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// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import {FocusEvent, SelectionEvent} from '../events.mjs';
import {DOM, typeToColor, V8CustomElement} from '../helper.mjs';
DOM.defineCustomElement('./map-panel/map-transitions',
(templateText) =>
class MapTransitions extends V8CustomElement {
_map;
_selectedMapLogEntries;
_displayedMapsInTree;
constructor() {
super(templateText);
this.transitionView.addEventListener(
'mousemove', (e) => this.handleTransitionViewChange(e));
this.currentNode = this.transitionView;
this.currentMap = undefined;
}
get transitionView() {
return this.$('#transitionView');
}
get tooltip() {
return this.$('#tooltip');
}
get tooltipContents() {
return this.$('#tooltipContents');
}
set map(value) {
this._map = value;
this.showMap();
}
handleTransitionViewChange(e) {
this.tooltip.style.left = e.pageX + 'px';
this.tooltip.style.top = e.pageY + 'px';
const map = e.target.map;
if (map) {
this.tooltipContents.innerText = map.description;
}
}
_selectMap(map) {
this.dispatchEvent(new SelectionEvent([map]));
}
showMap() {
if (this.currentMap === this._map) return;
this.currentMap = this._map;
this.selectedMapLogEntries = [this._map];
this.update();
}
_update() {
this.transitionView.style.display = 'none';
DOM.removeAllChildren(this.transitionView);
this._displayedMapsInTree = new Set();
// Limit view to 200 maps for performance reasons.
this.selectedMapLogEntries.slice(0, 200).forEach(
(map) => this.addMapAndParentTransitions(map));
this._displayedMapsInTree = undefined;
this.transitionView.style.display = '';
}
set selectedMapLogEntries(list) {
this._selectedMapLogEntries = list;
this.update();
}
get selectedMapLogEntries() {
return this._selectedMapLogEntries;
}
addMapAndParentTransitions(map) {
if (map === void 0) return;
if (this._displayedMapsInTree.has(map)) return;
this._displayedMapsInTree.add(map);
this.currentNode = this.transitionView;
let parents = map.getParents();
if (parents.length > 0) {
this.addTransitionTo(parents.pop());
parents.reverse().forEach((each) => this.addTransitionTo(each));
}
let mapNode = this.addSubtransitions(map);
// Mark and show the selected map.
mapNode.classList.add('selected');
if (this.selectedMap == map) {
setTimeout(
() => mapNode.scrollIntoView({
behavior: 'smooth',
block: 'nearest',
inline: 'nearest',
}),
1);
}
}
addSubtransitions(map) {
let mapNode = this.addTransitionTo(map);
// Draw outgoing linear transition line.
let current = map;
while (current.children.length == 1) {
current = current.children[0].to;
this.addTransitionTo(current);
}
return mapNode;
}
addTransitionEdge(map) {
let classes = ['transitionEdge'];
let edge = DOM.div(classes);
edge.style.backgroundColor = typeToColor(map.edge);
let labelNode = DOM.div('transitionLabel');
labelNode.innerText = map.edge.toString();
edge.appendChild(labelNode);
return edge;
}
addTransitionTo(map) {
// transition[ transitions[ transition[...], transition[...], ...]];
this._displayedMapsInTree?.add(map);
let transition = DOM.div('transition');
if (map.isDeprecated()) transition.classList.add('deprecated');
if (map.edge) {
transition.appendChild(this.addTransitionEdge(map));
}
let mapNode = this.addMapNode(map);
transition.appendChild(mapNode);
let subtree = DOM.div('transitions');
transition.appendChild(subtree);
this.currentNode.appendChild(transition);
this.currentNode = subtree;
return mapNode;
}
addMapNode(map) {
let node = DOM.div('map');
if (map.edge) node.style.backgroundColor = typeToColor(map.edge);
node.map = map;
node.addEventListener('click', () => this._selectMap(map));
if (map.children.length > 1) {
node.innerText = map.children.length;
let showSubtree = DOM.div('showSubtransitions');
showSubtree.addEventListener('click', (e) => this.toggleSubtree(e, node));
node.appendChild(showSubtree);
} else if (map.children.length == 0) {
node.innerHTML = '●';
}
this.currentNode.appendChild(node);
return node;
}
toggleSubtree(event, node) {
let map = node.map;
event.target.classList.toggle('opened');
let transitionsNode = node.parentElement.querySelector('.transitions');
let subtransitionNodes = transitionsNode.children;
if (subtransitionNodes.length <= 1) {
// Add subtransitions excepth the one that's already shown.
let visibleTransitionMap = subtransitionNodes.length == 1 ?
transitionsNode.querySelector('.map').map :
void 0;
map.children.forEach((edge) => {
if (edge.to != visibleTransitionMap) {
this.currentNode = transitionsNode;
this.addSubtransitions(edge.to);
}
});
} else {
// remove all but the first (currently selected) subtransition
for (let i = subtransitionNodes.length - 1; i > 0; i--) {
transitionsNode.removeChild(subtransitionNodes[i]);
}
}
}
});
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