Clean up project structure

brittle-ui/src/pdf_viewer.rs

@@ -0,0 +1,55 @@
+//! PDF viewer tab: embeds the Tauri-served PDF viewer in an iframe.
+//!
+//! The custom `brittle://` URI scheme serves:
+//!   - `brittle://app/viewer?ref_id=<uuid>` — the viewer HTML page (PDF.js)
+//!   - `brittle://app/pdf?ref_id=<uuid>`    — the raw PDF bytes
+//!
+//! Using an `<iframe>` keeps the viewer alive when the tab is hidden (via
+//! `display:none`), so scrolling position and zoom are preserved across
+//! tab switches.
+
+use brittle_keymap::actions;
+use leptos::prelude::*;
+use wasm_bindgen::JsValue;
+
+/// Renders the PDF viewer for a single reference.
+///
+/// `ref_id` must be the UUID string of a reference that has an attached PDF.
+/// `is_active` indicates whether this is the currently visible PDF tab; when
+/// `true`, keymap actions for PDF page navigation are forwarded into the iframe.
+#[component]
+pub fn PdfViewer(ref_id: String, is_active: Signal<bool>) -> impl IntoView {
+    let url = format!("brittle://app/viewer?ref_id={ref_id}");
+
+    let iframe_ref = NodeRef::<leptos::html::Iframe>::new();
+
+    let keymap_action = use_context::<crate::KeymapAction>()
+        .expect("KeymapAction context missing")
+        .0;
+
+    Effect::new(move |_| {
+        let Some(ev) = keymap_action.get() else { return };
+        if !is_active.get_untracked() { return }
+
+        let cmd = match ev.name.as_str() {
+            actions::PDF_PAGE_NEXT => actions::PDF_PAGE_NEXT,
+            actions::PDF_PAGE_PREV => actions::PDF_PAGE_PREV,
+            _ => return,
+        };
+
+        let Some(iframe) = iframe_ref.get() else { return };
+        if let Some(win) = iframe.content_window() {
+            let _ = win.post_message(&JsValue::from_str(cmd), "*");
+        }
+    });
+
+    view! {
+        <iframe
+            node_ref=iframe_ref
+            class="pdf-frame"
+            src=url
+            // Intentionally no `sandbox` attribute — the brittle:// protocol
+            // and PDF.js require unrestricted access within the webview.
+        />
+    }
+}