Merge "Add native font enumeration API implementation"
This commit is contained in:
Seigo Nonaka
@@ -49,6 +49,7 @@ cc_library_shared {
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"sharedmem.cpp",
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"storage_manager.cpp",
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"surface_texture.cpp",
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"system_fonts.cpp",
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"trace.cpp",
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],
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@@ -65,6 +66,7 @@ cc_library_shared {
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"libandroid_runtime",
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"libnetd_client",
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"libhwui",
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"libxml2",
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],
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static_libs: [
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@@ -212,6 +212,18 @@ LIBANDROID {
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ASurfaceTexture_getTransformMatrix; # introduced=28
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ASurfaceTexture_release; # introduced=28
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ASurfaceTexture_updateTexImage; # introduced=28
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ASystemFontIterator_open; # introduced=29
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ASystemFontIterator_close; # introduced=29
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ASystemFontIterator_next; # introduced=29
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ASystemFont_close; # introduced=29
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ASystemFont_getFontFilePath; # introduced=29
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ASystemFont_getWeight; # introduced=29
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ASystemFont_isItalic; # introduced=29
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ASystemFont_getLocale; # introduced=29
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ASystemFont_getCollectionIndex; # introduced=29
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ASystemFont_getAxisCount; # introduced=29
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ASystemFont_getAxisTag; # introduced=29
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ASystemFont_getAxisValue; # introduced=29
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ATrace_beginSection; # introduced=23
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ATrace_endSection; # introduced=23
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ATrace_isEnabled; # introduced=23
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277
native/android/system_fonts.cpp
Normal file
277
native/android/system_fonts.cpp
Normal file
@@ -0,0 +1,277 @@
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <jni.h>
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#include <android/system_fonts.h>
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#include <memory>
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#include <string>
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#include <vector>
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#include <errno.h>
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#include <fcntl.h>
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#include <libxml/tree.h>
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#include <log/log.h>
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#include <sys/stat.h>
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#include <unistd.h>
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struct XmlCharDeleter {
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void operator()(xmlChar* b) { xmlFree(b); }
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};
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struct XmlDocDeleter {
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void operator()(xmlDoc* d) { xmlFreeDoc(d); }
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};
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using XmlCharUniquePtr = std::unique_ptr<xmlChar, XmlCharDeleter>;
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using XmlDocUniquePtr = std::unique_ptr<xmlDoc, XmlDocDeleter>;
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struct ASystemFontIterator {
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XmlDocUniquePtr mXmlDoc;
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xmlNode* mFontNode;
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};
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struct ASystemFont {
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std::string mFilePath;
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std::unique_ptr<std::string> mLocale;
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uint16_t mWeight;
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bool mItalic;
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uint32_t mCollectionIndex;
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std::vector<std::pair<uint32_t, float>> mAxes;
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};
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namespace {
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std::string xmlTrim(const std::string& in) {
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if (in.empty()) {
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return in;
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}
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const char XML_SPACES[] = "\u0020\u000D\u000A\u0009";
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const size_t start = in.find_first_not_of(XML_SPACES); // inclusive
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if (start == std::string::npos) {
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return "";
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}
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const size_t end = in.find_last_not_of(XML_SPACES); // inclusive
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if (end == std::string::npos) {
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return "";
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}
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return in.substr(start, end - start + 1 /* +1 since end is inclusive */);
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}
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const xmlChar* FAMILY_TAG = BAD_CAST("family");
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const xmlChar* FONT_TAG = BAD_CAST("font");
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xmlNode* firstElement(xmlNode* node, const xmlChar* tag) {
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for (xmlNode* child = node->children; child; child = child->next) {
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if (xmlStrEqual(child->name, tag)) {
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return child;
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}
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}
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return nullptr;
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}
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xmlNode* nextSibling(xmlNode* node, const xmlChar* tag) {
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while ((node = node->next) != nullptr) {
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if (xmlStrEqual(node->name, tag)) {
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return node;
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}
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}
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return nullptr;
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}
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void copyFont(ASystemFontIterator* ite, ASystemFont* out) {
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const xmlChar* LOCALE_ATTR_NAME = BAD_CAST("lang");
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XmlCharUniquePtr filePathStr(
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xmlNodeListGetString(ite->mXmlDoc.get(), ite->mFontNode->xmlChildrenNode, 1));
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out->mFilePath = "/system/fonts/" + xmlTrim(
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std::string(filePathStr.get(), filePathStr.get() + xmlStrlen(filePathStr.get())));
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const xmlChar* WEIGHT_ATTR_NAME = BAD_CAST("weight");
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XmlCharUniquePtr weightStr(xmlGetProp(ite->mFontNode, WEIGHT_ATTR_NAME));
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out->mWeight = weightStr ?
