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LibCards/CardStack: Helper to update the cards' disabled flags
This adds a little helper in Cards::CardStack that updates the disabled flags for its cards depending on a movement rule. It does this by searching from the bottom up for the last card that is valid. It then sets the disabled flag for all cards above that card, if it isn't upside down.
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2 changed files with 55 additions and 0 deletions
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2020, Till Mayer <till.mayer@web.de>
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* Copyright (c) 2023, David Ganz <david.g.ganz@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -205,6 +206,57 @@ ErrorOr<void> CardStack::add_all_grabbed_cards(Gfx::IntPoint click_location, Vec
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return {};
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}
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void CardStack::update_disabled_cards(MovementRule movement_rule)
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{
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if (m_stack.is_empty())
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return;
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for (auto& card : m_stack)
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card->set_disabled(false);
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Optional<size_t> last_valid_card = {};
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uint8_t last_rank;
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Color last_color;
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for (size_t idx = m_stack.size(); idx > 0; idx--) {
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auto i = idx - 1;
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auto card = m_stack[i];
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if (card->is_upside_down()) {
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if (!last_valid_card.has_value())
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last_valid_card = i + 1;
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break;
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}
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if (i != m_stack.size() - 1) {
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bool color_valid;
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switch (movement_rule) {
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case MovementRule::Alternating:
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color_valid = card->color() != last_color;
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break;
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case MovementRule::Same:
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color_valid = card->color() == last_color;
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break;
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case MovementRule::Any:
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color_valid = true;
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break;
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}
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if (!color_valid || to_underlying(card->rank()) != last_rank + 1) {
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last_valid_card = i + 1;
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break;
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}
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}
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last_rank = to_underlying(card->rank());
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last_color = card->color();
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}
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if (!last_valid_card.has_value())
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return;
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for (size_t i = 0; i < last_valid_card.value(); i++)
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m_stack[i]->set_disabled(true);
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}
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bool CardStack::is_allowed_to_push(Card const& card, size_t stack_size, MovementRule movement_rule) const
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{
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if (m_type == Type::Stock || m_type == Type::Waste || m_type == Type::Play)
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