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<h1 class="page-title">Source: panels/LayersPanel.js</h1>
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<pre class="prettyprint source linenums"><code>import SvgCanvas from '@svgedit/svgcanvas'
import LayersPanelHtml from './LayersPanel.html'
const { $id, $click } = SvgCanvas
/**
*
*/
class LayersPanel {
/**
* @param {PlainObject} editor
*/
constructor (editor) {
this.updateContextPanel = editor.topPanel.updateContextPanel.bind(editor.topPanel)
this.editor = editor
}
/**
* @param {PlainObject} e event
* @returns {void}
*/
lmenuFunc (e) {
const action = e?.detail?.trigger
switch (action) {
case 'dupe':
this.cloneLayer()
break
case 'delete':
this.deleteLayer()
break
case 'merge_down':
this.mergeLayer()
break
case 'merge_all':
this.editor.svgCanvas.mergeAllLayers()
this.updateContextPanel()
this.populateLayers()
break
}
}
/**
* @returns {void}
*/
init () {
const template = document.createElement('template')
const { i18next } = this.editor
template.innerHTML = LayersPanelHtml
this.editor.$svgEditor.append(template.content.cloneNode(true))
// layer menu added to DOM
const menuMore = document.createElement('se-cmenu-layers')
menuMore.setAttribute('id', 'se-cmenu-layers-more')
menuMore.value = 'layer_moreopts'
menuMore.setAttribute('leftclick', true)
this.editor.$container.append(menuMore)
menuMore.init(i18next)
const menuLayerBox = document.createElement('se-cmenu-layers')
menuLayerBox.setAttribute('id', 'se-cmenu-layers-list')
menuLayerBox.value = 'layerlist'
menuLayerBox.setAttribute('leftclick', false)
this.editor.$container.append(menuLayerBox)
menuLayerBox.init(i18next)
$click($id('layer_new'), this.newLayer.bind(this))
$click($id('layer_delete'), this.deleteLayer.bind(this))
$click($id('layer_up'), () => this.moveLayer.bind(this)(-1))
$click($id('layer_down'), () => this.moveLayer.bind(this)(1))
$click($id('layer_rename'), this.layerRename.bind(this))
$id('se-cmenu-layers-more').addEventListener('change', this.lmenuFunc.bind(this))
$id('se-cmenu-layers-list').addEventListener('change', (e) => { this.lmenuFunc(e) })
$click($id('sidepanel_handle'), () => this.toggleSidePanel())
this.toggleSidePanel(this.editor.configObj.curConfig.showlayers)
}
toggleSidePanel (displayFlag) {
if (displayFlag === undefined) {
this.editor.$svgEditor.classList.toggle('open')
} else if (displayFlag) {
this.editor.$svgEditor.classList.add('open')
} else {
this.editor.$svgEditor.classList.remove('open')
}
}
/**
* @returns {void}
*/
newLayer () {
let uniqName
let i = this.editor.svgCanvas.getCurrentDrawing().getNumLayers()
do {
uniqName = this.editor.i18next.t('layers.layer') + ' ' + ++i
} while (this.editor.svgCanvas.getCurrentDrawing().hasLayer(uniqName))
const newName = prompt(
this.editor.i18next.t('notification.enterUniqueLayerName'),
uniqName
)
if (!newName) {
return
}
if (this.editor.svgCanvas.getCurrentDrawing().hasLayer(newName)) {
alert(this.editor.i18next.t('notification.dupeLayerName'))
return
}
this.editor.svgCanvas.createLayer(newName)
this.updateContextPanel()
this.populateLayers()
}
/**
*
* @returns {void}
*/
deleteLayer () {
if (this.editor.svgCanvas.deleteCurrentLayer()) {
this.updateContextPanel()
this.populateLayers()
// This matches what this.editor.svgCanvas does
// TODO: make this behavior less brittle (svg-editor should get which
// layer is selected from the canvas and then select that one in the UI)
const elements = document.querySelectorAll('#layerlist tr.layer')
Array.prototype.forEach.call(elements, function (el) {
el.classList.remove('layersel')
})
document.querySelector('#layerlist tr.layer').classList.add('layersel')
}
}
/**
*
* @returns {void}
*/
cloneLayer () {
const name =
this.editor.svgCanvas.getCurrentDrawing().getCurrentLayerName() + ' copy'
const newName = prompt(
this.editor.i18next.t('notification.enterUniqueLayerName'),
name
)
if (!newName) {
return
}
if (this.editor.svgCanvas.getCurrentDrawing().hasLayer(newName)) {
alert(this.editor.i18next.t('notification.dupeLayerName'))
return
}
this.editor.svgCanvas.cloneLayer(newName)
this.updateContextPanel()
this.populateLayers()
}
index (el) {
if (!el) return -1
return Array.from(document.querySelector('#layerlist tbody').children).indexOf(el)
}
/**
*
* @returns {void}
*/
mergeLayer () {
if (
(this.index(document.querySelector('#layerlist tr.layersel')) - 1) ===
this.editor.svgCanvas.getCurrentDrawing().getNumLayers() - 1
) {
return
}
this.editor.svgCanvas.mergeLayer()
this.updateContextPanel()
this.populateLayers()
}
/**
* @param {Integer} pos
* @returns {void}
*/
moveLayer (pos) {
const curPos = this.editor.svgCanvas.indexCurrentLayer()
if (curPos !== -1) {
this.editor.svgCanvas.setCurrentLayerPosition(curPos - pos)
this.populateLayers()
}
}
/**
* @returns {void}
*/
layerRename () {
const ele = document.querySelector('#layerlist tr.layersel td.layername')
const oldName = (ele) ? ele.textContent : ''
const newName = prompt(this.editor.i18next.t('notification.enterNewLayerName'), '')
if (!newName) {
return
}
if (
oldName === newName ||
this.editor.svgCanvas.getCurrentDrawing().hasLayer(newName)
) {
alert(this.editor.i18next.t('notification.layerHasThatName'))
return
}
this.editor.svgCanvas.renameCurrentLayer(newName)
this.populateLayers()
}
/**
* This function highlights the layer passed in (by fading out the other layers).
