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Diffstat (limited to 'libs/androidfw/AttributeResolution.cpp')
-rw-r--r--libs/androidfw/AttributeResolution.cpp450
1 files changed, 196 insertions, 254 deletions
diff --git a/libs/androidfw/AttributeResolution.cpp b/libs/androidfw/AttributeResolution.cpp
index e62fb614e195..c188712e5877 100644
--- a/libs/androidfw/AttributeResolution.cpp
+++ b/libs/androidfw/AttributeResolution.cpp
@@ -24,9 +24,12 @@
#include "androidfw/AttributeFinder.h"
constexpr bool kDebugStyles = false;
+#define DEBUG_LOG(...) do { if (kDebugStyles) { ALOGI(__VA_ARGS__); } } while(0)
namespace android {
+namespace {
+
// Java asset cookies have 0 as an invalid cookie, but TypedArray expects < 0.
static uint32_t ApkAssetsCookieToJavaCookie(ApkAssetsCookie cookie) {
return cookie != kInvalidCookie ? static_cast<uint32_t>(cookie + 1) : static_cast<uint32_t>(-1);
@@ -36,8 +39,7 @@ class XmlAttributeFinder
: public BackTrackingAttributeFinder<XmlAttributeFinder, size_t> {
public:
explicit XmlAttributeFinder(const ResXMLParser* parser)
- : BackTrackingAttributeFinder(
- 0, parser != nullptr ? parser->getAttributeCount() : 0),
+ : BackTrackingAttributeFinder(0, parser != nullptr ? parser->getAttributeCount() : 0),
parser_(parser) {}
inline uint32_t GetAttribute(size_t index) const {
@@ -61,136 +63,149 @@ class BagAttributeFinder
}
};
-bool ResolveAttrs(Theme* theme, uint32_t def_style_attr, uint32_t def_style_res,
- uint32_t* src_values, size_t src_values_length, uint32_t* attrs,
- size_t attrs_length, uint32_t* out_values, uint32_t* out_indices) {
- if (kDebugStyles) {
- ALOGI("APPLY STYLE: theme=0x%p defStyleAttr=0x%x defStyleRes=0x%x", theme,
- def_style_attr, def_style_res);
+base::expected<const ResolvedBag*, NullOrIOError> GetStyleBag(Theme* theme,
+ uint32_t theme_attribute_resid,
+ uint32_t fallback_resid,
+ uint32_t* out_theme_flags) {
+ // Load the style from the attribute if specified.
+ if (theme_attribute_resid != 0U) {
+ std::optional<AssetManager2::SelectedValue> value = theme->GetAttribute(theme_attribute_resid);
+ if (value.has_value()) {
+ *out_theme_flags |= value->flags;
+ auto result = theme->GetAssetManager()->ResolveBag(*value);
+ if (result.has_value() || IsIOError(result)) {
+ return result;
+ }
+ }
}
- AssetManager2* assetmanager = theme->GetAssetManager();
- ResTable_config config;
- Res_value value;
+ // Fallback to loading the style from the resource id if specified.
+ if (fallback_resid != 0U) {
+ return theme->GetAssetManager()->GetBag(fallback_resid);
+ }
- int indices_idx = 0;
+ return base::unexpected(std::nullopt);
+}
- // Load default style from attribute, if specified...
- uint32_t def_style_flags = 0u;
- if (def_style_attr != 0) {
- Res_value value;
- if (theme->GetAttribute(def_style_attr, &value, &def_style_flags) != kInvalidCookie) {
- if (value.dataType == Res_value::TYPE_REFERENCE) {
- def_style_res = value.data;
- }
- }
+base::expected<const ResolvedBag*, NullOrIOError> GetXmlStyleBag(Theme* theme,
+ ResXMLParser* xml_parser,
+ uint32_t* out_theme_flags) {
+ if (xml_parser == nullptr) {
+ return base::unexpected(std::nullopt);
}
- // Retrieve the default style bag, if requested.
- const ResolvedBag* default_style_bag = nullptr;
- if (def_style_res != 0) {
- default_style_bag = assetmanager->GetBag(def_style_res);
- if (default_style_bag != nullptr) {
- def_style_flags |= default_style_bag->type_spec_flags;
+ // Retrieve the style resource ID associated with the current XML tag's style attribute.
