LibWeb: Rename directory LibHTML => LibWeb

Let's rename this to LibWeb since it aims to provide more parts of the
web platform than just HTML. :^)

1 files changed, 81 insertions, 0 deletions

diff --git a/Libraries/LibWeb/Layout/LineBoxFragment.cpp b/Libraries/LibWeb/Layout/LineBoxFragment.cpp
new file mode 100644
index 0000000000..2d7a60c917
--- /dev/null
+++ b/Libraries/LibWeb/Layout/LineBoxFragment.cpp
@@ -0,0 +1,81 @@
+/*
+ * 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 <AK/Utf8View.h>
+#include <LibGUI/Painter.h>
+#include <LibWeb/Layout/LayoutDocument.h>
+#include <LibWeb/Layout/LayoutText.h>
+#include <LibWeb/Layout/LineBoxFragment.h>
+#include <LibWeb/RenderingContext.h>
+
+namespace Web {
+
+void LineBoxFragment::render(RenderingContext& context)
+{
+    for (auto* ancestor = layout_node().parent(); ancestor; ancestor = ancestor->parent()) {
+        if (!ancestor->is_visible())
+            return;
+    }
+
+    if (is<LayoutText>(layout_node())) {
+        to<LayoutText>(layout_node()).render_fragment(context, *this);
+    }
+}
+
+bool LineBoxFragment::is_justifiable_whitespace() const
+{
+    return text() == " ";
+}
+
+StringView LineBoxFragment::text() const
+{
+    if (!is<LayoutText>(layout_node()))
+        return {};
+    return to<LayoutText>(layout_node()).text_for_rendering().substring_view(m_start, m_length);
+}
+
+int LineBoxFragment::text_index_at(float x) const
+{
+    if (!layout_node().is_text())
+        return 0;
+    auto& layout_text = to<LayoutText>(layout_node());
+    auto& font = layout_text.style().font();
+    Utf8View view(text());
+
+    float relative_x = x - m_rect.location().x();
+    float glyph_spacing = font.glyph_spacing();
+
+    float width_so_far = 0;
+    for (auto it = view.begin(); it != view.end(); ++it) {
+        float glyph_width = font.glyph_or_emoji_width(*it);
+        if ((width_so_far + glyph_width + glyph_spacing) > relative_x)
+            return m_start + view.byte_offset_of(it);
+        width_so_far += glyph_width + glyph_spacing;
+    }
+    return m_start + m_length - 1;
+}
+
+}