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android_frameworks_base/tools/aapt2/ResourceParser.cpp
Adam Lesinski 467f171315 AAPT2: Fail compiling when private symbols are referenced 
Also moved some XML specific stuff into its own directory,
and refactored ReferenceLinker a bit.

Change-Id: I912247a82023c1bbf72dc191fbdaf62858cbec0c
2015-11-19 14:46:53 -08:00

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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ResourceParser.h"
#include "ResourceTable.h"
#include "ResourceUtils.h"
#include "ResourceValues.h"
#include "ValueVisitor.h"
#include "util/Util.h"
#include "xml/XmlPullParser.h"
#include <sstream>
namespace aapt {
constexpr const char16_t* sXliffNamespaceUri = u"urn:oasis:names:tc:xliff:document:1.2";
/**
* Returns true if the element is <skip> or <eat-comment> and can be safely ignored.
*/
static bool shouldIgnoreElement(const StringPiece16& ns, const StringPiece16& name) {
return ns.empty() && (name == u"skip" || name == u"eat-comment");
}
ResourceParser::ResourceParser(IDiagnostics* diag, ResourceTable* table, const Source& source,
const ConfigDescription& config,
const ResourceParserOptions& options) :
mDiag(diag), mTable(table), mSource(source), mConfig(config), mOptions(options) {
}
/**
* Build a string from XML that converts nested elements into Span objects.
*/
bool ResourceParser::flattenXmlSubtree(xml::XmlPullParser* parser, std::u16string* outRawString,
StyleString* outStyleString) {
std::vector<Span> spanStack;
bool error = false;
outRawString->clear();
outStyleString->spans.clear();
util::StringBuilder builder;
size_t depth = 1;
while (xml::XmlPullParser::isGoodEvent(parser->next())) {
const xml::XmlPullParser::Event event = parser->getEvent();
if (event == xml::XmlPullParser::Event::kEndElement) {
if (!parser->getElementNamespace().empty()) {
// We already warned and skipped the start element, so just skip here too
continue;
}
depth--;
if (depth == 0) {
break;
}
spanStack.back().lastChar = builder.str().size();
outStyleString->spans.push_back(spanStack.back());
spanStack.pop_back();
} else if (event == xml::XmlPullParser::Event::kText) {
outRawString->append(parser->getText());
builder.append(parser->getText());
} else if (event == xml::XmlPullParser::Event::kStartElement) {
if (!parser->getElementNamespace().empty()) {
if (parser->getElementNamespace() != sXliffNamespaceUri) {
// Only warn if this isn't an xliff namespace.
mDiag->warn(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "skipping element '"
<< parser->getElementName()
<< "' with unknown namespace '"
<< parser->getElementNamespace()
<< "'");
}
continue;
}
depth++;
// Build a span object out of the nested element.
std::u16string spanName = parser->getElementName();
const auto endAttrIter = parser->endAttributes();
for (auto attrIter = parser->beginAttributes(); attrIter != endAttrIter; ++attrIter) {
spanName += u";";
spanName += attrIter->name;
spanName += u"=";
spanName += attrIter->value;
}
if (builder.str().size() > std::numeric_limits<uint32_t>::max()) {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "style string '" << builder.str() << "' is too long");
error = true;
} else {
spanStack.push_back(Span{ spanName, static_cast<uint32_t>(builder.str().size()) });
}
} else if (event == xml::XmlPullParser::Event::kComment) {
// Skip
} else {
assert(false);
}
}
assert(spanStack.empty() && "spans haven't been fully processed");
outStyleString->str = builder.str();
return !error;
}
bool ResourceParser::parse(xml::XmlPullParser* parser) {
bool error = false;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
if (parser->getEvent() != xml::XmlPullParser::Event::kStartElement) {
// Skip comments and text.
continue;
}
if (!parser->getElementNamespace().empty() || parser->getElementName() != u"resources") {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "root element must be <resources>");
return false;
}
error |= !parseResources(parser);
break;
};
if (parser->getEvent() == xml::XmlPullParser::Event::kBadDocument) {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "xml parser error: " << parser->getLastError());
return false;
}
return !error;
}
static bool shouldStripResource(const xml::XmlPullParser* parser,
const Maybe<std::u16string> productToMatch) {
assert(parser->getEvent() == xml::XmlPullParser::Event::kStartElement);
if (Maybe<StringPiece16> maybeProduct = xml::findNonEmptyAttribute(parser, u"product")) {
if (!productToMatch) {
if (maybeProduct.value() != u"default" && maybeProduct.value() != u"phone") {
// We didn't specify a product and this is not a default product, so skip.
return true;
}
} else {
if (productToMatch && maybeProduct.value() != productToMatch.value()) {
// We specified a product, but they don't match.
return true;
}
}
}
return false;
}
/**
* A parsed resource ready to be added to the ResourceTable.