+ Res_value value;
+ const ssize_t idx = xml_parser->indexOfStyle();
+ if (idx < 0 || xml_parser->getAttributeValue(idx, &value) < 0) {
+ return base::unexpected(std::nullopt);
+ }
+
+ if (value.dataType == Res_value::TYPE_ATTRIBUTE) {
+ // Resolve the attribute with out theme.
+ if (std::optional<AssetManager2::SelectedValue> result = theme->GetAttribute(value.data)) {
+ *out_theme_flags |= result->flags;
+ return theme->GetAssetManager()->ResolveBag(*result);
}
}
- BagAttributeFinder def_style_attr_finder(default_style_bag);
+ if (value.dataType == Res_value::TYPE_REFERENCE) {
+ return theme->GetAssetManager()->GetBag(value.data);
+ }
+
+ return base::unexpected(std::nullopt);
+}
+
+} // namespace
+
+base::expected<std::monostate, IOError> ResolveAttrs(Theme* theme, uint32_t def_style_attr,
+ uint32_t def_style_res, uint32_t* src_values,
+ size_t src_values_length, uint32_t* attrs,
+ size_t attrs_length, uint32_t* out_values,
+ uint32_t* out_indices) {
+ DEBUG_LOG("APPLY STYLE: theme=0x%p defStyleAttr=0x%x defStyleRes=0x%x", theme, def_style_attr,
+ def_style_res);
+
+ int indices_idx = 0;
+ const AssetManager2* assetmanager = theme->GetAssetManager();
+
+ // Load default style from attribute or resource id, if specified...
+ uint32_t def_style_theme_flags = 0U;
+ const auto default_style_bag = GetStyleBag(theme, def_style_attr, def_style_res,
+ &def_style_theme_flags);
+ if (UNLIKELY(IsIOError(default_style_bag))) {
+ return base::unexpected(GetIOError(default_style_bag.error()));
+ }
+
+ BagAttributeFinder def_style_attr_finder(default_style_bag.value_or(nullptr));
// Now iterate through all of the attributes that the client has requested,
// filling in each with whatever data we can find.
for (size_t ii = 0; ii < attrs_length; ii++) {
const uint32_t cur_ident = attrs[ii];
-
- if (kDebugStyles) {
- ALOGI("RETRIEVING ATTR 0x%08x...", cur_ident);
- }
-
- ApkAssetsCookie cookie = kInvalidCookie;
- uint32_t type_set_flags = 0;
-
- value.dataType = Res_value::TYPE_NULL;
- value.data = Res_value::DATA_NULL_UNDEFINED;
- config.density = 0;
+ DEBUG_LOG("RETRIEVING ATTR 0x%08x...", cur_ident);
// Try to find a value for this attribute... we prioritize values
// coming from, first XML attributes, then XML style, then default
// style, and finally the theme.
// Retrieve the current input value if available.
+ AssetManager2::SelectedValue value{};
if (src_values_length > 0 && src_values[ii] != 0) {
- value.dataType = Res_value::TYPE_ATTRIBUTE;
+ value.type = Res_value::TYPE_ATTRIBUTE;
value.data = src_values[ii];
- if (kDebugStyles) {
- ALOGI("-> From values: type=0x%x, data=0x%08x", value.dataType, value.data);
- }
+ DEBUG_LOG("-> From values: type=0x%x, data=0x%08x", value.type, value.data);
} else {
const ResolvedBag::Entry* const entry = def_style_attr_finder.Find(cur_ident);
if (entry != def_style_attr_finder.end()) {
- cookie = entry->cookie;
- type_set_flags = def_style_flags;
- value = entry->value;
- if (kDebugStyles) {
- ALOGI("-> From def style: type=0x%x, data=0x%08x", value.dataType, value.data);
- }
+ value = AssetManager2::SelectedValue(*default_style_bag, *entry);
+ value.flags |= def_style_theme_flags;
+ DEBUG_LOG("-> From def style: type=0x%x, data=0x%08x", value.type, value.data);
}
}
- uint32_t resid = 0;
- if (value.dataType != Res_value::TYPE_NULL) {
+ if (value.type != Res_value::TYPE_NULL) {
// Take care of resolving the found resource to its final value.
