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accelmap.py
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accelmap.py
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# This file is part of MyPaint.
# Copyright (C) 2014 by Andrew Chadwick <a.t.chadwick@gmail.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 2 of the License, or
# (at your option) any later version.
"""Global AccelMap editor, for backwards compatibility"""
## Imports
from __future__ import division, print_function
import logging
from lib.gibindings import Gtk
from lib.gibindings import Gdk
from lib.gibindings import Pango
from lib.gettext import gettext as _
import lib.xml
from lib.pycompat import unicode
logger = logging.getLogger(__name__)
## Class defs and funcs
class AccelMapEditor (Gtk.Grid):
"""Ugly properties list for editing the global accel map
MyPaint normally doesn't use properties lists for reasons of
simplicity. However since Gtk 3.12 these are no longer editable via
the menus themselves, so we must create an alternative for 3.12
users who want to rebind keys.
"""
# This interface is likely to evolve into an accelerator editor for
# GtkApplication's GAction-based way of doing things when we drop
# support for 3.10.
## Consts
__gtype_name__ = 'AccelMapEditor'
_COLUMN_TYPES = (str, str, str, str, str, str)
_PATH_COLUMN = 0
_ACCEL_LABEL_COLUMN = 1
_ACTION_LABEL_COLUMN = 2
_SEARCH_TEXT_COLUMN = 3
_ACCEL_LABEL_SORT_COLUMN = 4
_ACTION_LABEL_SORT_COLUMN = 5
_USE_NORMAL_DIALOG_KEYS = True
_SHOW_ACCEL_PATH = True
_ACTION_LABEL_COLUMN_TEMPLATE = \
u"<b>{action_label}</b><small>\n" \
u"{action_desc}</small>"
_ACTION_LABEL_SORT_COLUMN_TEMPLATE = u"{action_label}\n{action_desc}"
_ACCEL_LABEL_COLUMN_TEMPLATE = u"<big><b>{accel_label}</b></big>"
_ACCEL_LABEL_SORT_COLUMN_TEMPLATE = u"{accel_label}"
_SEARCH_TEXT_COLUMN_TEMPLATE = \
u"{action_label} {action_desc} {accel_label}"
## Setup
def __init__(self):
super(AccelMapEditor, self).__init__()
self.ui_manager = None
self.connect("show", self._show_cb)
store = Gtk.ListStore(*self._COLUMN_TYPES)
self._store = store
self._action_labels = {}
self._accel_labels = {}
scrolls = Gtk.ScrolledWindow()
scrolls.set_shadow_type(Gtk.ShadowType.IN)
view = Gtk.TreeView()
view.set_model(store)
view.set_size_request(480, 320)
view.set_hexpand(True)
view.set_vexpand(True)
scrolls.add(view)
self.attach(scrolls, 0, 0, 1, 1)
view.set_headers_clickable(True)
view.set_enable_search(True)
view.set_search_column(self._SEARCH_TEXT_COLUMN)
view.set_search_equal_func(self._view_search_equal_cb)
self._view = view
cell = Gtk.CellRendererText()
cell.set_property("ellipsize", Pango.EllipsizeMode.END)
cell.set_property("editable", False)
cell.set_property("ypad", 8)
cell.set_property("xpad", 8)
col = Gtk.TreeViewColumn(_("Action"), cell)
col.add_attribute(cell, "markup", self._ACTION_LABEL_COLUMN)
col.set_expand(True)
col.set_resizable(True)
col.set_min_width(200)
col.set_sort_column_id(self._ACTION_LABEL_SORT_COLUMN)
view.append_column(col)
cell = Gtk.CellRendererText()
cell.set_property("ellipsize", Pango.EllipsizeMode.END)
cell.set_property("editable", True)
cell.set_property("ypad", 8)
cell.set_property("xpad", 8)
cell.connect("edited", self._accel_edited_cb)
cell.connect("editing-started", self._accel_editing_started_cb)
