Revert of Generate separate files for union type containers

third_party/WebKit/Source/bindings/templates/union.cpp

+{% from 'utilities.cpp' import declare_enum_validation_variable %}
+{% include 'copyright_block.txt' %}
+#include "{{header_filename}}"
+
+{% from 'utilities.cpp' import v8_value_to_local_cpp_value %}
+{% macro assign_and_return_if_hasinstance(member) %}
+if (V8{{member.type_name}}::hasInstance(v8Value, isolate)) {
+    {{member.cpp_local_type}} cppValue = V8{{member.type_name}}::toImpl(v8::Local<v8::Object>::Cast(v8Value));
+    impl.set{{member.type_name}}(cppValue);
+    return;
+}
+{% endmacro %}
+{% for filename in cpp_includes %}
+#include "{{filename}}"
+{% endfor %}
+
+namespace blink {
+
+{% for container in containers %}
+{{container.cpp_class}}::{{container.cpp_class}}()
+    : m_type(SpecificTypeNone)
+{
+}
+
+{% for member in container.members %}
+{{member.rvalue_cpp_type}} {{container.cpp_class}}::getAs{{member.type_name}}() const
+{
+    ASSERT(is{{member.type_name}}());
+    return m_{{member.cpp_name}};
+}
+
+void {{container.cpp_class}}::set{{member.type_name}}({{member.rvalue_cpp_type}} value)
+{
+    ASSERT(isNull());
+    {% if member.enum_values %}
+    NonThrowableExceptionState exceptionState;
+    {{declare_enum_validation_variable(member.enum_values) | indent}}
+    if (!isValidEnum(value, validValues, WTF_ARRAY_LENGTH(validValues), "{{member.type_name}}", exceptionState)) {
+        ASSERT_NOT_REACHED();
+        return;
+    }
+    {% endif %}
+    m_{{member.cpp_name}} = value;
+    m_type = {{member.specific_type_enum}};
+}
+
+{{container.cpp_class}} {{container.cpp_class}}::from{{member.type_name}}({{member.rvalue_cpp_type}} value)
+{
+    {{container.cpp_class}} container;
+    container.set{{member.type_name}}(value);
+    return container;
+}
+
+{% endfor %}
+{{container.cpp_class}}::{{container.cpp_class}}(const {{container.cpp_class}}&) = default;
+{{container.cpp_class}}::~{{container.cpp_class}}() = default;
+{{container.cpp_class}}& {{container.cpp_class}}::operator=(const {{container.cpp_class}}&) = default;
+
+DEFINE_TRACE({{container.cpp_class}})
+{
+    {% for member in container.members if member.is_traceable %}
+    visitor->trace(m_{{member.cpp_name}});
+    {% endfor %}
+}
+
+void V8{{container.cpp_class}}::toImpl(v8::Isolate* isolate, v8::Local<v8::Value> v8Value, {{container.cpp_class}}& impl, UnionTypeConversionMode conversionMode, ExceptionState& exceptionState)
+{
+    if (v8Value.IsEmpty())
+        return;
+
+    {# The numbers in the following comments refer to the steps described in
+       http://heycam.github.io/webidl/#es-union #}
+    {# 1. null or undefined #}
+    if (conversionMode == UnionTypeConversionMode::Nullable && isUndefinedOrNull(v8Value))
+        return;
+
+    {# 3. Platform objects (interfaces) #}
+    {% for interface in container.interface_types %}
+    {{assign_and_return_if_hasinstance(interface) | indent}}
+
+    {% endfor %}
+    {# 8. ArrayBuffer #}
+    {% if container.array_buffer_type %}
+    {{assign_and_return_if_hasinstance(container.array_buffer_type) | indent}}
+
+    {% endif %}
+    {# 9., 10. ArrayBufferView #}
+    {# FIXME: Individual typed arrays (e.g. Uint8Array) aren't supported yet. #}
+    {% if container.array_buffer_view_type %}
+    {{assign_and_return_if_hasinstance(container.array_buffer_view_type) | indent}}
+
+    {% endif %}
+    {% if container.dictionary_type %}
+    {# 12. Dictionaries #}
+    {# FIXME: This should also check "object but not Date or RegExp". Add checks
+       when we implement conversions for Date and RegExp. #}
+    if (isUndefinedOrNull(v8Value) || v8Value->IsObject()) {
+        {{v8_value_to_local_cpp_value(container.dictionary_type) | indent(8)}}
