LibWeb: Expose DOM::Range to JavaScript.

Author: https://github.com/asynts
Commit: https://github.com/SerenityOS/serenity/commit/1c7a8342782
Pull-request: https://github.com/SerenityOS/serenity/pull/4318
Reviewed-by: https://github.com/Lubrsi
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/linusg

Libraries/LibWeb/Bindings/RangeConstructor.cpp

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * 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 <LibJS/Heap/Heap.h>
+#include <LibWeb/Bindings/RangeConstructor.h>
+#include <LibWeb/Bindings/RangeWrapper.h>
+#include <LibWeb/Bindings/WindowObject.h>
+#include <LibWeb/DOM/Range.h>
+
+namespace Web::Bindings {
+
+RangeConstructor::RangeConstructor(JS::GlobalObject& global_object)
+    : NativeFunction(*global_object.function_prototype())
+{
+}
+
+void RangeConstructor::initialize(JS::GlobalObject& global_object)
+{
+    NativeFunction::initialize(global_object);
+
+    define_property("length", JS::Value(0), JS::Attribute::Configurable);
+}
+
+JS::Value RangeConstructor::call()
+{
+    return construct(*this);
+}
+
+JS::Value RangeConstructor::construct(Function&)
+{
+    auto& window = static_cast<WindowObject&>(global_object());
+    return heap().allocate<RangeWrapper>(window, window, DOM::Range::create(window.impl()));
+}
+
+}

Libraries/LibWeb/Bindings/RangeConstructor.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * 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 Web::Bindings {
+
+class RangeConstructor final : public JS::NativeFunction {
+public:
+    explicit RangeConstructor(JS::GlobalObject&);
+
+    void initialize(JS::GlobalObject&) override;
+
+    JS::Value call() override;
+    JS::Value construct(JS::Function& new_target) override;
+
+private:
+    bool has_constructor() const override { return true; }
+    const char* class_name() const override { return "RangeConstructor"; }
+};
+
+}

Libraries/LibWeb/Bindings/RangePrototype.cpp

@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * 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 <LibJS/Runtime/GlobalObject.h>
+#include <LibWeb/Bindings/NodeWrapper.h>
+#include <LibWeb/Bindings/NodeWrapperFactory.h>
+#include <LibWeb/Bindings/RangePrototype.h>
+#include <LibWeb/Bindings/RangeWrapper.h>
+#include <LibWeb/DOM/Range.h>
+
+namespace Web::Bindings {
+
+RangePrototype::RangePrototype(JS::GlobalObject& global_object)
+    : Object(*global_object.object_prototype())
+{
+}
+
+void RangePrototype::initialize(JS::GlobalObject& global_object)
+{
+    auto default_attributes = JS::Attribute::Enumerable | JS::Attribute::Configurable;
+
+    Object::initialize(global_object);
+
+    define_native_function("setStart", set_start, 2);
+    define_native_function("setEnd", set_end, 2);
+    define_native_function("cloneRange", clone_range, 0);
+
+    define_native_property("startContainer", start_container_getter, nullptr, default_attributes);
+    define_native_property("endContainer", end_container_getter, nullptr, default_attributes);
+    define_native_property("startOffset", start_offset_getter, nullptr, default_attributes);
+    define_native_property("endOffset", end_offset_getter, nullptr, default_attributes);
+}
+
+static DOM::Range* impl_from(JS::VM& vm, JS::GlobalObject& global_object)
+{
+    auto* this_object = vm.this_value(global_object).to_object(global_object);
+    if (!this_object)
+        return nullptr;
+    if (StringView("RangeWrapper") != this_object->class_name()) {
+        vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "Range");
+        return nullptr;
+    }
+    return &static_cast<RangeWrapper*>(this_object)->impl();
+}
+
+JS_DEFINE_NATIVE_FUNCTION(RangePrototype::set_start)
+{
+    auto* impl = impl_from(vm, global_object);
+    if (!impl)
+        return {};
+
+    auto arg0 = vm.argument(0).to_object(global_object);
+    if (vm.exception())
+        return {};
+    auto arg1 = vm.argument(1).to_number(global_object);
+    if (vm.exception())
+        return {};
+
+    if (!static_cast<NodeWrapper*>(arg0)->is_node_wrapper()) {
+        vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "Range");
+        return {};
+    }
+
+    impl->set_start(static_cast<NodeWrapper*>(arg0)->impl(), arg1.as_i32());
+
+    return JS::js_undefined();
+}
+
+JS_DEFINE_NATIVE_FUNCTION(RangePrototype::set_end)
+{
+    auto* impl = impl_from(vm, global_object);
+    if (!impl)
+        return {};
+
+    auto arg0 = vm.argument(0).to_object(global_object);
+    if (vm.exception())
+        return {};
+    auto arg1 = vm.argument(1).to_number(global_object);
+    if (vm.exception())
+        return {};
+
+    if (!static_cast<NodeWrapper*>(arg0)->is_node_wrapper()) {
+        vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "Range");
+        return {};
+    }
+
+    impl->set_end(static_cast<NodeWrapper*>(arg0)->impl(), arg1.as_i32());
+
+    return JS::js_undefined();
+}
+
+JS_DEFINE_NATIVE_FUNCTION(RangePrototype::clone_range)
+{
+    auto* impl = impl_from(vm, global_object);
+    if (!impl)
+        return {};
+
+    return wrap(global_object, *impl->clone_range());
+}
+
+JS_DEFINE_NATIVE_GETTER(RangePrototype::start_container_getter)
+{
+    auto* impl = impl_from(vm, global_object);
+    if (!impl)
+        return {};
+
+    return wrap(global_object, *impl->start_container());
+}
+
+JS_DEFINE_NATIVE_GETTER(RangePrototype::end_container_getter)
+{
+    auto* impl = impl_from(vm, global_object);
+    if (!impl)
+        return {};
+
+    return wrap(global_object, *impl->end_container());
+}
+
+JS_DEFINE_NATIVE_GETTER(RangePrototype::start_offset_getter)
+{
+    auto* impl = impl_from(vm, global_object);
+    if (!impl)
+        return {};
+
+    return JS::Value(impl->start_offset());
+}
+
+JS_DEFINE_NATIVE_GETTER(RangePrototype::end_offset_getter)
+{
+    auto* impl = impl_from(vm, global_object);
+    if (!impl)
+        return {};
+
+    return JS::Value(impl->end_offset());
+}
+
+}

