1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-24 18:47:41 +00:00

LibWeb: Start generating JS wrappers from (simplified) WebIDL :^)

This patch introduces a hackish but functional IDL parser and uses it
to generate the JS bindings for Node and Document.

We'll see how far this simple parser takes us. The important thing
right now is generating code, not being a perfect IDL parser. :^)
This commit is contained in:
Andreas Kling 2020-06-20 22:09:38 +02:00
parent 8d6910b78e
commit 1ffffa0053
15 changed files with 561 additions and 234 deletions

View file

@ -34,6 +34,7 @@
#include <LibWeb/Bindings/CanvasRenderingContext2DWrapper.h>
#include <LibWeb/Bindings/HTMLImageElementWrapper.h>
#include <LibWeb/Bindings/ImageDataWrapper.h>
#include <LibWeb/Bindings/NodeWrapperFactory.h>
#include <LibWeb/DOM/CanvasRenderingContext2D.h>
#include <LibWeb/DOM/HTMLCanvasElement.h>
#include <LibWeb/DOM/HTMLImageElement.h>

View file

@ -1,134 +0,0 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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/FlyString.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/Value.h>
#include <LibWeb/Bindings/DocumentWrapper.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Element.h>
namespace Web {
namespace Bindings {
DocumentWrapper::DocumentWrapper(JS::GlobalObject& global_object, Document& document)
: NodeWrapper(global_object, document)
{
}
void DocumentWrapper::initialize(JS::Interpreter& interpreter, JS::GlobalObject& global_object)
{
NodeWrapper::initialize(interpreter, global_object);
define_native_function("getElementById", get_element_by_id, 1);
define_native_function("querySelector", query_selector, 1);
define_native_function("querySelectorAll", query_selector_all, 1);
}
DocumentWrapper::~DocumentWrapper()
{
}
Document& DocumentWrapper::node()
{
return static_cast<Document&>(NodeWrapper::node());
}
const Document& DocumentWrapper::node() const
{
return static_cast<const Document&>(NodeWrapper::node());
}
static Document* impl_from(JS::Interpreter& interpreter, JS::GlobalObject& global_object)
{
auto* this_object = interpreter.this_value(global_object).to_object(interpreter, global_object);
if (!this_object)
return {};
if (StringView("DocumentWrapper") != this_object->class_name()) {
interpreter.throw_exception<JS::TypeError>(JS::ErrorType::NotA, "DocumentWrapper");
return {};
}
return &static_cast<DocumentWrapper*>(this_object)->node();
}
JS_DEFINE_NATIVE_FUNCTION(DocumentWrapper::get_element_by_id)
{
auto* document = impl_from(interpreter, global_object);
if (!document)
return {};
if (!interpreter.argument_count())
return interpreter.throw_exception<JS::TypeError>(JS::ErrorType::BadArgCountOne, "getElementById");
auto id = interpreter.argument(0).to_string(interpreter);
if (interpreter.exception())
return {};
auto* element = document->get_element_by_id(id);
if (!element)
return JS::js_null();
return wrap(interpreter.heap(), const_cast<Element&>(*element));
}
JS_DEFINE_NATIVE_FUNCTION(DocumentWrapper::query_selector)
{
auto* document = impl_from(interpreter, global_object);
if (!document)
return {};
if (!interpreter.argument_count())
return interpreter.throw_exception<JS::TypeError>(JS::ErrorType::BadArgCountOne, "querySelector");
auto selector = interpreter.argument(0).to_string(interpreter);
if (interpreter.exception())
return {};
// FIXME: Throw if selector is invalid
auto element = document->query_selector(selector);
if (!element)
return JS::js_null();
return wrap(interpreter.heap(), *element);
}
JS_DEFINE_NATIVE_FUNCTION(DocumentWrapper::query_selector_all)
{
auto* document = impl_from(interpreter, global_object);
if (!document)
return {};
if (!interpreter.argument_count())
return interpreter.throw_exception<JS::TypeError>(JS::ErrorType::BadArgCountOne, "querySelectorAll");
auto selector = interpreter.argument(0).to_string(interpreter);
if (interpreter.exception())
return {};
// FIXME: Throw if selector is invalid
auto elements = document->query_selector_all(selector);
// FIXME: This should be a static NodeList, not a plain JS::Array.
auto* node_list = JS::Array::create(global_object);
for (auto& element : elements) {
node_list->indexed_properties().append(wrap(interpreter.heap(), element));
}
return node_list;
}
}
}

