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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibVT/Line.h>
#include <string.h>
namespace VT {
Line::Line(u16 length)
{
set_length(length);
}
Line::~Line()
{
if (m_utf32)
delete[] m_code_points.as_u32;
else
delete[] m_code_points.as_u8;
delete[] m_attributes;
}
template<typename CodepointType>
static CodepointType* create_new_code_point_array(size_t new_length, const CodepointType* old_code_points, size_t old_length)
{
auto* new_code_points = new CodepointType[new_length];
for (size_t i = 0; i < new_length; ++i)
new_code_points[i] = ' ';
if (old_code_points) {
for (size_t i = 0; i < min(old_length, new_length); ++i) {
new_code_points[i] = old_code_points[i];
}
}
delete[] old_code_points;
return new_code_points;
}
void Line::set_length(u16 new_length)
{
if (m_length == new_length)
return;
if (m_utf32)
m_code_points.as_u32 = create_new_code_point_array<u32>(new_length, m_code_points.as_u32, m_length);
else
m_code_points.as_u8 = create_new_code_point_array<u8>(new_length, m_code_points.as_u8, m_length);
auto* new_attributes = new Attribute[new_length];
if (m_attributes) {
for (size_t i = 0; i < min(m_length, new_length); ++i)
new_attributes[i] = m_attributes[i];
}
delete[] m_attributes;
m_attributes = new_attributes;
m_length = new_length;
}
void Line::clear(Attribute attribute)
{
if (m_dirty) {
for (u16 i = 0; i < m_length; ++i) {
set_code_point(i, ' ');
m_attributes[i] = attribute;
}
return;
}
for (unsigned i = 0; i < m_length; ++i) {
if (code_point(i) != ' ')
m_dirty = true;
set_code_point(i, ' ');
}
for (unsigned i = 0; i < m_length; ++i) {
if (m_attributes[i] != attribute)
m_dirty = true;
m_attributes[i] = attribute;
}
}
bool Line::has_only_one_background_color() const
{
if (!m_length)
return true;
// FIXME: Cache this result?
auto color = m_attributes[0].background_color;
for (size_t i = 1; i < m_length; ++i) {
if (m_attributes[i].background_color != color)
return false;
}
return true;
}
void Line::convert_to_utf32()
{
ASSERT(!m_utf32);
auto* new_code_points = new u32[m_length];
for (size_t i = 0; i < m_length; ++i) {
new_code_points[i] = m_code_points.as_u8[i];
}
delete m_code_points.as_u8;
m_code_points.as_u32 = new_code_points;
m_utf32 = true;
}
}
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