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基于python与pyqt实现的一个简单的文本编辑器。

主要功能为文件的操作：打开文件，新建文件，保存与退出，

编辑功能主要为：粘贴，剪切，复制，以及查找功能

关于字数统计，因为字符原因是不够准确的，正常情况下背景为白色，但是黑色更护眼，可以基于代码进行相应的一个调整。

import sys
import re
from PyQt5.QtWidgets import QApplication, QMainWindow, QAction, qApp, QStatusBar, QMenuBar, QTextEdit, QDialog, \QVBoxLayout, QLineEdit, QPushButton, QListWidget, QMessageBox, QLabel, QFileDialog
from PyQt5.QtGui import QSyntaxHighlighter, QTextCharFormat, QColor, QFont, QTextCursor, \QTextDocument  # 添加QTextDocument到导入列表
from PyQt5.QtCore import QRegularExpressionclass MyWindow(QMainWindow):def __init__(self):super().__init__()self.init_ui()def init_ui(self):self.setWindowTitle("一个黑客创业者：文本编辑器")# 设置主部件self.textEdit = QTextEdit()self.setCentralWidget(self.textEdit)# 样式设置self.textEdit.setStyleSheet("""background-color: #2d2d2d;color: #ffffff;font-size: 14px;font-family: "Consolas";""")self.syntaxHighlighter = SyntaxHighlighter(self.textEdit.document())# 状态栏self.statusBar = QStatusBar()self.setStatusBar(self.statusBar)self.statusBar.showMessage('状态栏')self.statusBar.setStyleSheet("""background-color: #3f3f3f;color: #ffffff;font-size: 12px;""")# 菜单栏menu_bar = QMenuBar()self.setMenuBar(menu_bar)menu_bar.setStyleSheet("""background-color: #3f3f3f;color: #ffffff;font-size: 14px;""")# 文件菜单file_menu = menu_bar.addMenu("文件")self.create_file = file_menu.addAction("新建")self.create_file.setShortcut('Ctrl+N')self.create_file.triggered.connect(self.newFile)self.open = file_menu.addAction("打开")self.open.setShortcut("Ctrl+O")self.open.triggered.connect(self.openFile)self.save = file_menu.addAction("保存")self.save.setShortcut("Ctrl+S")self.save.triggered.connect(self.saveFile)self.exit = file_menu.addAction("退出")self.exit.setShortcut("Ctrl+E")self.exit.triggered.connect(qApp.quit)# 编辑菜单edit_menu = menu_bar.addMenu("编辑")edit_menu.addAction("复制").triggered.connect(self.textEdit.copy)edit_menu.addAction("粘贴").triggered.connect(self.textEdit.paste)edit_menu.addAction("剪切").triggered.connect(self.textEdit.cut)# 查找菜单search_menu = menu_bar.addMenu("查找")self.find_action = search_menu.addAction("查找")self.find_action.setShortcut("Ctrl+F")self.find_action.triggered.connect(self.showFindDialog)# 字数统计标签self.word_count_label = QLabel(self)self.statusBar.addPermanentWidget(self.word_count_label)self.update_word_count()self.textEdit.textChanged.connect(self.update_word_count)def newFile(self):self.textEdit.clear()self.statusBar.showMessage('新文件')def openFile(self):fileName, _ = QFileDialog.getOpenFileName(self, '打开文件', '', '文本文件 (*.txt);;所有文件 (*)')if fileName:with open(fileName, 'r', encoding='utf-8') as file:self.textEdit.setText(file.read())self.statusBar.showMessage('打开新文件')def saveFile(self):fileName, _ = QFileDialog.getSaveFileName(self, '保存文件', '', '文本文件 (*.txt);;所有文件 (*)')if fileName:with open(fileName, 'w', encoding='utf-8') as file:file.write(self.textEdit.toPlainText())def showFindDialog(self):find_dialog = QDialog(self)find_dialog.setWindowTitle("查找")layout = QVBoxLayout(find_dialog)self.search_edit = QLineEdit(find_dialog)self.search_button = QPushButton("查找", find_dialog)self.results_list = QListWidget(find_dialog)layout.addWidget(self.search_edit)layout.addWidget(self.search_button)layout.addWidget(self.results_list)self.search_button.clicked.connect(self.performSearch)find_dialog.exec_()def performSearch(self):query = self.search_edit.text()if not query:QMessageBox.warning(self, "警告", "请输入要查找的内容")returndocument = self.textEdit.document()cursor = QTextCursor(document)found_occurrences = Falsewhile True:cursor = document.find(query, cursor,QTextDocument.FindCaseSensitively | QTextDocument.FindWholeWords)if cursor.isNull():breakfound_occurrences = Trueselection_start = cursor.selectionStart()selection_end = cursor.selectionEnd()self.highlightFoundText(selection_start, selection_end)if not found_occurrences:QMessageBox.information(self, "信息", f"未找到 '{query}'")def highlightFoundText(self, start_pos, end_pos):extra_selections = []selection_format = QTextCharFormat()selection_format.setBackground(QColor("yellow"))selection = QTextEdit.ExtraSelection()selection.format = selection_formatselection.cursor.setPosition(start_pos, QTextCursor.MoveAnchor)selection.cursor.setPosition(end_pos, QTextCursor.KeepAnchor)extra_selections.append(selection)self.textEdit.setExtraSelections(extra_selections)def update_word_count(self):text = self.textEdit.toPlainText()words = len(re.findall(r'\b\w+\b', text))self.word_count_label.setText(f'字数: {words}')class SyntaxHighlighter(QSyntaxHighlighter):def __init__(self, parent=None):super().__init__(parent)keywordFormat = QTextCharFormat()keywordFormat.setForeground(QColor("blue"))keywordFormat.setFontWeight(QFont.Bold)commentFormat = QTextCharFormat()commentFormat.setForeground(QColor("green"))commentFormat.setFontItalic(True)stringFormat = QTextCharFormat()stringFormat.setForeground(QColor("red"))stringFormat.setFontWeight(QFont.Bold)keywords = ["def", "class", "import", "from", "if", "else", "elif", "for", "while", "return", "try", "except"]self.highlightingRules = []for word in keywords:escaped_word = re.escape(word)rule = QRegularExpression(rf"\b{escaped_word}\b")self.highlightingRules.append((rule, keywordFormat))rule = QRegularExpression(r"#[^\n]*")self.highlightingRules.append((rule, commentFormat))rule = QRegularExpression(r'"([^"\\]|\\.)*"')self.highlightingRules.append((rule, stringFormat))def highlightBlock(self, text):for pattern, format in self.highlightingRules:matchIterator = pattern.globalMatch(text)while matchIterator.hasNext():match = matchIterator.next()self.setFormat(match.capturedStart(), match.capturedLength(), format)if __name__ == "__main__":app = QApplication(sys.argv)# 应用全局样式表app.setStyleSheet("""QMainWindow {background-color: #2d2d2d;}QMenuBar {background-color: #3f3f3f;color: #ffffff;font-size: 14px;}QStatusBar {background-color: #3f3f3f;color: #ffffff;font-size: 12px;}QTextEdit {background-color: #2d2d2d;color: #ffffff;font-size: 14px;font-family: "Consolas";}QPushButton {background-color: #3f3f3f;color: #ffffff;border: 1px solid #2d2d2d;padding: 5px;font-size: 12px;}QLineEdit {background-color: #2d2d2d;color: #ffffff;border: 1px solid #2d2d2d;padding: 3px;font-size: 12px;}QListWidget {background-color: #2d2d2d;color: #ffffff;font-size: 12px;}""")w = MyWindow()w.resize(600, 400)w.show()sys.exit(app.exec_())