addet qfc not as a submodule

.qfc/qfc/readchar.py

@@ -0,0 +1,65 @@
+import sys
+import tty
+import termios
+import fcntl
+import os
+from . import keys
+
+
+def get_symbol():
+    ''' Read a symbol, which can be a single byte character or a multibyte string'''
+    ch = read_char()
+    ch_code = ord(ch)
+    # check for multibyte string
+    if ch_code == keys.ESC:
+        ch = read_char_no_blocking()
+        if ch == '':
+            # ESC key pressed
+            return keys.ESC
+        elif ch != 'O' and ch != '[':
+            return ord(ch)
+        else:
+            ch = read_char_no_blocking()
+            if ch == 'A':
+                return keys.UP
+            elif ch == 'B':
+                return keys.DOWN
+            elif ch == 'C':
+                return keys.RIGHT
+            elif ch == 'D':
+                return keys.LEFT
+            elif ch == 'Z':
+                return keys.SHIFTTAB
+    return ch_code
+
+
+def read_char():
+    ''' Read a character '''
+    fd = sys.stdin.fileno()
+    old_settings = termios.tcgetattr(fd)
+    try:
+        tty.setraw(fd, termios.TCSADRAIN)
+        ch = sys.stdin.read(1)
+    finally:
+        termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+    return ch
+
+
+def read_char_no_blocking():
+    ''' Read a character in nonblocking mode, if no characters are present in the buffer, return an empty string '''
+    fd = sys.stdin.fileno()
+    old_settings = termios.tcgetattr(fd)
+    old_flags = fcntl.fcntl(fd, fcntl.F_GETFL)
+    try:
+        tty.setraw(fd, termios.TCSADRAIN)
+        fcntl.fcntl(fd, fcntl.F_SETFL, old_flags | os.O_NONBLOCK)
+        return sys.stdin.read(1)
+    except IOError as e:
+        ErrorNumber = e[0]
+        # IOError with ErrorNumber 11(35 in Mac)  is thrown when there is nothing to read(Resource temporarily unavailable)
+        if (sys.platform.startswith("linux") and ErrorNumber != 11) or (sys.platform == "darwin" and ErrorNumber != 35):
+            raise
+        return ""
+    finally:
+        fcntl.fcntl(fd, fcntl.F_SETFL, old_flags)
+        termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)