {
drawLine(path)
}
drawing.observe(function (event) {
event.removedElements.forEach(function () {
// if one is deleted, all will be deleted!!
svg.selectAll('path').remove()
})
event.addedElements.forEach(function (path) {
drawLine(path)
})
})
// draw all existing content
@ -65,7 +64,7 @@ function drag () {
if (sharedLine != null && ignoreDrag == null) {
ignoreDrag = window.setTimeout(function () {
ignoreDrag = null
}, 33)
}, 10)
sharedLine.push([d3.mouse(this)])
}
}

35
examples/html-editor-drawing-hook/index.html Normal file
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@ -0,0 +1,35 @@
<!DOCTYPE html>
<html>
</head>
<script src="../yjs-dist.js"></script>
<script src="../bower_components/d3/d3.min.js"></script>
<script src="./index.js"></script>
<style>
magic-drawing .drawingCanvas path {
fill: none;
stroke: blue;
stroke-width: 2px;
stroke-linejoin: round;
stroke-linecap: round;
}
magic-drawing .drawingCanvas {
width: 500px;
height: 500px;
cursor: default;
padding:1px;
border:1px solid #021a40;
}
magic-drawing .clearDrawingButton {
position: absolute;
top: 0;
left: 0;
}
magic-drawing {
position: relative;
display: block;
}
</style>
</head>
<body contenteditable="true">
</body>
</html>

134
examples/html-editor-drawing-hook/index.js Normal file
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@ -0,0 +1,134 @@
/* global Y, d3 */
window.onload = function () {
window.yXmlType.bindToDom(document.body)
}
window.addMagicDrawing = function addMagicDrawing () {
let mt = document.createElement('magic-drawing')
mt.dataset.yjsHook = 'magic-drawing'
document.body.append(mt)
}
var renderPath = d3.svg.line()
.x(function (d) { return d[0] })
.y(function (d) { return d[1] })
.interpolate('basic')
function initDrawingBindings (type, dom) {
dom.contentEditable = 'false'
dom.dataset.yjsHook = 'magic-drawing'
var drawing = type.get('drawing')
if (drawing === undefined) {
drawing = type.set('drawing', new Y.Array())
}
var canvas = dom.querySelector('.drawingCanvas')
if (canvas == null) {
canvas = document.createElementNS('http://www.w3.org/2000/svg', 'svg')
canvas.setAttribute('class', 'drawingCanvas')
canvas.setAttribute('viewbox', '0 0 100 100')
dom.insertBefore(canvas, null)
}
var clearDrawingButton = dom.querySelector('.clearDrawingButton')
if (clearDrawingButton == null) {
clearDrawingButton = document.createElement('button')
clearDrawingButton.setAttribute('type', 'button')
clearDrawingButton.setAttribute('class', 'clearDrawingButton')
clearDrawingButton.innerText = 'Clear Drawing'
dom.insertBefore(clearDrawingButton, null)
}
var svg = d3.select(canvas)
.call(d3.behavior.drag()
.on('dragstart', dragstart)
.on('drag', drag)
.on('dragend', dragend))
// create line from a shared array object and update the line when the array changes
function drawLine (yarray, svg) {
var line = svg.append('path').datum(yarray.toArray())
line.attr('d', renderPath)
yarray.observe(function (event) {
line.remove()
line = svg.append('path').datum(yarray.toArray())
line.attr('d', renderPath)
})
}
// call drawLine every time an array is appended
drawing.observe(function (event) {
event.removedElements.forEach(function () {
// if one is deleted, all will be deleted!!
svg.selectAll('path').remove()
})
event.addedElements.forEach(function (path) {
drawLine(path, svg)
})
})
// draw all existing content
for (var i = 0; i < drawing.length; i++) {
drawLine(drawing.get(i), svg)
}
// clear canvas on request
clearDrawingButton.onclick = function () {
drawing.delete(0, drawing.length)
}
var sharedLine = null
function dragstart () {
drawing.insert(drawing.length, [Y.Array])
sharedLine = drawing.get(drawing.length - 1)
}
// After one dragged event is recognized, we ignore them for 33ms.
var ignoreDrag = null
function drag () {
if (sharedLine != null && ignoreDrag == null) {
ignoreDrag = window.setTimeout(function () {
ignoreDrag = null
}, 10)
sharedLine.push([d3.mouse(this)])
}
}
function dragend () {
sharedLine = null
window.clearTimeout(ignoreDrag)
ignoreDrag = null
}
}
Y.XmlHook.addHook('magic-drawing', {
fillType: function (dom, type) {
initDrawingBindings(type, dom)
},
createDom: function (type) {
const dom = document.createElement('magic-drawing')
initDrawingBindings(type, dom)
return dom
}
})
// initialize a shared object. This function call returns a promise!
let y = new Y({
connector: {
name: 'websockets-client',
url: 'http://127.0.0.1:1234',
room: 'html-editor-example6'
// maxBufferLength: 100
}
})
window.yXml = y
window.yXmlType = y.define('xml', Y.XmlFragment)
window.undoManager = new Y.utils.UndoManager(window.yXmlType, {
captureTimeout: 500
})
document.onkeydown = function interceptUndoRedo (e) {
if (e.keyCode === 90 && e.metaKey) {
if (!e.shiftKey) {
window.undoManager.undo()
} else {
window.undoManager.redo()
}
e.preventDefault()
}
}

38
src/Type/YArray.js
View File

@ -5,15 +5,38 @@ import { logID } from '../MessageHandler/messageToString.js'
import YEvent from '../Util/YEvent.js'
class YArrayEvent extends YEvent {
constructor (yarray, remote) {
constructor (yarray, remote, transaction) {
super(yarray)
this.remote = remote
this._transaction = transaction
}
get addedElements () {
const target = this.target
const transaction = this._transaction
const addedElements = new Set()
transaction.newTypes.forEach(function (type) {
if (type._parent === target && !transaction.deletedStructs.has(type)) {
addedElements.add(type)
}
})
return addedElements
}
get removedElements () {
const target = this.target
const transaction = this._transaction
const removedElements = new Set()
transaction.deletedStructs.forEach(function (struct) {
if (struct._parent === target && !transaction.newTypes.has(struct)) {
removedElements.add(struct)
}
})
return removedElements
}
}
export default class YArray extends Type {
_callObserver (transaction, parentSubs, remote) {
this._callEventHandler(transaction, new YArrayEvent(this, remote))
this._callEventHandler(transaction, new YArrayEvent(this, remote, transaction))
}
get (pos) {
let n = this._start
@ -214,6 +237,17 @@ export default class YArray extends Type {
}
this.insertAfter(left, content)
}
push (content) {
let n = this._start
let lastUndeleted = null
while (n !== null) {
if (!n._deleted) {
lastUndeleted = n
}
n = n._right
}
this.insertAfter(lastUndeleted, content)
}
_logString () {
const left = this._left !== null ? this._left._lastId : null
const origin = this._origin !== null ? this._origin._lastId : null