C++ DomNode::to_element方法代码示例

	DomElement DomElement::get_next_sibling_element() const
	{
		DomNode node = get_next_sibling();
		while (!node.is_null() && !node.is_element())
			node = node.get_next_sibling();
		return node.to_element();
	}

	std::string DomNode::select_string(const DomString &xpath_expression) const
	{
		DomNode node = select_node(xpath_expression);
		if (node.is_element())
			return node.to_element().get_text();
		else
			return node.get_node_value();
	}

	DomElement DomDocument::get_document_element()
	{
		DomNode cur = get_first_child();
		while (!cur.is_null())
		{
			if (cur.is_element())
				return cur.to_element();
			cur = cur.get_next_sibling();
		}
		return DomElement();
	}

	std::string DomElement::get_text() const
	{
		std::string str;
		if (has_child_nodes() == false)
			return str;

		DomNode cur = get_first_child();
		while (!cur.is_null())
		{
			if (cur.is_text() || cur.is_cdata_section())
				str.append(cur.get_node_value());
			if (cur.is_element())
				str.append(cur.to_element().get_text());
			cur = cur.get_next_sibling();
		}
		return str;
	}

ProgramObject ProgramObject::load(
    GraphicContext &gc,
    const std::string &resource_id,
    const XMLResourceDocument &resources)
{
    ProgramObject program_object(gc);

    XMLResourceNode resource = resources.get_resource(resource_id);

    DomNode node = resource.get_element().get_first_child();

    while (!node.is_null())
    {
        if (node.is_element())
        {
            DomElement element = node.to_element();
            if (element.get_tag_name() == "shader")
            {
                ShaderObject shader = ShaderObject::load(gc, element.get_attribute("name"), resources);
                program_object.attach(shader);
            }
            else if (element.get_tag_name() == "bind-attribute")
            {
                program_object.bind_attribute_location(
                    StringHelp::text_to_int(element.get_attribute("index")),
                    element.get_attribute("name"));
            }
        }
        node = node.get_next_sibling();
    }

    if (!resource.get_element().get_attribute("shader").empty())
    {
        ShaderObject shader = ShaderObject::load(gc, resource.get_element().get_attribute("shader"), resources);
        program_object.attach(shader);
    }

    if (resource.get_element().get_attribute("link", "true") == "true")
        if(!program_object.link())
            throw Exception(string_format("Unable to link program object: %1", program_object.get_info_log()));

    return program_object;
}

ResourceItem *TexturePacker::load_resource(Canvas &canvas, std::string &resource_id, Resource &resource, ResourceManager &resources)
{
	ResourceItem *item = 0;

	try
	{
		std::string type = resource.get_type();
		if(type == "sprite")
		{
			item = load_sprite(canvas, resource_id, resource, resources);
		}
		else if(type == "image")
		{
			item = load_image(canvas, resource_id, resource, resources);
		}
		else
		{
			throw Exception(string_format("Resourcetype %1 is not supported", type));
		}
	}
	catch(Exception ex)
	{
		item = new NotSupportedResourceItem(resource, ex.message);
	}

	// Find resource path by traversing parents
	DomElement &dom_element = resource.get_element();
	DomNode parent = dom_element.get_parent_node();
	while (!parent.is_null())
	{
		DomElement parent_element = parent.to_element();
		std::string parent_name = parent_element.get_attribute("name");
		if(parent_name.length() > 0)
			item->resource_path = string_format("%1/%2", parent_name, item->resource_path);
		parent = parent.get_parent_node();
	}

	return item;
}

XMLResourceNode XMLResourceDocument::create_resource(const std::string &resource_id, const std::string &type)
{
	if (resource_exists(resource_id))
		throw Exception(string_format("Resource %1 already exists", resource_id));

	std::vector<std::string> path_elements = PathHelp::split_basepath(resource_id);
	std::string name = PathHelp::get_filename(resource_id);

	// Walk tree as deep as we can get:
	DomNode parent = impl->document.get_document_element();
	DomNode cur = parent.get_first_child();
	auto path_it = path_elements.begin();
	while (!cur.is_null() && path_it != path_elements.end())
	{
		if (cur.is_element() &&
			cur.get_namespace_uri() == impl->ns_resources &&
			cur.get_local_name() == "section")
		{
			DomElement element = cur.to_element();
			std::string name = element.get_attribute_ns(impl->ns_resources, "name");
			if (name == *path_it)
			{
				++path_it;
				parent = cur;
				cur = cur.get_first_child();
				continue;
			}
		}
		cur = cur.get_next_sibling();
	}

	// Create any missing parent nodes:
	std::string prefix = parent.get_prefix();
	while (path_it != path_elements.end())
	{
		DomElement section;
		if (prefix.empty())
		{
			section = impl->document.create_element_ns( impl->ns_resources, (*path_it) );
		}
		else
		{
			section = impl->document.create_element_ns( impl->ns_resources,(prefix + ":" + *path_it));
		}
		parent.append_child(section);
		parent = section;
		++path_it;
	}

	// Create node:
	DomElement resource_node;
	if (prefix.empty())
	{
		resource_node = impl->document.create_element_ns( impl->ns_resources, (type));
	}
	else
	{
		resource_node = impl->document.create_element_ns( impl->ns_resources,(prefix + ":" + type));
	}

	resource_node.set_attribute_ns(
		impl->ns_resources,
		prefix.empty() ? "name" : (prefix + ":name"),
		name);
	parent.append_child(resource_node);

	// Create resource:
	impl->resources[resource_id] = XMLResourceNode(resource_node, *this);
	return impl->resources[resource_id];
}