* If no layer is passed in, this function restores the other layers.
* @param {string} [layerNameToHighlight]
* @returns {void}
*/
toggleHighlightLayer (layerNameToHighlight) {
let i
const curNames = []
const numLayers = this.editor.svgCanvas.getCurrentDrawing().getNumLayers()
for (i = 0; i < numLayers; i++) {
curNames[i] = this.editor.svgCanvas.getCurrentDrawing().getLayerName(i)
}
if (layerNameToHighlight) {
curNames.forEach((curName) => {
if (curName !== layerNameToHighlight) {
this.editor.svgCanvas
.getCurrentDrawing()
.setLayerOpacity(curName, 0.5)
}
})
} else {
curNames.forEach((curName) => {
this.editor.svgCanvas.getCurrentDrawing().setLayerOpacity(curName, 1.0)
})
}
}
/**
* @returns {void}
*/
populateLayers () {
this.editor.svgCanvas.clearSelection()
const self = this
const layerlist = $id('layerlist').querySelector('tbody')
while (layerlist.firstChild) { layerlist.removeChild(layerlist.firstChild) }
$id('selLayerNames').setAttribute('options', '')
const drawing = this.editor.svgCanvas.getCurrentDrawing()
const currentLayerName = drawing.getCurrentLayerName()
let layer = this.editor.svgCanvas.getCurrentDrawing().getNumLayers()
// we get the layers in the reverse z-order (the layer rendered on top is listed first)
let values = ''
let text = ''
while (layer--) {
const name = drawing.getLayerName(layer)
const layerTr = document.createElement('tr')
layerTr.className = (name === currentLayerName) ? 'layer layersel' : 'layer'
const layerVis = document.createElement('td')
layerVis.className = (!drawing.getLayerVisibility(name)) ? 'layerinvis layervis' : 'layervis'
// fix the eye icon lost at right layers
const _eye = document.createElement('img')
_eye.src = './images/eye.svg'
_eye.style.width = '14px'
_eye.style.width = '14px'
layerVis.appendChild(_eye)
const layerName = document.createElement('td')
layerName.className = 'layername'
layerName.textContent = name
layerTr.appendChild(layerVis)
layerTr.appendChild(layerName)
layerlist.appendChild(layerTr)
values = (values) ? values + '::' + name : name
text = (text) ? text + ',' + name : name
}
$id('selLayerNames').setAttribute('options', text)
$id('selLayerNames').setAttribute('values', values)
// handle selection of layer
const nelements = $id('layerlist').querySelectorAll('td.layername')
Array.from(nelements).forEach(function (element) {
element.addEventListener('mouseup', function (evt) {
const trElements = $id('layerlist').querySelectorAll('tr.layer')
Array.from(trElements).forEach(function (element) {
element.classList.remove('layersel')
})
evt.currentTarget.parentNode.classList.add('layersel')
self.editor.svgCanvas.setCurrentLayer(evt.currentTarget.textContent)
// run extension when different layer is selected from listener
self.editor.svgCanvas.runExtensions(
'layersChanged'
)
evt.preventDefault()
})
element.addEventListener('mouseup', (evt) => {
self.toggleHighlightLayer(evt.currentTarget.textContent)
})
element.addEventListener('mouseout', (_evt) => {
self.toggleHighlightLayer()
})
})
const elements = $id('layerlist').querySelectorAll('td.layervis')
Array.from(elements).forEach(function (element) {
$click(element, function (evt) {
const ele = evt.currentTarget.parentNode.querySelector('td.layername')
const name = (ele) ? ele.textContent : ''
const vis = evt.currentTarget.classList.contains('layerinvis')
self.editor.svgCanvas.setLayerVisibility(name, vis)
evt.currentTarget.classList.toggle('layerinvis')
// run extension if layer visibility is changed from listener
self.editor.svgCanvas.runExtensions(
'layerVisChanged'
)
})
})
// if there were too few rows, let's add a few to make it not so lonely
let num = 5 - $id('layerlist').querySelectorAll('tr.layer').length
while (num-- > 0) {
// TODO: there must a better way to do this
const tlayer = document.createElement('tr')
tlayer.innerHTML = '<td style="color:white">_</td><td/>'
layerlist.append(tlayer)
}
// run extension when layer panel is populated
self.editor.svgCanvas.runExtensions(
'layersChanged'
)
}
}
export default LayersPanel
</code></pre>
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