- ApkAssetsCookie new_cookie =
- theme->ResolveAttributeReference(cookie, &value, &config, &type_set_flags, &resid);
- if (new_cookie != kInvalidCookie) {
- cookie = new_cookie;
- }
- if (kDebugStyles) {
- ALOGI("-> Resolved attr: type=0x%x, data=0x%08x", value.dataType, value.data);
+ const auto result = theme->ResolveAttributeReference(value);
+ if (UNLIKELY(IsIOError(result))) {
+ return base::unexpected(GetIOError(result.error()));
}
+ DEBUG_LOG("-> Resolved attr: type=0x%x, data=0x%08x", value.type, value.data);
} else if (value.data != Res_value::DATA_NULL_EMPTY) {
// If we still don't have a value for this attribute, try to find it in the theme!
- ApkAssetsCookie new_cookie = theme->GetAttribute(cur_ident, &value, &type_set_flags);
- if (new_cookie != kInvalidCookie) {
- if (kDebugStyles) {
- ALOGI("-> From theme: type=0x%x, data=0x%08x", value.dataType, value.data);
- }
- new_cookie =
- assetmanager->ResolveReference(new_cookie, &value, &config, &type_set_flags, &resid);
- if (new_cookie != kInvalidCookie) {
- cookie = new_cookie;
- }
- if (kDebugStyles) {
- ALOGI("-> Resolved theme: type=0x%x, data=0x%08x", value.dataType, value.data);
+ if (auto attr_value = theme->GetAttribute(cur_ident)) {
+ value = *attr_value;
+ DEBUG_LOG("-> From theme: type=0x%x, data=0x%08x", value.type, value.data);
+
+ const auto result = assetmanager->ResolveReference(value, true /* cache_value */);
+ if (UNLIKELY(IsIOError(result))) {
+ return base::unexpected(GetIOError(result.error()));
}
+ DEBUG_LOG("-> Resolved theme: type=0x%x, data=0x%08x", value.type, value.data);
}
}
// Deal with the special @null value -- it turns back to TYPE_NULL.
- if (value.dataType == Res_value::TYPE_REFERENCE && value.data == 0) {
- if (kDebugStyles) {
- ALOGI("-> Setting to @null!");
- }
- value.dataType = Res_value::TYPE_NULL;
+ if (value.type == Res_value::TYPE_REFERENCE && value.data == 0) {
+ DEBUG_LOG("-> Setting to @null!");
+ value.type = Res_value::TYPE_NULL;
value.data = Res_value::DATA_NULL_UNDEFINED;
- cookie = kInvalidCookie;
+ value.cookie = kInvalidCookie;
}
- if (kDebugStyles) {
- ALOGI("Attribute 0x%08x: type=0x%x, data=0x%08x", cur_ident, value.dataType, value.data);
- }
+ DEBUG_LOG("Attribute 0x%08x: type=0x%x, data=0x%08x", cur_ident, value.type, value.data);
// Write the final value back to Java.
- out_values[STYLE_TYPE] = value.dataType;
+ out_values[STYLE_TYPE] = value.type;
out_values[STYLE_DATA] = value.data;
- out_values[STYLE_ASSET_COOKIE] = ApkAssetsCookieToJavaCookie(cookie);
- out_values[STYLE_RESOURCE_ID] = resid;
- out_values[STYLE_CHANGING_CONFIGURATIONS] = type_set_flags;
- out_values[STYLE_DENSITY] = config.density;
+ out_values[STYLE_ASSET_COOKIE] = ApkAssetsCookieToJavaCookie(value.cookie);
+ out_values[STYLE_RESOURCE_ID] = value.resid;
+ out_values[STYLE_CHANGING_CONFIGURATIONS] = value.flags;
+ out_values[STYLE_DENSITY] = value.config.density;
if (out_indices != nullptr &&
- (value.dataType != Res_value::TYPE_NULL || value.data == Res_value::DATA_NULL_EMPTY)) {
- indices_idx++;
- out_indices[indices_idx] = ii;
+ (value.type != Res_value::TYPE_NULL || value.data == Res_value::DATA_NULL_EMPTY)) {
+ out_indices[++indices_idx] = ii;
}
out_values += STYLE_NUM_ENTRIES;
@@ -199,93 +214,46 @@ bool ResolveAttrs(Theme* theme, uint32_t def_style_attr, uint32_t def_style_res,
if (out_indices != nullptr) {
out_indices[0] = indices_idx;
}
- return true;
+ return {};
}
-void ApplyStyle(Theme* theme, ResXMLParser* xml_parser, uint32_t def_style_attr,
- uint32_t def_style_resid, const uint32_t* attrs, size_t attrs_length,
- uint32_t* out_values, uint32_t* out_indices) {
- if (kDebugStyles) {
- ALOGI("APPLY STYLE: theme=0x%p defStyleAttr=0x%x defStyleRes=0x%x xml=0x%p", theme,
- def_style_attr, def_style_resid, xml_parser);
- }
-
- AssetManager2* assetmanager = theme->GetAssetManager();
- ResTable_config config;
- Res_value value;
+base::expected<std::monostate, IOError> ApplyStyle(Theme* theme, ResXMLParser* xml_parser,
+ uint32_t def_style_attr,
+ uint32_t def_style_resid,
+ const uint32_t* attrs, size_t attrs_length,
+ uint32_t* out_values, uint32_t* out_indices) {
+ DEBUG_LOG("APPLY STYLE: theme=0x%p defStyleAttr=0x%x defStyleRes=0x%x xml=0x%p", theme,
+ def_style_attr, def_style_resid, xml_parser);
int indices_idx = 0;
+ const AssetManager2* assetmanager = theme->GetAssetManager();
// Load default style from attribute, if specified...
