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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#pragma once
#include <coreplugin/find/textfindconstants.h>
#include <QFont>
#include <QMenu>
#include <QPrinter>
#include <QString>
#include <QUrl>
#include <QWidget>
namespace Help {
namespace Internal {
class HelpViewer : public QWidget
{
Q_OBJECT
public:
enum class Action {
NewPage = 0x01,
ExternalWindow = 0x02
};
Q_DECLARE_FLAGS(Actions, Action)
explicit HelpViewer(QWidget *parent = nullptr);
~HelpViewer() override;
virtual void setViewerFont(const QFont &font) = 0;
virtual void setScale(qreal scale) = 0;
void setFontZoom(int percentage);
void setScrollWheelZoomingEnabled(bool enabled);
bool isScrollWheelZoomingEnabled() const;
virtual QString title() const = 0;
virtual QUrl source() const = 0;
virtual void setSource(const QUrl &url) = 0;
virtual void setHtml(const QString &html) = 0;
virtual QString selectedText() const = 0;
virtual bool isForwardAvailable() const = 0;
virtual bool isBackwardAvailable() const = 0;
virtual void addBackHistoryItems(QMenu *backMenu) = 0;
virtual void addForwardHistoryItems(QMenu *forwardMenu) = 0;
void setActionVisible(Action action, bool visible);
bool isActionVisible(Action action);
virtual bool findText(const QString &text, Core::FindFlags flags,
bool incremental, bool fromSearch, bool *wrapped = nullptr) = 0;
bool handleForwardBackwardMouseButtons(QMouseEvent *e);
static bool isLocalUrl(const QUrl &url);
static bool canOpenPage(const QString &url);
static QString mimeFromUrl(const QUrl &url);
static bool launchWithExternalApp(const QUrl &url);
void home();
void scaleUp();
void scaleDown();
void resetScale();
virtual void copy() = 0;
virtual void stop() = 0;
virtual void forward() = 0;
virtual void backward() = 0;
virtual void print(QPrinter *printer) = 0;
signals:
void sourceChanged(const QUrl &);
void titleChanged();
void printRequested();
void forwardAvailable(bool);
void backwardAvailable(bool);
void loadFinished();
void newPageRequested(const QUrl &url);
void externalPageRequested(const QUrl &url);
protected:
void wheelEvent(QWheelEvent *event) override;
void slotLoadStarted();
void slotLoadFinished();
void restoreOverrideCursor();
Actions m_visibleActions;
bool m_scrollWheelZoomingEnabled = true;
int m_loadOverrideStack = 0;
private:
void incrementZoom(int steps);
void applyZoom(int percentage);
};
} // namespace Internal
} // namespace Help
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