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strtol(reinterpret_cast<const char*>(weightStr.get()), nullptr, 10) : 400;
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const xmlChar* STYLE_ATTR_NAME = BAD_CAST("style");
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const xmlChar* ITALIC_ATTR_VALUE = BAD_CAST("italic");
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XmlCharUniquePtr styleStr(xmlGetProp(ite->mFontNode, STYLE_ATTR_NAME));
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out->mItalic = styleStr ? xmlStrEqual(styleStr.get(), ITALIC_ATTR_VALUE) : false;
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const xmlChar* INDEX_ATTR_NAME = BAD_CAST("index");
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XmlCharUniquePtr indexStr(xmlGetProp(ite->mFontNode, INDEX_ATTR_NAME));
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out->mCollectionIndex = indexStr ?
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strtol(reinterpret_cast<const char*>(indexStr.get()), nullptr, 10) : 0;
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XmlCharUniquePtr localeStr(xmlGetProp(ite->mXmlDoc->parent, LOCALE_ATTR_NAME));
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out->mLocale.reset(
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localeStr ? new std::string(reinterpret_cast<const char*>(localeStr.get())) : nullptr);
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const xmlChar* TAG_ATTR_NAME = BAD_CAST("tag");
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const xmlChar* STYLEVALUE_ATTR_NAME = BAD_CAST("stylevalue");
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const xmlChar* AXIS_TAG = BAD_CAST("axis");
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out->mAxes.clear();
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for (xmlNode* axis = firstElement(ite->mFontNode, AXIS_TAG); axis;
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axis = nextSibling(axis, AXIS_TAG)) {
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XmlCharUniquePtr tagStr(xmlGetProp(axis, TAG_ATTR_NAME));
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if (!tagStr || xmlStrlen(tagStr.get()) != 4) {
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continue; // Tag value must be 4 char string
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}
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XmlCharUniquePtr styleValueStr(xmlGetProp(axis, STYLEVALUE_ATTR_NAME));
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if (!styleValueStr) {
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continue;
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}
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uint32_t tag =
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static_cast<uint32_t>(tagStr.get()[0] << 24) |
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static_cast<uint32_t>(tagStr.get()[1] << 16) |
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static_cast<uint32_t>(tagStr.get()[2] << 8) |
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static_cast<uint32_t>(tagStr.get()[3]);
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float styleValue = strtod(reinterpret_cast<const char*>(styleValueStr.get()), nullptr);
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out->mAxes.push_back(std::make_pair(tag, styleValue));
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}
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}
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bool isFontFileAvailable(const std::string& filePath) {
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std::string fullPath = filePath;
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struct stat st = {};
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if (stat(fullPath.c_str(), &st) != 0) {
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return false;
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}
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return S_ISREG(st.st_mode);
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}
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xmlNode* findFirstFontNode(xmlDoc* doc) {
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xmlNode* familySet = xmlDocGetRootElement(doc);
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if (familySet == nullptr) {
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return nullptr;
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}
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xmlNode* family = firstElement(familySet, FAMILY_TAG);
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if (family == nullptr) {
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return nullptr;
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}
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xmlNode* font = firstElement(family, FONT_TAG);
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while (font == nullptr) {
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family = nextSibling(family, FAMILY_TAG);
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if (family == nullptr) {
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return nullptr;
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}
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font = firstElement(family, FONT_TAG);
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}
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return font;
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}
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} // namespace
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ASystemFontIterator* ASystemFontIterator_open() {
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std::unique_ptr<ASystemFontIterator> ite(new ASystemFontIterator());
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ite->mXmlDoc.reset(xmlReadFile("/system/etc/fonts.xml", nullptr, 0));
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return ite.release();
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}
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void ASystemFontIterator_close(ASystemFontIterator* ite) {
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delete ite;
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}
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ASystemFont* ASystemFontIterator_next(ASystemFontIterator* ite) {
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LOG_ALWAYS_FATAL_IF(ite == nullptr, "nullptr has passed as iterator argument");
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if (ite->mFontNode == nullptr) {
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if (ite->mXmlDoc == nullptr) {
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return nullptr; // Already at the end.
