392 lines
12 KiB
Python
392 lines
12 KiB
Python
import keyword
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import os
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import re
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import sys
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import subprocess
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from argparse import Namespace
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import pyqtgraph as pg
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from pyqtgraph.Qt import QtGui, QtCore, QT_LIB
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from collections import OrderedDict
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from .utils import examples
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path = os.path.abspath(os.path.dirname(__file__))
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sys.path.insert(0, path)
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app = pg.mkQApp()
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import importlib
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ui_template = importlib.import_module(
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f'exampleLoaderTemplate_{QT_LIB.lower()}')
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# based on https://github.com/art1415926535/PyQt5-syntax-highlighting
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QRegularExpression = QtCore.QRegularExpression
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QFont = QtGui.QFont
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QColor = QtGui.QColor
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QTextCharFormat = QtGui.QTextCharFormat
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QSyntaxHighlighter = QtGui.QSyntaxHighlighter
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def format(color, style=''):
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"""
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Return a QTextCharFormat with the given attributes.
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"""
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_color = QColor()
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if type(color) is not str:
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_color.setRgb(color[0], color[1], color[2])
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else:
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_color.setNamedColor(color)
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_format = QTextCharFormat()
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_format.setForeground(_color)
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if 'bold' in style:
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_format.setFontWeight(QFont.Bold)
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if 'italic' in style:
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_format.setFontItalic(True)
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return _format
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class LightThemeColors:
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Red = "#B71C1C"
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Pink = "#FCE4EC"
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Purple = "#4A148C"
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DeepPurple = "#311B92"
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Indigo = "#1A237E"
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Blue = "#0D47A1"
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LightBlue = "#01579B"
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Cyan = "#006064"
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Teal = "#004D40"
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Green = "#1B5E20"
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LightGreen = "#33691E"
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Lime = "#827717"
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Yellow = "#F57F17"
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Amber = "#FF6F00"
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Orange = "#E65100"
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DeepOrange = "#BF360C"
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Brown = "#3E2723"
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Grey = "#212121"
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BlueGrey = "#263238"
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class DarkThemeColors:
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Red = "#F44336"
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Pink = "#F48FB1"
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Purple = "#CE93D8"
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DeepPurple = "#B39DDB"
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Indigo = "#9FA8DA"
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Blue = "#90CAF9"
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LightBlue = "#81D4FA"
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Cyan = "#80DEEA"
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Teal = "#80CBC4"
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Green = "#A5D6A7"
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LightGreen = "#C5E1A5"
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Lime = "#E6EE9C"
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Yellow = "#FFF59D"
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Amber = "#FFE082"
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Orange = "#FFCC80"
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DeepOrange = "#FFAB91"
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Brown = "#BCAAA4"
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Grey = "#EEEEEE"
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BlueGrey = "#B0BEC5"
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LIGHT_STYLES = {
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'keyword': format(LightThemeColors.Blue, 'bold'),
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'operator': format(LightThemeColors.Red, 'bold'),
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'brace': format(LightThemeColors.Purple),
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'defclass': format(LightThemeColors.Indigo, 'bold'),
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'string': format(LightThemeColors.Amber),
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'string2': format(LightThemeColors.DeepPurple),
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'comment': format(LightThemeColors.Green, 'italic'),
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'self': format(LightThemeColors.Blue, 'bold'),
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'numbers': format(LightThemeColors.Teal),
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}
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DARK_STYLES = {
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'keyword': format(DarkThemeColors.Blue, 'bold'),
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'operator': format(DarkThemeColors.Red, 'bold'),
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'brace': format(DarkThemeColors.Purple),
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'defclass': format(DarkThemeColors.Indigo, 'bold'),
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'string': format(DarkThemeColors.Amber),
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'string2': format(DarkThemeColors.DeepPurple),
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'comment': format(DarkThemeColors.Green, 'italic'),
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'self': format(DarkThemeColors.Blue, 'bold'),
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'numbers': format(DarkThemeColors.Teal),
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}
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class PythonHighlighter(QSyntaxHighlighter):
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"""Syntax highlighter for the Python language.
