LibJS: Start implementing Date :^)

This adds:

- A global Date object (with `length` property and `now` function)
- The Date constructor (no arguments yet)
- The Date prototype (with `get*` functions)

Libraries/LibJS/Runtime/Date.cpp

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibCore/DateTime.h>
+#include <LibJS/Interpreter.h>
+#include <LibJS/Runtime/Date.h>
+
+namespace JS {
+
+Date::Date(Core::DateTime datetime, u16 milliseconds)
+    : m_datetime(datetime)
+    , m_milliseconds(milliseconds)
+{
+    set_prototype(interpreter().date_prototype());
+}
+
+Date::~Date()
+{
+}
+
+}

Libraries/LibJS/Runtime/Date.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibCore/DateTime.h>
+#include <LibJS/Runtime/Object.h>
+
+namespace JS {
+
+class Date final : public Object {
+public:
+    Date(Core::DateTime datetime, u16 milliseconds);
+    virtual ~Date() override;
+
+    Core::DateTime& datetime() { return m_datetime; }
+    u16 milliseconds() { return m_milliseconds; }
+    virtual Value value_of() const override
+    {
+        return Value(static_cast<double>(m_datetime.timestamp() * 1000 + m_milliseconds));
+    }
+
+private:
+    virtual bool is_date() const final { return true; }
+    virtual const char* class_name() const override { return "Date"; }
+
+    Core::DateTime m_datetime;
+    u16 m_milliseconds;
+};
+
+}

Libraries/LibJS/Runtime/DateConstructor.cpp

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibCore/DateTime.h>
+#include <LibJS/Interpreter.h>
+#include <LibJS/Runtime/Date.h>
+#include <LibJS/Runtime/DateConstructor.h>
+#include <sys/time.h>
+#include <time.h>
+
+namespace JS {
+
+DateConstructor::DateConstructor()
+{
+    put("prototype", interpreter().date_prototype());
+    put("length", Value(7));
+
+    put_native_function("now", now);
+}
+
+DateConstructor::~DateConstructor()
+{
+}
+
+Value DateConstructor::call(Interpreter& interpreter)
+{
+    // TODO: Support args
+    struct timeval tv;
+    gettimeofday(&tv, nullptr);
+    auto datetime = Core::DateTime::now();
+    auto milliseconds = static_cast<u16>(tv.tv_usec / 1000);
+    return interpreter.heap().allocate<Date>(datetime, milliseconds);
+}
+
+Value DateConstructor::now(Interpreter&)
+{
+    struct timeval tv;
+    gettimeofday(&tv, nullptr);
+    return Value(tv.tv_sec * 1000.0 + tv.tv_usec / 1000.0);
+}
+
+}

Libraries/LibJS/Runtime/DateConstructor.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibJS/Runtime/NativeFunction.h>
+
+namespace JS {
+
+class DateConstructor final : public NativeFunction {
+public:
+    DateConstructor();
+    virtual ~DateConstructor() override;
+
+    virtual Value call(Interpreter&) override;
+
+private:
+    virtual const char* class_name() const override { return "DateConstructor"; }
+
+    static Value now(Interpreter&);
+};
+
+}

