migrations/egui
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eframe web: detect and report panics during startup (#2992)

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* Detect panics during initialization and show them to the user

* PanicHandler now also logs the panics

* Add example of how to call into your app from JS

* Refactor: break out AppRunner and AppRunnerRef to own files

* Hide AppRunner

* Simplify user code

* AppRunnerRef -> WebRunner

* Better docs

* Don't paint until first animation frame

* Update multiple_apps.html

* Update web demo

* Cleanup and fixes

* left-align panic message in html
This commit is contained in:
Emil Ernerfeldt
2023-05-16 22:22:09 +02:00
committed by GitHub
parent ff8e4826b3
commit ea71b7f20b
15 changed files with 791 additions and 716 deletions
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83
docs/egui_demo_app.js
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@@ -280,7 +280,7 @@ function handleError(f, args) {
wasm.__wbindgen_exn_store(addHeapObject(e));
}
}
function __wbg_adapter_584(arg0, arg1, arg2, arg3) {
function __wbg_adapter_580(arg0, arg1, arg2, arg3) {
wasm.wasm_bindgen__convert__closures__invoke2_mut__h125af29ab38d9781(arg0, arg1, addHeapObject(arg2), addHeapObject(arg3));
}
@@ -308,16 +308,21 @@ class WebHandle {
wasm.__wbg_webhandle_free(ptr);
}
/**
* This is the entry-point for all the web-assembly.
*
* This is called once from the HTML.
* It loads the app, installs some callbacks, then returns.
* @param {string} canvas_id
* Installs a panic hook, then returns.
*/
constructor(canvas_id) {
constructor() {
const ret = wasm.webhandle_new();
return WebHandle.__wrap(ret);
}
/**
* Call this once from JavaScript to start your app.
* @param {string} canvas_id
* @returns {Promise<void>}
*/
start(canvas_id) {
const ptr0 = passStringToWasm0(canvas_id, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
const len0 = WASM_VECTOR_LEN;
const ret = wasm.webhandle_new(ptr0, len0);
const ret = wasm.webhandle_start(this.ptr, ptr0, len0);
return takeObject(ret);
}
/**
@@ -326,6 +331,13 @@ class WebHandle {
wasm.webhandle_destroy(this.ptr);
}
/**
* Example on how to call into your app from JavaScript.
*/
example() {
wasm.webhandle_example(this.ptr);
}
/**
* The JavaScript can check wether or not your app has crashed:
* @returns {boolean}
*/
has_panicked() {
@@ -407,10 +419,6 @@ async function load(module, imports) {
function getImports() {
const imports = {};
imports.wbg = {};
imports.wbg.__wbg_webhandle_new = function(arg0) {
const ret = WebHandle.__wrap(arg0);
return addHeapObject(ret);
};
imports.wbg.__wbindgen_object_drop_ref = function(arg0) {
takeObject(arg0);
};
@@ -427,24 +435,6 @@ function getImports() {
const ret = getStringFromWasm0(arg0, arg1);
return addHeapObject(ret);
};
imports.wbg.__wbg_new_abda76e883ba8a5f = function() {
const ret = new Error();
return addHeapObject(ret);
};
imports.wbg.__wbg_stack_658279fe44541cf6 = function(arg0, arg1) {
const ret = getObject(arg1).stack;
const ptr0 = passStringToWasm0(ret, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
const len0 = WASM_VECTOR_LEN;
getInt32Memory0()[arg0 / 4 + 1] = len0;
getInt32Memory0()[arg0 / 4 + 0] = ptr0;
};
imports.wbg.__wbg_error_f851667af71bcfc6 = function(arg0, arg1) {
try {
console.error(getStringFromWasm0(arg0, arg1));
} finally {
wasm.__wbindgen_free(arg0, arg1);
}
};
imports.wbg.__wbindgen_string_get = function(arg0, arg1) {
const obj = getObject(arg1);
const ret = typeof(obj) === 'string' ? obj : undefined;
@@ -471,6 +461,13 @@ function getImports() {
imports.wbg.__wbg_warn_8b4e19d4032139f0 = function(arg0, arg1) {
console.warn(getStringFromWasm0(arg0, arg1));
};
imports.wbg.__wbg_error_e62b64b85c2bc545 = function(arg0, arg1) {
try {
console.error(getStringFromWasm0(arg0, arg1));
} finally {
wasm.__wbindgen_free(arg0, arg1);
}
};
imports.wbg.__wbg_new_40620131643ca1cf = function() {
const ret = new Error();
return addHeapObject(ret);
@@ -1573,7 +1570,7 @@ function getImports() {
const a = state0.a;
state0.a = 0;
try {
return __wbg_adapter_584(a, state0.b, arg0, arg1);
return __wbg_adapter_580(a, state0.b, arg0, arg1);
} finally {
state0.a = a;
}
@@ -1657,28 +1654,28 @@ function getImports() {
const ret = wasm.memory;
return addHeapObject(ret);
};
imports.wbg.__wbindgen_closure_wrapper2873 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 981, __wbg_adapter_28);
imports.wbg.__wbindgen_closure_wrapper2865 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 971, __wbg_adapter_28);
return addHeapObject(ret);
};
imports.wbg.__wbindgen_closure_wrapper2874 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 981, __wbg_adapter_31);
imports.wbg.__wbindgen_closure_wrapper2866 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 971, __wbg_adapter_31);
return addHeapObject(ret);
};
imports.wbg.__wbindgen_closure_wrapper2877 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 981, __wbg_adapter_34);
imports.wbg.__wbindgen_closure_wrapper2869 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 971, __wbg_adapter_34);
return addHeapObject(ret);
};
imports.wbg.__wbindgen_closure_wrapper3272 = function(arg0, arg1, arg2) {
const ret = makeClosure(arg0, arg1, 1143, __wbg_adapter_37);
imports.wbg.__wbindgen_closure_wrapper3248 = function(arg0, arg1, arg2) {
const ret = makeClosure(arg0, arg1, 1129, __wbg_adapter_37);
return addHeapObject(ret);
};
imports.wbg.__wbindgen_closure_wrapper3274 = function(arg0, arg1, arg2) {
const ret = makeClosure(arg0, arg1, 1143, __wbg_adapter_37);
imports.wbg.__wbindgen_closure_wrapper3250 = function(arg0, arg1, arg2) {
const ret = makeClosure(arg0, arg1, 1129, __wbg_adapter_37);
return addHeapObject(ret);
};
imports.wbg.__wbindgen_closure_wrapper3317 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 1166, __wbg_adapter_42);
imports.wbg.__wbindgen_closure_wrapper3293 = function(arg0, arg1, arg2) {
const ret = makeMutClosure(arg0, arg1, 1152, __wbg_adapter_42);
return addHeapObject(ret);
};