- uint32_t def_style_flags = 0u;
- if (def_style_attr != 0) {
- Res_value value;
- if (theme->GetAttribute(def_style_attr, &value, &def_style_flags) != kInvalidCookie) {
- if (value.dataType == Res_value::TYPE_REFERENCE) {
- def_style_resid = value.data;
- }
- }
+ uint32_t def_style_theme_flags = 0U;
+ const auto default_style_bag = GetStyleBag(theme, def_style_attr, def_style_resid,
+ &def_style_theme_flags);
+ if (IsIOError(default_style_bag)) {
+ return base::unexpected(GetIOError(default_style_bag.error()));
}
// Retrieve the style resource ID associated with the current XML tag's style attribute.
- uint32_t style_resid = 0u;
- uint32_t style_flags = 0u;
- if (xml_parser != nullptr) {
- ssize_t idx = xml_parser->indexOfStyle();
- if (idx >= 0 && xml_parser->getAttributeValue(idx, &value) >= 0) {
- if (value.dataType == value.TYPE_ATTRIBUTE) {
- // Resolve the attribute with out theme.
- if (theme->GetAttribute(value.data, &value, &style_flags) == kInvalidCookie) {
- value.dataType = Res_value::TYPE_NULL;
- }
- }
-
- if (value.dataType == value.TYPE_REFERENCE) {
- style_resid = value.data;
- }
- }
- }
-
- // Retrieve the default style bag, if requested.
- const ResolvedBag* default_style_bag = nullptr;
- if (def_style_resid != 0) {
- default_style_bag = assetmanager->GetBag(def_style_resid);
- if (default_style_bag != nullptr) {
- def_style_flags |= default_style_bag->type_spec_flags;
- }
+ uint32_t xml_style_theme_flags = 0U;
+ const auto xml_style_bag = GetXmlStyleBag(theme, xml_parser, &def_style_theme_flags);
+ if (IsIOError(xml_style_bag)) {
+ return base::unexpected(GetIOError(xml_style_bag.error()));
}
- BagAttributeFinder def_style_attr_finder(default_style_bag);
-
- // Retrieve the style class bag, if requested.
- const ResolvedBag* xml_style_bag = nullptr;
- if (style_resid != 0) {
- xml_style_bag = assetmanager->GetBag(style_resid);
- if (xml_style_bag != nullptr) {
- style_flags |= xml_style_bag->type_spec_flags;
- }
- }
-
- BagAttributeFinder xml_style_attr_finder(xml_style_bag);
-
- // Retrieve the XML attributes, if requested.
+ BagAttributeFinder def_style_attr_finder(default_style_bag.value_or(nullptr));
+ BagAttributeFinder xml_style_attr_finder(xml_style_bag.value_or(nullptr));
XmlAttributeFinder xml_attr_finder(xml_parser);
// Now iterate through all of the attributes that the client has requested,
// filling in each with whatever data we can find.
