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/* Classes for printing labelled rulers.
Copyright (C) 2023 Free Software Foundation, Inc.
Contributed by David Malcolm <dmalcolm@redhat.com>.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_TEXT_ART_RULER_H
#define GCC_TEXT_ART_RULER_H
#include "text-art/canvas.h"
namespace text_art {
/* A way to annotate a series of ranges of canvas coordinates
with text labels either above or, in this example, below:
├───────┬───────┼───────┬───────┼───────┬───────┤
│ │ │
label A label B label C
with logic to ensure that the text labels don't overlap
when printed. */
class x_ruler
{
public:
enum class label_dir { ABOVE, BELOW };
enum class label_kind
{
TEXT,
TEXT_WITH_BORDER
};
x_ruler (label_dir dir)
: m_label_dir (dir),
m_size (canvas::size_t (0, 0)),
m_has_layout (false)
{}
void add_label (const canvas::range_t &r,
styled_string text,
style::id_t style_id,
label_kind kind = label_kind::TEXT);
canvas::size_t get_size ()
{
ensure_layout ();
return m_size;
}
void paint_to_canvas (canvas &canvas,
canvas::coord_t offset,
const theme &theme);
void debug (const style_manager &sm);
private:
/* A particular label within an x_ruler.
Consider e.g.:
# x: 01234567890123456789012345678901234567890123456789
# y: 0: ├───────┬───────┼───────┬───────┼───────┬───────┤
# 1: │ │ │
# 2: label A label B label C
#
Then "label A" is:
# m_connector_x == 8
# V
# x: 0123456789012
# y: 0: ┬
# 1: │
# 2: label A
# x: 0123456789012
# ^
# m_text_coord.x == 6
and m_text_coord is (2, 6).
The y cooordinates are stored with respect to label_dir::BELOW;
for label_dir::ABOVE we flip them when painting the ruler. */
class label
{
friend class x_ruler;
public:
label (const canvas::range_t &range, styled_string text, style::id_t style_id,
label_kind kind);
bool operator< (const label &other) const;
private:
canvas::range_t m_range;
styled_string m_text;
style::id_t m_style_id;
label_kind m_kind;
canvas::rect_t m_text_rect; // includes any border
int m_connector_x;
};
void ensure_layout ();
void update_layout ();
int get_canvas_y (int rel_y) const;
label_dir m_label_dir;
std::vector<label> m_labels;
canvas::size_t m_size;
bool m_has_layout = false;
};
} // namespace text_art
#endif /* GCC_TEXT_ART_RULER_H */
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