alternate ntp: implement searchbox api for instant overlay to adopt themes

chrome/renderer/searchbox/searchbox.cc

 // Copyright (c) 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 "chrome/common/render_messages.h"
 #include "chrome/renderer/searchbox/searchbox_extension.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 
 SearchBox::SearchBox(content::RenderView* render_view)
     : content::RenderViewObserver(render_view),
       content::RenderViewObserverTracker<SearchBox>(render_view),
       verbatim_(false),
       selection_start_(0),
       selection_end_(0),
       results_base_(0),
       last_results_base_(0),
-      active_tab_is_ntp_(false) {
+      active_tab_is_ntp_(false),
+      theme_area_height_(0) {
 }
 
 SearchBox::~SearchBox() {
 }
 
 void SearchBox::SetSuggestions(
     const std::vector<InstantSuggestion>& suggestions) {
   if (!suggestions.empty() &&
       suggestions[0].behavior == INSTANT_COMPLETE_REPLACE) {
     query_ = suggestions[0].text;
@@ skipping 40 matching lines @@
 }
 
 const InstantAutocompleteResult* SearchBox::GetAutocompleteResultWithId(
     size_t restricted_id) const {
   if (restricted_id < last_results_base_ ||
       restricted_id >= last_results_base_ + last_autocomplete_results_.size())
     return NULL;
   return &last_autocomplete_results_[restricted_id - last_results_base_];
 }
 
+const ThemeBackgroundInfo& SearchBox::GetThemeBackgroundInfo() {
+  return theme_info_;
+}
+
+int SearchBox::GetThemeAreaHeight() {
+  return theme_area_height_;
+}
+
 bool SearchBox::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(SearchBox, message)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxChange, OnChange)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxSubmit, OnSubmit)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxCancel, OnCancel)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxResize, OnResize)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_DetermineIfPageSupportsInstant,
                         OnDetermineIfPageSupportsInstant)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxAutocompleteResults,
                         OnAutocompleteResults)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxUpOrDownKeyPressed,
                         OnUpOrDownKeyPressed)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxActiveTabModeChanged,
                         OnActiveTabModeChanged)
+    IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxThemeChanged,
+                        OnThemeChanged)
+    IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxThemeAreaHeightChanged,
+                        OnThemeAreaHeightChanged)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void SearchBox::OnChange(const string16& query,
                          bool verbatim,
                          size_t selection_start,
                          size_t selection_end) {
   query_ = query;
@@ skipping 63 matching lines @@
 }
 
 void SearchBox::OnActiveTabModeChanged(bool active_tab_is_ntp) {
   active_tab_is_ntp_ = active_tab_is_ntp;
   if (render_view()->GetWebView() && render_view()->GetWebView()->mainFrame()) {
     extensions_v8::SearchBoxExtension::DispatchContextChange(
         render_view()->GetWebView()->mainFrame());
   }
 }
 
+void SearchBox::OnThemeChanged(const ThemeBackgroundInfo& theme_info) {
+  theme_info_ = theme_info;
+  if (render_view()->GetWebView() && render_view()->GetWebView()->mainFrame()) {
+    extensions_v8::SearchBoxExtension::DispatchThemeChange(
+        render_view()->GetWebView()->mainFrame());
+  }
+}
+
+void SearchBox::OnThemeAreaHeightChanged(int height) {
+  theme_area_height_ = height;
+  if (render_view()->GetWebView() && render_view()->GetWebView()->mainFrame()) {
+    extensions_v8::SearchBoxExtension::DispatchThemeAreaHeightChange(
+        render_view()->GetWebView()->mainFrame());
+  }
+}
+
 void SearchBox::Reset() {
   query_.clear();
   verbatim_ = false;
   selection_start_ = 0;
   selection_end_ = 0;
   results_base_ = 0;
   rect_ = gfx::Rect();
   autocomplete_results_.clear();
   active_tab_is_ntp_ = false;
+  theme_info_ = ThemeBackgroundInfo();
+  theme_area_height_ = 0;
 }