if our USB device is disconnected while prompting the user for ADBD, cancel the prompt.

1 files changed, 81 insertions, 0 deletions

diff --git a/src/usb-monitor.cpp b/src/usb-monitor.cpp
new file mode 100644
index 0000000..5fc5a6d
--- /dev/null
+++ b/src/usb-monitor.cpp
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2016 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, 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 <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ */
+
+#include <src/usb-monitor.h>
+
+#include <glib.h>
+#include <gudev/gudev.h>
+
+class GUDevUsbMonitor::Impl
+{
+public:
+ 
+    Impl()
+    {
+        const char* subsystems[] = {"android_usb", nullptr};
+        m_udev_client = g_udev_client_new(subsystems);
+        g_signal_connect(m_udev_client, "uevent", G_CALLBACK(on_android_usb_event), this);
+    }
+
+    ~Impl()
+    {
+        g_signal_handlers_disconnect_by_data(m_udev_client, this);
+        g_clear_object(&m_udev_client);
+    }
+
+    core::Signal<const std::string&>& on_usb_disconnected()
+    {
+        return m_on_usb_disconnected;
+    }
+
+private:
+
+    static void on_android_usb_event(GUdevClient*, gchar* action, GUdevDevice* device, gpointer gself)
+    {
+        if (!g_strcmp0(action, "change"))
+            if (!g_strcmp0(g_udev_device_get_property(device, "USB_STATE"), "DISCONNECTED"))
+                static_cast<Impl*>(gself)->m_on_usb_disconnected(g_udev_device_get_name(device));
+    }
+
+    core::Signal<const std::string&> m_on_usb_disconnected;
+
+    GUdevClient* m_udev_client = nullptr;
+};
+
+/***
+****
+***/
+
+UsbMonitor::UsbMonitor() =default;
+
+UsbMonitor::~UsbMonitor() =default;
+
+GUDevUsbMonitor::GUDevUsbMonitor():
+    impl{new Impl{}}
+{
+}
+
+GUDevUsbMonitor::~GUDevUsbMonitor() =default;
+
+core::Signal<const std::string&>&
+GUDevUsbMonitor::on_usb_disconnected()
+{
+    return impl->on_usb_disconnected();
+}
+