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# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2014 - 2014 by Wilbert Berendsen
#
# 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.
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
Find the definition of variables.
"""
from PyQt5.QtCore import QUrl
from PyQt5.QtGui import QTextCursor
import app
import documentinfo
import ly.music.items
import browseriface
def refnode(cursor):
"""Return the music item at the cursor if that probably is a reference to a definition elsewhere."""
node = documentinfo.music(cursor.document()).node(cursor.position())
if (node and node.end_position() >= cursor.selectionEnd()
and isinstance(node, (
ly.music.items.UserCommand,
ly.music.items.MarkupUserCommand,
))):
return node
def target(node):
"""Return the target node (where the node is defined)."""
value = node.value()
if value:
target = value.parent()
if isinstance(target, ly.music.items.Document):
target = value # happens with #(define-markup-command ...)
return target
def goto_definition(mainwindow, cursor=None):
"""Go to the definition of the item the mainwindow's cursor is at.
Return True if there was a definition.
"""
if cursor is None:
cursor = mainwindow.textCursor()
node = refnode(cursor)
if node:
t = target(node)
if t:
goto_target(mainwindow, t)
return True
def goto_target(mainwindow, target):
"""Switch to the document and location where the node target is."""
lydoc = target.document
try:
# this succeeds if this is a document that is currently open
doc = lydoc.document
except AttributeError:
# it is an included file, just load it
filename = target.document.filename
doc = app.openUrl(QUrl.fromLocalFile(filename))
cursor = QTextCursor(doc)
cursor.setPosition(target.position)
browseriface.get(mainwindow).setTextCursor(cursor)
mainwindow.currentView().centerCursor()
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