# TRANSLATORS: Refers to a keyboard key combination, such as "Ctrl+G".
# TRANSLATORS: Second column label in the keybinding preferences tab.
col = Gtk.TreeViewColumn(_("Key combination"), cell)
col.add_attribute(cell, "markup", self._ACCEL_LABEL_COLUMN)
col.set_expand(False)
col.set_resizable(True)
col.set_min_width(75)
col.set_sort_column_id(self._ACCEL_LABEL_SORT_COLUMN)
view.append_column(col)
store.set_sort_column_id(
self._ACTION_LABEL_SORT_COLUMN,
Gtk.SortType.ASCENDING,
)
def _show_cb(self, widget):
self._init_from_accel_map()
def _init_from_accel_map(self):
"""Initializes from the app UIManager and the global AccelMap"""
if self.ui_manager is None:
import gui.application
app = gui.application.get_app()
self.ui_manager = app.ui_manager
assert self.ui_manager is not None
self._action_labels.clear()
self._store.clear()
accel_labels = {}
for path, key, mods, changed in self._get_accel_map_entries():
accel_labels[path] = Gtk.accelerator_get_label(key, mods)
for group in self.ui_manager.get_action_groups():
group_name = group.get_name()
for action in group.list_actions():
action_name = _udecode(action.get_name())
path = u"<Actions>/%s/%s" % (group_name, action_name)
if isinstance(action, Gtk.RecentAction):
logger.debug("Skipping %r: GtkRecentAction", path)
continue
if action.__class__.__name__.endswith("FactoryAction"):
logger.debug("Skipping %r: MyPaintFactoryAction", path)
continue
action_label = _udecode(action.get_label())
if not action_label:
# TODO: Find better place for the label/tooltip copying,
# or a better way to do this in general.
action_suffix = "Centered"
if action_name.endswith(action_suffix):
src_name = action_name[:-len(action_suffix)]
logger.debug(
"Excluding toolbar-specific action: %s, but copy "
"tooltip/label from %s."
% (action_name, src_name)
)
src_action = group.get_action(src_name)
action.set_tooltip(src_action.get_tooltip())
action.set_label(src_action.get_label())
continue
action_desc = _udecode(action.get_tooltip())
if action_name.endswith("Mode"):
if isinstance(action, Gtk.RadioAction):
logger.debug(
"Not listing %r (radio action for a mode)"
"Assume there is a 'Flip'+%r action that's "
"better for keybindings.",
path,
action_name,
)
continue
if not action_desc:
if action_name.startswith("toolbar1"):
logger.debug(
"Not listing %r (toolbar placeholder action)",
path,
)
elif action_name.endswith("Menu"):
logger.debug(
"Not listing %r (menu-structure-only action)",
path,
)
else:
logger.warning(
"Not listing %r (no tooltip, fix before release!)",
path,
)
continue
action_desc = _udecode(action_desc)
self._action_labels[path] = action_label
accel_label = accel_labels.get(path, "")
assert accel_label is not None
self._accel_labels[path] = accel_label
row = [None for t in self._COLUMN_TYPES]
self._populate_row(row, path, action_label,
action_desc, accel_label)
self._store.append(row)
def _populate_row(self, row, path, action_label, action_desc, accel_label):
"""Write correctly formatted row data into a list-like obj."""
