Merge pull request #20 from avatao-content/webide-directories

Implement support for changing working directory in webide

lib/tfw/components/source_code_event_handler.py

@@ -1,4 +1,4 @@
-from os.path import isfile, join, relpath
+from os.path import isfile, join, relpath, exists, isdir
 from glob import glob
 
 from tfw.event_handler_base import TriggerlessEventHandler
@@ -9,11 +9,22 @@ log = logging.getLogger(__name__)
 
 
 class FileManager:
-    def __init__(self, working_directory, selected_file=None):
-        self.exclude = ['__pycache__']
-        self._workdir = working_directory
+    def __init__(self, working_directory, selected_file=None, exclude=None):
+        self.exclude = exclude if exclude is not None else []
+        self._workdir = None
+        self.workdir = working_directory
         self.filename = selected_file or self.files[0]
 
+    @property
+    def workdir(self):
+        return self._workdir
+
+    @workdir.setter
+    def workdir(self, directory):
+        if not exists(directory) or not isdir(directory):
+            raise EnvironmentError('"{}" is not a directory!'.format(directory))
+        self._workdir = directory
+
     def select_file(self, filename):
         if not filename in self.files:
            raise EnvironmentError('No such file in workdir!')
@@ -43,23 +54,29 @@ class FileManager:
 
 
 class SourceCodeEventHandler(TriggerlessEventHandler):
-    def __init__(self, key, directory, selected_file=None):
+    def __init__(self, key, directory, selected_file=None, exclude=None):
         super().__init__(key)
-        self.filemanager = FileManager(directory, selected_file=selected_file)
+        self.filemanager = FileManager(directory, selected_file=selected_file, exclude=exclude)
 
-        self.commands = {
-            'read': self.read,
+        self.commands = {'read':      self.read,
                          'write':     self.write,
-            'select': self.select
-        }
+                         'select':    self.select,
+                         'selectdir': self.select_dir}
 
-        self._monitor = DirectoryMonitor(directory)
-        self._monitor.watch()    # This runs on a separate thread
+        self._monitor = None
+        self.reload_monitor()
 
     @property
     def monitor(self):
         return self._monitor
 
+    def reload_monitor(self):
+        if self._monitor:
+            try: self._monitor.stop()
+            except KeyError: logging.debug('Working directory was removed – ignoring...')
+        self._monitor = DirectoryMonitor(self.filemanager.workdir)
+        self._monitor.watch()   # This runs on a separate thread
+
     def read(self, data):
         try: data['content'] = self.filemanager.file_contents
         except PermissionError: data['content'] = 'You have no permission to open that file :('
@@ -79,9 +96,23 @@ class SourceCodeEventHandler(TriggerlessEventHandler):
         except EnvironmentError: log.exception('Failed to select file "{}"'.format(data['filename']))
         return data
 
+    def select_dir(self, data):
+        try:
+            self.filemanager.workdir = data['directory']
+            self.reload_monitor()
+            try:
+                self.filemanager.select_file(self.filemanager.files[0])
+                self.read(data)
+            except IndexError:
+                data['content'] = 'No files in this directory :('
+        except EnvironmentError:
+            log.exception('Failed to select directory "{}"'.format(data['directory']))
+        return data
+
     def attach_fileinfo(self, data):
         data['filename'] = self.filemanager.filename
         data['files'] = self.filemanager.files
+        data['directory'] = self.filemanager.workdir
 
     def handle_event(self, key, message):
         try:

src/demo/event_handler_main.py

@@ -9,10 +9,10 @@ log = logging.getLogger(__name__)
 
 
 if __name__ == '__main__':
-    ide = SourceCodeEventHandler('webide', tfwenv.WEBIDE_WD)
-    terminado = TerminadoEventHandler('shell')
-    terminado.historymonitor.subscribe_callback(lambda hist: log.debug('User executed command: "{}"'.format(hist[-1])))
-    processmanager = ProcessManagingEventHandler('processmanager', ide.monitor)
+    ide = SourceCodeEventHandler(key='webide', directory=tfwenv.WEBIDE_WD, exclude=['__pycache__'])
+    terminado = TerminadoEventHandler(key='shell')
+    terminado.historymonitor.subscribe_callback(callback=lambda hist: log.debug('User executed command: "{}"'.format(hist[-1])))
+    processmanager = ProcessManagingEventHandler(key='processmanager', dirmonitor=ide.monitor)
 
     eventhandlers = {ide, terminado, processmanager}
     try: