ladybird/Userland/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp
Linus Groh 8c7d1986b8 LibWeb: Actually construct impl and wrapper in construct() :^)
FooConstructor::construct() is no longer a dummy but now generates
either code to throw an exception (for interfaces without constructor)
or code to construct the wrapper and its impl object.

Constructor overloads are not currenly handled, but that's not something
we need right now anyway. Instead of  regular create() this uses a new
static function create_with_global_object() and passes the WindowObject,
which may be needed - e.g. for XMLHttpRequest, which has an IDL and
JavaScript constructor with no arguments, but needs a DOM::Window in its
create().
2021-02-17 23:45:07 +01:00

1439 lines
48 KiB
C++

/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Linus Groh <mail@linusgroh.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/ByteBuffer.h>
#include <AK/Debug.h>
#include <AK/GenericLexer.h>
#include <AK/HashMap.h>
#include <AK/LexicalPath.h>
#include <AK/SourceGenerator.h>
#include <AK/StringBuilder.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <ctype.h>
static String snake_name(const StringView& title_name)
{
StringBuilder builder;
bool first = true;
bool last_was_uppercase = false;
for (auto ch : title_name) {
if (isupper(ch)) {
if (!first && !last_was_uppercase)
builder.append('_');
builder.append(tolower(ch));
} else {
builder.append(ch);
}
first = false;
last_was_uppercase = isupper(ch);
}
return builder.to_string();
}
static String make_input_acceptable_cpp(const String& input)
{
if (input.is_one_of("class", "template", "for", "default", "char", "namespace")) {
StringBuilder builder;
builder.append(input);
builder.append('_');
return builder.to_string();
}
String input_without_dashes = input;
input_without_dashes.replace("-", "_");
return input_without_dashes;
}
static void report_parsing_error(StringView message, StringView filename, StringView input, size_t offset)
{
// FIXME: Spaghetti code ahead.
size_t lineno = 1;
size_t colno = 1;
size_t start_line = 0;
size_t line_length = 0;
for (size_t index = 0; index < input.length(); ++index) {
if (offset == index)
colno = index - start_line + 1;
if (input[index] == '\n') {
if (index >= offset)
break;
start_line = index + 1;
line_length = 0;
++lineno;
} else {
++line_length;
}
}
StringBuilder error_message;
error_message.appendff("{}\n", input.substring_view(start_line, line_length));
for (size_t i = 0; i < colno - 1; ++i)
error_message.append(' ');
error_message.append("\033[1;31m^\n");
error_message.appendff("{}:{}: error: {}\033[0m\n", filename, lineno, message);
warnln("{}", error_message.string_view());
exit(EXIT_FAILURE);
}
namespace IDL {
template<typename FunctionType>
static size_t get_function_length(FunctionType& function)
{
size_t length = 0;
for (auto& parameter : function.parameters) {
if (!parameter.optional)
length++;
}
return length;
}
struct Type {
String name;
bool nullable { false };
};
struct Parameter {
Type type;
String name;
bool optional { false };
};
struct Function {
Type return_type;
String name;
Vector<Parameter> parameters;
HashMap<String, String> extended_attributes;
size_t length() const { return get_function_length(*this); }
};
struct Constructor {
String name;
Vector<Parameter> parameters;
size_t length() const { return get_function_length(*this); }
};
struct Constant {
Type type;
String name;
String value;
};
struct Attribute {
bool readonly { false };
Type type;
String name;
HashMap<String, String> extended_attributes;
// Added for convenience after parsing
String getter_callback_name;
String setter_callback_name;
};
struct Interface {
String name;
String parent_name;
Vector<Attribute> attributes;
Vector<Constant> constants;
Vector<Constructor> constructors;
Vector<Function> functions;
// Added for convenience after parsing
String wrapper_class;
String wrapper_base_class;
String fully_qualified_name;
String constructor_class;
String prototype_class;
String prototype_base_class;
};
static OwnPtr<Interface> parse_interface(StringView filename, const StringView& input)
{
auto interface = make<Interface>();
GenericLexer lexer(input);
auto assert_specific = [&](char ch) {
if (!lexer.consume_specific(ch))
report_parsing_error(String::formatted("expected '{}'", ch), filename, input, lexer.tell());
};
auto consume_whitespace = [&] {
bool consumed = true;
while (consumed) {
consumed = lexer.consume_while([](char ch) { return isspace(ch); }).length() > 0;
if (lexer.consume_specific("//")) {
lexer.consume_until('\n');
consumed = true;
}
}
};
auto assert_string = [&](const StringView& expected) {
if (!lexer.consume_specific(expected))
report_parsing_error(String::formatted("expected '{}'", expected), filename, input, lexer.tell());
};
assert_string("interface");
consume_whitespace();
interface->name = lexer.consume_until([](auto ch) { return isspace(ch); });
consume_whitespace();
if (lexer.consume_specific(':')) {
consume_whitespace();
interface->parent_name = lexer.consume_until([](auto ch) { return isspace(ch); });
consume_whitespace();
}
assert_specific('{');
auto parse_type = [&] {
bool unsigned_ = lexer.consume_specific("unsigned");
if (unsigned_)
consume_whitespace();
auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == '?'; });
auto nullable = lexer.consume_specific('?');
StringBuilder builder;
if (unsigned_)
builder.append("unsigned ");
builder.append(name);
return Type { builder.to_string(), nullable };
};
auto parse_attribute = [&](HashMap<String, String>& extended_attributes) {
bool readonly = lexer.consume_specific("readonly");
if (readonly)
consume_whitespace();
if (lexer.consume_specific("attribute"))
consume_whitespace();
auto type = parse_type();
consume_whitespace();
auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == ';'; });
consume_whitespace();
assert_specific(';');
Attribute attribute;
attribute.readonly = readonly;
attribute.type = type;
attribute.name = name;
attribute.getter_callback_name = String::formatted("{}_getter", snake_name(attribute.name));
attribute.setter_callback_name = String::formatted("{}_setter", snake_name(attribute.name));
attribute.extended_attributes = move(extended_attributes);
interface->attributes.append(move(attribute));
};
auto parse_constant = [&] {
lexer.consume_specific("const");
consume_whitespace();
Constant constant;
constant.type = parse_type();
consume_whitespace();
constant.name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == '='; });
