mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 15:40:19 +00:00
d74ad81402
The addition of assert functions to Userland/js was done before we had load(..) implemented. Now that it exists, it seems like the right move the test helper functions to pure javascript instead of poluting js with random global functions.
660 lines
24 KiB
C++
660 lines
24 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/NonnullOwnPtr.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 <LibJS/AST.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/Parser.h>
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#include <LibJS/Runtime/Array.h>
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#include <LibJS/Runtime/Date.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/Object.h>
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#include <LibJS/Runtime/PrimitiveString.h>
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#include <LibJS/Runtime/Shape.h>
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#include <LibJS/Runtime/Value.h>
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#include <LibLine/Editor.h>
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#include <signal.h>
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#include <stdio.h>
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Vector<String> repl_statements;
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class ReplObject : public JS::GlobalObject {
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public:
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ReplObject();
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virtual ~ReplObject() override;
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static JS::Value load_file(JS::Interpreter&);
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private:
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virtual const char* class_name() const override { return "ReplObject"; }
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static JS::Value exit_interpreter(JS::Interpreter&);
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static JS::Value repl_help(JS::Interpreter&);
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static JS::Value save_to_file(JS::Interpreter&);
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};
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bool dump_ast = false;
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bool print_last_result = false;
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static OwnPtr<Line::Editor> editor;
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static int repl_line_level = 0;
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static String prompt_for_level(int level)
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{
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static StringBuilder prompt_builder;
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prompt_builder.clear();
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prompt_builder.append("> ");
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for (auto i = 0; i < level; ++i)
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prompt_builder.append(" ");
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return prompt_builder.build();
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}
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String read_next_piece()
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{
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StringBuilder piece;
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do {
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String line = editor->get_line(prompt_for_level(repl_line_level));
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editor->add_to_history(line);
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piece.append(line);
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auto lexer = JS::Lexer(line);
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for (JS::Token token = lexer.next(); token.type() != JS::TokenType::Eof; token = lexer.next()) {
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switch (token.type()) {
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case JS::TokenType::BracketOpen:
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case JS::TokenType::CurlyOpen:
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case JS::TokenType::ParenOpen:
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repl_line_level++;
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break;
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case JS::TokenType::BracketClose:
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case JS::TokenType::CurlyClose:
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case JS::TokenType::ParenClose:
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repl_line_level--;
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break;
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default:
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break;
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}
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}
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} while (repl_line_level > 0);
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return piece.to_string();
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}
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static void print_value(JS::Value value, HashTable<JS::Object*>& seen_objects);
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static void print_array(const JS::Array& array, HashTable<JS::Object*>& seen_objects)
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{
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fputs("[ ", stdout);
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for (size_t i = 0; i < array.elements().size(); ++i) {
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print_value(array.elements()[i], seen_objects);
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if (i != array.elements().size() - 1)
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fputs(", ", stdout);
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}
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fputs(" ]", stdout);
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}
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static void print_object(const JS::Object& object, HashTable<JS::Object*>& seen_objects)
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{
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fputs("{ ", stdout);
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for (size_t i = 0; i < object.elements().size(); ++i) {
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if (object.elements()[i].is_empty())
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continue;
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printf("\"\033[33;1m%zu\033[0m\": ", i);
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print_value(object.elements()[i], seen_objects);
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if (i != object.elements().size() - 1)
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fputs(", ", stdout);
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}
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if (!object.elements().is_empty() && object.shape().property_count())
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fputs(", ", stdout);
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size_t index = 0;
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for (auto& it : object.shape().property_table()) {
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printf("\"\033[33;1m%s\033[0m\": ", it.key.characters());
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print_value(object.get_direct(it.value.offset), seen_objects);
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if (index != object.shape().property_count() - 1)
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fputs(", ", stdout);
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++index;
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}
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fputs(" }", stdout);
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}
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static void print_function(const JS::Object& function, HashTable<JS::Object*>&)
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{
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printf("\033[34;1m[%s]\033[0m", function.class_name());
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}
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static void print_date(const JS::Object& date, HashTable<JS::Object*>&)
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{
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printf("\033[34;1mDate %s\033[0m", static_cast<const JS::Date&>(date).string().characters());
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}
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static void print_error(const JS::Object& object, HashTable<JS::Object*>&)
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{
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auto& error = static_cast<const JS::Error&>(object);
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printf("\033[34;1m[%s]\033[0m", error.name().characters());
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if (!error.message().is_empty())
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printf(": %s", error.message().characters());
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}
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void print_value(JS::Value value, HashTable<JS::Object*>& seen_objects)
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{
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if (value.is_empty()) {
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printf("\033[34;1m<empty>\033[0m");
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return;
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}
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if (value.is_object()) {
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if (seen_objects.contains(&value.as_object())) {
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// FIXME: Maybe we should only do this for circular references,
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// not for all reoccurring objects.