Libraries/LibJS/Runtime/DatePrototype.cpp

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/Function.h>
+#include <AK/String.h>
+#include <LibCore/DateTime.h>
+#include <LibJS/Interpreter.h>
+#include <LibJS/Runtime/Date.h>
+#include <LibJS/Runtime/DatePrototype.h>
+#include <LibJS/Runtime/Error.h>
+#include <LibJS/Runtime/Value.h>
+
+namespace JS {
+
+static Date* this_date_from_interpreter(Interpreter& interpreter)
+{
+    auto* this_object = interpreter.this_value().to_object(interpreter.heap());
+    if (!this_object)
+        return nullptr;
+    if (!this_object->is_date()) {
+        interpreter.throw_exception<Error>("TypeError", "object must be of type Date");
+        return nullptr;
+    }
+    return static_cast<Date*>(this_object);
+}
+
+DatePrototype::DatePrototype()
+{
+    put_native_function("getDate", get_date);
+    put_native_function("getDay", get_day);
+    put_native_function("getFullYear", get_full_year);
+    put_native_function("getHours", get_hours);
+    put_native_function("getMilliseconds", get_milliseconds);
+    put_native_function("getMinutes", get_minutes);
+    put_native_function("getMonth", get_month);
+    put_native_function("getSeconds", get_seconds);
+    put_native_function("getTime", get_time);
+}
+
+DatePrototype::~DatePrototype()
+{
+}
+
+Value DatePrototype::get_date(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto date = this_object->datetime().day();
+    return Value(static_cast<double>(date));
+}
+
+Value DatePrototype::get_day(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto day = this_object->datetime().weekday();
+    return Value(static_cast<double>(day));
+}
+
+Value DatePrototype::get_full_year(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto full_year = this_object->datetime().year();
+    return Value(static_cast<double>(full_year));
+}
+
+Value DatePrototype::get_hours(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto hours = this_object->datetime().hour();
+    return Value(static_cast<double>(hours));
+}
+
+Value DatePrototype::get_milliseconds(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto milliseconds = this_object->milliseconds();
+    return Value(static_cast<double>(milliseconds));
+}
+
+Value DatePrototype::get_minutes(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto minutes = this_object->datetime().minute();
+    return Value(static_cast<double>(minutes));
+}
+
+Value DatePrototype::get_month(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto months = this_object->datetime().month() - 1;
+    return Value(static_cast<double>(months));
+}
+
+Value DatePrototype::get_seconds(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto seconds = this_object->datetime().second();
+    return Value(static_cast<double>(seconds));
+}
+
+Value DatePrototype::get_time(Interpreter& interpreter)
+{
+    auto* this_object = this_date_from_interpreter(interpreter);
+    if (!this_object)
+        return {};
+    auto seconds = this_object->datetime().timestamp();
+    auto milliseconds = this_object->milliseconds();
+    return Value(static_cast<double>(seconds * 1000 + milliseconds));
+}
+
+}

Libraries/LibJS/Runtime/DatePrototype.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibJS/Runtime/Object.h>
+
+namespace JS {
+
+class DatePrototype final : public Object {
+public:
+    DatePrototype();
+    virtual ~DatePrototype() override;
+
+private:
+    virtual const char* class_name() const override { return "DatePrototype"; }
+
+    static Value get_date(Interpreter&);
+    static Value get_day(Interpreter&);
+    static Value get_full_year(Interpreter&);
+    static Value get_hours(Interpreter&);
+    static Value get_milliseconds(Interpreter&);
+    static Value get_minutes(Interpreter&);
+    static Value get_month(Interpreter&);
+    static Value get_seconds(Interpreter&);
+    static Value get_time(Interpreter&);
+};
+
+}

Libraries/LibJS/Runtime/GlobalObject.cpp

@@ -3,6 +3,7 @@
 #include <LibJS/Heap/Heap.h>
 #include <LibJS/Interpreter.h>
 #include <LibJS/Runtime/ConsoleObject.h>
+#include <LibJS/Runtime/DateConstructor.h>
 #include <LibJS/Runtime/GlobalObject.h>
 #include <LibJS/Runtime/MathObject.h>
 #include <LibJS/Runtime/NativeFunction.h>
@@ -17,6 +18,7 @@ GlobalObject::GlobalObject()
     put_native_function("isNaN", is_nan);
 
     put("console", heap().allocate<ConsoleObject>());
+    put("Date", heap().allocate<DateConstructor>());
     put("Math", heap().allocate<MathObject>());
     put("Object", heap().allocate<ObjectConstructor>());
 }

Libraries/LibJS/Runtime/Object.h

@@ -49,12 +49,13 @@ public:
     void put_native_function(const FlyString& property_name, AK::Function<Value(Interpreter&)>);
     void put_native_property(const FlyString& property_name, AK::Function<Value(Interpreter&)> getter, AK::Function<void(Interpreter&, Value)> setter);
 
-    virtual bool is_error() const { return false; }
     virtual bool is_array() const { return false; }
+    virtual bool is_date() const { return false; }
+    virtual bool is_error() const { return false; }
     virtual bool is_function() const { return false; }
     virtual bool is_native_function() const { return false; }
-    virtual bool is_string_object() const { return false; }
     virtual bool is_native_property() const { return false; }
+    virtual bool is_string_object() const { return false; }
 
     virtual const char* class_name() const override { return "Object"; }
     virtual void visit_children(Cell::Visitor&) override;

Libraries/LibJS/Runtime/Value.cpp

@@ -58,7 +58,7 @@ String Value::to_string() const
             return "NaN";
 
         // FIXME: This needs improvement.
-        return String::number((i32)as_double());
+        return String::format("%f", as_double());
     }
 
     if (is_object())

Libraries/LibJS/Runtime/Value.h

@@ -53,7 +53,7 @@ public:
     bool is_cell() const { return is_string() || is_object(); }
     bool is_array() const;
 
-    bool is_nan() const { return is_number() && __builtin_isnan( as_double()); }
+    bool is_nan() const { return is_number() && __builtin_isnan(as_double()); }
 
     Value()
         : m_type(Type::Undefined)