mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-04-25 05:55:13 +00:00
e8b3a65581
Specification: https://dom.spec.whatwg.org/#concept-event-dispatch This also introduces shadow roots due to it being a requirement of the event dispatcher. However, it does not introduce the full shadow DOM, that can be left for future work. This changes some event dispatches which require certain attributes to be initialised to a value.
908 lines
30 KiB
C++
908 lines
30 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/ByteBuffer.h>
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#include <AK/GenericLexer.h>
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#include <AK/HashMap.h>
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#include <AK/LexicalPath.h>
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#include <AK/SourceGenerator.h>
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#include <AK/StringBuilder.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <ctype.h>
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static String snake_name(const StringView& title_name)
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{
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StringBuilder builder;
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bool first = true;
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bool last_was_uppercase = false;
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for (auto ch : title_name) {
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if (isupper(ch)) {
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if (!first && !last_was_uppercase)
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builder.append('_');
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builder.append(tolower(ch));
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} else {
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builder.append(ch);
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}
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first = false;
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last_was_uppercase = isupper(ch);
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}
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return builder.to_string();
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}
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static String make_input_acceptable_cpp(const String& input)
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{
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if (input.is_one_of("class", "template", "for", "default", "char")) {
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StringBuilder builder;
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builder.append(input);
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builder.append('_');
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return builder.to_string();
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}
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String input_without_dashes = input;
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input_without_dashes.replace("-", "_");
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return input_without_dashes;
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}
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namespace IDL {
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struct Type {
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String name;
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bool nullable { false };
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};
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struct Parameter {
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Type type;
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String name;
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bool optional { false };
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};
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struct Function {
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Type return_type;
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String name;
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Vector<Parameter> parameters;
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HashMap<String, String> extended_attributes;
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size_t length() const
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{
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// FIXME: This seems to produce a length that is way over what it's supposed to be.
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// For example, getElementsByTagName has its length set to 20 when it should be 1.
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size_t length = 0;
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for (auto& parameter : parameters) {
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if (!parameter.optional)
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length++;
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}
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return length;
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}
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};
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struct Attribute {
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bool readonly { false };
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bool unsigned_ { false };
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Type type;
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String name;
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HashMap<String, String> extended_attributes;
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// Added for convenience after parsing
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String getter_callback_name;
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String setter_callback_name;
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};
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struct Interface {
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String name;
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String parent_name;
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Vector<Attribute> attributes;
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Vector<Function> functions;
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// Added for convenience after parsing
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String wrapper_class;
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String wrapper_base_class;
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String fully_qualified_name;
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};
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static OwnPtr<Interface> parse_interface(const StringView& input)
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{
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auto interface = make<Interface>();
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GenericLexer lexer(input);
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auto assert_specific = [&](char ch) {
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auto consumed = lexer.consume();
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if (consumed != ch) {
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dbg() << "Expected '" << ch << "' at offset " << lexer.tell() << " but got '" << consumed << "'";
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ASSERT_NOT_REACHED();
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}
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};
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auto consume_whitespace = [&] {
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lexer.consume_while([](char ch) { return isspace(ch); });
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};
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auto assert_string = [&](const StringView& expected) {
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bool saw_expected = lexer.consume_specific(expected);
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ASSERT(saw_expected);
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};
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assert_string("interface");
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consume_whitespace();
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interface->name = lexer.consume_until([](auto ch) { return isspace(ch); });
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consume_whitespace();
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if (lexer.consume_specific(':')) {
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consume_whitespace();
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interface->parent_name = lexer.consume_until([](auto ch) { return isspace(ch); });
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consume_whitespace();
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}
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assert_specific('{');
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auto parse_type = [&] {
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auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == '?'; });
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auto nullable = lexer.consume_specific('?');
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return Type { name, nullable };
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};
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auto parse_attribute = [&](HashMap<String, String>& extended_attributes) {
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bool readonly = lexer.consume_specific("readonly");
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if (readonly)
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consume_whitespace();
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if (lexer.consume_specific("attribute"))
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consume_whitespace();
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bool unsigned_ = lexer.consume_specific("unsigned");
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if (unsigned_)
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consume_whitespace();
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auto type = parse_type();
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consume_whitespace();
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auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == ';'; });
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consume_whitespace();
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assert_specific(';');
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Attribute attribute;
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attribute.readonly = readonly;
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attribute.unsigned_ = unsigned_;
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attribute.type = type;
