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/*
* 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 <LibCore/DirIterator.h>
#include <LibWeb/CSS/StyleProperties.h>
#include <LibWeb/FontCache.h>
#include <ctype.h>
namespace Web {
StyleProperties::StyleProperties()
{
}
StyleProperties::StyleProperties(const StyleProperties& other)
: m_property_values(other.m_property_values)
{
if (other.m_font) {
m_font = other.m_font->clone();
} else {
m_font = nullptr;
}
}
NonnullRefPtr<StyleProperties> StyleProperties::clone() const
{
return adopt(*new StyleProperties(*this));
}
void StyleProperties::set_property(CSS::PropertyID id, NonnullRefPtr<StyleValue> value)
{
m_property_values.set((unsigned)id, move(value));
}
Optional<NonnullRefPtr<StyleValue>> StyleProperties::property(CSS::PropertyID id) const
{
auto it = m_property_values.find((unsigned)id);
if (it == m_property_values.end())
return {};
return it->value;
}
Length StyleProperties::length_or_fallback(CSS::PropertyID id, const Length& fallback) const
{
auto value = property(id);
if (!value.has_value())
return fallback;
return value.value()->to_length();
}
Length StyleProperties::length_or_fallback(CSS::PropertyID id, const Length& fallback, float reference_for_percentages) const
{
auto value = property(id);
if (!value.has_value())
return fallback;
if (value.value()->is_percentage())
return static_cast<const PercentageStyleValue&>(*value.value()).to_length(reference_for_percentages);
return value.value()->to_length();
}
String StyleProperties::string_or_fallback(CSS::PropertyID id, const StringView& fallback) const
{
auto value = property(id);
if (!value.has_value())
return fallback;
return value.value()->to_string();
}
Color StyleProperties::color_or_fallback(CSS::PropertyID id, const Document& document, Color fallback) const
{
auto value = property(id);
if (!value.has_value())
return fallback;
return value.value()->to_color(document);
}
void StyleProperties::load_font() const
{
auto font_family = string_or_fallback(CSS::PropertyID::FontFamily, "Katica");
auto font_weight = string_or_fallback(CSS::PropertyID::FontWeight, "normal");
if (auto cached_font = FontCache::the().get({ font_family, font_weight })) {
m_font = cached_font;
return;
}
String weight;
if (font_weight == "lighter")
weight = "Thin";
else if (font_weight == "normal")
weight = "";
else if (font_weight == "bold")
weight = "Bold";
else {
dbg() << "Unknown font-weight: " << font_weight;
weight = "";
}
auto look_for_file = [](const StringView& expected_name) -> String {
// TODO: handle font sizes properly?
Core::DirIterator it { "/res/fonts/", Core::DirIterator::Flags::SkipDots };
while (it.has_next()) {
String name = it.next_path();
if (!name.ends_with(".font"))
continue;
if (!name.starts_with(expected_name))
continue;
// Check that a numeric size immediately
// follows the font name. This prevents,
// for example, matching KaticaBold when
// the regular Katica is requested.
if (!isdigit(name[expected_name.length()]))
continue;
return name;
}
return {};
};
// FIXME: Do this properly, with quote handling etc.
for (auto& font_name : font_family.split(',')) {
font_name = font_name.trim_whitespace();
if (font_name == "monospace")
font_name = "Csilla";
auto file_name = look_for_file(String::format("%s%s", font_name.characters(), weight.characters()));
if (file_name.is_null() && weight == "")
file_name = look_for_file(String::format("%sRegular", font_name.characters()));
if (file_name.is_null())
continue;
#ifdef HTML_DEBUG
dbg() << "Found font " << file_name << " for family " << font_family << " weight " << font_weight;
#endif
m_font = Gfx::Font::load_from_file(String::format("/res/fonts/%s", file_name.characters()));
FontCache::the().set({ font_name, font_weight }, *m_font);
return;
}
#ifdef HTML_DEBUG
dbg() << "Failed to find a font for family " << font_family << " weight " << font_weight;
#endif
if (font_weight == "bold")
m_font = Gfx::Font::default_bold_font();
else
m_font = Gfx::Font::default_font();
return;
}
float StyleProperties::line_height() const
{
auto line_height_length = length_or_fallback(CSS::PropertyID::LineHeight, {});
if (line_height_length.is_absolute())
return (float)font().glyph_height() * line_height_length.to_px();
return (float)font().glyph_height() * 1.4f;
}
CSS::Position StyleProperties::position() const
{
if (property(CSS::PropertyID::Position).has_value()) {
String position_string = string_or_fallback(CSS::PropertyID::Position, "static");
if (position_string == "relative")
return CSS::Position::Relative;
if (position_string == "absolute")
return CSS::Position::Absolute;
if (position_string == "sticky")
return CSS::Position::Sticky;
if (position_string == "fixed")
return CSS::Position::Fixed;
}
return CSS::Position::Static;
}
bool StyleProperties::operator==(const StyleProperties& other) const
{
if (m_property_values.size() != other.m_property_values.size())
return false;
for (auto& it : m_property_values) {
auto jt = other.m_property_values.find(it.key);
if (jt == other.m_property_values.end())
return false;
auto& my_value = *it.value;
auto& other_value = *jt->value;
if (my_value.type() != other_value.type())
return false;
if (my_value.to_string() != other_value.to_string())
return false;
}
return true;
}
}
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