feat: basic lyrics support

lrcbar.h

@@ -0,0 +1,36 @@
+// SPDX-FileCopyrightText: 2024 Gary Wang <git@blumia.net>
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <QLinearGradient>
+#include <QMediaPlayer>
+#include <QWidget>
+
+class LyricsManager;
+class LrcBar : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit LrcBar(QWidget *parent);
+    ~LrcBar();
+
+    bool loadLyrics(QString filepath);
+    void playbackPositionChanged(int timestampMs, int totalTimeMs);
+
+protected:
+    QSize sizeHint() const override;
+    void mouseMoveEvent(QMouseEvent *event) override;
+    void paintEvent(QPaintEvent *) override;
+    void enterEvent(QEnterEvent *) override;
+    void leaveEvent(QEvent *) override;
+
+private:
+    int m_currentTimeMs = 0;
+    LyricsManager * m_lrcMgr;
+    QFont m_font;
+    QLinearGradient m_baseLinearGradient;
+    QLinearGradient m_maskLinearGradient;
+    bool m_underMouse = false;
+};