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# -*- coding: utf-8 -*-
# vispy: testskip
# -----------------------------------------------------------------------------
# Copyright (c) Vispy Development Team. All Rights Reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
# -----------------------------------------------------------------------------
"""
# QScintilla editor
#
# Adapted from Eli Bendersky (eliben@gmail.com)
# This code is in the public domain
#
# API: http://pyqt.sourceforge.net/Docs/QScintilla2/classQsciScintilla.html
#
"""
import sys
import re
from PyQt5.QtCore import * # noqa
from PyQt5.QtWidgets import * # noqa
try:
from PyQt5 import Qsci
from PyQt5.Qsci import QsciScintilla
HAVE_QSCI = True
except ImportError:
HAVE_QSCI = False
if not HAVE_QSCI:
# backup editor in case QScintilla is not available
class Editor(QPlainTextEdit):
def __init__(self, parent=None, language=None):
QPlainTextEdit.__init__(self, parent)
def setText(self, text):
self.setPlainText(text)
def text(self):
return str(self.toPlainText()).encode('UTF-8')
def __getattr__(self, name):
return lambda: None
else:
class Editor(QsciScintilla):
ARROW_MARKER_NUM = 8
def __init__(self, parent=None, language='Python'):
super(Editor, self).__init__(parent)
self.setIndentationsUseTabs(False)
self.setIndentationWidth(4)
# Set the default font
font = QFont()
font.setFamily('DejaVu Sans Mono')
font.setFixedPitch(True)
font.setPointSize(10)
self.setFont(font)
self.setMarginsFont(font)
self.zoomIn()
# Margin 0 is used for line numbers
fontmetrics = QFontMetrics(font)
self.setMarginsFont(font)
self.setMarginWidth(0, fontmetrics.width("000") + 6)
self.setMarginLineNumbers(0, True)
self.setMarginsBackgroundColor(QColor("#cccccc"))
self._marker = None
# Clickable margin 1 for showing markers
# self.setMarginSensitivity(1, True)
# self.connect(self,
# SIGNAL('marginClicked(int, int, Qt::KeyboardModifiers)'),
# self.on_margin_clicked)
self.markerDefine(QsciScintilla.RightArrow, self.ARROW_MARKER_NUM)
self.setMarkerBackgroundColor(QColor("#ee1111"),
self.ARROW_MARKER_NUM)
# Brace matching: enable for a brace immediately before or after
# the current position
#
self.setBraceMatching(QsciScintilla.SloppyBraceMatch)
# Current line visible with special background color
self.setCaretLineVisible(True)
self.setCaretLineBackgroundColor(QColor("#ffe4e4"))
# Set Python lexer
# Set style for Python comments (style number 1) to a fixed-width
# courier.
#
lexer = getattr(Qsci, 'QsciLexer' + language)()
lexer.setDefaultFont(font)
self.setLexer(lexer)
self.SendScintilla(QsciScintilla.SCI_STYLESETFONT, 1, 'Courier')
# Don't want to see the horizontal scrollbar at all
# Use raw message to Scintilla here (all messages are documented
# here: http://www.scintilla.org/ScintillaDoc.html)
self.SendScintilla(QsciScintilla.SCI_SETHSCROLLBAR, 0)
self.setWrapMode(QsciScintilla.WrapWord)
self.setEolMode(QsciScintilla.EolUnix)
# not too small
# self.setMinimumSize(600, 450)
def set_marker(self, line):
self.clear_marker()
self.markerAdd(line, self.ARROW_MARKER_NUM)
self._marker = line
def clear_marker(self):
if self._marker is not None:
self.markerDelete(self._marker, self.ARROW_MARKER_NUM)
# def on_margin_clicked(self, nmargin, nline, modifiers):
# Toggle marker for the line the margin was clicked on
# if self.markersAtLine(nline) != 0:
# self.markerDelete(nline, self.ARROW_MARKER_NUM)
# else:
# self.markerAdd(nline, self.ARROW_MARKER_NUM)
def wheelEvent(self, ev):
# Use ctrl+wheel to zoom in/out
if Qt.ControlModifier & ev.modifiers():
if ev.delta() > 0:
self.zoomIn()
else:
self.zoomOut()
else:
return super(Editor, self).wheelEvent(ev)
def keyPressEvent(self, ev):
if int(Qt.ControlModifier & ev.modifiers()) > 0:
if ev.key() == Qt.Key_Slash:
self.comment(True)
return
elif ev.key() == Qt.Key_Question:
self.comment(False)
return
elif (ev.key() == Qt.Key_Z and
Qt.ShiftModifier & ev.modifiers()):
self.redo()
return
elif ev.key() == Qt.Key_Q:
sys.exit(0)
return super(Editor, self).keyPressEvent(ev)
def text(self):
return str(super(Editor, self).text()).encode('UTF-8')
def comment(self, comment=True):
sel = self.getSelection()[:]
text = self.text()
lines = text.split('\n')
if sel[0] == -1:
# toggle for just this line
row, col = self.getCursorPosition()
line = lines[row]
self.setSelection(row, 0, row, len(line))
if comment:
line = '#' + line
else:
line = line.replace("#", "", 1)
self.replaceSelectedText(line)
self.setCursorPosition(row, col+(1 if col > 0 else 0))
else:
block = lines[sel[0]:sel[2]]
# make sure all lines have #
new = []
if comment:
for line in block:
new.append('#' + line)
else:
for line in block:
if line.strip() == '':
new.append(line)
continue
if re.match(r'\s*\#', line) is None:
return
new.append(line.replace('#', '', 1))
self.setSelection(sel[0], 0, sel[2], 0)
self.replaceSelectedText('\n'.join(new) + '\n')
# shift = 1 if comment else -1
self.setSelection(sel[0], max(0, sel[1]), sel[2], sel[3])
if __name__ == "__main__":
app = QApplication(sys.argv)
editor = Editor()
editor.show()
editor.setText(open(sys.argv[0]).read())
editor.resize(800, 800)
app.exec_()
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