*/
struct ParsedResource {
ResourceName name;
Source source;
ResourceId id;
SymbolState symbolState = SymbolState::kUndefined;
std::u16string comment;
std::unique_ptr<Value> value;
std::list<ParsedResource> childResources;
};
// Recursively adds resources to the ResourceTable.
static bool addResourcesToTable(ResourceTable* table, const ConfigDescription& config,
IDiagnostics* diag, ParsedResource* res) {
if (res->symbolState != SymbolState::kUndefined) {
Symbol symbol;
symbol.state = res->symbolState;
symbol.source = res->source;
symbol.comment = res->comment;
if (!table->setSymbolState(res->name, res->id, symbol, diag)) {
return false;
}
}
if (res->value) {
// Attach the comment, source and config to the value.
res->value->setComment(std::move(res->comment));
res->value->setSource(std::move(res->source));
if (!table->addResource(res->name, res->id, config, std::move(res->value), diag)) {
return false;
}
}
bool error = false;
for (ParsedResource& child : res->childResources) {
error |= !addResourcesToTable(table, config, diag, &child);
}
return !error;
}
bool ResourceParser::parseResources(xml::XmlPullParser* parser) {
std::set<ResourceName> strippedResources;
bool error = false;
std::u16string comment;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
const xml::XmlPullParser::Event event = parser->getEvent();
if (event == xml::XmlPullParser::Event::kComment) {
comment = parser->getComment();
continue;
}
if (event == xml::XmlPullParser::Event::kText) {
if (!util::trimWhitespace(parser->getText()).empty()) {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "plain text not allowed here");
error = true;
}
continue;
}
assert(event == xml::XmlPullParser::Event::kStartElement);
if (!parser->getElementNamespace().empty()) {
// Skip unknown namespace.
continue;
}
std::u16string elementName = parser->getElementName();
if (elementName == u"skip" || elementName == u"eat-comment") {
comment = u"";
continue;
}
if (elementName == u"item") {
// Items simply have their type encoded in the type attribute.
if (Maybe<StringPiece16> maybeType = xml::findNonEmptyAttribute(parser, u"type")) {
elementName = maybeType.value().toString();
} else {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "<item> must have a 'type' attribute");
error = true;
continue;
}
}
ParsedResource parsedResource;
parsedResource.source = mSource.withLine(parser->getLineNumber());
parsedResource.comment = std::move(comment);
if (Maybe<StringPiece16> maybeName = xml::findNonEmptyAttribute(parser, u"name")) {
parsedResource.name.entry = maybeName.value().toString();
} else if (elementName != u"public-group") {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "<" << elementName << "> tag must have a 'name' attribute");
error = true;
continue;
}
// Check if we should skip this product.
const bool stripResource = shouldStripResource(parser, mOptions.product);
bool result = true;
if (elementName == u"id") {
parsedResource.name.type = ResourceType::kId;
parsedResource.value = util::make_unique<Id>();
} else if (elementName == u"string") {
parsedResource.name.type = ResourceType::kString;
result = parseString(parser, &parsedResource);
} else if (elementName == u"color") {
parsedResource.name.type = ResourceType::kColor;
result = parseColor(parser, &parsedResource);
} else if (elementName == u"drawable") {
parsedResource.name.type = ResourceType::kDrawable;
result = parseColor(parser, &parsedResource);
} else if (elementName == u"bool") {
parsedResource.name.type = ResourceType::kBool;
result = parsePrimitive(parser, &parsedResource);
} else if (elementName == u"integer") {
parsedResource.name.type = ResourceType::kInteger;
result = parsePrimitive(parser, &parsedResource);
} else if (elementName == u"dimen") {
parsedResource.name.type = ResourceType::kDimen;
result = parsePrimitive(parser, &parsedResource);
} else if (elementName == u"fraction") {
parsedResource.name.type = ResourceType::kFraction;
result = parsePrimitive(parser, &parsedResource);
} else if (elementName == u"style") {
parsedResource.name.type = ResourceType::kStyle;
result = parseStyle(parser, &parsedResource);
} else if (elementName == u"plurals") {
parsedResource.name.type = ResourceType::kPlurals;
result = parsePlural(parser, &parsedResource);
} else if (elementName == u"array") {
parsedResource.name.type = ResourceType::kArray;
result = parseArray(parser, &parsedResource, android::ResTable_map::TYPE_ANY);
} else if (elementName == u"string-array") {
parsedResource.name.type = ResourceType::kArray;
result = parseArray(parser, &parsedResource, android::ResTable_map::TYPE_STRING);
} else if (elementName == u"integer-array") {
parsedResource.name.type = ResourceType::kArray;
result = parseArray(parser, &parsedResource, android::ResTable_map::TYPE_INTEGER);
} else if (elementName == u"declare-styleable") {
parsedResource.name.type = ResourceType::kStyleable;
result = parseDeclareStyleable(parser, &parsedResource);
} else if (elementName == u"attr") {
parsedResource.name.type = ResourceType::kAttr;
result = parseAttr(parser, &parsedResource);
} else if (elementName == u"public") {
result = parsePublic(parser, &parsedResource);
} else if (elementName == u"java-symbol" || elementName == u"symbol") {
result = parseSymbol(parser, &parsedResource);
} else if (elementName == u"public-group") {
result = parsePublicGroup(parser, &parsedResource);
} else {
// Try parsing the elementName (or type) as a resource. These shall only be
// resources like 'layout' or 'xml' and they can only be references.
