Iisyourdad
672 lines
24 KiB
JavaScript
672 lines
24 KiB
JavaScript
'use strict';
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const path = require('node:path');
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const { spawn, execFileSync } = require('node:child_process');
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const { desktopCapturer, screen, BrowserWindow, nativeImage, Tray, Menu, Notification } = require('electron');
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const { expandPlaceholders } = require('../core/placeholders');
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const raster = require('../core/raster');
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const { encodePng } = require('../core/png');
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/**
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* Capture service: full-screen, active-window, and region capture via
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* Electron's desktopCapturer, plus a click-marker annotation at the cursor
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* position and a capture session (start/pause/resume/finish).
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*
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* A session captures continuously, with three triggers layered by what the
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* platform supports:
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* - click-capture via an OS adapter (xinput on X11, PowerShell on Windows),
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* - a global hotkey (unreliable on some Wayland compositors),
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* - interval auto-capture as the always-works fallback.
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*
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* Note: under Wayland/WSLg, screen capture may require portal support; all
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* failures surface as { ok: false, reason } instead of crashing.
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*/
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// Dedupe duplicate watcher events for one physical click while still
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// allowing intentionally fast clicking.
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const CLICK_DEBOUNCE_MS = 150;
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// Idle gap between frame-loop grabs; the effective refresh rate is
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// grab-duration + this.
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const FRAME_LOOP_IDLE_MS = 50;
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// A buffered frame older than this is too stale to pass off as "the screen
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// at the instant of the click".
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const CLICK_FRAME_MAX_AGE_MS = 600;
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// How long a click waits for the in-flight grab before falling back to a
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// one-off fresh shot.
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const CLICK_FRAME_WAIT_MS = 2000;
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const CLICK_CAPTURE_HIDE_DELAY_MS = 25;
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function hasBinary(name) {
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try {
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execFileSync('which', [name], { stdio: 'pipe' });
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return true;
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} catch {
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return false;
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}
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}
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class CaptureService {
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constructor({ store, settings, getWindow, notify }) {
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this.store = store;
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this.settings = settings;
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this.getWindow = getWindow;
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this.notify = notify;
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this.session = null; // { guideId, paused, count, intervalSec }
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this.intervalTimer = null;
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this.clickWatcher = null;
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this.frameLoopTimer = null;
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this.frameLoopRunning = false;
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this.frameWaiters = [];
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this.latestFrame = null;
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this.lastClickCapture = 0;
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this.shooting = false;
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}
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state() {
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return this.session
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? {
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active: true,
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paused: this.session.paused,
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guideId: this.session.guideId,
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count: this.session.count,
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intervalSec: this.session.intervalSec || 0,
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clickCapture: Boolean(this.clickWatcher),
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clickCaptureAvailable: this.clickCaptureAvailable(),
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}
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: { active: false, clickCaptureAvailable: this.clickCaptureAvailable() };
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}
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clickCaptureAvailable() {
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if (this._clickAvail === undefined) {
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this._clickAvail = process.platform === 'win32' || (process.platform === 'linux' && hasBinary('xinput'));
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}
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return this._clickAvail;
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}
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startSession(guideId, { intervalSec = null } = {}) {
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this.finishSession();
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// Default trigger: clicks when the platform supports it, otherwise an
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// interval so a session always produces steps even if the global hotkey
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// never fires (common under Wayland/WSLg).
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let interval = intervalSec;
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if (interval == null) {
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interval = this.clickCaptureAvailable() ? 0 : (this.settings.get('capture.autoIntervalSec') || 5);
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}
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// Sessions start paused: nothing hides and no capturing happens until
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// the user explicitly presses "Start recording" in the capture bar, so
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// New Capture never makes the window vanish out from under them.
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this.session = { guideId, paused: true, count: 0, intervalSec: interval };
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if (this.settings.get('capture.captureOutsideClicks') !== false) this.startClickWatcher();
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this.applyInterval();
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this.notify('capture:state', this.state());
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// (Skipped for the dev screenshot hook, which needs a visible page.)
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if (!process.env.STEPFORGE_SCREENSHOT) {
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this.createSessionTray();
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const win = this.getWindow();
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// Remember whether the window was visible when the session was set
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// up — that's what `togglePause` uses to decide whether to tuck the
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// app away once the user actually starts recording.
