Refactoring and clean up

src/swayswitch

@@ -18,7 +18,7 @@ import wx
 
 class SwaySwitch(wx.Frame):  # pylint: disable=no-member
     """Frame for the swayswitcher"""
-    def __init__(self, *args, **kw):  # pylint: disable=unused-argument,too-many-locals,too-many-branches,too-many-statements
+    def __init__(self, *args, **kw):  # pylint: disable=unused-argument
         """Constructor"""
         wx.Frame.__init__(self, None, title="", style=wx.STAY_ON_TOP)  # pylint: disable=no-member
         # create a panel in the frame
@@ -26,7 +26,27 @@ class SwaySwitch(wx.Frame):  # pylint: disable=no-member
 
         # Some xdg data
         self.home = os.environ.get('HOME')
-        self.base_dirs = []
+        self.base_dirs = self.get_base_dirs()
+        # get windows from sway
+        windows = get_windows()
+
+        # Get config
+        self.label_len = 20
+        self.icon_size = 128
+
+        self.icon_dirs = self.get_icon_dirs()
+
+        # and create a sizer to manage the layout of child widgets
+        x_and_y = int(math.sqrt(len(windows)) + 0.5)
+        self.sizer = wx.GridSizer(x_and_y)  # pylint: disable=no-member
+        self.pnl.SetSizer(self.sizer)
+        self.set_buttons(windows)
+        self.sizer.Fit(self)
+        self.sizer.Layout()
+
+    def get_base_dirs(self):
+        """We want to follow the XDG standard if possible"""
+        base_dirs = []
         xdg_dirs = os.environ.get('XDG_DATA_DIRS')
         pos_dirs = []
         if xdg_dirs:
@@ -39,104 +59,49 @@ class SwaySwitch(wx.Frame):  # pylint: disable=no-member
             ]
         for pos_dir in pos_dirs:
             if os.path.exists(pos_dir):
-                self.base_dirs.append(pos_dir)
+                base_dirs.append(pos_dir)
+        return base_dirs
 
-        # get windows from sway
+    def get_desktop_file(self, command):
-        windows = get_windows()
+        """From here we return first dektopfile"""
-        label_len = 20
+        desktop_file = None
-
+        for base_dir in self.base_dirs:
-        # Icon size
+            directory = base_dir + "/applications"
-        self.icon_size = 128
+            if os.path.exists(directory):
-
+                command = "grep -s -l {} {}/*.desktop".format(
-        # and create a sizer to manage the layout of child widgets
+                    command, directory)
-        x_and_y = int(math.sqrt(len(windows)) + 0.5)
+                for data in [i for i in run_command(command) if i]:
-        sizer = wx.GridSizer(x_and_y)  # pylint: disable=no-member
+                    for result in data.decode().split('\n'):
-        self.pnl.SetSizer(sizer)
+                        desktop_file = result
-        for window in windows:
+                        break
-            inner_sizer = wx.BoxSizer(orient=wx.VERTICAL)  # pylint: disable=no-member
+        return desktop_file
-            try:
-                label = window['window_properties']['class']
-            except KeyError:
-                try:
-                    label = window['app_id']
-                    if len(label) < label_len:
-                        label = label + ':' + window['name'][:label_len -
-                                                             len(label)]
-                except KeyError:
-                    label = window['name']
-                if len(label) > label_len:
-                    label = label[:label_len]
 
