+/***************************************************************************
+ * Copyright (C) 2005-2018 by the Quassel Project *
+ * devel@quassel-irc.org *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) version 3. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
+ ***************************************************************************/
+
+#include "icon.h"
+
+#include <set>
+
+#include <QDebug>
+
+namespace icon {
+
+namespace {
+
+void printWarning(const QString &iconName, const QString &extra = {})
+{
+ static std::set<QString> warnedAbout;
+ if (warnedAbout.insert(iconName).second) {
+ qWarning() << "Missing icon:" << iconName << qPrintable(extra);
+ }
+}
+
+}
+
+
+QIcon get(const QString &iconName, const QString &fallbackPath)
+{
+ return get(std::vector<QString>{iconName}, fallbackPath);
+}
+
+
+QIcon get(const std::vector<QString> &iconNames, const QString &fallbackPath)
+{
+ for (auto &&iconName : iconNames) {
+ // Exact match
+ if (QIcon::hasThemeIcon(iconName)) {
+ return QIcon::fromTheme(iconName);
+ }
+ }
+
+ for (auto &&iconName : iconNames) {
+ // Try to get something from the theme anyway (i.e. a more generic fallback)
+ QIcon fallback = QIcon::fromTheme(iconName);
+ if (!fallback.availableSizes().isEmpty()) {
+ printWarning(iconName, QString{"(using fallback: \"%1\")"}.arg(fallback.name()));
+ return fallback;
+ }
+ }
+
+ // Build error string
+ QStringList requested;
+ for (auto &&iconName : iconNames) {
+ requested << iconName;
+ }
+ QString missing = "{" + requested.join(", ") + "}";
+
+ // Nothing from the theme, so try to load from path if given
+ if (!fallbackPath.isEmpty()) {
+ QIcon fallback{fallbackPath};
+ if (!fallback.availableSizes().isEmpty()) {
+ printWarning(missing, QString{"(using fallback: \"%1\")"}.arg(fallbackPath));
+ return fallback;
+ }
+ }
+
+ // Meh.
+ printWarning(missing);
+ return {};
+}
+
+}