Fix desktop hover and emoji playback; share Android chat background

tools/chatgui/src/animtimer.cpp

@@ -5,7 +5,6 @@
 AnimTimer::AnimTimer() {
     m_timer.setInterval(33);
     connect(&m_timer, &QTimer::timeout, this, &AnimTimer::onTimer);
-    m_timer.start();
 }
 
 AnimTimer *AnimTimer::instance() {
@@ -15,6 +14,7 @@ AnimTimer *AnimTimer::instance() {
 
 void AnimTimer::shutdown() {
     instance()->m_timer.stop();
+    instance()->m_playback.invalidate();
     instance()->m_icons.clear();
     DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "AnimTimer: shutdown");
 }
@@ -31,22 +31,29 @@ LottieIcon *AnimTimer::icon(const QString &key) const {
     return m_icons.value(key, nullptr);
 }
 
-void AnimTimer::activate() {
-    if (m_activeRef++ == 0) {
-        for (auto *icon : m_icons)
-            icon->advanceFrame();
-        emit ticked();
+void AnimTimer::play() {
+    if (m_icons.isEmpty()) {
+        GUI_WARN("AnimTimer: playback requested without registered icons");
+        return;
     }
-}
-
-void AnimTimer::deactivate() {
-    if (m_activeRef > 0) m_activeRef--;
+    GUI_DEBUG("AnimTimer: hover trigger icons=%d running=%d playback_ms=%d", (int)m_icons.size(), m_timer.isActive(), PlaybackMs);
+    m_playback.start();
+    m_timer.start();
 }
 
 void AnimTimer::onTimer() {
-    if (m_activeRef <= 0) return;
-    for (auto *icon : m_icons)
-        icon->advanceFrame();
+    const qint64 elapsed = m_playback.elapsed();
+    const bool finishing = elapsed >= PlaybackMs;
+    bool finished = true;
+    for (auto *icon : m_icons) {
+        if (!finishing || icon->currentFrame() != 0) icon->advanceFrame();
+        if (icon->currentFrame() != 0) finished = false;
+    }
+    if (finishing && finished) {
+        m_timer.stop();
+        m_playback.invalidate();
+        GUI_DEBUG("AnimTimer: playback finished elapsed_ms=%lld icons=%d all_frames=0", (long long)elapsed, (int)m_icons.size());
+    }
     emit ticked();
 }