View file

@ -1,52 +0,0 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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.
*/
#pragma once
#include <LibWeb/Bindings/NodeWrapper.h>
namespace Web {
namespace Bindings {
class DocumentWrapper : public NodeWrapper {
public:
DocumentWrapper(JS::GlobalObject&, Document&);
virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;
virtual ~DocumentWrapper() override;
Document& node();
const Document& node() const;
private:
virtual const char* class_name() const override { return "DocumentWrapper"; }
JS_DECLARE_NATIVE_FUNCTION(get_element_by_id);
JS_DECLARE_NATIVE_FUNCTION(query_selector);
JS_DECLARE_NATIVE_FUNCTION(query_selector_all);
};
}
}

View file

@ -61,12 +61,12 @@ ElementWrapper::~ElementWrapper()
Element& ElementWrapper::node()
{
return static_cast<Element&>(NodeWrapper::node());
return static_cast<Element&>(NodeWrapper::impl());
}
const Element& ElementWrapper::node() const
{
return static_cast<const Element&>(NodeWrapper::node());
return static_cast<const Element&>(NodeWrapper::impl());
}
static Element* impl_from(JS::Interpreter& interpreter, JS::GlobalObject& global_object)

View file

@ -57,12 +57,12 @@ HTMLCanvasElementWrapper::~HTMLCanvasElementWrapper()
HTMLCanvasElement& HTMLCanvasElementWrapper::node()
{
return static_cast<HTMLCanvasElement&>(NodeWrapper::node());
return static_cast<HTMLCanvasElement&>(NodeWrapper::impl());
}
const HTMLCanvasElement& HTMLCanvasElementWrapper::node() const
{
return static_cast<const HTMLCanvasElement&>(NodeWrapper::node());
return static_cast<const HTMLCanvasElement&>(NodeWrapper::impl());
}
static HTMLCanvasElement* impl_from(JS::Interpreter& interpreter, JS::GlobalObject& global_object)

View file

@ -46,12 +46,12 @@ HTMLImageElementWrapper::~HTMLImageElementWrapper()
HTMLImageElement& HTMLImageElementWrapper::node()
{
return static_cast<HTMLImageElement&>(NodeWrapper::node());
return static_cast<HTMLImageElement&>(NodeWrapper::impl());
}
const HTMLImageElement& HTMLImageElementWrapper::node() const
{
return static_cast<const HTMLImageElement&>(NodeWrapper::node());
return static_cast<const HTMLImageElement&>(NodeWrapper::impl());
}
}

View file

@ -24,9 +24,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/FlyString.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Interpreter.h>
#include <LibWeb/Bindings/DocumentWrapper.h>
#include <LibWeb/Bindings/HTMLCanvasElementWrapper.h>
#include <LibWeb/Bindings/HTMLImageElementWrapper.h>
@ -52,30 +50,5 @@ NodeWrapper* wrap(JS::Heap& heap, Node& node)
return static_cast<NodeWrapper*>(wrap_impl(heap, node));
}
NodeWrapper::NodeWrapper(JS::GlobalObject& global_object, Node& node)
: EventTargetWrapper(global_object, node)
{
}
void NodeWrapper::initialize(JS::Interpreter& interpreter, JS::GlobalObject& global_object)
{
EventTargetWrapper::initialize(interpreter, global_object);
put("nodeName", JS::js_string(interpreter.heap(), node().node_name()));
}
NodeWrapper::~NodeWrapper()
{
}
Node& NodeWrapper::node()
{
return static_cast<Node&>(EventTargetWrapper::impl());
}
const Node& NodeWrapper::node() const
{
return static_cast<const Node&>(EventTargetWrapper::impl());
}
}
}

View file

@ -26,24 +26,12 @@
#pragma once
#include <LibWeb/Bindings/EventTargetWrapper.h>
#include <LibWeb/Forward.h>
#include <LibJS/Forward.h>
namespace Web {
namespace Bindings {
class NodeWrapper : public EventTargetWrapper {
public:
NodeWrapper(JS::GlobalObject&, Node&);
virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;
virtual ~NodeWrapper() override;
Node& node();
const Node& node() const;
private:
virtual const char* class_name() const override { return "NodeWrapper"; }
};
NodeWrapper* wrap(JS::Heap&, Node&);
}

