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content / common / font_list_fontconfig.cc [blame]
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <array>
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/342213636): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include <fontconfig/fontconfig.h>
#include <memory>
#include <set>
#include <string>
#include <utility>
#include "base/values.h"
#include "content/common/font_list.h"
namespace content {
std::unique_ptr<FcPattern, decltype(&FcPatternDestroy)> CreateFormatPattern(
const char* format) {
std::unique_ptr<FcPattern, decltype(&FcPatternDestroy)> pattern(
FcPatternCreate(), FcPatternDestroy);
FcPatternAddBool(pattern.get(), FC_SCALABLE, FcTrue);
FcPatternAddString(pattern.get(), FC_FONTFORMAT,
reinterpret_cast<const FcChar8*>(format));
return pattern;
}
base::Value::List GetFontList_SlowBlocking() {
DCHECK(GetFontListTaskRunner()->RunsTasksInCurrentSequence());
base::Value::List font_list;
std::unique_ptr<FcObjectSet, decltype(&FcObjectSetDestroy)> object_set(
FcObjectSetBuild(FC_FAMILY, NULL), FcObjectSetDestroy);
std::set<std::string> sorted_families;
// See https://www.freetype.org/freetype2/docs/reference/ft2-font_formats.html
// for the list of possible formats.
for (const char* allowed_format : {"TrueType", "CFF"}) {
auto format_pattern = CreateFormatPattern(allowed_format);
std::unique_ptr<FcFontSet, decltype(&FcFontSetDestroy)> fontset(
FcFontList(nullptr, format_pattern.get(), object_set.get()),
FcFontSetDestroy);
for (int j = 0; j < fontset->nfont; ++j) {
char* family_string;
FcPatternGetString(fontset->fonts[j], FC_FAMILY, 0,
reinterpret_cast<FcChar8**>(&family_string));
sorted_families.insert(family_string);
}
}
// For backwards compatibility with the older pango implementation, add the
// three Fontconfig aliases that pango added. Our linux default settings for
// fixed-width was "Monospace". If we remove that, this entry is not found in
// the list anymore, see also:
// https://git.gnome.org/browse/pango/tree/pango/pangofc-fontmap.c?h=1.40.1#n1351
sorted_families.insert("Monospace");
sorted_families.insert("Sans");
sorted_families.insert("Serif");
for (const auto& family : sorted_families) {
base::Value::List font_item;
font_item.Append(family);
font_item.Append(family); // localized name.
// TODO(yusukes): Support localized family names.
font_list.Append(std::move(font_item));
}
return font_list;
}
} // namespace content