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ifcviewer-web: load user sidecars via a file-browse button (#46)

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Adds an "Open .ifcview…" button that opens the browser's native file
chooser. The picked file's bytes are written into MEMFS and a new
exported entry point, load_uploaded_model_c, reads them back via the
existing loadSidecarFromPath: it resetScene()s the current model
(replace, not append), loads the sidecar, and viewAll()s it. Geometry
becomes resident over subsequent frames through render()'s inline
driveStreamingLoads, same as the embedded sample.

Deliberately a file picker, not drag-drop: browser file drag-drop needs
an X11 drag source (a file manager) to drag *from*, which a minimal WM
(ratpoison) doesn't provide. The native chooser is WM-independent.

Exports _load_uploaded_model_c and the FS runtime method; URL/byte-range
fetch of remote models stays for #88.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-06-29 11:19:49 +10:00
parent d36d241da2
commit e3722cf243
3 changed files with 75 additions and 4 deletions
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src/ifcviewer-web/shell.html
+38
View File
@@ -14,10 +14,17 @@
background: rgba(20,22,28,.78); padding: 6px 10px; border-radius: 4px;
white-space: pre-wrap; pointer-events: auto; }
#status.error { background: rgba(120,30,30,.85); color: #fff; }
#open-btn { position: fixed; top: 8px; right: 12px; z-index: 10;
background: #2b6cb0; color: #fff; border: none; padding: 6px 12px;
border-radius: 4px; font-size: 12px; cursor: pointer; }
#open-btn:hover { background: #3182ce; }
#file-input { display: none; }
</style>
</head>
<body>
<canvas id="viewer-canvas" width="1280" height="800"></canvas>
<button id="open-btn">Open .ifcview…</button>
<input id="file-input" type="file" accept=".ifcview">
<div id="status">Starting…</div>
<script>
// Emscripten Module hook: route stderr to the status overlay so any
@@ -69,6 +76,37 @@
statusEl.textContent = 'navigator.gpu is missing — open in a browser with WebGPU enabled';
statusEl.classList.add('error');
}
// File-browse loading. The picked file's bytes are written into MEMFS
// (the same virtual FS the wasm fopen()s) and then load_uploaded_model_c
// is invoked to read + render it. No drag-drop: that needs an X11 drag
// source (a file manager), which a minimal WM may not provide; the
// native file chooser this button opens is WM-independent.
var openBtn = document.getElementById('open-btn');
var fileInput = document.getElementById('file-input');
openBtn.addEventListener('click', function() { fileInput.click(); });
fileInput.addEventListener('change', function(ev) {
var f = ev.target.files && ev.target.files[0];
if (!f) return;
if (!Module.FS || !Module._load_uploaded_model_c) {
statusEl.textContent += 'viewer not ready yet — wait for WebGPU init\n';
return;
}
var reader = new FileReader();
reader.onload = function() {
try {
var bytes = new Uint8Array(reader.result);
try { Module.FS.mkdir('/uploads'); } catch (e) { /* already exists */ }
Module.FS.writeFile('/uploads/model.ifcview', bytes);
Module._load_uploaded_model_c();
} catch (e) {
statusEl.textContent += 'load failed: ' + e + '\n';
statusEl.classList.add('error');
}
fileInput.value = ''; // let the same file be re-picked
};
reader.readAsArrayBuffer(f);
});
</script>
<!-- IfcViewerWeb.js is emitted alongside this shell by the emcc build;
`--shell-file` injects this HTML around it. -->