for (size_t ii = 0; ii < attrs_length; ii++) {
const uint32_t cur_ident = attrs[ii];
+ DEBUG_LOG("RETRIEVING ATTR 0x%08x...", cur_ident);
- if (kDebugStyles) {
- ALOGI("RETRIEVING ATTR 0x%08x...", cur_ident);
- }
-
- ApkAssetsCookie cookie = kInvalidCookie;
- uint32_t type_set_flags = 0u;
-
- value.dataType = Res_value::TYPE_NULL;
- value.data = Res_value::DATA_NULL_UNDEFINED;
- config.density = 0;
+ AssetManager2::SelectedValue value{};
uint32_t value_source_resid = 0;
// Try to find a value for this attribute... we prioritize values
@@ -296,178 +264,152 @@ void ApplyStyle(Theme* theme, ResXMLParser* xml_parser, uint32_t def_style_attr,
const size_t xml_attr_idx = xml_attr_finder.Find(cur_ident);
if (xml_attr_idx != xml_attr_finder.end()) {
// We found the attribute we were looking for.
- xml_parser->getAttributeValue(xml_attr_idx, &value);
- if (kDebugStyles) {
- ALOGI("-> From XML: type=0x%x, data=0x%08x", value.dataType, value.data);
- }
+ Res_value attribute_value{};
+ xml_parser->getAttributeValue(xml_attr_idx, &attribute_value);
+ value.type = attribute_value.dataType;
+ value.data = attribute_value.data;
value_source_resid = xml_parser->getSourceResourceId();
+ DEBUG_LOG("-> From XML: type=0x%x, data=0x%08x", value.type, value.data);
}
- if (value.dataType == Res_value::TYPE_NULL && value.data != Res_value::DATA_NULL_EMPTY) {
+ if (value.type == Res_value::TYPE_NULL && value.data != Res_value::DATA_NULL_EMPTY) {
// Walk through the style class values looking for the requested attribute.
const ResolvedBag::Entry* entry = xml_style_attr_finder.Find(cur_ident);
if (entry != xml_style_attr_finder.end()) {
- // We found the attribute we were looking for.
- cookie = entry->cookie;
- type_set_flags = style_flags;
- value = entry->value;
+ value = AssetManager2::SelectedValue(*xml_style_bag, *entry);
+ value.flags |= xml_style_theme_flags;
value_source_resid = entry->style;
- if (kDebugStyles) {
- ALOGI("-> From style: type=0x%x, data=0x%08x, style=0x%08x", value.dataType, value.data,
- entry->style);
- }
+ DEBUG_LOG("-> From style: type=0x%x, data=0x%08x, style=0x%08x", value.type, value.data,
+ value_source_resid);
}
}
- if (value.dataType == Res_value::TYPE_NULL && value.data != Res_value::DATA_NULL_EMPTY) {
+ if (value.type == Res_value::TYPE_NULL && value.data != Res_value::DATA_NULL_EMPTY) {
// Walk through the default style values looking for the requested attribute.
const ResolvedBag::Entry* entry = def_style_attr_finder.Find(cur_ident);
if (entry != def_style_attr_finder.end()) {
- // We found the attribute we were looking for.
- cookie = entry->cookie;
- type_set_flags = def_style_flags;
- value = entry->value;
- if (kDebugStyles) {
- ALOGI("-> From def style: type=0x%x, data=0x%08x, style=0x%08x", value.dataType, value.data,
- entry->style);
- }
+ value = AssetManager2::SelectedValue(*default_style_bag, *entry);
+ value.flags |= def_style_theme_flags;
value_source_resid = entry->style;
+ DEBUG_LOG("-> From def style: type=0x%x, data=0x%08x, style=0x%08x", value.type, value.data,
+ entry->style);
}
}
- uint32_t resid = 0u;
- if (value.dataType != Res_value::TYPE_NULL) {
+ if (value.type != Res_value::TYPE_NULL) {
// Take care of resolving the found resource to its final value.
- ApkAssetsCookie new_cookie =
- theme->ResolveAttributeReference(cookie, &value, &config, &type_set_flags, &resid);
- if (new_cookie != kInvalidCookie) {
- cookie = new_cookie;
- }
-
- if (kDebugStyles) {
- ALOGI("-> Resolved attr: type=0x%x, data=0x%08x", value.dataType, value.data);
+ auto result = theme->ResolveAttributeReference(value);
+ if (UNLIKELY(IsIOError(result))) {
+ return base::unexpected(GetIOError(result.error()));
}
+ DEBUG_LOG("-> Resolved attr: type=0x%x, data=0x%08x", value.type, value.data);
} else if (value.data != Res_value::DATA_NULL_EMPTY) {
// If we still don't have a value for this attribute, try to find it in the theme!
