Current File : //usr/lib/python3/dist-packages/orca/bookmarks.py
# Orca
#
# Copyright 2005-2008 Sun Microsystems Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., Franklin Street, Fifth Floor,
# Boston MA 02110-1301 USA.
"""Provides the default implementation for bookmarks in Orca."""
import pickle
import os
import urllib.parse
from . import cmdnames
from . import debug
from . import keybindings
from . import input_event
from . import messages
from . import settings_manager
from .ax_document import AXDocument
from .ax_object import AXObject
class Bookmarks:
"""Represents a default bookmark handler."""
def __init__(self, script):
self._script = script
self._bookmarks = {}
self._saveObservers = []
self._loadObservers = []
self._loadBookmarks()
self._currentbookmarkindex = None
self._handlers = self.get_handlers(True)
self._bindings = keybindings.KeyBindings()
def get_bindings(self, refresh=False, is_desktop=True):
"""Returns the bookmark keybindings."""
if refresh:
msg = "BOOKMARKS: Refreshing bindings."
debug.printMessage(debug.LEVEL_INFO, msg, True)
self._setup_bindings()
elif self._bindings.isEmpty():
self._setup_bindings()
return self._bindings
def get_handlers(self, refresh=False):
"""Returns the bookmark handlers."""
if refresh:
msg = "BOOKMARKS: Refreshing handlers."
debug.printMessage(debug.LEVEL_INFO, msg, True)
self._setup_handlers()
return self._handlers
def _setup_handlers(self):
"""Sets up the bookmark input event handlers."""
self._handlers = {}
self._handlers["goToPrevBookmark"] = \
input_event.InputEventHandler(
self.goToPrevBookmark,
cmdnames.BOOKMARK_GO_TO_PREVIOUS)
self._handlers["goToNextBookmark"] = \
input_event.InputEventHandler(
self.goToNextBookmark,
cmdnames.BOOKMARK_GO_TO_NEXT)
self._handlers["goToBookmark"] = \
input_event.InputEventHandler(
self.goToBookmark,
cmdnames.BOOKMARK_GO_TO)
self._handlers["addBookmark"] = \
input_event.InputEventHandler(
self.addBookmark,
cmdnames.BOOKMARK_ADD)
self._handlers["saveBookmarks"] = \
input_event.InputEventHandler(
self.saveBookmarks,
cmdnames.BOOKMARK_SAVE)
msg = "BOOKMARKS: Handlers set up."
debug.printMessage(debug.LEVEL_INFO, msg, True)
def _setup_bindings(self):
"""Sets up the bookmark key bindings."""
self._bindings = keybindings.KeyBindings()
self._bindings.add(
keybindings.KeyBinding(
"b",
keybindings.defaultModifierMask,
keybindings.ORCA_MODIFIER_MASK,
self._handlers.get("goToNextBookmark")))
self._bindings.add(
keybindings.KeyBinding(
"b",
keybindings.defaultModifierMask,
keybindings.ORCA_SHIFT_MODIFIER_MASK,
self._handlers.get("goToPrevBookmark")))
self._bindings.add(
keybindings.KeyBinding(
"b",
keybindings.defaultModifierMask,
keybindings.ORCA_ALT_MODIFIER_MASK,
self._handlers.get("saveBookmarks")))
for i in range(6):
self._bindings.add(
keybindings.KeyBinding(
str(i + 1),
keybindings.defaultModifierMask,
keybindings.ORCA_MODIFIER_MASK,
self._handlers.get("goToBookmark")))
self._bindings.add(
keybindings.KeyBinding(
str(i + 1),
keybindings.defaultModifierMask,
keybindings.ORCA_ALT_MODIFIER_MASK,
self._handlers.get("addBookmark")))
msg = "BOOKMARKS: Bindings set up."
debug.printMessage(debug.LEVEL_INFO, msg, True)
def addSaveObserver(self, observer):
self._saveObservers.append(observer)
def addLoadObserver(self, observer):
self._loadObservers.append(observer)
def goToBookmark(self, script, inputEvent, index=None):
""" Go to the bookmark indexed by inputEvent.hw_code """
# establish the _bookmarks index
index = index or inputEvent.hw_code
try:
context = self._script.getFlatReviewContext()
context_info = self._bookmarks[index]
context.setCurrent(context_info['line'], context_info['zone'], \
context_info['word'], context_info['char'])
self._bookmarks[index] = context_info
except KeyError:
self._script.presentMessage(messages.BOOKMARK_NOT_FOUND)
return
self._script.flatReviewPresenter.present_item(script, inputEvent)
# update the currentbookmark
self._currentbookmarkindex = index
def addBookmark(self, script, inputEvent):
""" Add an in-page accessible object bookmark for this key. """
context = self._script.getFlatReviewContext()
self._bookmarks[inputEvent.hw_code] = self._contextToBookmark(context)
self._script.presentMessage(messages.BOOKMARK_ENTERED)
def saveBookmarks(self, script, inputEvent):
""" Save the bookmarks for this script. """
try:
self.saveBookmarksToDisk(self._bookmarks)
self._script.presentMessage(messages.BOOKMARKS_SAVED)
except IOError:
self._script.presentMessage(messages.BOOKMARKS_SAVED_FAILURE)
# Notify the observers
for o in self._saveObservers:
o()
def goToNextBookmark(self, script, inputEvent):
""" Go to the next bookmark location. If no bookmark has yet to be
selected, the first bookmark will be used. """
# get the hardware keys that have registered bookmarks
hwkeys = sorted(self._bookmarks.keys())
# no bookmarks have been entered
if len(hwkeys) == 0:
self._script.presentMessage(messages.BOOKMARKS_NOT_FOUND)
return
# only 1 bookmark or we are just starting out
elif len(hwkeys) == 1 or self._currentbookmarkindex is None:
self.goToBookmark(None, index=hwkeys[0])
