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The `layout-test-mode` flag changes the font to be SerenitySans as this is the font used for layout tests for cross-platform compatibility of tests.
137 lines
6.7 KiB
C++
137 lines
6.7 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2023, Linus Groh <linusg@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 "FontPluginQt.h"
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#include <AK/DeprecatedString.h>
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#include <AK/String.h>
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#include <LibCore/StandardPaths.h>
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#include <LibGfx/Font/Emoji.h>
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#include <LibGfx/Font/FontDatabase.h>
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#include <QFont>
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#include <QFontInfo>
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extern DeprecatedString s_serenity_resource_root;
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namespace Ladybird {
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FontPluginQt::FontPluginQt(bool is_layout_test_mode)
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: m_is_layout_test_mode(is_layout_test_mode)
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{
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// Load the default SerenityOS fonts...
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Gfx::FontDatabase::set_default_fonts_lookup_path(DeprecatedString::formatted("{}/res/fonts", s_serenity_resource_root));
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// ...and also anything we can find in the system's font directories
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for (auto const& path : Core::StandardPaths::font_directories().release_value_but_fixme_should_propagate_errors())
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Gfx::FontDatabase::the().load_all_fonts_from_path(path.to_deprecated_string());
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Gfx::FontDatabase::set_default_font_query("Katica 10 400 0");
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Gfx::FontDatabase::set_fixed_width_font_query("Csilla 10 400 0");
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Gfx::Emoji::set_emoji_lookup_path(String::formatted("{}/res/emoji", s_serenity_resource_root).release_value_but_fixme_should_propagate_errors());
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update_generic_fonts();
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auto default_font_name = generic_font_name(Web::Platform::GenericFont::UiSansSerif);
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m_default_font = Gfx::FontDatabase::the().get(default_font_name, 12.0, 400, Gfx::FontWidth::Normal, 0);
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VERIFY(m_default_font);
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auto default_fixed_width_font_name = generic_font_name(Web::Platform::GenericFont::UiMonospace);
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m_default_fixed_width_font = Gfx::FontDatabase::the().get(default_fixed_width_font_name, 12.0, 400, Gfx::FontWidth::Normal, 0);
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VERIFY(m_default_fixed_width_font);
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}
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FontPluginQt::~FontPluginQt() = default;
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Gfx::Font& FontPluginQt::default_font()
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{
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return *m_default_font;
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}
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Gfx::Font& FontPluginQt::default_fixed_width_font()
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{
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return *m_default_fixed_width_font;
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}
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void FontPluginQt::update_generic_fonts()
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{
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// How we choose which system font to use for each CSS font:
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// 1. Ask Qt via the QFont::StyleHint mechanism for the user's preferred font.
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// 2. Try loading that font through Gfx::FontDatabase
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// 3. If we don't support that font for whatever reason (e.g missing TrueType features in LibGfx)...
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// 1. Try a list of known-suitable fallback fonts with their names hard-coded below
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// 2. If that didn't work, fall back to Gfx::FontDatabase::default_font() (or default_fixed_width_font())
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// This is rather weird, but it's how things work right now, as we can only draw with fonts loaded by LibGfx.