View file

@ -36,6 +36,7 @@
#include <LibWeb/Bindings/DocumentWrapper.h>
#include <LibWeb/Bindings/LocationObject.h>
#include <LibWeb/Bindings/NavigatorObject.h>
#include <LibWeb/Bindings/NodeWrapperFactory.h>
#include <LibWeb/Bindings/WindowObject.h>
#include <LibWeb/Bindings/XMLHttpRequestConstructor.h>
#include <LibWeb/Bindings/XMLHttpRequestPrototype.h>

View file

@ -1,6 +1,7 @@
set(SOURCES
Bindings/CanvasRenderingContext2DWrapper.cpp
Bindings/DocumentWrapper.cpp
Bindings/DocumentWrapper.h
Bindings/ElementWrapper.cpp
Bindings/EventListenerWrapper.cpp
Bindings/EventTargetWrapper.cpp
@ -12,6 +13,8 @@ set(SOURCES
Bindings/MouseEventWrapper.cpp
Bindings/NavigatorObject.cpp
Bindings/NodeWrapper.cpp
Bindings/NodeWrapper.h
Bindings/NodeWrapperFactory.cpp
Bindings/WindowObject.cpp
Bindings/Wrappable.cpp
Bindings/XMLHttpRequestConstructor.cpp
@ -123,6 +126,46 @@ set(GENERATED_SOURCES
../../Services/ProtocolServer/ProtocolServerEndpoint.h
)
add_custom_command(
OUTPUT Bindings/NodeWrapper.h
COMMAND /bin/mkdir -p Bindings
COMMAND WrapperGenerator --header ${CMAKE_CURRENT_SOURCE_DIR}/DOM/Node.idl > Bindings/NodeWrapper.h
VERBATIM
DEPENDS WrapperGenerator
MAIN_DEPENDENCY DOM/Node.idl
)
add_custom_target(generate_NodeWrapper.h DEPENDS Bindings/NodeWrapper.h)
add_custom_command(
OUTPUT Bindings/NodeWrapper.cpp
COMMAND /bin/mkdir -p Bindings
COMMAND WrapperGenerator --implementation ${CMAKE_CURRENT_SOURCE_DIR}/DOM/Node.idl > Bindings/NodeWrapper.cpp
VERBATIM
DEPENDS WrapperGenerator
MAIN_DEPENDENCY DOM/Node.idl
)
add_custom_target(generate_NodeWrapper.cpp DEPENDS Bindings/NodeWrapper.cpp)
add_custom_command(
OUTPUT Bindings/DocumentWrapper.h
COMMAND /bin/mkdir -p Bindings
COMMAND WrapperGenerator --header ${CMAKE_CURRENT_SOURCE_DIR}/DOM/Document.idl > Bindings/DocumentWrapper.h
VERBATIM
DEPENDS WrapperGenerator
MAIN_DEPENDENCY DOM/Document.idl
)
add_custom_target(generate_DocumentWrapper.h DEPENDS Bindings/DocumentWrapper.h)
add_custom_command(
OUTPUT Bindings/DocumentWrapper.cpp
COMMAND /bin/mkdir -p Bindings
COMMAND WrapperGenerator --implementation ${CMAKE_CURRENT_SOURCE_DIR}/DOM/Document.idl > Bindings/DocumentWrapper.cpp
VERBATIM
DEPENDS WrapperGenerator
MAIN_DEPENDENCY DOM/Document.idl
)
add_custom_target(generate_DocumentWrapper.cpp DEPENDS Bindings/DocumentWrapper.cpp)
add_custom_command(
OUTPUT CSS/PropertyID.h
COMMAND /bin/mkdir -p CSS

View file

@ -1,4 +1,6 @@
add_executable(Generate_CSS_PropertyID_h Generate_CSS_PropertyID_h.cpp)
add_executable(Generate_CSS_PropertyID_cpp Generate_CSS_PropertyID_cpp.cpp)
add_executable(WrapperGenerator WrapperGenerator.cpp)
target_link_libraries(Generate_CSS_PropertyID_h LagomCore)
target_link_libraries(Generate_CSS_PropertyID_cpp LagomCore)
target_link_libraries(WrapperGenerator LagomCore)