consume_whitespace();
lexer.consume_specific('=');
consume_whitespace();
constant.value = lexer.consume_while([](auto ch) { return !isspace(ch) && ch != ';'; });
consume_whitespace();
assert_specific(';');
interface->constants.append(move(constant));
};
auto parse_parameters = [&] {
consume_whitespace();
Vector<Parameter> parameters;
for (;;) {
if (lexer.next_is(')'))
break;
bool optional = lexer.consume_specific("optional");
if (optional)
consume_whitespace();
auto type = parse_type();
consume_whitespace();
auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == ',' || ch == ')'; });
parameters.append({ move(type), move(name), optional });
if (lexer.next_is(')'))
break;
assert_specific(',');
consume_whitespace();
}
return parameters;
};
auto parse_function = [&](HashMap<String, String>& extended_attributes) {
auto return_type = parse_type();
consume_whitespace();
auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == '('; });
consume_whitespace();
assert_specific('(');
auto parameters = parse_parameters();
assert_specific(')');
consume_whitespace();
assert_specific(';');
interface->functions.append(Function { return_type, name, move(parameters), move(extended_attributes) });
};
auto parse_constructor = [&] {
assert_string("constructor");
consume_whitespace();
assert_specific('(');
auto parameters = parse_parameters();
assert_specific(')');
consume_whitespace();
assert_specific(';');
interface->constructors.append(Constructor { interface->name, move(parameters) });
};
auto parse_extended_attributes = [&] {
HashMap<String, String> extended_attributes;
for (;;) {
consume_whitespace();
if (lexer.consume_specific(']'))
break;
auto name = lexer.consume_until([](auto ch) { return ch == ']' || ch == '=' || ch == ','; });
if (lexer.consume_specific('=')) {
auto value = lexer.consume_until([](auto ch) { return ch == ']' || ch == ','; });
extended_attributes.set(name, value);
} else {
extended_attributes.set(name, {});
}
lexer.consume_specific(',');
}
consume_whitespace();
return extended_attributes;
};
for (;;) {
HashMap<String, String> extended_attributes;
consume_whitespace();
if (lexer.consume_specific('}')) {
consume_whitespace();
assert_specific(';');
break;
}
if (lexer.consume_specific('[')) {
extended_attributes = parse_extended_attributes();
}
if (lexer.next_is("constructor")) {
parse_constructor();
continue;
}
if (lexer.next_is("const")) {
parse_constant();
continue;
}
if (lexer.next_is("readonly") || lexer.next_is("attribute")) {
parse_attribute(extended_attributes);
continue;
}
parse_function(extended_attributes);
}
interface->wrapper_class = String::formatted("{}Wrapper", interface->name);
interface->wrapper_base_class = String::formatted("{}Wrapper", interface->parent_name.is_empty() ? String::empty() : interface->parent_name);
interface->constructor_class = String::formatted("{}Constructor", interface->name);
interface->prototype_class = String::formatted("{}Prototype", interface->name);
interface->prototype_base_class = String::formatted("{}Prototype", interface->parent_name.is_empty() ? "Object" : interface->parent_name);
return interface;
}
}
static void generate_constructor_header(const IDL::Interface&);
static void generate_constructor_implementation(const IDL::Interface&);
static void generate_prototype_header(const IDL::Interface&);
static void generate_prototype_implementation(const IDL::Interface&);
static void generate_header(const IDL::Interface&);
static void generate_implementation(const IDL::Interface&);
int main(int argc, char** argv)
{
Core::ArgsParser args_parser;
const char* path = nullptr;
bool header_mode = false;
bool implementation_mode = false;
bool constructor_header_mode = false;
bool constructor_implementation_mode = false;
bool prototype_header_mode = false;
bool prototype_implementation_mode = false;
args_parser.add_option(header_mode, "Generate the wrapper .h file", "header", 'H');
args_parser.add_option(implementation_mode, "Generate the wrapper .cpp file", "implementation", 'I');
args_parser.add_option(constructor_header_mode, "Generate the constructor .h file", "constructor-header", 'C');
args_parser.add_option(constructor_implementation_mode, "Generate the constructor .cpp file", "constructor-implementation", 'O');
args_parser.add_option(prototype_header_mode, "Generate the prototype .h file", "prototype-header", 'P');
args_parser.add_option(prototype_implementation_mode, "Generate the prototype .cpp file", "prototype-implementation", 'R');
args_parser.add_positional_argument(path, "IDL file", "idl-file");
args_parser.parse(argc, argv);
auto file_or_error = Core::File::open(path, Core::IODevice::ReadOnly);
if (file_or_error.is_error()) {
fprintf(stderr, "Cannot open %s\n", path);
return 1;
}
LexicalPath lexical_path(path);
auto namespace_ = lexical_path.parts().at(lexical_path.parts().size() - 2);
auto data = file_or_error.value()->read_all();
auto interface = IDL::parse_interface(path, data);
if (!interface) {
warnln("Cannot parse {}", path);
return 1;
}
if (namespace_.is_one_of("DOM", "HTML", "UIEvents", "HighResolutionTime", "NavigationTiming", "SVG", "XHR")) {
StringBuilder builder;
builder.append(namespace_);
builder.append("::");
builder.append(interface->name);
interface->fully_qualified_name = builder.to_string();
} else {
interface->fully_qualified_name = interface->name;
}
if constexpr (WRAPPER_GENERATOR_DEBUG) {
dbgln("Attributes:");
for (auto& attribute : interface->attributes) {
dbgln(" {}{}{} {}",
attribute.readonly ? "readonly " : "",
attribute.type.name,
attribute.type.nullable ? "?" : "",
attribute.name);
}
dbgln("Functions:");
for (auto& function : interface->functions) {
dbgln(" {}{} {}",
function.return_type.name,
function.return_type.nullable ? "?" : "",
function.name);
for (auto& parameter : function.parameters) {
dbgln(" {}{} {}",
parameter.type.name,
parameter.type.nullable ? "?" : "",
parameter.name);
}
}
}
if (header_mode)
generate_header(*interface);
if (implementation_mode)
generate_implementation(*interface);
if (constructor_header_mode)
generate_constructor_header(*interface);
if (constructor_implementation_mode)
generate_constructor_implementation(*interface);
if (prototype_header_mode)
generate_prototype_header(*interface);
if (prototype_implementation_mode)
generate_prototype_implementation(*interface);
return 0;
}
static bool should_emit_wrapper_factory(const IDL::Interface& interface)
{
// FIXME: This is very hackish.