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this.hiddenForSession = Boolean(win && !win.isDestroyed() && win.isVisible());
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try {
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new Notification({
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title: 'StepForge is ready to capture',
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body: 'Click "Start recording" in the red capture bar when you’re ready. The window tucks away and the red tray icon takes over.',
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}).show();
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} catch { /* notifications unavailable on this desktop */ }
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}
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}
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/** Red-dot tray icon with session controls, shown while recording. */
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createSessionTray() {
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this.destroySessionTray();
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try {
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const img = raster.createImage(16, 16, [0, 0, 0, 0]);
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raster.fillOval(img, 2, 2, 12, 12, [229, 72, 77, 255]);
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this.tray = new Tray(nativeImage.createFromBuffer(encodePng(img)));
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this.tray.setToolTip('StepForge — capture session running');
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const rebuild = () => {
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if (!this.tray || this.tray.isDestroyed()) return;
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this.tray.setContextMenu(Menu.buildFromTemplate([
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{ label: `Captured ${this.session ? this.session.count : 0} steps`, enabled: false },
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{ type: 'separator' },
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{ label: 'Capture now', click: () => this.sessionCapture('manual').then(rebuild).catch(() => {}) },
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{
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label: this.session && this.session.paused ? 'Resume capturing' : 'Pause capturing',
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click: () => { this.togglePause(); rebuild(); },
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},
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{
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label: 'Open StepForge (pauses capture)',
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click: () => {
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this.togglePause(true);
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this.showWindow();
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rebuild();
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},
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},
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{ type: 'separator' },
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{ label: 'Finish session', click: () => this.finishSession() },
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]));
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};
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rebuild();
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this.rebuildTrayMenu = rebuild;
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this.tray.on('click', () => {
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this.togglePause(true);
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this.showWindow();
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rebuild();
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});
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} catch {
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this.tray = null; // no tray on this desktop; cursor-over skip still protects clicks
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}
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}
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destroySessionTray() {
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if (this.tray && !this.tray.isDestroyed()) this.tray.destroy();
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this.tray = null;
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this.rebuildTrayMenu = null;
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}
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showWindow() {
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const win = this.getWindow();
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if (win && !win.isDestroyed()) {
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win.show();
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win.focus();
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}
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}
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setInterval(intervalSec) {
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if (!this.session) return this.state();
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this.session.intervalSec = Math.max(0, Number(intervalSec) || 0);
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this.applyInterval();
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this.notify('capture:state', this.state());
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return this.state();
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}
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applyInterval() {
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if (this.intervalTimer) {
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clearInterval(this.intervalTimer);
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this.intervalTimer = null;
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}
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const sec = this.session && this.session.intervalSec;
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if (sec > 0) {
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this.intervalTimer = setInterval(() => {
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this.sessionCapture('interval').catch(() => {});
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}, sec * 1000);
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}
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}
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togglePause(force) {
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if (!this.session) return;
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const wasPaused = this.session.paused;
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this.session.paused = typeof force === 'boolean' ? force : !this.session.paused;
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// Starting/resuming tucks the window away again for clean shots (after
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// a brief delay so the user sees it happen) and starts the frame loop
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// that serves click captures. Pausing stops the loop and discards the
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// buffered frame, so a resume can never serve a pre-pause screen.
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if (wasPaused && !this.session.paused) {
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const win = this.getWindow();
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const arm = () => {
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if (!this.session || this.session.paused) return;
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if (this.hiddenForSession && win && !win.isDestroyed() && win.isVisible()) win.hide();
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if (this.settings.get('capture.captureOutsideClicks') !== false && this.clickCaptureAvailable()) {
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this.startFrameLoop();
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}
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};
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if (this.hiddenForSession && win && !win.isDestroyed()) setTimeout(arm, 400);
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else arm();
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} else if (!wasPaused && this.session.paused) {
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this.stopFrameLoop();
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}
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if (this.rebuildTrayMenu) this.rebuildTrayMenu();
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this.notify('capture:state', this.state());
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}
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finishSession() {
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if (this.intervalTimer) {
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clearInterval(this.intervalTimer);
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this.intervalTimer = null;
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}
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this.stopClickWatcher();
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this.stopFrameLoop();
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this.destroySessionTray();
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this.session = null;
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if (this.hiddenForSession) {
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this.hiddenForSession = false;
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this.showWindow();
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}
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this.notify('capture:state', this.state());
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}
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/**
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* True when the user is interacting with StepForge itself. Deliberately
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* based on cursor position over the visible window, not isFocused():
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* some compositors (WSLg) report focus as stuck-true, which would block
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* every automatic capture forever.