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attribute.name = name;
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attribute.getter_callback_name = String::format("%s_getter", snake_name(attribute.name).characters());
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attribute.setter_callback_name = String::format("%s_setter", snake_name(attribute.name).characters());
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attribute.extended_attributes = move(extended_attributes);
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interface->attributes.append(move(attribute));
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};
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auto parse_function = [&](HashMap<String, String>& extended_attributes) {
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auto return_type = parse_type();
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consume_whitespace();
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auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == '('; });
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consume_whitespace();
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assert_specific('(');
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Vector<Parameter> parameters;
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for (;;) {
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if (lexer.consume_specific(')'))
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break;
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bool optional = lexer.consume_specific("optional");
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if (optional)
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consume_whitespace();
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auto type = parse_type();
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consume_whitespace();
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auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == ',' || ch == ')'; });
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parameters.append({ move(type), move(name), optional });
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if (lexer.consume_specific(')'))
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break;
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assert_specific(',');
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consume_whitespace();
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}
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consume_whitespace();
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assert_specific(';');
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interface->functions.append(Function { return_type, name, move(parameters), move(extended_attributes) });
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};
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auto parse_extended_attributes = [&] {
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HashMap<String, String> extended_attributes;
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for (;;) {
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consume_whitespace();
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if (lexer.consume_specific(']'))
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break;
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auto name = lexer.consume_until([](auto ch) { return ch == ']' || ch == '=' || ch == ','; });
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if (lexer.consume_specific('=')) {
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auto value = lexer.consume_until([](auto ch) { return ch == ']' || ch == ','; });
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extended_attributes.set(name, value);
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} else {
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extended_attributes.set(name, {});
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}
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lexer.consume_specific(',');
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}
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consume_whitespace();
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return extended_attributes;
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};
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for (;;) {
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HashMap<String, String> extended_attributes;
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consume_whitespace();
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if (lexer.consume_specific('}'))
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break;
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if (lexer.consume_specific('[')) {
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extended_attributes = parse_extended_attributes();
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}
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if (lexer.next_is("readonly") || lexer.next_is("attribute")) {
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parse_attribute(extended_attributes);
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continue;
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}
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parse_function(extended_attributes);
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}
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interface->wrapper_class = String::format("%sWrapper", interface->name.characters());
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interface->wrapper_base_class = String::format("%sWrapper", interface->parent_name.is_empty() ? "" : interface->parent_name.characters());
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return interface;
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}
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}
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static void generate_header(const IDL::Interface&);
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static void generate_implementation(const IDL::Interface&);
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int main(int argc, char** argv)
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{
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Core::ArgsParser args_parser;
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const char* path = nullptr;
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bool header_mode = false;
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bool implementation_mode = false;
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args_parser.add_option(header_mode, "Generate the wrapper .h file", "header", 'H');
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args_parser.add_option(implementation_mode, "Generate the wrapper .cpp file", "implementation", 'I');
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args_parser.add_positional_argument(path, "IDL file", "idl-file");
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args_parser.parse(argc, argv);
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auto file_or_error = Core::File::open(path, Core::IODevice::ReadOnly);
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if (file_or_error.is_error()) {
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fprintf(stderr, "Cannot open %s\n", path);
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return 1;
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}
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LexicalPath lexical_path(path);
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auto namespace_ = lexical_path.parts().at(lexical_path.parts().size() - 2);
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auto data = file_or_error.value()->read_all();
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auto interface = IDL::parse_interface(data);
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if (!interface) {
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warnln("Cannot parse {}", path);
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return 1;
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}
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if (namespace_.is_one_of("DOM", "HTML", "UIEvents", "HighResolutionTime", "SVG")) {
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StringBuilder builder;
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builder.append(namespace_);
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builder.append("::");
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builder.append(interface->name);
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interface->fully_qualified_name = builder.to_string();
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} else {
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interface->fully_qualified_name = interface->name;
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}
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#if 0
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dbg() << "Attributes:";
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for (auto& attribute : interface->attributes) {
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dbg() << " " << (attribute.readonly ? "Readonly " : "")
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<< attribute.type.name << (attribute.type.nullable ? "?" : "")
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<< " " << attribute.name;
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}
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dbg() << "Functions:";
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for (auto& function : interface->functions) {
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dbg() << " " << function.return_type.name << (function.return_type.nullable ? "?" : "")
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<< " " << function.name;
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for (auto& parameter : function.parameters) {
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dbg() << " " << parameter.type.name << (parameter.type.nullable ? "?" : "") << " " << parameter.name;
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}
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}
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#endif
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if (header_mode)
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generate_header(*interface);
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if (implementation_mode)
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generate_implementation(*interface);
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return 0;
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}
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static bool should_emit_wrapper_factory(const IDL::Interface& interface)
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{
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// FIXME: This is very hackish.
