[AppList] Add a Suggestions Provider to applist.

chrome/browser/ui/app_list/search/suggestions/suggestions_result.cc

+// Copyright 2014 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/ui/app_list/search/suggestions/suggestions_result.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/app_list/search/search_util.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/base/page_transition_types.h"
+#include "ui/gfx/image/image_skia.h"
+#include "url/gurl.h"
+
+namespace app_list {
+
+SuggestionsResult::SuggestionsResult(
+    Profile* profile,
+    AppListControllerDelegate* list_controller,
+    suggestions::SuggestionsService* suggestions_service,
+    const suggestions::ChromeSuggestion suggestion,
+    int index)
+  : profile_(profile),
+    list_controller_(list_controller),
+    suggestions_service_(suggestions_service),
+    suggestion_(suggestion),
+    index_(index),
+    weak_ptr_factory_(this) {
+  set_id(suggestion_.url());
+  set_title(base::UTF8ToUTF16(suggestion_.title()));
+  set_display_type(DISPLAY_TILE);
+
+  // The index of the suggestion is an indication of its relevance.
+  if (index_)
+    set_relevance(1.0 / index_);
+
+  UpdateIcon();
+}
+
+SuggestionsResult::~SuggestionsResult() {}
+
+void SuggestionsResult::Open(int event_flags) {
+  RecordHistogram(SUGGESTIONS_SEARCH_RESULT);
+  list_controller_->OpenURL(profile_,
+                            GURL(suggestion_.url()),
+                            ui::PageTransition::PAGE_TRANSITION_LINK,
+                            ui::DispositionFromEventFlags(event_flags));
+}
+
+scoped_ptr<SearchResult> SuggestionsResult::Duplicate() {
+  return scoped_ptr<SearchResult>(new SuggestionsResult(
+      profile_, list_controller_, suggestions_service_, suggestion_, index_));
+}
+
+void SuggestionsResult::UpdateIcon() {
+  if (suggestions_service_) {
+    suggestions_service_->GetPageThumbnail(
+        GURL(suggestion_.url()),
+        base::Bind(&SuggestionsResult::OnSuggestionsThumbnailAvailable,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+}
+
+void SuggestionsResult::OnSuggestionsThumbnailAvailable(
+    const GURL& url,
+    const SkBitmap* bitmap) {
+  if (bitmap) {
+    SetIcon(gfx::ImageSkia::CreateFrom1xBitmap(*bitmap));
+  } else {
+    // There is no image for this suggestion. Disable being shown on the start
+    // screen.
+    set_display_type(DISPLAY_LIST);
+  }
+}
+
+}  // namespace app_list