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*/
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userIsInApp() {
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const win = this.getWindow();
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if (!win || win.isDestroyed() || !win.isVisible() || win.isMinimized()) return false;
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const cur = screen.getCursorScreenPoint();
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const b = win.getBounds();
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return cur.x >= b.x && cur.x <= b.x + b.width && cur.y >= b.y && cur.y <= b.y + b.height;
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}
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/** One capture inside the active session (hotkey/click/interval/manual). */
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async sessionCapture(trigger = 'hotkey', clickPos = null) {
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if (!this.session || this.session.paused) return { ok: false, reason: 'no active capture session' };
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// Automatic triggers stand down while the user is in StepForge, so the
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// app stays clickable mid-session and never screenshots itself.
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if (trigger !== 'manual' && this.userIsInApp()) {
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return { ok: false, reason: 'skipped — StepForge is focused' };
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}
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// Clicks are served from the frame loop: the buffered frame was grabbed
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// at (or moments before) the click instant, so the background matches
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// what the user clicked on. A click that lands while a grab is in
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// flight waits for that frame instead of being dropped, so fast
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// clicking still yields one step per click.
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if (trigger === 'click') {
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const frame = await this.frameForClick();
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if (!this.session || this.session.paused) return { ok: false, reason: 'no active capture session' };
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if (frame) {
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const result = this.storeFrameAsStep(this.session.guideId, frame.mode, frame, clickPos);
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if (result.ok) this.noteStepAdded(result.step, trigger);
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return result;
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}
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// No usable frame (loop not running or grab failing): fall through
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// to a one-off fresh shot.
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}
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if (this.shooting) return { ok: false, reason: 'capture already in progress' };
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this.shooting = true;
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try {
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const mode = this.settings.get('capture.mode') || 'fullscreen';
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const grabMode = mode === 'region' ? 'fullscreen' : mode;
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const finalResult = await this.shoot({
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guideId: this.session.guideId,
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mode: grabMode,
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delayMs: 0,
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hideWindowDelayMs: trigger === 'click' ? CLICK_CAPTURE_HIDE_DELAY_MS : null,
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refocus: false, // don't steal focus from the app the user is documenting
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clickPos,
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});
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if (finalResult.ok) this.noteStepAdded(finalResult.step, trigger);
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return finalResult;
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} finally {
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this.shooting = false;
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}
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}
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noteStepAdded(step, trigger) {
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this.session.count += 1;
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this.notify('capture:added', { guideId: this.session.guideId, step, trigger });
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this.notify('capture:state', this.state());
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if (this.rebuildTrayMenu) this.rebuildTrayMenu(); // refresh step counter
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}
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hotkeyCapture() {
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return this.sessionCapture('hotkey');
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}
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// ---- click-triggered capture --------------------------------------------
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/**
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* Continuous screen-grab loop that runs while recording. It keeps the most
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* recent frame in `latestFrame` so a click can be served from a frame
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* grabbed at (or moments before) the instant of the click — a fresh grab
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* started after the click would land hundreds of ms late and show the
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* click's effects instead of what the user clicked on.
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*/
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startFrameLoop() {
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if (this.frameLoopRunning) return;
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this.frameLoopRunning = true;
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const tick = async () => {
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if (!this.frameLoopRunning) return;
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if (!this.session || this.session.paused) {
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this.frameLoopRunning = false;
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return;
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}
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try {
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if (!this.shooting) {
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const mode = this.settings.get('capture.mode') || 'fullscreen';
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const grabMode = mode === 'region' ? 'fullscreen' : mode;
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const frame = await this.captureCurrentFrame(grabMode);
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if (this.frameLoopRunning) this.acceptFrame(frame);
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}
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} catch {
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// Grab failures are fine — clicks fall back to a one-off fresh shot.
