2a:null 2b:["$","title",null,{"children":"Caffeine | Craig Latta | Observable"}] 30:Td1fe,// Provide browser services to the SqueakJS virtual machine { /* * Copyright (c) 2013-2016 Bert Freudenberg * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ "use strict"; ////////////////////////////////////////////////////////////////////////////// // these functions fake the Lively module and class system // just enough so the loading of vm.js succeeds ////////////////////////////////////////////////////////////////////////////// window.module = function(dottedPath) { if (dottedPath === "") return window; var path = dottedPath.split("."), name = path.pop(), parent = window.module(path.join(".")), self = parent[name]; if (!self) parent[name] = self = { loaded: false, pending: [], requires: function(req) { return { toRun: function(code) { function load() { code(); self.loaded = true; self.pending.forEach(function(f){f();}); } if (req && !window.module(req).loaded) { window.module(req).pending.push(load); } else { load(); } } }; }, }; return self; }; Object.extend = function(obj /* + more args */ ) { // skip arg 0, copy properties of other args to obj for (var i = 1; i < arguments.length; i++) if (typeof arguments[i] == 'object') for (var name in arguments[i]) obj[name] = arguments[i][name]; }; Function.prototype.subclass = function(classPath /* + more args */ ) { // create subclass var subclass = function() { if (this.initialize) this.initialize.apply(this, arguments); return this; }; // set up prototype var protoclass = function() { }; protoclass.prototype = this.prototype; subclass.prototype = new protoclass(); // skip arg 0, copy properties of other args to prototype for (var i = 1; i < arguments.length; i++) Object.extend(subclass.prototype, arguments[i]); // add class to module var modulePath = classPath.split("."), className = modulePath.pop(); window.module(modulePath.join('.'))[className] = subclass; return subclass; }; ////////////////////////////////////////////////////////////////////////////// // load vm, plugins, and other libraries ////////////////////////////////////////////////////////////////////////////// (function(){ var vmDir = "https://california.demo.blackpagedigital.com/caffeine/js/squeakjs/"; ["vm.js", "jit.js", "plugins/ADPCMCodecPlugin.js", "plugins/B2DPlugin.js", "plugins/BitBltPlugin.js", "plugins/FFTPlugin.js", "plugins/FloatArrayPlugin.js", "plugins/Flow.js", "plugins/GeniePlugin.js", "plugins/JPEGReaderPlugin.js", "plugins/KedamaPlugin.js", "plugins/KedamaPlugin2.js", "plugins/Klatt.js", "plugins/LargeIntegers.js", "plugins/Matrix2x3Plugin.js", "plugins/MiscPrimitivePlugin.js", "plugins/ScratchPlugin.js", "plugins/SocketPlugin.js", "plugins/SpeechPlugin.js", "plugins/SqueakSSL.js", "plugins/SoundGenerationPlugin.js", "plugins/StarSqueakPlugin.js", "plugins/ZipPlugin.js", "lib/lz-string.js", "lib/jszip.js", "lib/FileSaver.js"].forEach(function(filename) { var script = document.createElement('script'); script.setAttribute("type", "text/javascript"); script.setAttribute("src", vmDir + filename); document.getElementsByTagName("head")[0].appendChild(script)})})(); window.module("SqueakJS").requires("users.bert.SqueakJS.vm").toRun(function() { // if in private mode set localStorage to a regular dict var localStorage = window.localStorage; try { localStorage["squeak-foo:"] = "bar"; if (localStorage["squeak-foo:"] !== "bar") throw Error(); delete localStorage["squeak-foo:"]; } catch(e) { localStorage = {}; } ////////////////////////////////////////////////////////////////////////////// // display & event setup ////////////////////////////////////////////////////////////////////////////// function setupFullscreen(display, canvas, options) { // Fullscreen can only be enabled in an event handler. So we check the // fullscreen flag on every mouse down/up and keyboard event. var box = canvas.parentElement, fullscreenEvent = "fullscreenchange", fullscreenElement = "fullscreenElement", fullscreenEnabled = "fullscreenEnabled"; if (!box.requestFullscreen) { [ // Fullscreen support is still very browser-dependent {req: box.webkitRequestFullscreen, exit: document.webkitExitFullscreen, evt: "webkitfullscreenchange", elem: "webkitFullscreenElement", enable: "webkitFullscreenEnabled"}, {req: box.mozRequestFullScreen, exit: document.mozCancelFullScreen, evt: "mozfullscreenchange", elem: "mozFullScreenElement", enable: "mozFullScreenEnabled"}, {req: box.msRequestFullscreen, exit: document.msExitFullscreen, evt: "MSFullscreenChange", elem: "msFullscreenElement", enable: "msFullscreenEnabled"}, ].forEach(function(browser) { if (browser.req) { box.requestFullscreen = browser.req; document.exitFullscreen = browser.exit; fullscreenEvent = browser.evt; fullscreenElement = browser.elem; fullscreenEnabled = browser.enable; } }); } // If the user canceled fullscreen, turn off the fullscreen flag so // we don't try to enable it again in the next event function fullscreenChange(fullscreen) { display.fullscreen = fullscreen; box.style.background = fullscreen ? 'black' : ''; if (options.header) options.header.style.display = fullscreen ? 'none' : ''; if (options.footer) options.footer.style.display = fullscreen ? 