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Unified Diff: chrome/browser/ui/webui/ntp/thumbnail_list_source.cc

Issue 24632002: Implementing chrome://thumbnails page to view URLs in TopSites and cached thumbnails. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Trying to fix Linux compile by reordering initializing order of weak_ptr_factory_. Created 7 years, 3 months ago
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Index: chrome/browser/ui/webui/ntp/thumbnail_list_source.cc
diff --git a/chrome/browser/ui/webui/ntp/thumbnail_list_source.cc b/chrome/browser/ui/webui/ntp/thumbnail_list_source.cc
new file mode 100644
index 0000000000000000000000000000000000000000..482ab0e0f081af0460f62fc28c077b6ae1f7a1b3
--- /dev/null
+++ b/chrome/browser/ui/webui/ntp/thumbnail_list_source.cc
@@ -0,0 +1,148 @@
+// Copyright (c) 2013 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/webui/ntp/thumbnail_list_source.h"
+
+#include <string>
+
+#include "base/base64.h"
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/memory/ref_counted_memory.h"
+#include "base/strings/string_util.h"
+#include "chrome/browser/history/top_sites.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/search/instant_io_context.h"
+#include "chrome/browser/thumbnails/thumbnail_service.h"
+#include "chrome/browser/thumbnails/thumbnail_service_factory.h"
+#include "chrome/common/url_constants.h"
+#include "net/base/escape.h"
+#include "net/url_request/url_request.h"
+
+namespace {
+
+const char* html_header =
+ "<!DOCTYPE HTML>\n<html>\n<head>\n<title>TopSites Thumbnails</title>\n"
+ "<meta charset=\"utf-8\">\n"
+ "<style type=\"text/css\">\nimg.thumb {border: 1px solid black;}\n"
+ "li {white-space: nowrap;}\n</style>\n";
+const char* html_body = "</head>\n<body>\n";
+const char* html_footer = "</body>\n</html>\n";
+
+// If |want_thumbnails| == true, then renders elements in |mvurl_list| that have
+// thumbnails, with their thumbnails. Otherwise renders elements in |mvurl_list|
+// that have no thumbnails.
+void RenderMostVisitedURLList(
+ const history::MostVisitedURLList& mvurl_list,
+ const std::vector<std::string>& base64_encoded_pngs,
+ bool want_thumbnails,
+ std::vector<std::string>* out) {
+ DCHECK_EQ(mvurl_list.size(), base64_encoded_pngs.size());
+ out->push_back("<div><ul>\n");
+ for (size_t i = 0; i < mvurl_list.size(); ++i) {
+ const history::MostVisitedURL& mvurl = mvurl_list[i];
+ bool has_thumbnail = !base64_encoded_pngs[i].empty();
+ if (has_thumbnail == want_thumbnails) {
+ out->push_back("<li>\n");
+ out->push_back(net::EscapeForHTML(mvurl.url.spec()) + "\n");
+ if (want_thumbnails) {
+ out->push_back("<div><img class=\"thumb\" "
+ "src=\"data:image/png;base64," +
+ base64_encoded_pngs[i] + "\"/></div>\n");
+ }
+ if (!mvurl.redirects.empty()) {
+ out->push_back("<ul>\n");
+ history::RedirectList::const_iterator jt;
+ for (jt = mvurl.redirects.begin();
+ jt != mvurl.redirects.end(); ++jt) {
+ out->push_back("<li>" + net::EscapeForHTML(jt->spec()) + "</li>\n");
+ }
+ out->push_back("</ul>\n");
+ }
+ out->push_back("</li>\n");
+ }
+ }
+ out->push_back("</ul></div>\n");
+}
+
+} // namespace
+
+ThumbnailListSource::ThumbnailListSource(Profile* profile)
+ : thumbnail_service_(ThumbnailServiceFactory::GetForProfile(profile)),
+ profile_(profile),
+ weak_ptr_factory_(this) {
+}
+
+ThumbnailListSource::~ThumbnailListSource() {
+}
+
+std::string ThumbnailListSource::GetSource() const {
+ return chrome::kChromeUIThumbnailListHost;
+}
+
+void ThumbnailListSource::StartDataRequest(
+ const std::string& path,
+ int render_process_id,
+ int render_view_id,
+ const content::URLDataSource::GotDataCallback& callback) {
+ profile_->GetTopSites()->GetMostVisitedURLs(
+ base::Bind(&ThumbnailListSource::OnMostVisitedURLsAvailable,
+ weak_ptr_factory_.GetWeakPtr(),
+ callback));
+}
+
+std::string ThumbnailListSource::GetMimeType(const std::string& path) const {
+ return "text/html";
+}
+
+base::MessageLoop* ThumbnailListSource::MessageLoopForRequestPath(
+ const std::string& path) const {
+ // TopSites can be accessed from the IO thread.
+ return thumbnail_service_.get() ?
+ NULL : content::URLDataSource::MessageLoopForRequestPath(path);
+}
+
+bool ThumbnailListSource::ShouldServiceRequest(
+ const net::URLRequest* request) const {
+ if (request->url().SchemeIs(chrome::kChromeSearchScheme))
+ return InstantIOContext::ShouldServiceRequest(request);
+ return URLDataSource::ShouldServiceRequest(request);
+}
+
+void ThumbnailListSource::OnMostVisitedURLsAvailable(
+ const content::URLDataSource::GotDataCallback& callback,
+ const history::MostVisitedURLList& mvurl_list) {
+ const size_t num_mv = mvurl_list.size();
+ size_t num_mv_with_thumb = 0;
+
+ // Encode all available thumbnails and store into |base64_encoded_pngs|.
+ std::vector<std::string> base64_encoded_pngs(num_mv);
+ for (size_t i = 0; i < num_mv; ++i) {
+ scoped_refptr<base::RefCountedMemory> data;
+ if (thumbnail_service_->GetPageThumbnail(mvurl_list[i].url, false, &data)) {
+ std::string data_str;
+ data_str.assign(reinterpret_cast<const char*>(data->front()),
+ data->size());
+ base::Base64Encode(data_str, &base64_encoded_pngs[i]);
+ ++num_mv_with_thumb;
+ }
+ }
+
+ // Render HTML to embed URLs and thumbnails.
+ std::vector<std::string> out;
+ out.push_back(html_header);
+ out.push_back(html_body);
+ if (num_mv_with_thumb > 0) {
+ out.push_back("<h2>TopSites URLs with Thumbnails</h2>\n");
+ RenderMostVisitedURLList(mvurl_list, base64_encoded_pngs, true, &out);
+ }
+ if (num_mv_with_thumb < num_mv) {
+ out.push_back("<h2>TopSites URLs without Thumbnails</h2>\n");
+ RenderMostVisitedURLList(mvurl_list, base64_encoded_pngs, false, &out);
+ }
+ out.push_back(html_footer);
+
+ std::string out_html = JoinString(out, "");
+ callback.Run(base::RefCountedString::TakeString(&out_html));
+}
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