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if (interface.name == "EventTarget")
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return false;
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if (interface.name == "Node")
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return false;
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if (interface.name == "Text")
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return false;
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if (interface.name == "Document")
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return false;
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if (interface.name == "DocumentType")
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return false;
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if (interface.name.ends_with("Element"))
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return false;
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return true;
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}
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static bool is_wrappable_type(const IDL::Type& type)
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{
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if (type.name == "Node")
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return true;
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if (type.name == "Document")
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return true;
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if (type.name == "Text")
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return true;
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if (type.name == "DocumentType")
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return true;
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if (type.name.ends_with("Element"))
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return true;
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if (type.name == "ImageData")
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return true;
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return false;
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}
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static void generate_header(const IDL::Interface& interface)
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{
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StringBuilder builder;
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SourceGenerator generator { builder };
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generator.set("name", interface.name);
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generator.set("fully_qualified_name", interface.fully_qualified_name);
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generator.set("wrapper_base_class", interface.wrapper_base_class);
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generator.set("wrapper_class", interface.wrapper_class);
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generator.set("wrapper_class:snakecase", snake_name(interface.wrapper_class));
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generator.append(R"~~~(
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#pragma once
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#include <LibWeb/Bindings/Wrapper.h>
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// FIXME: This is very strange.
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#if __has_include(<LibWeb/DOM/@name@.h>)
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# include <LibWeb/DOM/@name@.h>
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#elif __has_include(<LibWeb/HTML/@name@.h>)
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# include <LibWeb/HTML/@name@.h>
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#elif __has_include(<LibWeb/UIEvents/@name@.h>)
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# include <LibWeb/UIEvents/@name@.h>
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#elif __has_include(<LibWeb/HighResolutionTime/@name@.h>)
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# include <LibWeb/HighResolutionTime/@name@.h>
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#elif __has_include(<LibWeb/SVG/@name@.h>)
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# include <LibWeb/SVG/@name@.h>
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#endif
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)~~~");
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if (interface.wrapper_base_class != "Wrapper") {
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generator.append(R"~~~(
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#include <LibWeb/Bindings/@wrapper_base_class@.h>
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)~~~");
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}
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generator.append(R"~~~(
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namespace Web::Bindings {
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class @wrapper_class@ : public @wrapper_base_class@ {
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JS_OBJECT(@wrapper_class@, @wrapper_base_class@);
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public:
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@wrapper_class@(JS::GlobalObject&, @fully_qualified_name@&);
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virtual void initialize(JS::GlobalObject&) override;
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virtual ~@wrapper_class@() override;
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)~~~");
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if (interface.wrapper_base_class == "Wrapper") {
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generator.append(R"~~~(
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@fully_qualified_name@& impl() { return *m_impl; }
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const @fully_qualified_name@& impl() const { return *m_impl; }
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)~~~");
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} else {
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generator.append(R"~~~(
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@fully_qualified_name@& impl() { return static_cast<@fully_qualified_name@&>(@wrapper_base_class@::impl()); }
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const @fully_qualified_name@& impl() const { return static_cast<const @fully_qualified_name@&>(@wrapper_base_class@::impl()); }
