Add basic support for system icons and custom icons

src/core/iconloader.cpp

@@ -3,6 +3,7 @@
  * Copyright 2013, Jonas Kvinge <jonas@strawbs.net>
  * This file was part of Clementine.
  * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2017-2019, Jonas Kvinge <jonas@jkvinge.net>
  *
  * Strawberry is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,28 +22,64 @@
 
 #include "config.h"
 
+#include <QDir>
 #include <QFile>
 #include <QList>
 #include <QString>
 #include <QIcon>
 #include <QSize>
-#include <QtDebug>
+#include <QStandardPaths>
+#include <QSettings>
 
 #include "core/logging.h"
+#include "settings/appearancesettingspage.h"
 #include "iconloader.h"
 
+bool IconLoader::system_icons_ = false;
+bool IconLoader::custom_icons_ = false;
+
+void IconLoader::Init() {
+
+  QSettings s;
+  s.beginGroup(AppearanceSettingsPage::kSettingsGroup);
+  system_icons_ = s.value("system_icons", false).toBool();
+  s.endGroup();
+
+  QDir dir;
+  if (dir.exists(QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation) + "/icons")) {
+    custom_icons_ = true;
+  }
+
+}
+
 QIcon IconLoader::Load(const QString &name, const int size) {
 
   QIcon ret;
 
+  if (name.isEmpty()) {
+    qLog(Error) << "Icon name is empty!";
+    return ret;
+  }
+
   QList<int> sizes;
   sizes.clear();
   if (size == 0) { sizes << 22 << 32 << 48 << 64; }
   else sizes << size;
 
-  if (name.isEmpty()) {
-    qLog(Error) << "Icon name is empty!";
-    return ret;
+  if (system_icons_) {
+    ret = QIcon::fromTheme(name);
+    if (!ret.isNull()) return ret;
+    qLog(Warning) << "Couldn't load icon" << name << "from system theme icons.";
+  }
+
+  if (custom_icons_) {
+    QString custom_icon_path = QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation) + "/icons/%1x%2/%3.png";
+    for (int s : sizes) {
+      QString filename(custom_icon_path.arg(s).arg(s).arg(name));
+      if (QFile::exists(filename)) ret.addFile(filename, QSize(s, s));
+    }
+    if (!ret.isNull()) return ret;
+    qLog(Warning) << "Couldn't load icon" << name << "from custom icons.";
   }
 
   const QString path(":/icons/%1x%2/%3.png");
@@ -51,13 +88,6 @@ QIcon IconLoader::Load(const QString &name, const int size) {
     if (QFile::exists(filename)) ret.addFile(filename, QSize(s, s));
   }
 
-  // Load icon from system theme only if it hasn't been found
-  if (ret.isNull()) {
-    ret = QIcon::fromTheme(name);
-    if (!ret.isNull()) return ret;
-    qLog(Warning) << "Couldn't load icon" << name;
-  }
-
   return ret;
 
 }

src/core/iconloader.h

@@ -2,6 +2,7 @@
  * Strawberry Music Player
  * This file was part of Clementine.
  * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2017-2019, Jonas Kvinge <jonas@jkvinge.net>
  *
  * Strawberry is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,10 +28,12 @@
 
 class IconLoader {
  public:
+  static void Init();
   static QIcon Load(const QString &name, const int size = 0);
-private:
+ private:
   IconLoader() {}
+  static bool system_icons_;
+  static bool custom_icons_;
 };
 
-#endif // ICONLOADER_H
-
+#endif  // ICONLOADER_H

src/main.cpp

@@ -223,6 +223,8 @@ int main(int argc, char* argv[]) {
   QLoggingCategory::defaultCategory()->setEnabled(QtDebugMsg, true);
 #endif
 
+  IconLoader::Init();
+
 #ifdef HAVE_TRANSLATIONS
   QString override_language = options.language();
   if (override_language.isEmpty()) {

src/settings/appearancesettingspage.cpp

@@ -124,6 +124,7 @@ void AppearanceSettingsPage::Load() {
   ui_->background_image_filename->setText(playlist_view_background_image_filename_);
   ui_->blur_slider->setValue(s.value("blur_radius", PlaylistView::kDefaultBlurRadius).toInt());
   ui_->opacity_slider->setValue(s.value("opacity_level", PlaylistView::kDefaultOpacityLevel).toInt());
+  ui_->checkbox_system_icons->setChecked(s.value("system_icons", false).toBool());
 
   s.endGroup();
 
@@ -161,6 +162,7 @@ void AppearanceSettingsPage::Save() {
   s.setValue(PlaylistView::kSettingBackgroundImageType, playlist_view_background_image_type_);
   s.setValue("blur_radius", ui_->blur_slider->value());
   s.setValue("opacity_level", ui_->opacity_slider->value());
+  s.setValue("system_icons", ui_->checkbox_system_icons->isChecked());
 
   s.endGroup();
 

src/settings/appearancesettingspage.ui

@@ -222,6 +222,13 @@
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QCheckBox" name="checkbox_system_icons">
+     <property name="text">
+      <string>Use system theme icons</string>
+     </property>
+    </widget>
+   </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">