if (interface.name == "Event")
return false;
if (interface.name == "EventTarget")
return false;
if (interface.name == "Node")
return false;
if (interface.name == "Text")
return false;
if (interface.name == "Document")
return false;
if (interface.name == "DocumentType")
return false;
if (interface.name.ends_with("Element"))
return false;
return true;
}
static bool is_wrappable_type(const IDL::Type& type)
{
if (type.name == "Node")
return true;
if (type.name == "Document")
return true;
if (type.name == "Text")
return true;
if (type.name == "DocumentType")
return true;
if (type.name.ends_with("Element"))
return true;
if (type.name == "ImageData")
return true;
return false;
}
template<typename ParameterType>
static void generate_to_cpp(SourceGenerator& generator, ParameterType& parameter, const String& js_name, const String& js_suffix, const String& cpp_name, bool return_void = false, bool legacy_null_to_empty_string = false, bool optional = false)
{
auto scoped_generator = generator.fork();
scoped_generator.set("cpp_name", make_input_acceptable_cpp(cpp_name));
scoped_generator.set("js_name", js_name);
scoped_generator.set("js_suffix", js_suffix);
scoped_generator.set("legacy_null_to_empty_string", legacy_null_to_empty_string ? "true" : "false");
scoped_generator.set("parameter.type.name", parameter.type.name);
if (return_void)
scoped_generator.set("return_statement", "return;");
else
scoped_generator.set("return_statement", "return {};");
// FIXME: Add support for optional to all types
if (parameter.type.name == "DOMString") {
if (!optional) {
scoped_generator.append(R"~~~(
auto @cpp_name@ = @js_name@@js_suffix@.to_string(global_object, @legacy_null_to_empty_string@);
if (vm.exception())
@return_statement@
)~~~");
} else {
scoped_generator.append(R"~~~(
String @cpp_name@;
if (!@js_name@@js_suffix@.is_undefined()) {
@cpp_name@ = @js_name@@js_suffix@.to_string(global_object, @legacy_null_to_empty_string@);
if (vm.exception())
@return_statement@
}
)~~~");
}
} else if (parameter.type.name == "EventListener") {
scoped_generator.append(R"~~~(
if (!@js_name@@js_suffix@.is_function()) {
vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "Function");
@return_statement@
}
auto @cpp_name@ = adopt(*new EventListener(JS::make_handle(&@js_name@@js_suffix@.as_function())));
)~~~");
} else if (is_wrappable_type(parameter.type)) {
scoped_generator.append(R"~~~(
auto @cpp_name@_object = @js_name@@js_suffix@.to_object(global_object);
if (vm.exception())
@return_statement@
if (!is<@parameter.type.name@Wrapper>(@cpp_name@_object)) {
vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "@parameter.type.name@");
@return_statement@
}
auto& @cpp_name@ = static_cast<@parameter.type.name@Wrapper*>(@cpp_name@_object)->impl();
)~~~");
} else if (parameter.type.name == "double") {
scoped_generator.append(R"~~~(
auto @cpp_name@ = @js_name@@js_suffix@.to_double(global_object);
if (vm.exception())
@return_statement@
)~~~");
} else if (parameter.type.name == "boolean") {
scoped_generator.append(R"~~~(
auto @cpp_name@ = @js_name@@js_suffix@.to_boolean();
)~~~");
} else if (parameter.type.name == "unsigned long") {
scoped_generator.append(R"~~~(
auto @cpp_name@ = @js_name@@js_suffix@.to_u32(global_object);
if (vm.exception())
@return_statement@
)~~~");
} else if (parameter.type.name == "EventHandler") {
// x.onfoo = function() { ... }
scoped_generator.append(R"~~~(
HTML::EventHandler @cpp_name@;
if (@js_name@@js_suffix@.is_function()) {
@cpp_name@.callback = JS::make_handle(&@js_name@@js_suffix@.as_function());
} else if (@js_name@@js_suffix@.is_string()) {
@cpp_name@.string = @js_name@@js_suffix@.as_string().string();
} else {
@return_statement@
}
)~~~");
} else {
dbgln("Unimplemented JS-to-C++ conversion: {}", parameter.type.name);
ASSERT_NOT_REACHED();
}
};
template<typename FunctionType>
static void generate_argument_count_check(SourceGenerator& generator, FunctionType& function)
{
auto argument_count_check_generator = generator.fork();
argument_count_check_generator.set("function.name", function.name);
argument_count_check_generator.set("function.nargs", String::number(function.length()));
if (function.length() == 0)
return;
if (function.length() == 1) {
argument_count_check_generator.set(".bad_arg_count", "JS::ErrorType::BadArgCountOne");
argument_count_check_generator.set(".arg_count_suffix", "");
} else {
argument_count_check_generator.set(".bad_arg_count", "JS::ErrorType::BadArgCountMany");
argument_count_check_generator.set(".arg_count_suffix", String::formatted(", \"{}\"", function.length()));
}
argument_count_check_generator.append(R"~~~(
if (vm.argument_count() < @function.nargs@) {
vm.throw_exception<JS::TypeError>(global_object, @.bad_arg_count@, "@function.name@"@.arg_count_suffix@);
return {};
}
)~~~");
};
static void generate_arguments(SourceGenerator& generator, const Vector<IDL::Parameter>& parameters, StringBuilder& arguments_builder, bool return_void = false)
{
