1 files changed, 89 insertions, 0 deletions
diff --git a/Libraries/LibWeb/Layout/TreeBuilder.cpp b/Libraries/LibWeb/Layout/TreeBuilder.cpp
new file mode 100644
index 0000000000..7b20178093
--- /dev/null
+++ b/Libraries/LibWeb/Layout/TreeBuilder.cpp
@@ -0,0 +1,89 @@
+/*
+ * 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 <LibWeb/DOM/Document.h>
+#include <LibWeb/DOM/ParentNode.h>
+#include <LibWeb/Layout/Node.h>
+#include <LibWeb/Layout/TableBox.h>
+#include <LibWeb/Layout/TextNode.h>
+#include <LibWeb/Layout/TreeBuilder.h>
+
+namespace Web::Layout {
+
+TreeBuilder::TreeBuilder()
+{
+}
+
+static RefPtr<Node> create_layout_tree(DOM::Node& node, const CSS::StyleProperties* parent_style)
+{
+    auto layout_node = node.create_layout_node(parent_style);
+    if (!layout_node)
+        return nullptr;
+
+    if (!node.has_children())
+        return layout_node;
+
+    NonnullRefPtrVector<Node> layout_children;
+    bool have_inline_children = false;
+    bool have_noninline_children = false;
+
+    downcast<DOM::ParentNode>(node).for_each_child([&](DOM::Node& child) {
+        auto layout_child = create_layout_tree(child, &layout_node->specified_style());
+        if (!layout_child)
+            return;
+        if (layout_child->is_inline())
+            have_inline_children = true;
+        else
+            have_noninline_children = true;
+        layout_children.append(layout_child.release_nonnull());
+    });
+
+    for (auto& layout_child : layout_children) {
+        if (have_noninline_children && have_inline_children && layout_child.is_inline()) {
+            if (is<TextNode>(layout_child) && downcast<TextNode>(layout_child).text_for_style(*parent_style) == " ")
+                continue;
+            layout_node->inline_wrapper().append_child(layout_child);
+        } else {
+            layout_node->append_child(layout_child);
+        }
+    }
+
+    if (have_inline_children && !have_noninline_children)
+        layout_node->set_children_are_inline(true);
+
+    return layout_node;
+}
+
+RefPtr<Node> TreeBuilder::build(DOM::Node& node)
+{
+    if (!is<DOM::Document>(node) && node.has_children()) {
+        dbg() << "FIXME: Support building partial layout trees.";
+        return nullptr;
+    }
+    return create_layout_tree(node, nullptr);
+}
+
+}