'none' : ''; if (options.fullscreenCheckbox) options.fullscreenCheckbox.checked = fullscreen; setTimeout(window.onresize, 0); } var checkFullscreen; if (box.requestFullscreen) { document.addEventListener(fullscreenEvent, function(){fullscreenChange(box == document[fullscreenElement]);}); checkFullscreen = function() { if (document[fullscreenEnabled] && (box == document[fullscreenElement]) != display.fullscreen) { if (display.fullscreen) box.requestFullscreen(); else document.exitFullscreen(); } }; } else { var isFullscreen = false; checkFullscreen = function() { if ((options.header || options.footer) && isFullscreen != display.fullscreen) { isFullscreen = display.fullscreen; fullscreenChange(isFullscreen); } }; } if (options.fullscreenCheckbox) options.fullscreenCheckbox.onclick = function() { display.fullscreen = options.fullscreenCheckbox.checked; checkFullscreen(); }; return checkFullscreen; } function setupSwapButtons(options) { if (options.swapCheckbox) { var imageName = localStorage["squeakImageName"] || "default", settings = JSON.parse(localStorage["squeakSettings:" + imageName] || "{}"); if ("swapButtons" in settings) options.swapButtons = settings.swapButtons; options.swapCheckbox.checked = options.swapButtons; options.swapCheckbox.onclick = function() { options.swapButtons = options.swapCheckbox.checked; settings["swapButtons"] = options.swapButtons; localStorage["squeakSettings:" + imageName] = JSON.stringify(settings); }; } } function recordModifiers(evt, display) { var shiftPressed, modifiers, ctrlPressed = evt.ctrlKey && !evt.altKey, cmdPressed = evt.metaKey || (evt.altKey && !evt.ctrlKey) if (evt.shiftKey) {shiftPressed = evt.shiftKey} else { if (window.canvas) {shiftPressed = window.canvas.shiftKey} else {shiftPressed = false}} modifiers = (shiftPressed ? window.Squeak.Keyboard_Shift : 0) + (ctrlPressed ? window.Squeak.Keyboard_Ctrl : 0) + (cmdPressed ? window.Squeak.Keyboard_Cmd : 0); display.buttons = (display.buttons & ~window.Squeak.Keyboard_All) | modifiers; return modifiers; } var canUseMouseOffset = navigator.userAgent.match("AppleWebKit/"); function updateMousePos(evt, canvas, display) { var x, y; if (evt.projected) { x = evt.projectedX; y = evt.projectedY;} else { var evtX, evtY; evtX = canUseMouseOffset ? evt.offsetX : evt.layerX, evtY = canUseMouseOffset ? evt.offsetY : evt.layerY; if (display.cursorCanvas) { display.cursorCanvas.style.left = (evtX + canvas.offsetLeft + display.cursorOffsetX) + "px"; display.cursorCanvas.style.top = (evtY + canvas.offsetTop + display.cursorOffsetY) + "px"; } var x = (evtX * canvas.width / canvas.offsetWidth) | 0, y = (evtY * canvas.height / canvas.offsetHeight) | 0;} // clamp to display size display.mouseX = Math.max(0, Math.min(display.width, x)); display.mouseY = Math.max(0, Math.min(display.height, y)); } function recordMouseEvent(what, evt, canvas, display, eventQueue, options) { updateMousePos(evt, canvas, display); if (!display.vm) return; var buttons = display.buttons & window.Squeak.Mouse_All; switch (what) { case 'mousedown': switch (evt.button || 0) { case 0: buttons = window.Squeak.Mouse_Red; break; // left case 1: buttons = window.Squeak.Mouse_Yellow; break; // middle case 2: buttons = window.Squeak.Mouse_Blue; break; // right } if (options.swapButtons) if (buttons == window.Squeak.Mouse_Yellow) buttons = window.Squeak.Mouse_Blue; else if (buttons == window.Squeak.Mouse_Blue) buttons = window.Squeak.Mouse_Yellow; break; case 'mousemove': break; // nothing more to do case 'mouseup': buttons = 0; break; } display.buttons = buttons | recordModifiers(evt, display); if (eventQueue) { eventQueue.push([ window.Squeak.EventTypeMouse, evt.timeStamp, // converted to Squeak time in makeSqueakEvent() display.mouseX, display.mouseY, display.buttons & window.Squeak.Mouse_All, display.buttons >> 3, ]); if (display.signalInputEvent) display.signalInputEvent(); } display.idle = 0; if (what == 'mouseup') { if (display.runFor) display.runFor(100); // maybe we catch the fullscreen flag change } else { if (display.runNow) display.runNow(); // don't wait for timeout to run } } function recordKeyboardEvent(key, timestamp, display, eventQueue) { if (!display.vm) return; var code = (display.buttons >> 3) << 8 | key; if (code === display.vm.interruptKeycode) { display.vm.interruptPending = true; } else if (eventQueue) { eventQueue.push([ window.Squeak.EventTypeKeyboard, timestamp, // converted to Squeak time in makeSqueakEvent() key, // MacRoman window.Squeak.EventKeyChar, display.buttons >> 3, key, // Unicode ]); if (display.signalInputEvent) display.signalInputEvent(); } else { // no event queue, queue keys the old-fashioned way display.keys.push(code); } display.idle = 0; if (display.runNow) display.runNow(); // don't wait for timeout to run } function recordDragDropEvent(type, evt, canvas, display, eventQueue) { if (!display.vm || !eventQueue) return; updateMousePos(evt, canvas, display); eventQueue.push([ window.Squeak.EventTypeDragDropFiles, evt.timeStamp, // converted to Squeak time in makeSqueakEvent() type, display.mouseX, display.mouseY, display.buttons >> 3, display.droppedFiles.length, ]); if (display.signalInputEvent) display.signalInputEvent(); } function fakeCmdOrCtrlKey(key, timestamp, display, eventQueue) { // set both Cmd and Ctrl bit, because we don't know what the image wants display.buttons &= ~window.Squeak.Keyboard_All; // remove all modifiers display.buttons |= window.Squeak.Keyboard_Cmd | window.Squeak.Keyboard_Ctrl; display.keys = []; // flush other keys recordKeyboardEvent(key, timestamp, display, eventQueue); } function makeSqueakEvent(evt, sqEvtBuf, sqTimeOffset) { sqEvtBuf[0] = evt[0]; sqEvtBuf[1] = (evt[1] - sqTimeOffset) & window.Squeak.MillisecondClockMask; for (var i = 2; i < evt.length; i++) sqEvtBuf[i] = evt[i]; } function createSqueakDisplay(canvas, options) { options = options || {}; if (options.fullscreen) { document.body.style.margin = 0; document.body.style.backgroundColor = 'black'; document.ontouchmove = function(evt) { evt.preventDefault(); }; if (options.header) options.header.style.display = 'none'; if (options.footer) options.footer.style.display = 'none'; } var display = { headless: false, context: canvas.getContext("2d"), fullscreen: false, width: 0, // if 0, VM uses canvas.width height: 0, // if 0, VM uses canvas.height mouseX: 0, mouseY: 0, buttons: 0, keys: [], clipboardString: '', clipboardStringChanged: false, cursorCanvas: options.cursor !