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)~~~");
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}
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generator.append(R"~~~(
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virtual bool is_@wrapper_class:snakecase@() const final { return true; }
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private:
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)~~~");
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for (auto& function : interface.functions) {
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auto function_generator = generator.fork();
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function_generator.set("function.name:snakecase", snake_name(function.name));
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function_generator.append(R"~~~(
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JS_DECLARE_NATIVE_FUNCTION(@function.name:snakecase@);
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)~~~");
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}
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for (auto& attribute : interface.attributes) {
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auto attribute_generator = generator.fork();
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attribute_generator.set("attribute.name:snakecase", snake_name(attribute.name));
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attribute_generator.append(R"~~~(
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JS_DECLARE_NATIVE_GETTER(@attribute.name:snakecase@_getter);
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)~~~");
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if (!attribute.readonly) {
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attribute_generator.append(R"~~~(
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JS_DECLARE_NATIVE_SETTER(@attribute.name:snakecase@_setter);
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)~~~");
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}
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}
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if (interface.wrapper_base_class == "Wrapper") {
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generator.append(R"~~~(
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NonnullRefPtr<@fully_qualified_name@> m_impl;
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)~~~");
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}
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generator.append(R"~~~(
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};
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)~~~");
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if (should_emit_wrapper_factory(interface)) {
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generator.append(R"~~~(
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@wrapper_class@* wrap(JS::GlobalObject&, @fully_qualified_name@&);
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)~~~");
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}
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generator.append(R"~~~(
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} // namespace Web::Bindings
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)~~~");
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outln("{}", generator.as_string_view());
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}
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void generate_implementation(const IDL::Interface& interface)
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{
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StringBuilder builder;
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SourceGenerator generator { builder };
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generator.set("wrapper_class", interface.wrapper_class);
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generator.set("wrapper_base_class", interface.wrapper_base_class);
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generator.set("fully_qualified_name", interface.fully_qualified_name);
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generator.append(R"~~~(
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#include <AK/FlyString.h>
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#include <LibJS/Runtime/Array.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/Function.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Uint8ClampedArray.h>
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#include <LibJS/Runtime/Value.h>
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#include <LibWeb/Bindings/@wrapper_class@.h>
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#include <LibWeb/Bindings/CanvasRenderingContext2DWrapper.h>
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#include <LibWeb/Bindings/CommentWrapper.h>
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#include <LibWeb/Bindings/DOMImplementationWrapper.h>
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#include <LibWeb/Bindings/DocumentFragmentWrapper.h>
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#include <LibWeb/Bindings/DocumentTypeWrapper.h>
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#include <LibWeb/Bindings/DocumentWrapper.h>
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#include <LibWeb/Bindings/EventTargetWrapperFactory.h>
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#include <LibWeb/Bindings/HTMLCanvasElementWrapper.h>
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#include <LibWeb/Bindings/HTMLHeadElementWrapper.h>
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#include <LibWeb/Bindings/HTMLImageElementWrapper.h>
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#include <LibWeb/Bindings/ImageDataWrapper.h>
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#include <LibWeb/Bindings/NodeWrapperFactory.h>
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#include <LibWeb/Bindings/TextWrapper.h>
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#include <LibWeb/Bindings/WindowObject.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/DOM/EventListener.h>
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#include <LibWeb/HTML/HTMLElement.h>
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#include <LibWeb/Origin.h>
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// FIXME: This is a total hack until we can figure out the namespace for a given type somehow.
