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ecacab8618
This patch also adds the ability for Length to contain percentage values. This is a little off-spec, but will make storing and dealing with lengths a lot easier. To resolve a Length to a px-or-auto Length, there are now helpers for that. After calling them, you no longer have to think about em, rem, %, and such things.
64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibWeb/CSS/Length.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/HTMLHtmlElement.h>
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namespace Web {
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float Length::relative_length_to_px(const LayoutNode& layout_node) const
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{
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switch (m_type) {
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case Type::Em:
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return m_value * layout_node.font_size();
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case Type::Rem:
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return m_value * layout_node.document().document_element()->layout_node()->font_size();
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default:
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ASSERT_NOT_REACHED();
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}
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}
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const char* Length::unit_name() const
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{
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switch (m_type) {
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case Type::Px:
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return "px";
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case Type::Em:
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return "em";
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case Type::Rem:
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return "rem";
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case Type::Auto:
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return "auto";
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case Type::Percentage:
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return "percentage";
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case Type::Undefined:
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return "undefined";
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}
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ASSERT_NOT_REACHED();
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}
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}
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