"""The FileList widget displays the contents of a directory or file."""
from . import Widget
class FileList(Widget):
main_display = False
display_infostring = False
scroll_begin = 0
target = None
def __init__(self, win, level):
Widget.__init__(self, win)
self.level = level
def click(self, event):
"""Handle a MouseEvent"""
from ranger.fsobject.fsobject import T_DIRECTORY
if not (event.pressed(1) or event.pressed(3)):
return False
if self.target is None:
pass
elif self.target.type is T_DIRECTORY:
index = self.scroll_begin + event.y - self.y
if event.pressed(1):
if not self.main_display:
self.fm.enter_dir(self.target.path)
if index < len(self.target):
self.fm.move_pointer(absolute = index)
elif event.pressed(3):
try:
clicked_file = self.target[index]
self.fm.enter_dir(clicked_file.path)
except:
pass
else:
if self.level > 0:
self.fm.move_right()
return True
def has_preview(self):
from ranger.fsobject.file import File
from ranger.fsobject.directory import Directory
if self.target is None:
return False
if isinstance(self.target, File):
if not self.settings.preview_files:
return False
return True
def poke(self):
self.target = self.env.at_level(self.level)
def draw(self):
"""Call either draw_file() or draw_directory()"""
from ranger.fsobject.file import File
from ranger.fsobject.directory import Directory
if self.target is None:
pass
elif type(self.target) == File:
self.draw_file()
elif type(self.target) == Directory:
self.draw_directory()
# else:
# self.win.addnstr(self.y, self.x, "unknown type.", self.wid)
def draw_file(self):
"""Draw a preview of the file, if the settings allow it"""
if not self.target.accessible:
self.win.addnstr(self.y, self.x, "not accessible", self.wid)
return
if self.settings.preview_files:
try:
if self.target.size < 1024 * 20:
f = open(self.target.path, 'r')
for line in range(self.hei):
read = f.readline().expandtabs()
self.win.addnstr(self.y + line, self.x, read, self.wid)
except:
pass
def draw_directory(self):
"""Draw the contents of a directory"""
from ranger.fsobject.directory import Directory
import stat
self.target.use()
self.target.load_content_if_outdated()
self.target.sort_if_outdated()
base_color = ['in_display']
if self.main_display:
base_color.append('maindisplay')
if not self.target.accessible:
self.color(base_color, 'error')
self.win.addnstr(self.y, self.x, "not accessible", self.wid)
self.color_reset()
return
if self.target.empty():
self.color(base_color, 'empty')
self.win.addnstr(self.y, self.x, "empty", self.wid)
self.color_reset()
return
self.set_scroll_begin()
selected_i = self.target.pointed_index
for line in range(self.hei):
i = line + self.scroll_begin
try:
drawed = self.target[i]
except IndexError:
break
this_color = base_color + list(drawed.mimetype_tuple)
if i == selected_i:
this_color.append('selected')
if isinstance(drawed, Directory):
this_color.append('directory')
else:
this_color.append('file')
if drawed.stat is not None and drawed.stat.st_mode & stat.S_IXUSR:
this_color.append('executable')
if drawed.islink:
this_color.append('link')
string = drawed.basename
if self.main_display:
self.win.addnstr(
self.y + line, self.x + 1, drawed.basename, self.wid - 2)
else:
self.win.addnstr(
self.y + line, self.x, drawed.basename, self.wid)
if self.display_infostring and drawed.infostring:
info = drawed.infostring
x = self.x + self.wid - 1 - len(info)
if x > self.x:
self.win.addstr(self.y + line, x, str(info) + ' ')
self.color_at(self.y + line, self.x, self.wid, this_color)
self.color_reset()
def get_scroll_begin(self):
"""Determines scroll_begin (the position of the first displayed file)"""
offset = self.settings.scroll_offset
dirsize = len(self.target)
winsize = self.hei
halfwinsize = winsize // 2
index = self.target.pointed_index or 0
original = self.target.scroll_begin
projected = index - original
upper_limit = winsize - 1 - offset
lower_limit = offset
if original < 0:
return 0
if dirsize < winsize:
return 0
if halfwinsize < offset:
return min( dirsize - winsize, max( 0, index - halfwinsize ))
if original > dirsize - winsize:
self.target.scroll_begin = dirsize - winsize
return self.get_scroll_begin()
if projected < upper_limit and projected > lower_limit:
return original
if projected > upper_limit:
return min( dirsize - winsize,
original + (projected - upper_limit))
if projected < upper_limit:
return max( 0,
original - (lower_limit - projected))
return original
def set_scroll_begin(self):
"""Updates the scroll_begin value"""
self.scroll_begin = self.get_scroll_begin()
self.target.scroll_begin = self.scroll_begin
# TODO: does not work if options.scroll_offset is high,
# relative > 1 and you scroll from scroll_begin = 1 to 0
def scroll(self, relative):
"""scroll by n lines"""
self.set_scroll_begin()
old_value = self.target.scroll_begin
self.target.scroll_begin += relative
self.set_scroll_begin()
if self.target.scroll_begin == old_value:
self.target.move_pointer(relative = relative)
self.target.scroll_begin += relative