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using namespace Web::DOM;
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using namespace Web::HTML;
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namespace Web::Bindings {
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)~~~");
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if (interface.wrapper_base_class == "Wrapper") {
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generator.append(R"~~~(
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@wrapper_class@::@wrapper_class@(JS::GlobalObject& global_object, @fully_qualified_name@& impl)
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: Wrapper(*global_object.object_prototype())
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, m_impl(impl)
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{
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}
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)~~~");
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} else {
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generator.append(R"~~~(
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@wrapper_class@::@wrapper_class@(JS::GlobalObject& global_object, @fully_qualified_name@& impl)
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: @wrapper_base_class@(global_object, impl)
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{
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}
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)~~~");
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}
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generator.append(R"~~~(
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void @wrapper_class@::initialize(JS::GlobalObject& global_object)
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{
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[[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable | JS::Attribute::Configurable;
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@wrapper_base_class@::initialize(global_object);
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)~~~");
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for (auto& attribute : interface.attributes) {
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auto attribute_generator = generator.fork();
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attribute_generator.set("attribute.name", attribute.name);
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attribute_generator.set("attribute.getter_callback", attribute.getter_callback_name);
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if (attribute.readonly)
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attribute_generator.set("attribute.setter_callback", "nullptr");
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else
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attribute_generator.set("attribute.setter_callback", attribute.setter_callback_name);
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attribute_generator.append(R"~~~(
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define_native_property("@attribute.name@", @attribute.getter_callback@, @attribute.setter_callback@, default_attributes);
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)~~~");
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}
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for (auto& function : interface.functions) {
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auto function_generator = generator.fork();
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function_generator.set("function.name", function.name);
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function_generator.set("function.name:snakecase", snake_name(function.name));
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function_generator.set("function.name:length", String::number(function.name.length()));
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function_generator.append(R"~~~(
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define_native_function("@function.name@", @function.name:snakecase@, @function.name:length@, default_attributes);
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)~~~");
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}
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generator.append(R"~~~(
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}
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@wrapper_class@::~@wrapper_class@()
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{
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}
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)~~~");
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if (!interface.attributes.is_empty() || !interface.functions.is_empty()) {
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generator.append(R"~~~(
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static @fully_qualified_name@* impl_from(JS::VM& vm, JS::GlobalObject& global_object)
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{
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auto* this_object = vm.this_value(global_object).to_object(global_object);
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if (!this_object)
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return {};
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if (!this_object->inherits("@wrapper_class@")) {
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vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "@fully_qualified_name@");
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return nullptr;
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}
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return &static_cast<@wrapper_class@*>(this_object)->impl();
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}
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)~~~");
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}
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auto generate_to_cpp = [&](auto& parameter, auto& js_name, const auto& js_suffix, auto cpp_name, bool return_void = false, bool legacy_null_to_empty_string = false, bool optional = false) {
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auto scoped_generator = generator.fork();
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scoped_generator.set("cpp_name", cpp_name);
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scoped_generator.set("js_name", js_name);
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scoped_generator.set("js_suffix", js_suffix);
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scoped_generator.set("legacy_null_to_empty_string", legacy_null_to_empty_string ? "true" : "false");
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scoped_generator.set("parameter.type.name", parameter.type.name);
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if (return_void)
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scoped_generator.set("return_statement", "return;");
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else
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scoped_generator.set("return_statement", "return {};");
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// FIXME: Add support for optional to all types
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if (parameter.type.name == "DOMString") {
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if (!optional) {
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scoped_generator.append(R"~~~(
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auto @cpp_name@ = @js_name@@js_suffix@.to_string(global_object, @legacy_null_to_empty_string@);
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if (vm.exception())
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@return_statement@
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)~~~");
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} else {
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scoped_generator.append(R"~~~(
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String @cpp_name@;
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if (!@js_name@@js_suffix@.is_undefined()) {
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@cpp_name@ = @js_name@@js_suffix@.to_string(global_object, @legacy_null_to_empty_string@);
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if (vm.exception())
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@return_statement@
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}
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)~~~");
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}
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} else if (parameter.type.name == "EventListener") {
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scoped_generator.append(R"~~~(
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if (!@js_name@@js_suffix@.is_function()) {
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vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "Function");
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@return_statement@
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}
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auto @cpp_name@ = adopt(*new EventListener(JS::make_handle(&@js_name@@js_suffix@.as_function())));
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)~~~");
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} else if (is_wrappable_type(parameter.type)) {
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scoped_generator.append(R"~~~(
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auto @cpp_name@_object = @js_name@@js_suffix@.to_object(global_object);
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if (vm.exception())
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@return_statement@
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if (!@cpp_name@_object->inherits("@parameter.type.name@Wrapper")) {
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vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "@parameter.type.name@");
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@return_statement@
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}
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auto& @cpp_name@ = static_cast<@parameter.type.name@Wrapper*>(@cpp_name@_object)->impl();
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)~~~");
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} else if (parameter.type.name == "double") {
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scoped_generator.append(R"~~~(
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auto @cpp_name@ = @js_name@@js_suffix@.to_double(global_object);
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if (vm.exception())
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@return_statement@
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)~~~");
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} else if (parameter.type.name == "boolean") {
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scoped_generator.append(R"~~~(
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auto @cpp_name@ = @js_name@@js_suffix@.to_boolean();
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)~~~");
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} else {
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dbgln("Unimplemented JS-to-C++ conversion: {}", parameter.type.name);
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ASSERT_NOT_REACHED();
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}
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};
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auto generate_arguments = [&](auto& parameters, auto& arguments_builder, bool return_void = false) {
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auto arguments_generator = generator.fork();
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Vector<String> parameter_names;
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size_t argument_index = 0;
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for (auto& parameter : parameters) {
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parameter_names.append(snake_name(parameter.name));
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arguments_generator.set("argument.index", String::number(argument_index));
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arguments_generator.append(R"~~~(
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auto arg@argument.index@ = vm.argument(@argument.index@);
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)~~~");
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// FIXME: Parameters can have [LegacyNullToEmptyString] attached.
