Adds a new command line switch called new-new-tab-page which enables

the prototype new new tab page.

Split the DownloadsDOMHandler into its own file.

The prototype is rough and has bugs. Don't file any bugs on it!

TEST=Run with the command line above and you should see an alternative
new tab page.

Review URL: http://codereview.chromium.org/115426

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16351 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 334 insertions, 0 deletions

diff --git a/chrome/browser/dom_ui/downloads_dom_handler.cc b/chrome/browser/dom_ui/downloads_dom_handler.cc
new file mode 100644
index 0000000..ea56c07
--- /dev/null
+++ b/chrome/browser/dom_ui/downloads_dom_handler.cc
@@ -0,0 +1,334 @@
+// Copyright (c) 2006-2009 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/dom_ui/downloads_dom_handler.h"
+
+#include "app/l10n_util.h"
+#include "base/gfx/png_encoder.h"
+#include "base/string_piece.h"
+#include "base/thread.h"
+#include "base/time_format.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/dom_ui/chrome_url_data_manager.h"
+#include "chrome/browser/dom_ui/fileicon_source.h"
+#if defined(OS_WIN)
+// TODO(port): re-enable when download_util is ported
+#include "chrome/browser/download/download_util.h"
+#endif
+#include "chrome/browser/metrics/user_metrics.h"
+#include "chrome/browser/profile.h"
+#include "chrome/common/jstemplate_builder.h"
+#include "chrome/common/time_format.h"
+#include "chrome/common/url_constants.h"
+#include "grit/browser_resources.h"
+#include "grit/generated_resources.h"
+
+namespace {
+
+// Maximum number of downloads to show. TODO(glen): Remove this and instead
+// stuff the downloads down the pipe slowly.
+static const int kMaxDownloads = 150;
+
+// Sort DownloadItems into descending order by their start time.
+class DownloadItemSorter : public std::binary_function<DownloadItem*,
+                                                       DownloadItem*,
+                                                       bool> {
+ public:
+  bool operator()(const DownloadItem* lhs, const DownloadItem* rhs) {
+    return lhs->start_time() > rhs->start_time();
+  }
+};
+
+} // namespace
+
+DownloadsDOMHandler::DownloadsDOMHandler(DOMUI* dom_ui, DownloadManager* dlm)
+    : DOMMessageHandler(dom_ui),
+      search_text_(),
+      download_manager_(dlm) {
+  dom_ui_->RegisterMessageCallback("getDownloads",
+      NewCallback(this, &DownloadsDOMHandler::HandleGetDownloads));
+  dom_ui_->RegisterMessageCallback("openFile",
+      NewCallback(this, &DownloadsDOMHandler::HandleOpenFile));
+
+  dom_ui_->RegisterMessageCallback("drag",
+      NewCallback(this, &DownloadsDOMHandler::HandleDrag));
+
+  dom_ui_->RegisterMessageCallback("saveDangerous",
+      NewCallback(this, &DownloadsDOMHandler::HandleSaveDangerous));
+  dom_ui_->RegisterMessageCallback("discardDangerous",
+      NewCallback(this, &DownloadsDOMHandler::HandleDiscardDangerous));
+  dom_ui_->RegisterMessageCallback("show",
+      NewCallback(this, &DownloadsDOMHandler::HandleShow));
+  dom_ui_->RegisterMessageCallback("togglepause",
+      NewCallback(this, &DownloadsDOMHandler::HandlePause));
+  dom_ui_->RegisterMessageCallback("resume",
+      NewCallback(this, &DownloadsDOMHandler::HandlePause));
+  dom_ui_->RegisterMessageCallback("cancel",
+      NewCallback(this, &DownloadsDOMHandler::HandleCancel));
+  dom_ui_->RegisterMessageCallback("clearAll",
+      NewCallback(this, &DownloadsDOMHandler::HandleClearAll));
+
+
+  // Create our fileicon data source.
+  g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+      NewRunnableMethod(&chrome_url_data_manager,
+                        &ChromeURLDataManager::AddDataSource,
+                        new FileIconSource()));
+}
+
+DownloadsDOMHandler::~DownloadsDOMHandler() {
+  ClearDownloadItems();
+  download_manager_->RemoveObserver(this);
+}
+
+// DownloadsDOMHandler, public: -----------------------------------------------
+
+void DownloadsDOMHandler::Init() {
+  download_manager_->AddObserver(this);
+}
+
+void DownloadsDOMHandler::OnDownloadUpdated(DownloadItem* download) {
+  // Get the id for the download. Our downloads are sorted latest to first,
+  // and the id is the index into that list. We should be careful of sync
+  // errors between the UI and the download_items_ list (we may wish to use
+  // something other than 'id').
+  OrderedDownloads::iterator it = find(download_items_.begin(),
+                                       download_items_.end(),
+                                       download);
+  if (it == download_items_.end())
+    return;
+  const int id = static_cast<int>(it - download_items_.begin());
+
+  ListValue results_value;
