[Local NTP] Implementing Material Design styling

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.
+ * @fileoverview Specifications for NTP design, and an accessor to presets.
  */
 
+ var THUMBNAIL_FALLBACK = {
+   DOT: 'dot'  // Draw single dot.
+ };
 
 /**
  * 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.
+ * titleColorAgainstDark: The RRGGBB color of title text against a dark theme.
  * 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.
+ * thumbnailFallback: (Optional) A value in THUMBNAIL_FALLBACK to specify the
+ *   thumbnail fallback strategy. If unassigned, then the thumbnail.html
+ *   <iframe> would handle the fallback.
+ * showFakeboxHint: Whether to display text in the fakebox.
  *
  * @typedef {{
  *   name: string,
  *   fontFamily: string,
  *   fontSize: number,
  *   tileWidth: number,
  *   tileMargin: number,
  *   titleColor: string,
+ *   titleColorAgainstDark: string,
  *   titleTextAlign: string|null|undefined,
  *   titleTextFade: string|null|undefined,
- *   thumbnailTextColor: string
+ *   thumbnailTextColor: string,
+ *   thumbnailFallback: string|null|undefined
+ *   showFakeboxHint: string|null|undefined
  * }}
  */
 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'
-  };
+  var ntpDesign = null;
+
+  if (opt_name === 'md') {
+    ntpDesign = {
+      name: opt_name,
+      fontFamily: 'arial, sans-serif',
+      fontSize: 12,
+      tileWidth: 146,
+      tileMargin: 12,
+      titleColor: '000000',
+      titleColorAgainstDark: 'd2d2d2',
+      titleTextAlign: 'inherit',
+      titleTextFade: 112 - 24,  // 112px wide title with 24 pixel fade at end.
+      thumbnailTextColor: '777777',
+      thumbnailFallback: THUMBNAIL_FALLBACK.DOT,
+      showFakeboxHint: true
+    };
+  } else {
+    ntpDesign = {
+      name: 'classical',
+      fontFamily: 'arial, sans-serif',
+      fontSize: 11,
+      tileWidth: 140,
+      tileMargin: 20,
+      titleColor: '777777',
+      titleColorAgainstDark: '777777',
+      titleTextAlign: 'center',
+      titleTextFade: null,  // Default to ellipsis.
+      thumbnailTextColor: '777777',
+      thumbnailFallback: null,  // Default to false.
+      showFakeboxHint: false
+    };
+  }
+  return ntpDesign;
 }