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"""
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# Python keywords
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keywords = keyword.kwlist
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# Python operators
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operators = [
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r'=',
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# Comparison
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r'==', r'!=', r'<', r'<=', r'>', r'>=',
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# Arithmetic
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r'\+', r"-", r'\*', r'/', r'//', r'%', r'\*\*',
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# In-place
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r'\+=', r'-=', r'\*=', r'/=', r'\%=',
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# Bitwise
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r'\^', r'\|', r'&', r'~', r'>>', r'<<',
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]
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# Python braces
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braces = [
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r'\{', r'\}', r'\(', r'\)', r'\[', r'\]',
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]
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def __init__(self, document):
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QSyntaxHighlighter.__init__(self, document)
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# Multi-line strings (expression, flag, style)
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self.tri_single = (QRegularExpression("'''"), 1, 'string2')
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self.tri_double = (QRegularExpression('"""'), 2, 'string2')
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rules = []
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# Keyword, operator, and brace rules
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rules += [(r'\b%s\b' % w, 0, 'keyword')
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for w in PythonHighlighter.keywords]
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rules += [(o, 0, 'operator')
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for o in PythonHighlighter.operators]
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rules += [(b, 0, 'brace')
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for b in PythonHighlighter.braces]
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# All other rules
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rules += [
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# 'self'
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(r'\bself\b', 0, 'self'),
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# 'def' followed by an identifier
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(r'\bdef\b\s*(\w+)', 1, 'defclass'),
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# 'class' followed by an identifier
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(r'\bclass\b\s*(\w+)', 1, 'defclass'),
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# Numeric literals
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(r'\b[+-]?[0-9]+[lL]?\b', 0, 'numbers'),
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(r'\b[+-]?0[xX][0-9A-Fa-f]+[lL]?\b', 0, 'numbers'),
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(r'\b[+-]?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?\b', 0, 'numbers'),
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# Double-quoted string, possibly containing escape sequences
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(r'"[^"\\]*(\\.[^"\\]*)*"', 0, 'string'),
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# Single-quoted string, possibly containing escape sequences
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(r"'[^'\\]*(\\.[^'\\]*)*'", 0, 'string'),
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# From '#' until a newline
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(r'#[^\n]*', 0, 'comment'),
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]
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self.rules = rules
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@property
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def styles(self):
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app = QtGui.QApplication.instance()
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return DARK_STYLES if app.property('darkMode') else LIGHT_STYLES
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def highlightBlock(self, text):
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"""Apply syntax highlighting to the given block of text.
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"""
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# Do other syntax formatting
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for expression, nth, format in self.rules:
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format = self.styles[format]
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for n, match in enumerate(re.finditer(expression, text)):
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if n < nth:
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continue
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start = match.start()
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length = match.end() - start
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self.setFormat(start, length, format)
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self.setCurrentBlockState(0)
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# Do multi-line strings
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in_multiline = self.match_multiline(text, *self.tri_single)
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if not in_multiline:
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in_multiline = self.match_multiline(text, *self.tri_double)
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def match_multiline(self, text, delimiter, in_state, style):
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"""Do highlighting of multi-line strings.
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=========== ==========================================================
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delimiter (QRegularExpression) for triple-single-quotes or
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triple-double-quotes
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in_state (int) to represent the corresponding state changes when
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inside those strings. Returns True if we're still inside a
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multi-line string when this function is finished.
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style (str) representation of the kind of style to use
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=========== ==========================================================
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"""
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# If inside triple-single quotes, start at 0
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if self.previousBlockState() == in_state:
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start = 0
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add = 0
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# Otherwise, look for the delimiter on this line
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else:
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match = delimiter.match(text)
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start = match.capturedStart()
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# Move past this match
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add = match.capturedLength()
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# As long as there's a delimiter match on this line...
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while start >= 0:
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# Look for the ending delimiter
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match = delimiter.match(text, start + add)
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end = match.capturedEnd()
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# Ending delimiter on this line?