View file

@ -0,0 +1,487 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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/StringBuilder.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <ctype.h>
static String snake_name(const StringView& camel_name)
{
StringBuilder builder;
for (auto ch : camel_name) {
if (isupper(ch)) {
builder.append('_');
builder.append(tolower(ch));
} else {
builder.append(ch);
}
}
return builder.to_string();
}
namespace IDL {
struct Type {
String name;
bool nullable { false };
};
struct Parameter {
Type type;
String name;
};
struct Function {
Type return_type;
String name;
Vector<Parameter> parameters;
size_t length() const
{
// FIXME: Take optional arguments into account
return parameters.size();
}
};
struct Attribute {
bool readonly { false };
Type type;
String name;
// Added for convenience after parsing
String getter_callback_name;
String setter_callback_name;
};
struct Interface {
String name;
String parent_name;
Vector<Attribute> attributes;
Vector<Function> functions;
// Added for convenience after parsing
String wrapper_class;
String wrapper_base_class;
};
static String snake_name(const StringView& camel_name)
{
StringBuilder builder;
for (auto ch : camel_name) {
if (isupper(ch)) {
builder.append('_');
builder.append(tolower(ch));
} else {
builder.append(ch);
}
}
return builder.to_string();
}
OwnPtr<Interface> parse_interface(const StringView& input)
{
auto interface = make<Interface>();
size_t index = 0;
auto peek = [&](size_t offset = 0) -> char {
if (index + offset > input.length())
return 0;
return input[index + offset];
};
auto consume = [&] {
return input[index++];
};
auto consume_if = [&](auto ch) {
if (peek() == ch) {
consume();
return true;
}
return false;
};
auto consume_specific = [&](char ch) {
auto consumed = consume();
if (consumed != ch) {
dbg() << "Expected '" << ch << "' at offset " << index << " but got '" << consumed << "'";
ASSERT_NOT_REACHED();
}
};
auto consume_whitespace = [&] {
while (isspace(peek()))
consume();
};
auto consume_string = [&](const StringView& string) {
for (size_t i = 0; i < string.length(); ++i) {
ASSERT(consume() == string[i]);
}
};
auto next_is = [&](const StringView& string) {
for (size_t i = 0; i < string.length(); ++i) {
if (peek(i) != string[i])
return false;
}
return true;
};
auto consume_while = [&](auto condition) {
StringBuilder builder;
while (index < input.length() && condition(peek())) {
builder.append(consume());
}
return builder.to_string();
};
consume_string("interface");
consume_whitespace();
interface->name = consume_while([](auto ch) { return !isspace(ch); });
consume_whitespace();
if (consume_if(':')) {
consume_whitespace();
interface->parent_name = consume_while([](auto ch) { return !isspace(ch); });
consume_whitespace();
}
consume_specific('{');
auto parse_type = [&] {
auto name = consume_while([](auto ch) { return !isspace(ch) && ch != '?'; });
auto nullable = peek() == '?';
if (nullable)
consume_specific('?');
return Type { name, nullable };
};
auto parse_attribute = [&] {
bool readonly = false;
if (next_is("readonly")) {
consume_string("readonly");
readonly = true;
consume_whitespace();
}
if (next_is("attribute")) {
consume_string("attribute");
consume_whitespace();
}
auto type = parse_type();
consume_whitespace();
auto name = consume_while([](auto ch) { return !isspace(ch) && ch != ';'; });
consume_specific(';');
Attribute attribute;
attribute.readonly = readonly;
attribute.type = type;
attribute.name = name;
attribute.getter_callback_name = String::format("%s_getter", snake_name(attribute.name).characters());
attribute.setter_callback_name = String::format("%s_setter", snake_name(attribute.name).characters());
interface->attributes.append(move(attribute));
};
auto parse_function = [&] {
auto return_type = parse_type();
consume_whitespace();
auto name = consume_while([](auto ch) { return !isspace(ch) && ch != '('; });
consume_specific('(');
Vector<Parameter> parameters;
for (;;) {
auto type = parse_type();
consume_whitespace();
auto name = consume_while([](auto ch) { return !isspace(ch) && ch != ',' && ch != ')'; });
parameters.append({ move(type), move(name) });
if (consume_if(')'))
break;
consume_specific(',');
consume_whitespace();
}
consume_specific(';');
interface->functions.append(Function { return_type, name, move(parameters) });
};
for (;;) {
consume_whitespace();
if (consume_if('}'))
break;
if (next_is("readonly") || next_is("attribute")) {
