Add a "Simplify Page" option to the print preview dialog

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 e19f3785f71b92c2243e8c07be8ea3b0429ace9f..8bc49587218a65d713983c8322f4ee42b1e9bfc2 100644
--- a/components/dom_distiller/core/viewer.cc
+++ b/components/dom_distiller/core/viewer.cc
@@ -143,6 +143,26 @@ std::string ReplaceHtmlTemplateValues(
   return ReplaceStringPlaceholders(html_template, substitutions, NULL);
 }
 
+std::string ReplacePrintPreviewHtmlTemplateValues(
+    const std::string& title,
+    const std::string& textDirection,
+    const std::string& content,
+    const DistilledPagePrefs::Theme theme,
+    const DistilledPagePrefs::FontFamily font_family) {
+  base::StringPiece html_template =
+      ResourceBundle::GetSharedInstance().GetRawDataResource(
+          IDR_DOM_DISTILLER_PRINT_PREVIEW_HTML);
+
+  std::vector<std::string> substitutions;
+  substitutions.push_back(title);                                         // $1
+  substitutions.push_back(kPrintPreviewViewerCssPath);                    // $2
+  substitutions.push_back(GetThemeCssClass(theme) + " " +
+                          GetFontCssClass(font_family));                  // $3
+  substitutions.push_back(content);                                       // $4
+  substitutions.push_back(textDirection);                                 // $9
+  return ReplaceStringPlaceholders(html_template, substitutions, NULL);
+}
+
 }  // namespace
 
 namespace viewer {
@@ -242,11 +262,48 @@ const std::string GetErrorPageHtml(
                                    font_family);
 }
 
+const std::string GetUnsafePrintPreviewHtml(
+    const DistilledArticleProto* article_proto,
+    const DistilledPagePrefs::Theme theme,
+    const DistilledPagePrefs::FontFamily font_family) {
+  DCHECK(article_proto);
+  std::string title;
+  std::string unsafe_article_html;
+  std::string text_direction = "";
+  if (article_proto->has_title() && article_proto->pages_size() > 0 &&
+      article_proto->pages(0).has_html()) {
+    title = net::EscapeForHTML(article_proto->title());
+    std::ostringstream unsafe_output_stream;
+    for (int page_num = 0; page_num < article_proto->pages_size(); ++page_num) {
+      unsafe_output_stream << article_proto->pages(page_num).html();
+    }
+    unsafe_article_html = unsafe_output_stream.str();
+    text_direction = article_proto->pages(0).text_direction();
+  }
+
+  EnsureNonEmptyTitle(&title);
+  EnsureNonEmptyContent(&unsafe_article_html);
+
+  std::string original_url;
+  if (article_proto->pages_size() > 0 && article_proto->pages(0).has_url()) {
+    original_url = article_proto->pages(0).url();
+  }
+
+  return ReplacePrintPreviewHtmlTemplateValues(
+      title, text_direction, unsafe_article_html,
+      theme, font_family);
+}
+
 const std::string GetCss() {
   return ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_DISTILLER_CSS).as_string();
 }
 
+const std::string GetPrintPreviewCss() {
+  return ResourceBundle::GetSharedInstance().GetRawDataResource(
+          IDR_DISTILLER_PRINT_PREVIEW_CSS).as_string();
+}
+
 const std::string GetJavaScript() {
   return ResourceBundle::GetSharedInstance()
       .GetRawDataResource(IDR_DOM_DISTILLER_VIEWER_JS)