From b6d455a02bd338e9dc0faa09d4d8177ecd8d569a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Sun, 10 Apr 2016 15:53:05 +0200
Subject: NOISSUE reorganize and document libraries

---
 api/gui/DesktopServices.cpp | 149 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 api/gui/DesktopServices.cpp

(limited to 'api/gui/DesktopServices.cpp')

diff --git a/api/gui/DesktopServices.cpp b/api/gui/DesktopServices.cpp
new file mode 100644
index 00000000..3154ea01
--- /dev/null
+++ b/api/gui/DesktopServices.cpp
@@ -0,0 +1,149 @@
+#include "DesktopServices.h"
+#include <QDir>
+#include <QDesktopServices>
+#include <QProcess>
+#include <QDebug>
+
+/**
+ * This shouldn't exist, but until QTBUG-9328 and other unreported bugs are fixed, it needs to be a thing.
+ */
+#if defined(Q_OS_LINUX)
+
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+template <typename T>
+bool IndirectOpen(T callable, qint64 *pid_forked = nullptr)
+{
+	auto pid = fork();
+	if(pid_forked)
+	{
+		if(pid > 0)
+			*pid_forked = pid;
+		else
+			*pid_forked = 0;
+	}
+	if(pid == -1)
+	{
+		qWarning() << "IndirectOpen failed to fork: " << errno;
+		return false;
+	}
+	// child - do the stuff
+	if(pid == 0)
+	{
+		// unset all this garbage so it doesn't get passed to the child process
+		qunsetenv("LD_PRELOAD");
+		qunsetenv("LD_LIBRARY_PATH");
+		qunsetenv("LD_DEBUG");
+		qunsetenv("QT_PLUGIN_PATH");
+		qunsetenv("QT_FONTPATH");
+
+		// open the URL
+		auto status = callable();
+
+		// detach from the parent process group.
+		setsid();
+
+		// die. now. do not clean up anything, it would just hang forever.
+		_exit(status ? 0 : 1);
+	}
+	else
+	{
+		//parent - assume it worked.
+		int status;
+		while (waitpid(pid, &status, 0))
+		{
+			if(WIFEXITED(status))
+			{
+				return WEXITSTATUS(status) == 0;
+			}
+			if(WIFSIGNALED(status))
+			{
+				return false;
+			}
+		}
+		return true;
+	}
+}
+#endif
+
+namespace DesktopServices {
+bool openDirectory(const QString &path, bool ensureExists)
+{
+	qDebug() << "Opening directory" << path;
+	QDir parentPath;
+	QDir dir(path);
+	if (!dir.exists())
+	{
+		parentPath.mkpath(dir.absolutePath());
+	}
+	auto f = [&]()
+	{
+		return QDesktopServices::openUrl(QUrl::fromLocalFile(dir.absolutePath()));
+	};
+#if defined(Q_OS_LINUX)
+	return IndirectOpen(f);
+#else
+	return f();
+#endif
+}
+
+bool openFile(const QString &path)
+{
+	qDebug() << "Opening file" << path;
+	auto f = [&]()
+	{
+		return QDesktopServices::openUrl(QUrl::fromLocalFile(path));
+	};
+#if defined(Q_OS_LINUX)
+	return IndirectOpen(f);
+#else
+	return f();
+#endif
+}
+
+bool openFile(const QString &application, const QString &path, const QString &workingDirectory, qint64 *pid)
+{
+	qDebug() << "Opening file" << path << "using" << application;
+#if defined(Q_OS_LINUX)
+	// FIXME: the pid here is fake. So if something depends on it, it will likely misbehave
+	return IndirectOpen([&]()
+	{
+		return QProcess::startDetached(application, QStringList() << path, workingDirectory);
+	}, pid);
+#else
+	return QProcess::startDetached(application, QStringList() << path, workingDirectory, pid);
+#endif
+}
+
+bool run(const QString &application, const QStringList &args, const QString &workingDirectory, qint64 *pid)
+{
+	qDebug() << "Running" << application << "with args" << args.join(' ');
+#if defined(Q_OS_LINUX)
+	// FIXME: the pid here is fake. So if something depends on it, it will likely misbehave
+	return IndirectOpen([&]()
+	{
+		return QProcess::startDetached(application, args, workingDirectory);
+	}, pid);
+#else
+	return QProcess::startDetached(application, args, workingDirectory, pid);
+#endif
+}
+
+bool openUrl(const QUrl &url)
+{
+	qDebug() << "Opening URL" << url.toString();
+	auto f = [&]()
+	{
+		return QDesktopServices::openUrl(url);
+	};
+#if defined(Q_OS_LINUX)
+	return IndirectOpen(f);
+#else
+	return f();
+#endif
+}
+
+}
-- 
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