Libraries: Create top level directory for libraries.

Things were getting a little crowded in the project root, so this patch
moves the Lib*/ directories into Libraries/.

Libraries/LibHTML/Dump.cpp

@@ -0,0 +1,140 @@
+#include <LibHTML/CSS/StyleSheet.h>
+#include <LibHTML/CSS/StyledNode.h>
+#include <LibHTML/DOM/Document.h>
+#include <LibHTML/DOM/Element.h>
+#include <LibHTML/DOM/Text.h>
+#include <LibHTML/Dump.h>
+#include <LibHTML/Layout/LayoutNode.h>
+#include <LibHTML/Layout/LayoutText.h>
+#include <stdio.h>
+
+void dump_tree(const Node& node)
+{
+    static int indent = 0;
+    for (int i = 0; i < indent; ++i)
+        printf("  ");
+    if (node.is_document()) {
+        printf("*Document*\n");
+    } else if (node.is_element()) {
+        printf("<%s", static_cast<const Element&>(node).tag_name().characters());
+        static_cast<const Element&>(node).for_each_attribute([](auto& name, auto& value) {
+            printf(" %s=%s", name.characters(), value.characters());
+        });
+        printf(">\n");
+    } else if (node.is_text()) {
+        printf("\"%s\"\n", static_cast<const Text&>(node).data().characters());
+    }
+    ++indent;
+    if (node.is_parent_node()) {
+        static_cast<const ParentNode&>(node).for_each_child([](auto& child) {
+            dump_tree(child);
+        });
+    }
+    --indent;
+}
+
+void dump_tree(const LayoutNode& layout_node)
+{
+    static int indent = 0;
+    for (int i = 0; i < indent; ++i)
+        printf("  ");
+
+    String tag_name;
+    if (layout_node.is_anonymous())
+        tag_name = "(anonymous)";
+    else if (layout_node.node()->is_text())
+        tag_name = "#text";
+    else if (layout_node.node()->is_document())
+        tag_name = "#document";
+    else if (layout_node.node()->is_element())
+        tag_name = static_cast<const Element&>(*layout_node.node()).tag_name();
+    else
+        tag_name = "???";
+
+    printf("%s {%s} at (%d,%d) size %dx%d",
+        layout_node.class_name(),
+        tag_name.characters(),
+        layout_node.rect().x(),
+        layout_node.rect().y(),
+        layout_node.rect().width(),
+        layout_node.rect().height());
+    if (layout_node.is_text())
+        printf(" \"%s\"", static_cast<const LayoutText&>(layout_node).text().characters());
+    printf("\n");
+    ++indent;
+    layout_node.for_each_child([](auto& child) {
+        dump_tree(child);
+    });
+    --indent;
+}
+
+void dump_tree(const StyledNode& styled_node)
+{
+    static int indent = 0;
+    for (int i = 0; i < indent; ++i)
+        printf("    ");
+
+    String tag_name;
+    auto& node = *styled_node.node();
+    if (node.is_text())
+        tag_name = "#text";
+    else if (node.is_document())
+        tag_name = "#document";
+    else if (node.is_element())
+        tag_name = static_cast<const Element&>(node).tag_name();
+    else
+        tag_name = "???";
+
+    printf("%s", tag_name.characters());
+    printf("\n");
+
+    styled_node.for_each_property([&](auto& key, auto& value) {
+        for (int i = 0; i < indent; ++i)
+            printf("    ");
+        printf("  (%s: %s)\n", key.characters(), value.to_string().characters());
+    });
+    ++indent;
+    styled_node.for_each_child([](auto& child) {
+        dump_tree(child);
+    });
+    --indent;
+}
+
+void dump_rule(const StyleRule& rule)
+{
+    printf("Rule:\n");
+    for (auto& selector : rule.selectors()) {
+        printf("  Selector:\n");
+        for (auto& component : selector.components()) {
+            const char* type_description = "Unknown";
+            switch (component.type) {
+            case Selector::Component::Type::Invalid:
+                type_description = "Invalid";
+                break;
+            case Selector::Component::Type::Id:
+                type_description = "Id";
+                break;
+            case Selector::Component::Type::Class:
+                type_description = "Class";
+                break;
+            case Selector::Component::Type::TagName:
+                type_description = "TagName";
+                break;
+            }
+            printf("    %s:%s\n", type_description, component.value.characters());
+        }
+    }
+    printf("  Declarations:\n");
+    for (auto& declaration : rule.declarations()) {
+        printf("    '%s': '%s'\n", declaration.property_name().characters(), declaration.value().to_string().characters());
+    }
+}
+
+void dump_sheet(const StyleSheet& sheet)
+{
+    printf("StyleSheet{%p}: %d rule(s)\n", &sheet, sheet.rules().size());
+
+    for (auto& rule : sheet.rules()) {
+        dump_rule(rule);
+    }
+}