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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 {delay, DOM, formatBytes, V8CustomElement} from './helper.mjs';
import {IcLogEntry} from './log/ic.mjs';
import {MapLogEntry} from './log/map.mjs';
DOM.defineCustomElement('source-panel',
(templateText) =>
class SourcePanel extends V8CustomElement {
_selectedSourcePositions = [];
_sourcePositionsToMarkNodes;
_scripts = [];
_script;
constructor() {
super(templateText);
this.scriptDropdown.addEventListener(
'change', e => this._handleSelectScript(e));
}
get script() {
return this.$('#script');
}
get scriptNode() {
return this.$('.scriptNode');
}
set script(script) {
if (this._script === script) return;
this._script = script;
this._renderSourcePanel();
this._updateScriptDropdownSelection();
}
set selectedSourcePositions(sourcePositions) {
this._selectedSourcePositions = sourcePositions;
// TODO: highlight multiple scripts
this.script = sourcePositions[0]?.script;
this._focusSelectedMarkers();
}
set data(scripts) {
this._scripts = scripts;
this._initializeScriptDropdown();
}
get scriptDropdown() {
return this.$('#script-dropdown');
}
_initializeScriptDropdown() {
this._scripts.sort((a, b) => a.name.localeCompare(b.name));
let select = this.scriptDropdown;
select.options.length = 0;
for (const script of this._scripts) {
const option = document.createElement('option');
const size = formatBytes(script.source.length);
option.text = `${script.name} (id=${script.id} size=${size})`;
option.script = script;
select.add(option);
}
}
_updateScriptDropdownSelection() {
this.scriptDropdown.selectedIndex =
this._script ? this._scripts.indexOf(this._script) : -1;
}
async _renderSourcePanel() {
let scriptNode;
if (this._script) {
await delay(1);
const builder =
new LineBuilder(this, this._script, this._selectedSourcePositions);
scriptNode = builder.createScriptNode();
this._sourcePositionsToMarkNodes = builder.sourcePositionToMarkers;
} else {
scriptNode = document.createElement('pre');
this._selectedMarkNodes = undefined;
}
const oldScriptNode = this.script.childNodes[1];
this.script.replaceChild(scriptNode, oldScriptNode);
}
async _focusSelectedMarkers() {
await delay(100);
// Remove all marked nodes.
for (let markNode of this._sourcePositionsToMarkNodes.values()) {
markNode.className = '';
}
for (let sourcePosition of this._selectedSourcePositions) {
this._sourcePositionsToMarkNodes.get(sourcePosition).className = 'marked';
}
const sourcePosition = this._selectedSourcePositions[0];
if (!sourcePosition) return;
const markNode = this._sourcePositionsToMarkNodes.get(sourcePosition);
markNode.scrollIntoView(
{behavior: 'smooth', block: 'nearest', inline: 'center'});
}
_handleSelectScript(e) {
const option =
this.scriptDropdown.options[this.scriptDropdown.selectedIndex];
this.script = option.script;
this.selectLogEntries(this._script.entries());
}
handleSourcePositionClick(e) {
this.selectLogEntries(e.target.sourcePosition.entries)
}
selectLogEntries(logEntries) {
let icLogEntries = [];
let mapLogEntries = [];
for (const entry of logEntries) {
if (entry instanceof MapLogEntry) {
mapLogEntries.push(entry);
} else if (entry instanceof IcLogEntry) {
icLogEntries.push(entry);
}
}
if (icLogEntries.length > 0) {
this.dispatchEvent(new SelectionEvent(icLogEntries));
}
if (mapLogEntries.length > 0) {
this.dispatchEvent(new SelectionEvent(mapLogEntries));
}
}
});
class SourcePositionIterator {
_entries;
_index = 0;
constructor(sourcePositions) {
this._entries = sourcePositions;
}
* forLine(lineIndex) {
this._findStart(lineIndex);
while (!this._done() && this._current().line === lineIndex) {
yield this._current();
this._next();
}
}
_findStart(lineIndex) {
while (!this._done() && this._current().line < lineIndex) {
this._next();
}
}
_current() {
return this._entries[this._index];
}
_done() {
return this._index + 1 >= this._entries.length;
}
_next() {
this._index++;
}
}
function* lineIterator(source) {
let current = 0;
let line = 1;
while (current < source.length) {
const next = source.indexOf('\n', current);
if (next === -1) break;
yield [line, source.substring(current, next)];
line++;
current = next + 1;
}
if (current < source.length) yield [line, source.substring(current)];
}
class LineBuilder {
_script;
_clickHandler;
_sourcePositions;
_selection;
_sourcePositionToMarkers = new Map();
constructor(panel, script, highlightPositions) {
this._script = script;
this._selection = new Set(highlightPositions);
this._clickHandler = panel.handleSourcePositionClick.bind(panel);
// TODO: sort on script finalization.
script.sourcePositions.sort((a, b) => {
if (a.line === b.line) return a.column - b.column;
return a.line - b.line;
});
this._sourcePositions = new SourcePositionIterator(script.sourcePositions);
}
get sourcePositionToMarkers() {
return this._sourcePositionToMarkers;
}
createScriptNode() {
const scriptNode = document.createElement('pre');
scriptNode.classList.add('scriptNode');
for (let [lineIndex, line] of lineIterator(this._script.source)) {
scriptNode.appendChild(this._createLineNode(lineIndex, line));
}
return scriptNode;
}
_createLineNode(lineIndex, line) {
const lineNode = document.createElement('span');
let columnIndex = 0;
for (const sourcePosition of this._sourcePositions.forLine(lineIndex)) {
const nextColumnIndex = sourcePosition.column - 1;
lineNode.appendChild(document.createTextNode(
line.substring(columnIndex, nextColumnIndex)));
columnIndex = nextColumnIndex;
lineNode.appendChild(
this._createMarkerNode(line[columnIndex], sourcePosition));
columnIndex++;
}
lineNode.appendChild(
document.createTextNode(line.substring(columnIndex) + '\n'));
return lineNode;
}
_createMarkerNode(text, sourcePosition) {
const marker = document.createElement('mark');
this._sourcePositionToMarkers.set(sourcePosition, marker);
marker.textContent = text;
marker.sourcePosition = sourcePosition;
marker.onclick = this._clickHandler;
return marker;
}
}
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