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printf("<already printed Object %p>", &value.as_object());
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return;
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}
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seen_objects.set(&value.as_object());
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}
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if (value.is_array())
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return print_array(static_cast<const JS::Array&>(value.as_object()), seen_objects);
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if (value.is_object()) {
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auto& object = value.as_object();
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if (object.is_function())
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return print_function(object, seen_objects);
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if (object.is_date())
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return print_date(object, seen_objects);
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if (object.is_error())
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return print_error(object, seen_objects);
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return print_object(object, seen_objects);
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}
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if (value.is_string())
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printf("\033[31;1m");
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else if (value.is_number())
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printf("\033[35;1m");
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else if (value.is_boolean())
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printf("\033[32;1m");
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else if (value.is_null())
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printf("\033[33;1m");
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else if (value.is_undefined())
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printf("\033[34;1m");
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if (value.is_string())
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putchar('"');
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printf("%s", value.to_string().characters());
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if (value.is_string())
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putchar('"');
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printf("\033[0m");
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}
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static void print(JS::Value value)
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{
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HashTable<JS::Object*> seen_objects;
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print_value(value, seen_objects);
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putchar('\n');
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}
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bool file_has_shebang(AK::ByteBuffer file_contents)
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{
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if (file_contents.size() >= 2 && file_contents[0] == '#' && file_contents[1] == '!')
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return true;
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return false;
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}
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StringView strip_shebang(AK::ByteBuffer file_contents)
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{
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size_t i = 0;
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for (i = 2; i < file_contents.size(); ++i) {
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if (file_contents[i] == '\n')
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break;
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}
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return StringView((const char*)file_contents.data() + i, file_contents.size() - i);
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}
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bool write_to_file(const StringView& path)
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{
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int fd = open_with_path_length(path.characters_without_null_termination(), path.length(), O_WRONLY | O_CREAT | O_TRUNC, 0666);
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for (size_t i = 0; i < repl_statements.size(); i++) {
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auto line = repl_statements[i];
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if (line.length() && i != repl_statements.size() - 1) {
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ssize_t nwritten = write(fd, line.characters(), line.length());
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if (nwritten < 0) {
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close(fd);
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return false;
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}
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}
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if (i != repl_statements.size() - 1) {
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char ch = '\n';
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ssize_t nwritten = write(fd, &ch, 1);
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if (nwritten != 1) {
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perror("write");
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close(fd);
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return false;
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}
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}
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}
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close(fd);
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return true;
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}
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ReplObject::ReplObject()
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{
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put_native_function("exit", exit_interpreter);
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put_native_function("help", repl_help);
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put_native_function("load", load_file, 1);
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put_native_function("save", save_to_file, 1);
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}
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ReplObject::~ReplObject()
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{
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}
