Add support for 'display' in Manifest.

content/renderer/manifest/manifest_parser.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/manifest/manifest_parser.h"
 
 #include "base/json/json_reader.h"
 #include "base/strings/nullable_string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "content/public/common/manifest.h"
 
+namespace content {
+
 namespace {
 
+enum TrimType {
+  Trim,
+  NoTrim
+};
+
+base::NullableString16 ParseString(const base::DictionaryValue& dictionary,
+                                   const std::string& key,
+                                   TrimType trim) {
+  if (!dictionary.HasKey(key))
+    return base::NullableString16();
+
+  base::string16 value;
+  if (!dictionary.GetString(key, &value)) {
+    // TODO(mlamouri): provide a custom message to the developer console about
+    // the property being incorrectly set.
+    return base::NullableString16();
+  }
+
+  if (trim == Trim)
+    base::TrimWhitespace(value, base::TRIM_ALL, &value);
+  return base::NullableString16(value, false);
+}
+
 // Parses the 'name' field of the manifest, as defined in:
 // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-name-member
 // Returns the parsed string if any, a null string if the parsing failed.
 base::NullableString16 ParseName(const base::DictionaryValue& dictionary)  {
-  if (!dictionary.HasKey("name"))
-    return base::NullableString16();
-
-  base::string16 name;
-  if (!dictionary.GetString("name", &name)) {
-    // TODO(mlamouri): provide a custom message to the developer console.
-    return base::NullableString16();
-  }
-
-  base::TrimWhitespace(name, base::TRIM_ALL, &name);
-  return base::NullableString16(name, false);
+  return ParseString(dictionary, "name", Trim);
 }
 
 // Parses the 'short_name' field of the manifest, as defined in:
 // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-short-name-member
 // Returns the parsed string if any, a null string if the parsing failed.
 base::NullableString16 ParseShortName(
     const base::DictionaryValue& dictionary)  {
-  if (!dictionary.HasKey("short_name"))
-    return base::NullableString16();
-
-  base::string16 short_name;
-  if (!dictionary.GetString("short_name", &short_name)) {
-    // TODO(mlamouri): provide a custom message to the developer console.
-    return base::NullableString16();
-  }
-
-  base::TrimWhitespace(short_name, base::TRIM_ALL, &short_name);
-  return base::NullableString16(short_name, false);
+  return ParseString(dictionary, "short_name", Trim);
 }
 
 // Parses the 'start_url' field of the manifest, as defined in:
 // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-start_url-member
 // Returns the parsed GURL if any, an empty GURL if the parsing failed.
 GURL ParseStartURL(const base::DictionaryValue& dictionary,
                    const GURL& manifest_url,
                    const GURL& document_url) {
-  if (!dictionary.HasKey("start_url"))
+  base::NullableString16 start_url_str =
+      ParseString(dictionary, "start_url", NoTrim);
+
+  if (start_url_str.is_null())
     return GURL();
 
-  base::string16 start_url_str;
-  if (!dictionary.GetString("start_url", &start_url_str)) {
-    // TODO(mlamouri): provide a custom message to the developer console.
-    return GURL();
-  }
-
-  GURL start_url = manifest_url.Resolve(start_url_str);
+  GURL start_url = manifest_url.Resolve(start_url_str.string());
   if (!start_url.is_valid())
     return GURL();
 
   if (start_url.GetOrigin() != document_url.GetOrigin()) {
     // TODO(mlamouri): provide a custom message to the developer console.
     return GURL();
   }
 
   return start_url;
 }
 
+// Parses the 'display' field of the manifest, as defined in:
+// http://w3c.github.io/manifest/#dfn-steps-for-processing-the-display-member
+// Returns the parsed DisplayMode if any, DISPLAY_MODE_UNSPECIFIED if the
+// parsing failed.
+Manifest::DisplayMode ParseDisplay(const base::DictionaryValue& dictionary) {
+  base::NullableString16 display = ParseString(dictionary, "display", Trim);
+
+  if (display.is_null())
+    return Manifest::DISPLAY_MODE_UNSPECIFIED;
+
+  if (LowerCaseEqualsASCII(display.string(), "fullscreen"))
+    return Manifest::DISPLAY_MODE_FULLSCREEN;
+  else if (LowerCaseEqualsASCII(display.string(), "standalone"))
+    return Manifest::DISPLAY_MODE_STANDALONE;
+  else if (LowerCaseEqualsASCII(display.string(), "minimal-ui"))
+    return Manifest::DISPLAY_MODE_MINIMAL_UI;
+  else if (LowerCaseEqualsASCII(display.string(), "browser"))
+    return Manifest::DISPLAY_MODE_BROWSER;
+  else
+    return Manifest::DISPLAY_MODE_UNSPECIFIED;
+}
+
 } // anonymous namespace
 
-namespace content {
-
 Manifest ManifestParser::Parse(const base::StringPiece& json,
                                const GURL& manifest_url,
                                const GURL& document_url) {
   scoped_ptr<base::Value> value(base::JSONReader::Read(json));
   if (!value) {
     // TODO(mlamouri): get the JSON parsing error and report it to the developer
     // console.
     return Manifest();
   }
 
   if (value->GetType() != base::Value::TYPE_DICTIONARY) {
     // TODO(mlamouri): provide a custom message to the developer console.
     return Manifest();
   }
 
   base::DictionaryValue* dictionary = 0;
   value->GetAsDictionary(&dictionary);
   if (!dictionary) {
     // TODO(mlamouri): provide a custom message to the developer console.
     return Manifest();
   }
 
   Manifest manifest;
 
   manifest.name = ParseName(*dictionary);
   manifest.short_name = ParseShortName(*dictionary);
   manifest.start_url = ParseStartURL(*dictionary, manifest_url, document_url);
+  manifest.display = ParseDisplay(*dictionary);
 
   return manifest;
 }
 
 } // namespace content