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import h from '../Util/DomUtil.js';
class Layer {
constructor(id, name) {
this.id = id;
this.name = name;
this.subLayers = [];
this.visible = true;
}
}
class LayerData {
constructor() {
this.layers = [];
this.idPool = 0;
}
_getNewId() {
const id = this.idPool;
this.idPool += 1;
return `layer${id}`;
}
_getContainerAndId(idChain) {
if (idChain.length === 0)
return [ this.layers, null ];
let container = this.layers;
while (idChain.length > 1) {
const id = idChain.pop();
console.log(container, id);
container = container.find(layer => layer.id === id).subLayers;
console.log(idChain);
}
return [ container, idChain[0] ];
}
_idToIndex(container, id) {
return container.findIndex(layer => layer.id === id);
}
insertLayer(idChain) {
const layerId = this._getNewId();
const newLayer = new Layer(layerId, `Layer ${layerId}`);
const [ container, id ] = this._getContainerAndId(idChain);
if (id === null) {
container.push(newLayer);
return;
}
const index = this._idToIndex(container, id);
container.splice(index+1, 0, newLayer);
}
removeLayer(idChain) {
const [ container, id ] = this._getContainerAndId(idChain);
if (id === null) return;
const index = this._idToIndex(container, id);
container.splice(index, 1);
}
pushLayer(idChain) {
const [ container, id ] = this._getContainerAndId(idChain);
if (id === null) return; // nothing to do
const index = this._idToIndex(container, id);
const after = container[index+1];
if (!after) return; // no successor to push to, do nothing
after.subLayers.push(container[index]);
container.splice(index, 1);
}
}
class LayerView {
constructor(parentId) {
const parentElement = document.getElementById(parentId);
const button = (label, f) => {
const b = h('button', label, { 'style': 'margin: 0 5px' });
b.onclick = f;
return b;
}
this.layersList = h('ul');
const root = h('fieldset', { 'class': 'layer-view' }, [
h('legend', 'Layers'),
this.layersList,
button('Move Up', () => this.onMoveUp(this._getIdChain())),
button('Move Down', () => this.onMoveDown(this._getIdChain())),
button('Toggle Visible', () => this.onShowHideLayer(this._getIdChain())),
button('Rename', () => this.onRenameLayer(this._getIdChain())),
h('br'), h('br'),
button('Add Layer', () => this.onAddLayer(this._getIdChain())),
button('Remove Layer', () => this.onRemoveLayer(this._getIdChain())),
button('Push', () => this.onPushLayer(this._getIdChain())),
button('Pop', () => this.onPopLayer(this._getIdChain())),
]);
parentElement.appendChild(root);
this.selectedId = null;
this.onAddLayer = () => {};
this.onRemoveLayer = () => {};
this.onPushLayer = () => {};
this.onPopLayer = () => {};
this.onMoveUp = () => {};
this.onMoveDown = () => {};
this.onShowHideLayer = () => {};
this.onRenameLayer = () => {};
}
_getIdChain() {
const chain = [];
let el = this.selected;
if (el === null || el === undefined) return [];
while (el !== this.layersList && el !== null) {
if (el.nodeName.toLowerCase() === 'li')
chain.push(el.id);
el = el.parentNode;
}
return chain;
}
renderLayers(layers, root=this.layersList) {
let selectedId = '';
if (this.selected) selectedId = this.selected.id;
if (root === this.layersList) this.layersList.replaceChildren();
for (let layer of layers) {
let classList = '';
if (layer.visible) classList += 'visible ';
const el = h(
'li',
layer.name,
{
id: layer.id,
'class': classList,
}
);
if (selectedId === layer.id) {
el.classList.add('selected');
this.selected = el;
}
el.onclick = e => {
e.stopPropagation();
if (this.selected) this.selected.classList.remove('selected');
this.selected = el;
el.classList.add('selected');
};
if (layer.subLayers.length !== 0) {
const ul = h('ul');
this.renderLayers(layer.subLayers, ul);
el.appendChild(ul);
}
root.prepend(el);
}
}
}
class LayerController {
constructor(data, view) {
this.data = data;
this.view = view;
const respond = f => ( idChain => { f(idChain); this.updateView(); } );
this.view.onAddLayer = idChain => { this.data.insertLayer(idChain); this.updateView(); };
this.view.onPushLayer = idChain => { this.data.pushLayer(idChain); this.updateView(); };
this.view.onRemoveLayer = idChain => { this.data.removeLayer(idChain); this.updateView(); }
}
updateView() {
this.view.renderLayers(this.data.layers);
}
}
export { LayerData, LayerView, LayerController };
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