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} finally {
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if (this.frameLoopRunning && this.session && !this.session.paused) {
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this.frameLoopTimer = setTimeout(tick, FRAME_LOOP_IDLE_MS);
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}
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}
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};
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this.frameLoopTimer = setTimeout(tick, 0);
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}
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/** Store a grabbed frame and hand it to any clicks waiting on it. */
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acceptFrame(frame) {
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this.latestFrame = frame;
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const waiters = this.frameWaiters;
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this.frameWaiters = [];
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for (const resolve of waiters) resolve(frame);
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}
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/** Resolves with the next frame the loop grabs (null on timeout/stop). */
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nextFrame(timeoutMs) {
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return new Promise((resolve) => {
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const entry = (frame) => {
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clearTimeout(timer);
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resolve(frame);
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};
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const timer = setTimeout(() => {
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this.frameWaiters = this.frameWaiters.filter((w) => w !== entry);
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resolve(null);
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}, timeoutMs);
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this.frameWaiters.push(entry);
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});
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}
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stopFrameLoop() {
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if (this.frameLoopTimer) {
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clearTimeout(this.frameLoopTimer);
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this.frameLoopTimer = null;
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}
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this.frameLoopRunning = false;
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this.latestFrame = null;
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const waiters = this.frameWaiters;
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this.frameWaiters = [];
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for (const resolve of waiters) resolve(null);
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}
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/**
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* Freshest frame usable for a click capture: the buffered frame when it's
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* recent enough, otherwise the next frame the loop delivers. Null when the
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* loop isn't running or can't deliver in time.
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*/
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async frameForClick() {
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const mode = this.settings.get('capture.mode') || 'fullscreen';
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const grabMode = mode === 'region' ? 'fullscreen' : mode;
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const usable = (f) => f && f.mode === grabMode
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&& Date.now() - f.capturedAt <= CLICK_FRAME_MAX_AGE_MS;
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if (usable(this.latestFrame)) return this.latestFrame;
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if (!this.frameLoopRunning) return null;
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const next = await this.nextFrame(CLICK_FRAME_WAIT_MS);
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return usable(next) ? next : null;
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}
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startClickWatcher() {
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this.stopClickWatcher();
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try {
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if (process.platform === 'linux' && hasBinary('xinput')) {
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// Stream raw button events from the X server; one capture per press.
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this.clickWatcher = spawn('xinput', ['test-xi2', '--root'], { stdio: ['ignore', 'pipe', 'ignore'] });
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let sawPress = false;
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this.clickWatcher.stdout.on('data', (chunk) => {
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const text = chunk.toString();
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if (/RawButtonPress|ButtonPress/.test(text)) sawPress = true;
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if (sawPress) {
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sawPress = false;
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this.onOsClick();
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}
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});
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} else if (process.platform === 'win32') {
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// Poll the left mouse button via GetAsyncKeyState; print one line per click.
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const ps = `
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Add-Type -Namespace W -Name U -MemberDefinition '[DllImport("user32.dll")] public static extern short GetAsyncKeyState(int k);'
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$down = $false
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while ($true) {
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$s = [W.U]::GetAsyncKeyState(0x01) -band 0x8000
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if ($s -and -not $down) { Write-Output CLICK }
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$down = [bool]$s
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Start-Sleep -Milliseconds 10
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}`;
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this.clickWatcher = spawn('powershell.exe', ['-NoProfile', '-Command', ps], { stdio: ['ignore', 'pipe', 'ignore'] });
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this.clickWatcher.stdout.on('data', (chunk) => {
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if (chunk.toString().includes('CLICK')) this.onOsClick();
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});
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}
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if (this.clickWatcher) {
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this.clickWatcher.on('error', () => { this.clickWatcher = null; });
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this.clickWatcher.on('exit', () => { this.clickWatcher = null; });
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}
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} catch {
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this.clickWatcher = null;
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}
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}
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stopClickWatcher() {
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if (this.clickWatcher) {
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try { this.clickWatcher.kill(); } catch { /* already gone */ }
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this.clickWatcher = null;
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}
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}
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onOsClick() {
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if (!this.session || this.session.paused) return;
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// Ignore clicks on StepForge itself (pausing, finishing, editing).
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if (BrowserWindow.getFocusedWindow()) return;
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const now = Date.now();
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if (now - this.lastClickCapture < CLICK_DEBOUNCE_MS) return;
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this.lastClickCapture = now;
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// Grab the cursor position synchronously, right when the click is
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// detected, so the marker lands exactly where the user clicked even if
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// the shot itself takes a moment to grab.