auto arguments_generator = generator.fork();
Vector<String> parameter_names;
size_t argument_index = 0;
for (auto& parameter : parameters) {
parameter_names.append(make_input_acceptable_cpp(snake_name(parameter.name)));
arguments_generator.set("argument.index", String::number(argument_index));
arguments_generator.append(R"~~~(
auto arg@argument.index@ = vm.argument(@argument.index@);
)~~~");
// FIXME: Parameters can have [LegacyNullToEmptyString] attached.
generate_to_cpp(generator, parameter, "arg", String::number(argument_index), snake_name(parameter.name), return_void, false, parameter.optional);
++argument_index;
}
arguments_builder.join(", ", parameter_names);
};
static void generate_header(const IDL::Interface& interface)
{
StringBuilder builder;
SourceGenerator generator { builder };
generator.set("name", interface.name);
generator.set("fully_qualified_name", interface.fully_qualified_name);
generator.set("wrapper_base_class", interface.wrapper_base_class);
generator.set("wrapper_class", interface.wrapper_class);
generator.set("wrapper_class:snakecase", snake_name(interface.wrapper_class));
generator.append(R"~~~(
#pragma once
#include <LibWeb/Bindings/Wrapper.h>
// FIXME: This is very strange.
#if __has_include(<LibWeb/DOM/@name@.h>)
# include <LibWeb/DOM/@name@.h>
#elif __has_include(<LibWeb/HTML/@name@.h>)
# include <LibWeb/HTML/@name@.h>
#elif __has_include(<LibWeb/UIEvents/@name@.h>)
# include <LibWeb/UIEvents/@name@.h>
#elif __has_include(<LibWeb/HighResolutionTime/@name@.h>)
# include <LibWeb/HighResolutionTime/@name@.h>
#elif __has_include(<LibWeb/NavigationTiming/@name@.h>)
# include <LibWeb/NavigationTiming/@name@.h>
#elif __has_include(<LibWeb/SVG/@name@.h>)
# include <LibWeb/SVG/@name@.h>
#elif __has_include(<LibWeb/XHR/@name@.h>)
# include <LibWeb/XHR/@name@.h>
#endif
)~~~");
if (interface.wrapper_base_class != "Wrapper") {
generator.append(R"~~~(
#include <LibWeb/Bindings/@wrapper_base_class@.h>
)~~~");
}
generator.append(R"~~~(
namespace Web::Bindings {
class @wrapper_class@ : public @wrapper_base_class@ {
JS_OBJECT(@wrapper_class@, @wrapper_base_class@);
public:
static @wrapper_class@* create(JS::GlobalObject&, @fully_qualified_name@&);
@wrapper_class@(JS::GlobalObject&, @fully_qualified_name@&);
virtual void initialize(JS::GlobalObject&) override;
virtual ~@wrapper_class@() override;
)~~~");
if (interface.wrapper_base_class == "Wrapper") {
generator.append(R"~~~(
@fully_qualified_name@& impl() { return *m_impl; }
const @fully_qualified_name@& impl() const { return *m_impl; }
)~~~");
} else {
generator.append(R"~~~(
@fully_qualified_name@& impl() { return static_cast<@fully_qualified_name@&>(@wrapper_base_class@::impl()); }
const @fully_qualified_name@& impl() const { return static_cast<const @fully_qualified_name@&>(@wrapper_base_class@::impl()); }
)~~~");
}
generator.append(R"~~~(
private:
)~~~");
if (interface.wrapper_base_class == "Wrapper") {
generator.append(R"~~~(
NonnullRefPtr<@fully_qualified_name@> m_impl;
)~~~");
}
generator.append(R"~~~(
};
)~~~");
if (should_emit_wrapper_factory(interface)) {
generator.append(R"~~~(
@wrapper_class@* wrap(JS::GlobalObject&, @fully_qualified_name@&);
)~~~");
}
generator.append(R"~~~(
} // namespace Web::Bindings
)~~~");
outln("{}", generator.as_string_view());
}
void generate_implementation(const IDL::Interface& interface)
{
StringBuilder builder;
SourceGenerator generator { builder };
generator.set("name", interface.name);
generator.set("wrapper_class", interface.wrapper_class);
generator.set("wrapper_base_class", interface.wrapper_base_class);
generator.set("prototype_class", interface.prototype_class);
generator.set("fully_qualified_name", interface.fully_qualified_name);
generator.append(R"~~~(
#include <AK/FlyString.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/Function.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Uint8ClampedArray.h>
#include <LibJS/Runtime/Value.h>
#include <LibWeb/Bindings/@prototype_class@.h>
#include <LibWeb/Bindings/@wrapper_class@.h>
#include <LibWeb/Bindings/CanvasRenderingContext2DWrapper.h>
#include <LibWeb/Bindings/CommentWrapper.h>
#include <LibWeb/Bindings/DOMImplementationWrapper.h>
#include <LibWeb/Bindings/DocumentFragmentWrapper.h>
#include <LibWeb/Bindings/DocumentTypeWrapper.h>
#include <LibWeb/Bindings/DocumentWrapper.h>
#include <LibWeb/Bindings/EventTargetWrapperFactory.h>
#include <LibWeb/Bindings/HTMLCanvasElementWrapper.h>
#include <LibWeb/Bindings/HTMLHeadElementWrapper.h>
#include <LibWeb/Bindings/HTMLImageElementWrapper.h>
#include <LibWeb/Bindings/ImageDataWrapper.h>
#include <LibWeb/Bindings/NodeWrapperFactory.h>
#include <LibWeb/Bindings/TextWrapper.h>
#include <LibWeb/Bindings/WindowObject.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/EventListener.h>
#include <LibWeb/HTML/HTMLElement.h>
#include <LibWeb/Origin.h>
// FIXME: This is a total hack until we can figure out the namespace for a given type somehow.
