LibWeb: Rename directory LibHTML => LibWeb

Let's rename this to LibWeb since it aims to provide more parts of the
web platform than just HTML. :^)

Libraries/LibWeb/DOM/Node.cpp

@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/StringBuilder.h>
+#include <LibWeb/CSS/StyleResolver.h>
+#include <LibWeb/DOM/Element.h>
+#include <LibWeb/DOM/HTMLAnchorElement.h>
+#include <LibWeb/DOM/Node.h>
+#include <LibWeb/Layout/LayoutBlock.h>
+#include <LibWeb/Layout/LayoutDocument.h>
+#include <LibWeb/Layout/LayoutInline.h>
+#include <LibWeb/Layout/LayoutNode.h>
+#include <LibWeb/Layout/LayoutText.h>
+
+namespace Web {
+
+Node::Node(Document& document, NodeType type)
+    : m_document(document)
+    , m_type(type)
+{
+}
+
+Node::~Node()
+{
+}
+
+const HTMLAnchorElement* Node::enclosing_link_element() const
+{
+    for (auto* node = this; node; node = node->parent()) {
+        if (is<HTMLAnchorElement>(*node) && to<HTMLAnchorElement>(*node).has_attribute("href"))
+            return to<HTMLAnchorElement>(node);
+    }
+    return nullptr;
+}
+
+const HTMLElement* Node::enclosing_html_element() const
+{
+    return first_ancestor_of_type<HTMLElement>();
+}
+
+String Node::text_content() const
+{
+    Vector<String> strings;
+    StringBuilder builder;
+    for (auto* child = first_child(); child; child = child->next_sibling()) {
+        auto text = child->text_content();
+        if (!text.is_empty()) {
+            builder.append(child->text_content());
+            builder.append(' ');
+        }
+    }
+    if (builder.length() > 1)
+        builder.trim(1);
+    return builder.to_string();
+}
+
+const Element* Node::next_element_sibling() const
+{
+    for (auto* node = next_sibling(); node; node = node->next_sibling()) {
+        if (node->is_element())
+            return static_cast<const Element*>(node);
+    }
+    return nullptr;
+}
+
+const Element* Node::previous_element_sibling() const
+{
+    for (auto* node = previous_sibling(); node; node = node->previous_sibling()) {
+        if (node->is_element())
+            return static_cast<const Element*>(node);
+    }
+    return nullptr;
+}
+
+RefPtr<LayoutNode> Node::create_layout_node(const StyleProperties*) const
+{
+    return nullptr;
+}
+
+void Node::invalidate_style()
+{
+    for_each_in_subtree_of_type<Element>([&](auto& element) {
+        element.set_needs_style_update(true);
+        return IterationDecision::Continue;
+    });
+    document().schedule_style_update();
+}
+
+bool Node::is_link() const
+{
+    auto* enclosing_link = enclosing_link_element();
+    if (!enclosing_link)
+        return false;
+    return enclosing_link->has_attribute("href");
+}
+
+}