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# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2008 - 2016 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.
"""
Various routines to display meaningful tooltips (text or graphical).
The show() function displays a tooltip showing part of a Document.
"""
from PyQt5.QtCore import QSize
from PyQt5.QtGui import (
QFont, QPainter, QPixmap, QTextCursor, QTextDocument)
from PyQt5.QtWidgets import QLabel
import metainfo
import tokeniter
import highlighter
import textformats
import gadgets.customtooltip
import tokeniter
import ly.lex.lilypond
def pixmap(cursor, num_lines=6, scale=0.8):
"""Return a QPixmap displaying the selected lines of the document.
If the cursor has no selection, num_lines are drawn.
By default the text is drawn 0.8 * the normal font size. You can change
that by supplying the scale parameter.
"""
block = cursor.document().findBlock(cursor.selectionStart())
c2 = QTextCursor(block)
if cursor.hasSelection():
c2.setPosition(cursor.selectionEnd(), QTextCursor.KeepAnchor)
c2.movePosition(QTextCursor.EndOfBlock, QTextCursor.KeepAnchor)
else:
c2.movePosition(QTextCursor.NextBlock, QTextCursor.KeepAnchor, num_lines)
data = textformats.formatData('editor')
doc = QTextDocument()
font = QFont(data.font)
font.setPointSizeF(font.pointSizeF() * scale)
doc.setDefaultFont(font)
doc.setPlainText(c2.selection().toPlainText())
if metainfo.info(cursor.document()).highlighting:
highlighter.highlight(doc, state=tokeniter.state(block))
size = doc.size().toSize() + QSize(8, -4)
pix = QPixmap(size)
pix.fill(data.baseColors['background'])
doc.drawContents(QPainter(pix))
return pix
def show(cursor, pos=None, num_lines=6):
"""Displays a tooltip showing part of the cursor's Document.
If the cursor has a selection, those blocks are displayed.
Otherwise, num_lines lines are displayed.
If pos is not given, the global mouse position is used.
"""
pix = pixmap(cursor, num_lines)
label = QLabel()
label.setPixmap(pix)
label.setStyleSheet("QLabel { border: 1px solid #777; }")
label.resize(pix.size())
widgets.customtooltip.show(label, pos)
def text(cursor):
"""Return basic tooltip text displaying filename, line and column information.
If the position is inside a music expression, the name of the variable the
expression is assigned to is also appended on a new line. If the time
position can be determined it is appended on a third line.
"""
filename = cursor.document().documentName()
line = cursor.blockNumber() + 1
column = cursor.position() - cursor.block().position()
text = "{0} ({1}:{2})".format(filename, line, column)
definition = get_definition(cursor)
if definition:
text += '\n' + definition
time_pos = time_position(cursor)
if time_pos:
text += '\n' + _("Position: {pos}").format(pos=time_pos)
return text
def get_definition(cursor):
"""Return the variable name the cursor's music expression is assigned to.
If the music is in a \\score instead, "\\score" is returned.
Returns None if no variable name can be found.
"""
block = cursor.block()
while block.isValid():
state = tokeniter.state(block)
if isinstance(state.parser(), ly.lex.lilypond.ParseGlobal):
for t in tokeniter.tokens(block)[:2]:
if type(t) is ly.lex.lilypond.Name:
return t[:]
elif isinstance(t, ly.lex.lilypond.Keyword) and t == '\\score':
return '\\score'
block = block.previous()
def time_position(cursor):
"""Returns the time position of the music the cursor points at.
Format the value as "5/1" etc.
"""
import documentinfo
pos = documentinfo.music(cursor.document()).time_position(cursor.position())
if pos is not None:
import ly.duration
return ly.duration.format_fraction(pos)
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