Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

git-subtree-dir: meshmc
git-subtree-mainline: 934382c8a1ce738589dee9ee0f14e1cec812770e
git-subtree-split: fad6a1066616b69d7f5fef01178efdf014c59537

1 files changed, 287 insertions, 0 deletions

diff --git a/meshmc/launcher/ui/pages/global/JavaPage.cpp b/meshmc/launcher/ui/pages/global/JavaPage.cpp
new file mode 100644
index 0000000000..3b3d6b16b9
--- /dev/null
+++ b/meshmc/launcher/ui/pages/global/JavaPage.cpp
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+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   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/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "JavaPage.h"
+#include "JavaCommon.h"
+#include "ui_JavaPage.h"
+
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QDir>
+#include <QTabBar>
+#include <QTreeWidgetItem>
+#include <QDirIterator>
+
+#include "ui/dialogs/VersionSelectDialog.h"
+#ifndef MeshMC_DISABLE_JAVA_DOWNLOADER
+#include "ui/dialogs/JavaDownloadDialog.h"
+#endif
+
+#include "java/JavaUtils.h"
+#include "java/JavaInstallList.h"
+
+#include "settings/SettingsObject.h"
+#include <FileSystem.h>
+#include "Application.h"
+#include <sys.h>
+
+JavaPage::JavaPage(QWidget* parent) : QWidget(parent), ui(new Ui::JavaPage)
+{
+	ui->setupUi(this);
+
+	auto sysMiB = Sys::getSystemRam() / Sys::mebibyte;
+	ui->maxMemSpinBox->setMaximum(sysMiB);
+	loadSettings();
+#ifdef MeshMC_DISABLE_JAVA_DOWNLOADER
+	// Hide the entire Installations tab when Java downloader is disabled
+	int idx = ui->tabWidget->indexOf(ui->tabInstallations);
+	if (idx != -1)
+		ui->tabWidget->removeTab(idx);
+#else
+	refreshInstalledJavas();
+#endif
+}
+
+JavaPage::~JavaPage()
+{
+	delete ui;
+}
+
+bool JavaPage::apply()
+{
+	applySettings();
+	return true;
+}
+
+void JavaPage::applySettings()
+{
+	auto s = APPLICATION->settings();
+
+	// Memory
+	int min = ui->minMemSpinBox->value();
+	int max = ui->maxMemSpinBox->value();
+	if (min < max) {
+		s->set("MinMemAlloc", min);
+		s->set("MaxMemAlloc", max);
+	} else {
+		s->set("MinMemAlloc", max);
+		s->set("MaxMemAlloc", min);
+	}
+	s->set("PermGen", ui->permGenSpinBox->value());
+
+	// Java Settings
+	s->set("JavaPath", ui->javaPathTextBox->text());
+	s->set("JvmArgs", ui->jvmArgsTextBox->text());
+	JavaCommon::checkJVMArgs(s->get("JvmArgs").toString(),
+							 this->parentWidget());
+}
+void JavaPage::loadSettings()
+{
+	auto s = APPLICATION->settings();
+	// Memory
+	int min = s->get("MinMemAlloc").toInt();
+	int max = s->get("MaxMemAlloc").toInt();
+	if (min < max) {
+		ui->minMemSpinBox->setValue(min);
+		ui->maxMemSpinBox->setValue(max);
+	} else {
+		ui->minMemSpinBox->setValue(max);
+		ui->maxMemSpinBox->setValue(min);
+	}
+	ui->permGenSpinBox->setValue(s->get("PermGen").toInt());
+
+	// Java Settings
+	ui->javaPathTextBox->setText(s->get("JavaPath").toString());
+	ui->jvmArgsTextBox->setText(s->get("JvmArgs").toString());
+}
+
+void JavaPage::on_javaDetectBtn_clicked()
+{
+	JavaInstallPtr java;
+
+	VersionSelectDialog vselect(APPLICATION->javalist().get(),
+								tr("Select a Java version"), this, true);
+	vselect.setResizeOn(2);
+	vselect.exec();
+
+	if (vselect.result() == QDialog::Accepted && vselect.selectedVersion()) {
+		java =
+			std::dynamic_pointer_cast<JavaInstall>(vselect.selectedVersion());
+		ui->javaPathTextBox->setText(java->path);
+	}
+}
+
+void JavaPage::on_javaBrowseBtn_clicked()
+{
+	QString raw_path =
