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https://github.com/RGBCube/serenity
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LibVT: Make VT::Line use a Vector for storage
This is preparation for non-destructive terminal resizing which will require more dynamic storage for lines.
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5 changed files with 60 additions and 123 deletions
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@ -25,103 +25,52 @@
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*/
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#include <LibVT/Line.h>
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#include <string.h>
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namespace VT {
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Line::Line(u16 length)
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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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if (m_utf32)
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delete[] m_code_points.as_u32;
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else
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delete[] m_code_points.as_u8;
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delete[] m_attributes;
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}
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template<typename CodepointType>
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static CodepointType* create_new_code_point_array(size_t new_length, const CodepointType* old_code_points, size_t old_length)
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void Line::set_length(size_t new_length)
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{
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auto* new_code_points = new CodepointType[new_length];
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for (size_t i = 0; i < new_length; ++i)
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new_code_points[i] = ' ';
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if (old_code_points) {
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for (size_t i = 0; i < min(old_length, new_length); ++i) {
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new_code_points[i] = old_code_points[i];
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}
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}
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delete[] old_code_points;
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return new_code_points;
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}
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void Line::set_length(u16 new_length)
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{
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if (m_length == new_length)
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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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if (m_utf32)
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m_code_points.as_u32 = create_new_code_point_array<u32>(new_length, m_code_points.as_u32, m_length);
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else
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m_code_points.as_u8 = create_new_code_point_array<u8>(new_length, m_code_points.as_u8, m_length);
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auto* new_attributes = new Attribute[new_length];
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if (m_attributes) {
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for (size_t i = 0; i < min(m_length, new_length); ++i)
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new_attributes[i] = m_attributes[i];
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}
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delete[] m_attributes;
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m_attributes = new_attributes;
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m_length = new_length;
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m_cells.resize(new_length);
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}
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void Line::clear(Attribute attribute)
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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 (u16 i = 0; i < m_length; ++i) {
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set_code_point(i, ' ');
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m_attributes[i] = attribute;
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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 (unsigned i = 0; i < m_length; ++i) {
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if (code_point(i) != ' ')
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m_dirty = true;
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set_code_point(i, ' ');
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}
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for (unsigned i = 0; i < m_length; ++i) {
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if (m_attributes[i] != attribute)
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m_dirty = true;
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m_attributes[i] = attribute;
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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 (!m_length)
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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 = m_attributes[0].effective_background_color();
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for (size_t i = 1; i < m_length; ++i) {
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if (m_attributes[i].effective_background_color() != color)
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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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void Line::convert_to_utf32()
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{
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VERIFY(!m_utf32);
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auto* new_code_points = new u32[m_length];
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for (size_t i = 0; i < m_length; ++i) {
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new_code_points[i] = m_code_points.as_u8[i];
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}
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delete m_code_points.as_u8;
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m_code_points.as_u32 = new_code_points;
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m_utf32 = true;
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}
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}
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