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if end >= add:
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length = end - start + add + match.capturedLength()
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self.setCurrentBlockState(0)
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# No; multi-line string
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else:
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self.setCurrentBlockState(in_state)
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length = len(text) - start + add
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# Apply formatting
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self.setFormat(start, length, self.styles[style])
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# Look for the next match
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match = delimiter.match(text, start + length)
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start = match.capturedStart()
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# Return True if still inside a multi-line string, False otherwise
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if self.currentBlockState() == in_state:
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return True
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else:
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return False
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class ExampleLoader(QtGui.QMainWindow):
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def __init__(self):
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QtGui.QMainWindow.__init__(self)
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self.ui = ui_template.Ui_Form()
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self.cw = QtGui.QWidget()
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self.setCentralWidget(self.cw)
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self.ui.setupUi(self.cw)
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self.setWindowTitle("PyQtGraph Examples")
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self.codeBtn = QtGui.QPushButton('Run Edited Code')
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self.codeLayout = QtGui.QGridLayout()
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self.ui.codeView.setLayout(self.codeLayout)
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self.hl = PythonHighlighter(self.ui.codeView.document())
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app = QtGui.QApplication.instance()
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app.paletteChanged.connect(self.updateTheme)
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self.codeLayout.addItem(QtGui.QSpacerItem(100,100,QtGui.QSizePolicy.Expanding,QtGui.QSizePolicy.Expanding), 0, 0)
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self.codeLayout.addWidget(self.codeBtn, 1, 1)
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self.codeBtn.hide()
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global examples
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self.itemCache = []
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self.populateTree(self.ui.exampleTree.invisibleRootItem(), examples)
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self.ui.exampleTree.expandAll()
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self.resize(1000,500)
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self.show()
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self.ui.splitter.setSizes([250,750])
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self.ui.loadBtn.clicked.connect(self.loadFile)
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self.ui.exampleTree.currentItemChanged.connect(self.showFile)
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self.ui.exampleTree.itemDoubleClicked.connect(self.loadFile)
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self.ui.codeView.textChanged.connect(self.codeEdited)
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self.codeBtn.clicked.connect(self.runEditedCode)
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def simulate_black_mode(self):
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"""
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used to simulate MacOS "black mode" on other platforms
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intended for debug only, as it manage only the QPlainTextEdit
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"""
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# first, a dark background
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c = QtGui.QColor('#171717')
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p = self.ui.codeView.palette()
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p.setColor(QtGui.QPalette.Active, QtGui.QPalette.Base, c)
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p.setColor(QtGui.QPalette.Inactive, QtGui.QPalette.Base, c)
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self.ui.codeView.setPalette(p)
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# then, a light font
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f = QtGui.QTextCharFormat()
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f.setForeground(QtGui.QColor('white'))
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self.ui.codeView.setCurrentCharFormat(f)
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# finally, override application automatic detection
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app = QtGui.QApplication.instance()
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app.setProperty('darkMode', True)
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def updateTheme(self):
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self.hl = PythonHighlighter(self.ui.codeView.document())
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def populateTree(self, root, examples):
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bold_font = None
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for key, val in examples.items():
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item = QtGui.QTreeWidgetItem([key])
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self.itemCache.append(item) # PyQt 4.9.6 no longer keeps references to these wrappers,
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# so we need to make an explicit reference or else the .file
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# attribute will disappear.
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if isinstance(val, OrderedDict):
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self.populateTree(item, val)
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elif isinstance(val, Namespace):
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item.file = val.filename
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if 'recommended' in val:
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if bold_font is None:
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bold_font = item.font(0)
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bold_font.setBold(True)
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item.setFont(0, bold_font)
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else:
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item.file = val
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root.addChild(item)
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def currentFile(self):
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item = self.ui.exampleTree.currentItem()
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if hasattr(item, 'file'):
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global path
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return os.path.join(path, item.file)
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return None
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def loadFile(self, edited=False):
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qtLib = str(self.ui.qtLibCombo.currentText())
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env = None
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if qtLib != 'default':
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env = dict(os.environ, PYQTGRAPH_QT_LIB=qtLib)
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if edited:
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path = os.path.abspath(os.path.dirname(__file__))
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proc = subprocess.Popen([sys.executable, '-'], stdin=subprocess.PIPE, cwd=path, env=env)
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code = str(self.ui.codeView.toPlainText()).encode('UTF-8')
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proc.stdin.write(code)
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proc.stdin.close()
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else:
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fn = self.currentFile()
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if fn is None:
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return
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subprocess.Popen([sys.executable, fn], env=env)
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def showFile(self):
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fn = self.currentFile()
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if fn is None:
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self.ui.codeView.clear()
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return
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if os.path.isdir(fn):
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fn = os.path.join(fn, '__main__.py')
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with open(fn, "r") as currentFile:
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text = currentFile.read()
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self.ui.codeView.setPlainText(text)
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self.ui.loadedFileLabel.setText(fn)
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self.codeBtn.hide()
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def codeEdited(self):
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self.codeBtn.show()
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def runEditedCode(self):
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self.loadFile(edited=True)
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def main():
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app = pg.mkQApp()
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loader = ExampleLoader()
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app.exec_()
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if __name__ == '__main__':
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main()
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