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} else {
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// First time to query font.
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ite->mFontNode = findFirstFontNode(ite->mXmlDoc.get());
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if (ite->mFontNode == nullptr) {
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ite->mXmlDoc.reset();
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return nullptr; // No font node found.
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}
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std::unique_ptr<ASystemFont> font = std::make_unique<ASystemFont>();
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copyFont(ite, font.get());
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return font.release();
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}
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} else {
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xmlNode* nextNode = nextSibling(ite->mFontNode, FONT_TAG);
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while (nextNode == nullptr) {
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xmlNode* family = nextSibling(ite->mFontNode->parent, FAMILY_TAG);
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if (family == nullptr) {
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break;
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}
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nextNode = firstElement(family, FONT_TAG);
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}
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ite->mFontNode = nextNode;
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if (nextNode == nullptr) {
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ite->mXmlDoc.reset();
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return nullptr;
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}
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std::unique_ptr<ASystemFont> font = std::make_unique<ASystemFont>();
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copyFont(ite, font.get());
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if (!isFontFileAvailable(font->mFilePath)) {
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// fonts.xml intentionally contains missing font configuration. Skip it.
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return ASystemFontIterator_next(ite);
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}
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return font.release();
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}
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}
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void ASystemFont_close(ASystemFont* font) {
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delete font;
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}
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const char* ASystemFont_getFontFilePath(const ASystemFont* font) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed as font argument");
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return font->mFilePath.c_str();
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}
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uint16_t ASystemFont_getWeight(const ASystemFont* font) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed as font argument");
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return font->mWeight;
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}
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bool ASystemFont_isItalic(const ASystemFont* font) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed as font argument");
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return font->mItalic;
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}
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const char* ASystemFont_getLocale(const ASystemFont* font) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed to font argument");
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return font->mLocale ? nullptr : font->mLocale->c_str();
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}
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size_t ASystemFont_getCollectionIndex(const ASystemFont* font) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed to font argument");
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return font->mCollectionIndex;
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}
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size_t ASystemFont_getAxisCount(const ASystemFont* font) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed to font argument");
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return font->mAxes.size();
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}
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uint32_t ASystemFont_getAxisTag(const ASystemFont* font, uint32_t axisIndex) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed to font argument");
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LOG_ALWAYS_FATAL_IF(axisIndex >= font->mAxes.size(),
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"given axis index is out of bounds. (< %zd", font->mAxes.size());
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return font->mAxes[axisIndex].first;
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}
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float ASystemFont_getAxisValue(const ASystemFont* font, uint32_t axisIndex) {
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LOG_ALWAYS_FATAL_IF(font == nullptr, "nullptr has passed to font argument");
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LOG_ALWAYS_FATAL_IF(axisIndex >= font->mAxes.size(),
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"given axis index is out of bounds. (< %zd", font->mAxes.size());
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return font->mAxes[axisIndex].second;
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}
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