LibHTML: Add a LayoutStyle object (computed style for a LayoutNode.)

LibHTML/Layout/LayoutNode.h

@@ -2,6 +2,7 @@
 
 #include <AK/Retained.h>
 #include <AK/Vector.h>
+#include <LibHTML/Layout/LayoutStyle.h>
 #include <SharedGraphics/Rect.h>
 
 class Node;
@@ -17,6 +18,9 @@ public:
     const Rect& rect() const { return m_rect; }
     void set_rect(const Rect& rect) { m_rect = rect; }
 
+    LayoutStyle& style() { return m_style; }
+    const LayoutStyle& style() const { return m_style; }
+
     bool is_anonymous() const { return !m_node; }
     const Node* node() const { return m_node; }
 
@@ -55,5 +59,6 @@ private:
     LayoutNode* m_last_child { nullptr };
     LayoutNode* m_next_sibling { nullptr };
     LayoutNode* m_previous_sibling { nullptr };
+    LayoutStyle m_style;
     Rect m_rect;
 };

LibHTML/Layout/LayoutStyle.cpp

@@ -0,0 +1,9 @@
+#include <LibHTML/Layout/LayoutStyle.h>
+
+LayoutStyle::LayoutStyle()
+{
+}
+
+LayoutStyle::~LayoutStyle()
+{
+}

LibHTML/Layout/LayoutStyle.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <SharedGraphics/Color.h>
+
+struct Box {
+    int top { 0 };
+    int right { 0 };
+    int bottom { 0 };
+    int left { 0 };
+};
+
+enum FontStyle {
+    Normal,
+    Bold,
+};
+
+class LayoutStyle {
+public:
+    LayoutStyle();
+    ~LayoutStyle();
+
+    Color text_color() const { return m_text_color; }
+    Color background_color() const { return m_background_color; }
+
+    Box& offset() { return m_offset; }
+    Box& margin() { return m_margin; }
+    Box& padding() { return m_padding; }
+
+    const Box& offset() const { return m_offset; }
+    const Box& margin() const { return m_margin; }
+    const Box& padding() const { return m_padding; }
+
+    FontStyle font_style() const { return m_font_style; }
+
+private:
+    Color m_text_color;
+    Color m_background_color;
+
+    Box m_offset;
+    Box m_margin;
+    Box m_padding;
+
+    FontStyle m_font_style { FontStyle::Normal };
+};

LibHTML/Makefile

@@ -12,6 +12,7 @@ LIBHTML_OBJS = \
     Layout/LayoutBlock.o \
     Layout/LayoutInline.o \
     Layout/LayoutDocument.o \
+    Layout/LayoutStyle.o \
     Dump.o
 
 TEST_OBJS = test.o