Libraries: Move to Userland/Libraries/

1 files changed, 135 insertions, 0 deletions

diff --git a/Userland/Libraries/LibWeb/Layout/ImageBox.cpp b/Userland/Libraries/LibWeb/Layout/ImageBox.cpp
new file mode 100644
index 0000000000..a00c551c7a
--- /dev/null
+++ b/Userland/Libraries/LibWeb/Layout/ImageBox.cpp
@@ -0,0 +1,135 @@
+/*
+ * 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.
+ */
+
+#include <LibGUI/Painter.h>
+#include <LibGfx/Font.h>
+#include <LibGfx/FontDatabase.h>
+#include <LibGfx/ImageDecoder.h>
+#include <LibGfx/StylePainter.h>
+#include <LibWeb/Layout/ImageBox.h>
+
+namespace Web::Layout {
+
+ImageBox::ImageBox(DOM::Document& document, DOM::Element& element, NonnullRefPtr<CSS::StyleProperties> style, const ImageLoader& image_loader)
+    : ReplacedBox(document, element, move(style))
+    , m_image_loader(image_loader)
+{
+}
+
+ImageBox::~ImageBox()
+{
+}
+
+int ImageBox::preferred_width() const
+{
+    return dom_node().attribute(HTML::AttributeNames::width).to_int().value_or(m_image_loader.width());
+}
+
+int ImageBox::preferred_height() const
+{
+    return dom_node().attribute(HTML::AttributeNames::height).to_int().value_or(m_image_loader.height());
+}
+
+void ImageBox::prepare_for_replaced_layout()
+{
+    if (!m_image_loader.has_loaded_or_failed()) {
+        set_has_intrinsic_width(true);
+        set_has_intrinsic_height(true);
+        set_intrinsic_width(0);
+        set_intrinsic_height(0);
+    } else {
+        if (m_image_loader.width()) {
+            set_has_intrinsic_width(true);
+            set_intrinsic_width(m_image_loader.width());
+        }
+        if (m_image_loader.height()) {
+            set_has_intrinsic_height(true);
+            set_intrinsic_height(m_image_loader.height());
+        }
+
+        if (m_image_loader.width() && m_image_loader.height()) {
+            set_has_intrinsic_ratio(true);
+            set_intrinsic_ratio((float)m_image_loader.width() / (float)m_image_loader.height());
+        } else {
+            set_has_intrinsic_ratio(false);
+        }
+    }
+
+    if (renders_as_alt_text()) {
+        auto& image_element = downcast<HTML::HTMLImageElement>(dom_node());
+        auto& font = Gfx::FontDatabase::default_font();
+        auto alt = image_element.alt();
+        if (alt.is_empty())
+            alt = image_element.src();
+        set_width(font.width(alt) + 16);
+        set_height(font.glyph_height() + 16);
+    }
+
+    if (!has_intrinsic_width() && !has_intrinsic_height()) {
+        set_width(16);
+        set_height(16);
+    }
+}
+
+void ImageBox::paint(PaintContext& context, PaintPhase phase)
+{
+    if (!is_visible())
+        return;
+
+    // FIXME: This should be done at a different level. Also rect() does not include padding etc!
+    if (!context.viewport_rect().intersects(enclosing_int_rect(absolute_rect())))
+        return;
+
+    ReplacedBox::paint(context, phase);
+
+    if (phase == PaintPhase::Foreground) {
+        if (renders_as_alt_text()) {
+            auto& image_element = downcast<HTML::HTMLImageElement>(dom_node());
+            context.painter().set_font(Gfx::FontDatabase::default_font());
+            Gfx::StylePainter::paint_frame(context.painter(), enclosing_int_rect(absolute_rect()), context.palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Sunken, 2);
+            auto alt = image_element.alt();
+            if (alt.is_empty())
+                alt = image_element.src();
+            context.painter().draw_text(enclosing_int_rect(absolute_rect()), alt, Gfx::TextAlignment::Center, computed_values().color(), Gfx::TextElision::Right);
+        } else if (auto bitmap = m_image_loader.bitmap()) {
+            context.painter().draw_scaled_bitmap(enclosing_int_rect(absolute_rect()), *bitmap, bitmap->rect());
+        }
+    }
+}
+
+bool ImageBox::renders_as_alt_text() const
+{
+    if (is<HTML::HTMLImageElement>(dom_node()))
+        return !m_image_loader.has_image();
+    return false;
+}
+
+void ImageBox::set_visible_in_viewport(Badge<Layout::InitialContainingBlockBox>, bool visible_in_viewport)
+{
+    m_image_loader.set_visible_in_viewport(visible_in_viewport);
+}
+
+}