1 files changed, 121 insertions, 0 deletions
diff --git a/tools/ahat/src/DocString.java b/tools/ahat/src/DocString.java
new file mode 100644
index 0000000000..1d997dc969
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+++ b/tools/ahat/src/DocString.java
@@ -0,0 +1,121 @@
+/*
+ * 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.
+ */
+
+package com.android.ahat;
+
+import com.google.common.html.HtmlEscapers;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+/**
+ * A class representing a small string of document content consisting of text,
+ * links, images, etc.
+ */
+class DocString {
+  private StringBuilder mStringBuilder;
+
+  public DocString() {
+    mStringBuilder = new StringBuilder();
+  }
+
+  /**
+   * Construct a new DocString, initialized with the given text.
+   * Format arguments are supported.
+   */
+  public static DocString text(String format, Object... args) {
+    DocString doc = new DocString();
+    return doc.append(format, args);
+  }
+
+  /**
+   * Construct a new DocString, initialized with the given link.
+   */
+  public static DocString link(URI uri, DocString content) {
+    DocString doc = new DocString();
+    return doc.appendLink(uri, content);
+
+  }
+
+  /**
+   * Construct a new DocString initialized with the given image.
+   */
+  public static DocString image(URI uri, String alt) {
+    return (new DocString()).appendImage(uri, alt);
+  }
+
+  /**
+   * Append literal text to the given doc string.
+   * Format arguments are supported.
+   * Returns this object.
+   */
+  public DocString append(String format, Object... args) {
+    String text = String.format(format, args);
+    mStringBuilder.append(HtmlEscapers.htmlEscaper().escape(text));
+    return this;
+  }
+
+  public DocString append(DocString str) {
+    mStringBuilder.append(str.html());
+    return this;
+  }
+
+  public DocString appendLink(URI uri, DocString content) {
+    mStringBuilder.append("<a href=\"");
+    mStringBuilder.append(uri.toASCIIString());
+    mStringBuilder.append("\">");
+    mStringBuilder.append(content.html());
+    mStringBuilder.append("</a>");
+    return this;
+  }
+
+  public DocString appendImage(URI uri, String alt) {
+    mStringBuilder.append("<img alt=\"");
+    mStringBuilder.append(HtmlEscapers.htmlEscaper().escape(alt));
+    mStringBuilder.append("\" src=\"");
+    mStringBuilder.append(uri.toASCIIString());
+    mStringBuilder.append("\" />");
+    return this;
+  }
+
+  public DocString appendThumbnail(URI uri, String alt) {
+    mStringBuilder.append("<img height=\"16\" alt=\"");
+    mStringBuilder.append(HtmlEscapers.htmlEscaper().escape(alt));
+    mStringBuilder.append("\" src=\"");
+    mStringBuilder.append(uri.toASCIIString());
+    mStringBuilder.append("\" />");
+    return this;
+  }
+
+  /**
+   * Convenience function for constructing a URI from a string with a uri
+   * known to be valid. Format arguments are supported.
+   */
+  public static URI uri(String format, Object... args) {
+    String uriString = String.format(format, args);
+    try {
+      return new URI(uriString);
+    } catch (URISyntaxException e) {
+      throw new IllegalStateException("Known good uri has syntax error: " + uriString, e);
+    }
+  }
+
+  /**
+   * Render the DocString as html.
+   */
+  public String html() {
+    return mStringBuilder.toString();
+  }
+}