Libraries/LibWeb/Bindings/RangePrototype.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * 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 Web::Bindings {
+
+class RangePrototype final : public JS::Object {
+    JS_OBJECT(RangePrototype, JS::Object);
+
+public:
+    explicit RangePrototype(JS::GlobalObject&);
+
+    void initialize(JS::GlobalObject&) override;
+
+private:
+    JS_DECLARE_NATIVE_FUNCTION(set_start);
+    JS_DECLARE_NATIVE_FUNCTION(set_end);
+    JS_DECLARE_NATIVE_FUNCTION(clone_range);
+
+    JS_DECLARE_NATIVE_GETTER(start_container_getter);
+    JS_DECLARE_NATIVE_GETTER(end_container_getter);
+    JS_DECLARE_NATIVE_GETTER(start_offset_getter);
+    JS_DECLARE_NATIVE_GETTER(end_offset_getter);
+    JS_DECLARE_NATIVE_GETTER(collapsed_getter);
+};
+
+}

Libraries/LibWeb/Bindings/RangeWrapper.cpp

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * 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 <LibWeb/Bindings/RangePrototype.h>
+#include <LibWeb/Bindings/RangeWrapper.h>
+#include <LibWeb/Bindings/WindowObject.h>
+#include <LibWeb/Bindings/Wrappable.h>
+#include <LibWeb/DOM/Range.h>
+
+namespace Web::Bindings {
+
+RangeWrapper::RangeWrapper(JS::GlobalObject& global_object, DOM::Range& impl)
+    : Wrapper(global_object)
+    , m_impl(impl)
+{
+    set_prototype(static_cast<WindowObject&>(global_object).range_prototype());
+}
+
+RangeWrapper* wrap(JS::GlobalObject& global_object, DOM::Range& impl)
+{
+    return static_cast<RangeWrapper*>(wrap_impl(global_object, impl));
+}
+
+}

Libraries/LibWeb/Bindings/RangeWrapper.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibWeb/Bindings/Wrapper.h>
+
+namespace Web::Bindings {
+
+class RangeWrapper final : public Wrapper {
+public:
+    RangeWrapper(JS::GlobalObject&, DOM::Range&);
+
+    DOM::Range& impl() { return m_impl; }
+    const DOM::Range& impl() const { return m_impl; }
+
+private:
+    virtual const char* class_name() const override { return "RangeWrapper"; }
+
+    NonnullRefPtr<DOM::Range> m_impl;
+};
+
+RangeWrapper* wrap(JS::GlobalObject&, DOM::Range&);
+
+}

Libraries/LibWeb/Bindings/WindowObject.cpp

@@ -41,6 +41,8 @@
 #include <LibWeb/Bindings/NavigatorObject.h>
 #include <LibWeb/Bindings/NodeWrapperFactory.h>
 #include <LibWeb/Bindings/PerformanceWrapper.h>
+#include <LibWeb/Bindings/RangeConstructor.h>
+#include <LibWeb/Bindings/RangePrototype.h>
 #include <LibWeb/Bindings/WindowObject.h>
 #include <LibWeb/Bindings/XMLHttpRequestConstructor.h>
 #include <LibWeb/Bindings/XMLHttpRequestPrototype.h>
@@ -86,6 +88,11 @@ void WindowObject::initialize()
 
     m_xhr_prototype = heap().allocate<XMLHttpRequestPrototype>(*this, *this);
     add_constructor("XMLHttpRequest", m_xhr_constructor, m_xhr_prototype);
+
+    m_range_prototype = heap().allocate<RangePrototype>(*this, *this);
+    m_range_constructor = heap().allocate<RangeConstructor>(*this, *this);
+    m_range_constructor->define_property("prototype", m_range_prototype);
+    add_constructor("Range", m_range_constructor, m_range_prototype);
 }
 
