Allow themes to change the background of the new tab page....

chrome/browser/dom_ui/dom_ui_theme_source.cc

 // Copyright (c) 2009 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 "chrome/browser/dom_ui/dom_ui_theme_source.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "app/theme_provider.h"
 #include "base/gfx/png_encoder.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "chrome/browser/browser_theme_provider.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/theme_resources_util.h"
 #include "chrome/common/url_constants.h"
 #include "googleurl/src/gurl.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 
+#if defined(OS_WIN)
+#include "chrome/browser/views/bookmark_bar_view.h"
+#endif
+
 // Path for the New Tab CSS. When we get more than a few of these, we should
 // use a resource map rather than hard-coded strings.
 static const char* kNewTabCSSPath = "css/newtab.css";
 
 static string16 SkColorToRGBAString(SkColor color) {
   return WideToUTF16(l10n_util::GetStringF(IDS_RGBA_CSS_FORMAT_STRING,
       IntToWString(SkColorGetR(color)),
       IntToWString(SkColorGetG(color)),
       IntToWString(SkColorGetB(color)),
       DoubleToWString(SkColorGetA(color) / 255.0)));
@@ skipping 45 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DOMUIThemeSource, private:
 
 void DOMUIThemeSource::SendNewTabCSS(int request_id) {
   ThemeProvider* tp = profile_->GetThemeProvider();
   DCHECK(tp);
 
   // Get our theme colors
+  SkColor color_background =
+      tp->GetColor(BrowserThemeProvider::COLOR_NTP_BACKGROUND);
   SkColor color_text = tp->GetColor(BrowserThemeProvider::COLOR_NTP_TEXT);
   SkColor color_link = tp->GetColor(BrowserThemeProvider::COLOR_NTP_LINK);
   SkColor color_section =
       tp->GetColor(BrowserThemeProvider::COLOR_NTP_SECTION);
 
   // Generate the replacements.
   std::vector<string16> subst;
 
   // Cache-buster for background.
   subst.push_back(UTF8ToUTF16(IntToString(static_cast<int>(
       base::Time::Now().ToDoubleT()))));
 
   // Colors.
+  subst.push_back(SkColorToRGBAString(color_background));
+  subst.push_back(UTF8ToUTF16(GetNewTabBackgroundCSS(false)));
+  subst.push_back(UTF8ToUTF16(GetNewTabBackgroundCSS(true)));
   subst.push_back(SkColorToRGBAString(color_text));
   subst.push_back(SkColorToRGBAString(color_link));
   subst.push_back(SkColorToRGBAString(color_section));
 
   // Get our template.
   static const StringPiece new_tab_theme_css(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
       IDR_NEW_TAB_THEME_CSS));
 
   // Create the string from our template and the replacements.
@@ skipping 16 matching lines @@
 
   SkBitmap* image = tp->GetBitmapNamed(resource_id);
   DCHECK(image);
   std::vector<unsigned char> png_bytes;
   PNGEncoder::EncodeBGRASkBitmap(*image, false, &png_bytes);
 
   scoped_refptr<RefCountedBytes> image_data =
       new RefCountedBytes(png_bytes);
   SendResponse(request_id, image_data);
 }
+
+std::string DOMUIThemeSource::GetNewTabBackgroundCSS(bool bar_attached) {
+  int alignment;
+  profile_->GetThemeProvider()->GetDisplayProperty(
+      BrowserThemeProvider::NTP_BACKGROUND_ALIGNMENT, &alignment);
+
+  if (bar_attached)
+    return BrowserThemeProvider::AlignmentToString(alignment);
+
+  // The bar is detached, so we must offset the background by the bar size
+  // if it's a top-aligned bar.
+#if defined(OS_WIN)
+  int offset = BookmarkBarView::kNewtabBarHeight;
+#else
+  int offset = 0;
+#endif
+
+  if (alignment & BrowserThemeProvider::ALIGN_TOP) {
+    if (alignment & BrowserThemeProvider::ALIGN_LEFT)
+      return "0% " + IntToString(-offset) + "px";
+    else if (alignment & BrowserThemeProvider::ALIGN_RIGHT)
+      return "100% " + IntToString(-offset) + "px";
+    return IntToString(-offset) + "px";
+  }
+  return BrowserThemeProvider::AlignmentToString(alignment);
+}
+