New layout optimization tool. Run layoutopt on the command line.

Change-Id: I8e4697e19ca8a203dc8a41b464f7cb46d52184b0

tools/layoutopt/app/src/Android.mk

@@ -0,0 +1,15 @@
+# Copyright 2009 The Android Open Source Project
+#
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(call all-subdir-java-files)
+LOCAL_JAVA_RESOURCE_DIRS := resources
+
+LOCAL_JAR_MANIFEST := ../etc/manifest.txt
+LOCAL_JAVA_LIBRARIES := \
+	uix
+LOCAL_MODULE := layoutopt
+
+include $(BUILD_HOST_JAVA_LIBRARY)
+

tools/layoutopt/app/src/com/android/layoutopt/cli/Main.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+package com.android.layoutopt.cli;
+
+import com.android.layoutopt.uix.LayoutAnalyzer;
+import com.android.layoutopt.uix.LayoutAnalysis;
+
+import java.io.File;
+import java.util.List;
+import java.util.ArrayList;
+
+/**
+ * Command line utility for the uix library.
+ *
+ * This is a simple CLI front-end for the uix library, used to
+ * analyze and optimize Android layout files.
+ */
+public class Main {
+    /**
+     * Main entry point of the application.
+     *
+     * @param args One mandatory parameter, a path (absolute or relative)
+     *             to an Android XML layout file
+     */
+    public static void main(String[] args) {
+        Parameters p = checkParameters(args);
+        if (!p.valid) {
+            displayHelpMessage();
+            exit();
+        }
+
+        analyzeFiles(p.files);
+    }
+
+    private static void analyzeFiles(File[] files) {
+        LayoutAnalyzer analyzer = new LayoutAnalyzer();
+        for (File file : files) {
+            if (file.isFile()) {
+                analyze(analyzer, file);
+            } else {
+                analyzeFiles(file.listFiles());
+            }
+        }
+    }
+
+    private static void analyze(LayoutAnalyzer analyzer, File file) {
+        LayoutAnalysis analysis = analyzer.analyze(file);
+        System.out.println(analysis.getName());
+        for (LayoutAnalysis.Issue issue : analysis.getIssues()) {
+            System.out.print(String.format("\t%d:%d ", issue.getStartLine(), issue.getEndLine()));
+            System.out.println(issue.getDescription());
+        }
+    }
+
+    /**
+     * Exits the tool.
+     */
+    private static void exit() {
+        System.exit(0);
+    }
+
+    /**
+     * Displays this tool's help message on the standard output.
+     */
+    private static void displayHelpMessage() {
+        System.out.println("usage: layoutopt <directories/files to analyze>");
+    }
+
+    /**
+     * Builds a valid Parameters object. Parses the paramters if necessary
+     * and checks for errors.
+     *
+     * @param args The parameters passed from the CLI.
+     */
+    private static Parameters checkParameters(String[] args) {
+        Parameters p = new Parameters();
+
+        if (args.length < 1) {
+            p.valid = false;
+        } else {
+            List<File> files = new ArrayList<File>();
+            for (String path : args) {
+                File file = new File(path);
+                if (file.exists()) {
+                    files.add(file);
+                }
+            }
+            p.files = files.toArray(new File[files.size()]);
+            p.valid = true;
+        }
+
+        return p;
+    }
+
+    /**
+     * Parameters parsed from the CLI.
+     */
+    private static class Parameters {
+        /**
+         * True if this list of parameters is valid, false otherwise.
+         */
+        boolean valid;
+
+        /**
+         * Paths (absolute or relative) to the files to be analyzed.
+         */
+        File[] files;
+    }
+}