9bd4add734
This seems mostly harmless and matches what CSS expects from us at the moment. Eventually our CSS font selection will become more sophisticated and stop relying on Gfx::FontDatabase for things like this, but for now it's a simple stopgap that lets websites do "font-family: arial" :^)
263 lines
8.6 KiB
C++
263 lines
8.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/DeprecatedFlyString.h>
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#include <AK/Queue.h>
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#include <AK/QuickSort.h>
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#include <LibCore/DirIterator.h>
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#include <LibFileSystem/FileSystem.h>
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#include <LibGfx/Font/Font.h>
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#include <LibGfx/Font/FontDatabase.h>
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#include <LibGfx/Font/OpenType/Font.h>
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#include <LibGfx/Font/Typeface.h>
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#include <LibGfx/Font/WOFF/Font.h>
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namespace Gfx {
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FontDatabase& FontDatabase::the()
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{
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static FontDatabase s_the;
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return s_the;
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}
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static RefPtr<Font> s_default_font;
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static DeprecatedString s_default_font_query;
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static RefPtr<Font> s_window_title_font;
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static DeprecatedString s_window_title_font_query;
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static RefPtr<Font> s_fixed_width_font;
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static DeprecatedString s_fixed_width_font_query;
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static DeprecatedString s_default_fonts_lookup_path = "/res/fonts";
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void FontDatabase::set_default_font_query(DeprecatedString query)
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{
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if (s_default_font_query == query)
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return;
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s_default_font_query = move(query);
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s_default_font = nullptr;
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}
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DeprecatedString FontDatabase::default_font_query()
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{
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return s_default_font_query;
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}
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void FontDatabase::set_window_title_font_query(DeprecatedString query)
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{
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if (s_window_title_font_query == query)
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return;
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s_window_title_font_query = move(query);
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s_window_title_font = nullptr;
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}
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DeprecatedString FontDatabase::window_title_font_query()
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{
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return s_window_title_font_query;
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}
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void FontDatabase::set_default_fonts_lookup_path(DeprecatedString path)
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{
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if (s_default_fonts_lookup_path == path)
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return;
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s_default_fonts_lookup_path = move(path);
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}
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DeprecatedString FontDatabase::default_fonts_lookup_path()
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{
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return s_default_fonts_lookup_path;
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}
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Font& FontDatabase::default_font()
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{
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if (!s_default_font) {
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VERIFY(!s_default_font_query.is_empty());
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s_default_font = FontDatabase::the().get_by_name(s_default_font_query);
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VERIFY(s_default_font);
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}
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return *s_default_font;
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}
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Font& FontDatabase::window_title_font()
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{
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if (!s_window_title_font) {
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VERIFY(!s_window_title_font_query.is_empty());
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s_window_title_font = FontDatabase::the().get_by_name(s_window_title_font_query);
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VERIFY(s_window_title_font);
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}
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return *s_window_title_font;
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}
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void FontDatabase::set_fixed_width_font_query(DeprecatedString query)
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{
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if (s_fixed_width_font_query == query)
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return;
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s_fixed_width_font_query = move(query);
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s_fixed_width_font = nullptr;
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}
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DeprecatedString FontDatabase::fixed_width_font_query()
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{
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return s_fixed_width_font_query;
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}
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Font& FontDatabase::default_fixed_width_font()
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{
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if (!s_fixed_width_font) {
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VERIFY(!s_fixed_width_font_query.is_empty());
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s_fixed_width_font = FontDatabase::the().get_by_name(s_fixed_width_font_query);
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VERIFY(s_fixed_width_font);
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}
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return *s_fixed_width_font;
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}
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struct FontDatabase::Private {
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HashMap<DeprecatedString, NonnullRefPtr<Gfx::Font>, CaseInsensitiveStringTraits> full_name_to_font_map;
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HashMap<DeprecatedFlyString, Vector<NonnullRefPtr<Typeface>>, CaseInsensitiveStringTraits> typefaces;
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};
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void FontDatabase::load_all_fonts_from_path(DeprecatedString const& root)
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{
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Queue<DeprecatedString> path_queue;
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path_queue.enqueue(root);
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while (!path_queue.is_empty()) {
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auto current_directory = path_queue.dequeue();
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Core::DirIterator dir_iterator(current_directory, Core::DirIterator::SkipParentAndBaseDir);
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if (dir_iterator.has_error()) {
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dbgln("FontDatabase::load_all_fonts_from_path: {}", dir_iterator.error());
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continue;
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}
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while (dir_iterator.has_next()) {
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auto path = dir_iterator.next_full_path();
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if (FileSystem::is_directory(path)) {
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path_queue.enqueue(path);
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continue;
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}
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if (path.ends_with(".font"sv)) {
