Fixing iframe jank in the local omnibox popup.

chrome/renderer/searchbox/searchbox.cc

 // Copyright 2012 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/renderer/searchbox/searchbox.h"
 
-#include "base/metrics/field_trial.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/omnibox_focus_state.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/renderer/searchbox/searchbox_extension.h"
 #include "content/public/renderer/render_view.h"
 #include "grit/renderer_resources.h"
 #include "net/base/escape.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace {
 
 // Size of the results cache.
 const size_t kMaxInstantAutocompleteResultItemCacheSize = 100;
 
-// The HTML returned when an invalid or unknown restricted ID is requested.
-const char kInvalidSuggestionHtml[] =
-    "<div style=\"background:red\">invalid rid %d</div>";
-
-// Checks if the input color is in valid range.
-bool IsColorValid(int color) {
-  return color >= 0 && color <= 0xffffff;
-}
-
-// If |url| starts with |prefix|, removes |prefix|.
-void StripPrefix(string16* url, const string16& prefix) {
-  if (StartsWith(*url, prefix, true))
-    url->erase(0, prefix.length());
-}
-
-// Removes leading "http://" or "http://www." from |url| unless |userInput|
-// starts with those prefixes.
-void StripURLPrefixes(string16* url, const string16& userInput) {
-  string16 trimmedUserInput;
-  TrimWhitespace(userInput, TRIM_TRAILING, &trimmedUserInput);
-  if (StartsWith(*url, trimmedUserInput, true))
-    return;
-
-  StripPrefix(url, ASCIIToUTF16(chrome::kHttpScheme) + ASCIIToUTF16("://"));
-
-  if (StartsWith(*url, trimmedUserInput, true))
-    return;
-
-  StripPrefix(url, ASCIIToUTF16("www."));
-}
-
 }  // namespace
 
 SearchBox::SearchBox(content::RenderView* render_view)
     : content::RenderViewObserver(render_view),
       content::RenderViewObserverTracker<SearchBox>(render_view),
       verbatim_(false),
       selection_start_(0),
       selection_end_(0),
       start_margin_(0),
       is_key_capture_enabled_(false),
@@ skipping 336 matching lines @@
     std::vector<InstantMostVisitedItemIDPair>* items) const {
   return most_visited_items_cache_.GetCurrentItems(items);
 }
 
 bool SearchBox::GetMostVisitedItemWithID(
     InstantRestrictedID most_visited_item_id,
     InstantMostVisitedItem* item) const {
   return most_visited_items_cache_.GetItemWithRestrictedID(most_visited_item_id,
                                                            item);
 }
-
-bool SearchBox::GenerateDataURLForSuggestionRequest(const GURL& request_url,
-                                                    GURL* data_url) const {
-  DCHECK(data_url);
-
-  if (!ShouldUseIframes())
-    return false;
-
-  // The origin URL is required so that the iframe knows what origin to post
-  // messages to.
-  WebKit::WebView* webview = render_view()->GetWebView();
-  if (!webview)
-    return false;
-  GURL embedder_url(webview->mainFrame()->document().url());
-  GURL embedder_origin = embedder_url.GetOrigin();
-  if (!embedder_origin.is_valid())
-    return false;
-
-  DCHECK(StartsWithASCII(request_url.path(), "/", true));
-  std::string restricted_id_str = request_url.path().substr(1);
-
-  InstantRestrictedID restricted_id = 0;
-  DCHECK_EQ(sizeof(InstantRestrictedID), sizeof(int));
-  if (!base::StringToInt(restricted_id_str, &restricted_id))
-    return false;
-
-  std::string response_html;
-  InstantAutocompleteResult result;
-  if (autocomplete_results_cache_.GetItemWithRestrictedID(
-          restricted_id, &result)) {
-    std::string template_html =
-        ResourceBundle::GetSharedInstance().GetRawDataResource(
-            IDR_OMNIBOX_RESULT).as_string();
-
-    DCHECK(IsColorValid(autocomplete_results_style_.url_color));
-    DCHECK(IsColorValid(autocomplete_results_style_.title_color));
-
-    string16 contents;
-    if (result.search_query.empty()) {
-      contents = result.destination_url;
-      FormatURLForDisplay(&contents);
-    } else {
-      contents = result.search_query;
-    }
-
-    // First, HTML-encode the text so that '&', '<' and such lose their special
-    // meaning. Next, URL-encode the text because it will be inserted into
-    // "data:" URIs; thus '%' and such lose their special meaning.
-    std::string encoded_contents = net::EscapeQueryParamValue(
-        net::EscapeForHTML(UTF16ToUTF8(contents)), false);
-    std::string encoded_description = net::EscapeQueryParamValue(
-        net::EscapeForHTML(UTF16ToUTF8(result.description)), false);
-
-    response_html = base::StringPrintf(
-        template_html.c_str(),
-        embedder_origin.spec().c_str(),
-        UTF16ToUTF8(omnibox_font_).c_str(),
-        omnibox_font_size_,
-        autocomplete_results_style_.url_color,
-        autocomplete_results_style_.title_color,
-        encoded_contents.c_str(),
-        encoded_description.c_str());
-  } else {
-    response_html = base::StringPrintf(kInvalidSuggestionHtml, restricted_id);
-  }
-
-  *data_url = GURL("data:text/html;charset=utf-8," + response_html);
-  return true;
-}
-
-void SearchBox::SetInstantAutocompleteResultStyle(
-    const InstantAutocompleteResultStyle& style) {
-  if (IsColorValid(style.url_color) && IsColorValid(style.title_color))
-    autocomplete_results_style_ = style;
-}
-
-void SearchBox::FormatURLForDisplay(string16* url) const {
-  StripURLPrefixes(url, query());
-
-  string16 trimmedUserInput;
-  TrimWhitespace(query(), TRIM_LEADING, &trimmedUserInput);
-  if (EndsWith(*url, trimmedUserInput, true))
-    return;
-
-  // Strip a lone trailing slash.
-  if (EndsWith(*url, ASCIIToUTF16("/"), true))
-    url->erase(url->length() - 1, 1);
-}
-
-// static
-bool SearchBox::ShouldUseIframes() {
-  // TODO(shishir): All the code below is just temporary and needs to be removed
-  // once support for ShadowDom is removed.
-
-  // The following is hacky. But given the short lifespan of this code
-  // and the amount of code that would need to be moved/copied for this change,
-  // it's probably worth it.
-  static const char kInstantExtendedFieldTrialName[] = "InstantExtended";
-  static const char kIframesEnabledFlagWithValue[] = "iframe:1";
-  std::string trial_flags =
-      base::FieldTrialList::FindFullName(kInstantExtendedFieldTrialName);
-  std::vector<std::string> flags;
-  Tokenize(trial_flags, " ", &flags);
-  for (size_t i = 0; i < flags.size(); ++i) {
-    if (flags[i] == kIframesEnabledFlagWithValue)
-      return true;
-  }
-  return false;
-}