基于python实现基础的文本编辑器

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 QRegularExpression class 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") return document = self.textEdit.document() cursor = QTextCursor(document) found_occurrences = False while True: cursor = document.find(query, cursor, QTextDocument.FindCaseSensitively | QTextDocument.FindWholeWords) if cursor.isNull(): break found_occurrences = True selection_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_format selection.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_())