if (const ResourceType* type = parseResourceType(elementName)) {
parsedResource.name.type = *type;
parsedResource.value = parseXml(parser, android::ResTable_map::TYPE_REFERENCE,
false);
if (!parsedResource.value) {
mDiag->error(DiagMessage(parsedResource.source) << "invalid value for type '"
<< *type << "'. Expected a reference");
result = false;
}
} else {
mDiag->warn(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "unknown resource type '" << elementName << "'");
}
}
if (result) {
// We successfully parsed the resource.
if (stripResource) {
// Record that we stripped out this resource name.
// We will check that at least one variant of this resource was included.
strippedResources.insert(parsedResource.name);
} else {
error |= !addResourcesToTable(mTable, mConfig, mDiag, &parsedResource);
}
} else {
error = true;
}
}
// Check that we included at least one variant of each stripped resource.
for (const ResourceName& strippedResource : strippedResources) {
if (!mTable->findResource(strippedResource)) {
// Failed to find the resource.
mDiag->error(DiagMessage(mSource) << "resource '" << strippedResource << "' "
"was filtered out but no product variant remains");
error = true;
}
}
return !error;
}
enum {
kAllowRawString = true,
kNoRawString = false
};
/**
* Reads the entire XML subtree and attempts to parse it as some Item,
* with typeMask denoting which items it can be. If allowRawValue is
* true, a RawString is returned if the XML couldn't be parsed as
* an Item. If allowRawValue is false, nullptr is returned in this
* case.
*/
std::unique_ptr<Item> ResourceParser::parseXml(xml::XmlPullParser* parser, const uint32_t typeMask,
const bool allowRawValue) {
const size_t beginXmlLine = parser->getLineNumber();
std::u16string rawValue;
StyleString styleString;
if (!flattenXmlSubtree(parser, &rawValue, &styleString)) {
return {};
}
if (!styleString.spans.empty()) {
// This can only be a StyledString.
return util::make_unique<StyledString>(
mTable->stringPool.makeRef(styleString, StringPool::Context{ 1, mConfig }));
}
auto onCreateReference = [&](const ResourceName& name) {
// name.package can be empty here, as it will assume the package name of the table.
std::unique_ptr<Id> id = util::make_unique<Id>();
id->setSource(mSource.withLine(beginXmlLine));
mTable->addResource(name, {}, std::move(id), mDiag);
};
// Process the raw value.
std::unique_ptr<Item> processedItem = ResourceUtils::parseItemForAttribute(rawValue, typeMask,
onCreateReference);
if (processedItem) {
// Fix up the reference.
if (Reference* ref = valueCast<Reference>(processedItem.get())) {
transformReferenceFromNamespace(parser, u"", ref);
}
return processedItem;
}
// Try making a regular string.
if (typeMask & android::ResTable_map::TYPE_STRING) {
// Use the trimmed, escaped string.
return util::make_unique<String>(
mTable->stringPool.makeRef(styleString.str, StringPool::Context{ 1, mConfig }));
}
if (allowRawValue) {
// We can't parse this so return a RawString if we are allowed.