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generate_to_cpp(parameter, "arg", String::number(argument_index), snake_name(parameter.name), return_void, false, parameter.optional);
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++argument_index;
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}
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arguments_builder.join(", ", parameter_names);
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};
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auto generate_return_statement = [&](auto& return_type) {
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auto scoped_generator = generator.fork();
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scoped_generator.set("return_type", return_type.name);
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if (return_type.name == "void") {
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scoped_generator.append(R"~~~(
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return JS::js_undefined();
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)~~~");
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return;
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}
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if (return_type.nullable) {
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if (return_type.name == "DOMString") {
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scoped_generator.append(R"~~~(
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if (retval.is_null())
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return JS::js_null();
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)~~~");
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} else {
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scoped_generator.append(R"~~~(
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if (!retval)
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return JS::js_null();
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)~~~");
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}
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}
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if (return_type.name == "DOMString") {
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scoped_generator.append(R"~~~(
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return JS::js_string(vm, retval);
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)~~~");
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} else if (return_type.name == "ArrayFromVector") {
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// FIXME: Remove this fake type hack once it's no longer needed.
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// Basically once we have NodeList we can throw this out.
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scoped_generator.append(R"~~~(
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auto* new_array = JS::Array::create(global_object);
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for (auto& element : retval)
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new_array->indexed_properties().append(wrap(global_object, element));
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return new_array;
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)~~~");
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} else if (return_type.name == "long" || return_type.name == "double" || return_type.name == "boolean" || return_type.name == "short") {
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scoped_generator.append(R"~~~(
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return JS::Value(retval);
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)~~~");
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} else if (return_type.name == "Uint8ClampedArray") {
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scoped_generator.append(R"~~~(
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return retval;
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)~~~");
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} else {
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scoped_generator.append(R"~~~(
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return wrap(global_object, const_cast<@return_type@&>(*retval));
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)~~~");
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}
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};
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for (auto& attribute : interface.attributes) {
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auto attribute_generator = generator.fork();
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attribute_generator.set("attribute.getter_callback", attribute.getter_callback_name);
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attribute_generator.set("attribute.setter_callback", attribute.setter_callback_name);
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attribute_generator.set("attribute.name:snakecase", snake_name(attribute.name));
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if (attribute.extended_attributes.contains("Reflect")) {
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auto attribute_name = attribute.extended_attributes.get("Reflect").value();
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if (attribute_name.is_null())
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attribute_name = attribute.name;
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attribute_name = make_input_acceptable_cpp(attribute_name);
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attribute_generator.set("attribute.reflect_name", attribute_name);
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} else {
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attribute_generator.set("attribute.reflect_name", snake_name(attribute.name));
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}
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attribute_generator.append(R"~~~(
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JS_DEFINE_NATIVE_GETTER(@wrapper_class@::@attribute.getter_callback@)
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{
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auto* impl = impl_from(vm, global_object);
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if (!impl)
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return {};
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)~~~");
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if (attribute.extended_attributes.contains("ReturnNullIfCrossOrigin")) {
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attribute_generator.append(R"~~~(
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if (!impl->may_access_from_origin(static_cast<WindowObject&>(global_object).origin()))
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return JS::js_null();
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)~~~");
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}
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if (attribute.extended_attributes.contains("Reflect")) {
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if (attribute.type.name != "boolean") {
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attribute_generator.append(R"~~~(
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auto retval = impl->attribute(HTML::AttributeNames::@attribute.reflect_name@);
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)~~~");
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} else {
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attribute_generator.append(R"~~~(
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auto retval = impl->has_attribute(HTML::AttributeNames::@attribute.reflect_name@);
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)~~~");
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}
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} else {
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attribute_generator.append(R"~~~(
