gmp
e019a950b1
Chromium owns scroll/compositor/lazy-load/image-cache; Rust owns scan/SQLite/thumbnail-decode behind a gallery:// custom protocol. Hard-won gotchas (see in-code comments): - Android: no native custom-scheme support → wry rewrites the URL to http://gallery.localhost/... (custom_protocol_workaround). The JS MUST request that form; the handler receives the reverted gallery://localhost/... and must strip the authority. - tauri_build::build() in build.rs must run UNCONDITIONALLY (build scripts run on the host: a cfg(target_os) gate silently disables it, which skips the rustc-cfg=mobile emission → no mobile_entry_point → .so with no JNI symbols → UnsatisfiedLinkError). - build.rs must list frontend files for rerun-if-changed (a dir-level directive only watches the dir mtime, not content edits) — the .so bakes the frontend at compile time and cargo otherwise ships stale UI with a 'successful' build. - logcat drops ~75% of lines under load: use the file trace. - fetch() is CORS-restricted (page origin http://tauri.localhost); <img> is not — add ACAO:* anyway. Emulator (5853 real files): grid renders, lazy thumbs via gallery:// with on-disk cache (87 files 35-72KB), FR log clean at 60Hz, viewer opens full-res with compositor-only pan/zoom. The single 'broken' cell is a 17-byte fake test JPEG (correct behavior).
28 lines
1.1 KiB
Rust
28 lines
1.1 KiB
Rust
// tauri::generate_context!() embeds `frontendDist` at compile time. Without
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// rerun directives cargo does NOT rebuild the .so when frontend files change
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// (observed: stale grid code survived a "successful" rebuild). Directory-level
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// rerun-if-changed only tracks the dir mtime (add/remove/rename, NOT content
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// edits), so list every file explicitly.
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fn walk(p: &std::path::Path) {
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for e in std::fs::read_dir(p).unwrap() {
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let e = e.unwrap();
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let path = e.path();
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if path.is_dir() {
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walk(&path);
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} else {
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println!("cargo:rerun-if-changed={}", path.display());
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}
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}
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}
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fn main() {
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walk(std::path::Path::new("frontend/dist"));
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println!("cargo:rerun-if-changed=tauri.conf.json");
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// tauri_build::build() inspects the TARGET env var itself (build scripts
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// run on the HOST, so a cfg(target_os) gate would disable it). For
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// android targets it emits `cargo:rustc-cfg=mobile`, which is what
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// activates `#[cfg_attr(mobile, tauri::mobile_entry_point)]`.
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tauri_build::build();
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}
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