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const clickPos = screen.getCursorScreenPoint();
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this.sessionCapture('click', clickPos).catch(() => {});
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}
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async captureCurrentFrame(mode) {
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const grabbed = await this.grab(mode);
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return {
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mode,
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png: grabbed.image.toPNG(),
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size: grabbed.image.getSize(),
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display: grabbed.display,
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cursor: grabbed.cursor,
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capturedAt: Date.now(),
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};
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}
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storeFrameAsStep(guideId, mode, frame, clickPos = null) {
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if (!frame) return { ok: false, reason: 'no capture frame available' };
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const annotations = [];
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const cursor = clickPos || frame.cursor;
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if (mode !== 'window' && this.settings.get('capture.clickMarker')) {
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const fx = (cursor.x - frame.display.bounds.x) / frame.display.bounds.width;
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const fy = (cursor.y - frame.display.bounds.y) / frame.display.bounds.height;
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if (fx >= 0 && fx <= 1 && fy >= 0 && fy <= 1) {
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const d = 0.035;
|
||
annotations.push({
|
||
type: 'oval',
|
||
x: fx - d / 2, y: fy - (d * frame.size.width / frame.size.height) / 2,
|
||
w: d, h: d * frame.size.width / frame.size.height,
|
||
style: {
|
||
stroke: this.settings.get('capture.clickMarkerColor') || '#E5484D',
|
||
strokeWidth: 4, fill: 'transparent',
|
||
},
|
||
});
|
||
}
|
||
}
|
||
|
||
const step = this.store.addStep(guideId, {
|
||
title: this.autoTitle(mode),
|
||
annotations,
|
||
focusedView: {
|
||
enabled: Boolean(this.settings.get('editor.focusedViewDefaultForNewSteps')),
|
||
zoom: 1, panX: 0.5, panY: 0.5,
|
||
},
|
||
}, frame.png, frame.size);
|
||
return { ok: true, step };
|
||
}
|
||
|
||
autoTitle(mode) {
|
||
const tplStr = this.settings.get('editor.autoTitleTemplate') || '[[Mode]] capture [[Time]]';
|
||
const now = new Date();
|
||
const pad = (n) => String(n).padStart(2, '0');
|
||
return expandPlaceholders(tplStr, {
|
||
Mode: { fullscreen: 'Screen', window: 'Window', region: 'Region' }[mode] || 'Screen',
|
||
Time: `${pad(now.getHours())}:${pad(now.getMinutes())}:${pad(now.getSeconds())}`,
|
||
Date: `${now.getFullYear()}-${pad(now.getMonth() + 1)}-${pad(now.getDate())}`,
|
||
});
|
||
}
|
||
|
||
/** Grab the screen/window image as { image, display } or throw. */
|
||
async grab(mode) {
|
||
const cursor = screen.getCursorScreenPoint();
|
||
const display = screen.getDisplayNearestPoint(cursor);
|
||
const { width, height } = display.size;
|
||
const scale = display.scaleFactor || 1;
|
||
// Ask for both kinds: some compositors (WSLg/Wayland portals) expose no
|
||
// individual window sources, so window mode falls back to the screen.
|
||
const sources = await desktopCapturer.getSources({
|
||
types: mode === 'window' ? ['window', 'screen'] : ['screen'],
|
||
thumbnailSize: { width: Math.round(width * scale), height: Math.round(height * scale) },
|
||
});
|
||
if (!sources.length) throw new Error('no capture sources available (portal/permissions?)');
|
||
|
||
let source = null;
|
||
if (mode === 'window') {
|
||
const win = this.getWindow();
|
||
const ownTitle = win ? win.getTitle() : '';
|
||
const windows = sources.filter((s) => s.id.startsWith('window:'));
|
||
source = windows.find((s) => s.name && s.name !== ownTitle && !/stepforge/i.test(s.name))
|
||
|| windows[0]
|
||
|| sources.find((s) => s.id.startsWith('screen:'));
|
||
} else {
|
||
const screens = sources.filter((s) => s.id.startsWith('screen:'));
|
||
source = screens.find((s) => String(s.display_id) === String(display.id)) || screens[0] || sources[0];
|
||
}
|
||
if (!source) throw new Error('no capture source matched');
|
||
const image = source.thumbnail;
|
||
if (!image || image.isEmpty()) throw new Error('capture returned an empty image');
|
||
return { image, display, cursor };
|
||
}
|
||
|
||
/**
|
||
* Hide the app window while `fn` runs so screenshots show the user's work,
|
||
* not StepForge itself. Restores visibility afterwards.