return util::make_unique<RawString>(
mTable->stringPool.makeRef(rawValue, StringPool::Context{ 1, mConfig }));
}
return {};
}
bool ResourceParser::parseString(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
bool formatted = true;
if (Maybe<StringPiece16> formattedAttr = xml::findAttribute(parser, u"formatted")) {
if (!ResourceUtils::tryParseBool(formattedAttr.value(), &formatted)) {
mDiag->error(DiagMessage(source) << "invalid value for 'formatted'. Must be a boolean");
return false;
}
}
bool translateable = mOptions.translatable;
if (Maybe<StringPiece16> translateableAttr = xml::findAttribute(parser, u"translatable")) {
if (!ResourceUtils::tryParseBool(translateableAttr.value(), &translateable)) {
mDiag->error(DiagMessage(source)
<< "invalid value for 'translatable'. Must be a boolean");
return false;
}
}
outResource->value = parseXml(parser, android::ResTable_map::TYPE_STRING, kNoRawString);
if (!outResource->value) {
mDiag->error(DiagMessage(source) << "not a valid string");
return false;
}
if (formatted && translateable) {
if (String* stringValue = valueCast<String>(outResource->value.get())) {
if (!util::verifyJavaStringFormat(*stringValue->value)) {
mDiag->error(DiagMessage(source)
<< "multiple substitutions specified in non-positional format; "
"did you mean to add the formatted=\"false\" attribute?");
return false;
}
}
}
return true;
}
bool ResourceParser::parseColor(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
outResource->value = parseXml(parser, android::ResTable_map::TYPE_COLOR, kNoRawString);
if (!outResource->value) {
mDiag->error(DiagMessage(source) << "invalid color");
return false;
}
return true;
}
bool ResourceParser::parsePrimitive(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
uint32_t typeMask = 0;
switch (outResource->name.type) {
case ResourceType::kInteger:
typeMask |= android::ResTable_map::TYPE_INTEGER;
break;
case ResourceType::kFraction:
// fallthrough
case ResourceType::kDimen:
typeMask |= android::ResTable_map::TYPE_DIMENSION
| android::ResTable_map::TYPE_FLOAT
| android::ResTable_map::TYPE_FRACTION;
break;
case ResourceType::kBool:
typeMask |= android::ResTable_map::TYPE_BOOLEAN;
break;
default:
assert(false);
break;
}
outResource->value = parseXml(parser, typeMask, kNoRawString);
if (!outResource->value) {
mDiag->error(DiagMessage(source) << "invalid " << outResource->name.type);
return false;
}
return true;
}
bool ResourceParser::parsePublic(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
Maybe<StringPiece16> maybeType = xml::findNonEmptyAttribute(parser, u"type");
if (!maybeType) {
mDiag->error(DiagMessage(source) << "<public> must have a 'type' attribute");
return false;
}
const ResourceType* parsedType = parseResourceType(maybeType.value());
if (!parsedType) {
mDiag->error(DiagMessage(source) << "invalid resource type '" << maybeType.value()
<< "' in <public>");
return false;
}
outResource->name.type = *parsedType;
if (Maybe<StringPiece16> maybeId = xml::findNonEmptyAttribute(parser, u"id")) {
android::Res_value val;
bool result = android::ResTable::stringToInt(maybeId.value().data(),
maybeId.value().size(), &val);
ResourceId resourceId(val.data);
if (!result || !resourceId.isValid()) {
mDiag->error(DiagMessage(source) << "invalid resource ID '" << maybeId.value()
<< "' in <public>");
return false;
}
outResource->id = resourceId;
}
if (*parsedType == ResourceType::kId) {
// An ID marked as public is also the definition of an ID.
outResource->value = util::make_unique<Id>();
}
outResource->symbolState = SymbolState::kPublic;
return true;
}
bool ResourceParser::parsePublicGroup(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
Maybe<StringPiece16> maybeType = xml::findNonEmptyAttribute(parser, u"type");
if (!maybeType) {
mDiag->error(DiagMessage(source) << "<public-group> must have a 'type' attribute");
return false;
}
const ResourceType* parsedType = parseResourceType(maybeType.value());
if (!parsedType) {
mDiag->error(DiagMessage(source) << "invalid resource type '" << maybeType.value()
<< "' in <public-group>");
return false;
}
Maybe<StringPiece16> maybeId = xml::findNonEmptyAttribute(parser, u"first-id");
if (!maybeId) {
mDiag->error(DiagMessage(source) << "<public-group> must have a 'first-id' attribute");
return false;
}
android::Res_value val;
bool result = android::ResTable::stringToInt(maybeId.value().data(),
maybeId.value().size(), &val);
ResourceId nextId(val.data);
if (!result || !nextId.isValid()) {
mDiag->error(DiagMessage(source) << "invalid resource ID '" << maybeId.value()
<< "' in <public-group>");
return false;
}
std::u16string comment;
bool error = false;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
if (parser->getEvent() == xml::XmlPullParser::Event::kComment) {
comment = util::trimWhitespace(parser->getComment()).toString();
continue;
} else if (parser->getEvent() != xml::XmlPullParser::Event::kStartElement) {
// Skip text.
