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Adds heart.system namespace functions, corresponding to love.system #14

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Adds heart.system namespace functions, corresponding to love.system #14

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50 changes: 50 additions & 0 deletions examples/system.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,50 @@
<html>
<head>
<title>heart.js test</title>
<script src="../heart.js"></script>
<script>
/* Shows a white square traveling to the bottom-right of the screen at 10 Hz. */

var square = {x: 50, y: 50, speed: 10};

heart.load = function() {
heart.attach("cnv");
}

heart.update = function(dt) {
square.x += square.speed * dt;
square.y += square.speed * dt;
}

heart.keypressed = function(key) {
console.log(key);
if (key === 's') {
heart.system.setClipboardText(JSON.stringify({x: square.x, y: square.y}));
} else if (key === 'l') {
var load = JSON.parse(heart.system.getClipboardText());
square.x = load.x; square.y = load.y;
}
}

heart.draw = function() {
heart.graphics.setColor(255, 255, 255)
heart.graphics.rectangle("fill", square.x, square.y, 100, 100);

heart.graphics.setColor(255, 255, 0);
heart.graphics.print("fps: " + heart.timer.getFPS(), 10, 10);
heart.graphics.print("os: " + heart.system.getOS(), 10, 20);

var b = heart.system.getPowerInfo();
if (b.state !== "unknown") {
heart.graphics.print("battery level: "+b.percent+"%", 10, 30);
}
}

</script>
</head>
<body>

<canvas id="cnv" width="800" height="600">your browser doesn't support &lt;canvas&gt;</canvas>

</body>
</html>
52 changes: 52 additions & 0 deletions heart.js
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Original file line number Diff line number Diff line change
Expand Up @@ -180,6 +180,58 @@ heart.mouse = {
}
};

heart.system = {
// JavaScript is not permitted to access the clipboard in most browsers. We
// can use a backdoor in IE, but for other browsers we just use
// window.prompt() to make the user do it manually.
getClipboardText: function() {
if (typeof window.clipboardData !== "undefined") {
return window.clipboardData.getData('Text');
} else {
return window.prompt("Please paste from clipboard:");
}
},
getOS: function() {
var agent = window.navigator.userAgent;
if (agent.match(/Windows/)) {
return "Windows";
} else if (agent.match(/Mac/)) {
return "OS X";
} else if (agent.match(/X11|Linux/)) {
return "Linux";
}
},
getPowerInfo: function() {
if (typeof window.navigator.battery !== 'undefined') {
var b = window.navigator.battery, state;
if (b.charging) {
state = 'charging';
} else if (b.level === 1) {
state = 'charged';
} else {
state = 'battery';
}
return {
state: state,
percent: b.level*100,
seconds: b.dischargingTime,
};
} else {
return { state: 'unknown' };
}
},
// no implementation of heart.system.getProcessorCount() yet!
// this might be done using an extra library:
// https://github.com/oftn/core-estimator
setClipboardText: function(text) {
if (typeof window.clipboardData !== "undefined") {
window.clipboardData.setData('Text', text);
} else {
window.prompt("Please copy to clipboard:", text);
}
}
};

heart._init = function() {
/* if we're waiting on images to load, spinlock */
if(heart._imagesLoading.length !== 0) {
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