using namespace Web::DOM;
using namespace Web::HTML;
namespace Web::Bindings {
@wrapper_class@* @wrapper_class@::create(JS::GlobalObject& global_object, @fully_qualified_name@& impl)
{
return global_object.heap().allocate<@wrapper_class@>(global_object, global_object, impl);
}
)~~~");
if (interface.wrapper_base_class == "Wrapper") {
generator.append(R"~~~(
@wrapper_class@::@wrapper_class@(JS::GlobalObject& global_object, @fully_qualified_name@& impl)
: Wrapper(static_cast<WindowObject&>(global_object).ensure_web_prototype<@prototype_class@>("@name@"))
, m_impl(impl)
{
}
)~~~");
} else {
generator.append(R"~~~(
@wrapper_class@::@wrapper_class@(JS::GlobalObject& global_object, @fully_qualified_name@& impl)
: @wrapper_base_class@(global_object, impl)
{
set_prototype(&static_cast<WindowObject&>(global_object).ensure_web_prototype<@prototype_class@>("@name@"));
}
)~~~");
}
generator.append(R"~~~(
void @wrapper_class@::initialize(JS::GlobalObject& global_object)
{
@wrapper_base_class@::initialize(global_object);
}
@wrapper_class@::~@wrapper_class@()
{
}
)~~~");
if (should_emit_wrapper_factory(interface)) {
generator.append(R"~~~(
@wrapper_class@* wrap(JS::GlobalObject& global_object, @fully_qualified_name@& impl)
{
return static_cast<@wrapper_class@*>(wrap_impl(global_object, impl));
}
)~~~");
}
generator.append(R"~~~(
} // namespace Web::Bindings
)~~~");
outln("{}", generator.as_string_view());
}
static void generate_constructor_header(const IDL::Interface& interface)
{
StringBuilder builder;
SourceGenerator generator { builder };
generator.set("name", interface.name);
generator.set("fully_qualified_name", interface.fully_qualified_name);
generator.set("constructor_class", interface.constructor_class);
generator.set("constructor_class:snakecase", snake_name(interface.constructor_class));
generator.append(R"~~~(
#pragma once
#include <LibJS/Runtime/NativeFunction.h>
namespace Web::Bindings {
class @constructor_class@ : public JS::NativeFunction {
JS_OBJECT(@constructor_class@, JS::NativeFunction);
public:
explicit @constructor_class@(JS::GlobalObject&);
virtual void initialize(JS::GlobalObject&) override;
virtual ~@constructor_class@() override;
virtual JS::Value call() override;
virtual JS::Value construct(JS::Function& new_target) override;
private:
virtual bool has_constructor() const override { return true; }
};
} // namespace Web::Bindings
)~~~");
outln("{}", generator.as_string_view());
}
void generate_constructor_implementation(const IDL::Interface& interface)
{
StringBuilder builder;
SourceGenerator generator { builder };
generator.set("name", interface.name);
generator.set("prototype_class", interface.prototype_class);
generator.set("wrapper_class", interface.wrapper_class);
generator.set("constructor_class", interface.constructor_class);
generator.set("prototype_class:snakecase", snake_name(interface.prototype_class));
generator.set("fully_qualified_name", interface.fully_qualified_name);
generator.append(R"~~~(
#include <LibJS/Heap/Heap.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibWeb/Bindings/@constructor_class@.h>
#include <LibWeb/Bindings/@prototype_class@.h>
#include <LibWeb/Bindings/@wrapper_class@.h>
#include <LibWeb/Bindings/WindowObject.h>
#if __has_include(<LibWeb/DOM/@name@.h>)
# include <LibWeb/DOM/@name@.h>
#elif __has_include(<LibWeb/HTML/@name@.h>)
# include <LibWeb/HTML/@name@.h>
#elif __has_include(<LibWeb/UIEvents/@name@.h>)
# include <LibWeb/UIEvents/@name@.h>
#elif __has_include(<LibWeb/HighResolutionTime/@name@.h>)
# include <LibWeb/HighResolutionTime/@name@.h>
#elif __has_include(<LibWeb/NavigationTiming/@name@.h>)
# include <LibWeb/NavigationTiming/@name@.h>
#elif __has_include(<LibWeb/SVG/@name@.h>)
# include <LibWeb/SVG/@name@.h>
#elif __has_include(<LibWeb/XHR/@name@.h>)
# include <LibWeb/XHR/@name@.h>
#endif
// FIXME: This is a total hack until we can figure out the namespace for a given type somehow.
