AAPT2

First checking of AAPT2. The individual phases of AAPT2 work, but there
are some missing pieces.

For early testing we are missing:
- Need to properly mark file references and include them in package
- Need to package into zip

Final AAPT for apps we are missing:
- Need to crush PNGs
- Need to parse 9-patches
- Need to validate all of AndroidManifest.xml
- Need to write align method to align resource tables for splits.

Final AAPT for apps + system we are missing:
- Need to handle overlays
- Need to store comments for R file
- Need to handle --shared-lib (dynamic references too).

New AAPT features coming:
- Need to import compiled libraries
    - Name mangling
    - R file generation for library code

Change-Id: I95f8a63581b81a1f424ae6fb2c373c883b72c18d

1 files changed, 68 insertions, 0 deletions

diff --git a/tools/aapt2/XmlFlattener.h b/tools/aapt2/XmlFlattener.h
new file mode 100644
index 0000000..abf64ab
--- /dev/null
+++ b/tools/aapt2/XmlFlattener.h
@@ -0,0 +1,68 @@
+/*
+ * 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.
+ */
+
+#ifndef AAPT_XML_FLATTENER_H
+#define AAPT_XML_FLATTENER_H
+
+#include "BigBuffer.h"
+#include "Maybe.h"
+#include "Resolver.h"
+#include "Source.h"
+#include "XmlPullParser.h"
+
+namespace aapt {
+
+/**
+ * Flattens an XML file into a binary representation parseable by
+ * the Android resource system. References to resources are checked
+ * and string values are transformed to typed data where possible.
+ */
+class XmlFlattener {
+public:
+    struct Options {
+        /**
+         * If set, tells the XmlFlattener to strip out
+         * attributes that have been introduced after
+         * max SDK.
+         */
+        Maybe<size_t> maxSdkAttribute;
+    };
+
+    /**
+     * Creates a flattener with a Resolver to resolve references
+     * and attributes.
+     */
+    XmlFlattener(const std::shared_ptr<Resolver>& resolver);
+
+    XmlFlattener(const XmlFlattener&) = delete; // Not copyable.
+
+    /**
+     * Flatten an XML file, reading from the XML parser and writing to the
+     * BigBuffer. The source object is mainly for logging errors. If the
+     * function succeeds, returns the smallest SDK version of an attribute that
+     * was stripped out. If no attributes were stripped out, the return value
+     * is 0.
+     */
+    Maybe<size_t> flatten(const Source& source, const std::shared_ptr<XmlPullParser>& parser,
+                          BigBuffer* outBuffer, Options options);
+
+private:
+    std::shared_ptr<Resolver> mResolver;
+};
+
+} // namespace aapt
+
+#endif // AAPT_XML_FLATTENER_H