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if (auto font_or_error = Gfx::BitmapFont::try_load_from_file(path); !font_or_error.is_error()) {
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auto font = font_or_error.release_value();
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m_private->full_name_to_font_map.set(font->qualified_name(), *font);
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auto typeface = get_or_create_typeface(font->family(), font->variant());
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typeface->add_bitmap_font(font);
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}
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} else if (path.ends_with(".ttf"sv)) {
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// FIXME: What about .otf
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if (auto font_or_error = OpenType::Font::try_load_from_file(path); !font_or_error.is_error()) {
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auto font = font_or_error.release_value();
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auto typeface = get_or_create_typeface(font->family(), font->variant());
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typeface->set_vector_font(move(font));
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}
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} else if (path.ends_with(".woff"sv)) {
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if (auto font_or_error = WOFF::Font::try_load_from_file(path); !font_or_error.is_error()) {
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auto font = font_or_error.release_value();
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auto typeface = get_or_create_typeface(font->family(), font->variant());
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typeface->set_vector_font(move(font));
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}
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}
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}
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}
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}
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FontDatabase::FontDatabase()
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: m_private(make<Private>())
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{
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load_all_fonts_from_path(s_default_fonts_lookup_path);
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}
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void FontDatabase::for_each_font(Function<void(Gfx::Font const&)> callback)
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{
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Vector<RefPtr<Gfx::Font>> fonts;
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fonts.ensure_capacity(m_private->full_name_to_font_map.size());
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for (auto& it : m_private->full_name_to_font_map)
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fonts.append(it.value);
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quick_sort(fonts, [](auto& a, auto& b) { return a->qualified_name() < b->qualified_name(); });
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for (auto& font : fonts)
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callback(*font);
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}
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void FontDatabase::for_each_fixed_width_font(Function<void(Gfx::Font const&)> callback)
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{
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Vector<RefPtr<Gfx::Font>> fonts;
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fonts.ensure_capacity(m_private->full_name_to_font_map.size());
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for (auto& it : m_private->full_name_to_font_map) {
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if (it.value->is_fixed_width())
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fonts.append(it.value);
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}
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quick_sort(fonts, [](auto& a, auto& b) { return a->qualified_name() < b->qualified_name(); });
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for (auto& font : fonts)
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callback(*font);
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}
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RefPtr<Gfx::Font> FontDatabase::get_by_name(StringView name)
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{
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auto it = m_private->full_name_to_font_map.find(name);
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if (it == m_private->full_name_to_font_map.end()) {
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auto parts = name.split_view(" "sv);
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if (parts.size() >= 4) {
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auto slope = parts.take_last().to_int().value_or(0);
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auto weight = parts.take_last().to_int().value_or(0);
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auto size = parts.take_last().to_int().value_or(0);
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auto family = DeprecatedString::join(' ', parts);
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return get(family, size, weight, Gfx::FontWidth::Normal, slope);
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}
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dbgln("Font lookup failed: '{}'", name);
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return nullptr;
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}
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return it->value;
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}
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RefPtr<Gfx::Font> FontDatabase::get(DeprecatedFlyString const& family, float point_size, unsigned weight, unsigned width, unsigned slope, Font::AllowInexactSizeMatch allow_inexact_size_match)
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{
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auto it = m_private->typefaces.find(family);
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if (it == m_private->typefaces.end())
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return nullptr;
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for (auto const& typeface : it->value) {
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if (typeface->weight() == weight && typeface->width() == width && typeface->slope() == slope)
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return typeface->get_font(point_size, allow_inexact_size_match);
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}
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return nullptr;
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}
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RefPtr<Gfx::Font> FontDatabase::get(DeprecatedFlyString const& family, DeprecatedFlyString const& variant, float point_size, Font::AllowInexactSizeMatch allow_inexact_size_match)
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{
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auto it = m_private->typefaces.find(family);
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if (it == m_private->typefaces.end())
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return nullptr;
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for (auto const& typeface : it->value) {
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if (typeface->variant() == variant)
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return typeface->get_font(point_size, allow_inexact_size_match);
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}
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return nullptr;
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}
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RefPtr<Typeface> FontDatabase::get_or_create_typeface(DeprecatedString const& family, DeprecatedString const& variant)
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{
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auto it = m_private->typefaces.find(family);
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if (it != m_private->typefaces.end()) {
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for (auto const& typeface : it->value) {
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if (typeface->variant() == variant)
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return typeface;
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}
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}
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auto typeface = adopt_ref(*new Typeface(family, variant));
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m_private->typefaces.ensure(family).append(typeface);
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return typeface;
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}
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void FontDatabase::for_each_typeface(Function<void(Typeface const&)> callback)
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{
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for (auto const& it : m_private->typefaces) {
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for (auto const& jt : it.value) {
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callback(*jt);
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}
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}
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}
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}
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