parse_attribute();
continue;
}
parse_function();
}
interface->wrapper_class = String::format("%sWrapper", interface->name.characters());
interface->wrapper_base_class = String::format("%sWrapper", interface->parent_name.characters());
return 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;
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_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;
}
auto data = file_or_error.value()->read_all();
auto interface = IDL::parse_interface(data);
if (!interface) {
fprintf(stderr, "Cannot parse %s\n", path);
return 1;
}
#if 0
dbg() << "Attributes:";
for (auto& attribute : interface->attributes) {
dbg() << " " << (attribute.readonly ? "Readonly " : "")
<< attribute.type.name << (attribute.type.nullable ? "?" : "")
<< " " << attribute.name;
}
dbg() << "Functions:";
for (auto& function : interface->functions) {
dbg() << " " << function.return_type.name << (function.return_type.nullable ? "?" : "")
<< " " << function.name;
for (auto& parameter : function.parameters) {
dbg() << " " << parameter.type.name << (parameter.type.nullable ? "?" : "") << " " << parameter.name;
}
}
#endif
if (header_mode)
generate_header(*interface);
if (implementation_mode)
generate_implementation(*interface);
return 0;
}
static void generate_header(const IDL::Interface& interface)
{
auto& wrapper_class = interface.wrapper_class;
auto& wrapper_base_class = interface.wrapper_base_class;
out() << "#pragma once";
out() << "#include <LibWeb/Bindings/Wrapper.h>";
out() << "#include <LibWeb/DOM/" << interface.name << ".h>";
if (!wrapper_base_class.is_empty()) {
out() << "#include <LibWeb/Bindings/" << wrapper_base_class << ".h>";
}
out() << "namespace Web {";
out() << "namespace Bindings {";
out() << "class " << wrapper_class << " : public " << wrapper_base_class << " {";
out() << "public:";
out() << " " << wrapper_class << "(JS::GlobalObject&, " << interface.name << "&);";
out() << " virtual void initialize(JS::Interpreter&, JS::GlobalObject&) override;";
out() << " virtual ~" << wrapper_class << "() override;";
if (wrapper_base_class.is_empty()) {
out() << " " << interface.name << "& impl() { return *m_impl; }";
out() << " const " << interface.name << "& impl() const { return *m_impl; }";
} else {
out() << " " << interface.name << "& impl() { return static_cast<" << interface.name << "&>(" << wrapper_base_class << "::impl()); }";
out() << " const " << interface.name << "& impl() const { return static_cast<const " << interface.name << "&>(" << wrapper_base_class << "::impl()); }";
}
out() << "private:";
out() << " virtual const char* class_name() const override { return \"" << interface.name << "\"; }";
for (auto& function : interface.functions) {
out() << " JS_DECLARE_NATIVE_FUNCTION(" << snake_name(function.name) << ");";
}
for (auto& attribute : interface.attributes) {
out() << " JS_DECLARE_NATIVE_GETTER(" << snake_name(attribute.name) << "_getter);";
if (!attribute.readonly)
out() << " JS_DECLARE_NATIVE_SETTER(" << snake_name(attribute.name) << "_setter);";
}
out() << "};";
out() << "}";
out() << "}";
}
void generate_implementation(const IDL::Interface& interface)
{
auto& wrapper_class = interface.wrapper_class;
auto& wrapper_base_class = interface.wrapper_base_class;
out() << "#include <AK/FlyString.h>";
out() << "#include <LibJS/Interpreter.h>";
out() << "#include <LibJS/Runtime/Array.h>";
out() << "#include <LibJS/Runtime/Value.h>";
out() << "#include <LibJS/Runtime/GlobalObject.h>";
out() << "#include <LibJS/Runtime/Error.h>";
out() << "#include <LibWeb/Bindings/NodeWrapperFactory.h>";
out() << "#include <LibWeb/Bindings/" << wrapper_class << ".h>";
out() << "#include <LibWeb/DOM/Element.h>";
out() << "namespace Web {";
out() << "namespace Bindings {";
// Implementation: Wrapper constructor
out() << wrapper_class << "::" << wrapper_class << "(JS::GlobalObject& global_object, " << interface.name << "& impl)";
out() << " : " << wrapper_base_class << "(global_object, impl)";
out() << "{";
out() << "}";
// Implementation: Wrapper initialize()
out() << "void " << wrapper_class << "::initialize(JS::Interpreter& interpreter, JS::GlobalObject& global_object)";
out() << "{";
out() << " [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable | JS::Attribute::Configurable;";
out() << " " << wrapper_base_class << "::initialize(interpreter, global_object);";
for (auto& attribute : interface.attributes) {
