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use bevy::{
prelude::{Assets, Commands, Entity, Query, Res, ResMut, With},
utils::HashMap,
};
use kayak_font::KayakFont;
use crate::{
layout::{DataCache, Rect},
node::{DirtyNode, Node, NodeBuilder, WrappedIndex},
prelude::{Context, KStyle},
render::font::FontMapping,
render_primitive::RenderPrimitive,
styles::{StyleProp, Units},
};
pub fn calculate_nodes(
mut commands: Commands,
mut context: ResMut<Context>,
fonts: Res<Assets<KayakFont>>,
font_mapping: Res<FontMapping>,
query: Query<Entity, With<DirtyNode>>,
all_styles_query: Query<&KStyle>,
node_query: Query<(Entity, &Node)>,
nodes_no_entity_query: Query<&'static Node>,
) {
let mut new_nodes = HashMap::<Entity, (Node, bool)>::default();
// This is the maximum recursion depth for this method.
// Recursion involves recalculating layout which should be done sparingly.
// const MAX_RECURSION_DEPTH: usize = 2;
context.current_z = 0.0;
let initial_styles = KStyle::initial();
let default_styles = KStyle::new_default();
// Jump out early.
// if query.is_empty() {
// return;
// }
if let Ok(tree) = context.tree.clone().read() {
for dirty_entity in query.iter() {
let dirty_entity = WrappedIndex(dirty_entity);
let styles = all_styles_query
.get(dirty_entity.0)
.unwrap_or(&default_styles);
// Get the parent styles. Will be one of the following:
// 1. Already-resolved node styles (best)
// 2. Unresolved widget prop styles
// 3. Unresolved default styles
let parent_styles = if let Some(parent_widget_id) = tree.parents.get(&dirty_entity) {
if let Ok((_, parent_node)) = node_query.get(parent_widget_id.0) {
parent_node.resolved_styles.clone()
} else if let Some(parent_node) = new_nodes.get(&parent_widget_id.0) {
parent_node.0.resolved_styles.clone()
} else if let Ok(parent_styles) = all_styles_query.get(parent_widget_id.0) {
parent_styles.clone()
} else {
default_styles.clone()
}
} else {
default_styles.clone()
};
let parent_z = if let Some(parent_widget_id) = tree.parents.get(&dirty_entity) {
if let Ok((_, parent_node)) = node_query.get(parent_widget_id.0) {
parent_node.z
} else if let Some(parent_node) = new_nodes.get(&parent_widget_id.0) {
parent_node.0.z
} else {
-1.0
}
} else {
-1.0
};
let current_z = {
if parent_z > -1.0 {
parent_z + 1.0
} else {
let z = context.current_z;
context.current_z += 1.0;
z
}
};
let raw_styles = styles.clone();
let mut styles = raw_styles.clone();
// Fill in all `initial` values for any unset property
styles.apply(&initial_styles);
// Fill in all `inherited` values for any `inherit` property
styles.inherit(&parent_styles);
let (primitive, needs_layout) = create_primitive(
&mut commands,
&context,
&fonts,
&font_mapping,
// &node_query,
dirty_entity,
&mut styles,
);
let children = tree.children.get(&dirty_entity).cloned().unwrap_or(vec![]);
let width = styles.width.resolve().value_or(0.0, 0.0);
let height = styles.height.resolve().value_or(0.0, 0.0);
let mut node = NodeBuilder::empty()
.with_id(dirty_entity)
.with_styles(styles, Some(raw_styles))
.with_children(children)
.with_primitive(primitive)
.build();
if dirty_entity == tree.root_node.unwrap() {
if let Ok(mut cache) = context.layout_cache.try_write() {
cache.rect.insert(
dirty_entity,
Rect {
posx: 0.0,
posy: 0.0,
width,
height,
z_index: 0.0,
},
);
}
}
node.z = current_z;
new_nodes.insert(dirty_entity.0, (node, needs_layout));
}
// let has_new_nodes = new_nodes.len() > 0;
for (entity, (node, needs_layout)) in new_nodes.drain() {
commands.entity(entity).insert(node);
if !needs_layout {
commands.entity(entity).remove::<DirtyNode>();
log::trace!("{:?} needs layout!", entity.id());
}
}
{
let context = context.as_mut();
if let Ok(tree) = context.tree.try_read() {
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let node_tree = &*tree;
if let Ok(mut cache) = context.layout_cache.try_write() {
let mut data_cache = DataCache {
cache: &mut cache,
query: &nodes_no_entity_query,
};
morphorm::layout(&mut data_cache, node_tree, &nodes_no_entity_query);
}
}
}
}
}
fn create_primitive(
commands: &mut Commands,
context: &Context,
fonts: &Assets<KayakFont>,
font_mapping: &FontMapping,
// query: &Query<(Entity, &Node)>,
id: WrappedIndex,
styles: &mut KStyle,
) -> (RenderPrimitive, bool) {
let mut render_primitive = RenderPrimitive::from(&styles.clone());
let mut needs_layout = false;
match &mut render_primitive {
RenderPrimitive::Text {
content,
font,
properties,
text_layout,
..