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JS::Value ReplObject::save_to_file(JS::Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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return JS::Value(false);
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String save_path = interpreter.argument(0).to_string();
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StringView path = StringView(save_path.characters());
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if (write_to_file(path)) {
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return JS::Value(true);
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}
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return JS::Value(false);
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}
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JS::Value ReplObject::exit_interpreter(JS::Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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exit(0);
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int exit_code = interpreter.argument(0).to_number().as_double();
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exit(exit_code);
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return JS::js_undefined();
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}
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JS::Value ReplObject::repl_help(JS::Interpreter&)
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{
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printf("REPL commands:\n");
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printf(" exit(code): exit the REPL with specified code. Defaults to 0.\n");
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printf(" help(): display this menu\n");
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printf(" load(files): Accepts file names as params to load into running session. For example load(\"js/1.js\", \"js/2.js\", \"js/3.js\")\n");
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return JS::js_undefined();
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}
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JS::Value ReplObject::load_file(JS::Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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return JS::Value(false);
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for (auto& file : interpreter.call_frame().arguments) {
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String file_name = file.as_string()->string();
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auto js_file = Core::File::construct(file_name);
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if (!js_file->open(Core::IODevice::ReadOnly)) {
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fprintf(stderr, "Failed to open %s: %s\n", file_name.characters(), js_file->error_string());
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}
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auto file_contents = js_file->read_all();
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StringView source;
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if (file_has_shebang(file_contents)) {
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source = strip_shebang(file_contents);
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} else {
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source = file_contents;
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}
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auto parser = JS::Parser(JS::Lexer(source));
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auto program = parser.parse_program();
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if (dump_ast)
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program->dump(0);
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if (parser.has_errors())
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continue;
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interpreter.run(*program);
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if (print_last_result)
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print(interpreter.last_value());
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}
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return JS::Value(true);
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}
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void repl(JS::Interpreter& interpreter)
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{
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while (true) {
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String piece = read_next_piece();
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if (piece.is_empty())
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continue;
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repl_statements.append(piece);
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auto parser = JS::Parser(JS::Lexer(piece));
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auto program = parser.parse_program();
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if (dump_ast)
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program->dump(0);
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if (parser.has_errors()) {
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printf("Parse error\n");
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continue;
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}
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interpreter.run(*program);
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if (interpreter.exception()) {
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printf("Uncaught exception: ");
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print(interpreter.exception()->value());
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interpreter.clear_exception();
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} else {
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print(interpreter.last_value());
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}
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}
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}
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void enable_test_mode(JS::Interpreter& interpreter)
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{
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interpreter.global_object().put_native_function("load", ReplObject::load_file);
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}
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int main(int argc, char** argv)
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{
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bool gc_on_every_allocation = false;
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bool syntax_highlight = false;
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bool test_mode = false;
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const char* script_path = nullptr;
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Core::ArgsParser args_parser;