using namespace Web::DOM;
using namespace Web::HTML;
namespace Web::Bindings {
@constructor_class@::@constructor_class@(JS::GlobalObject& global_object)
: NativeFunction(*global_object.function_prototype())
{
}
@constructor_class@::~@constructor_class@()
{
}
JS::Value @constructor_class@::call()
{
vm().throw_exception<JS::TypeError>(global_object(), JS::ErrorType::ConstructorWithoutNew, "@name@");
return {};
}
JS::Value @constructor_class@::construct(Function&)
{
)~~~");
if (interface.constructors.is_empty()) {
// No constructor
generator.set("constructor.length", "0");
generator.append(R"~~~(
vm().throw_exception<JS::TypeError>(global_object(), JS::ErrorType::NotAConstructor, "@name@");
return {};
)~~~");
} else if (interface.constructors.size() == 1) {
// Single constructor
auto& constructor = interface.constructors[0];
generator.set("constructor.length", String::number(constructor.length()));
generator.append(R"~~~(
[[maybe_unused]] auto& vm = this->vm();
auto& global_object = this->global_object();
auto& window = static_cast<WindowObject&>(global_object);
)~~~");
if (!constructor.parameters.is_empty()) {
generate_argument_count_check(generator, constructor);
StringBuilder arguments_builder;
generate_arguments(generator, constructor.parameters, arguments_builder);
generator.set(".constructor_arguments", arguments_builder.string_view());
generator.append(R"~~~(
auto impl = @fully_qualified_name@::create_with_global_object(window, @.constructor_arguments@);
)~~~");
} else {
generator.append(R"~~~(
auto impl = @fully_qualified_name@::create_with_global_object(window);
)~~~");
}
generator.append(R"~~~(
return @wrapper_class@::create(global_object, impl);
)~~~");
} else {
// Multiple constructor overloads - can't do that yet.
TODO();
}
generator.append(R"~~~(
}
void @constructor_class@::initialize(JS::GlobalObject& global_object)
{
auto& vm = this->vm();
auto& window = static_cast<WindowObject&>(global_object);
[[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable;
NativeFunction::initialize(global_object);
define_property(vm.names.prototype, &window.ensure_web_prototype<@prototype_class@>("@name@"), 0);
define_property(vm.names.length, JS::Value(@constructor.length@), JS::Attribute::Configurable);
)~~~");
for (auto& constant : interface.constants) {
auto constant_generator = generator.fork();
constant_generator.set("constant.name", constant.name);
constant_generator.set("constant.value", constant.value);
constant_generator.append(R"~~~(
define_property("@constant.name@", JS::Value((i32)@constant.value@), JS::Attribute::Enumerable);
)~~~");
}
generator.append(R"~~~(
}
} // namespace Web::Bindings
)~~~");
outln("{}", generator.as_string_view());
}
static void generate_prototype_header(const IDL::Interface& interface)
{
StringBuilder builder;
SourceGenerator generator { builder };
generator.set("name", interface.name);
generator.set("fully_qualified_name", interface.fully_qualified_name);
generator.set("prototype_class", interface.prototype_class);
generator.set("prototype_class:snakecase", snake_name(interface.prototype_class));
generator.append(R"~~~(
#pragma once
#include <LibJS/Runtime/Object.h>
namespace Web::Bindings {
class @prototype_class@ : public JS::Object {
JS_OBJECT(@prototype_class@, JS::Object);
public:
explicit @prototype_class@(JS::GlobalObject&);
virtual void initialize(JS::GlobalObject&) override;
virtual ~@prototype_class@() override;
private:
)~~~");
for (auto& function : interface.functions) {
auto function_generator = generator.fork();
function_generator.set("function.name:snakecase", snake_name(function.name));
function_generator.append(R"~~~(
JS_DECLARE_NATIVE_FUNCTION(@function.name:snakecase@);
)~~~");
}
for (auto& attribute : interface.attributes) {
auto attribute_generator = generator.fork();
attribute_generator.set("attribute.name:snakecase", snake_name(attribute.name));
attribute_generator.append(R"~~~(
JS_DECLARE_NATIVE_GETTER(@attribute.name:snakecase@_getter);
)~~~");
if (!attribute.readonly) {
attribute_generator.append(R"~~~(
JS_DECLARE_NATIVE_SETTER(@attribute.name:snakecase@_setter);
)~~~");
}
}
generator.append(R"~~~(
};
} // namespace Web::Bindings
)~~~");
outln("{}", generator.as_string_view());
}
void generate_prototype_implementation(const IDL::Interface& interface)
{
StringBuilder builder;
SourceGenerator generator { builder };
generator.set("name", interface.name);
generator.set("parent_name", interface.parent_name);
generator.set("prototype_class", interface.prototype_class);
generator.set("prototype_base_class", interface.prototype_base_class);
generator.set("wrapper_class", interface.wrapper_class);
generator.set("constructor_class", interface.constructor_class);
generator.set("prototype_class:snakecase", snake_name(interface.prototype_class));
generator.set("fully_qualified_name", interface.fully_qualified_name);
generator.append(R"~~~(
#include <AK/Function.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/Function.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Uint8ClampedArray.h>
#include <LibWeb/Bindings/@prototype_class@.h>
#include <LibWeb/Bindings/@wrapper_class@.h>
#include <LibWeb/Bindings/CanvasRenderingContext2DWrapper.h>
#include <LibWeb/Bindings/CommentWrapper.h>
#include <LibWeb/Bindings/DOMImplementationWrapper.h>
