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[BUGFIX] Fix iFrame focus lost #44

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[BUGFIX] Fix iFrame focus lost #44

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40 changes: 40 additions & 0 deletions src/lime/_internal/backend/html5/HTML5Application.hx
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Original file line number Diff line number Diff line change
Expand Up @@ -277,6 +277,24 @@ class HTML5Application
Browser.window.addEventListener("blur", handleWindowEvent, false);
Browser.window.addEventListener("resize", handleWindowEvent, false);
Browser.window.addEventListener("beforeunload", handleWindowEvent, false);
Browser.window.addEventListener("canvasVisibilityChange", handleWindowEvent, false);

untyped #if haxe4 js.Syntax.code #else __js__ #end ("
var canvas = document.querySelector('canvas');
if (canvas && 'IntersectionObserver' in window) {
var observer = new IntersectionObserver(function(entries) {
var visible = entries[0].isIntersecting;

// idk if js has a event for what i want but that works for now
var event = new CustomEvent('canvasVisibilityChange', {
detail: { visible: visible }
});

window.dispatchEvent(event);
});
observer.observe(canvas);
}
");

if (Reflect.hasField(Browser.window, "Accelerometer"))
{
Expand Down Expand Up @@ -442,6 +460,7 @@ class HTML5Application
accelerometer.onUpdate.dispatch(event.accelerationIncludingGravity.x, event.accelerationIncludingGravity.y, event.accelerationIncludingGravity.z);
}

@:keep
private function handleWindowEvent(event:js.html.Event):Void
{
if (parent.window != null)
Expand All @@ -464,6 +483,27 @@ class HTML5Application
hidden = true;
}

case 'canvasVisibilityChange':
var e:js.html.CustomEvent = cast event;
if (!e.detail.visible)
{
if (!hidden)
{
parent.window.onFocusOut.dispatch();
parent.window.onDeactivate.dispatch();
hidden = true;
}
}
else
{
if (hidden)
{
parent.window.onFocusIn.dispatch();
parent.window.onActivate.dispatch();
hidden = false;
}
}

case "visibilitychange":
if (Browser.document.hidden)
{
Expand Down