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args_parser.add_option(dump_ast, "Dump the AST", "dump-ast", 'A');
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args_parser.add_option(print_last_result, "Print last result", "print-last-result", 'l');
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args_parser.add_option(gc_on_every_allocation, "GC on every allocation", "gc-on-every-allocation", 'g');
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args_parser.add_option(syntax_highlight, "Enable live syntax highlighting", "syntax-highlight", 's');
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args_parser.add_option(test_mode, "Run the interpreter with added functionality for the test harness", "test-mode", 't');
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args_parser.add_positional_argument(script_path, "Path to script file", "script", Core::ArgsParser::Required::No);
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args_parser.parse(argc, argv);
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if (script_path == nullptr) {
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auto interpreter = JS::Interpreter::create<ReplObject>();
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interpreter->heap().set_should_collect_on_every_allocation(gc_on_every_allocation);
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if (test_mode)
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enable_test_mode(*interpreter);
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editor = make<Line::Editor>();
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signal(SIGINT, [](int) {
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editor->interrupted();
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});
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signal(SIGWINCH, [](int) {
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editor->resized();
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});
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editor->initialize();
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editor->on_display_refresh = [syntax_highlight](Line::Editor& editor) {
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auto stylize = [&](Line::Span span, Line::Style styles) {
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if (syntax_highlight)
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editor.stylize(span, styles);
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};
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editor.strip_styles();
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StringBuilder builder;
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builder.append({ editor.buffer().data(), editor.buffer().size() });
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// FIXME: The lexer returns weird position information without this
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builder.append(" ");
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String str = builder.build();
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size_t open_indents = repl_line_level;
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JS::Lexer lexer(str, false);
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bool indenters_starting_line = true;
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for (JS::Token token = lexer.next(); token.type() != JS::TokenType::Eof; token = lexer.next()) {
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auto length = token.value().length();
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auto start = token.line_column() - 2;
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auto end = start + length;
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if (indenters_starting_line) {
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if (token.type() != JS::TokenType::ParenClose && token.type() != JS::TokenType::BracketClose && token.type() != JS::TokenType::CurlyClose) {
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indenters_starting_line = false;
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} else {
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--open_indents;
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}
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}
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switch (token.type()) {
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case JS::TokenType::Invalid:
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case JS::TokenType::Eof:
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stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Red), Line::Style::Underline });
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break;
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case JS::TokenType::NumericLiteral:
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stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Magenta) });
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break;
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case JS::TokenType::StringLiteral:
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case JS::TokenType::RegexLiteral:
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case JS::TokenType::UnterminatedStringLiteral:
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stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Red) });
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break;
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case JS::TokenType::BracketClose:
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case JS::TokenType::BracketOpen:
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case JS::TokenType::Caret:
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case JS::TokenType::Comma:
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case JS::TokenType::CurlyClose:
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case JS::TokenType::CurlyOpen:
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case JS::TokenType::ParenClose:
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case JS::TokenType::ParenOpen:
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case JS::TokenType::Semicolon:
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case JS::TokenType::Period:
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break;
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case JS::TokenType::Ampersand:
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case JS::TokenType::AmpersandEquals:
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case JS::TokenType::Asterisk:
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case JS::TokenType::AsteriskAsteriskEquals:
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case JS::TokenType::AsteriskEquals:
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case JS::TokenType::DoubleAmpersand:
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case JS::TokenType::DoubleAsterisk:
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case JS::TokenType::DoublePipe:
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case JS::TokenType::DoubleQuestionMark:
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case JS::TokenType::Equals:
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case JS::TokenType::EqualsEquals:
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case JS::TokenType::EqualsEqualsEquals:
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case JS::TokenType::ExclamationMark:
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case JS::TokenType::ExclamationMarkEquals:
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case JS::TokenType::ExclamationMarkEqualsEquals:
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case JS::TokenType::GreaterThan:
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case JS::TokenType::GreaterThanEquals:
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case JS::TokenType::LessThan:
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case JS::TokenType::LessThanEquals:
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case JS::TokenType::Minus:
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case JS::TokenType::MinusEquals:
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case JS::TokenType::MinusMinus:
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case JS::TokenType::Percent:
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case JS::TokenType::PercentEquals:
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case JS::TokenType::Pipe:
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case JS::TokenType::PipeEquals:
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case JS::TokenType::Plus:
|
|
case JS::TokenType::PlusEquals:
|
|
case JS::TokenType::PlusPlus:
|
|
case JS::TokenType::QuestionMark:
|
|
case JS::TokenType::QuestionMarkPeriod:
|
|
case JS::TokenType::ShiftLeft:
|
|
case JS::TokenType::ShiftLeftEquals:
|
|
case JS::TokenType::ShiftRight:
|
|
case JS::TokenType::ShiftRightEquals:
|
|
case JS::TokenType::Slash:
|
|
case JS::TokenType::SlashEquals:
|
|
case JS::TokenType::Tilde:
|
|
case JS::TokenType::UnsignedShiftRight:
|
|
case JS::TokenType::UnsignedShiftRightEquals:
|
|
stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Magenta) });
|
|
break;
|
|
case JS::TokenType::NullLiteral:
|
|
stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Yellow), Line::Style::Bold });
|
|
break;
|
|
case JS::TokenType::BoolLiteral:
|
|
stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Green), Line::Style::Bold });
|
|
break;
|
|
case JS::TokenType::Class:
|
|
case JS::TokenType::Const:
|
|
case JS::TokenType::Delete:
|
|
case JS::TokenType::Function:
|
|
case JS::TokenType::In:
|
|
case JS::TokenType::Instanceof:
|
|
case JS::TokenType::Interface:
|
|
case JS::TokenType::Let:
|
|
case JS::TokenType::New:
|
|
case JS::TokenType::Throw:
|
|
case JS::TokenType::Typeof:
|
|
case JS::TokenType::Var:
|
|
case JS::TokenType::Void:
|
|
stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Blue), Line::Style::Bold });
|
|
break;
|
|
case JS::TokenType::Await:
|
|
case JS::TokenType::Case:
|
|
case JS::TokenType::Catch:
|
|
case JS::TokenType::Do:
|
|
case JS::TokenType::Else:
|
|
case JS::TokenType::Finally:
|
|
case JS::TokenType::For:
|
|
case JS::TokenType::If:
|
|
case JS::TokenType::Return:
|
|
case JS::TokenType::Switch:
|
|
case JS::TokenType::Try:
|
|
case JS::TokenType::While:
|
|
case JS::TokenType::Yield:
|
|
stylize({ start, end }, { Line::Style::Foreground(Line::Style::Color::Cyan), Line::Style::Italic });
|
|
break;
|
|
case JS::TokenType::Identifier:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
editor.set_prompt(prompt_for_level(open_indents));
|
|
};
|
|
|
|
auto complete = [&interpreter, &editor = *editor](const String& token) -> Vector<String> {
|
|
if (token.length() == 0)
|
|
return {}; // nyeh
|
|
|
|
StringView line { editor.buffer().data(), editor.cursor() };
|
|
// we're only going to complete either
|
|
// - <N>
|
|
// where N is part of the name of a variable
|
|
// - <N>.<P>
|
|
// where N is the complete name of a variable and
|
|
// P is part of the name of one of its properties
|
|
Vector<String> results;
|
|
|
|
Function<void(const JS::Shape&, const StringView&)> list_all_properties = [&results, &list_all_properties](const JS::Shape& shape, auto& property_pattern) {
|
|
for (const auto& descriptor : shape.property_table()) {
|
|
if (descriptor.value.attributes & JS::Attribute::Enumerable) {
|
|
if (descriptor.key.view().starts_with(property_pattern)) {
|
|
auto completion = descriptor.key;
|
|
if (!results.contains_slow(completion)) { // hide duplicates
|
|
results.append(completion);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (const auto* prototype = shape.prototype()) {
|
|
list_all_properties(prototype->shape(), property_pattern);
|
|
}
|
|
};
|
|
|
|
if (token.contains(".")) {
|
|
auto parts = token.split('.', true);
|
|
// refuse either `.` or `a.b.c`
|
|
if (parts.size() > 2 || parts.size() == 0)
|
|
return {};
|
|
|
|
auto name = parts[0];
|
|
auto property_pattern = parts[1];
|
|
|
|
auto maybe_variable = interpreter->get_variable(name);
|
|
if (!maybe_variable.has_value()) {
|
|
maybe_variable = interpreter->global_object().get(name);
|
|
if (!maybe_variable.has_value())
|
|
return {};
|
|
}
|
|
|
|
const auto& variable = maybe_variable.value();
|
|
if (!variable.is_object())
|
|
return {};
|
|
|
|
const auto* object = variable.to_object(interpreter->heap());
|
|
const auto& shape = object->shape();
|
|
list_all_properties(shape, property_pattern);
|
|
if (results.size())
|
|
editor.suggest(property_pattern.length());
|
|
return results;
|
|
}
|
|
const auto& variable = interpreter->global_object();
|
|
list_all_properties(variable.shape(), token);
|
|
if (results.size())
|
|
editor.suggest(token.length());
|
|
return results;
|
|
};
|
|
editor->on_tab_complete_first_token = [complete](auto& value) { return complete(value); };
|
|
editor->on_tab_complete_other_token = [complete](auto& value) { return complete(value); };
|
|
repl(*interpreter);
|
|
} else {
|
|
auto interpreter = JS::Interpreter::create<JS::GlobalObject>();
|
|
interpreter->heap().set_should_collect_on_every_allocation(gc_on_every_allocation);
|
|
if (test_mode)
|
|
enable_test_mode(*interpreter);
|
|
|
|
auto file = Core::File::construct(script_path);
|
|
if (!file->open(Core::IODevice::ReadOnly)) {
|
|
fprintf(stderr, "Failed to open %s: %s\n", script_path, file->error_string());
|
|
return 1;
|
|
}
|
|
auto file_contents = file->read_all();
|
|
|
|
StringView source;
|
|
if (file_has_shebang(file_contents)) {
|
|
source = strip_shebang(file_contents);
|
|
} else {
|
|
source = file_contents;
|
|
}
|
|
auto parser = JS::Parser(JS::Lexer(source));
|
|
auto program = parser.parse_program();
|
|
|
|
if (dump_ast)
|
|
program->dump(0);
|
|
|
|
if (parser.has_errors()) {
|
|
printf("Parse Error\n");
|
|
return 1;
|
|
}
|
|
|
|
auto result = interpreter->run(*program);
|
|
|
|
if (interpreter->exception()) {
|
|
printf("Uncaught exception: ");
|
|
print(interpreter->exception()->value());
|
|
interpreter->clear_exception();
|
|
return 1;
|
|
}
|
|
if (print_last_result)
|
|
print(result);
|
|
}
|
|
|
|
return 0;
|
|
}
|