+        impl.set{{container.dictionary_type.type_name}}(cppValue);
+        return;
+    }
+
+    {% endif %}
+    {% if container.array_or_sequence_type %}
+    {# 13.1, 13.2. Arrays and Sequences #}
+    {# FIXME: This should also check "object but not Date or RegExp". Add checks
+       when we implement conversions for Date and RegExp. #}
+    {# FIXME: Should check for sequences too, not just Array instances. #}
+    if (v8Value->IsArray()) {
+        {{v8_value_to_local_cpp_value(container.array_or_sequence_type) | indent(8)}}
+        impl.set{{container.array_or_sequence_type.type_name}}(cppValue);
+        return;
+    }
+
+    {% endif %}
+    {# TODO(bashi): Support 13.3 Callback interface when we need it #}
+    {# 13.4. Objects #}
+    {% if container.object_type %}
+    if (isUndefinedOrNull(v8Value) || v8Value->IsObject()) {
+        {{v8_value_to_local_cpp_value(container.object_type) | indent(8)}}
+        impl.set{{container.object_type.type_name}}(cppValue);
+        return;
+    }
+
+    {% endif %}
+    {# FIXME: In some cases, we can omit boolean and numeric type checks because
+       we have fallback conversions. (step 17 and 18) #}
+    {% if container.boolean_type %}
+    {# 14. Boolean #}
+    if (v8Value->IsBoolean()) {
+        impl.setBoolean(v8Value.As<v8::Boolean>()->Value());
+        return;
+    }
+
+    {% endif %}
+    {% if container.numeric_type %}
+    {# 15. Number #}
+    if (v8Value->IsNumber()) {
+        {{v8_value_to_local_cpp_value(container.numeric_type) | indent(8)}}
+        impl.set{{container.numeric_type.type_name}}(cppValue);
+        return;
+    }
+
+    {% endif %}
+    {% if container.string_type %}
+    {# 16. String #}
+    {
+        {{v8_value_to_local_cpp_value(container.string_type) | indent(8)}}
+        {% if container.string_type.enum_values %}
+        {{declare_enum_validation_variable(container.string_type.enum_values) | indent(8)}}
+        if (!isValidEnum(cppValue, validValues, WTF_ARRAY_LENGTH(validValues), "{{container.string_type.type_name}}", exceptionState))
+            return;
+        {% endif %}
+        impl.set{{container.string_type.type_name}}(cppValue);
+        return;
+    }
+
+    {# 17. Number (fallback) #}
+    {% elif container.numeric_type %}
+    {
+        {{v8_value_to_local_cpp_value(container.numeric_type) | indent(8)}}
+        impl.set{{container.numeric_type.type_name}}(cppValue);
+        return;
+    }
+
+    {# 18. Boolean (fallback) #}
+    {% elif container.boolean_type %}
+    {
+        impl.setBoolean(v8Value->BooleanValue());
+        return;
+    }
+
+    {% else %}
+    {# 19. TypeError #}
+    exceptionState.throwTypeError("The provided value is not of type '{{container.type_string}}'");
+    {% endif %}
+}
+
+v8::Local<v8::Value> toV8(const {{container.cpp_class}}& impl, v8::Local<v8::Object> creationContext, v8::Isolate* isolate)
+{
+    switch (impl.m_type) {
+    case {{container.cpp_class}}::SpecificTypeNone:
+        {# FIXME: We might want to return undefined in some cases #}
+        return v8::Null(isolate);
+    {% for member in container.members %}
+    case {{container.cpp_class}}::{{member.specific_type_enum}}:
+        return {{member.cpp_value_to_v8_value}};
+    {% endfor %}
+    default:
+        ASSERT_NOT_REACHED();
+    }
+    return v8::Local<v8::Value>();
+}
+
+{{container.cpp_class}} NativeValueTraits<{{container.cpp_class}}>::nativeValue(v8::Isolate* isolate, v8::Local<v8::Value> value, ExceptionState& exceptionState)
+{
+    {{container.cpp_class}} impl;
+    V8{{container.cpp_class}}::toImpl(isolate, value, impl, UnionTypeConversionMode::NotNullable, exceptionState);
+    return impl;
+}
+
+{% endfor %}
+} // namespace blink