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auto retval = impl->@attribute.name:snakecase@();
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)~~~");
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}
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generate_return_statement(attribute.type);
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attribute_generator.append(R"~~~(
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}
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)~~~");
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if (!attribute.readonly) {
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attribute_generator.append(R"~~~(
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JS_DEFINE_NATIVE_SETTER(@wrapper_class@::@attribute.setter_callback@)
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{
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auto* impl = impl_from(vm, global_object);
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if (!impl)
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return;
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)~~~");
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generate_to_cpp(attribute, "value", "", "cpp_value", true, attribute.extended_attributes.contains("LegacyNullToEmptyString"));
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if (attribute.extended_attributes.contains("Reflect")) {
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if (attribute.type.name != "boolean") {
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attribute_generator.append(R"~~~(
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impl->set_attribute(HTML::AttributeNames::@attribute.reflect_name@, cpp_value);
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)~~~");
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} else {
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attribute_generator.append(R"~~~(
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if (!cpp_value)
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impl->remove_attribute(HTML::AttributeNames::@attribute.reflect_name@);
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else
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impl->set_attribute(HTML::AttributeNames::@attribute.reflect_name@, String::empty());
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)~~~");
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}
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} else {
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attribute_generator.append(R"~~~(
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impl->set_@attribute.name:snakecase@(cpp_value);
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)~~~");
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}
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attribute_generator.append(R"~~~(
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}
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)~~~");
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}
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}
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// Implementation: Functions
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for (auto& function : interface.functions) {
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auto function_generator = generator.fork();
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function_generator.set("function.name", function.name);
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function_generator.set("function.name:snakecase", snake_name(function.name));
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function_generator.set("function.nargs", String::number(function.length()));
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function_generator.append(R"~~~(\
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JS_DEFINE_NATIVE_FUNCTION(@wrapper_class@::@function.name:snakecase@)
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{
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auto* impl = impl_from(vm, global_object);
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if (!impl)
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return {};
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)~~~");
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if (function.length() > 0) {
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if (function.length() == 1) {
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function_generator.set(".bad_arg_count", "JS::ErrorType::BadArgCountOne");
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function_generator.set(".arg_count_suffix", "");
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} else {
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function_generator.set(".bad_arg_count", "JS::ErrorType::BadArgCountMany");
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function_generator.set(".arg_count_suffix", String::formatted(", \"{}\"", function.length()));
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}
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function_generator.append(R"~~~(
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if (vm.argument_count() < @function.nargs@) {
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vm.throw_exception<JS::TypeError>(global_object, @.bad_arg_count@, "@function.name@"@.arg_count_suffix@);
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return {};
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}
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)~~~");
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}
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StringBuilder arguments_builder;
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generate_arguments(function.parameters, arguments_builder);
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function_generator.set(".arguments", arguments_builder.string_view());
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if (function.return_type.name != "void") {
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function_generator.append(R"~~~(
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auto retval = impl->@function.name:snakecase@(@.arguments@);
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)~~~");
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} else {
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function_generator.append(R"~~~(
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impl->@function.name:snakecase@(@.arguments@);
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)~~~");
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}
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generate_return_statement(function.return_type);
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function_generator.append(R"~~~(
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}
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)~~~");
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}
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if (should_emit_wrapper_factory(interface)) {
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generator.append(R"~~~(
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@wrapper_class@* wrap(JS::GlobalObject& global_object, @fully_qualified_name@& impl)
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{
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return static_cast<@wrapper_class@*>(wrap_impl(global_object, impl));
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}
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)~~~");
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}
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generator.append(R"~~~(
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} // namespace Web::Bindings
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)~~~");
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outln("{}", generator.as_string_view());
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}
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