assert len(row) == len(self._COLUMN_TYPES)
nonmarkup_substs = {
"action_label": action_label,
"action_desc": action_desc,
"accel_label": accel_label,
}
markup_substs = {
k: lib.xml.escape(v)
for (k, v) in nonmarkup_substs.items()
}
action_markup = self._ACTION_LABEL_COLUMN_TEMPLATE \
.format(**markup_substs)
action_sort = self._ACTION_LABEL_SORT_COLUMN_TEMPLATE \
.format(**nonmarkup_substs)
accel_markup, accel_sort = \
self._fmt_accel_label(accel_label)
search_text = self._SEARCH_TEXT_COLUMN_TEMPLATE \
.format(**nonmarkup_substs)
row[self._PATH_COLUMN] = path
row[self._ACTION_LABEL_COLUMN] = action_markup
row[self._ACTION_LABEL_SORT_COLUMN] = action_sort
row[self._ACCEL_LABEL_COLUMN] = accel_markup
row[self._ACCEL_LABEL_SORT_COLUMN] = accel_sort
row[self._SEARCH_TEXT_COLUMN] = search_text
def _fmt_accel_label(self, label):
if label:
markup = self._ACCEL_LABEL_COLUMN_TEMPLATE.format(
accel_label = lib.xml.escape(label),
)
sort = self._ACCEL_LABEL_SORT_COLUMN_TEMPLATE.format(
accel_label = label,
)
else:
markup = ""
sort = ""
return (markup, sort)
def _update_from_accel_map(self):
"""Updates the list from the global AccelMap, logging changes"""
accel_labels = {}
for path, key, mods, changed in self._get_accel_map_entries():
accel_labels[path] = Gtk.accelerator_get_label(key, mods)
for row in self._store:
path = row[self._PATH_COLUMN]
new_label = accel_labels.get(path, "")
assert new_label is not None
old_label = row[self._ACCEL_LABEL_COLUMN]
if new_label != old_label:
logger.debug("update: %r now uses %r", path, new_label)
self._accel_labels[path] = new_label
new_markup, new_sort = self._fmt_accel_label(new_label)
row[self._ACCEL_LABEL_COLUMN] = new_markup
row[self._ACCEL_LABEL_SORT_COLUMN] = new_sort
@classmethod
def _get_accel_map_entries(cls):
"""Gets all entries in the global GtkAccelMap as a list"""
accel_map = Gtk.AccelMap.get()
entries = []
accel_map.foreach_unfiltered(0, lambda *e: entries.append(e))
entries = [(accel_path, key, mods, changed)
for data, accel_path, key, mods, changed in entries]
return entries
## Search
def _view_search_equal_cb(self, model, col, key, it):
store = self._store
key = _udecode("utf-8")
search_text = _udecode(store.get_value(it, col))
matches = (
key in search_text
or key.lower() in search_text.lower()
)
result = not matches # yeah, inverted sense
return result
## Editing
def _accel_edited_cb(self, cell, path, newname):
"""Arrange for list updates to happen after editing is done"""
self._update_from_accel_map()
def _accel_editing_started_cb(self, cell, editable, treepath):
"""Begin editing by showing a key capture dialog"""
store = self._store
it = store.get_iter(treepath)
accel_path = store.get_value(it, self._PATH_COLUMN)
accel_label = self._accel_labels[accel_path]
action_label = self._action_labels[accel_path]
editable.set_sensitive(False)
dialog = Gtk.Dialog()
# TRANSLATORS: Window title for the keybinding dialog. The %s is
# TRANSLATORS: replaced with the name of the action that the key
# TRANSLATORS: combination is being bound to, e.g. "Fit to View".
dialog.set_title(_("Edit Key for '%s'") % action_label)
dialog.set_transient_for(self.get_toplevel())
dialog.set_position(Gtk.WindowPosition.CENTER_ON_PARENT)
dialog.add_buttons(
Gtk.STOCK_DELETE, Gtk.ResponseType.REJECT,
Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
Gtk.STOCK_OK, Gtk.ResponseType.OK,
)
dialog.set_default_response(Gtk.ResponseType.OK)
dialog.connect(
"response",
self._edit_dialog_response_cb,
editable,
accel_path
)
evbox = Gtk.EventBox()
evbox.set_border_width(12)
dialog.connect(
"key-press-event",
self._edit_dialog_key_press_cb,
editable
)
grid = Gtk.Grid()
grid.set_row_spacing(12)
grid.set_column_spacing(12)
row = 0
label = Gtk.Label()
label.set_alignment(0, 0.5)
label.set_text(_("Action:"))
grid.attach(label, 0, row, 1, 1)
label = Gtk.Label()
label.set_alignment(0, 0.5)
label.set_text(str(action_label))
label.set_tooltip_text(str(accel_path))
label.set_hexpand(True)
grid.attach(label, 1, row, 1, 1)
if self._SHOW_ACCEL_PATH:
row += 1
label = Gtk.Label()
label.set_alignment(0, 0.5)
