| /* |
| * Copyright (C) 2014 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.tools.idea.avdmanager; |
| |
| import com.android.annotations.VisibleForTesting; |
| import com.android.tools.idea.templates.TemplateUtils; |
| import com.google.common.base.Splitter; |
| import com.google.common.collect.Maps; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Allows access to Device Skin Layout files. The layout file syntax is of the form: |
| * <pre> |
| * key { |
| * subkey { |
| * arbitrary-subkey { |
| * keypair-key keypair-value |
| * } |
| * } |
| * } |
| * </pre> |
| */ |
| public class SkinLayoutDefinition { |
| |
| @VisibleForTesting static final Pattern ourQuerySeparator = Pattern.compile("\\."); |
| @VisibleForTesting static final Pattern ourWhitespacePattern = Pattern.compile("\\s+"); |
| |
| @Nullable |
| public static SkinLayoutDefinition parseFile(@NotNull File file) { |
| String contents = TemplateUtils.readTextFile(file); |
| if (contents == null) { |
| return null; |
| } |
| return loadFromTokens(Splitter.on(ourWhitespacePattern).omitEmptyStrings().trimResults().split(contents).iterator()); |
| } |
| |
| /** |
| * Populate myProperties and myChildren from the token stream |
| * @param tokens a queue of string tokens |
| */ |
| @VisibleForTesting |
| static SkinLayoutDefinition loadFromTokens(Iterator<String> tokens) { |
| String key; |
| String value; |
| SkinLayoutDefinition definition = new SkinLayoutDefinition(); |
| while (tokens.hasNext()) { |
| key = tokens.next(); |
| if (key.equals("}")) { // We're done with this block, return |
| break; |
| } else { |
| value = tokens.next(); |
| if (value.equals("{")) { // Start of a nested block, recursively load that block |
| definition.myChildren.put(key, loadFromTokens(tokens)); |
| } else { // Otherwise, it's a string property, and we'll store it |
| definition.myProperties.put(key, value); |
| } |
| } |
| } |
| return definition; |
| } |
| |
| private Map<String, String> myProperties = Maps.newHashMap(); |
| private Map<String, SkinLayoutDefinition> myChildren = Maps.newHashMap(); |
| |
| private SkinLayoutDefinition() { |
| // Private constructor. Use #parseFile to obtain an instance |
| } |
| |
| /** |
| * Returns the property associated with the given query string or null if no such property exists. |
| * Example: Given |
| * <pre> |
| * foo { |
| * bar { |
| * abc 123 |
| * } |
| * baz { |
| * hello world |
| * } |
| * } |
| * </pre> |
| * The query string "foo.bar.abc" would return the string "123" and the query string "foo.baz.hello" would return "world." |
| * The query string "foo.bar.def" would return null because the key referenced does not exist. |
| * The query string "foo.bar" would return null because it represents an incomplete path. |
| * @param queryString a dot-separated list of string keys |
| */ |
| @Nullable |
| public String get(@NotNull String queryString) { |
| return get(Splitter.on(ourQuerySeparator).split(queryString).iterator()); |
| } |
| |
| @Nullable |
| private String get(@NotNull Iterator<String> queryIterator) { |
| if (!queryIterator.hasNext()) { |
| return null; |
| } |
| String key = queryIterator.next(); |
| if (!queryIterator.hasNext()) { |
| return myProperties.get(key); |
| } else { |
| SkinLayoutDefinition child = myChildren.get(key); |
| if (child != null) { |
| return child.get(queryIterator); |
| } else { |
| return null; |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| makeString(sb, 1); |
| return sb.toString(); |
| } |
| |
| /** |
| * @param depth number of 2-space indents to apply |
| */ |
| private void makeString(@NotNull StringBuilder sb, int depth) { |
| sb.append("{\n"); |
| for (String key : myProperties.keySet()) { |
| appendSpace(sb, depth); |
| sb.append(key); |
| sb.append(" "); |
| sb.append(myProperties.get(key)); |
| sb.append("\n"); |
| } |
| for (String key : myChildren.keySet()) { |
| appendSpace(sb, depth); |
| sb.append(key); |
| sb.append(" "); |
| myChildren.get(key).makeString(sb, depth + 1); |
| } |
| appendSpace(sb, depth - 1); |
| sb.append("}\n"); |
| } |
| |
| private static void appendSpace(@NotNull StringBuilder sb, int depth) { |
| for (int i = 0; i < depth; i++) { |
| sb.append(" "); |
| } |
| } |
| } |