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from ranger.shared import FileManagerAware, EnvironmentAware, SettingsAware
class Displayable(EnvironmentAware, FileManagerAware, SettingsAware):
focused = False
visible = True
win = None
colorscheme = None
def __init__(self, win, env=None, fm=None, settings=None):
if env is not None:
self.env = env
if fm is not None:
self.fm = fm
if settings is not None:
self.settings = settings
self.x = 0
self.y = 0
self.wid = 0
self.hei = 0
self.colorscheme = self.settings.colorscheme
if win is not None:
self.win = win
def __nonzero__(self):
"""Always True"""
return True
def __contains__(self, item):
"""Is item inside the boundaries?
item can be an iterable like [y, x] or an object with x and y methods.
"""
try:
y, x = item.y, item.x
except AttributeError:
try:
y, x = item
except (ValueError, TypeError):
return False
return self.contains_point(y, x)
def color(self, keylist = None, *keys):
"""Change the colors from now on."""
keys = combine(keylist, keys)
self.win.attrset(self.colorscheme.get_attr(*keys))
def color_at(self, y, x, wid, keylist = None, *keys):
"""Change the colors at the specified position"""
keys = combine(keylist, keys)
self.win.chgat(y, x, wid, self.colorscheme.get_attr(*keys))
def color_reset(self):
"""Change the colors to the default colors"""
Displayable.color(self, 'reset')
def draw(self):
"""Draw the object. Called on every main iteration.
Containers should call draw() on their contained objects here.
Override this!
"""
def destroy(self):
"""Called when the object is destroyed.
Override this!
"""
def contains_point(self, y, x):
"""Test if the point lies within the boundaries of this object"""
return (x >= self.x and x < self.x + self.wid) and \
(y >= self.y and y < self.y + self.hei)
def click(self, event):
"""Called when a mouse key is pressed and self.focused is True.
Override this!
"""
pass
def press(self, key):
"""Called when a key is pressed and self.focused is True.
Override this!
"""
pass
def poke(self):
"""Called before drawing, even if invisible"""
def draw(self):
"""Draw displayable. Called on every main iteration if the object
is visible. Override this!
"""
pass
def finalize(self):
"""Called after every displayable is done drawing.
Override this!
"""
pass
def resize(self, y, x, hei=None, wid=None):
"""Resize the widget"""
try:
maxy, maxx = self.env.termsize
except TypeError:
pass
else:
if hei is None:
hei = maxy - y
if wid is None:
wid = maxx - x
if x < 0 or y < 0:
raise OutOfBoundsException("Starting point below zero!")
if x + wid > maxx and y + hei > maxy:
raise OutOfBoundsException("X and Y out of bounds!")
if x + wid > maxx:
raise OutOfBoundsException("X out of bounds!")
if y + hei > maxy:
raise OutOfBoundsException("Y out of bounds!")
self.x = x
self.y = y
self.wid = wid
self.hei = hei
class DisplayableContainer(Displayable):
container = None
def __init__(self, win, env=None, fm=None, settings=None):
if env is not None:
self.env = env
if fm is not None:
self.fm = fm
if settings is not None:
self.settings = settings
Displayable.__init__(self, win)
self.container = []
def poke(self):
"""Recursively called on objects in container"""
for displayable in self.container:
displayable.poke()
def draw(self):
"""Recursively called on visible objects in container"""
for displayable in self.container:
if displayable.visible:
displayable.draw()
def finalize(self):
"""Recursively called on visible objects in container"""
for displayable in self.container:
if displayable.visible:
displayable.finalize()
def get_focused_obj(self):
"""Finds a focused displayable object in the container."""
for displayable in self.container:
if displayable.focused:
return displayable
try:
obj = displayable.get_focused_obj()
except AttributeError:
pass
else:
if obj is not None:
return obj
return None
def press(self, key):
"""Recursively called on objects in container"""
focused_obj = self.get_focused_obj()
if focused_obj:
focused_obj.press(key)
return True
return False
def click(self, event):
"""Recursively called on objects in container"""
focused_obj = self.get_focused_obj()
if focused_obj and focused_obj.click(event):
return True
for displayable in self.container:
if event in displayable:
if displayable.click(event):
return True
return False
def add_obj(self, *objs):
self.container.extend(objs)
def destroy(self):
"""Recursively called on objects in container"""
for displayable in self.container:
displayable.destroy()
class OutOfBoundsException(Exception):
pass
def combine(seq, tup):
"""Add seq and tup. Ensures that the result is a tuple."""
try:
if isinstance(seq, str): raise TypeError
return tuple(tuple(seq) + tup)
except TypeError:
try:
return tuple((seq, ) + tup)
except:
return ()
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