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https://github.com/LadybirdBrowser/ladybird.git
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54ab6fe5b9
Automarks are similar to bookmarks placed by the terminal, allowing the user to selectively remove a single command and its output from the terminal scrollback. This commit implements a single way to add marks: automatically placing them when the shell becomes interactive. To make sure the shell behaves correctly after its expected prompt position changes, the terminal layer forces a resize event to be passed to the shell on such (possibly) partial clears; this also has the nice side effect of fixing the disappearing prompt on the preexisting "clear including history" action: Fixes #4192.
110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/AnyOf.h>
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#include <AK/DistinctNumeric.h>
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#include <AK/Noncopyable.h>
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#include <AK/Vector.h>
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#include <LibVT/Attribute.h>
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#include <LibVT/Position.h>
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#include <LibVT/XtermColors.h>
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namespace VT {
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AK_TYPEDEF_DISTINCT_ORDERED_ID(u32, Mark);
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inline static constexpr Mark Unmarked = 0;
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class Line {
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AK_MAKE_NONCOPYABLE(Line);
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AK_MAKE_NONMOVABLE(Line);
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public:
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explicit Line(size_t length);
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~Line() = default;
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struct Cell {
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u32 code_point { ' ' };
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Attribute attribute;
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bool operator!=(Cell const& other) const { return code_point != other.code_point || attribute != other.attribute; }
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};
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Attribute const& attribute_at(size_t index) const { return m_cells[index].attribute; }
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Attribute& attribute_at(size_t index) { return m_cells[index].attribute; }
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Cell& cell_at(size_t index) { return m_cells[index]; }
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Cell const& cell_at(size_t index) const { return m_cells[index]; }
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void clear(Attribute const& attribute = Attribute())
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{
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m_terminated_at.clear();
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m_mark = Unmarked;
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clear_range(0, m_cells.size() - 1, attribute);
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}
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void clear_range(size_t first_column, size_t last_column, Attribute const& attribute = Attribute());
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bool has_only_one_background_color() const;
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bool is_empty() const
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{
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return !any_of(m_cells, [](auto& cell) { return cell != Cell(); });
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}
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size_t length() const
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{
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return m_cells.size();
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}
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void set_length(size_t);
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void rewrap(size_t new_length, Line* next_line, CursorPosition* cursor, bool cursor_is_on_next_line = true);
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u32 code_point(size_t index) const
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{
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return m_cells[index].code_point;
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}
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void set_code_point(size_t index, u32 code_point)
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{
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if (m_terminated_at.has_value()) {
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if (index > *m_terminated_at) {
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m_terminated_at = index + 1;
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}
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}
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m_cells[index].code_point = code_point;
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}
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bool is_dirty() const { return m_dirty; }
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void set_dirty(bool b) { m_dirty = b; }
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Optional<Mark> mark() const
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{
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return m_mark == Unmarked ? OptionalNone {} : Optional<Mark>(m_mark);
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}
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void set_marked(Mark mark)
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{
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set_dirty(m_mark != mark);
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m_mark = mark;
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}
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Optional<u16> termination_column() const { return m_terminated_at; }
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void set_terminated(u16 column) { m_terminated_at = column; }
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private:
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void take_cells_from_next_line(size_t new_length, Line* next_line, bool cursor_is_on_next_line, CursorPosition* cursor);
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void push_cells_into_next_line(size_t new_length, Line* next_line, bool cursor_is_on_next_line, CursorPosition* cursor);
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Vector<Cell> m_cells;
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Mark m_mark { Unmarked };
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bool m_dirty { false };
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// Note: The alignment is 8, so this member lives in the padding (that already existed before it was introduced)
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[[no_unique_address]] Optional<u16> m_terminated_at;
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};
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}
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