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/*
* Ricochet - A minimalist CLI web browser for fast, distraction-free navigation.
* Copyright (C) 2026 Richard Qin
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "paint.hh"
#include "ricochet/tui/view.hh"
#include "text.hh"
#include <cstddef>
#include <cstdint>
#include <optional>
#include <span>
#include <variant>
#include <vector>
namespace ricochet::tui::detail {
using HitTarget = std::variant<LinkId, ControlId>;
struct LayoutPoint
{
std::size_t row { 0 };
std::int64_t column { 0 };
};
struct LayoutHit
{
DisplayPosition position {};
DocumentRange unit {};
std::optional<HitTarget> target {};
};
struct LayoutGlyph
{
LayoutPoint position {};
int columns { 0 };
std::wstring text {};
TextStyle style {};
DocumentRange source {};
std::optional<HitTarget> target {};
// Clip bounds are in document-layout columns and also constrain hit testing.
std::int64_t clip_left { 0 };
std::int64_t clip_right { 0 };
// Structural boundaries locate anchors but do not displace nearby text hits.
bool boundary_only { false };
std::int64_t line_start { 0 };
bool decoration { false };
bool line_break { false };
bool fill { false };
};
struct LayoutData
{
// Reading order, including table cells in row/cell order; not screen order.
std::vector<LayoutGlyph> glyphs {};
std::size_t rows { 1 };
std::int64_t extent { 0 };
};
// A derived snapshot for one Document + initial control values + width/scrolls.
// Editing will supply a separate draft snapshot; this stage uses revision zero.
// No ncurses headers, terminal objects or business-module dependencies.
class DocumentLayout
{
public:
DocumentLayout( const Document& document,
const TextService& text,
int columns,
std::span<const HorizontalScroll> scrolls );
int columns() const;
std::size_t rows() const;
std::optional<LayoutPoint> locate( const DisplayPosition& position ) const;
std::optional<LayoutHit> hit( LayoutPoint point ) const;
void append_frame( Frame& frame, std::size_t first_row, CellPoint origin, ScreenSize viewport ) const;
private:
int columns_;
LayoutData data_;
};
} // namespace ricochet::tui::detail
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