== false && document.createElement("canvas"), cursorOffsetX: 0, cursorOffsetY: 0, droppedFiles: [], signalInputEvent: null, // function set by VM // additional functions added below }; setupSwapButtons(options); if (options.pixelated) { canvas.classList.add("pixelated"); display.cursorCanvas && display.cursorCanvas.classList.add("pixelated"); } var eventQueue = null; display.reset = function() { eventQueue = null; display.signalInputEvent = null; display.lastTick = 0; display.getNextEvent = function(firstEvtBuf, firstOffset) { // might be called from VM to get queued event eventQueue = []; // create queue on first call eventQueue.push = function(evt) { eventQueue.offset = Date.now() - evt[1]; // get epoch from first event delete eventQueue.push; // use original push from now on eventQueue.push(evt); }; display.getNextEvent = function(evtBuf, timeOffset) { var evt = eventQueue.shift(); if (evt) makeSqueakEvent(evt, evtBuf, timeOffset - eventQueue.offset); else evtBuf[0] = window.Squeak.EventTypeNone; }; display.getNextEvent(firstEvtBuf, firstOffset); }; }; display.reset(); var checkFullscreen = setupFullscreen(display, canvas, options); display.fullscreenRequest = function(fullscreen, thenDo) { // called from primitive to change fullscreen mode if (display.fullscreen != fullscreen) { display.fullscreen = fullscreen; display.resizeTodo = thenDo; // called after resizing display.resizeTodoTimeout = setTimeout(display.resizeDone, 1000); checkFullscreen(); } else thenDo(); }; display.resizeDone = function() { clearTimeout(display.resizeTodoTimeout); var todo = display.resizeTodo; if (todo) { display.resizeTodo = null; todo(); } }; display.clear = function() { canvas.width = canvas.width; }; display.showBanner = function(msg, style) { style = style || {}; var ctx = display.context; ctx.fillStyle = 'black'; ctx.fillRect(0, 0, canvas.width, canvas.height); ctx.fillStyle = style.color || "#F90"; ctx.font = style.font || "bold 48px sans-serif"; if (!style.font && ctx.measureText(msg).width > canvas.width) ctx.font = "bold 24px sans-serif"; ctx.textAlign = "center"; ctx.textBaseline = "middle"; ctx.fillText(msg, canvas.width / 2, canvas.height / 2); }; display.showProgress = function(value, style) { var realValue = Math.max(value, 0.05); style = style || {}; var ctx = display.context, w = (canvas.width / 3) | 0, h = 24, x = canvas.width * 0.5 - w / 2, y = canvas.height * 0.5 + 2 * h; ctx.fillStyle = style.background || "#000"; ctx.fillRect(x, y, w, h); ctx.lineWidth = 2; ctx.strokeStyle = style.color || "#F90"; ctx.strokeRect(x, y, w, h); ctx.fillStyle = style.color || "#F90"; ctx.fillRect(x, y, w * realValue, h); }; display.executeClipboardPaste = function(text, timestamp) { if (!display.vm) return true; try { display.clipboardString = text; // simulate paste event for Squeak fakeCmdOrCtrlKey('v'.charCodeAt(0), timestamp, display, eventQueue); } catch(err) { console.error("paste error " + err); } }; display.executeClipboardCopy = function(key, timestamp) { if (!display.vm) return true; // simulate copy event for Squeak so it places its text in clipboard display.clipboardStringChanged = false; fakeCmdOrCtrlKey((key || 'c').charCodeAt(0), timestamp, display, eventQueue); var start = Date.now(); // now interpret until Squeak has copied to the clipboard while (!display.clipboardStringChanged && Date.now() - start < 500) display.vm.interpret(20); if (!display.clipboardStringChanged) return; // got it, now copy to the system clipboard try { return display.clipboardString; } catch(err) { console.error("copy error " + err); } }; canvas.onmousedown = function(evt) { checkFullscreen(); recordMouseEvent('mousedown', evt, canvas, display, eventQueue, options); evt.preventDefault(); return false; }; canvas.onmouseup = function(evt) { recordMouseEvent('mouseup', evt, canvas, display, eventQueue, options); checkFullscreen(); evt.preventDefault(); }; canvas.onmousemove = function(evt) { recordMouseEvent('mousemove', evt, canvas, display, eventQueue, options); evt.preventDefault(); }; canvas.oncontextmenu = function() { return false; }; // touch event handling var touch = { state: 'idle', button: 0, x: 0, y: 0, dist: 0, down: {}, }; // window.top.touch = touch; function touchToMouse(evt) { if (evt.touches.length) { // average all touch positions touch.x = touch.y = 0; for (var i = 0; i < evt.touches.length; i++) { touch.x += evt.touches[i].pageX / evt.touches.length; touch.y += evt.touches[i].pageY / evt.touches.length; } } return { timeStamp: evt.timeStamp, button: touch.button, offsetX: touch.x - canvas.offsetLeft, offsetY: touch.y - canvas.offsetTop, }; } function dd(ax, ay, bx, by) {var x = ax - bx, y = ay - by; return Math.sqrt(x*x + y*y);} function dist(a, b) {return dd(a.pageX, a.pageY, b.pageX, b.pageY);} function dent(n, l, t, u) { return n < l ? n + t - l : n > u ? n + t - u : t; } function adjustDisplay(l, t, w, h) { var cursorCanvas = display.cursorCanvas, scale = w / canvas.width; canvas.style.left = (l|0) + "px"; canvas.style.top = (t|0) + "px"; canvas.style.width = (w|0) + "px"; canvas.style.height = (h|0) + "px"; if (cursorCanvas) { cursorCanvas.style.left = (l + display.cursorOffsetX + display.mouseX * scale|0) + "px"; cursorCanvas.style.top = (t + display.cursorOffsetY + display.mouseY * scale|0) + "px"; cursorCanvas.style.width = (cursorCanvas.width * scale|0) + "px"; cursorCanvas.style.height = (cursorCanvas.height * scale|0) + "px"; } if (!options.pixelated) { if (scale >= 3) { canvas.classList.add("pixelated"); cursorCanvas && cursorCanvas.classList.add("pixelated"); } else { canvas.classList.remove("pixelated"); cursorCanvas && display.cursorCanvas.classList.remove("pixelated"); } } return scale; } // zooming/panning with two fingers var maxZoom = 5; function zoomStart(evt) { touch.dist = dist(evt.touches[0], evt.touches[1]); touch.down.x = touch.x; touch.down.y = touch.y; touch.down.dist = touch.dist; touch.down.left = canvas.offsetLeft; touch.down.top = canvas.offsetTop; touch.down.width = canvas.offsetWidth; touch.down.height = canvas.offsetHeight; // store original canvas bounds if (!touch.orig) touch.orig = { left: touch.down.left, top: touch.down.top, right: touch.down.left + touch.down.width, bottom: touch.down.top + touch.down.height, width: touch.down.width, height: touch.down.height, }; } function zoomMove(evt) { if (evt.touches.length < 2) return; touch.dist = dist(evt.touches[0], evt.touches[1]); var minScale = touch.orig.width / touch.down.width, //nowScale = dent(touch.dist / touch.down.dist, 0.8, 1, 1.5), nowScale = touch.dist / touch.down.dist, scale = Math.min(Math.max(nowScale, minScale * 0.95), minScale * maxZoom), w = touch.down.width * scale, h = touch.orig.height * w / touch.orig.width, l = touch.down.left - (touch.down.x - touch.down.left) * (scale - 1) + (touch.x - touch.down.x), t = touch.down.top - (touch.down.y - touch.down.top) * (scale - 1) + (touch.y - touch.down.y); // allow to rubber-band by 20px for feedback l = Math.max(Math.min(l, touch.orig.left + 20), touch.orig.right - w - 20); t = Math.max(Math.min(t, touch.orig.top + 20), touch.orig.bottom - h - 20); adjustDisplay(l, t, w, h); } function zoomEnd(evt) { var l = canvas.offsetLeft, t = canvas.offsetTop, w = canvas.offsetWidth, h = canvas.offsetHeight; w = Math.min(Math.max(w, touch.orig.width), touch.orig.width * maxZoom); h = touch.orig.height * w / touch.orig.width; l = Math.max(Math.min(l, touch.orig.left), touch.orig.right - w); t = Math.max(Math.min(t, touch.orig.top), touch.orig.bottom - h); var scale = adjustDisplay(l, t, w, h); if ((scale - display.initialScale) < 0.0001) { touch.orig = null; window.onresize(); } } // State machine to distinguish between 1st/2nd mouse button and zoom/pan: // * if moved, or no 2nd finger within 100ms of 1st down, start mousing // * if fingers moved significantly within 200ms of 2nd down, start zooming // * if touch ended within this time, generate click (down+up) // * otherwise, start mousing with 2nd button // When mousing, always generate a move event before down event so that // mouseover eventhandlers in image work better canvas.ontouchstart = function(evt) { evt.preventDefault(); var e = touchToMouse(evt); for (var i = 0; i < evt.changedTouches.length; i++) { switch (touch.state) { case 'idle': touch.state = 'got1stFinger'; touch.first = e; setTimeout(function(){ if (touch.state !== 'got1stFinger') return; touch.state = 'mousing'; touch.button = e.button = 0; recordMouseEvent('mousemove', e, canvas, display, eventQueue, options); recordMouseEvent('mousedown', e, canvas, display, eventQueue, options); }, 100); break; case 'got1stFinger': touch.state = 'got2ndFinger'; zoomStart(evt); setTimeout(function(){ if (touch.state !== 'got2ndFinger') return; var didMove = Math.abs(touch.down.dist - touch.dist) > 10 || dd(touch.down.x, touch.down.y, touch.x, touch.y) > 10; if (didMove) { touch.state = 'zooming'; } else { touch.state = 'mousing'; touch.button = e.button = 2; recordMouseEvent('mousemove', e, canvas, display, eventQueue, options); recordMouseEvent('mousedown', e, canvas, display, eventQueue, options); } }, 200); break; } } }; canvas.ontouchmove = function(evt) { evt.preventDefault(); var e = touchToMouse(evt); switch (touch.state) { case 'got1stFinger': touch.state = 'mousing'; touch.button = e.button = 0; recordMouseEvent('mousemove', e, canvas, display, eventQueue, options); recordMouseEvent('mousedown', e, canvas, display, eventQueue, options); break; case 'mousing': recordMouseEvent('mousemove', e, canvas, display, eventQueue, options); return; case 'got2ndFinger': if (evt.touches.length > 1) touch.dist = dist(evt.touches[0], evt.touches[1]); return; case 'zooming': zoomMove(evt); return; } }; canvas.ontouchend = function(evt) { evt.preventDefault(); checkFullscreen(); var e = touchToMouse(evt); for (var i = 0; i < evt.changedTouches.length; i++) { switch (touch.state) { case 'mousing': if (evt.touches.length > 0) break; touch.state = 'idle'; recordMouseEvent('mouseup', e, canvas, display, eventQueue, options); return; case 'got1stFinger': touch.state = 'idle'; touch.button = e.button = 0; recordMouseEvent('mousemove', e, canvas, display, eventQueue, options); recordMouseEvent('mousedown', e, canvas, display, eventQueue, options); recordMouseEvent('mouseup', e, canvas, display, eventQueue, options); return; case 'got2ndFinger': touch.state = 'mousing'; touch.button = e.button = 2; recordMouseEvent('mousemove', e, canvas, display, eventQueue, options); recordMouseEvent('mousedown', e, canvas, display, eventQueue, options); break; case 