-            # This is setting up an inner sizer with a static text label and an image icon
+    def get_icon_bitmap(self, icon):
-            label = "ws" + str(window['workspace']) + ": " + label
+        """Create a bitmap with right size from svg or png"""
-            winid = window['id']
-            size = wx.Window.GetFont(self).GetPointSize() * label_len  # pylint: disable=no-member
-            command = get_command(window['pid'])
-            desktop_file = self.get_desktop_file(command)
-            icon = self.get_icon(desktop_file)  # pylint: disable=no-member
         if icon:
             if icon.endswith(".svg"):
                 svgpng = cairosvg.svg2png(
                     bytestring=open(icon).read().encode('utf-8'))
                 image = wx.Image(BytesIO(svgpng), wx.BITMAP_TYPE_PNG)  # pylint: disable=no-member
             else:
-                    unscaled_bitmap = wx.Bitmap(self.get_icon(desktop_file))  # pylint: disable=no-member
+                unscaled_bitmap = wx.Bitmap(icon)  # pylint: disable=no-member
                 image = unscaled_bitmap.ConvertToImage()
             image = image.Scale(self.icon_size, self.icon_size,
                                 wx.IMAGE_QUALITY_HIGH)  # pylint: disable=no-member
             bitmap = wx.Bitmap(image)  # pylint: disable=no-member
         else:
             bitmap = wx.Bitmap()  # pylint: disable=no-member
-            btn = wx.BitmapButton(  # pylint: disable=no-member
+        return bitmap
-                self.pnl,
-                id=winid,
-                bitmap=bitmap,
-                size=wx.Size(size, size))  # pylint: disable=no-member
-            btn.Bind(
-                wx.EVT_BUTTON,
-                lambda event, mwinid=winid: self.switch_window(event, mwinid))
-            # Set up esc keybinding
-            self.Bind(wx.EVT_CHAR_HOOK, lambda event: self.on_key_press(event))  # pylint: disable=unnecessary-lambda
-            statictext = wx.StaticText(self.pnl, -1, label)  # pylint: disable=no-member
-            inner_sizer.Add(statictext, 0, wx.ALIGN_CENTER)  # pylint: disable=no-member
-            inner_sizer.Add(btn, 0, wx.ALIGN_CENTER)  # pylint: disable=no-member
-            inner_sizer.Fit(self)
-            inner_sizer.Layout()
-            sizer.Add(inner_sizer, 0, wx.ALIGN_CENTER)  # pylint: disable=no-member
-        sizer.Fit(self)
-        sizer.Layout()
 
-    def get_desktop_file(self, command):
+    def get_icon_path(self, desktop_file):
-        """From here we return first dektopfile"""
+        """Glue function to get icon path"""
-        desktop_file = None
+        icon_name = get_icon_name(desktop_file)
-        for base_dir in self.base_dirs:
+        pos_icons = self.get_pos_icons(icon_name)
-            directory = base_dir + "/applications"
+        icon_path = self.get_right_size_icon(pos_icons)
-            if os.path.exists(directory):
+        return icon_path
-                command = "grep -s -l {} {}/*.desktop".format(
-                    command, directory)
-                process = subprocess.Popen(command,
-                                           shell=True,
-                                           stdout=subprocess.PIPE,
-                                           stderr=subprocess.PIPE)
-                for data in [i for i in process.communicate() if i]:
-                    for result in data.decode().split('\n'):
-                        desktop_file = result
-                        break
-        return desktop_file
 
-    def get_icon(self, desktop_file): # pylint: disable=too-many-branches
+    def get_icon_dirs(self):
-        """ Find icon from a desktop file"""
+        """Find icon dirs"""
-        command = "grep Icon= {}".format(desktop_file)
-        process = subprocess.Popen(command,
-                                   shell=True,
-                                   stdout=subprocess.PIPE,
-                                   stderr=subprocess.PIPE)
-        for data in [i.rstrip() for i in process.communicate() if i]:
-            try:
-                icon_name = data.decode().split('=')[1]
-            except IndexError:
-                return ""
-        # Find icon dirs
         icon_dirs = []
         for base_dir in [
                 directory for directory in self.base_dirs if directory
@@ -145,28 +110,48 @@ class SwaySwitch(wx.Frame):  # pylint: disable=no-member
             icon_dirs.append(directory)
         icon_dirs.append(self.home + "/.icons")
         icon_dirs.append("/usr/share/pixmaps")
+
+        return icon_dirs
+
+    def get_label(self, window):
+        """Construct the label for the window"""
+        try:
+            label = window['window_properties']['class']
+        except KeyError:
+            try:
+                label = window['app_id']
+                if len(label) < self.label_len:
+                    label = label + ':' + window['name'][:self.label_len -
+                                                         len(label)]
+            except KeyError:
+                label = window['name']
+            if len(label) > self.label_len:
+                label = label[:self.label_len]
+
+        label = "ws" + str(window['workspace']) + ": " + label
+        return label
+
+    def get_pos_icons(self, icon_name):
+        """Collect possible icons, prefer svg"""
         possible_icons = []
-        for icon_dir in [directory for directory in icon_dirs if directory]:
+        for icon_dir in [
+                directory for directory in self.icon_dirs if directory
+        ]:
             if os.path.exists(icon_dir):
                 command = "find {} -name *{}.svg".format(icon_dir, icon_name)
-                process = subprocess.Popen(command,
+                result = run_command(command)[0].split()
-                                           shell=True,
-                                           stdout=subprocess.PIPE,
-                                           stderr=subprocess.PIPE)
-                result = process.communicate()[0].split()
                 if not result:
                     command = "find {} -name *{}.png".format(
                         icon_dir, icon_name)
-                    process = subprocess.Popen(command,
+                    result = run_command(command)[0].split()
-                                               shell=True,
-                                               stdout=subprocess.PIPE,
-                                               stderr=subprocess.PIPE)
-                    result = process.communicate()[0].split()
                 for data in result:
                     icon_cand = data.decode()
                     if icon_cand not in possible_icons:
                         possible_icons.append(icon_cand)
-        # Try to find prefered size
+        return possible_icons
+
+    def get_right_size_icon(self, possible_icons):
+        """Try to find prefered size"""
         icon = None
         for pos_icon in possible_icons:
             if pos_icon.endswith(".svg"):
@@ -188,37 +173,69 @@ class SwaySwitch(wx.Frame):  # pylint: disable=no-member
         if keycode == wx.WXK_ESCAPE:  # pylint: disable=no-member
             # enter normal mode and exit
             command = 'swaymsg mode "default"'
-            subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)
+            run_command(command)
             self.Close(True)
         else:
             event.Skip(True)
 