return
# find current bookmark hw_code in our sorted list.
# Go to next one if possible
try:
index = hwkeys.index(self._currentbookmarkindex)
self.goToBookmark(None, index=hwkeys[index+1])
except (ValueError, KeyError, IndexError):
self.goToBookmark(None, index=hwkeys[0])
def goToPrevBookmark(self, script, inputEvent):
# get the hardware keys that have registered bookmarks
hwkeys = sorted(self._bookmarks.keys())
# no bookmarks have been entered
if len(hwkeys) == 0:
self._script.presentMessage(messages.BOOKMARKS_NOT_FOUND)
return
# only 1 bookmark or we are just starting out
elif len(hwkeys) == 1 or self._currentbookmarkindex is None:
self.goToBookmark(None, index=hwkeys[0])
return
# find current bookmark hw_code in our sorted list.
# Go to previous one if possible
try:
index = hwkeys.index(self._currentbookmarkindex)
self.goToBookmark(None, index=hwkeys[index-1])
except (ValueError, KeyError, IndexError):
self.goToBookmark(None, index=hwkeys[0])
def _loadBookmarks(self):
""" Load this scripts saved bookmarks."""
self._bookmarks = self.readBookmarksFromDisk() or {}
# notify the observers
for o in self._loadObservers:
o()
def readBookmarksFromDisk(self, filename=None):
""" Read saved bookmarks from disk. Currently an unpickled object
that represents a bookmark """
filename = filename or self._script.name.split(' ')[0]
orcaDir = settings_manager.getManager().getPrefsDir()
if not orcaDir:
return
orcaBookmarksDir = os.path.join(orcaDir, "bookmarks")
try:
inputFile = open( os.path.join( orcaBookmarksDir, \
f'{filename}.pkl'), "r")
bookmarks = pickle.load(inputFile.buffer)
inputFile.close()
return bookmarks
except (IOError, EOFError, OSError):
return None
def saveBookmarksToDisk(self, bookmarksObj, filename=None):
""" Write bookmarks to disk. bookmarksObj must be a pickleable
object. """
filename = filename or self._script.name.split(' ')[0]
orcaDir = settings_manager.getManager().getPrefsDir()
orcaBookmarksDir = os.path.join(orcaDir, "bookmarks")
# create directory if it does not exist. correct place??
try:
os.stat(orcaBookmarksDir)
except OSError:
os.mkdir(orcaBookmarksDir)
output = open( os.path.join( orcaBookmarksDir, \
f'{filename}.pkl'), "w", os.O_CREAT)
pickle.dump(bookmarksObj, output.buffer)
output.close()
def _contextToBookmark(self, context):
"""Converts a flat_review.Context object into a bookmark."""
context_info = {}
context_info['zone'] = context.zoneIndex
context_info['char'] = context.charIndex
context_info['word'] = context.wordIndex
context_info['line'] = context.lineIndex
return context_info
def _bookmarkToContext(self, bookmark):
"""Converts a bookmark into a flat_review.Context object."""
context = self._script.getFlatReviewContext()
context.setCurrent(bookmark['line'], bookmark['zone'], \
bookmark['word'], bookmark['char'])
return context
def getURIKey(self):
"""Returns the URI key for a given page as a URI stripped of
parameters?query#fragment as seen in urlparse."""
uri = AXDocument.get_uri(self._script.utilities.documentFrame())
if uri:
parsed_uri = urllib.parse.urlparse(uri)
return ''.join(parsed_uri[0:3])
else:
return None
def pathToObj(self, path):
"""Return the object with the given path (relative to the
document frame). """
returnobj = self._script.utilities.documentFrame()
for childnumber in path:
returnobj = AXObject.get_child(returnobj, childnumber)
if not returnobj:
break
return returnobj
def _objToPath(self, start_obj=None):
"""Given an object, return it's path from the root accessible. If obj
is not provided, the current caret context is used. """
if not start_obj:
[start_obj, characterOffset] = self._script.utilities.getCaretContext()
if not start_obj:
return []
if self._script.utilities.isDocument(start_obj):
return []
path = []
path.append(AXObject.get_index_in_parent(start_obj))
p = AXObject.get_parent(start_obj)
while p:
if self._script.utilities.isDocument(p):
path.reverse()
return path
path.append(AXObject.get_index_in_parent(p))
p = AXObject.get_parent(p)
return []
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