[Local NTP] Adding NtpDesign class to parametrizing NTP design specs

chrome/browser/resources/local_ntp/local_ntp_design.js

+// 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.
+
+
+/**
+ * @fileoverview Specifications for the NTP design, and an accessor to presets.
+ */
+
+
+/**
+ * Specifications for an NTP design (not comprehensive).
+ *
+ * name: A unique identifier for the style.
+ *   appropriate CSS will take effect.
+ * fontFamily: Font family to use for title and thumbnail <iframe>s.
+ * fontSize: Font size to use for the <iframe>s, in px.
+ * tileWidth: The width of each suggestion tile, in px.
+ * tileMargin: Spacing between successive tiles, in px.
+ * titleColor: The RRGGBB color of title text.
+ * titleTextAlign: (Optional) The alignment of title text. If unspecified, the
+ *   default value is 'center'.
+ * titleTextFade: (Optional) The number of pixels beyond which title
+ *   text begins to fade. This overrides the default ellipsis style.
+ * thumbnailTextColor: The RRGGBB color that thumbnail <iframe> may use to
+ *   display text message in place of missing thumbnail.
+ *
+ * @typedef {{
+ *   name: string,
+ *   fontFamily: string,
+ *   fontSize: number,
+ *   tileWidth: number,
+ *   tileMargin: number,
+ *   titleColor: string,
+ *   titleTextAlign: string|null|undefined,
+ *   titleTextFade: string|null|undefined,
+ *   thumbnailTextColor: string
+ * }}
+ */
+var NtpDesign;
+
+/**
+ * Returns an NTP design corresponding to the given name.
+ * @param {string|undefined} opt_name The name of the design. If undefined, then
+ *   the default design is specified.
+ * @return {NtpDesign} The NTP design corresponding to name.
+ */
+function getNtpDesign(opt_name) {
+  // TODO(huangs): Add new style.
+  return {
+    name: 'classical',
+    fontFamily: 'arial, sans-serif',
+    fontSize: 11,
+    tileWidth: 140,
+    tileMargin: 20,
+    titleColor: '777777',
+    // No titleTextAlign: defaults to 'center'.
+    // No titleTextFade: by default we have ellipsis.
+    thumbnailTextColor: '777777'
+  };
+}