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"""The BrowserView manages a set of BrowserColumns."""
from . import Widget
from .browsercolumn import BrowserColumn
from .pager import Pager
from ..displayable import DisplayableContainer
class BrowserView(Widget, DisplayableContainer):
ratios = None
preview = True
preview_available = True
stretch_ratios = None
need_clear = False
def __init__(self, win, ratios, preview = True):
DisplayableContainer.__init__(self, win)
from functools import reduce
self.ratios = ratios
self.preview = preview
# normalize ratios:
ratio_sum = float(reduce(lambda x,y: x + y, ratios))
self.ratios = tuple(map(lambda x: x / ratio_sum, 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 preview: offset += 1
for level in range(len(ratios)):
fl = BrowserColumn(self.win, level + offset)
self.add_child(fl)
try:
self.main_column = self.container[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.pager = Pager(self.win, embedded=True)
self.add_child(self.pager)
def draw(self):
if str(self.env.keybuffer) in ("`", "'"):
self._draw_bookmarks()
else:
if self.need_clear:
self.win.erase()
self.need_redraw = True
self.need_clear = False
DisplayableContainer.draw(self)
def _draw_bookmarks(self):
self.need_clear = True
sorted_bookmarks = sorted(self.fm.bookmarks)
def generator():
return zip(range(self.hei), sorted_bookmarks)
try:
maxlen = max(len(item[1].path) for i, item in generator())
except ValueError:
return
maxlen = min(maxlen + 5, self.wid)
for line, items in generator():
key, mark = items
string = " " + key + ": " + mark.path
self.addnstr(line, 0, string.ljust(maxlen), self.wid)
def resize(self, y, x, hei, wid):
"""Resize all the columns according to the given ratio"""
DisplayableContainer.resize(self, y, x, hei, wid)
left = 0
cut_off_last = self.preview and not self.preview_available \
and self.stretch_ratios
if cut_off_last:
generator = zip(self.stretch_ratios, range(len(self.ratios)))
else:
generator = zip(self.ratios, range(len(self.ratios)))
last_i = len(self.ratios) - 1
for ratio, i in generator:
wid = int(ratio * self.wid)
if i == last_i:
wid = int(self.wid - left + 1)
if i == last_i - 1:
self.pager.resize(0, left, hei, max(1, self.wid - left))
try:
self.container[i].resize(0, left, hei, max(1, wid-1))
except KeyError:
pass
left += wid
def click(self, event):
n = event.ctrl() and 1 or 3
if event.pressed(4):
self.fm.scroll(relative = -n)
elif event.pressed(2) or event.key_invalid():
self.fm.scroll(relative = n)
else:
DisplayableContainer.click(self, event)
def open_pager(self):
self.pager.visible = True
self.pager.focused = True
self.pager.open()
try:
self.container[-2].visible = False
self.container[-3].visible = False
except IndexError:
pass
def close_pager(self):
self.pager.visible = False
self.pager.focused = False
self.pager.close()
try:
self.container[-2].visible = True
self.container[-3].visible = True
except IndexError:
pass
def poke(self):
DisplayableContainer.poke(self)
if self.settings.collapse_preview and self.preview:
has_preview = self.container[-2].has_preview()
if self.preview_available != has_preview:
self.preview_available = has_preview
self.resize(self.y, self.x, self.hei, self.wid)
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