} => {
// --- Bind to Font Asset --- //
let font_handle = font_mapping.get_handle(font.clone()).unwrap();
if let Some(font) = fonts.get(&font_handle) {
// self.bind(id, &asset);
if let Ok(node_tree) = context.tree.try_read() {
if let Some(parent_id) = node_tree.get_parent(id) {
if let Some(parent_layout) = context.get_layout(&parent_id) {
properties.max_size = (parent_layout.width, parent_layout.height);
if properties.max_size.0 == 0.0 || properties.max_size.1 == 0.0 {
needs_layout = true;
}
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// --- Calculate Text Layout --- //
*text_layout = font.measure(&content, *properties);
let measurement = text_layout.size();
// --- Apply Layout --- //
if matches!(styles.width, StyleProp::Default) {
styles.width = StyleProp::Value(Units::Pixels(measurement.0));
}
if matches!(styles.height, StyleProp::Default) {
styles.height = StyleProp::Value(Units::Pixels(measurement.1));
}
} else {
needs_layout = true;
}
} else {
needs_layout = true;
}
} else {
needs_layout = true;
}
} else {
needs_layout = true;
}
}
_ => {}
}
if needs_layout {
commands.entity(id.0).insert(DirtyNode);
}
(render_primitive, needs_layout)
}
// pub fn build_nodes_tree(context: &mut Context, tree: &Tree, node_query: &Query<(Entity, &Node)>) {
// if tree.root_node.is_none() {
// return;
// }
// let mut node_tree = Tree::default();
// node_tree.root_node = tree.root_node;
// node_tree.children.insert(
// tree.root_node.unwrap(),
// get_valid_node_children(&tree, &node_query, tree.root_node.unwrap()),
// );
// // let old_focus = self.focus_tree.current();
// // self.focus_tree.clear();
// // self.focus_tree.add(root_node_id, &self.tree);
// for (node_id, node) in node_query.iter() {
// let node_id = WrappedIndex(node_id);
// if let Some(widget_styles) = node.raw_styles.as_ref() {
// // Only add widgets who have renderable nodes.
// // if widget_styles.render_command.resolve() != RenderCommand::Empty {
// let valid_children = get_valid_node_children(&tree, &node_query, node_id);
// node_tree.children.insert(node_id, valid_children);
// let valid_parent = get_valid_parent(&tree, &node_query, node_id);
// if let Some(valid_parent) = valid_parent {
// node_tree.parents.insert(node_id, valid_parent);
// }
// // }
// }
// // let focusable = self.get_focusable(widget_id).unwrap_or_default();
// // if focusable {
// // self.focus_tree.add(widget_id, &self.tree);
// // }
// }
// // if let Some(old_focus) = old_focus {
// // if self.focus_tree.contains(old_focus) {
// // self.focus_tree.focus(old_focus);
// // }
// // }
// // dbg!(&node_tree);
// // context.node_tree = node_tree;
// }
// pub fn get_valid_node_children(
// tree: &Tree,
// query: &Query<(Entity, &Node)>,
// node_id: WrappedIndex,
// ) -> Vec<WrappedIndex> {
// let mut children = Vec::new();
// if let Some(node_children) = tree.children.get(&node_id) {
// for child_id in node_children {
// if let Ok((_, _child_node)) = query.get(child_id.0) {
// // if child_node.resolved_styles.render_command.resolve() != RenderCommand::Empty {
// children.push(*child_id);
// // } else {
// // children.extend(get_valid_node_children(tree, query, *child_id));
// // }
// } else {
// // children.extend(get_valid_node_children(tree, query, *child_id));
// }
// }
// }
// children
// }
// pub fn get_valid_parent(
// tree: &Tree,
// query: &Query<(Entity, &Node)>,
// node_id: WrappedIndex,
// ) -> Option<WrappedIndex> {
// if let Some(parent_id) = tree.parents.get(&node_id) {
// if let Ok((_, parent_node)) = query.get(parent_id.0) {
// // if parent_node.resolved_styles.render_command.resolve() != RenderCommand::Empty {
// return Some(*parent_id);
// // }
// }
// // return get_valid_parent(tree, query, *parent_id);
// }
// None
// }