# TRANSLATORS: Path refers to an "action path" that is part of an
# TRANSLATORS: accelerator (keybinding). Found in the dialog for
# TRANSLATORS: adding new keybindings. This is a technical field
# TRANSLATORS: that probably shouldn't even be part of the gui,
# TRANSLATORS: so don't worry too much about the translation.
label.set_text(_("Path:"))
grid.attach(label, 0, row, 1, 1)
label = Gtk.Label()
label.set_alignment(0, 0.5)
label.set_text(str(accel_path))
label.set_hexpand(True)
grid.attach(label, 1, row, 1, 1)
row += 1
label = Gtk.Label()
label.set_alignment(0, 0.5)
# TRANSLATORS: Key refers to a key on the keyboard, this is a label
# TRANSLATORS: in the dialog for adding new keyboard bindings.
label.set_text(_("Key:"))
grid.attach(label, 0, row, 1, 1)
label = Gtk.Label()
label.set_alignment(0, 0.5)
label.set_text(str(accel_label))
dialog.accel_label_widget = label
label.set_hexpand(True)
grid.attach(label, 1, row, 1, 1)
row += 1
label = Gtk.Label()
label.set_hexpand(True)
label.set_vexpand(True)
label.set_margin_top(12)
label.set_margin_bottom(12)
label.set_alignment(0, 0)
label.set_line_wrap(True)
label.set_size_request(200, 75)
dialog.hint_widget = label
self._edit_dialog_set_standard_hint(dialog)
grid.attach(label, 0, row, 2, 1)
evbox.add(grid)
dialog.get_content_area().pack_start(evbox, True, True, 0)
evbox.show_all()
dialog.initial_accel_label = accel_label
dialog.accel_path = accel_path
dialog.result_keyval = None
dialog.result_mods = None
dialog.show()
def _edit_dialog_set_hint(self, dialog, markup):
"""Sets the hint message label in the capture dialog"""
dialog.hint_widget.set_markup(markup)
def _edit_dialog_set_standard_hint(self, dialog):
"""Set the boring how-to message in capture dialog"""
# TRANSLATORS: "keys" refers to keyboard keys, assignment refers
# TRANSLATORS: to an assignment of a keyboard key combination to
# TRANSLATORS: an action. This is an instructive message in the
# TRANSLATORS: keybinding dialog (Preferences | Keys).
markup = _("Press keys to update this assignment")
self._edit_dialog_set_hint(dialog, markup)
def _edit_dialog_key_press_cb(self, dialog, event, editable):
if event.type != Gdk.EventType.KEY_PRESS:
return False
if event.is_modifier:
return False
if self._USE_NORMAL_DIALOG_KEYS:
if event.keyval == Gdk.KEY_Return:
dialog.response(Gtk.ResponseType.OK)
return True
elif event.keyval == Gdk.KEY_Escape:
dialog.response(Gtk.ResponseType.CANCEL)
return True
elif event.keyval == Gdk.KEY_BackSpace:
dialog.response(Gtk.ResponseType.REJECT)
return True
# Stolen from GTK 2.24's gtk/gtkmenu.c (gtk_menu_key_press())
# Figure out what modifiers went into determining the key symbol
keymap = Gdk.Keymap.get_default()
bound, keyval, effective_group, level, consumed_modifiers = (
keymap.translate_keyboard_state(
event.hardware_keycode,
event.state,
event.group,
))
keyval = Gdk.keyval_to_lower(keyval)
mods = Gdk.ModifierType(
event.state
& Gtk.accelerator_get_default_mod_mask()
& ~consumed_modifiers)
# If lowercasing affects the keysym, then we need to include
# SHIFT in the modifiers. We re-upper case when we match against
# the keyval, but display and save in caseless form.
if keyval != event.keyval:
mods |= Gdk.ModifierType.SHIFT_MASK
accel_label = Gtk.accelerator_get_label(keyval, mods)
# So we get (<Shift>j, Shift+J) but just (plus, +). As I
# understand it.
# This is rejecting some legit key combinations such as the
# arrowkeys, so I had to remove it...
# if not Gtk.accelerator_valid(keyval, mods)
# return True
clash_accel_path = None
clash_action_label = None
for path, kv, m, changed in self._get_accel_map_entries():
if (kv, m) == (keyval, mods):
