feat(qt): immersive split view, lyrics, track info, suggestions, queue tabs (B4)

km

crates/qbz-qt/qml/immersive/TrackInfoPanel.qml

@@ -0,0 +1,139 @@
+// TrackInfoPanel — the SPLIT-right Track Info panel (split-panel == 1; §6.3
+// of the 2026-08-02 immersive-port contract), the Qt answer to
+// crates/qbz-ui/ui/immersive/ImmersiveTrackInfoPanel.slint.
+//
+// NOT a re-render: the panel mounts the SHARED qml/shell/TrackInfoBody.qml
+// through a SHIM host (the QtObject below) that exposes the exact host API
+// TrackInfoBody reads (doc/loading/errorText/credits/creditsLeft/
+// creditsRight + close() + openArtist + openLabel + openMusician —
+// TrackInfoBody.qml:27,:31,:47,:260,:283,:295,:159,:133,:252,:288,:301).
+// The shim parses QbzAlbum.trackInfoJson EXACTLY like
+// TrackInfoModal.qml:71-90 (same guarded parse, same even/odd credit
+// split — info_modals.rs step_by(2)).
+//
+// DIVERGENCES (contract §6.3/D10):
+//  * The body's 32x32 close X is a visual element Slint's immersive panel
+//    doesn't have — close() here is a PANEL-SWITCH to Lyrics
+//    (setView(1, mode, 0)), not an overlay exit.
+//  * openLabel / openMusician are INERT in the desktop modal (its TODO
+//    comments) but LIVE here per the contract: openLabel ->
+//    QbzHome.openLabel, openMusician -> QbzArtist.resolveMusician,
+//    openArtist -> QbzArtist.openArtist (the existing artist nav,
+//    TrackInfoModal.qml:109-114).
+//  * PARITY: immersive STAYS OPEN on navigation — the shell navigates
+//    UNDER the overlay (Slint main.rs:15549-15586 closes only
+//    TrackInfoState, never ImmersiveState.open).
+//
+// CAVEAT (trap 18): trackInfoJson is ONE global doc — the desktop
+// TrackInfoModal and this panel share it; never open both.
+//
+// Content height: min(vh, clamp(340, vh*0.62, 760)), vertically centered
+// (:84-87 — Tauri .centered-layout height clamp(340px, 62vh, 760px)).
+
+import QtQuick
+import com.blitzfc.qbz
+import "../shell"
+import "../theme"
+
+Item {
+    id: root
+
+    // --- The shim host (TrackInfoBody's `host` contract) -------------------
+    // One QtObject: the parsed document fields + the four actions the body
+    // calls as `host.close()` / `host.openArtist(id)` / `host.openLabel(id)`
+    // / `host.openMusician(name, role)`.
+    QtObject {
+        id: host
+
+        // Verbatim TrackInfoModal.qml:71-90.
+        readonly property var doc: parseDoc()
+        function parseDoc() {
+            try {
+                return JSON.parse(QbzAlbum.trackInfoJson || "{}")
+            } catch (e) {
+                return ({})
+            }
+        }
+        readonly property bool loading: {
+            try {
+                return QbzAlbum.trackInfoLoading === true
+            } catch (e) {
+                return false
+            }
+        }
+        readonly property string errorText: doc.error || ""
+        readonly property var credits: doc.credits || []
+        // Even index -> left column, odd -> right (info_modals.rs step_by(2)).
+        readonly property var creditsLeft: credits.filter(function (c, i) { return i % 2 === 0 })
+        readonly property var creditsRight: credits.filter(function (c, i) { return i % 2 === 1 })
+
+        // close() — the body's X is a panel-switch to Lyrics (D10).
+        function close() {
+            QbzImmersive.setView(1, QbzImmersive.mode, 0)
+        }
+        // Navigation — immersive STAYS OPEN (§6.3 parity); the shell
+        // navigates UNDER the overlay.
+        function openArtist(artistId) {
+            if (!artistId || artistId === "")
+                return
+            QbzArtist.openArtist(artistId)
+        }
+        function openLabel(labelId) {
+            if (!labelId || labelId === "")
+                return
+            QbzHome.openLabel(labelId)
+        }
+        function openMusician(name, roleRaw) {
+            if (!name || name === "")
+                return
+            QbzArtist.resolveMusician(name, roleRaw || "")
+        }
+    }
+
+    // --- Centered, height-capped content (:81-87) --------------------------
+    Item {
+        anchors.horizontalCenter: parent.horizontalCenter
+        anchors.verticalCenter: parent.verticalCenter
+        width: parent.width
+        height: Math.min(root.height, Math.max(340, Math.min(root.height * 0.62, 760)))
+
+        // ---- Empty (no track / not yet loaded) -------------------------
+        // Slint :121-129: !loading && error == "" && title == "".
+        Text {
+            visible: !host.loading && host.errorText === ""
+                && ((host.doc.title || "") === "")
+            anchors.centerIn: parent
+            text: QbzSession.tr("No track selected", QbzSession.trRev)
+            color: "#b3ffffff"
+            font.pixelSize: 18
+        }
+
+        // ---- Loading / error / loaded — the shared body ---------------
+        Flickable {
+            id: flick
+            anchors.fill: parent
+            visible: host.loading || host.errorText !== ""
+                || ((host.doc.title || "") !== "")
+            contentWidth: width
+            contentHeight: body.implicitHeight
+            boundsBehavior: Flickable.StopAtBounds
+            clip: true
+
+            TrackInfoBody {
+                id: body
+                host: host
+                width: flick.width
+            }
+        }
+
+        // The Slint mounts a 14px ListScrollbar inset 4px from the right
+        // (:271-278 via the modal's idiom).
+        QbzScrollBar {
+            target: flick
+            anchors.right: parent.right
+            anchors.rightMargin: 4
+            anchors.top: parent.top
+            anchors.bottom: parent.bottom
+        }
+    }
+}