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LibDraw+LibGUI: Allow changing individual colors in a Palette
Palette is now a value wrapper around a NonnullRefPtr<PaletteImpl>. A new function, set_color(ColorRole, Color) implements a simple copy-on-write mechanism so that we're sharing the PaletteImpl in the common case, but allowing you to create custom palettes if you like, by getting a GWidget's palette, modifying it, and then assigning the modified palette to the widget via GWidget::set_palette(). Use this to make PaintBrush show its palette colors once again. Fixes #943.
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18 changed files with 98 additions and 40 deletions
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#include <LibDraw/Palette.h>
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NonnullRefPtr<Palette> Palette::create_with_shared_buffer(SharedBuffer& buffer)
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NonnullRefPtr<PaletteImpl> PaletteImpl::create_with_shared_buffer(SharedBuffer& buffer)
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{
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return adopt(*new Palette(buffer));
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return adopt(*new PaletteImpl(buffer));
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}
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Palette::Palette(SharedBuffer& buffer)
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PaletteImpl::PaletteImpl(SharedBuffer& buffer)
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: m_theme_buffer(buffer)
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{
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}
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Palette::Palette(const PaletteImpl& impl)
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: m_impl(impl)
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{
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}
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Palette::~Palette()
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{
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}
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const SystemTheme& Palette::theme() const
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const SystemTheme& PaletteImpl::theme() const
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{
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return *(const SystemTheme*)m_theme_buffer->data();
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}
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Color Palette::color(ColorRole role) const
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Color PaletteImpl::color(ColorRole role) const
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{
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ASSERT((int)role < (int)ColorRole::__Count);
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return theme().color[(int)role];
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}
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NonnullRefPtr<PaletteImpl> PaletteImpl::clone() const
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{
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auto new_theme_buffer = SharedBuffer::create_with_size(m_theme_buffer->size());
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memcpy(new_theme_buffer->data(), m_theme_buffer->data(), m_theme_buffer->size());
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return adopt(*new PaletteImpl(*new_theme_buffer));
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}
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void Palette::set_color(ColorRole role, Color color)
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{
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if (m_impl->ref_count() != 1)
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m_impl = m_impl->clone();
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auto& theme = const_cast<SystemTheme&>(impl().theme());
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theme.color[(int)role] = color;
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}
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