clash_accel_path = path
clash_action_label = _udecode(self._action_labels.get(
clash_accel_path,
# TRANSLATORS: Part of the keybinding dialog, refers
# TRANSLATORS: to an action bound to a key combination.
_(u"Unknown Action"),
))
break
if clash_accel_path == dialog.accel_path: # no change
self._edit_dialog_set_standard_hint(dialog)
label = str(accel_label)
dialog.accel_label_widget.set_text(label)
elif clash_accel_path:
markup_tmpl = _(
# TRANSLATORS: Warning message when attempting to assign a
# TRANSLATORS: keyboard combination that is already used.
u"<b>{accel} is already in use for '{action}'. "
u"The existing assignment will be replaced.</b>"
)
markup = markup_tmpl.format(
accel=lib.xml.escape(accel_label),
action=lib.xml.escape(clash_action_label),
)
self._edit_dialog_set_hint(dialog, markup)
label = u"%s (replace)" % (accel_label,)
dialog.accel_label_widget.set_text(str(label))
else:
self._edit_dialog_set_standard_hint(dialog)
label = u"%s (changed)" % (accel_label,)
dialog.accel_label_widget.set_text(label)
dialog.result_mods = mods
dialog.result_keyval = keyval
return True
def _edit_dialog_response_cb(self, dialog, response_id, editable, path):
mods = dialog.result_mods
keyval = dialog.result_keyval
if response_id == Gtk.ResponseType.REJECT:
entry_exists, junk = Gtk.AccelMap.lookup_entry(path)
if entry_exists:
logger.info("Delete entry %r", path)
if not Gtk.AccelMap.change_entry(path, 0, 0, True):
logger.warning("Failed to delete entry for %r", path)
editable.editing_done()
elif response_id == Gtk.ResponseType.OK:
if keyval is not None:
self._set_accelmap_entry(path, keyval, mods)
editable.editing_done()
editable.remove_widget()
dialog.destroy()
@classmethod
def _delete_clashing_accelmap_entries(cls, keyval, mods, path_to_keep):
accel_name = Gtk.accelerator_name(keyval, mods)
for path, k, m, changed in cls._get_accel_map_entries():
if path == path_to_keep:
continue
if (k, m) != (keyval, mods):
continue
if not Gtk.AccelMap.change_entry(path, 0, 0, True):
logger.warning("Failed to delete clashing use of %r (%r)",
accel_name, path)
else:
logger.debug("Deleted clashing use of %r (was %r)",
accel_name, path)
@classmethod
def _set_accelmap_entry(cls, path, keyval, mods):
cls._delete_clashing_accelmap_entries(keyval, mods, path)
accel_name = Gtk.accelerator_name(keyval, mods)
logger.info("Changing entry %r: %r", accel_name, path)
if Gtk.AccelMap.change_entry(path, keyval, mods, True):
logger.debug("Updated %r successfully", path)
else:
logger.error("Failed to update %r", path)
entry_exists, junk = Gtk.AccelMap.lookup_entry(path)
assert entry_exists
def _udecode(s, enc="utf-8"):
"""The APIs sometimes return Unicode strings as bytes objects.
This is more often a Python2 thing, and is sometimes OK back then,
but for porting to Py3 we need to be more explicit about everything.
"""
if s is None:
return None
if not isinstance(s, unicode):
s = s.decode(enc)
return s
## Testing
def _test():
win = Gtk.Window()
win.set_title("accelmap.py")
win.connect("destroy", Gtk.main_quit)
builder = Gtk.Builder()
import gui.factoryaction # noqa F401: for side effects only
builder.add_from_file("gui/resources.xml")
uimgr = builder.get_object("app_ui_manager")
editor = AccelMapEditor()
editor.ui_manager = uimgr
win.add(editor)
win.set_default_size(400, 300)
win.show_all()
Gtk.main()
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG)
import signal
signal.signal(signal.SIGINT, signal.SIG_DFL)
import sys
orig_excepthook = sys.excepthook
def _excepthook(*args):
orig_excepthook(*args)
while Gtk.main_level():
Gtk.main_quit()
sys.exit()
sys.excepthook = _excepthook
_test()