readmepanel.cpp

#include "readmepanel.h"
#include <qevent.h>
#include <kservice.h>
#include <KParts/ReadOnlyPart>
#include <QVBoxLayout>
#include <QFileInfo>
#include <QtWidgets>
#include <KColorScheme>

#include "dolphin_readmepanelsettings.h"

ReadmePanel::ReadmePanel ( QWidget* parent ) :
    Panel(parent),
    toggleViewAction(QSharedPointer<QAction>(new QAction(this))),
    m_layout(nullptr),
    m_readmeWidget(nullptr),
    m_markdownPart(nullptr),
    m_readmeUrl(),
    m_textBrowser(nullptr)
{
    m_layout = new QVBoxLayout(this);
    m_layout->setContentsMargins(0, 0, 0, 0);

    toggleViewAction->setCheckable(true);
    toggleViewAction->setMenuRole(QAction::NoRole);
    toggleViewAction->setText("README.md Preview");
    toggleViewAction->setChecked(ReadmePanelSettings::enabled());
    connect(toggleViewAction.get(), SIGNAL(triggered(bool)),
            this, SLOT(toggleView(bool)));
}

void ReadmePanel::toggleView(bool b)
{
    ReadmePanelSettings::setEnabled(b);
    if (b)
        urlChanged();
    else
        hide();
}

void ReadmePanel::show()
{
    if (!m_markdownPart) {
        KPluginFactory* factory = nullptr;
        KService::Ptr service = KService::serviceByDesktopName(QStringLiteral("markdownpart"));
        if (service) {
            factory = KPluginLoader(service->library()).factory();
        }
        m_markdownPart = factory ? (factory->create<KParts::ReadOnlyPart>(this)) : nullptr;
        m_readmeWidget = m_markdownPart->widget();
        configureTextBrowser();
        setFocusProxy(m_readmeWidget);
        m_layout->addWidget(m_readmeWidget);
    }
}

inline void ReadmePanel::configureTextBrowser()
{
    if(!m_textBrowser)
        m_textBrowser = m_readmeWidget->findChild<QTextBrowser *>();
    if(!m_textBrowser) return;
    m_textBrowser->setFrameStyle(0);
    m_textBrowser->setStyleSheet("QTextEdit { background-color: transparent; }");
    m_textBrowser->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    m_textBrowser->setTextColor(KColorScheme::ForegroundRole::NormalText);
}


void ReadmePanel::hide() {
    if(m_markdownPart)
        m_markdownPart->closeUrl();
    this->parentWidget()->hide();
}

bool ReadmePanel::urlChanged()
{
    m_readmeUrl.setUrl((url().toString().append("/README.md")));
    QFileInfo check_file(m_readmeUrl.path());
    if (!m_readmeUrl.isValid() || !check_file.exists() || !toggleViewAction->isChecked()) {
        hide();
        return true;
    }
    show();
    this->parentWidget()->show();
    m_markdownPart->openUrl(m_readmeUrl);
    return true;
}