+    def set_buttons(self, windows):
+        """Loop over windows and create buttons for them"""
+        for window in windows:
+            # This is setting up an inner sizer with a static text label and an image icon
+            inner_sizer = wx.BoxSizer(orient=wx.VERTICAL)  # pylint: disable=no-member
+            label = self.get_label(window)
+            winid = window['id']
+            size = wx.Window.GetFont(self).GetPointSize() * self.label_len  # pylint: disable=no-member
+            command = get_command(window['pid'])
+            desktop_file = self.get_desktop_file(command)
+            icon_path = self.get_icon_path(desktop_file)
+            bitmap = self.get_icon_bitmap(icon_path)
+            btn = wx.BitmapButton(  # pylint: disable=no-member
+                self.pnl,
+                id=winid,
+                bitmap=bitmap,
+                size=wx.Size(size, size))  # pylint: disable=no-member
+            btn.Bind(
+                wx.EVT_BUTTON,
+                lambda event, mwinid=winid: self.switch_window(event, mwinid))
+            # Set up esc keybinding
+            self.Bind(wx.EVT_CHAR_HOOK, lambda event: self.on_key_press(event))  # pylint: disable=unnecessary-lambda
+            statictext = wx.StaticText(self.pnl, -1, label)  # pylint: disable=no-member
+            inner_sizer.Add(statictext, 0, wx.ALIGN_CENTER)  # pylint: disable=no-member
+            inner_sizer.Add(btn, 0, wx.ALIGN_CENTER)  # pylint: disable=no-member
+            inner_sizer.Fit(self)
+            inner_sizer.Layout()
+            self.sizer.Add(inner_sizer, 0, wx.ALIGN_CENTER)  # pylint: disable=no-member
+
     def switch_window(self, event, winid):  # pylint: disable=unused-argument
         """Switches the focus to the given id and enter normalmode"""
         command = 'swaymsg [con_id={}] focus, mode "default"'.format(winid)
-        subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)
+        run_command(command)
         self.Close(True)
 
 
 def get_command(pid):
     """Returns a list of all json window objects"""
     command = "ps h c -p {} -o command".format(pid)
-    process = subprocess.Popen(command,
+    result = run_command(command)[0].rstrip().decode()
-                               shell=True,
-                               stdout=subprocess.PIPE,
-                               stderr=subprocess.PIPE)
-    result = process.communicate()[0].rstrip().decode()
     return result
 
 
+def get_icon_name(desktop_file):
+    """ Find icon from a desktop file"""
+    command = "grep Icon= {}".format(desktop_file)
+    for data in [i.rstrip() for i in run_command(command) if i]:
+        try:
+            icon_name = data.decode().split('=')[1]
+            return icon_name
+        except IndexError:
+            return ""
+
+
 def get_windows():
     """Returns a list of all json window objects"""
     command = "swaymsg -t get_tree"
-    process = subprocess.Popen(command,
+    data = json.loads(run_command(command)[0])
-                               shell=True,
-                               stdout=subprocess.PIPE,
-                               stderr=subprocess.PIPE)
-    data = json.loads(process.communicate()[0])
 
     # Select outputs that are active
     windows = []
@@ -260,6 +277,16 @@ def extract_nodes_iterative(workspace):
     return all_nodes
 
 
+def run_command(command):
+    """Run a command on system and capture result"""
+    process = subprocess.Popen(command,
+                               shell=True,
+                               stdout=subprocess.PIPE,
+                               stderr=subprocess.PIPE)
+    result = process.communicate()
+    return result
+
+
 # Entry point
 if __name__ == "__main__":
     # When this module is run (not imported) then create the app, the