continue;
}
const Source itemSource = mSource.withLine(parser->getLineNumber());
const std::u16string& elementNamespace = parser->getElementNamespace();
const std::u16string& elementName = parser->getElementName();
if (elementNamespace.empty() && elementName == u"public") {
Maybe<StringPiece16> maybeName = xml::findNonEmptyAttribute(parser, u"name");
if (!maybeName) {
mDiag->error(DiagMessage(itemSource) << "<public> must have a 'name' attribute");
error = true;
continue;
}
if (xml::findNonEmptyAttribute(parser, u"id")) {
mDiag->error(DiagMessage(itemSource) << "'id' is ignored within <public-group>");
error = true;
continue;
}
if (xml::findNonEmptyAttribute(parser, u"type")) {
mDiag->error(DiagMessage(itemSource) << "'type' is ignored within <public-group>");
error = true;
continue;
}
ParsedResource childResource;
childResource.name.type = *parsedType;
childResource.name.entry = maybeName.value().toString();
childResource.id = nextId;
childResource.comment = std::move(comment);
childResource.source = itemSource;
childResource.symbolState = SymbolState::kPublic;
outResource->childResources.push_back(std::move(childResource));
nextId.id += 1;
} else if (!shouldIgnoreElement(elementNamespace, elementName)) {
mDiag->error(DiagMessage(itemSource) << ":" << elementName << ">");
error = true;
}
}
return !error;
}
bool ResourceParser::parseSymbol(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
Maybe<StringPiece16> maybeType = xml::findNonEmptyAttribute(parser, u"type");
if (!maybeType) {
mDiag->error(DiagMessage(source) << "<" << parser->getElementName() << "> must have a "
"'type' attribute");
return false;
}
const ResourceType* parsedType = parseResourceType(maybeType.value());
if (!parsedType) {
mDiag->error(DiagMessage(source) << "invalid resource type '" << maybeType.value()
<< "' in <" << parser->getElementName() << ">");
return false;
}
outResource->name.type = *parsedType;
outResource->symbolState = SymbolState::kPrivate;
return true;
}
static uint32_t parseFormatType(const StringPiece16& piece) {
if (piece == u"reference") return android::ResTable_map::TYPE_REFERENCE;
else if (piece == u"string") return android::ResTable_map::TYPE_STRING;
else if (piece == u"integer") return android::ResTable_map::TYPE_INTEGER;
else if (piece == u"boolean") return android::ResTable_map::TYPE_BOOLEAN;
else if (piece == u"color") return android::ResTable_map::TYPE_COLOR;
else if (piece == u"float") return android::ResTable_map::TYPE_FLOAT;
else if (piece == u"dimension") return android::ResTable_map::TYPE_DIMENSION;
else if (piece == u"fraction") return android::ResTable_map::TYPE_FRACTION;
else if (piece == u"enum") return android::ResTable_map::TYPE_ENUM;
else if (piece == u"flags") return android::ResTable_map::TYPE_FLAGS;
return 0;
}
static uint32_t parseFormatAttribute(const StringPiece16& str) {
uint32_t mask = 0;
for (StringPiece16 part : util::tokenize(str, u'|')) {
StringPiece16 trimmedPart = util::trimWhitespace(part);
uint32_t type = parseFormatType(trimmedPart);
if (type == 0) {
return 0;
}
mask |= type;
}
return mask;
}
bool ResourceParser::parseAttr(xml::XmlPullParser* parser, ParsedResource* outResource) {
outResource->source = mSource.withLine(parser->getLineNumber());
return parseAttrImpl(parser, outResource, false);
}
bool ResourceParser::parseAttrImpl(xml::XmlPullParser* parser, ParsedResource* outResource,
bool weak) {
uint32_t typeMask = 0;
Maybe<StringPiece16> maybeFormat = xml::findAttribute(parser, u"format");
if (maybeFormat) {
typeMask = parseFormatAttribute(maybeFormat.value());
if (typeMask == 0) {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "invalid attribute format '" << maybeFormat.value() << "'");
return false;
}
}
struct SymbolComparator {
bool operator()(const Attribute::Symbol& a, const Attribute::Symbol& b) {
return a.symbol.name.value() < b.symbol.name.value();
}
};
std::set<Attribute::Symbol, SymbolComparator> items;
std::u16string comment;
bool error = false;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
if (parser->getEvent() == xml::XmlPullParser::Event::kComment) {
comment = util::trimWhitespace(parser->getComment()).toString();
continue;
} else if (parser->getEvent() != xml::XmlPullParser::Event::kStartElement) {
// Skip text.
