Add autogen button class - still needs autogen for platform specific buttons

Author: rhempel

templates/button-class.liquid

@@ -0,0 +1,89 @@
+{%
+assign class_name = currentClass.friendlyName | camel_case | capitalize %}{%
+comment %}{%
+if currentClass.systemDeviceNameConvention %}{%
+    assign device_name_convention = currentClass.systemDeviceNameConvention | replace: '\{\d\}', '*' %}{%
+else %}{%
+    assign device_name_convention = '*' %}{%
+endif %}{%
+if currentClass.inheritance %}{%
+    assign base_class = currentClass.inheritance | camel_case | capitalize %}{%
+else %}{%
+    assign base_class = 'Device' %}{%
+endif%}{%
+assign driver_name = "" %}{%
+if currentClass.driverName %}{%
+    for name in currentClass.driverName %}{%
+        capture driver_name %}{{ driver_name }}, '{{name}}'{% endcapture %}{%
+    endfor %}{%
+    capture driver_name %} driver_name=[{{ driver_name | remove_first:', ' }}],{% endcapture %}{%
+endif %}{% endcomment %}
+import fcntl
+import array
+
+class {{ class_name }}({{ base_class }}):
+
+    """{% for line in currentClass.description %}
+    {{ line }}{% endfor %}
+    """
+
+    KEY_MAX = 0x2FF
+    KEY_BUF_LEN = int((KEY_MAX + 7) / 8)
+    EVIOCGKEY = (2 << (14 + 8 + 8) | KEY_BUF_LEN << (8 + 8) | ord('E') << 8 | 0x18)
+
+    def __init__(self):
+        self._buf = array.array( 'B', [0] * self.KEY_BUF_LEN )
+        self.filehandle_cache = {}
+
+    def _button_file(self, name):
+        if name not in self.filehandle_cache:
+            f = open( name, 'r' )
+            self.filehandle_cache[name] = f
+        else:
+            f = self.filehandle_cache[name]
+        return f
+
+    def read_button(self, name, button):
+        ret = fcntl.ioctl(self._button_file('/dev/input/by-path/platform-gpio-keys.0-event'), self.EVIOCGKEY, self._buf)
+        if (ret < 0):
+            return None
+	else:
+            return not bool(self._buf[int(button / 8)] & 1 << button % 8)
+
+    @property
+    def up(self):
+        return self.read_button( 'platform-gpio-keys.0-event', 103 )
+
+    @property
+    def down(self):
+        return self.read_button( 'platform-gpio-keys.0-event', 108 )
+
+    @property
+    def left(self):
+        return self.read_button( 'platform-gpio-keys.0-event', 105 )
+
+    @property
+    def right(self):
+        return self.read_button( 'platform-gpio-keys.0-event', 106 )
+
+    @property
+    def enter(self):
+        return self.read_button( 'platform-gpio-keys.0-event', 28 )
+
+    @property
+    def backspace(self):
+        return self.read_button( 'platform-gpio-keys.0-event', 14 )
+
+{% comment %}
+{% if currentClass.inheritance %}
+    SYSTEM_CLASS_NAME = {{ base_class }}.SYSTEM_CLASS_NAME
+    SYSTEM_DEVICE_NAME_CONVENTION = {{ base_class }}.SYSTEM_DEVICE_NAME_CONVENTION
+{% else %}
+    SYSTEM_CLASS_NAME = '{{ currentClass.systemClassName }}'
+    SYSTEM_DEVICE_NAME_CONVENTION = '{{ device_name_convention }}'
+{% endif %}
+    def __init__(self, port=None, name=SYSTEM_DEVICE_NAME_CONVENTION, **kwargs):
+        if port is not None:
+            kwargs['port_name'] = port
+        Device.__init__(self, self.SYSTEM_CLASS_NAME, name,{{ driver_name }} **kwargs)
+{% endcomment %}