- ApkAssetsCookie new_cookie = theme->GetAttribute(cur_ident, &value, &type_set_flags);
- // TODO: set value_source_resid for the style in the theme that was used.
- if (new_cookie != kInvalidCookie) {
- if (kDebugStyles) {
- ALOGI("-> From theme: type=0x%x, data=0x%08x", value.dataType, value.data);
- }
- new_cookie =
- assetmanager->ResolveReference(new_cookie, &value, &config, &type_set_flags, &resid);
- if (new_cookie != kInvalidCookie) {
- cookie = new_cookie;
- }
+ if (auto attr_value = theme->GetAttribute(cur_ident)) {
+ value = *attr_value;
+ DEBUG_LOG("-> From theme: type=0x%x, data=0x%08x", value.type, value.data);
- if (kDebugStyles) {
- ALOGI("-> Resolved theme: type=0x%x, data=0x%08x", value.dataType, value.data);
+ auto result = assetmanager->ResolveReference(value, true /* cache_value */);
+ if (UNLIKELY(IsIOError(result))) {
+ return base::unexpected(GetIOError(result.error()));
}
+ DEBUG_LOG("-> Resolved theme: type=0x%x, data=0x%08x", value.type, value.data);
+ // TODO: set value_source_resid for the style in the theme that was used.
}
}
// Deal with the special @null value -- it turns back to TYPE_NULL.
- if (value.dataType == Res_value::TYPE_REFERENCE && value.data == 0) {
- if (kDebugStyles) {
- ALOGI("-> Setting to @null!");
- }
- value.dataType = Res_value::TYPE_NULL;
+ if (value.type == Res_value::TYPE_REFERENCE && value.data == 0U) {
+ DEBUG_LOG("-> Setting to @null!");
+ value.type = Res_value::TYPE_NULL;
value.data = Res_value::DATA_NULL_UNDEFINED;
- cookie = kInvalidCookie;
+ value.cookie = kInvalidCookie;
}
- if (kDebugStyles) {
- ALOGI("Attribute 0x%08x: type=0x%x, data=0x%08x", cur_ident, value.dataType, value.data);
- }
+ DEBUG_LOG("Attribute 0x%08x: type=0x%x, data=0x%08x", cur_ident, value.type, value.data);
// Write the final value back to Java.
- out_values[STYLE_TYPE] = value.dataType;
+ out_values[STYLE_TYPE] = value.type;
out_values[STYLE_DATA] = value.data;
- out_values[STYLE_ASSET_COOKIE] = ApkAssetsCookieToJavaCookie(cookie);
- out_values[STYLE_RESOURCE_ID] = resid;
- out_values[STYLE_CHANGING_CONFIGURATIONS] = type_set_flags;
- out_values[STYLE_DENSITY] = config.density;
+ out_values[STYLE_ASSET_COOKIE] = ApkAssetsCookieToJavaCookie(value.cookie);
+ out_values[STYLE_RESOURCE_ID] = value.resid;
+ out_values[STYLE_CHANGING_CONFIGURATIONS] = value.flags;
+ out_values[STYLE_DENSITY] = value.config.density;
out_values[STYLE_SOURCE_RESOURCE_ID] = value_source_resid;
- if (value.dataType != Res_value::TYPE_NULL || value.data == Res_value::DATA_NULL_EMPTY) {
- indices_idx++;
-
+ if (value.type != Res_value::TYPE_NULL || value.data == Res_value::DATA_NULL_EMPTY) {
// out_indices must NOT be nullptr.
- out_indices[indices_idx] = ii;
+ out_indices[++indices_idx] = ii;
}
out_values += STYLE_NUM_ENTRIES;
}
// out_indices must NOT be nullptr.
out_indices[0] = indices_idx;
+ return {};
}
-bool RetrieveAttributes(AssetManager2* assetmanager, ResXMLParser* xml_parser, uint32_t* attrs,
- size_t attrs_length, uint32_t* out_values, uint32_t* out_indices) {
- ResTable_config config;
- Res_value value;
-
+base::expected<std::monostate, IOError> RetrieveAttributes(AssetManager2* assetmanager,
+ ResXMLParser* xml_parser,
+ uint32_t* attrs,
+ size_t attrs_length,
+ uint32_t* out_values,
+ uint32_t* out_indices) {
int indices_idx = 0;
// Retrieve the XML attributes, if requested.
