b7c66233f6
This is preparation for non-destructive terminal resizing which will require more dynamic storage for lines.
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibVT/Line.h>
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namespace VT {
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Line::Line(size_t length)
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{
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set_length(length);
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}
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Line::~Line()
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{
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}
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void Line::set_length(size_t new_length)
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{
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size_t old_length = length();
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if (old_length == new_length)
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return;
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m_cells.resize(new_length);
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}
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void Line::clear(const Attribute& attribute)
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{
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if (m_dirty) {
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for (auto& cell : m_cells) {
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cell = Cell { .code_point = ' ', .attribute = attribute };
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}
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return;
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}
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for (auto& cell : m_cells) {
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if (!m_dirty)
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m_dirty = cell.code_point != ' ' || cell.attribute != attribute;
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cell = Cell { .code_point = ' ', .attribute = attribute };
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}
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}
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bool Line::has_only_one_background_color() const
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{
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if (!length())
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return true;
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// FIXME: Cache this result?
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auto color = attribute_at(0).effective_background_color();
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for (size_t i = 1; i < length(); ++i) {
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if (attribute_at(i).effective_background_color() != color)
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return false;
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}
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return true;
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}
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}
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