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m_generic_font_names.resize(static_cast<size_t>(Web::Platform::GenericFont::__Count));
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auto update_mapping = [&](Web::Platform::GenericFont generic_font, QFont::StyleHint qfont_style_hint, ReadonlySpan<DeprecatedString> fallbacks) {
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if (m_is_layout_test_mode) {
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m_generic_font_names[static_cast<size_t>(generic_font)] = "SerenitySans";
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return;
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}
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QFont qt_font;
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qt_font.setStyleHint(qfont_style_hint);
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// NOTE: This is a workaround for setStyleHint being a no-op on X11 systems. See:
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// https://doc.qt.io/qt-6/qfont.html#setStyleHint
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if (generic_font == Web::Platform::GenericFont::Monospace)
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qt_font.setFamily("monospace");
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else if (generic_font == Web::Platform::GenericFont::Fantasy)
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qt_font.setFamily("fantasy");
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else if (generic_font == Web::Platform::GenericFont::Cursive)
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qt_font.setFamily("cursive");
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QFontInfo qt_info(qt_font);
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auto qt_font_family = qt_info.family();
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auto gfx_font = Gfx::FontDatabase::the().get(qt_font_family.toUtf8().data(), 16, 400, Gfx::FontWidth::Normal, 0, Gfx::Font::AllowInexactSizeMatch::Yes);
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if (!gfx_font) {
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for (auto& fallback : fallbacks) {
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gfx_font = Gfx::FontDatabase::the().get(fallback, 16, 400, Gfx::FontWidth::Normal, 0, Gfx::Font::AllowInexactSizeMatch::Yes);
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if (gfx_font)
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break;
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}
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}
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if (!gfx_font) {
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if (generic_font == Web::Platform::GenericFont::Monospace || generic_font == Web::Platform::GenericFont::UiMonospace)
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gfx_font = Gfx::FontDatabase::default_fixed_width_font();
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else
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gfx_font = Gfx::FontDatabase::default_font();
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}
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m_generic_font_names[static_cast<size_t>(generic_font)] = gfx_font->family();
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};
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// Fallback fonts to look for if Gfx::Font can't load the font suggested by Qt.
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// The lists are basically arbitrary, taken from https://www.w3.org/Style/Examples/007/fonts.en.html
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Vector<DeprecatedString> cursive_fallbacks { "Comic Sans MS", "Comic Sans", "Apple Chancery", "Bradley Hand", "Brush Script MT", "Snell Roundhand", "URW Chancery L" };
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Vector<DeprecatedString> fantasy_fallbacks { "Impact", "Luminari", "Chalkduster", "Jazz LET", "Blippo", "Stencil Std", "Marker Felt", "Trattatello" };
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Vector<DeprecatedString> monospace_fallbacks { "Andale Mono", "Courier New", "Courier", "FreeMono", "OCR A Std", "DejaVu Sans Mono", "Liberation Mono", "Csilla" };
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Vector<DeprecatedString> sans_serif_fallbacks { "Arial", "Helvetica", "Verdana", "Trebuchet MS", "Gill Sans", "Noto Sans", "Avantgarde", "Optima", "Arial Narrow", "Liberation Sans", "Katica" };
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Vector<DeprecatedString> serif_fallbacks { "Times", "Times New Roman", "Didot", "Georgia", "Palatino", "Bookman", "New Century Schoolbook", "American Typewriter", "Liberation Serif", "Roman" };
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update_mapping(Web::Platform::GenericFont::Cursive, QFont::StyleHint::Cursive, cursive_fallbacks);
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update_mapping(Web::Platform::GenericFont::Fantasy, QFont::StyleHint::Fantasy, fantasy_fallbacks);
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update_mapping(Web::Platform::GenericFont::Monospace, QFont::StyleHint::Monospace, monospace_fallbacks);
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update_mapping(Web::Platform::GenericFont::SansSerif, QFont::StyleHint::SansSerif, sans_serif_fallbacks);
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update_mapping(Web::Platform::GenericFont::Serif, QFont::StyleHint::Serif, serif_fallbacks);
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update_mapping(Web::Platform::GenericFont::UiMonospace, QFont::StyleHint::Monospace, monospace_fallbacks);
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update_mapping(Web::Platform::GenericFont::UiRounded, QFont::StyleHint::SansSerif, sans_serif_fallbacks);
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update_mapping(Web::Platform::GenericFont::UiSansSerif, QFont::StyleHint::SansSerif, sans_serif_fallbacks);
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update_mapping(Web::Platform::GenericFont::UiSerif, QFont::StyleHint::Serif, serif_fallbacks);
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}
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DeprecatedString FontPluginQt::generic_font_name(Web::Platform::GenericFont generic_font)
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{
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return m_generic_font_names[static_cast<size_t>(generic_font)];
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}
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}
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