LibWeb: Extract CanvasPathDrawingStyles class from CRC2D

Userland/Libraries/LibWeb/HTML/Canvas/CanvasPathDrawingStyles.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/HTML/Canvas/CanvasState.h>
+
+namespace Web::HTML {
+
+// https://html.spec.whatwg.org/multipage/canvas.html#canvaspathdrawingstyles
+template<typename IncludingClass>
+class CanvasPathDrawingStyles {
+public:
+    ~CanvasPathDrawingStyles() = default;
+
+    void set_line_width(float line_width) { my_drawing_state().line_width = line_width; }
+    float line_width() const { return my_drawing_state().line_width; }
+
+protected:
+    CanvasPathDrawingStyles() = default;
+
+private:
+    CanvasState::DrawingState& my_drawing_state() { return reinterpret_cast<IncludingClass&>(*this).drawing_state(); }
+    CanvasState::DrawingState const& my_drawing_state() const { return reinterpret_cast<IncludingClass const&>(*this).drawing_state(); }
+};
+
+}

Userland/Libraries/LibWeb/HTML/Canvas/CanvasPathDrawingStyles.idl

@@ -0,0 +1,22 @@
+// https://html.spec.whatwg.org/multipage/canvas.html#canvaslinecap
+enum CanvasLineCap { "butt", "round", "square" };
+enum CanvasLineJoin { "round", "bevel", "miter" };
+enum CanvasTextAlign { "start", "end", "left", "right", "center" };
+enum CanvasTextBaseline { "top", "hanging", "middle", "alphabetic", "ideographic", "bottom" };
+enum CanvasDirection { "ltr", "rtl", "inherit" };
+enum CanvasFontKerning { "auto", "normal", "none" };
+enum CanvasFontStretch { "ultra-condensed", "extra-condensed", "condensed", "semi-condensed", "normal", "semi-expanded", "expanded", "extra-expanded", "ultra-expanded" };
+enum CanvasFontVariantCaps { "normal", "small-caps", "all-small-caps", "petite-caps", "all-petite-caps", "unicase", "titling-caps" };
+enum CanvasTextRendering { "auto", "optimizeSpeed", "optimizeLegibility", "geometricPrecision" };
+
+// https://html.spec.whatwg.org/multipage/canvas.html#canvaspathdrawingstyles
+interface mixin CanvasPathDrawingStyles {
+    attribute unrestricted double lineWidth;
+    // FIXME: attribute CanvasLineCap lineCap;
+    // FIXME: attribute CanvasLineJoin lineJoin;
+    // FIXME: attribute unrestricted double miterLimit;
+
+    // FIXME: undefined setLineDash(sequence<unrestricted double> segments);
+    // FIXME: sequence<unrestricted double> getLineDash();
+    // FIXME: attribute unrestricted double lineDashOffset;
+};

Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h

@@ -21,6 +21,7 @@
 #include <LibWeb/HTML/Canvas/CanvasFillStrokeStyles.h>
 #include <LibWeb/HTML/Canvas/CanvasImageData.h>
 #include <LibWeb/HTML/Canvas/CanvasPath.h>
+#include <LibWeb/HTML/Canvas/CanvasPathDrawingStyles.h>
 #include <LibWeb/HTML/Canvas/CanvasRect.h>
 #include <LibWeb/HTML/Canvas/CanvasState.h>
 #include <LibWeb/HTML/Canvas/CanvasText.h>
@@ -46,7 +47,8 @@ class CanvasRenderingContext2D
     , public CanvasDrawPath
     , public CanvasText
     , public CanvasDrawImage
-    , public CanvasImageData {
+    , public CanvasImageData
+    , public CanvasPathDrawingStyles<CanvasRenderingContext2D> {
 
     AK_MAKE_NONCOPYABLE(CanvasRenderingContext2D);
     AK_MAKE_NONMOVABLE(CanvasRenderingContext2D);
@@ -63,9 +65,6 @@ public:
 
     virtual DOM::ExceptionOr<void> draw_image_internal(CanvasImageSource const&, float source_x, float source_y, float source_width, float source_height, float destination_x, float destination_y, float destination_width, float destination_height) override;
 
-    void set_line_width(float line_width) { drawing_state().line_width = line_width; }
-    float line_width() const { return drawing_state().line_width; }
-
     virtual void begin_path() override;
     virtual void stroke() override;
     virtual void stroke(Path2D const& path) override;

Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl

@@ -4,6 +4,7 @@
 #import <HTML/Canvas/CanvasFillStrokeStyles.idl>
 #import <HTML/Canvas/CanvasImageData.idl>
 #import <HTML/Canvas/CanvasPath.idl>
+#import <HTML/Canvas/CanvasPathDrawingStyles.idl>
 #import <HTML/Canvas/CanvasRect.idl>
 #import <HTML/Canvas/CanvasState.idl>
 #import <HTML/Canvas/CanvasText.idl>
@@ -12,11 +13,7 @@
 // https://html.spec.whatwg.org/multipage/canvas.html#canvasrenderingcontext2d
 [Exposed=Window]
 interface CanvasRenderingContext2D {
-
-    attribute double lineWidth;
-
     [ImplementedAs=canvas_for_binding] readonly attribute HTMLCanvasElement canvas;
-
 };
 
 CanvasRenderingContext2D includes CanvasState;
@@ -27,4 +24,5 @@ CanvasRenderingContext2D includes CanvasDrawPath;
 CanvasRenderingContext2D includes CanvasText;
 CanvasRenderingContext2D includes CanvasDrawImage;
 CanvasRenderingContext2D includes CanvasImageData;
+CanvasRenderingContext2D includes CanvasPathDrawingStyles;
 CanvasRenderingContext2D includes CanvasPath;