cranpose-core 0.0.60

Core runtime for a Jetpack Compose inspired UI framework in Rust
Documentation 
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use super::key_state::FrameKeyState;
use super::siblings::SiblingIndex;
use crate::AnchorId;

#[derive(Default)]
pub(in crate::slot) struct RootFrame {
    pub(in crate::slot) next_child_index: usize,
    pub(in crate::slot) detach_remaining_children: bool,
    pub(in crate::slot) keys: FrameKeyState,
    pub(in crate::slot) sibling_index: Option<SiblingIndex>,
}

pub(in crate::slot) struct GroupFrame {
    pub(in crate::slot) group_anchor: AnchorId,
    pub(in crate::slot) next_child_index: usize,
    pub(in crate::slot) payload_cursor: usize,
    pub(in crate::slot) old_payload_len: usize,
    pub(in crate::slot) node_cursor: usize,
    pub(in crate::slot) old_node_len: usize,
    pub(in crate::slot) keys: FrameKeyState,
    pub(in crate::slot) sibling_index: Option<SiblingIndex>,
    pub(in crate::slot) body_finished: bool,
    pub(in crate::slot) was_skipped: bool,
}

impl RootFrame {
    pub(in crate::slot) fn reset(&mut self, detach_remaining_children: bool) {
        self.next_child_index = 0;
        self.detach_remaining_children = detach_remaining_children;
        self.keys.clear();
        self.sibling_index = None;
    }
}

impl Default for GroupFrame {
    fn default() -> Self {
        Self {
            group_anchor: AnchorId::INVALID,
            next_child_index: 0,
            payload_cursor: 0,
            old_payload_len: 0,
            node_cursor: 0,
            old_node_len: 0,
            keys: FrameKeyState::default(),
            sibling_index: None,
            body_finished: false,
            was_skipped: false,
        }
    }
}

impl GroupFrame {
    pub(in crate::slot) fn reset(
        &mut self,
        anchor: AnchorId,
        next_child_index: usize,
        old_payload_len: usize,
        old_node_len: usize,
    ) {
        self.group_anchor = anchor;
        self.next_child_index = next_child_index;
        self.payload_cursor = 0;
        self.old_payload_len = old_payload_len;
        self.node_cursor = 0;
        self.old_node_len = old_node_len;
        self.keys.clear();
        self.sibling_index = None;
        self.body_finished = false;
        self.was_skipped = false;
    }

    pub(in crate::slot) fn reset_for_pool(&mut self) {
        self.reset(AnchorId::INVALID, 0, 0, 0);
    }

    pub(in crate::slot) fn mark_body_finished(&mut self) -> bool {
        if self.body_finished {
            return false;
        }
        self.body_finished = true;
        true
    }

    pub(in crate::slot) fn advance_payload_cursor(&mut self) {
        self.payload_cursor += 1;
    }

    pub(in crate::slot) fn advance_node_cursor(&mut self) {
        self.node_cursor += 1;
    }

    pub(in crate::slot) fn skip_to_existing_group_end(
        &mut self,
        group_index: usize,
        subtree_len: usize,
    ) {
        self.next_child_index = group_index + subtree_len;
        self.payload_cursor = self.old_payload_len;
        self.node_cursor = self.old_node_len;
        self.was_skipped = true;
    }
}