Method begin_layout

src/engine.rs:2210–2261

(&mut self)

    }

    pub fn begin_layout(&mut self) {
        self.initialize_ephemeral_memory();
        self.generation += 1;
        if self.released_this_frame_generation != self.generation {
            self.released_this_frame_ids.clear();
        }
        self.dynamic_element_index = 0;

        // Evict stale text measurement cache entries
        self.evict_stale_text_cache();

        let root_width = self.layout_dimensions.width;
        let root_height = self.layout_dimensions.height;

        self.boolean_warnings = BooleanWarnings::default();

        let root_id = hash_string("Ply__RootContainer", 0);
        self.open_element_with_id(&root_id);

        let root_decl = ElementDeclaration {
            layout: LayoutConfig {
                sizing: SizingConfig {
                    width: SizingAxis {
                        type_: SizingType::Fixed,
                        min_max: SizingMinMax {
                            min: root_width,
                            max: root_width,
                        },
                        percent: 0.0,
                        grow_weight: 1.0,
                    },
                    height: SizingAxis {
                        type_: SizingType::Fixed,
                        min_max: SizingMinMax {
                            min: root_height,
                            max: root_height,
                        },
                        percent: 0.0,
                        grow_weight: 1.0,
                    },
                },
                ..Default::default()
            },
            ..Default::default()
        };
        self.configure_open_element(&root_decl);
        self.open_layout_element_stack.push(0);
        self.layout_element_tree_roots.push(LayoutElementTreeRoot {
            layout_element_index: 0,
            ..Default::default()
        });
    }

    pub fn end_layout(&mut self) -> &[InternalRenderCommand<CustomElementData>] {
        self.close_element();