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/*
* Copyright (c) 2020-2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/DeprecatedString.h>
#include <AK/Forward.h>
#include <LibLine/StringMetrics.h>
#include <LibLine/SuggestionManager.h>
namespace Line {
class Editor;
class SuggestionDisplay {
public:
virtual ~SuggestionDisplay() = default;
virtual ErrorOr<void> display(SuggestionManager const&) = 0;
virtual ErrorOr<bool> cleanup() = 0;
virtual void finish() = 0;
virtual void set_initial_prompt_lines(size_t) = 0;
ErrorOr<void> redisplay(SuggestionManager const& manager, size_t lines, size_t columns)
{
if (m_is_showing_suggestions) {
TRY(cleanup());
set_vt_size(lines, columns);
TRY(display(manager));
} else {
set_vt_size(lines, columns);
}
return {};
}
virtual void set_vt_size(size_t lines, size_t columns) = 0;
size_t origin_row() const { return m_origin_row; }
size_t origin_col() const { return m_origin_column; }
void set_origin(int row, int col, Badge<Editor>)
{
m_origin_row = row;
m_origin_column = col;
}
protected:
void did_display() { m_is_showing_suggestions = true; }
void did_cleanup() { m_is_showing_suggestions = false; }
int m_origin_row { 0 };
int m_origin_column { 0 };
bool m_is_showing_suggestions { false };
};
class XtermSuggestionDisplay : public SuggestionDisplay {
public:
XtermSuggestionDisplay(size_t lines, size_t columns)
: m_num_lines(lines)
, m_num_columns(columns)
{
}
virtual ~XtermSuggestionDisplay() override = default;
virtual ErrorOr<void> display(SuggestionManager const&) override;
virtual ErrorOr<bool> cleanup() override;
virtual void finish() override
{
m_pages.clear();
}
virtual void set_initial_prompt_lines(size_t lines) override
{
m_prompt_lines_at_suggestion_initiation = lines;
}
virtual void set_vt_size(size_t lines, size_t columns) override
{
m_num_lines = lines;
m_num_columns = columns;
m_pages.clear();
}
private:
size_t fit_to_page_boundary(size_t selection_index);
size_t m_lines_used_for_last_suggestions { 0 };
size_t m_num_lines { 0 };
size_t m_num_columns { 0 };
size_t m_prompt_lines_at_suggestion_initiation { 0 };
struct PageRange {
size_t start;
size_t end;
};
Vector<PageRange> m_pages;
};
}
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