 WindowObject::~WindowObject()

Libraries/LibWeb/Bindings/WindowObject.h

@@ -50,6 +50,9 @@ public:
     XMLHttpRequestPrototype* xhr_prototype() { return m_xhr_prototype; }
     XMLHttpRequestConstructor* xhr_constructor() { return m_xhr_constructor; }
 
+    RangePrototype* range_prototype() { return m_range_prototype; }
+    RangeConstructor* range_constructor() { return m_range_constructor; }
+
 private:
     virtual const char* class_name() const override { return "WindowObject"; }
     virtual void visit_edges(Visitor&) override;
@@ -76,6 +79,9 @@ private:
 
     XMLHttpRequestConstructor* m_xhr_constructor { nullptr };
     XMLHttpRequestPrototype* m_xhr_prototype { nullptr };
+
+    RangePrototype* m_range_prototype { nullptr };
+    RangeConstructor* m_range_constructor { nullptr };
 };
 
 }

Libraries/LibWeb/CMakeLists.txt

@@ -11,6 +11,9 @@ set(SOURCES
     Bindings/XMLHttpRequestConstructor.cpp
     Bindings/XMLHttpRequestPrototype.cpp
     Bindings/XMLHttpRequestWrapper.cpp
+    Bindings/RangeConstructor.cpp
+    Bindings/RangePrototype.cpp
+    Bindings/RangeWrapper.cpp
     CSS/DefaultStyleSheetSource.cpp
     CSS/Length.cpp
     CSS/Parser/CSSParser.cpp

Libraries/LibWeb/DOM/Range.cpp

@@ -27,13 +27,14 @@
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/Node.h>
 #include <LibWeb/DOM/Range.h>
+#include <LibWeb/DOM/Window.h>
 
 namespace Web::DOM {
 
-Range::Range(Document& document)
-    : m_start_container(document)
+Range::Range(Window& window)
+    : m_start_container(window.document())
     , m_start_offset(0)
-    , m_end_container(document)
+    , m_end_container(window.document())
     , m_end_offset(0)
 {
 }

Libraries/LibWeb/DOM/Range.h

@@ -28,6 +28,7 @@
 
 #include <AK/RefCounted.h>
 #include <LibWeb/Bindings/Wrappable.h>
+#include <LibWeb/DOM/Node.h>
 
 namespace Web::DOM {
 
@@ -35,17 +36,19 @@ class Range final
     : public RefCounted<Range>
     , public Bindings::Wrappable {
 public:
-    // using WrapperType = Bindings::RangeWrapper;
+    using WrapperType = Bindings::RangeWrapper;
 
-    static NonnullRefPtr<Range> create(Document& document)
+    static NonnullRefPtr<Range> create(Window& window)
     {
-        return adopt(*new Range(document));
+        return adopt(*new Range(window));
     }
     static NonnullRefPtr<Range> create(Node& start_container, size_t start_offset, Node& end_container, size_t end_offset)
     {
         return adopt(*new Range(start_container, start_offset, end_container, end_offset));
     }
 
+    // FIXME: There are a ton of methods missing here.
+
     Node* start_container() { return m_start_container; }
     unsigned start_offset() { return m_start_offset; }
 
@@ -57,16 +60,16 @@ public:
         return start_container() == end_container() && start_offset() == end_offset();
     }
 
-    void set_start(Node& container, JS::Value& offset)
+    void set_start(Node& container, unsigned offset)
     {
         m_start_container = container;
-        m_start_offset = (unsigned)offset.as_i32();
+        m_start_offset = offset;
     }
 
-    void set_end(Node& container, JS::Value& offset)
+    void set_end(Node& container, unsigned offset)
     {
         m_end_container = container;
-        m_end_offset = (unsigned)offset.as_i32();
+        m_end_offset = offset;
     }
 
     NonnullRefPtr<Range> inverted() const;
@@ -74,7 +77,7 @@ public:
     NonnullRefPtr<Range> clone_range() const;
 
 private:
-    explicit Range(Document&);
+    explicit Range(Window&);
     Range(Node& start_container, size_t start_offset, Node& end_container, size_t end_offset);
 
     NonnullRefPtr<Node> m_start_container;

Libraries/LibWeb/Forward.h

@@ -288,5 +288,8 @@ class Wrapper;
 class XMLHttpRequestConstructor;
 class XMLHttpRequestPrototype;
 class XMLHttpRequestWrapper;
+class RangeConstructor;
+class RangePrototype;
+class RangeWrapper;
 
 }