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# SPDX-FileCopyrightText: Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# SPDX-License-Identifier: GPL-3.0-or-later
"""Navigation (back/forward) indicator displayed in the statusbar."""
from qutebrowser.mainwindow.statusbar import textbase
class Backforward(textbase.TextBase):
"""Shows navigation indicator (if you can go backward and/or forward)."""
def __init__(self, parent=None):
super().__init__(parent)
self.enabled = False
def on_tab_cur_url_changed(self, tabs):
"""Called on URL changes."""
tab = tabs.widget.currentWidget()
if tab is None: # pragma: no cover
self.setText('')
self.hide()
return
self.on_tab_changed(tab)
def on_tab_changed(self, tab):
"""Update the text based on the given tab."""
text = ''
if tab.history.can_go_back():
text += '<'
if tab.history.can_go_forward():
text += '>'
if text:
text = '[' + text + ']'
self.setText(text)
self.setVisible(bool(text) and self.enabled)
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