Theme Preferences for Distilled Pages

components/dom_distiller/core/viewer.cc

Index: components/dom_distiller/core/viewer.cc
diff --git a/components/dom_distiller/core/viewer.cc b/components/dom_distiller/core/viewer.cc
index e3c77962dce2a522e0c6ae5ccf016f09629151eb..85dacd82cab9c438c67b3ef27ee9a7837da1e1f7 100644
--- a/components/dom_distiller/core/viewer.cc
+++ b/components/dom_distiller/core/viewer.cc
@@ -13,6 +13,7 @@
 #include "components/dom_distiller/core/dom_distiller_service.h"
 #include "components/dom_distiller/core/proto/distilled_article.pb.h"
 #include "components/dom_distiller/core/proto/distilled_page.pb.h"
+#include "components/dom_distiller/core/reader_mode_preferences.h"
 #include "components/dom_distiller/core/task_tracker.h"
 #include "components/dom_distiller/core/url_constants.h"
 #include "components/dom_distiller/core/url_utils.h"
@@ -28,6 +29,14 @@ namespace dom_distiller {
 
 namespace {
 
+std::string GetBodyInsertionText(ReaderModePrefs* reader_mode_prefs) {
+  if (reader_mode_prefs->GetHighContrastPref()) {
+    return "background-color: #000;\ncolor: #FFF;";  // White on black.

[nyquist, 2014/06/24 23:08:49]

Could you have this as a CSS class on the document body instead, and then pass
in the current class to ReplaceHtmlTemplateValues?

I think that will set you up for success for automatically changing it without
reloading the page later.

[smaslo, 2014/06/26 20:05:38]

Done.

+  } else {
+    return "background-color: #FFF;\ncolor: #000;";  // Black on white.
+  }
+}
+
 std::string ReplaceHtmlTemplateValues(
     const std::string& title,
     const std::string& content,
@@ -127,10 +136,13 @@ const std::string GetErrorPageHtml() {
   return ReplaceHtmlTemplateValues(title, content, "hidden", "");
 }
 
-const std::string GetCss() {
-  return ResourceBundle::GetSharedInstance()
-      .GetRawDataResource(IDR_DISTILLER_CSS)
-      .as_string();
+const std::string GetCss(ReaderModePrefs* reader_mode_prefs) {
+  std::vector<std::string> substitutions;
+  substitutions.push_back(GetBodyInsertionText(reader_mode_prefs));
+  base::StringPiece css_template =
+      ResourceBundle::GetSharedInstance().GetRawDataResource(
+          IDR_DISTILLER_CSS);
+  return ReplaceStringPlaceholders(css_template, substitutions, NULL);
 }
 
 const std::string GetJavaScript() {