19144b753a
Undefined length values can default to auto in all length boxes and we'll get the values we need. This saves us from having to deal with undefined lengths later on in layout. At some point we should break the style application process into a few more formal steps, but this at least simplifies some things.
352 lines
12 KiB
C++
352 lines
12 KiB
C++
/*
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* Copyright (c) 2018-2020, 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 <LibCore/DirIterator.h>
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#include <LibWeb/CSS/StyleProperties.h>
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#include <LibWeb/FontCache.h>
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#include <ctype.h>
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namespace Web::CSS {
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StyleProperties::StyleProperties()
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{
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}
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StyleProperties::StyleProperties(const StyleProperties& other)
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: m_property_values(other.m_property_values)
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{
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if (other.m_font) {
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m_font = other.m_font->clone();
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} else {
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m_font = nullptr;
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}
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}
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NonnullRefPtr<StyleProperties> StyleProperties::clone() const
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{
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return adopt(*new StyleProperties(*this));
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}
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void StyleProperties::set_property(CSS::PropertyID id, NonnullRefPtr<StyleValue> value)
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{
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m_property_values.set((unsigned)id, move(value));
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}
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void StyleProperties::set_property(CSS::PropertyID id, const StringView& value)
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{
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m_property_values.set((unsigned)id, StringStyleValue::create(value));
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}
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Optional<NonnullRefPtr<StyleValue>> StyleProperties::property(CSS::PropertyID id) const
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{
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auto it = m_property_values.find((unsigned)id);
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if (it == m_property_values.end())
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return {};
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return it->value;
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}
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Length StyleProperties::length_or_fallback(CSS::PropertyID id, const Length& fallback) const
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{
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auto value = property(id);
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if (!value.has_value())
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return fallback;
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return value.value()->to_length();
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}
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LengthBox StyleProperties::length_box(CSS::PropertyID left_id, CSS::PropertyID top_id, CSS::PropertyID right_id, CSS::PropertyID bottom_id) const
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{
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LengthBox box;
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box.left = length_or_fallback(left_id, CSS::Length::make_auto());
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box.top = length_or_fallback(top_id, CSS::Length::make_auto());
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box.right = length_or_fallback(right_id, CSS::Length::make_auto());
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box.bottom = length_or_fallback(bottom_id, CSS::Length::make_auto());
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return box;
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}
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String StyleProperties::string_or_fallback(CSS::PropertyID id, const StringView& fallback) const
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{
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auto value = property(id);
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if (!value.has_value())
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return fallback;
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return value.value()->to_string();
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}
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Color StyleProperties::color_or_fallback(CSS::PropertyID id, const DOM::Document& document, Color fallback) const
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{
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auto value = property(id);
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if (!value.has_value())
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return fallback;
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return value.value()->to_color(document);
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}
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void StyleProperties::load_font() const
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{
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auto font_family = string_or_fallback(CSS::PropertyID::FontFamily, "Katica");
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auto font_weight = string_or_fallback(CSS::PropertyID::FontWeight, "normal");
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if (auto cached_font = FontCache::the().get({ font_family, font_weight })) {
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m_font = cached_font;
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return;
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}
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String weight;
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if (font_weight == "lighter")
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weight = "Thin";
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else if (font_weight == "normal")
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weight = "Regular";
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else if (font_weight == "bold")
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weight = "Bold";
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else {
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dbg() << "Unknown font-weight: " << font_weight;
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weight = "";
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}
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auto look_for_file = [](const StringView& expected_name) -> String {
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// TODO: handle font sizes properly?
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Core::DirIterator it { "/res/fonts/", Core::DirIterator::Flags::SkipDots };
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while (it.has_next()) {
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String name = it.next_path();
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if (!name.ends_with(".font"))
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continue;
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if (!name.starts_with(expected_name))
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continue;
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// Check that a numeric size immediately
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// follows the font name. This prevents,
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// for example, matching KaticaBold when
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// the regular Katica is requested.
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if (!isdigit(name[expected_name.length()]))
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continue;
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return name;
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}
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return {};
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};
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// FIXME: Do this properly, with quote handling etc.
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for (auto& font_name : font_family.split(',')) {
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font_name = font_name.trim_whitespace();
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if (font_name == "monospace")
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font_name = "Csilla";
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auto file_name = look_for_file(String::format("%s%s", font_name.characters(), weight.characters()));
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if (file_name.is_null() && weight == "")
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file_name = look_for_file(String::format("%sRegular", font_name.characters()));
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if (file_name.is_null())
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continue;
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m_font = Gfx::Font::load_from_file(String::format("/res/fonts/%s", file_name.characters()));
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FontCache::the().set({ font_name, font_weight }, *m_font);
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return;
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}
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if (font_weight == "bold")
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m_font = Gfx::Font::default_bold_font();
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else
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m_font = Gfx::Font::default_font();
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// FIXME: This is a hack to stop chewing CPU on sites that use a font we don't have and have a lot of text
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// or changes text often. Examples are the Serenity 2nd birthday page and the JS specification.