|
||
*/
|
||
async withWindowHidden(fn, { refocus = true, pauseMs = 350 } = {}) {
|
||
const win = this.getWindow();
|
||
const wasVisible = win && !win.isDestroyed() && win.isVisible() && !win.isMinimized();
|
||
if (wasVisible) {
|
||
win.hide();
|
||
if (pauseMs > 0) {
|
||
await new Promise((r) => setTimeout(r, pauseMs)); // let the compositor repaint
|
||
}
|
||
}
|
||
try {
|
||
return await fn();
|
||
} finally {
|
||
if (wasVisible && win && !win.isDestroyed()) {
|
||
if (refocus) {
|
||
win.show();
|
||
win.focus();
|
||
} else {
|
||
win.showInactive();
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Take a screenshot and append it to the guide as a new image step.
|
||
* Adds a click-marker annotation at the cursor position when enabled.
|
||
*/
|
||
async shoot({
|
||
guideId,
|
||
mode = 'fullscreen',
|
||
delayMs = null,
|
||
hideWindow = true,
|
||
refocus = true,
|
||
hideWindowDelayMs = null,
|
||
clickPos = null,
|
||
}) {
|
||
const delay = delayMs == null ? this.settings.get('capture.delayMs') || 0 : delayMs;
|
||
if (delay > 0) await new Promise((resolve) => setTimeout(resolve, delay));
|
||
let frame;
|
||
try {
|
||
frame = hideWindow
|
||
? await this.withWindowHidden(() => this.captureCurrentFrame(mode), {
|
||
refocus,
|
||
pauseMs: hideWindowDelayMs == null ? 350 : hideWindowDelayMs,
|
||
})
|
||
: await this.captureCurrentFrame(mode);
|
||
} catch (err) {
|
||
return { ok: false, reason: err.message };
|
||
}
|
||
return this.storeFrameAsStep(guideId, mode, frame, clickPos);
|
||
}
|
||
|
||
/**
|
||
* Region capture: shoot the full screen, then let the user drag a
|
||
* rectangle in a fullscreen overlay; the crop becomes the step image.
|
||
*/
|
||
async regionCapture(guideId) {
|
||
let grabbed;
|
||
try {
|
||
grabbed = await this.withWindowHidden(() => this.grab('fullscreen'));
|
||
} catch (err) {
|
||
return { ok: false, reason: err.message };
|
||
}
|
||
const { image, display } = grabbed;
|
||
const rect = await this.pickRegion(display, image);
|
||
if (!rect) return { ok: false, reason: 'selection cancelled' };
|
||
|
||
const cropped = image.crop(rect);
|
||
const size = cropped.getSize();
|
||
if (!size.width || !size.height) return { ok: false, reason: 'empty selection' };
|
||
const step = this.store.addStep(guideId, { title: this.autoTitle('region') },
|
||
cropped.toPNG(), size);
|
||
return { ok: true, step };
|
||
}
|
||
|
||
/** Fullscreen overlay window that resolves with a crop rect (image px). */
|
||
pickRegion(display, image) {
|
||
return new Promise((resolve) => {
|
||
const overlay = new BrowserWindow({
|
||
x: display.bounds.x,
|
||
y: display.bounds.y,
|
||
width: display.bounds.width,
|
||
height: display.bounds.height,
|
||
frame: false,
|
||
transparent: true,
|
||
alwaysOnTop: true,
|
||
fullscreen: true,
|
||
skipTaskbar: true,
|
||
webPreferences: {
|
||
preload: path.join(__dirname, 'region-preload.js'),
|
||
contextIsolation: true,
|
||
},
|
||
});
|
||
let settled = false;
|
||
const finish = (rect) => {
|
||
if (settled) return;
|
||
settled = true;
|
||
if (!overlay.isDestroyed()) overlay.close();
|
||
resolve(rect);
|
||
};
|
||
const { ipcMain } = require('electron');
|
||
const onPick = (event, rect) => {
|
||
if (event.sender !== overlay.webContents) return;
|
||
ipcMain.removeListener('region:picked', onPick);
|
||
if (!rect) return finish(null);
|
||
const imgSize = image.getSize();
|
||
const sx = imgSize.width / display.bounds.width;
|
||
const sy = imgSize.height / display.bounds.height;
|
||
finish({
|
||
x: Math.round(rect.x * sx),
|
||
y: Math.round(rect.y * sy),
|
||
width: Math.round(rect.w * sx),
|
||
height: Math.round(rect.h * sy),
|
||
});
|
||
};
|
||
ipcMain.on('region:picked', onPick);
|
||
overlay.on('closed', () => finish(null));
|
||
overlay.loadFile(path.join(__dirname, 'renderer', 'region.html'));
|
||
});
|
||
}
|
||
}
|
||
|
||
module.exports = CaptureService;
|