#include <LibWeb/Bindings/DocumentFragmentWrapper.h>
#include <LibWeb/Bindings/DocumentTypeWrapper.h>
#include <LibWeb/Bindings/DocumentWrapper.h>
#include <LibWeb/Bindings/EventTargetWrapperFactory.h>
#include <LibWeb/Bindings/HTMLCanvasElementWrapper.h>
#include <LibWeb/Bindings/HTMLHeadElementWrapper.h>
#include <LibWeb/Bindings/HTMLImageElementWrapper.h>
#include <LibWeb/Bindings/ImageDataWrapper.h>
#include <LibWeb/Bindings/NodeWrapperFactory.h>
#include <LibWeb/Bindings/PerformanceTimingWrapper.h>
#include <LibWeb/Bindings/TextWrapper.h>
#include <LibWeb/Bindings/WindowObject.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/EventListener.h>
#include <LibWeb/DOM/Window.h>
#include <LibWeb/HTML/EventHandler.h>
#include <LibWeb/HTML/HTMLElement.h>
#include <LibWeb/NavigationTiming/PerformanceTiming.h>
#include <LibWeb/Origin.h>
#if __has_include(<LibWeb/Bindings/@prototype_base_class@.h>)
# include <LibWeb/Bindings/@prototype_base_class@.h>
#endif
#if __has_include(<LibWeb/DOM/@name@.h>)
# include <LibWeb/DOM/@name@.h>
#elif __has_include(<LibWeb/HTML/@name@.h>)
# include <LibWeb/HTML/@name@.h>
#elif __has_include(<LibWeb/UIEvents/@name@.h>)
# include <LibWeb/UIEvents/@name@.h>
#elif __has_include(<LibWeb/HighResolutionTime/@name@.h>)
# include <LibWeb/HighResolutionTime/@name@.h>
#elif __has_include(<LibWeb/NavigationTiming/@name@.h>)
# include <LibWeb/NavigationTiming/@name@.h>
#elif __has_include(<LibWeb/SVG/@name@.h>)
# include <LibWeb/SVG/@name@.h>
#elif __has_include(<LibWeb/XHR/@name@.h>)
# include <LibWeb/XHR/@name@.h>
#endif
// FIXME: This is a total hack until we can figure out the namespace for a given type somehow.
using namespace Web::DOM;
using namespace Web::HTML;
using namespace Web::NavigationTiming;
using namespace Web::XHR;
namespace Web::Bindings {
@prototype_class@::@prototype_class@(JS::GlobalObject& global_object)
: Object(*global_object.object_prototype())
{
)~~~");
if (!interface.parent_name.is_empty()) {
generator.append(R"~~~(
set_prototype(&static_cast<WindowObject&>(global_object).ensure_web_prototype<@prototype_base_class@>("@parent_name@"));
)~~~");
}
generator.append(R"~~~(
}
@prototype_class@::~@prototype_class@()
{
}
void @prototype_class@::initialize(JS::GlobalObject& global_object)
{
[[maybe_unused]] auto& vm = this->vm();
[[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable | JS::Attribute::Configurable;
)~~~");
for (auto& attribute : interface.attributes) {
auto attribute_generator = generator.fork();
attribute_generator.set("attribute.name", attribute.name);
attribute_generator.set("attribute.getter_callback", attribute.getter_callback_name);
if (attribute.readonly)
attribute_generator.set("attribute.setter_callback", "nullptr");
else
attribute_generator.set("attribute.setter_callback", attribute.setter_callback_name);
attribute_generator.append(R"~~~(
define_native_property("@attribute.name@", @attribute.getter_callback@, @attribute.setter_callback@, default_attributes);
)~~~");
}
for (auto& constant : interface.constants) {
auto constant_generator = generator.fork();
constant_generator.set("constant.name", constant.name);
constant_generator.set("constant.value", constant.value);
constant_generator.append(R"~~~(
define_property("@constant.name@", JS::Value((i32)@constant.value@), JS::Attribute::Enumerable);
)~~~");
}
for (auto& function : interface.functions) {
auto function_generator = generator.fork();
function_generator.set("function.name", function.name);
function_generator.set("function.name:snakecase", snake_name(function.name));
function_generator.set("function.length", String::number(function.length()));
function_generator.append(R"~~~(
define_native_function("@function.name@", @function.name:snakecase@, @function.length@, default_attributes);
)~~~");
}
generator.append(R"~~~(
Object::initialize(global_object);
}
)~~~");
if (!interface.attributes.is_empty() || !interface.functions.is_empty()) {
generator.append(R"~~~(
static @fully_qualified_name@* impl_from(JS::VM& vm, JS::GlobalObject& global_object)
{
auto* this_object = vm.this_value(global_object).to_object(global_object);
if (!this_object)
return {};
)~~~");
if (interface.name == "EventTarget") {
generator.append(R"~~~(
if (is<WindowObject>(this_object)) {
return &static_cast<WindowObject*>(this_object)->impl();
}
)~~~");
}
generator.append(R"~~~(
if (!is<@wrapper_class@>(this_object)) {
vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "@fully_qualified_name@");
return nullptr;
}
return &static_cast<@wrapper_class@*>(this_object)->impl();
}
)~~~");
}
auto generate_return_statement = [&](auto& return_type) {
auto scoped_generator = generator.fork();
scoped_generator.set("return_type", return_type.name);
if (return_type.name == "undefined") {
scoped_generator.append(R"~~~(
return JS::js_undefined();
)~~~");
return;
}
if (return_type.nullable) {
if (return_type.name == "DOMString") {
scoped_generator.append(R"~~~(
if (retval.is_null())
return JS::js_null();
)~~~");
} else {
scoped_generator.append(R"~~~(
if (!retval)
return JS::js_null();
)~~~");
}
}
if (return_type.name == "DOMString") {
scoped_generator.append(R"~~~(
return JS::js_string(vm, retval);
)~~~");
} else if (return_type.name == "ArrayFromVector") {
// FIXME: Remove this fake type hack once it's no longer needed.