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docs/egui_demo_app_bg.wasm
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26
docs/index.html
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@@ -91,7 +91,6 @@
transform: rotate(360deg);
}
}
</style>
</head>
@@ -133,17 +132,7 @@
function on_wasm_loaded() {
console.debug("Wasm loaded. Starting app…");
// This call installs a bunch of callbacks and then returns:
let handle = new wasm_bindgen.WebHandle("the_canvas_id");
handle.then(on_app_started).catch(on_error);
}
function on_app_started(handle) {
// Call `handle.destroy()` to stop. Uncomment to quick result:
// setTimeout(() => { handle.destroy(); handle.free()) }, 2000)
console.debug("App started.");
document.getElementById("center_text").innerHTML = '';
let handle = new wasm_bindgen.WebHandle();
function check_for_panic() {
if (handle.has_panicked()) {
@@ -159,6 +148,9 @@
<p>
The egui app has crashed.
</p>
<p style="font-size:10px" align="left">
${handle.panic_message()}
</p>
<p style="font-size:14px">
See the console for details.
</p>
@@ -172,6 +164,16 @@
}
check_for_panic();
handle.start("the_canvas_id").then(on_app_started).catch(on_error);
}
function on_app_started(handle) {
// Call `handle.destroy()` to stop. Uncomment to quick result:
// setTimeout(() => { handle.destroy(); handle.free()) }, 2000)
console.debug("App started.");
document.getElementById("center_text").innerHTML = '';
}
function on_error(error) {

9
docs/multiple_apps.html
View File

@@ -100,7 +100,6 @@
transform: rotate(360deg);
}
}
</style>
</head>
@@ -158,11 +157,11 @@
// This call installs a bunch of callbacks and then returns:
const handle_one = new wasm_bindgen.WebHandle("canvas_id_one");
const handle_two = new wasm_bindgen.WebHandle("canvas_id_two");
const handle_one = new wasm_bindgen.WebHandle();
const handle_two = new wasm_bindgen.WebHandle();
Promise.all([handle_one, handle_two]).then((handles) => {
on_apps_started(handles[0], handles[1])
Promise.all([handle_one.start("canvas_id_one"), handle_two.start("canvas_id_two")]).then((handles) => {
on_apps_started(handle_one, handle_two)
}).catch(on_error);
}