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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of QLiteHtml.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#include <litehtml.h>
#include <QFont>
#include <QHash>
#include <QPaintDevice>
#include <QPixmap>
#include <QRect>
#include <QString>
#include <QTextDocument>
#include <QUrl>
#include <functional>
#include <unordered_map>
class Selection
{
public:
struct Element
{
litehtml::element::ptr element;
int index = -1;
int x = -1;
};
enum class Mode { Free, Word };
bool isValid() const;
void update();
QRect boundingRect() const;
Element startElem;
Element endElem;
QVector<QRect> selection;
QString text;
QPoint selectionStartDocumentPos;
Mode mode = Mode::Free;
bool isSelecting = false;
};
struct Index
{
QString text;
// only contains leaf elements
std::unordered_map<litehtml::element::ptr, int> elementToIndex;
using Entry = std::pair<int, litehtml::element::ptr>;
std::vector<Entry> indexToElement;
Entry findElement(int index) const;
};
class DocumentContainer : public litehtml::document_container
{
public:
DocumentContainer();
virtual ~DocumentContainer();
public: // document_container API
litehtml::uint_ptr create_font(const litehtml::tchar_t *faceName,
int size,
int weight,
litehtml::font_style italic,
unsigned int decoration,
litehtml::font_metrics *fm) override;
void delete_font(litehtml::uint_ptr hFont) override;
int text_width(const litehtml::tchar_t *text, litehtml::uint_ptr hFont) override;
void draw_text(litehtml::uint_ptr hdc,
const litehtml::tchar_t *text,
litehtml::uint_ptr hFont,
litehtml::web_color color,
const litehtml::position &pos) override;
int pt_to_px(int pt) override;
int get_default_font_size() const override;
const litehtml::tchar_t *get_default_font_name() const override;
void draw_list_marker(litehtml::uint_ptr hdc, const litehtml::list_marker &marker) override;
void load_image(const litehtml::tchar_t *src,
const litehtml::tchar_t *baseurl,
bool redraw_on_ready) override;
void get_image_size(const litehtml::tchar_t *src,
const litehtml::tchar_t *baseurl,
litehtml::size &sz) override;
void draw_background(litehtml::uint_ptr hdc, const litehtml::background_paint &bg) override;
void draw_borders(litehtml::uint_ptr hdc,
const litehtml::borders &borders,
const litehtml::position &draw_pos,
bool root) override;
void set_caption(const litehtml::tchar_t *caption) override;
void set_base_url(const litehtml::tchar_t *base_url) override;
void link(const std::shared_ptr<litehtml::document> &doc,
const litehtml::element::ptr &el) override;
void on_anchor_click(const litehtml::tchar_t *url, const litehtml::element::ptr &el) override;
void set_cursor(const litehtml::tchar_t *cursor) override;
void transform_text(litehtml::tstring &text, litehtml::text_transform tt) override;
void import_css(litehtml::tstring &text,
const litehtml::tstring &url,
litehtml::tstring &baseurl) override;
void set_clip(const litehtml::position &pos,
const litehtml::border_radiuses &bdr_radius,
bool valid_x,
bool valid_y) override;
void del_clip() override;
void get_client_rect(litehtml::position &client) const override;
std::shared_ptr<litehtml::element> create_element(
const litehtml::tchar_t *tag_name,
const litehtml::string_map &attributes,
const std::shared_ptr<litehtml::document> &doc) override;
void get_media_features(litehtml::media_features &media) const override;
void get_language(litehtml::tstring &language, litehtml::tstring &culture) const override;
public: // outside API
void setPaintDevice(QPaintDevice *paintDevice);
void setDocument(const QByteArray &data, litehtml::context *context);
litehtml::document::ptr document() const;
void setScrollPosition(const QPoint &pos);
void render(int width, int height);
// these return areas to redraw in document space
QVector<QRect> mousePressEvent(const QPoint &documentPos,
const QPoint &viewportPos,
Qt::MouseButton button);
QVector<QRect> mouseMoveEvent(const QPoint &documentPos, const QPoint &viewportPos);
QVector<QRect> mouseReleaseEvent(const QPoint &documentPos,
const QPoint &viewportPos,
Qt::MouseButton button);
QVector<QRect> mouseDoubleClickEvent(const QPoint &documentPos,
const QPoint &viewportPos,
Qt::MouseButton button);
QVector<QRect> leaveEvent();
QUrl linkAt(const QPoint &documentPos, const QPoint &viewportPos);
QString caption() const;
QString selectedText() const;
void findText(const QString &text,
QTextDocument::FindFlags flags,
bool incremental,
bool *wrapped,
bool *success,
QVector<QRect> *oldSelection,
QVector<QRect> *newSelection);
void setDefaultFont(const QFont &font);
QFont defaultFont() const;
using DataCallback = std::function<QByteArray(QUrl)>;
void setDataCallback(const DataCallback &callback);
using CursorCallback = std::function<void(QCursor)>;
void setCursorCallback(const CursorCallback &callback);
using LinkCallback = std::function<void(QUrl)>;
void setLinkCallback(const LinkCallback &callback);
using PaletteCallback = std::function<QPalette()>;
void setPaletteCallback(const PaletteCallback &callback);
private:
QPixmap getPixmap(const QString &imageUrl, const QString &baseUrl);
QString serifFont() const;
QString sansSerifFont() const;
QString monospaceFont() const;
QUrl resolveUrl(const QString &url, const QString &baseUrl) const;
void drawSelection(QPainter *painter, const QRect &clip) const;
void buildIndex();
QPaintDevice *m_paintDevice = nullptr;
litehtml::document::ptr m_document;
Index m_index;
QString m_baseUrl;
QRect m_clientRect;
QPoint m_scrollPosition;
QString m_caption;
QFont m_defaultFont = QFont(sansSerifFont(), 16);
QByteArray m_defaultFontFamilyName = m_defaultFont.family().toUtf8();
QHash<QUrl, QPixmap> m_pixmaps;
Selection m_selection;
DataCallback m_dataCallback;
CursorCallback m_cursorCallback;
LinkCallback m_linkCallback;
PaletteCallback m_paletteCallback;
bool m_blockLinks = false;
};
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