perf(smileys): Use shared_ptr to automaticaly count references

src/chatlog/customtextdocument.cpp

@@ -40,7 +40,9 @@ QVariant CustomTextDocument::loadResource(int type, const QUrl& name)
                            Settings::getInstance().getEmojiFontPointSize());
         QString fileName = QUrl::fromPercentEncoding(name.toEncoded()).mid(4).toHtmlEscaped();
 
-        return SmileyPack::getInstance().getAsIcon(fileName).pixmap(size);
+        std::shared_ptr<QIcon> icon = SmileyPack::getInstance().getAsIcon(fileName);
+        emoticonIcons.append(icon);
+        return icon->pixmap(size);
     }
 
     return QTextDocument::loadResource(type, name);

src/chatlog/customtextdocument.h

@@ -21,15 +21,23 @@
 #define CUSTOMTEXTDOCUMENT_H
 
 #include <QTextDocument>
+#include <QList>
+
+#include <memory>
+
+class QIcon;
 
 class CustomTextDocument : public QTextDocument
 {
     Q_OBJECT
 public:
-    explicit CustomTextDocument(QObject* parent = 0);
+    explicit CustomTextDocument(QObject* parent = nullptr);
 
 protected:
     virtual QVariant loadResource(int type, const QUrl& name);
+
+private:
+    QList<std::shared_ptr<QIcon>> emoticonIcons;
 };
 
 #endif // CUSTOMTEXTDOCUMENT_H

src/persistence/smileypack.cpp

@@ -204,7 +204,6 @@ bool SmileyPack::load(const QString& filename)
     emoticons.clear();
     emoticonToIcon.clear();
     emoticonToPath.clear();
-    icons.clear();
 
     for (int i = 0; i < iconsCount; ++i) {
         QDomNode node = emoticonElements.at(i);
@@ -267,19 +266,21 @@ QList<QStringList> SmileyPack::getEmoticons() const
  * @param emoticon Passed emoticon
  * @return Returns cached icon according to passed emoticon, null if no icon mapped to this emoticon
  */
-QIcon SmileyPack::getAsIcon(const QString& emoticon)
+std::shared_ptr<QIcon> SmileyPack::getAsIcon(const QString& emoticon)
 {
     QMutexLocker locker(&loadingMutex);
     if (emoticonToIcon.contains(emoticon))
-        return *(emoticonToIcon[emoticon]);
+        return emoticonToIcon[emoticon];
 
-    if (!emoticonToPath.contains(emoticon))
+    const auto iconPathIt = emoticonToPath.find(emoticon);
-        return QIcon{};
+    if (iconPathIt == emoticonToPath.end()) {
+        return std::make_shared<QIcon>();
+    }
 
-    const QString& iconPath = emoticonToPath[emoticon];
+    const QString& iconPath = iconPathIt.value();
-    icons.append(QIcon{iconPath});
+    auto icon = std::make_shared<QIcon>(iconPath);
-    emoticonToIcon.insert(emoticon, &icons.last());
+    emoticonToIcon.insert(emoticon, icon);
-    return icons.last();
+    return icon;
 }
 
 void SmileyPack::onSmileyPackChanged()

src/persistence/smileypack.h

@@ -24,6 +24,8 @@
 #include <QMap>
 #include <QMutex>
 
+#include <memory>
+
 class SmileyPack : public QObject
 {
     Q_OBJECT
@@ -35,7 +37,7 @@ public:
 
     QString smileyfied(const QString& msg);
     QList<QStringList> getEmoticons() const;
-    QIcon getAsIcon(const QString& key);
+    std::shared_ptr<QIcon> getAsIcon(const QString& key);
 
 private slots:
     void onSmileyPackChanged();
@@ -47,9 +49,8 @@ private:
 
     bool load(const QString& filename);
 
-    QVector<QIcon> icons;
+    QMap<QString, std::shared_ptr<QIcon>> emoticonToIcon;
-    QMap<QString, const QIcon*> emoticonToIcon;
+    QHash<QString, QString> emoticonToPath;
-    QMap<QString, QString> emoticonToPath;
     QList<QStringList> emoticons;
     QString path;
     mutable QMutex loadingMutex;

src/widget/emoticonswidget.cpp

@@ -86,9 +86,12 @@ EmoticonsWidget::EmoticonsWidget(QWidget* parent)
     }
     buttonLayout->addStretch();
 
+    SmileyPack& smileyPack = SmileyPack::getInstance();
     for (const QStringList& set : emoticons) {
         QPushButton* button = new QPushButton;
-        button->setIcon(SmileyPack::getInstance().getAsIcon(set[0]).pixmap(size));
+        std::shared_ptr<QIcon> icon = smileyPack.getAsIcon(set[0]);
+        emoticonsIcons.append(icon);
+        button->setIcon(icon->pixmap(size));
         button->setToolTip(set.join(" "));
         button->setProperty("sequence", set[0]);
         button->setCursor(Qt::PointingHandCursor);

src/widget/emoticonswidget.h

@@ -23,6 +23,11 @@
 #include <QMenu>
 #include <QStackedWidget>
 #include <QVBoxLayout>
+#include <QVector>
+
+#include <memory>
+
+class QIcon;
 
 class EmoticonsWidget : public QMenu
 {
@@ -47,6 +52,7 @@ protected:
 private:
     QStackedWidget stack;
     QVBoxLayout layout;
+    QList<std::shared_ptr<QIcon>> emoticonsIcons;
 
 public:
     QSize sizeHint() const override;

src/widget/form/settings/userinterfaceform.cpp

@@ -239,10 +239,12 @@ void UserInterfaceForm::reloadSmileys()
     for (int i = 0; i < emoticons.size(); ++i)
         smileys.push_front(emoticons.at(i).first());
 
+    emoticonsIcons.clear();
     const QSize size(18, 18);
     for (int i = 0; i < smileLabels.size(); ++i) {
-        QIcon icon = SmileyPack::getInstance().getAsIcon(smileys[i]);
+        std::shared_ptr<QIcon> icon = SmileyPack::getInstance().getAsIcon(smileys[i]);
-        smileLabels[i]->setPixmap(icon.pixmap(size));
+        emoticonsIcons.append(icon);
+        smileLabels[i]->setPixmap(icon->pixmap(size));
         smileLabels[i]->setToolTip(smileys[i]);
     }
 
@@ -253,8 +255,7 @@ void UserInterfaceForm::reloadSmileys()
     int maxSide = qMin(desktop.geometry().height() / sideSize, desktop.geometry().width() / sideSize);
     QSize maxSize(maxSide, maxSide);
 
-    QIcon icon = SmileyPack::getInstance().getAsIcon(smileys[0]);
+    QSize actualSize = emoticonsIcons.first()->actualSize(maxSize);
-    QSize actualSize = icon.actualSize(maxSize);
     bodyUI->emoticonSize->setMaximum(actualSize.width());
 }
 

src/widget/form/settings/userinterfaceform.h

@@ -23,6 +23,8 @@
 #include "genericsettings.h"
 #include "src/widget/form/settingswidget.h"
 
+#include <memory>
+
 namespace Ui {
 class UserInterfaceSettings;
 }
@@ -65,6 +67,7 @@ private:
 
 private:
     QList<QLabel*> smileLabels;
+    QList<std::shared_ptr<QIcon>> emoticonsIcons;
     SettingsWidget* parent;
     Ui::UserInterfaceSettings* bodyUI;
     const int MAX_FORMAT_LENGTH = 128;