+		QFileDialog::getOpenFileName(this, tr("Find Java executable"));
+
+	// do not allow current dir - it's dirty. Do not allow dirs that don't exist
+	if (raw_path.isEmpty()) {
+		return;
+	}
+
+	QString cooked_path = FS::NormalizePath(raw_path);
+	QFileInfo javaInfo(cooked_path);
+	;
+	if (!javaInfo.exists() || !javaInfo.isExecutable()) {
+		return;
+	}
+	ui->javaPathTextBox->setText(cooked_path);
+}
+
+void JavaPage::on_javaTestBtn_clicked()
+{
+	if (checker) {
+		return;
+	}
+	checker.reset(new JavaCommon::TestCheck(
+		this, ui->javaPathTextBox->text(), ui->jvmArgsTextBox->text(),
+		ui->minMemSpinBox->value(), ui->maxMemSpinBox->value(),
+		ui->permGenSpinBox->value()));
+	connect(checker.get(), SIGNAL(finished()), SLOT(checkerFinished()));
+	checker->run();
+}
+
+void JavaPage::checkerFinished()
+{
+	checker.reset();
+}
+
+void JavaPage::on_javaDownloadBtn_clicked()
+{
+#ifndef MeshMC_DISABLE_JAVA_DOWNLOADER
+	JavaDownloadDialog dlg(this);
+	if (dlg.exec() == QDialog::Accepted) {
+		refreshInstalledJavas();
+	}
+#endif
+}
+
+void JavaPage::on_javaRefreshBtn_clicked()
+{
+	refreshInstalledJavas();
+}
+
+void JavaPage::on_javaRemoveBtn_clicked()
+{
+	auto* item = ui->installedJavaTree->currentItem();
+	if (!item)
+		return;
+
+	QString path = item->text(2);
+	if (path.isEmpty())
+		return;
+
+	// Find the java installation root directory (parent of bin/)
+	QFileInfo fi(path);
+	QDir javaDir = fi.dir(); // bin/
+	javaDir.cdUp();			 // java root
+
+	auto result = QMessageBox::question(
+		this, tr("Remove Java Installation"),
+		tr("Are you sure you want to remove this Java installation?\n\n%1")
+			.arg(javaDir.absolutePath()),
+		QMessageBox::Yes | QMessageBox::No);
+
+	if (result != QMessageBox::Yes)
+		return;
+
+	javaDir.removeRecursively();
+	refreshInstalledJavas();
+}
+
+void JavaPage::on_javaUseBtn_clicked()
+{
+	auto* item = ui->installedJavaTree->currentItem();
+	if (!item)
+		return;
+
+	QString path = item->text(2);
+	if (!path.isEmpty()) {
+		ui->javaPathTextBox->setText(path);
+		ui->tabWidget->setCurrentIndex(0); // Switch to Settings tab
+	}
+}
+
+void JavaPage::refreshInstalledJavas()
+{
+	ui->installedJavaTree->clear();
+
+	QString javaBaseDir = JavaUtils::managedJavaRoot();
+	QDir baseDir(javaBaseDir);
+	if (!baseDir.exists())
+		return;
+
+	// Scan for java binaries under java/{vendor}/{version}/
+	QDirIterator vendorIt(javaBaseDir, QDir::Dirs | QDir::NoDotAndDotDot);
+	while (vendorIt.hasNext()) {
+		vendorIt.next();
+		QString vendorName = vendorIt.fileName();
+		QString vendorPath = vendorIt.filePath();
+
+		QDirIterator versionIt(vendorPath, QDir::Dirs | QDir::NoDotAndDotDot);
+		while (versionIt.hasNext()) {
+			versionIt.next();
+			QString versionPath = versionIt.filePath();
+
+			// Look for java binary
+#if defined(Q_OS_WIN)
+			QString binaryName = "javaw.exe";
+#else
+			QString binaryName = "java";
+#endif
+			QDirIterator binIt(versionPath, QStringList() << binaryName,
+							   QDir::Files, QDirIterator::Subdirectories);
+			while (binIt.hasNext()) {
+				binIt.next();
+				QString javaPath = binIt.filePath();
+				if (javaPath.contains("/bin/")) {
+					auto* item = new QTreeWidgetItem(ui->installedJavaTree);
+					item->setText(0, versionIt.fileName());
+					item->setText(1, vendorName);
+					item->setText(2, javaPath);
+					break; // Only first binary per version dir
+				}
+			}
+		}
+	}
+
+	ui->installedJavaTree->resizeColumnToContents(0);
+	ui->installedJavaTree->resizeColumnToContents(1);
+}