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# This file is part of ranger, the console file manager.
# License: GNU GPL version 3, see the file "AUTHORS" for details.
from __future__ import (absolute_import, division, print_function)
from ranger import PY3
from ranger.ext.widestring import WideString, utf_char_width
class Bar(object):
left = None
right = None
gap = None
def __init__(self, base_color_tag):
self.left = BarSide(base_color_tag)
self.right = BarSide(base_color_tag)
self.gap = BarSide(base_color_tag)
def add(self, *a, **kw):
self.left.add(*a, **kw)
def addright(self, *a, **kw):
self.right.add(*a, **kw)
def sumsize(self):
return self.left.sumsize() + self.right.sumsize()
def fixedsize(self):
return self.left.fixedsize() + self.right.fixedsize()
def shrink_by_removing(self, wid):
leftsize = self.left.sumsize()
rightsize = self.right.sumsize()
sumsize = leftsize + rightsize
# remove elements from the left until it fits
if sumsize > wid:
while self.left:
leftsize -= len(self.left.pop(-1))
if leftsize + rightsize <= wid:
break
sumsize = leftsize + rightsize
# remove elements from the right until it fits
if sumsize > wid:
while self.right:
rightsize -= len(self.right.pop(0))
if leftsize + rightsize <= wid:
break
sumsize = leftsize + rightsize
if sumsize < wid:
self.fill_gap(' ', (wid - sumsize), gapwidth=True)
def shrink_from_the_left(self, wid):
fixedsize = self.fixedsize()
if wid < fixedsize:
raise ValueError("Cannot shrink down to that size by cutting")
leftsize = self.left.sumsize()
rightsize = self.right.sumsize()
oversize = leftsize + rightsize - wid
if oversize <= 0:
return self.fill_gap(' ', wid, gapwidth=False)
# Shrink items to a minimum size until there is enough room.
for item in self.left:
if not item.fixed:
itemlen = len(item)
if oversize > itemlen - item.min_size:
item.cut_off_to(item.min_size)
oversize -= (itemlen - item.min_size)
else:
item.cut_off(oversize)
break
return None
def fill_gap(self, char, wid, gapwidth=False):
del self.gap[:]
if not gapwidth:
wid = wid - self.sumsize()
if wid > 0:
self.gap.add(char * wid, 'space')
def combine(self):
return self.left + self.gap + self.right
class BarSide(list):
def __init__(self, base_color_tag): # pylint: disable=super-init-not-called
self.base_color_tag = base_color_tag
def add(self, string, *lst, **kw):
colorstr = ColoredString(string, self.base_color_tag, *lst)
colorstr.__dict__.update(kw)
self.append(colorstr)
def add_space(self, n=1):
self.add(' ' * n, 'space')
def sumsize(self):
return sum(len(item) for item in self)
def fixedsize(self):
n = 0
for item in self:
if item.fixed:
n += len(item)
else:
n += item.min_size
return n
class ColoredString(object):
def __init__(self, string, *lst):
self.string = WideString(string)
self.lst = lst
self.fixed = False
if not string or not self.string.chars:
self.min_size = 0
elif PY3:
self.min_size = utf_char_width(string[0])
else:
self.min_size = utf_char_width(self.string.chars[0].decode('utf-8'))
def cut_off(self, n):
if n >= 1:
self.string = self.string[:-n]
def cut_off_to(self, n):
if n < self.min_size:
self.string = self.string[:self.min_size]
elif n < len(self.string):
self.string = self.string[:n]
def __len__(self):
return len(self.string)
def __str__(self):
return str(self.string)
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