It seems that at the current state it is necessary to protect sending stats/ending game from multiple execution,
as that can happen if you e.g. fail a mission more than once in the same tick (e.g. destroying two essential crates at the same time)
Otherwise you can get a blank / stuck frontend (e.g. when using deagle to shoot the two last crates at the same time)!
the best approach might be to never call the function that sends stats and ends game from any event handler directly, but instead have a flag 'isFailed' that is set to true when any of the possible fails happen and to check that flag every tick to send stats and end game if true
<!doctype html>
<html>
<head>
<title>Hedgewars Theme Editor</title>
<script type="text/javascript">
var sky, clouds, horizont, water, land, border;
var skyColor, waterTopColor, waterBottomColor;
var elements = 7;
var landArray;
function landFunction(x){
return 384 - 192 * Math.sin(x * Math.PI/512);
}
function tryToDraw(){
if (--elements <= 0) {
draw();
}
}
function load(){
var canvas = document.getElementById('preview');
if (canvas.getContext){
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#0b294b';
ctx.fillRect(0, 0, 512, 384);
ctx.font = "40pt Arial";
ctx.fillStyle = '#2b7bd5';
ctx.fillText('Loading Images...', 32, 212);
}
sky = new Image();
sky.onload = tryToDraw;
sky.src = 'http://hedgewars.googlecode.com/hg/share/hedgewars/Data/Themes/Nature/Sky.png';
clouds = new Image();
clouds.onload = tryToDraw;
clouds.src = 'http://hedgewars.googlecode.com/hg/share/hedgewars/Data/Graphics/Clouds.png';
horizont = new Image();
horizont.onload = tryToDraw;
horizont.src = 'http://hedgewars.googlecode.com/hg/share/hedgewars/Data/Themes/Nature/horizont.png';
land = new Image();
land.onload = tryToDraw;
land.src = 'http://hedgewars.googlecode.com/hg/share/hedgewars/Data/Themes/Nature/LandTex.png';
border = new Image();
border.onload = tryToDraw;
border.src = 'http://hedgewars.googlecode.com/hg/share/hedgewars/Data/Themes/Nature/Border.png';
water = new Image();
water.onload = tryToDraw;
water.src = 'http://hedgewars.googlecode.com/hg/share/hedgewars/Data/Graphics/BlueWater.png';
landArray = new Array(512);
for (var x = 0; x < landArray.length; x++)
landArray[x] = landFunction(x);
skyColor = '#131252';
document.getElementById('skyColor').value = skyColor;
waterTopColor = '#555C9D';
document.getElementById('waterTopColor').value = waterTopColor;
waterBottomColor = '#343C7D';
document.getElementById('waterBottomColor').value = waterBottomColor;
tryToDraw();
}
function draw(){
var canvas = document.getElementById('preview');
if (canvas.getContext){
var ctx = canvas.getContext('2d');
ctx.fillStyle = skyColor;
ctx.fillRect(0, 0, 512, 384);
ctx.drawImage(sky, 0, 64, 512, 256);
for (var i = 0; i < 4; i++)
ctx.drawImage(clouds, 0, i * 128, 256, 128, i * 128, 64, 128, 64);
ctx.drawImage(horizont, 0, 192, 512, 128);
ctx.save();
ctx.beginPath();
ctx.moveTo(0, 384);
for (var x = 0; x < landArray.length; x++)
ctx.lineTo(x, landArray[x]);
ctx.clip();
for (var i = 0; i < 2; i++)
for (var k = 0; k < 2; k++)
ctx.drawImage(land, i * 320, k * 240, 320, 240);
ctx.restore();
var k = 0;
for (var x = 0; x < landArray.length; x++) {
if (++k == 64)
k = 0;
ctx.drawImage(border, k, 0, 2, 16, x, landArray[x] - 4, 1, 8);
}
var gradient = ctx.createLinearGradient(0, 320, 0, 384);
gradient.addColorStop(0, waterTopColor);
gradient.addColorStop(1, waterBottomColor);
ctx.fillStyle = gradient;
ctx.fillRect(0, 320, 512, 384);
for (var i = 0; i < 8; i++)
ctx.drawImage(water, i * 64, 308, 64, 24);
}
}
</script>
<style type="text/css">
canvas { border: 1px solid black; }
</style>
</head>
<body onload="load();">
<h1>Hedgewars Theme editor</h1>
<canvas id="preview" width="512" height="384">Sorry, your browser does not support Canvas.</canvas><br>
<table>
<tr><td>Sky:</td><td>
<input id="sky" type="file" accept="image/png" onchange="sky.src = window.URL.createObjectURL(this.files[0])"></input>
</td></tr>
<tr><td>Sky Color:</td><td>
<input id="skyColor" type="color" onchange="skyColor = this.value; draw()"></input>
</td></tr>
<tr><td>Clouds:</td><td>
<input id="clouds" type="file" accept="image/png" onchange="clouds.src = window.URL.createObjectURL(this.files[0])"></input>
</td></tr>
<tr><td>Horizont:</td><td>
<input id="horizont" type="file" accept="image/png" onchange="horizont.src = window.URL.createObjectURL(this.files[0])"></input>
</td></tr>
<tr><td>Land:</td><td>
<input id="land" type="file" accept="image/png" onchange="land.src = window.URL.createObjectURL(this.files[0])"></input>
</td></tr>
<tr><td>Border:</td><td>
<input id="border" type="file" accept="image/png" onchange="border.src = window.URL.createObjectURL(this.files[0])"></input>
</td></tr>
<tr><td>Water:</td><td>
<input id="water" type="file" accept="image/png" onchange="water.src = window.URL.createObjectURL(this.files[0])"></input>
</td></tr>
<tr><td>Water Top Color:</td><td>
<input id="waterTopColor" type="color" onchange="waterTopColor = this.value; draw()"></input>
</td></tr>
<tr><td>Water Bottom Color:</td><td>
<input id="waterBottomColor" type="color" onchange="waterBottomColor = this.value; draw()"></input>
</td></tr>
</table>
</body>
</html>