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feat: add custom CEF V8 extensions support (#17)

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* feat: Register extensions in render process

- Add CefExtensions type to hold V8 extension code
- Pass extensions through BrowserProcessAppBuilder
- Register extensions in RenderProcessHandler on WebKit initialization
- Decode JSON extensions from command line switch
- Prefix extension names with "v8/" per CEF convention
- Include actual JSON in error messages for debugging

l

* feat: refactor window.cef API and register as CEF extension

* fix: remove debug print statements in render process handler

* refactor: centralize EXTENSIONS_SWITCH constant in util.rs

* fmt

* refactor: implement Default trait for CefApiHandler

* docs: add documentation for CefApiHandler and its JavaScript API functions

---------

Co-authored-by: not-elm <elmgameinfo@gmail.com>
This commit is contained in:
elm
2026-02-04 16:08:32 +09:00
committed by GitHub
parent b7900a24a0
commit 519aa2b2bf
21 changed files with 473 additions and 454 deletions
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39
assets/extensions.html Normal file
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@@ -0,0 +1,39 @@
<!DOCTYPE html>
<html>
<head>
<title>CEF Extensions Example</title>
<style>
body { font-family: sans-serif; padding: 20px; background: #1a1a2e; color: #eee; }
button { padding: 10px 20px; margin: 5px; cursor: pointer; }
#output { margin-top: 20px; padding: 10px; background: #16213e; border-radius: 5px; }
</style>
</head>
<body>
<h1>CEF Extensions Example</h1>
<p>Testing custom JavaScript extensions registered via register_extension.</p>
<button onclick="testExtension()">Test myGame.sendScore()</button>
<button onclick="checkVersion()">Check Version</button>
<div id="output">Output will appear here...</div>
<script>
function testExtension() {
if (typeof myGame !== 'undefined') {
myGame.sendScore(Math.floor(Math.random() * 100));
document.getElementById('output').innerHTML = 'Score sent! Check Bevy console.';
} else {
document.getElementById('output').innerHTML = 'Error: myGame extension not found';
}
}
function checkVersion() {
if (typeof myGame !== 'undefined' && myGame.version) {
document.getElementById('output').innerHTML = 'myGame version: ' + myGame.version;
} else {
document.getElementById('output').innerHTML = 'Error: myGame.version not found';
}
}
</script>
</body>
</html>

2
assets/host_emit.html
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@@ -15,7 +15,7 @@
<h1 id="count" style="color: aqua">0</h1>
<script>
const count = document.getElementById("count");
window.cef.listen("count", (payload) => {
cef.listen("count", (payload) => {
count.innerText = payload;
})
</script>

2
assets/js_emit.html
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@@ -17,7 +17,7 @@
let count = 0;
window.setInterval(() => {
console.log("Emitting count:", count);
window.cef.emit({
cef.emit({
count,
});
countElement.innerText = count;