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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 "previewpage.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QFileDialog>
#include <QFontDatabase>
#include <QMessageBox>
#include <QStatusBar>
#include <QTextStream>
#include <QWebChannel>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->editor->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
ui->preview->setContextMenuPolicy(Qt::NoContextMenu);
PreviewPage *page = new PreviewPage(this);
ui->preview->setPage(page);
connect(ui->editor, &QPlainTextEdit::textChanged,
[this]() { m_content.setText(ui->editor->toPlainText()); });
QWebChannel *channel = new QWebChannel(this);
channel->registerObject(QStringLiteral("content"), &m_content);
page->setWebChannel(channel);
ui->preview->setUrl(QUrl("qrc:/index.html"));
connect(ui->actionNew, &QAction::triggered, this, &MainWindow::onFileNew);
connect(ui->actionOpen, &QAction::triggered, this, &MainWindow::onFileOpen);
connect(ui->actionSave, &QAction::triggered, this, &MainWindow::onFileSave);
connect(ui->actionSaveAs, &QAction::triggered, this, &MainWindow::onFileSaveAs);
connect(ui->actionExit, &QAction::triggered, this, &QWidget::close);
connect(ui->editor->document(), &QTextDocument::modificationChanged,
ui->actionSave, &QAction::setEnabled);
QFile defaultTextFile(":/default.md");
defaultTextFile.open(QIODevice::ReadOnly);
ui->editor->setPlainText(defaultTextFile.readAll());
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::openFile(const QString &path)
{
QFile f(path);
if (!f.open(QIODevice::ReadOnly)) {
QMessageBox::warning(this, windowTitle(),
tr("Could not open file %1: %2").arg(
QDir::toNativeSeparators(path), f.errorString()));
return;
}
m_filePath = path;
ui->editor->setPlainText(f.readAll());
statusBar()->showMessage(tr("Opened %1").arg(QDir::toNativeSeparators(path)));
}
bool MainWindow::isModified() const
{
return ui->editor->document()->isModified();
}
void MainWindow::onFileNew()
{
if (isModified()) {
QMessageBox::StandardButton button = QMessageBox::question(this, windowTitle(),
tr("You have unsaved changes. Do you want to create a new document anyway?"));
if (button != QMessageBox::Yes)
return;
}
m_filePath.clear();
ui->editor->setPlainText(tr("## New document"));
ui->editor->document()->setModified(false);
}
void MainWindow::onFileOpen()
{
if (isModified()) {
QMessageBox::StandardButton button = QMessageBox::question(this, windowTitle(),
tr("You have unsaved changes. Do you want to open a new document anyway?"));
if (button != QMessageBox::Yes)
return;
}
QFileDialog dialog(this, tr("Open MarkDown File"));
dialog.setMimeTypeFilters({"text/markdown"});
dialog.setAcceptMode(QFileDialog::AcceptOpen);
if (dialog.exec() == QDialog::Accepted)
openFile(dialog.selectedFiles().constFirst());
}
void MainWindow::onFileSave()
{
if (m_filePath.isEmpty()) {
onFileSaveAs();
return;
}
QFile f(m_filePath);
if (!f.open(QIODevice::WriteOnly | QIODevice::Text)) {
QMessageBox::warning(this, windowTitle(),
tr("Could not write to file %1: %2").arg(
QDir::toNativeSeparators(m_filePath), f.errorString()));
return;
}
QTextStream str(&f);
str << ui->editor->toPlainText();
ui->editor->document()->setModified(false);
statusBar()->showMessage(tr("Wrote %1").arg(QDir::toNativeSeparators(m_filePath)));
}
void MainWindow::onFileSaveAs()
{
QFileDialog dialog(this, tr("Save MarkDown File"));
dialog.setMimeTypeFilters({"text/markdown"});
dialog.setAcceptMode(QFileDialog::AcceptSave);
dialog.setDefaultSuffix("md");
if (dialog.exec() != QDialog::Accepted)
return;
m_filePath = dialog.selectedFiles().constFirst();
onFileSave();
}
void MainWindow::closeEvent(QCloseEvent *e)
{
if (isModified()) {
QMessageBox::StandardButton button = QMessageBox::question(this, windowTitle(),
tr("You have unsaved changes. Do you want to exit anyway?"));
if (button != QMessageBox::Yes)
e->ignore();
}
}
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