'zooming': if (evt.touches.length > 0) break; touch.state = 'idle'; zoomEnd(evt); return; } } }; canvas.ontouchcancel = function(evt) { canvas.ontouchend(evt); }; // cursorCanvas shows Squeak cursor if (display.cursorCanvas) { var absolute = window.getComputedStyle(canvas).position === "absolute"; display.cursorCanvas.id = "cursorCanvas"; display.cursorCanvas.style.display = "block"; display.cursorCanvas.style.position = absolute ? "absolute": "fixed"; display.cursorCanvas.style.cursor = "none"; display.cursorCanvas.style.background = "transparent"; display.cursorCanvas.style.pointerEvents = "none"; canvas.parentElement.appendChild(display.cursorCanvas); } // wheel stuff document.addEventListener( "mousewheel", function(event) { if (!display.vm) return true; event.preventDefault(); event.stopPropagation(); recordModifiers({ctrlKey: true, metaKey: true}, display); if (event.wheelDeltaY) { if (event.wheelDeltaY < 0) recordKeyboardEvent(31, event.timeStamp, display, eventQueue); else recordKeyboardEvent(30, event.timeStamp, display, eventQueue);}}, {passive: false}); // keyboard stuff document.onkeypress = function(evt) { /* if (canvas.otherCanvasActive) { evt.preventDefault(); evt.stopPropagation(); return true;} if (!display.vm) return true; // check for ctrl-x/c/v/r if (/[CXVR]/.test(String.fromCharCode(evt.charCode + 64))) return true; // let browser handle cut/copy/paste/reload recordModifiers(evt, display); recordKeyboardEvent(evt.charCode, evt.timeStamp, display, eventQueue); evt.preventDefault(); evt.stopPropagation(); */ }; document.onkeydown = function(evt) { checkFullscreen(); if (canvas.otherCanvasActive) { evt.preventDefault(); evt.stopPropagation(); return true;} if (!display.vm) { return true;} if (evt.shiftKey) canvas.shiftKey = true; recordModifiers(evt, display); var squeakCode = ({ 8: 8, // Backspace 9: 9, // Tab 13: 13, // Return 27: 27, // Escape 32: 32, // Space 33: 11, // PageUp 34: 12, // PageDown 35: 4, // End 36: 1, // Home 37: 28, // Left 38: 30, // Up 39: 29, // Right 40: 31, // Down 45: 5, // Insert 46: 127, // Delete })[evt.keyCode]; if (squeakCode) { // special key pressed recordKeyboardEvent(squeakCode, evt.timeStamp, display, eventQueue); evt.stopPropagation(); return evt.preventDefault(); } var key = evt.key; // only supported in FireFox, others have keyIdentifier if (!key && evt.keyIdentifier && evt.keyIdentifier.slice(0,2) == 'U+') key = String.fromCharCode(parseInt(evt.keyIdentifier.slice(2), 16)); var code = key.charCodeAt(0); if (key && key.length == 1) { if (evt.metaKey || evt.altKey || evt.ctrlKey) { if (/[RCXV]/i.test(key)) return true; // let browser handle paste and reload exclusively // if (/[CX]/i.test(key)) { // recordKeyboardEvent(code, evt.timeStamp, display, eventQueue); // return true; // let browser handle cut and copy // } if (/[A-Z]/.test(key) && !evt.shiftKey) code += 32; // make lower-case } } if ((key != 'Control') && (key != 'Shift') && (key != 'Meta') && (key != 'Alt') && (key != 'CapsLock')) { recordKeyboardEvent(code, evt.timeStamp, display, eventQueue); evt.stopPropagation(); return evt.preventDefault();} }; document.onkeyup = function(evt) { if (canvas.otherCanvasActive) { evt.preventDefault(); evt.stopPropagation(); return true;} if (!display.vm) return true; canvas.shiftKey = false; recordModifiers(evt, display); }; document.oncopy = function(evt, key) { var text = display.executeClipboardCopy(key, evt.timeStamp); if (typeof text === 'string') { evt.clipboardData.setData("Text", text); } evt.preventDefault(); }; document.oncut = function(evt) { if (!display.vm) return true; document.oncopy(evt, 'x'); }; document.onpaste = function(evt) { var text = evt.clipboardData.getData('Text'); display.executeClipboardPaste(text, evt.timeStamp); evt.preventDefault(); }; // touch keyboard button if ('ontouchstart' in document) { var keyboardButton = document.createElement('div'); keyboardButton.id = 'keyboardButton'; keyboardButton.innerHTML = ''; keyboardButton.setAttribute('style', 'position:fixed;right:0;bottom:0;background-color:rgba(128,128,128,0.5);border-radius:5px'); canvas.parentElement.appendChild(keyboardButton); keyboardButton.onmousedown = function(evt) { canvas.contentEditable = true; canvas.setAttribute('autocomplete', 'off'); canvas.setAttribute('autocorrect', 'off'); canvas.setAttribute('autocapitalize', 'off'); canvas.setAttribute('spellcheck', 'off'); canvas.focus(); evt.preventDefault(); } keyboardButton.ontouchstart = keyboardButton.onmousedown } // do not use addEventListener, we want to replace any previous drop handler function dragEventHasFiles(evt) { for (var i = 0; i < evt.dataTransfer.types.length; i++) if (evt.dataTransfer.types[i] == 'Files') return true; return false; } document.ondragover = function(evt) { evt.preventDefault(); if (!dragEventHasFiles(evt)) { evt.dataTransfer.dropEffect = 'none'; } else { evt.dataTransfer.dropEffect = 'copy'; recordDragDropEvent(window.Squeak.EventDragMove, evt, canvas, display, eventQueue); } }; document.ondragenter = function(evt) { if (!dragEventHasFiles(evt)) return; recordDragDropEvent(window.Squeak.EventDragEnter, evt, canvas, display, eventQueue); }; document.ondragleave = function(evt) { if (!dragEventHasFiles(evt)) return; recordDragDropEvent(window.Squeak.EventDragLeave, evt, canvas, display, eventQueue); }; document.ondrop = function(evt) { evt.preventDefault(); if (!dragEventHasFiles(evt)) return false; var files = [].slice.call(evt.dataTransfer.files), loaded = [], image, imageName = null; display.droppedFiles = []; files.forEach(function(f) { display.droppedFiles.push(f.name); var reader = new FileReader(); reader.onload = function () { var buffer = this.result; window.Squeak.filePut(f.name, buffer); loaded.push(f.name); if (!image && /.