- const size_t xml_attr_count = xml_parser->getAttributeCount();
size_t ix = 0;
+ const size_t xml_attr_count = xml_parser->getAttributeCount();
uint32_t cur_xml_attr = xml_parser->getAttributeNameResID(ix);
// Now iterate through all of the attributes that the client has requested,
// filling in each with whatever data we can find.
for (size_t ii = 0; ii < attrs_length; ii++) {
const uint32_t cur_ident = attrs[ii];
- ApkAssetsCookie cookie = kInvalidCookie;
- uint32_t type_set_flags = 0u;
-
- value.dataType = Res_value::TYPE_NULL;
- value.data = Res_value::DATA_NULL_UNDEFINED;
- config.density = 0;
+ AssetManager2::SelectedValue value{};
// Try to find a value for this attribute...
// Skip through XML attributes until the end or the next possible match.
while (ix < xml_attr_count && cur_ident > cur_xml_attr) {
- ix++;
- cur_xml_attr = xml_parser->getAttributeNameResID(ix);
+ cur_xml_attr = xml_parser->getAttributeNameResID(++ix);
}
+
// Retrieve the current XML attribute if it matches, and step to next.
if (ix < xml_attr_count && cur_ident == cur_xml_attr) {
- xml_parser->getAttributeValue(ix, &value);
- ix++;
- cur_xml_attr = xml_parser->getAttributeNameResID(ix);
+ Res_value attribute_value{};
+ xml_parser->getAttributeValue(ix, &attribute_value);
+ value.type = attribute_value.dataType;
+ value.data = attribute_value.data;
+ cur_xml_attr = xml_parser->getAttributeNameResID(++ix);
}
- uint32_t resid = 0u;
- if (value.dataType != Res_value::TYPE_NULL) {
+ if (value.type != Res_value::TYPE_NULL) {
// Take care of resolving the found resource to its final value.
- ApkAssetsCookie new_cookie =
- assetmanager->ResolveReference(cookie, &value, &config, &type_set_flags, &resid);
- if (new_cookie != kInvalidCookie) {
- cookie = new_cookie;
+ auto result = assetmanager->ResolveReference(value);
+ if (UNLIKELY(IsIOError(result))) {
+ return base::unexpected(GetIOError(result.error()));
}
}
// Deal with the special @null value -- it turns back to TYPE_NULL.
- if (value.dataType == Res_value::TYPE_REFERENCE && value.data == 0) {
- value.dataType = Res_value::TYPE_NULL;
+ if (value.type == Res_value::TYPE_REFERENCE && value.data == 0U) {
+ value.type = Res_value::TYPE_NULL;
value.data = Res_value::DATA_NULL_UNDEFINED;
- cookie = kInvalidCookie;
+ value.cookie = kInvalidCookie;
}
// Write the final value back to Java.
- out_values[STYLE_TYPE] = value.dataType;
+ out_values[STYLE_TYPE] = value.type;
out_values[STYLE_DATA] = value.data;
- out_values[STYLE_ASSET_COOKIE] = ApkAssetsCookieToJavaCookie(cookie);
- out_values[STYLE_RESOURCE_ID] = resid;
- out_values[STYLE_CHANGING_CONFIGURATIONS] = type_set_flags;
- out_values[STYLE_DENSITY] = config.density;
+ out_values[STYLE_ASSET_COOKIE] = ApkAssetsCookieToJavaCookie(value.cookie);
+ out_values[STYLE_RESOURCE_ID] = value.resid;
+ out_values[STYLE_CHANGING_CONFIGURATIONS] = value.flags;
+ out_values[STYLE_DENSITY] = value.config.density;
if (out_indices != nullptr &&
- (value.dataType != Res_value::TYPE_NULL || value.data == Res_value::DATA_NULL_EMPTY)) {
- indices_idx++;
- out_indices[indices_idx] = ii;
+ (value.type != Res_value::TYPE_NULL ||
+ value.data == Res_value::DATA_NULL_EMPTY)) {
+ out_indices[++indices_idx] = ii;
}
out_values += STYLE_NUM_ENTRIES;
@@ -476,7 +418,7 @@ bool RetrieveAttributes(AssetManager2* assetmanager, ResXMLParser* xml_parser, u
if (out_indices != nullptr) {
out_indices[0] = indices_idx;
}
- return true;
+ return {};
}
} // namespace android
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-11-04 15:46:27 +0000