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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file Syntax coloring via Gtksourceview and Pango markup.
*/
/* Authors:
* Rafael Siejakowski <rs@rs-math.net>
*
* Copyright (C) 2022 Authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_UI_UI_SYNTAX_H
#define SEEN_UI_UI_SYNTAX_H
#include <memory>
#include <optional>
#include <vector>
#include <gtkmm/textview.h>
#include <glibmm.h>
#include <glibmm/ustring.h>
#include "color.h"
namespace Inkscape::UI::Syntax {
/** The style of a single element in a (Pango markup)-enabled widget. */
struct Style
{
std::optional<Glib::ustring> color;
std::optional<Glib::ustring> background;
uint8_t bold : 1;
uint8_t italic : 1;
uint8_t underline : 1;
Style()
: bold{false}
, italic{false}
, underline{false}
{}
bool isDefault() const { return !color && !background && !bold && !italic && !underline; }
Glib::ustring openingTag() const;
Glib::ustring closingTag() const;
};
/** The styles used for simple XML syntax highlighting. */
struct XMLStyles
{
Style prolog;
Style comment;
Style angular_brackets;
Style tag_name;
Style attribute_name;
Style attribute_value;
Style content;
Style error;
};
/** @brief A formatter for XML syntax, based on Pango markup.
*
* This mechanism is used in the TreeView in the XML Dialog,
* where the syntax highlighting of XML tags is accomplished
* via Pango markup.
*/
class XMLFormatter
{
public:
XMLFormatter() = default;
XMLFormatter(XMLStyles &&styles)
: _style{styles}
{}
void setStyle(XMLStyles const &new_style) { _style = new_style; }
void setStyle(XMLStyles &&new_style) { _style = new_style; }
void openTag(char const *tag_name);
void addAttribute(char const *attribute_name, char const *attribute_value);
Glib::ustring finishTag(bool self_close = false);
Glib::ustring formatContent(char const* content, bool wrap_in_quotes = true) const;
Glib::ustring formatComment(char const* comment, bool wrap_in_comment_marks = true) const;
Glib::ustring formatProlog(char const* prolog) const { return _format(_style.prolog, prolog); }
private:
Glib::ustring _format(Style const &style, Glib::ustring const &content) const;
Glib::ustring _format(Style const &style, char const *content) const
{
return style.openingTag() + Glib::Markup::escape_text(content) + style.closingTag();
}
XMLStyles _style;
Glib::ustring _wip;
};
/// Build XML styles from a GTKSourceView syntax color theme.
XMLStyles build_xml_styles(const Glib::ustring& syntax_theme);
/// Syntax highlighting mode (language).
enum class SyntaxMode
{
PlainText, ///< Plain text (no highlighting).
InlineCss, ///< Inline CSS (contents of a style="..." attribute).
CssStyle, ///< File-scope CSS (contents of a CSS file or a <style> tag).
SvgPathData, ///< Contents of the 'd' attribute of the SVG <path> element.
SvgPolyPoints ///< Contents of the 'points' attribute of <polyline> or <polygon>.
};
/// Base class for styled text editing widget.
class TextEditView
{
public:
virtual ~TextEditView() = default;
virtual void setStyle(const Glib::ustring& theme) = 0;
virtual void setText(const Glib::ustring& text) = 0;
virtual Glib::ustring getText() const = 0;
virtual Gtk::TextView& getTextView() const = 0;
static std::unique_ptr<TextEditView> create(SyntaxMode mode);
};
} // namespace Inkscape::UI::Syntax
#endif // SEEN_UI_UI_SYNTAX_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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