continue;
}
const Source itemSource = mSource.withLine(parser->getLineNumber());
const std::u16string& elementNamespace = parser->getElementNamespace();
const std::u16string& elementName = parser->getElementName();
if (elementNamespace.empty() && (elementName == u"flag" || elementName == u"enum")) {
if (elementName == u"enum") {
if (typeMask & android::ResTable_map::TYPE_FLAGS) {
mDiag->error(DiagMessage(itemSource)
<< "can not define an <enum>; already defined a <flag>");
error = true;
continue;
}
typeMask |= android::ResTable_map::TYPE_ENUM;
} else if (elementName == u"flag") {
if (typeMask & android::ResTable_map::TYPE_ENUM) {
mDiag->error(DiagMessage(itemSource)
<< "can not define a <flag>; already defined an <enum>");
error = true;
continue;
}
typeMask |= android::ResTable_map::TYPE_FLAGS;
}
if (Maybe<Attribute::Symbol> s = parseEnumOrFlagItem(parser, elementName)) {
Attribute::Symbol& symbol = s.value();
ParsedResource childResource;
childResource.name = symbol.symbol.name.value();
childResource.source = itemSource;
childResource.value = util::make_unique<Id>();
outResource->childResources.push_back(std::move(childResource));
symbol.symbol.setComment(std::move(comment));
symbol.symbol.setSource(itemSource);
auto insertResult = items.insert(std::move(symbol));
if (!insertResult.second) {
const Attribute::Symbol& existingSymbol = *insertResult.first;
mDiag->error(DiagMessage(itemSource)
<< "duplicate symbol '" << existingSymbol.symbol.name.value().entry
<< "'");
mDiag->note(DiagMessage(existingSymbol.symbol.getSource())
<< "first defined here");
error = true;
}
} else {
error = true;
}
} else if (!shouldIgnoreElement(elementNamespace, elementName)) {
mDiag->error(DiagMessage(itemSource) << ":" << elementName << ">");
error = true;
}
comment = {};
}
if (error) {
return false;
}
std::unique_ptr<Attribute> attr = util::make_unique<Attribute>(weak);
attr->symbols = std::vector<Attribute::Symbol>(items.begin(), items.end());
attr->typeMask = typeMask ? typeMask : uint32_t(android::ResTable_map::TYPE_ANY);
outResource->value = std::move(attr);
return true;
}
Maybe<Attribute::Symbol> ResourceParser::parseEnumOrFlagItem(xml::XmlPullParser* parser,
const StringPiece16& tag) {
const Source source = mSource.withLine(parser->getLineNumber());
Maybe<StringPiece16> maybeName = xml::findNonEmptyAttribute(parser, u"name");
if (!maybeName) {
mDiag->error(DiagMessage(source) << "no attribute 'name' found for tag <" << tag << ">");
return {};
}
Maybe<StringPiece16> maybeValue = xml::findNonEmptyAttribute(parser, u"value");
if (!maybeValue) {
mDiag->error(DiagMessage(source) << "no attribute 'value' found for tag <" << tag << ">");
return {};
}
android::Res_value val;
if (!android::ResTable::stringToInt(maybeValue.value().data(),
maybeValue.value().size(), &val)) {
mDiag->error(DiagMessage(source) << "invalid value '" << maybeValue.value()
<< "' for <" << tag << ">; must be an integer");
return {};
}
return Attribute::Symbol{
Reference(ResourceName({}, ResourceType::kId, maybeName.value().toString())),
val.data };
}
static Maybe<Reference> parseXmlAttributeName(StringPiece16 str) {
str = util::trimWhitespace(str);
const char16_t* start = str.data();
const char16_t* const end = start + str.size();
const char16_t* p = start;
Reference ref;
if (p != end && *p == u'*') {
ref.privateReference = true;
start++;
p++;
}
StringPiece16 package;
StringPiece16 name;
while (p != end) {
if (*p == u':') {
package = StringPiece16(start, p - start);
name = StringPiece16(p + 1, end - (p + 1));
break;
}
p++;
}
ref.name = ResourceName(package.toString(), ResourceType::kAttr,
name.empty() ? str.toString() : name.toString());
return Maybe<Reference>(std::move(ref));
}
bool ResourceParser::parseStyleItem(xml::XmlPullParser* parser, Style* style) {
const Source source = mSource.withLine(parser->getLineNumber());
Maybe<StringPiece16> maybeName = xml::findNonEmptyAttribute(parser, u"name");