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FontCache::the().set({ font_family, font_weight }, *m_font);
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}
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float StyleProperties::line_height(const Layout::Node& layout_node) const
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{
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auto line_height_length = length_or_fallback(CSS::PropertyID::LineHeight, Length::make_auto());
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if (line_height_length.is_absolute())
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return (float)line_height_length.to_px(layout_node);
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return (float)font().glyph_height() * 1.4f;
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}
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Optional<int> StyleProperties::z_index() const
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{
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auto value = property(CSS::PropertyID::ZIndex);
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if (!value.has_value())
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return {};
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return static_cast<int>(value.value()->to_length().raw_value());
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}
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CSS::Position StyleProperties::position() const
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{
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if (property(CSS::PropertyID::Position).has_value()) {
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String position_string = string_or_fallback(CSS::PropertyID::Position, "static");
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if (position_string == "relative")
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return CSS::Position::Relative;
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if (position_string == "absolute")
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return CSS::Position::Absolute;
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if (position_string == "sticky")
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return CSS::Position::Sticky;
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if (position_string == "fixed")
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return CSS::Position::Fixed;
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}
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return CSS::Position::Static;
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}
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bool StyleProperties::operator==(const StyleProperties& other) const
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{
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if (m_property_values.size() != other.m_property_values.size())
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return false;
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for (auto& it : m_property_values) {
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auto jt = other.m_property_values.find(it.key);
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if (jt == other.m_property_values.end())
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return false;
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auto& my_value = *it.value;
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auto& other_value = *jt->value;
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if (my_value.type() != other_value.type())
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return false;
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if (my_value.to_string() != other_value.to_string())
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return false;
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}
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return true;
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}
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CSS::TextAlign StyleProperties::text_align() const
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{
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auto string = string_or_fallback(CSS::PropertyID::TextAlign, "left");
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if (string == "center")
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return CSS::TextAlign::Center;
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if (string == "right")
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return CSS::TextAlign::Right;
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if (string == "justify")
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return CSS::TextAlign::Justify;
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if (string == "-libweb-center")
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return CSS::TextAlign::VendorSpecificCenter;
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// Otherwise, just assume "left"..
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return CSS::TextAlign::Left;
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}
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Optional<CSS::WhiteSpace> StyleProperties::white_space() const
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{
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auto value = property(CSS::PropertyID::WhiteSpace);
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if (!value.has_value() || !value.value()->is_string())
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return {};
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auto string = value.value()->to_string();
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if (string == "normal")
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return CSS::WhiteSpace::Normal;
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if (string == "nowrap")
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return CSS::WhiteSpace::Nowrap;
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if (string == "pre")
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return CSS::WhiteSpace::Pre;
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if (string == "pre-line")
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return CSS::WhiteSpace::PreLine;
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if (string == "pre-wrap")
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return CSS::WhiteSpace::PreWrap;
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return {};
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}
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Optional<CSS::LineStyle> StyleProperties::line_style(CSS::PropertyID property_id) const
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{
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auto value = property(property_id);
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if (!value.has_value() || !value.value()->is_string())
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return {};
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auto string = value.value()->to_string();
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if (string == "none")
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return CSS::LineStyle::None;
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if (string == "hidden")
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return CSS::LineStyle::Hidden;
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if (string == "dotted")
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return CSS::LineStyle::Dotted;
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if (string == "dashed")
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return CSS::LineStyle::Dashed;
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if (string == "solid")
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return CSS::LineStyle::Solid;
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if (string == "double")
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return CSS::LineStyle::Double;
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if (string == "groove")
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return CSS::LineStyle::Groove;
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if (string == "ridge")
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return CSS::LineStyle::Ridge;
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if (string == "inset")
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return CSS::LineStyle::Inset;
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if (string == "outset")
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return CSS::LineStyle::Outset;
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return {};
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}
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Optional<CSS::Float> StyleProperties::float_() const
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{
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auto value = property(CSS::PropertyID::Float);
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if (!value.has_value() || !value.value()->is_string())
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return {};
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auto string = value.value()->to_string();
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if (string == "none")
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return CSS::Float::None;
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if (string == "left")
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return CSS::Float::Left;
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if (string == "right")
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return CSS::Float::Right;
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return {};
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}
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Optional<CSS::Clear> StyleProperties::clear() const
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{
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auto value = property(CSS::PropertyID::Clear);
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if (!value.has_value() || !value.value()->is_string())
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return {};
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auto string = value.value()->to_string();
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if (string == "none")
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return CSS::Clear::None;
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if (string == "left")
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return CSS::Clear::Left;
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if (string == "right")
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return CSS::Clear::Right;
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if (string == "both")
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return CSS::Clear::Both;
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return {};
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}
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CSS::Display StyleProperties::display() const
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{
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auto display = string_or_fallback(CSS::PropertyID::Display, "inline");
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if (display == "none")
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return CSS::Display::None;
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if (display == "block")
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return CSS::Display::Block;
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if (display == "inline")
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return CSS::Display::Inline;
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if (display == "inline-block")
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return CSS::Display::InlineBlock;
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if (display == "list-item")
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return CSS::Display::ListItem;
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if (display == "table")
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return CSS::Display::Table;
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if (display == "table-row")
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return CSS::Display::TableRow;
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if (display == "table-cell")
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return CSS::Display::TableCell;
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if (display == "table-row-group")
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return CSS::Display::TableRowGroup;
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if (display == "table-header-group")
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return CSS::Display::TableHeaderGroup;
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if (display == "table-footer-group")
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return CSS::Display::TableFooterGroup;
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dbg() << "Unknown display type: _" << display << "_";
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return CSS::Display::Block;
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}
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}
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