craft_core 0.1.1

Core library for the Craft GUI framework.
Documentation 
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use crate::elements::element::Element;
use crate::elements::{Font, Image, TinyVg};
use crate::reactive::fiber_node::FiberNode;
use crate::reactive::tree::ComponentTreeNode;
use crate::resource_manager::resource_type::ResourceType;
use crate::resource_manager::{ResourceIdentifier, ResourceManager};
use std::collections::HashMap;
use std::sync::Arc;

/// Introspect the view.
///
// Scans through the component tree and diffs it for resources that need to be updated.
pub async fn scan_view_for_resources(
    element: &dyn Element,
    component: &ComponentTreeNode,
    resource_manager: Arc<ResourceManager>,
    resources_collected: &mut HashMap<ResourceIdentifier, bool>
) {
    let fiber: FiberNode = FiberNode {
        element: Some(element),
        component: Some(component),
    };

    for fiber_node in fiber.level_order_iter().collect::<Vec<FiberNode>>().iter().rev() {
        if let Some(element) = fiber_node.element {
            let image_resource =
                element.as_any().downcast_ref::<Image>().map(|image| image.resource_identifier.clone());

            let font_resource = element.as_any().downcast_ref::<Font>().map(|font| font.resource_identifier.clone());
            let tinyvg_resource = element.as_any().downcast_ref::<TinyVg>().map(|tinyvg| tinyvg.resource_identifier.clone());

            if image_resource.is_some() || font_resource.is_some() || tinyvg_resource.is_some() {

                if let Some(image_resource) = image_resource {
                    resource_manager.async_download_resource_and_send_message_on_finish(
                        image_resource.clone(),
                        ResourceType::Image,
                        resources_collected
                    );
                    resources_collected.insert(image_resource.clone(), true);
                }

                if let Some(font_resource) = font_resource {
                    resource_manager
                        .async_download_resource_and_send_message_on_finish(font_resource.clone(), ResourceType::Font, resources_collected);
                    resources_collected.insert(font_resource.clone(), true);
                }
                
                if let Some(tinyvg_resource) = tinyvg_resource {
                    resource_manager
                        .async_download_resource_and_send_message_on_finish(tinyvg_resource.clone(), ResourceType::TinyVg, resources_collected);
                    resources_collected.insert(tinyvg_resource.clone(), true);
                }
                
            }
        }
    }
}