From daf5eaddf2782c23b5cf6da39049d44e98b3a2e9 Mon Sep 17 00:00:00 2001
From: ronso0 <ronso0@mixxx.org>
Date: Tue, 13 Feb 2024 10:26:24 +0100
Subject: [PATCH] Revert "Samplers: don't create unneeded empty samplers during
 startup"

This reverts commit cf9b4816add835ff5eee561141eabec771a16c56.
---
 src/mixer/playermanager.cpp |  7 +----
 src/mixer/samplerbank.cpp   | 63 ++++++++++++++-----------------------
 src/mixer/samplerbank.h     |  3 +-
 3 files changed, 25 insertions(+), 48 deletions(-)

diff --git a/src/mixer/playermanager.cpp b/src/mixer/playermanager.cpp
index 08cbbdf66b8..a70dc1f32d5 100644
--- a/src/mixer/playermanager.cpp
+++ b/src/mixer/playermanager.cpp
@@ -450,12 +450,7 @@ void PlayerManager::addDeckInner() {
 }
 
 void PlayerManager::loadSamplers() {
-    // This is only called by CoreServices during startup to restore
-    // samplers from the previous session.
-    // We don't want it to create more players than necessary.
-    bool dontCreateEmptySamplers = true;
-    m_pSamplerBank->loadSamplerBankFromPath(getDefaultSamplerPath(m_pConfig),
-            dontCreateEmptySamplers);
+    m_pSamplerBank->loadSamplerBankFromPath(getDefaultSamplerPath(m_pConfig));
 }
 
 void PlayerManager::addSampler() {
diff --git a/src/mixer/samplerbank.cpp b/src/mixer/samplerbank.cpp
index 647cc269634..4e03f6cdea7 100644
--- a/src/mixer/samplerbank.cpp
+++ b/src/mixer/samplerbank.cpp
@@ -165,8 +165,7 @@ void SamplerBank::slotLoadSamplerBank(double v) {
     }
 }
 
-bool SamplerBank::loadSamplerBankFromPath(const QString& samplerBankPath,
-        bool dontCreateEmptySamplers) {
+bool SamplerBank::loadSamplerBankFromPath(const QString& samplerBankPath) {
     // The user has picked a new directory via a file dialog. This means the
     // system sandboxer (if we are sandboxed) has granted us permission to this
     // folder. We don't need access to this file on a regular basis so we do not
@@ -196,47 +195,31 @@ bool SamplerBank::loadSamplerBankFromPath(const QString& samplerBankPath,
         return false;
     }
 
-    const auto samplerNodes = root.childNodes();
-    if (samplerNodes.isEmpty()) {
-        return true;
-    }
-    for (int i = 0; i < samplerNodes.size(); i++) {
-        QDomNode n = samplerNodes.at(i);
-        QDomElement e = n.toElement();
-        if (e.isNull() || e.tagName() != "sampler") {
-            continue;
-        }
+    QDomNode n = root.firstChild();
 
-        const QString group = e.attribute("group", "");
-        const QString location = e.attribute("location", "");
-        int samplerNum;
-
-        if (group.isEmpty() || !m_pPlayerManager->isSamplerGroup(group, &samplerNum)) {
-            continue;
-        }
-
-        // During startup we only increase the sampler count if there is
-        // a track to be loaded. This avoids
-        // * creating more sampler players than strictly necessary
-        // * an unnecessary large Load To > Sampler N submenu in the track menu
-        if (dontCreateEmptySamplers && location.isEmpty()) {
-            continue;
-        }
-
-        // Later on, when the user loads a samplers file manually, we
-        // want to eject loaded tracks if the file's sample slot is empty.
-        // We also create new players even if they are not present in the
-        // GUI to not drop tracks loaded to invisible samplers when saving
-        // the samplers file.
-        if (static_cast<int>(m_pPlayerManager->numSamplers()) < samplerNum) {
-            m_pCONumSamplers->set(samplerNum);
-        }
+    while (!n.isNull()) {
+        QDomElement e = n.toElement();
 
-        if (location.isEmpty()) {
-            m_pPlayerManager->slotLoadTrackToPlayer(TrackPointer(), group, false);
-        } else {
-            m_pPlayerManager->slotLoadLocationToPlayer(location, group, false);
+        if (!e.isNull()) {
+            if (e.tagName() == "sampler") {
+                QString group = e.attribute("group", "");
+                QString location = e.attribute("location", "");
+                int samplerNum;
+
+                if (!group.isEmpty() && m_pPlayerManager->isSamplerGroup(group, &samplerNum)) {
+                    if (m_pPlayerManager->numSamplers() < (unsigned)samplerNum) {
+                        m_pCONumSamplers->set(samplerNum);
+                    }
+
+                    if (location.isEmpty()) {
+                        m_pPlayerManager->slotLoadTrackToPlayer(TrackPointer(), group, false);
+                    } else {
+                        m_pPlayerManager->slotLoadLocationToPlayer(location, group, false);
+                    }
+                }
+            }
         }
+        n = n.nextSibling();
     }
 
     file.close();
diff --git a/src/mixer/samplerbank.h b/src/mixer/samplerbank.h
index 0f787e089d2..5234f045f71 100644
--- a/src/mixer/samplerbank.h
+++ b/src/mixer/samplerbank.h
@@ -19,8 +19,7 @@ class SamplerBank : public QObject {
             PlayerManager* pPlayerManager);
 
     bool saveSamplerBankToPath(const QString& samplerBankPath);
-    bool loadSamplerBankFromPath(const QString& samplerBankPath,
-            bool dontCreateEmptySamplers = false);
+    bool loadSamplerBankFromPath(const QString& samplerBankPath);
 
   private slots:
     void slotSaveSamplerBank(double v);