flutter_flutter/sky/engine/bindings/scripts/templates/attributes_cpp.template

{##############################################################################}
{% macro attribute_getter(cpp_class, attribute) %}
static void {{static_attribute_name(attribute, 'Getter')}}(Dart_NativeArguments args) {
{% if attribute.is_getter_raises_exception or attribute.is_call_with_execution_context %}
    Dart_Handle exception = nullptr;
{% endif %}
  {
{% if attribute.is_call_with_execution_context %}
    ExecutionContext* context = DOMDartState::CurrentDocument();
    if (!context) {
      exception = ToDart("Failed to retrieve a context");
      goto fail;
    }
{% endif %}
{% if attribute.is_call_with_script_state %}
    DartState* dart_state = DartState::Current();
    DCHECK(state);
{% endif %}
{% if attribute.dart_set_return_value and not attribute.is_static %}
    {{cpp_class}}* receiver = GetReceiver<{{cpp_class}}>(args);
{% else %}
    // FIXME: Need receiver setup too.
{% endif %}
{% if attribute.reflect_only %}
    {{generate_reflects(attribute)|indent(4)}}
{% endif %}
    {{callback_return(attribute)|indent(4)}}
    return;
  }
{% if attribute.is_getter_raises_exception or attribute.is_call_with_execution_context %}
fail:
    Dart_ThrowException(exception);
    ASSERT_NOT_REACHED();
{% endif %}
}
{% endmacro %}


{##############################################################################}
{% macro callback_return(attribute) %}
{% if attribute.dart_set_return_value %}
  {% if attribute.is_nullable %}
bool is_null = false;
  {% endif %}
  {% if attribute.is_getter_raises_exception or
        attribute.is_nullable %}
ExceptionState es;
  {% endif %}
  {% if attribute.cached_attribute_validation_method or
        attribute.is_getter_raises_exception or
        attribute.is_nullable %}
{{attribute.cpp_type}} {{attribute.cpp_value}} = {{attribute.cpp_value_original}};
  {% endif %}
  {% if attribute.is_nullable %}
if (is_null)
    return;
  {% endif %}
  {% if attribute.is_getter_raises_exception %}
if (es.had_exception()) {
    exception = es.GetDartException(args, {{attribute.auto_scope}});
    goto fail;
}
  {% endif %}
{{attribute.dart_set_return_value}};
{% else %}
// FIXME: Need to convert this properly.
DART_UNIMPLEMENTED();
{% endif %}
{% endmacro %}


{##############################################################################}
{% macro attribute_setter(cpp_class, attribute) %}
static void {{static_attribute_name(attribute, 'Setter')}}(Dart_NativeArguments args)
{
{% if not attribute.cpp_setter %}
{# TODO(terry): Need to fix properly. #}
    // FIXME: proper implementation.
    DART_UNIMPLEMENTED();
{% else %}
    Dart_Handle exception = nullptr;
    {
        {{cpp_class}}* receiver = GetReceiver<{{cpp_class}}>(args);
{% set attribute_name = attribute.name if not attribute.put_forwards else 'value' %}

        {{attribute.local_cpp_type}} {{attribute.setter_lvalue}} = {{attribute.dart_value_to_local_cpp_value}};
        if (exception)
            goto fail;
{% if attribute.is_call_with_execution_context or
      attribute.is_setter_call_with_execution_context %}

        ExecutionContext* context = DOMDartState::CurrentDocument();
        if (!context) {
            exception = ToDart("Failed to retrieve a context");
            goto fail;
        }

{% endif %}

{% if attribute.is_call_with_script_state %}
        ScriptState* state = DartUtilities::currentScriptState();
        if (!state) {
            exception = ToDart("Failed to retrieve a script state");
            goto fail;
        }
{% endif %}
{% if attribute.is_setter_raises_exception %}
        ExceptionState es;
{% endif %}
        {{attribute.cpp_setter}};
{% if attribute.is_setter_raises_exception %}
        if (es.had_exception()) {
            exception = es.GetDartException(args, {{attribute.auto_scope}});
            goto fail;
        }
{% endif %}
        return;
    }

fail:
    Dart_ThrowException(exception);
    ASSERT_NOT_REACHED();
{% endif %}
}
{% endmacro %}


{######################################}
{% macro generate_reflects(attribute) %}
{% set reflect_only_values = attribute.reflect_only %}
{% set reflect_missing = attribute.reflect_missing %}
{% set reflect_invalid = attribute.reflect_invalid %}
{% set reflect_empty = attribute.reflect_empty %}
{{attribute.cpp_type}} result = {{attribute.cpp_value_original}};

{# Attribute is limited to only known values: check that the attribute value is
   one of those. If not, set it to the empty string.
   http://www.whatwg.org/specs/web-apps/current-work/#limited-to-only-known-values #}
{% if reflect_empty %}
if (result.isNull()) {
{% if reflect_missing %}
    result = "{{reflect_missing}}";
{% else %}
    ;
{% endif %}
} else if (result.isEmpty()) {
    result = "{{reflect_empty}}";
{% else %}
if (result.isEmpty()) {
{% if reflect_missing %}
    result = "{{reflect_missing}}";
{% else %}
    ;
{% endif %}
{% endif %}
{% for value in reflect_only_values %}
} else if (equalIgnoringCase(result, "{{value}}")) {
    result = "{{value}}";
{% endfor %}
} else {
    result = "{{reflect_invalid}}";
}

{% endmacro %}


{##############################################################################}
{% macro static_attribute_name(attribute, setter_or_getter) -%}
{{attribute.name}}{{setter_or_getter}}
{%- endmacro -%}


{##############################################################################}
{% macro generate_attribute_resolver_body(dart_class, class_name, attribute) %}
if (argumentCount == 1 && name == "{{attribute.native_entry_getter.resolver_string}}") {
    *autoSetupScope = {{attribute.auto_scope}};
    return {{dart_class}}Internal::{{static_attribute_name(attribute, 'Getter')}};
}
{# FIXME Disabling PutForwards for now #}
{#  {% if not attribute.is_read_only or attribute.put_forwards %} #}
  {% if not attribute.is_read_only %}
if (argumentCount == 2 && name == "{{attribute.native_entry_setter.resolver_string}}") {
    *autoSetupScope = {{attribute.auto_scope}};
    return {{dart_class}}Internal::{{static_attribute_name(attribute, 'Setter')}};
}
  {% endif %}
{% endmacro %}

{##############################################################################}
{% macro generate_attribute_symbolizer_body(dart_class, class_name, attribute) %}
if (native_function == {{dart_class}}Internal::{{static_attribute_name(attribute, 'Getter')}}) {
    return reinterpret_cast<const uint8_t*>("{{attribute.native_entry_getter.resolver_string}}");
}
  {% if not attribute.is_read_only %}
if (native_function == {{dart_class}}Internal::{{static_attribute_name(attribute, 'Setter')}}) {
    return reinterpret_cast<const uint8_t*>("{{attribute.native_entry_setter.resolver_string}}");
}
  {% endif %}
{% endmacro %}