out() << " define_native_property(\"" << attribute.name << "\", " << attribute.getter_callback_name << ", " << (attribute.readonly ? "nullptr" : attribute.setter_callback_name) << ", default_attributes);";
}
for (auto& function : interface.functions) {
out() << " define_native_function(\"" << function.name << "\", " << snake_name(function.name) << ", " << function.length() << ", default_attributes);";
}
out() << "}";
// Implementation: Wrapper destructor
out() << wrapper_class << "::~" << wrapper_class << "()";
out() << "{";
out() << "}";
// Implementation: impl_from()
out() << "static " << interface.name << "* impl_from(JS::Interpreter& interpreter, JS::GlobalObject& global_object)";
out() << "{";
out() << " auto* this_object = interpreter.this_value(global_object).to_object(interpreter, global_object);";
out() << " if (!this_object)";
out() << " return {};";
out() << " if (StringView(\"" << interface.name << "\") != this_object->class_name()) {";
out() << " interpreter.throw_exception<JS::TypeError>(JS::ErrorType::NotA, \"" << interface.name << "\");";
out() << " return nullptr;";
out() << " }";
out() << " return &static_cast<" << wrapper_class << "*>(this_object)->impl();";
out() << "}";
auto generate_return_statement = [&](auto& return_type) {
if (return_type.nullable) {
out() << " if (!retval)";
out() << " return JS::js_null();";
}
if (return_type.name == "DOMString") {
out() << " return JS::js_string(interpreter, 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.
out() << " auto* new_array = JS::Array::create(global_object);";
out() << " for (auto& element : retval) {";
out() << " new_array->indexed_properties().append(wrap(interpreter.heap(), element));";
out() << " }";
out() << " return new_array;";
} else {
out() << " return wrap(interpreter.heap(), const_cast<" << return_type.name << "&>(*retval));";
}
};
// Implementation: Attributes
for (auto& attribute : interface.attributes) {
out() << "JS_DEFINE_NATIVE_GETTER(" << wrapper_class << "::" << snake_name(attribute.name) << "_getter)";
out() << "{";
out() << " auto* impl = impl_from(interpreter, global_object);";
out() << " if (!impl)";
out() << " return {};";
out() << " auto retval = impl->" << snake_name(attribute.name) << "();";
generate_return_statement(attribute.type);
out() << "}";
}
// Implementation: Functions
for (auto& function : interface.functions) {
out() << "JS_DEFINE_NATIVE_FUNCTION(" << wrapper_class << "::" << snake_name(function.name) << ")";
out() << "{";
out() << " auto* impl = impl_from(interpreter, global_object);";
out() << " if (!impl)";
out() << " return {};";
out() << " if (interpreter.argument_count() < " << function.length() << ")";
out() << " return interpreter.throw_exception<JS::TypeError>(JS::ErrorType::BadArgCountMany, \"" << function.name << "\", \"" << function.length() << "\");";
Vector<String> parameter_names;
size_t argument_index = 0;
for (auto& parameter : function.parameters) {
parameter_names.append(parameter.name);
if (parameter.type.name == "DOMString") {
out() << " auto " << snake_name(parameter.name) << " = interpreter.argument(" << argument_index << ").to_string(interpreter);";
out() << " if (interpreter.exception())";
out() << " return {};";
}
++argument_index;
}
StringBuilder arguments_builder;
arguments_builder.join(", ", parameter_names);
if (function.return_type.name != "void") {
out() << " auto retval = impl->" << snake_name(function.name) << "(" << arguments_builder.to_string() << ");";
} else {
out() << " impl->" << snake_name(function.name) << "(" << arguments_builder.to_string() << ");";
}
generate_return_statement(function.return_type);
out() << "}";
}
out() << "}";
out() << "}";
}

View file

@ -0,0 +1,7 @@
interface Document : Node {
Element? getElementById(DOMString id);
Element? querySelector(DOMString selectors);
ArrayFromVector querySelectorAll(DOMString selectors);
}

View file

@ -32,6 +32,7 @@
#include <LibJS/Runtime/ScriptFunction.h>
#include <LibWeb/Bindings/EventWrapper.h>
#include <LibWeb/Bindings/NodeWrapper.h>
#include <LibWeb/Bindings/NodeWrapperFactory.h>
#include <LibWeb/CSS/StyleResolver.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/Event.h>

View file

@ -0,0 +1,10 @@
interface Node : EventTarget {
readonly attribute DOMString nodeName;
readonly attribute Node? firstChild;
readonly attribute Node? lastChild;
readonly attribute Node? previousSibling;
readonly attribute Node? nextSibling;
}