LibWeb: Rename LayoutNode classes and move them into Layout namespace

Bring the names of various boxes closer to spec language. This should hopefully make things easier to understand and hack on. :^) Some notable changes: - LayoutNode -> Layout::Node - LayoutBox -> Layout::Box - LayoutBlock -> Layout::BlockBox - LayoutReplaced -> Layout::ReplacedBox - LayoutDocument -> Layout::InitialContainingBlockBox - LayoutText -> Layout::TextNode - LayoutInline -> Layout::InlineNode Note that this is not strictly a "box tree" as we also hang inline/text nodes in the same tree, and they don't generate boxes. (Instead, they contribute line box fragments to their containing block!)
2025-07-26 12:07:45 +00:00 · 2020-11-22 15:53:01 +01:00 · 2020-11-22 15:53:01 +01:00 · 5aeab9878e
commit 5aeab9878e
parent f358f2255f
114 changed files with 863 additions and 880 deletions
--- a/Libraries/LibWeb/Layout/BlockBox.h
+++ b/Libraries/LibWeb/Layout/BlockBox.h
@ -0,0 +1,91 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <LibWeb/Layout/Box.h>
+#include <LibWeb/Layout/LineBox.h>
+
+namespace Web::Layout {
+
+class BlockBox : public Box {
+public:
+    BlockBox(DOM::Document&, DOM::Node*, NonnullRefPtr<CSS::StyleProperties>);
+    virtual ~BlockBox() override;
+
+    virtual const char* class_name() const override { return "BlockBox"; }
+
+    virtual void paint(PaintContext&, PaintPhase) override;
+
+    virtual Node& inline_wrapper() override;
+
+    virtual HitTestResult hit_test(const Gfx::IntPoint&, HitTestType) const override;
+
+    BlockBox* previous_sibling() { return downcast<BlockBox>(Node::previous_sibling()); }
+    const BlockBox* previous_sibling() const { return downcast<BlockBox>(Node::previous_sibling()); }
+    BlockBox* next_sibling() { return downcast<BlockBox>(Node::next_sibling()); }
+    const BlockBox* next_sibling() const { return downcast<BlockBox>(Node::next_sibling()); }
+
+    template<typename Callback>
+    void for_each_fragment(Callback);
+    template<typename Callback>
+    void for_each_fragment(Callback) const;
+
+    virtual void split_into_lines(BlockBox& container, LayoutMode) override;
+
+private:
+    virtual bool is_block() const override { return true; }
+
+    NonnullRefPtr<CSS::StyleProperties> style_for_anonymous_block() const;
+};
+
+template<typename Callback>
+void BlockBox::for_each_fragment(Callback callback)
+{
+    for (auto& line_box : line_boxes()) {
+        for (auto& fragment : line_box.fragments()) {
+            if (callback(fragment) == IterationDecision::Break)
+                return;
+        }
+    }
+}
+
+template<typename Callback>
+void BlockBox::for_each_fragment(Callback callback) const
+{
+    for (auto& line_box : line_boxes()) {
+        for (auto& fragment : line_box.fragments()) {
+            if (callback(fragment) == IterationDecision::Break)
+                return;
+        }
+    }
+}
+
+}
+
+AK_BEGIN_TYPE_TRAITS(Web::Layout::BlockBox)
+static bool is_type(const Web::Layout::Node& layout_node) { return layout_node.is_block(); }
+AK_END_TYPE_TRAITS()