# Copyright (C) 2009, 2010 Roman Zimbelmann <romanz@lavabit.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""The BrowserView manages a set of BrowserColumns."""
import curses
from ranger.ext.signal_dispatcher import Signal
from . import Widget
from .browsercolumn import BrowserColumn
from .pager import Pager
from ..displayable import DisplayableContainer
class BrowserView(Widget, DisplayableContainer):
ratios = None
preview = True
is_collapsed = False
draw_bookmarks = False
stretch_ratios = None
need_clear = False
old_collapse = False
def __init__(self, win, ratios, preview = True):
DisplayableContainer.__init__(self, win)
self.preview = preview
self.columns = []
self.pager = Pager(self.win, embedded=True)
self.pager.visible = False
self.add_child(self.pager)
self.change_ratios(ratios, resize=False)
for option in ('preview_directories', 'preview_files'):
self.settings.signal_bind('setopt.' + option,
self._request_clear_if_has_borders, weak=True)
self.fm.env.signal_bind('move', self.request_clear)
self.settings.signal_bind('setopt.column_ratios', self.request_clear)
def change_ratios(self, ratios, resize=True):
if isinstance(ratios, Signal):
ratios = ratios.value
for column in self.columns:
column.destroy()
self.remove_child(column)
self.columns = []
ratio_sum = float(sum(ratios))
self.ratios = tuple(x / ratio_sum for x in ratios)
if len(self.ratios) >= 2:
self.stretch_ratios = self.ratios[:-2] + \
((self.ratios[-2] + self.ratios[-1] * 0.9),
(self.ratios[-1] * 0.1))
offset = 1 - len(ratios)
if self.preview: offset += 1
for level in range(len(ratios)):
fl = BrowserColumn(self.win, level + offset)
self.add_child(fl)
self.columns.append(fl)
try:
self.main_column = self.columns[self.preview and -2 or -1]
except IndexError:
self.main_column = None
else:
self.main_column.display_infostring = True
self.main_column.main_column = True
self.resize(self.y, self.x, self.hei, self.wid)
def _request_clear_if_has_borders(self):
if self.settings.draw_borders:
self.request_clear()
def request_clear(self):
self.need_clear = True
def draw(self):
if self.draw_bookmarks:
self._draw_bookmarks()
else:
if self.need_clear:
self.win.erase()
self.need_redraw = True
self.need_clear = False
DisplayableContainer.draw(self)
if self.settings.draw_borders:
self._draw_borders()
def finalize(self):
if self.pager.visible:
try:
self.fm.ui.win.move(self.main_column.y, self.main_column.x)
except:
pass
else:
try:
x = self.main_column.x
y = self.main_column.y + self.main_column.target.pointer\
- self.main_column.scroll_begin
self.fm.ui.win.move(y, x)
except:
pass
def _draw_bookmarks(self):
self.fm.bookmarks.update_if_outdated()
self.color_reset()
self.need_clear = True
sorted_bookmarks = sorted(item for item in self.fm.bookmarks \
if self.settings.show_hidden_bookmarks or '/.' not in item[1].path)
def generator():
return zip(range(self.hei-1), sorted_bookmarks)
try:
maxlen = max(len(item[1].path) for i, item in generator())
except ValueError:
return
maxlen = min(maxlen + 5, self.wid)
whitespace = " " * maxlen
for line, items in generator():
key, mark = items
string = " " + key + ": " + mark.path
self.addstr(line, 0, whitespace)
self.addnstr(line, 0, string, self.wid)
if self.settings.draw_bookmark_borders:
self.win.hline(line+1, 0, curses.ACS_HLINE, maxlen)
if maxlen < self.wid:
self.win.vline(0, maxlen, curses.ACS_VLINE, line+1)
self.addch(line+1, maxlen, curses.ACS_LRCORNER)
def _draw_borders(self):
win = self.win
self.color('in_browser', 'border')
left_start = 0
right_end = self.wid - 1
for child in self.columns:
if not child.has_preview():
left_start = child.x + child.wid
else:
break
if not self.pager.visible:
for child in reversed(self.columns):
if not child.has_preview():
right_end = child.x - 1
else:
break
if right_end < left_start:
right_end = self.wid - 1
win.hline(0, left_start, curses.ACS_HLINE, right_end - left_start)
win.hline(self.hei - 1, left_start, curses.ACS_HLINE,
right_end - left_start)
win.vline(1, left_start, curses.ACS_VLINE, self.hei - 2)
for child in self.columns:
if not child.has_preview():
continue
if child.main_column and self.pager.visible:
win.vline(1, right_end, curses.ACS_VLINE, self.hei - 2)
break
x = child.x + child.wid
y = self.hei - 1
try:
win.vline(1, x, curses.ACS_VLINE, y - 1)
win.addch(0, x, curses.ACS_TTEE, 0)
win.addch(y, x, curses.ACS_BTEE, 0)
except:
# in case it's off the boundaries
pass
self.addch(0, left_start, curses.ACS_ULCORNER)
self.addch(self.hei - 1, left_start, curses.ACS_LLCORNER)
self.addch(0, right_end, curses.ACS_URCORNER)
self.addch(self.hei - 1, right_end, curses.ACS_LRCORNER)
def _collapse(self):
# Should the last column be cut off? (Because there is no preview)
if not self.settings.collapse_preview or not self.preview \
or not self.stretch_ratios:
return False
result = not self.columns[-1].has_preview()
target = self.columns[-1].target
if not result and target and target.is_file and \
self.fm.settings.preview_script and \
self.fm.settings.use_preview_script:
try:
result = not self.fm.previews[target.realpath]['foundpreview']
except:
return self.old_collapse
self.old_collapse = result
return result
def resize(self, y, x, hei, wid):
"""Resize all the columns according to the given ratio"""
DisplayableContainer.resize(self, y, x, hei, wid)
borders = self.settings.draw_borders
pad = 1 if borders else 0
left = pad
self.is_collapsed = self._collapse()
if self.is_collapsed:
generator = enumerate(self.stretch_ratios)
else:
generator = enumerate(self.ratios)
last_i = len(self.ratios) - 1
for i, ratio in generator:
wid = int(ratio * self.wid)
if i == last_i:
wid = int(self.wid - left + 1 - pad)
if i == last_i - 1:
self.pager.resize(pad, left, hei - pad * 2, \
max(1, self.wid - left - pad))
try:
self.columns[i].resize(pad, left, hei - pad * 2, \
max(1, wid - 1))
except KeyError:
pass
left += wid
def click(self, event):
if DisplayableContainer.click(self, event):
return True
direction = event.mouse_wheel_direction()
if direction:
self.main_column.scroll(direction)
return False
def open_pager(self):
self.pager.visible = True
self.pager.focused = True
self.need_clear = True
self.pager.open()
try:
self.columns[-1].visible = False
self.columns[-2].visible = False
except IndexError:
pass
def close_pager(self):
self.pager.visible = False
self.pager.focused = False
self.need_clear = True
self.pager.close()
try:
self.columns[-1].visible = True
self.columns[-2].visible = True
except IndexError:
pass
def poke(self):
DisplayableContainer.poke(self)
if self.preview and self.is_collapsed != self._collapse():
self.resize(self.y, self.x, self.hei, self.wid)