Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/HTML/Canvas/CanvasPathDrawingStyles.h

@@ -0,0 +1,123 @@
+/*
+ * 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;
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-linewidth
+    void set_line_width(float line_width)
+    {
+        // On setting, zero, negative, infinite, and NaN values must be ignored, leaving the value unchanged;
+        if (line_width <= 0 || !isfinite(line_width))
+            return;
+        // other values must change the current value to the new value.
+        my_drawing_state().line_width = line_width;
+    }
+    float line_width() const
+    {
+        // On getting, it must return the current value.
+        return my_drawing_state().line_width;
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-linecap
+    void set_line_cap(Bindings::CanvasLineCap line_cap)
+    {
+        // On setting, the current value must be changed to the new value.
+        my_drawing_state().line_cap = line_cap;
+    }
+    Bindings::CanvasLineCap line_cap() const
+    {
+        // On getting, it must return the current value.
+        return my_drawing_state().line_cap;
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-linejoin
+    void set_line_join(Bindings::CanvasLineJoin line_join)
+    {
+        // On setting, the current value must be changed to the new value.
+        my_drawing_state().line_join = line_join;
+    }
+    Bindings::CanvasLineJoin line_join() const
+    {
+        // On getting, it must return the current value.
+        return my_drawing_state().line_join;
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-miterlimit
+    void set_miter_limit(float miter_limit)
+    {
+        // On setting, zero, negative, infinite, and NaN values must be ignored, leaving the value unchanged;
+        if (miter_limit <= 0 || !isfinite(miter_limit))
+            return;
+        // other values must change the current value to the new value.
+        my_drawing_state().miter_limit = miter_limit;
+    }
+    float miter_limit() const
+    {
+        // On getting, it must return the current value.
+        return my_drawing_state().miter_limit;
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-setlinedash
+    void set_line_dash(Vector<double> segments)
+    {
+        // The setLineDash(segments) method, when invoked, must run these steps:
+
+        // 1. If any value in segments is not finite (e.g. an Infinity or a NaN value), or if any value is negative (less than zero), then return
+        //    (without throwing an exception; user agents could show a message on a developer console, though, as that would be helpful for debugging).
+        for (auto const& segment : segments) {
+            if (!isfinite(segment) || segment < 0)
+                return;
+        }
+
+        // 2. If the number of elements in segments is odd, then let segments be the concatenation of two copies of segments.
+        if (segments.size() % 2 == 1)
+            segments.extend(segments);
+
+        // 3. Let the object's dash list be segments.
+        my_drawing_state().dash_list = segments;
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-getlinedash
+    Vector<double> get_line_dash()
+    {
+        // When the getLineDash() method is invoked, it must return a sequence whose values are the values of the object's dash list, in the same order.
+        return my_drawing_state().dash_list;
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-linedashoffset
+    void set_line_dash_offset(float line_dash_offset)
+    {
+        // On setting, infinite and NaN values must be ignored, leaving the value unchanged;
+        if (!isfinite(line_dash_offset))
+            return;
+        // other values must change the current value to the new value.
+        my_drawing_state().line_dash_offset = line_dash_offset;
+    }
+    float line_dash_offset() const
+    {
+        // On getting, it must return the current value.
+        return my_drawing_state().line_dash_offset;
+    }
+
+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(); }
+};
+
+}