if (!maybeName) {
mDiag->error(DiagMessage(source) << "<item> must have a 'name' attribute");
return false;
}
Maybe<Reference> maybeKey = parseXmlAttributeName(maybeName.value());
if (!maybeKey) {
mDiag->error(DiagMessage(source) << "invalid attribute name '" << maybeName.value() << "'");
return false;
}
transformReferenceFromNamespace(parser, u"", &maybeKey.value());
std::unique_ptr<Item> value = parseXml(parser, 0, kAllowRawString);
if (!value) {
mDiag->error(DiagMessage(source) << "could not parse style item");
return false;
}
style->entries.push_back(Style::Entry{ std::move(maybeKey.value()), std::move(value) });
return true;
}
bool ResourceParser::parseStyle(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
std::unique_ptr<Style> style = util::make_unique<Style>();
Maybe<StringPiece16> maybeParent = xml::findAttribute(parser, u"parent");
if (maybeParent) {
// If the parent is empty, we don't have a parent, but we also don't infer either.
if (!maybeParent.value().empty()) {
std::string errStr;
style->parent = ResourceUtils::parseStyleParentReference(maybeParent.value(), &errStr);
if (!style->parent) {
mDiag->error(DiagMessage(source) << errStr);
return false;
}
// Transform the namespace prefix to the actual package name, and mark the reference as
// private if appropriate.
transformReferenceFromNamespace(parser, u"", &style->parent.value());
}
} else {
// No parent was specified, so try inferring it from the style name.
std::u16string styleName = outResource->name.entry;
size_t pos = styleName.find_last_of(u'.');
if (pos != std::string::npos) {
style->parentInferred = true;
style->parent = Reference(ResourceName({}, ResourceType::kStyle,
styleName.substr(0, pos)));
}
}
bool error = false;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
if (parser->getEvent() != xml::XmlPullParser::Event::kStartElement) {
// Skip text and comments.
continue;
}
const std::u16string& elementNamespace = parser->getElementNamespace();
const std::u16string& elementName = parser->getElementName();
if (elementNamespace == u"" && elementName == u"item") {
error |= !parseStyleItem(parser, style.get());
} else if (!shouldIgnoreElement(elementNamespace, elementName)) {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< ":" << elementName << ">");
error = true;
}
}
if (error) {
return false;
}
outResource->value = std::move(style);
return true;
}
bool ResourceParser::parseArray(xml::XmlPullParser* parser, ParsedResource* outResource,
uint32_t typeMask) {
const Source source = mSource.withLine(parser->getLineNumber());
std::unique_ptr<Array> array = util::make_unique<Array>();
bool error = false;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
if (parser->getEvent() != xml::XmlPullParser::Event::kStartElement) {
// Skip text and comments.
continue;
}
const Source itemSource = mSource.withLine(parser->getLineNumber());
const std::u16string& elementNamespace = parser->getElementNamespace();
const std::u16string& elementName = parser->getElementName();
if (elementNamespace.empty() && elementName == u"item") {
std::unique_ptr<Item> item = parseXml(parser, typeMask, kNoRawString);
if (!item) {
mDiag->error(DiagMessage(itemSource) << "could not parse array item");
error = true;
continue;
}
item->setSource(itemSource);
array->items.emplace_back(std::move(item));
} else if (!shouldIgnoreElement(elementNamespace, elementName)) {
mDiag->error(DiagMessage(mSource.withLine(parser->getLineNumber()))
<< "unknown tag <" << elementNamespace << ":" << elementName << ">");
error = true;
}
}
if (error) {
return false;
}
outResource->value = std::move(array);
return true;
}
bool ResourceParser::parsePlural(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
std::unique_ptr<Plural> plural = util::make_unique<Plural>();
bool error = false;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
if (parser->getEvent() != xml::XmlPullParser::Event::kStartElement) {
// Skip text and comments.
