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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++ #include "mainwindow.h"
++
++ #include <QtWidgets>
++
++ MainWindow::MainWindow()
++ {
++ QMenu *fileMenu = new QMenu(tr("&File"));
++
++ fileMenu->addAction(tr("&Open..."), QKeySequence(tr("Ctrl+O", "File|Open")),
++ this, &MainWindow::openFile);
++
++ QAction *quitAction = fileMenu->addAction(tr("E&xit"), this, &MainWindow::close);
++ quitAction->setShortcut(tr("Ctrl+Q"));
++
++ QMenu *editMenu = new QMenu(tr("&Edit"));
++
++ cutAction = editMenu->addAction(tr("Cu&t"), this, &MainWindow::cutSelection);
++ cutAction->setShortcut(tr("Ctrl+X"));
++ cutAction->setEnabled(false);
++
++ copyAction = editMenu->addAction(tr("&Copy"), this, &MainWindow::copySelection);
++ copyAction->setShortcut(tr("Ctrl+C"));
++ copyAction->setEnabled(false);
++
++ pasteAction = editMenu->addAction(tr("&Paste"), this, &MainWindow::pasteSelection);
++ pasteAction->setShortcut(tr("Ctrl+V"));
++ pasteAction->setEnabled(false);
++
++ QMenu *selectMenu = new QMenu(tr("&Select"));
++ selectMenu->addAction(tr("&Word"), this, &MainWindow::selectWord);
++ selectMenu->addAction(tr("&Line"), this, &MainWindow::selectLine);
++ selectMenu->addAction(tr("&Block"), this, &MainWindow::selectBlock);
++ selectMenu->addAction(tr("&Frame"), this, &MainWindow::selectFrame);
++
++ menuBar()->addMenu(fileMenu);
++ menuBar()->addMenu(editMenu);
++ menuBar()->addMenu(selectMenu);
++
++ editor = new QTextEdit(this);
++ document = new QTextDocument(this);
++ editor->setDocument(document);
++
++ connect(editor, &QTextEdit::selectionChanged,
++ this, &MainWindow::updateMenus);
++
++ setCentralWidget(editor);
++ setWindowTitle(tr("Text Document Writer"));
++ }
++
++ void MainWindow::openFile()
++ {
++ QString fileName = QFileDialog::getOpenFileName(this,
++ tr("Open file"), currentFile, "HTML files (*.html);;Text files (*.txt)");
++
++ if (!fileName.isEmpty()) {
++ QFileInfo info(fileName);
++ if (info.completeSuffix() == "html") {
++ QFile file(fileName);
++
++ if (file.open(QFile::ReadOnly)) {
++ editor->setHtml(QString(file.readAll()));
++ file.close();
++ currentFile = fileName;
++ }
++ } else if (info.completeSuffix() == "txt") {
++ QFile file(fileName);
++
++ if (file.open(QFile::ReadOnly)) {
++ editor->setPlainText(file.readAll());
++ file.close();
++ currentFile = fileName;
++ }
++ }
++ }
++ }
++
++ void MainWindow::cutSelection()
++ {
++ QTextCursor cursor = editor->textCursor();
++ if (cursor.hasSelection()) {
++ selection = cursor.selection();
++ cursor.removeSelectedText();
++ }
++ }
++
++ void MainWindow::copySelection()
++ {
++ QTextCursor cursor = editor->textCursor();
++ if (cursor.hasSelection()) {
++ selection = cursor.selection();
++ cursor.clearSelection();
++ }
++ }
++
++ void MainWindow::pasteSelection()
++ {
++ QTextCursor cursor = editor->textCursor();
++ cursor.insertFragment(selection);
++ }
++
++ void MainWindow::selectWord()
++ {
++ QTextCursor cursor = editor->textCursor();
++
++ //! [0]
++ cursor.beginEditBlock();
++ //! [1]
++ cursor.movePosition(QTextCursor::StartOfWord);
++ cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
++ //! [1]
++ cursor.endEditBlock();
++ //! [0]
++
++ editor->setTextCursor(cursor);
++ }
++
++ void MainWindow::selectLine()
++ {
++ QTextCursor cursor = editor->textCursor();
++
++ cursor.beginEditBlock();
++ cursor.movePosition(QTextCursor::StartOfLine);
++ cursor.movePosition(QTextCursor::EndOfLine, QTextCursor::KeepAnchor);
++ cursor.endEditBlock();
++
++ editor->setTextCursor(cursor);
++ }
++
++ void MainWindow::selectBlock()
++ {
++ QTextCursor cursor = editor->textCursor();
++
++ cursor.beginEditBlock();
++ cursor.movePosition(QTextCursor::StartOfBlock);
++ cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
++ cursor.endEditBlock();
++
++ editor->setTextCursor(cursor);
++ }
++
++ void MainWindow::selectFrame()
++ {
++ QTextCursor cursor = editor->textCursor();
++ QTextFrame *frame = cursor.currentFrame();
++
++ cursor.beginEditBlock();
++ cursor.setPosition(frame->firstPosition());
++ cursor.setPosition(frame->lastPosition(), QTextCursor::KeepAnchor);
++ cursor.endEditBlock();
++
++ editor->setTextCursor(cursor);
++ }
++
++ void MainWindow::updateMenus()
++ {
++ QTextCursor cursor = editor->textCursor();
++ cutAction->setEnabled(cursor.hasSelection());
++ copyAction->setEnabled(cursor.hasSelection());
++
++ pasteAction->setEnabled(!selection.isEmpty());
++ }