mirror of
https://github.com/LadybirdBrowser/ladybird.git
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98 lines
4.8 KiB
C++
98 lines
4.8 KiB
C++
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/*
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* Copyright (c) 2022, 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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#define AK_DONT_REPLACE_STD
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#include "FontPluginQt.h"
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#include <AK/String.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 String s_serenity_resource_root;
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namespace Ladybird {
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FontPluginQt::FontPluginQt()
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{
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// Load the default SerenityOS fonts...
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Gfx::FontDatabase::set_default_fonts_lookup_path(String::formatted("{}/res/fonts", s_serenity_resource_root));
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// ...and also anything we can find in /usr/share/fonts
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Gfx::FontDatabase::the().load_all_fonts_from_path("/usr/share/fonts");
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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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update_generic_fonts();
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}
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FontPluginQt::~FontPluginQt() = default;
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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, Vector<String> fallbacks = {}) {
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QFont qt_font;
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qt_font.setStyleHint(qfont_style_hint);
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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, 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, 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<String> cursive_fallbacks { "Comic Sans MS", "Comic Sans", "Apple Chancery", "Bradley Hand", "Brush Script MT", "Snell Roundhand", "URW Chancery L" };
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Vector<String> fantasy_fallbacks { "Impact", "Luminari", "Chalkduster", "Jazz LET", "Blippo", "Stencil Std", "Marker Felt", "Trattatello" };
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Vector<String> monospace_fallbacks { "Andale Mono", "Courier New", "Courier", "FreeMono", "OCR A Std", "DejaVu Sans Mono", "Liberation Mono", "Csilla" };
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Vector<String> sans_serif_fallbacks { "Arial", "Helvetica", "Verdana", "Trebuchet MS", "Gill Sans", "Noto Sans", "Avantgarde", "Optima", "Arial Narrow", "Liberation Sans", "Katica" };
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Vector<String> 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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String 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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