*image$/.test(f.name) && (!display.vm || confirm("Run " + f.name + " now?\n(cancel to use as file)"))) { image = buffer; imageName = f.name; } if (loaded.length == files.length) { if (image) { window.SqueakJS.appName = imageName.slice(0, -6); window.SqueakJS.runImage(image, imageName, display, options); } else { recordDragDropEvent(window.Squeak.EventDragDrop, evt, canvas, display, eventQueue); } } }; reader.readAsArrayBuffer(f); }); return false; }; window.onresize = function() { if (touch.orig) return; // manually resized // call resizeDone only if window size didn't change for 300ms var debounceWidth = window.innerWidth, debounceHeight = window.innerHeight; setTimeout(function() { if (debounceWidth == window.innerWidth && debounceHeight == window.innerHeight) display.resizeDone(); }, 300); // if no fancy layout, don't bother if ((!options.header || !options.footer) && !options.fullscreen) { display.width = canvas.width; display.height = canvas.height; return; } // CSS won't let us do what we want so we will layout the canvas ourselves. var fullscreen = options.fullscreen || display.fullscreen, x = 0, y = fullscreen ? 0 : options.header.offsetTop + options.header.offsetHeight, w = window.innerWidth, h = fullscreen ? window.innerHeight : Math.max(100, options.footer.offsetTop - y), paddingX = 0, // padding outside canvas paddingY = 0; // above are the default values for laying out the canvas if (!options.fixedWidth) { // set canvas resolution if (!options.minWidth) options.minWidth = 700; if (!options.minHeight) options.minHeight = 700; var scaleW = w < options.minWidth ? options.minWidth / w : 1, scaleH = h < options.minHeight ? options.minHeight / h : 1, scale = Math.max(scaleW, scaleH); display.width = Math.floor(w * scale); display.height = Math.floor(h * scale); display.initialScale = w / display.width; } else { // fixed resolution and aspect ratio display.width = options.fixedWidth; display.height = options.fixedHeight; var wantRatio = display.width / display.height, haveRatio = w / h; if (haveRatio > wantRatio) { paddingX = w - Math.floor(h * wantRatio); } else { paddingY = h - Math.floor(w / wantRatio); } display.initialScale = (w - paddingX) / display.width; } // set size and position canvas.style.left = (x + Math.floor(paddingX / 2)) + "px"; canvas.style.top = (y + Math.floor(paddingY / 2)) + "px"; canvas.style.width = (w - paddingX) + "px"; canvas.style.height = (h - paddingY) + "px"; // set resolution if (canvas.width != display.width || canvas.height != display.height) { var preserveScreen = options.fixedWidth || !display.resizeTodo, // preserve unless changing fullscreen imgData = preserveScreen && display.context.getImageData(0, 0, canvas.width, canvas.height); canvas.width = display.width; canvas.height = display.height; if (imgData) display.context.putImageData(imgData, 0, 0); } // set cursor scale if (display.cursorCanvas && options.fixedWidth) { var cursorCanvas = display.cursorCanvas, scale = canvas.offsetWidth / canvas.width; cursorCanvas.style.width = (cursorCanvas.width * scale) + "px"; cursorCanvas.style.height = (cursorCanvas.height * scale) + "px"; } }; window.onresize(); return display; } function setupSpinner(vm, options) { var spinner = options.spinner; if (!spinner) { //debugger; return null;} spinner.onmousedown = function(evt) { if (confirm(window.SqueakJS.appName + " is busy. Interrupt?")) vm.interruptPending = true; }; return spinner.style; } var spinnerAngle = 0, becameBusy = 0; function updateSpinner(spinner, idleMS, vm, display) { var busy = idleMS === 0, animating = vm.lastTick - display.lastTick < 500; if (!busy || animating) { spinner.display = "none"; becameBusy = 0; } else { if (becameBusy === 0) { becameBusy = vm.lastTick; } else if (vm.lastTick - becameBusy > 1000) { spinner.display = "block"; spinnerAngle = (spinnerAngle + 30) % 360; spinner.webkitTransform = spinner.transform = "rotate(" + spinnerAngle + "deg)"; } } } ////////////////////////////////////////////////////////////////////////////// // main loop ////////////////////////////////////////////////////////////////////////////// var loop; // holds timeout for main loop window.SqueakJS.runImage = function(buffer, name, display, options) { window.onbeforeunload = function(evt) { var msg = window.SqueakJS.appName + " is still running"; evt.returnValue = msg; return msg; }; window.clearTimeout(loop); display.reset(); display.clear(); display.showBanner("loading app '" + window.SqueakJS.appName + "'..."); display.showProgress(0); var self = this; window.setTimeout(function readImageAsync() { var image = new window.Squeak.Image(name); image.window = window; image.readFromBuffer(buffer, function startRunning() { display.quitFlag = false; var vm = new window.Squeak.Interpreter(image, display); window.SqueakJS.vm = vm; localStorage["squeakImageName"] = name; setupSwapButtons(options); display.clear(); display.showBanner("starting app '" + window.SqueakJS.appName + "'..."); var spinner = setupSpinner(vm, options); function run() { try { if (display.quitFlag) self.onQuit(vm, display, options); else if (!