LibWeb: Refactor SVG files into their own directory; follow spec layout

2025-07-25 03:07:43 +00:00 · 2020-07-23 09:44:42 -07:00 · 2020-07-23 09:44:42 -07:00 · b1299f972c
commit b1299f972c
parent 2e73082203
17 changed files with 386 additions and 172 deletions
--- a/Libraries/LibWeb/SVG/SVGSVGElement.cpp
+++ b/Libraries/LibWeb/SVG/SVGSVGElement.cpp
@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
+ * 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 <LibGfx/Painter.h>
+#include <LibGfx/Path.h>
+#include <LibWeb/CSS/StyleResolver.h>
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/DOM/Event.h>
+#include <LibWeb/SVG/SVGPathElement.h>
+#include <LibWeb/SVG/SVGSVGElement.h>
+#include <LibWeb/Layout/LayoutSVG.h>
+#include <ctype.h>
+
+namespace Web::SVG {
+
+static constexpr auto max_svg_area = 16384 * 16384;
+
+SVGSVGElement::SVGSVGElement(Document& document, const FlyString& tag_name)
+    : SVGGraphicsElement(document, tag_name)
+{
+}
+
+RefPtr<LayoutNode> SVGSVGElement::create_layout_node(const StyleProperties* parent_style)
+{
+    auto style = document().style_resolver().resolve_style(*this, parent_style);
+    if (style->display() == CSS::Display::None)
+        return nullptr;
+    return adopt(*new LayoutSVG(document(), *this, move(style)));
+}
+
+static Gfx::IntSize bitmap_size_for_canvas(const SVGSVGElement& canvas)
+{
+    auto width = canvas.width();
+    auto height = canvas.height();
+
+    Checked<size_t> area = width;
+    area *= height;
+
+    if (area.has_overflow()) {
+        dbg() << "Refusing to create " << width << "x" << height << " svg (overflow)";
+        return {};
+    }
+    if (area.value() > max_svg_area) {
+        dbg() << "Refusing to create " << width << "x" << height << " svg (exceeds maximum size)";
+        return {};
+    }
+    return Gfx::IntSize(width, height);
+}
+
+bool SVGSVGElement::create_bitmap_as_top_level_svg_element()
+{
+    auto size = bitmap_size_for_canvas(*this);
+    if (size.is_empty()) {
+        m_bitmap = nullptr;
+        return false;
+    }
+
+    if (!m_bitmap || m_bitmap->size() != size)
+        m_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGBA32, size);
+
+    Gfx::Painter painter(*m_bitmap);
+    paint(painter, make_painting_context_from(default_painting_context));
+
+    return m_bitmap;
+}
+
+unsigned SVGSVGElement::width() const
+{
+    return attribute(HTML::AttributeNames::width).to_uint().value_or(300);
+}
+
+unsigned SVGSVGElement::height() const
+{
+    return attribute(HTML::AttributeNames::height).to_uint().value_or(150);
+}
+
+void SVGSVGElement::paint(Gfx::Painter& painter, const SVGPaintingContext& context)
+{
+    for_each_child([&](Node& child) {
+        if (is<SVGGraphicsElement>(child)) {
+            to<SVGGraphicsElement>(child).paint(painter, make_painting_context_from(context));
+        }
+    });
+}
+
+}