continue;
}
const Source itemSource = mSource.withLine(parser->getLineNumber());
const std::u16string& elementNamespace = parser->getElementNamespace();
const std::u16string& elementName = parser->getElementName();
if (elementNamespace.empty() && elementName == u"item") {
Maybe<StringPiece16> maybeQuantity = xml::findNonEmptyAttribute(parser, u"quantity");
if (!maybeQuantity) {
mDiag->error(DiagMessage(itemSource) << "<item> in <plurals> requires attribute "
<< "'quantity'");
error = true;
continue;
}
StringPiece16 trimmedQuantity = util::trimWhitespace(maybeQuantity.value());
size_t index = 0;
if (trimmedQuantity == u"zero") {
index = Plural::Zero;
} else if (trimmedQuantity == u"one") {
index = Plural::One;
} else if (trimmedQuantity == u"two") {
index = Plural::Two;
} else if (trimmedQuantity == u"few") {
index = Plural::Few;
} else if (trimmedQuantity == u"many") {
index = Plural::Many;
} else if (trimmedQuantity == u"other") {
index = Plural::Other;
} else {
mDiag->error(DiagMessage(itemSource)
<< "<item> in <plural> has invalid value '" << trimmedQuantity
<< "' for attribute 'quantity'");
error = true;
continue;
}
if (plural->values[index]) {
mDiag->error(DiagMessage(itemSource)
<< "duplicate quantity '" << trimmedQuantity << "'");
error = true;
continue;
}
if (!(plural->values[index] = parseXml(parser, android::ResTable_map::TYPE_STRING,
kNoRawString))) {
error = true;
}
plural->values[index]->setSource(itemSource);
} else if (!shouldIgnoreElement(elementNamespace, elementName)) {
mDiag->error(DiagMessage(itemSource) << "unknown tag <" << elementNamespace << ":"
<< elementName << ">");
error = true;
}
}
if (error) {
return false;
}
outResource->value = std::move(plural);
return true;
}
bool ResourceParser::parseDeclareStyleable(xml::XmlPullParser* parser, ParsedResource* outResource) {
const Source source = mSource.withLine(parser->getLineNumber());
std::unique_ptr<Styleable> styleable = util::make_unique<Styleable>();
// Declare-styleable is kPrivate by default, because it technically only exists in R.java.
outResource->symbolState = SymbolState::kPublic;
std::u16string comment;
bool error = false;
const size_t depth = parser->getDepth();
while (xml::XmlPullParser::nextChildNode(parser, depth)) {
if (parser->getEvent() == xml::XmlPullParser::Event::kComment) {
comment = util::trimWhitespace(parser->getComment()).toString();
continue;
} else if (parser->getEvent() != xml::XmlPullParser::Event::kStartElement) {
// Ignore text.
continue;
}
const Source itemSource = mSource.withLine(parser->getLineNumber());
const std::u16string& elementNamespace = parser->getElementNamespace();
const std::u16string& elementName = parser->getElementName();
if (elementNamespace.empty() && elementName == u"attr") {
Maybe<StringPiece16> maybeName = xml::findNonEmptyAttribute(parser, u"name");
if (!maybeName) {
mDiag->error(DiagMessage(itemSource) << "<attr> tag must have a 'name' attribute");
error = true;
continue;
}
// If this is a declaration, the package name may be in the name. Separate these out.
// Eg. <attr name="android:text" />
Maybe<Reference> maybeRef = parseXmlAttributeName(maybeName.value());
if (!maybeRef) {
mDiag->error(DiagMessage(itemSource) << "<attr> tag has invalid name '"
<< maybeName.value() << "'");
error = true;
continue;
}
Reference& childRef = maybeRef.value();
xml::transformReferenceFromNamespace(parser, u"", &childRef);
// Create the ParsedResource that will add the attribute to the table.
ParsedResource childResource;
childResource.name = childRef.name.value();
childResource.source = itemSource;
childResource.comment = std::move(comment);
if (!parseAttrImpl(parser, &childResource, true)) {
error = true;
continue;
}
// Create the reference to this attribute.
childRef.setComment(childResource.comment);
childRef.setSource(itemSource);
styleable->entries.push_back(std::move(childRef));
outResource->childResources.push_back(std::move(childResource));
} else if (!shouldIgnoreElement(elementNamespace, elementName)) {
mDiag->error(DiagMessage(itemSource) << "unknown tag <" << elementNamespace << ":"
<< elementName << ">");
error = true;
}
comment = {};
}
if (error) {
return false;
}
outResource->value = std::move(styleable);
return true;
}
} // namespace aapt
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