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/*
* Copyright (c) 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 <LibWeb/CSS/Length.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/HTMLHtmlElement.h>
#include <LibWeb/Page/Frame.h>
namespace Web::CSS {
float Length::relative_length_to_px(const Layout::Node& layout_node) const
{
switch (m_type) {
case Type::Ex:
return m_value * layout_node.specified_style().font().x_height();
case Type::Em:
return m_value * layout_node.font_size();
case Type::Rem:
return m_value * layout_node.document().document_element()->layout_node()->font_size();
case Type::Vw:
return layout_node.document().frame()->viewport_rect().width() * (m_value / 100);
case Type::Vh:
return layout_node.document().frame()->viewport_rect().height() * (m_value / 100);
case Type::Vmin: {
auto viewport = layout_node.document().frame()->viewport_rect();
return min(viewport.width(), viewport.height()) * (m_value / 100);
}
case Type::Vmax: {
auto viewport = layout_node.document().frame()->viewport_rect();
return max(viewport.width(), viewport.height()) * (m_value / 100);
}
default:
ASSERT_NOT_REACHED();
}
}
const char* Length::unit_name() const
{
switch (m_type) {
case Type::Cm:
return "cm";
case Type::In:
return "in";
case Type::Px:
return "px";
case Type::Pt:
return "pt";
case Type::Mm:
return "mm";
case Type::Q:
return "Q";
case Type::Pc:
return "pc";
case Type::Ex:
return "ex";
case Type::Em:
return "em";
case Type::Rem:
return "rem";
case Type::Auto:
return "auto";
case Type::Percentage:
return "%";
case Type::Undefined:
return "undefined";
case Type::Vh:
return "vh";
case Type::Vw:
return "vw";
case Type::Vmax:
return "vmax";
case Type::Vmin:
return "vmin";
}
ASSERT_NOT_REACHED();
}
}
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