新增appicon provider类，提供查询应用图标的功能

CMakeLists.txt

@@ -76,6 +76,7 @@ set(SOURCE_FILES
         src/uiconfig/theme-palette.cpp src/uiconfig/theme-palette.h
         src/ukui-menu-application.cpp src/ukui-menu-application.h
         src/model/model-manager.cpp src/model/model-manager.h
+        src/appdata/app-icon-provider.cpp src/appdata/app-icon-provider.h
         )
 
 # qrc文件

res/res.qrc

@@ -1,5 +1,5 @@
 <RCC>
     <qresource prefix="/res">
-        <file>icon.ico</file>
+        <file>icon/application-x-desktop.png</file>
     </qresource>
 </RCC>

src/appdata/app-icon-provider.cpp

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2022, KylinSoft Co., Ltd.
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "app-icon-provider.h"
+
+#include <QDebug>
+#include <QIcon>
+#include <QFile>
+
+namespace UkuiMenu {
+
+QSize AppIconProvider::s_defaultSize = QSize(128, 128);
+
+AppIconProvider::AppIconProvider() : QQuickImageProvider(QQmlImageProviderBase::Pixmap)
+{
+
+}
+
+QPixmap AppIconProvider::requestPixmap(const QString &id, QSize *size, const QSize &requestedSize)
+{
+    // 不处理sourceSize请求
+    Q_UNUSED(requestedSize);
+    QPixmap pixmap;
+    loadPixmap(id, pixmap);
+
+    if (size) {
+        QSize pixmapSize = pixmap.size();
+        size->setWidth(pixmapSize.width());
+        size->setHeight(pixmapSize.height());
+    }
+
+    return pixmap;
+}
+
+void AppIconProvider::loadPixmap(const QString &id, QPixmap &pixmap)
+{
+    if (id.isEmpty()) {
+        loadDefault(pixmap);
+        return;
+    }
+
+    bool isOk;
+    QUrl url(id);
+    if (!url.scheme().isEmpty()) {
+        isOk = loadPixmapFromUrl(url, pixmap);
+
+    } else if (id.startsWith(QLatin1String("/")) || id.startsWith(QLatin1String(":/"))) {
+        //qrc path: :/xxx/xxx.png
+        isOk = loadPixmapFromPath(id, pixmap);
+
+    } else {
+        isOk = loadPixmapFromTheme(id, pixmap);
+    }
+
+    if (!isOk) {
+        loadDefault(pixmap);
+    }
+}
+
+// see: https://doc.qt.io/archives/qt-5.12/qurl.html#details
+bool AppIconProvider::loadPixmapFromUrl(const QUrl &url, QPixmap &pixmap)
+{
+    QString path = url.path();
+    if (path.isEmpty()) {
+        qWarning() << "Error: loadPixmapFromUrl, path is empty.";
+        return false;
+    }
+
+    // qrc example: the Path ":/images/cut.png" or the URL "qrc:///images/cut.png"
+    // see: https://doc.qt.io/archives/qt-5.12/resources.html
+    if (url.scheme() == QLatin1String("qrc")) {
+        path.prepend(QLatin1String(":"));
+        return loadPixmapFromPath(path, pixmap);
+    }
+
+    // net?
+    return false;
+}
+
+bool AppIconProvider::loadPixmapFromPath(const QString &path, QPixmap &pixmap)
+{
+    if (!QFile::exists(path)) {
+        qWarning() << "Error: loadPixmapFromPath, File dose not exists." << path;
+        return false;
+    }
+
+    QPixmap filePixmap;
+    bool isOk = filePixmap.load(path);
+    if (!isOk) {
+        return false;
+    }
+
+    pixmap.swap(filePixmap);
+
+    return true;
+}
+
+bool AppIconProvider::loadPixmapFromTheme(const QString &name, QPixmap &pixmap)
+{
+    if (!QIcon::hasThemeIcon(name)) {
+        qWarning() << "Error: loadPixmapFromTheme, icon dose not exists. name:" << name;
+        return false;
+    }
+    QIcon icon = QIcon::fromTheme(name);
+    pixmap = icon.pixmap(AppIconProvider::s_defaultSize);
+    return true;
+}
+
+void AppIconProvider::loadDefault(QPixmap &pixmap)
+{
+    if (!loadPixmapFromTheme("application-x-desktop", pixmap)) {
+        loadPixmapFromPath(":/res/icon/application-x-desktop.png", pixmap);
+    }
+}
+
+} // UkuiMenu

src/appdata/app-icon-provider.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022, KylinSoft Co., Ltd.
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef UKUI_MENU_APP_ICON_PROVIDER_H
+#define UKUI_MENU_APP_ICON_PROVIDER_H
+
+#include <QSize>
+#include <QQuickImageProvider>
+
+namespace UkuiMenu {
+
+// see: https://doc.qt.io/archives/qt-5.12/qquickimageprovider.html#details
+class AppIconProvider : public QQuickImageProvider
+{
+public:
+    AppIconProvider();
+    QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize) override;
+
+private:
+    static void loadPixmap(const QString &id, QPixmap &pixmap);
+    static void loadDefault(QPixmap &pixmap);
+    static bool loadPixmapFromUrl(const QUrl &url, QPixmap &pixmap);
+    static bool loadPixmapFromPath(const QString &path, QPixmap &pixmap);
+    static bool loadPixmapFromTheme(const QString &name, QPixmap &pixmap);
+
+private:
+    static QSize s_defaultSize;
+};
+
+} // UkuiMenu
+
+#endif //UKUI_MENU_APP_ICON_PROVIDER_H

src/ukui-menu-application.cpp

@@ -22,6 +22,7 @@
 #include "model-manager.h"
 #include "color-helper.h"
 #include "theme-palette.h"
+#include "app-icon-provider.h"
 
 #include <QCoreApplication>
 #include <QCommandLineParser>
@@ -67,6 +68,9 @@ void UkuiMenuApplication::initQmlEngine()
 
     m_applicationEngine->addImportPath("qrc:/qml");
 
+    // icon provider
+    m_applicationEngine->addImageProvider("appicon", new AppIconProvider());
+
     m_applicationEngine->rootContext()->setContextProperty("colorHelper", ColorHelper::instance());
     m_applicationEngine->rootContext()->setContextProperty("themePalette", ThemePalette::getInstance());
     m_applicationEngine->rootContext()->setContextProperty("menuSetting", MenuSetting::instance());