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Harness: add input event processing
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@codefrau
codefrau committed Sep 4, 2014
1 parent 96d7dba commit b8e6966
Showing 1 changed file with 103 additions and 16 deletions.
119 changes: 103 additions & 16 deletions lib/squeak.js
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Original file line number Diff line number Diff line change
Expand Up @@ -112,25 +112,111 @@ function setupFullscreen(display, canvas, options) {
}
}

function recordMouseEvent(what, evt, canvas, display, eventQueue, options) {
var x = (evt.pageX - canvas.offsetLeft) * (canvas.width / canvas.offsetWidth);
y = (evt.pageY - canvas.offsetTop) * (canvas.height / canvas.offsetHeight);
// subtract display offset and clamp to display size
display.mouseX = Math.max(0, Math.min(display.width, x - display.offsetX));
display.mouseY = Math.max(0, Math.min(display.height, y - display.offsetY));
var buttons = display.buttons & Squeak.Mouse_All;
switch (what) {
case 'move':
break; // nothing more to do
case 'up':
buttons = 0;
break;
case 'down':
switch (evt.button) {
case 0: buttons = Squeak.Mouse_Red; break; // left
case 1: buttons = Squeak.Mouse_Yellow; break; // middle
case 2: buttons = Squeak.Mouse_Blue; break; // right
};
if (options.swapButtons)
if (buttons == Squeak.Mouse_Yellow) buttons = Squeak.Mouse_Blue;
else if (buttons == Squeak.Mouse_Blue) buttons = Squeak.Mouse_Yellow;
break;
}
buttons +=
(evt.shiftKey ? Squeak.Keyboard_Shift : 0) +
(evt.ctrlKey ? Squeak.Keyboard_Ctrl : 0) +
(evt.altKey || evt.metaKey ? Squeak.Keyboard_Cmd : 0);
display.buttons = buttons;
if (eventQueue) {
eventQueue.push([
Squeak.EventTypeMouse,
evt.timeStamp, // converted to Squeak time in makeSqueakEvent()
display.mouseX,
display.mouseY,
display.buttons & Squeak.Mouse_All,
display.buttons >> 3,
]);
if (display.signalInputEvent)
display.signalInputEvent();
}
}

function recordKeyboardEvent(key, timestamp, display, eventQueue) {
var code = (display.buttons >> 3) << 8 | key;
if (code === display.vm.interruptKeycode) {
display.vm.interruptPending = true;
} else if (eventQueue) {
eventQueue.push([
Squeak.EventTypeKeyboard,
timestamp, // converted to Squeak time in makeSqueakEvent()
key, // MacRoman
Squeak.EventKeyChar,
display.buttons >> 3,
0, // Unicode
]);
if (display.signalInputEvent)
display.signalInputEvent();
} else {
// no event queue, queue keys the old-fashioned way
display.keys.push(code);
}
}

function makeSqueakEvent(evt, sqEvtBuf, sqTimeOffset) {
sqEvtBuf[0] = evt[0];
sqEvtBuf[1] = (evt[1] - sqTimeOffset) & Squeak.MillisecondClockMask;
for (var i = 2; i < evt.length; i++)
sqEvtBuf[i] = evt[i];
}

function createSqueakDisplay(canvas, options) {
options = options || {};
var eventQueue = null;
var display = {
context: canvas.getContext("2d"),
fullscreen: false,
offsetX: 0,
offsetY: 0,
width: -1,
height: -1,
mouseX: 0,
mouseY: 0,
buttons: 0,
keys: [],
clipboardString: '',
clipboardStringChanged: false,
signalInputEvent: null, // function set by VM
getNextEvent: function firstTime(firstEvtBuf, firstOffset) {
eventQueue = [];
display.getNextEvent = function getNextEvent(evtBuf, timeOffset) {
var evt = eventQueue.shift();
if (evt) makeSqueakEvent(evt, evtBuf, timeOffset);
else evtBuf[0] = Squeak.EventTypeNone;
};
display.getNextEvent(firstEvtBuf, firstOffset);
},
};
var checkFullscreen = setupFullscreen(display, canvas);
var checkFullscreen = setupFullscreen(display, canvas, options);
display.clear = function() {
canvas.width = canvas.width;
};
display.showBanner = function(msg, style) {
style = style || {};
var ctx = canvas.getContext("2d");
var ctx = display.context;
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = style.color || "#F90";
ctx.font = style.font || 'bold 48px sans-serif';
Expand All @@ -156,60 +242,61 @@ function createSqueakDisplay(canvas, options) {
canvas.onmousedown = function(evt) {
checkFullscreen();
canvas.focus();
var button = (options.swapButtons ? [4, 1, 2] : [4, 2, 1])[evt.button];
display.buttons = display.buttons & ~7 | button;
recordMouseEvent('down', evt, canvas, display, eventQueue, options);
display.vm.interpret(100);
evt.preventDefault();
return false;
};
canvas.onmouseup = function(evt) {
recordMouseEvent('up', evt, canvas, display, eventQueue, options);
display.vm.interpret(100);
checkFullscreen();
display.buttons = display.buttons & ~7;
evt.preventDefault();
};
canvas.onmousemove = function(evt) {
// scale events to actual canvas extent
display.mouseX = (evt.pageX - this.offsetLeft) * (this.width / this.offsetWidth);
display.mouseY = (evt.pageY - this.offsetTop) * (this.height / this.offsetHeight);
recordMouseEvent('move', evt, canvas, display, eventQueue, options);
evt.preventDefault();
};
canvas.oncontextmenu = function() {
return false;
};
canvas.ontouchstart = function(evt) {
canvas.focus();
display.buttons = 4;
canvas.ontouchmove(evt);
};
canvas.ontouchmove = function(evt) {
canvas.onmousemove(evt.touches[0]);
};
canvas.ontouchend = function(evt) {
display.buttons = 0;
canvas.ontouchmove(evt);
};
canvas.ontouchcancel = function(evt) {
display.buttons = 0;
};
canvas.onkeypress = function(evt) {
display.keys.push(evt.charCode);
recordKeyboardEvent(evt.charCode, evt.timeStamp, display, eventQueue);
evt.preventDefault();
};
canvas.onkeydown = function(evt) {
checkFullscreen();
var code = ({46:127, 8:8, 45:5, 9:9, 13:13, 27:27, 36:1, 35:4,
33:11, 34:12, 37:28, 39:29, 38:30, 40:31})[evt.keyCode];
if (code) {display.keys.push(code); return evt.preventDefault()};
if (code) { // special key pressed
recordKeyboardEvent(code, evt.timeStamp, display, eventQueue);
return evt.preventDefault();
}
var modifier = ({16:8, 17:16, 91:64, 18:64})[evt.keyCode];
if (modifier) {
if (modifier) { // modifier pressed
display.buttons |= modifier;
if (modifier > 8) display.keys = [];
if (modifier > 8) // special
display.keys = []; // flush queued key presses
return evt.preventDefault();
}
if ((evt.metaKey || evt.altKey) && evt.which) {
code = evt.which;
if (code >= 65 && code <= 90) if (!evt.shiftKey) code += 32;
else if (evt.keyIdentifier && evt.keyIdentifier.slice(0,2) == 'U+')
code = parseInt(evt.keyIdentifier.slice(2), 16);
display.keys.push(code)
recordKeyboardEvent(code, evt.timeStamp, display, eventQueue);
return evt.preventDefault();
}
};
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