(display.suspend)) { vm.interpret(50, function runAgain(ms) { if (ms == "sleep") ms = 200; if (spinner) updateSpinner(spinner, ms, vm, display); loop = window.setTimeout(run, ms); })}; } catch(error) { console.error(error); // alert(error); //debugger; loop = window.setTimeout(run, 200); } } display.runNow = function() { window.clearTimeout(loop); run(); }; display.runFor = function(milliseconds) { var stoptime = Date.now() + milliseconds; do { if (display.quitFlag) return; display.runNow(); } while (Date.now() < stoptime); }; run(); }, function readProgress(value) {display.showProgress(value);}); }, 0); }; function processOptions(options) { var search = (location.hash || location.search).slice(1), args = search && search.split("&"); if (args) for (var i = 0; i < args.length; i++) { var keyAndVal = args[i].split("="), key = keyAndVal[0], val = true; if (keyAndVal.length > 1) { val = decodeURIComponent(keyAndVal.slice(1).join("=")); if (val.match(/^(true|false|null|[0-9"[{].*)$/)) try { val = JSON.parse(val); } catch(e) { if (val[0] === "[") val = val.slice(1,-1).split(","); // handle string arrays // if not JSON use string itself } } options[key] = val; } var root = window.Squeak.splitFilePath(options.root || "/").fullname; window.Squeak.dirCreate(root, true); if (!/\/$/.test(root)) root += "/"; options.root = root; window.SqueakJS.options = options; } function fetchTemplates(options) { if (options.templates) { if (options.templates.constructor === Array) { var templates = {}; options.templates.forEach(function(path){ templates[path] = path; }); options.templates = templates; } for (var path in options.templates) { var dir = path[0] == "/" ? path : options.root + path, url = window.Squeak.splitUrl(options.templates[path], options.url).full; window.Squeak.fetchTemplateDir(dir, url); } } } function processFile(file, display, options, thenDo) { window.Squeak.filePut(options.root + file.name, file.data, function() { console.log("Stored " + options.root + file.name); if (file.zip) { processZip(file, display, options, thenDo); } else { thenDo(); } }); } function processZip(file, display, options, thenDo) { window.JSZip().loadAsync(file.data).then(function(zip) { var todo = []; zip.forEach(function(filename){ if (!options.image.name && filename.match(/\.image$/)) options.image.name = filename; if (options.forceDownload || !window.Squeak.fileExists(options.root + filename)) { todo.push(filename); } else if (options.image.name === filename) { // image exists, need to fetch it from storage var _thenDo = thenDo; thenDo = function() { window.Squeak.fileGet(options.root + filename, function(data) { options.image.data = data; return _thenDo(); }, function onError() { window.Squeak.fileDelete(options.root + file.name); return processZip(file, display, options, _thenDo); }); } } }); if (todo.length === 0) return thenDo(); var done = 0; display.showBanner("unzipping " + file.name); display.showProgress(0); todo.forEach(function(filename){ console.log("Inflating " + file.name + ": " + filename); function progress(x) { display.showProgress((x.percent / 100 + done) / todo.length); } zip.file(filename).async("arraybuffer", progress).then(function(buffer){ console.log("Expanded size of " + filename + ": " + buffer.byteLength); var unzipped = {}; if (options.image.name === filename) unzipped = options.image; unzipped.name = filename; unzipped.data = buffer; processFile(unzipped, display, options, function() { if (++done === todo.length) thenDo(); }); }); }); }); } function checkExisting(file, display, options, ifExists, ifNotExists) { if (!window.Squeak.fileExists(options.root + file.name)) return ifNotExists(); if (file.image || file.zip) { // if it's the image or a zip, load from file storage window.Squeak.fileGet(options.root + file.name, function(data) { file.data = data; if (file.zip) processZip(file, display, options, ifExists); else ifExists(); }, function onError() { // if error, download it window.Squeak.fileDelete(options.root + file.name); return ifNotExists(); }); } else { // for all other files assume they're okay ifExists(); } } function downloadFile(file, display, options, thenDo) { display.showBanner("downloading " + file.name + "..."); var rq = new XMLHttpRequest(), proxy = options.proxy || ""; rq.open('GET', proxy + file.url); if (options.ajax) rq.setRequestHeader("X-Requested-With", "XMLHttpRequest"); rq.responseType = 'arraybuffer'; rq.onprogress = function(e) { if (e.lengthComputable) display.showProgress(e.loaded / e.total); }; rq.onload = function(e) { if (this.status == 200) { file.data = this.response; processFile(file, display, options, thenDo); } else this.onerror(this.statusText); }; rq.onerror = function(e) { if (options.proxy) return alert("Failed to download:\n" + file.url); console.warn('Retrying with CORS proxy: ' + file.url); var proxy = 'https://crossorigin.me/', retry = new XMLHttpRequest(); retry.open('GET', proxy + file.url); if (options.ajax) retry.setRequestHeader("X-Requested-With", "XMLHttpRequest"); retry.responseType = rq.responseType; retry.onprogress = rq.onprogress; retry.onload = rq.onload; retry.onerror = function() {alert("Failed to download:\n" + file.url)}; retry.send(); }; rq.send(); } function fetchFiles(files, display, options, thenDo) { // check if files exist locally and download if nessecary function getNextFile() { if (files.length === 0) return thenDo(); var file = files.shift(), forceDownload = options.forceDownload || file.forceDownload; if (forceDownload) downloadFile(file, display, options, getNextFile); else checkExisting(file, display, options, function ifExists() { getNextFile(); }, function ifNotExists() { downloadFile(file, display, options, getNextFile); }); } getNextFile(); } window.SqueakJS.runSqueak = function(imageUrl, canvas, options) { // we need to fetch all files first, then run the image processOptions(options); if (!imageUrl && options.image) imageUrl = options.image; var baseUrl = options.url || (imageUrl && imageUrl.replace(/[^\/]*$/, "")) || ""; options.url = baseUrl; fetchTemplates(options); var display = createSqueakDisplay(canvas, options), image = {url: null, name: null, image: true, data: null}, files = []; display.argv = options.argv; if (imageUrl) { var url = window.Squeak.splitUrl(imageUrl, baseUrl); image.url = url.full; image.name = url.filename; } if (options.files) { options.files.forEach(function(f) { var url = window.Squeak.splitUrl(f, baseUrl); if (image.name === url.filename) {/* pushed after other files */} else if (!image.url && f.match(/\.image$/)) { image.name = url.filename; image.url = url.full; } else { files.push({url: url.full, name: url.filename}); } }); } if (!window.Squeak.fileExists(options.root + image.name)) { // If the image file exists, assume there's no need to check the zips. if (options.zip) { var zips = typeof options.zip === "string" ? [options.zip] : options.zip; zips.forEach(function(zip) { var url = window.Squeak.splitUrl(zip, baseUrl); files.push({url: url.full, name: url.filename, zip: true}); }); }} if (image.url) files.push(image); if (options.document) { var url = window.Squeak.splitUrl(options.document, baseUrl); files.push({url: url.full, name: url.filename, forceDownload: options.forceDownload !== false}); display.documentName = options.root + url.filename; } options.image = image; fetchFiles(files, display, options, function thenDo() { window.Squeak.fsck(); var image = options.image; if (!image.name) return console.log("could not find an image"); if (!image.data) { console.log("could not find image " + image.name); document.location.reload(); return} window.SqueakJS.appName = options.appName || image.name.replace(/\.image$/, ""); window.SqueakJS.runImage(image.data, options.root + image.name, display, options); }); return display; }; window.SqueakJS.quitSqueak = function() { window.SqueakJS.vm.quitFlag = true; }; window.SqueakJS.onQuit = function(vm, display, options) { window.onbeforeunload = null; display.vm = null; if (options.spinner) options.spinner.style.display = "none"; if (options.onQuit) options.onQuit(vm, display, options); else display.showBanner(window.SqueakJS.appName + " stopped."); }; }); // end module ////////////////////////////////////////////////////////////////////////////// // browser stuff ////////////////////////////////////////////////////////////////////////////// if (window.applicationCache) { window.applicationCache.addEventListener('updateready', function() { // use original appName from options var appName = window.SqueakJS && window.SqueakJS.options && window.SqueakJS.options.appName || "SqueakJS"; if (confirm(appName + ' has been updated. Restart now?')) { window.onbeforeunload = null; window.location.reload(); } }); } window.startCaffeine = function(canvas, imageName, sourcesName, parameters) { var squeakDisplay, spinner; window.canvas = canvas; spinner = window.document.getElementById("sqSpinner"); squeakDisplay = window.SqueakJS.runSqueak( imageName + ".image", canvas, { zip: [ "https://california.demo.blackpagedigital.com/caffeine/memories/" + imageName + ".zip", "https://california.demo.blackpagedigital.com/caffeine/sources/" + sourcesName + ".sources.zip"], swapButtons: true, spinner: spinner, cursor: false, appName: parameters.appName, parameters: parameters}); window.squeakDisplay = squeakDisplay; setTimeout( function() { window.Squeak.fsck(function(stats) {});}, 0); return false;}} 31:[] 2e:{"id":"3e2e85b2be3a5982","slug":"caffeine","title":"Caffeine","thumbnail":"171e4d55b2fe48e295eb20f563365073eef633725144f3be713114929d2fd70a","access_level":"public","create_time":"$D2019-10-17T20:07:01.704Z","update_time":"$D2022-06-23T09:51:41.174Z","view_time":null,"first_public_time":"$D2019-10-18T16:12:20.043Z","has_unpublished_edits":null,"fork":false,"stars":3,"starred":false,"owner":{"type":"team","id":"f89a11b6c731864d","login":"ccrraaiigg","name":"Craig Latta","avatar_url":"https://avatars-next.observableusercontent.com/7a77092454fc152df24638b5221495108ddcbc91b61a843ce7ec80945bfaeea0","tier":"starter_2024"},"version":466,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"33a82ed708c70bb4","login":"ccrraaiigg","name":"Craig Latta","avatar_url":"https://avatars-next.observableusercontent.com/7a77092454fc152df24638b5221495108ddcbc91b61a843ce7ec80945bfaeea0","tier":null}],"members":[{"type":"individual","id":"33a82ed708c70bb4","login":"ccrraaiigg","name":"Craig Latta","avatar_url":"https://avatars-next.observableusercontent.com/7a77092454fc152df24638b5221495108ddcbc91b61a843ce7ec80945bfaeea0","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":true,"trashed":false,"lapsed":null,"subscribed":null,"forks":3,"collection":{"id":"c581a32e78447134","slug":"caffeine","title":"Caffeine","owner":{"id":"f89a11b6c731864d","login":"ccrraaiigg","name":"Craig Latta"}},"type":"notebook","body":{"titling":"auto","title":"Caffeine","cells":[{"id":0,"value":"md`# Caffeine\nCaffeine integrates SqueakJS, a JavaScript implementation of the Squeak Smalltalk virtual machine, with several JavaScript runtime environments, including web frontends (web browsers, with DOM, DevTools, and Observable integration), backends (NodeJS), and Web Workers.`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":275,"value":"window.canvas = html`