// Basically once we have NodeList we can throw this out.
scoped_generator.append(R"~~~(
auto* new_array = JS::Array::create(global_object);
for (auto& element : retval)
new_array->indexed_properties().append(wrap(global_object, element));
return new_array;
)~~~");
} else if (return_type.name == "boolean" || return_type.name == "double" || return_type.name == "long" || return_type.name == "unsigned long") {
scoped_generator.append(R"~~~(
return JS::Value(retval);
)~~~");
} else if (return_type.name == "short" || return_type.name == "unsigned short") {
scoped_generator.append(R"~~~(
return JS::Value((i32)retval);
)~~~");
} else if (return_type.name == "Uint8ClampedArray") {
scoped_generator.append(R"~~~(
return retval;
)~~~");
} else if (return_type.name == "EventHandler") {
scoped_generator.append(R"~~~(
return retval.callback.cell();
)~~~");
} else {
scoped_generator.append(R"~~~(
return wrap(global_object, const_cast<@return_type@&>(*retval));
)~~~");
}
};
for (auto& attribute : interface.attributes) {
auto attribute_generator = generator.fork();
attribute_generator.set("attribute.getter_callback", attribute.getter_callback_name);
attribute_generator.set("attribute.setter_callback", attribute.setter_callback_name);
attribute_generator.set("attribute.name:snakecase", snake_name(attribute.name));
if (attribute.extended_attributes.contains("Reflect")) {
auto attribute_name = attribute.extended_attributes.get("Reflect").value();
if (attribute_name.is_null())
attribute_name = attribute.name;
attribute_name = make_input_acceptable_cpp(attribute_name);
attribute_generator.set("attribute.reflect_name", attribute_name);
} else {
attribute_generator.set("attribute.reflect_name", snake_name(attribute.name));
}
attribute_generator.append(R"~~~(
JS_DEFINE_NATIVE_GETTER(@prototype_class@::@attribute.getter_callback@)
{
auto* impl = impl_from(vm, global_object);
if (!impl)
return {};
)~~~");
if (attribute.extended_attributes.contains("ReturnNullIfCrossOrigin")) {
attribute_generator.append(R"~~~(
if (!impl->may_access_from_origin(static_cast<WindowObject&>(global_object).origin()))
return JS::js_null();
)~~~");
}
if (attribute.extended_attributes.contains("Reflect")) {
if (attribute.type.name != "boolean") {
attribute_generator.append(R"~~~(
auto retval = impl->attribute(HTML::AttributeNames::@attribute.reflect_name@);
)~~~");
} else {
attribute_generator.append(R"~~~(
auto retval = impl->has_attribute(HTML::AttributeNames::@attribute.reflect_name@);
)~~~");
}
} else {
attribute_generator.append(R"~~~(
auto retval = impl->@attribute.name:snakecase@();
)~~~");
}
generate_return_statement(attribute.type);
attribute_generator.append(R"~~~(
}
)~~~");
if (!attribute.readonly) {
attribute_generator.append(R"~~~(
JS_DEFINE_NATIVE_SETTER(@prototype_class@::@attribute.setter_callback@)
{
auto* impl = impl_from(vm, global_object);
if (!impl)
return;
)~~~");
generate_to_cpp(generator, attribute, "value", "", "cpp_value", true, attribute.extended_attributes.contains("LegacyNullToEmptyString"));
if (attribute.extended_attributes.contains("Reflect")) {
if (attribute.type.name != "boolean") {
attribute_generator.append(R"~~~(
impl->set_attribute(HTML::AttributeNames::@attribute.reflect_name@, cpp_value);
)~~~");
} else {
attribute_generator.append(R"~~~(
if (!cpp_value)
impl->remove_attribute(HTML::AttributeNames::@attribute.reflect_name@);
else
impl->set_attribute(HTML::AttributeNames::@attribute.reflect_name@, String::empty());
)~~~");
}
} else {
attribute_generator.append(R"~~~(
impl->set_@attribute.name:snakecase@(cpp_value);
)~~~");
}
attribute_generator.append(R"~~~(
}
)~~~");
}
}
// Implementation: Functions
for (auto& function : interface.functions) {
auto function_generator = generator.fork();
function_generator.set("function.name", function.name);
function_generator.set("function.name:snakecase", snake_name(function.name));
function_generator.append(R"~~~(
JS_DEFINE_NATIVE_FUNCTION(@prototype_class@::@function.name:snakecase@)
{
auto* impl = impl_from(vm, global_object);
if (!impl)
return {};
)~~~");
generate_argument_count_check(generator, function);
StringBuilder arguments_builder;
generate_arguments(generator, function.parameters, arguments_builder);
function_generator.set(".arguments", arguments_builder.string_view());
if (function.return_type.name != "undefined") {
function_generator.append(R"~~~(
auto retval = impl->@function.name:snakecase@(@.arguments@);
)~~~");
} else {
function_generator.append(R"~~~(
impl->@function.name:snakecase@(@.arguments@);
)~~~");
}
generate_return_statement(function.return_type);
function_generator.append(R"~~~(
}
)~~~");
}
generator.append(R"~~~(
} // namespace Web::Bindings
)~~~");
outln("{}", generator.as_string_view());
}