+  results_value.Append(CreateDownloadItemValue(download, id));
+  dom_ui_->CallJavascriptFunction(L"downloadUpdated", results_value);
+}
+
+// A download has started or been deleted. Query our DownloadManager for the
+// current set of downloads, which will call us back in SetDownloads once it
+// has retrieved them.
+void DownloadsDOMHandler::ModelChanged() {
+  ClearDownloadItems();
+  download_manager_->GetDownloads(this, search_text_);
+}
+
+void DownloadsDOMHandler::SetDownloads(
+    std::vector<DownloadItem*>& downloads) {
+  ClearDownloadItems();
+
+  // Swap new downloads in.
+  download_items_.swap(downloads);
+  sort(download_items_.begin(), download_items_.end(), DownloadItemSorter());
+
+  // Scan for any in progress downloads and add ourself to them as an observer.
+  for (OrderedDownloads::iterator it = download_items_.begin();
+       it != download_items_.end(); ++it) {
+    if (static_cast<int>(it - download_items_.begin()) > kMaxDownloads)
+      break;
+
+    DownloadItem* download = *it;
+    if (download->state() == DownloadItem::IN_PROGRESS) {
+      // We want to know what happens as the download progresses.
+      download->AddObserver(this);
+    } else if (download->safety_state() == DownloadItem::DANGEROUS) {
+      // We need to be notified when the user validates the dangerous download.
+      download->AddObserver(this);
+    }
+  }
+
+  SendCurrentDownloads();
+}
+
+void DownloadsDOMHandler::HandleGetDownloads(const Value* value) {
+  std::wstring new_search = ExtractStringValue(value);
+  if (search_text_.compare(new_search) != 0) {
+    search_text_ = new_search;
+    ClearDownloadItems();
+    download_manager_->GetDownloads(this, search_text_);
+  } else {
+    SendCurrentDownloads();
+  }
+}
+
+void DownloadsDOMHandler::HandleOpenFile(const Value* value) {
+  DownloadItem* file = GetDownloadByValue(value);
+  if (file)
+    download_manager_->OpenDownload(file, NULL);
+}
+
+void DownloadsDOMHandler::HandleDrag(const Value* value) {
+  DownloadItem* file = GetDownloadByValue(value);
+  if (file) {
+    IconManager* im = g_browser_process->icon_manager();
+    SkBitmap* icon = im->LookupIcon(file->full_path(), IconLoader::NORMAL);
+    download_util::DragDownload(file, icon);
+  }
+}
+
+void DownloadsDOMHandler::HandleSaveDangerous(const Value* value) {
+  DownloadItem* file = GetDownloadByValue(value);
+  if (file)
+    download_manager_->DangerousDownloadValidated(file);
+}
+
+void DownloadsDOMHandler::HandleDiscardDangerous(const Value* value) {
+  DownloadItem* file = GetDownloadByValue(value);
+  if (file)
+    file->Remove(true);
+}
+
+void DownloadsDOMHandler::HandleShow(const Value* value) {
+  DownloadItem* file = GetDownloadByValue(value);
+  if (file)
+      download_manager_->ShowDownloadInShell(file);
+}
+
+void DownloadsDOMHandler::HandlePause(const Value* value) {
+  DownloadItem* file = GetDownloadByValue(value);
+  if (file)
+    file->TogglePause();
+}
+
+void DownloadsDOMHandler::HandleCancel(const Value* value) {
+  DownloadItem* file = GetDownloadByValue(value);
+  if (file)
+    file->Cancel(true);
+}
+
+void DownloadsDOMHandler::HandleClearAll(const Value* value) {
+  download_manager_->RemoveAllDownloads();
+}
+
+// DownloadsDOMHandler, private: ----------------------------------------------
+
+void DownloadsDOMHandler::SendCurrentDownloads() {
+  ListValue results_value;
+  for (OrderedDownloads::iterator it = download_items_.begin();
+      it != download_items_.end(); ++it) {
+    int index = static_cast<int>(it - download_items_.begin());
+    if (index > kMaxDownloads)
+      break;
+    results_value.Append(CreateDownloadItemValue(*it,index));
+  }
+
+  dom_ui_->CallJavascriptFunction(L"downloadsList", results_value);
+}
+
+DictionaryValue* DownloadsDOMHandler::CreateDownloadItemValue(
+    DownloadItem* download, int id) {
+  DictionaryValue* file_value = new DictionaryValue();
+
+  file_value->SetInteger(L"started",
+    static_cast<int>(download->start_time().ToTimeT()));
+  file_value->SetString(L"since_string",
+    TimeFormat::RelativeDate(download->start_time(), NULL));
+  file_value->SetString(L"date_string",
+    base::TimeFormatShortDate(download->start_time()));
+  file_value->SetInteger(L"id", id);
+  file_value->SetString(L"file_path", download->full_path().ToWStringHack());
+  file_value->SetString(L"file_name", download->GetFileName().ToWStringHack());
+  file_value->SetString(L"url", download->url().spec());
+
+  if (download->state() == DownloadItem::IN_PROGRESS) {
+    if (download->safety_state() == DownloadItem::DANGEROUS) {
+      file_value->SetString(L"state", L"DANGEROUS");
+    } else if (download->is_paused()) {
+      file_value->SetString(L"state", L"PAUSED");
+    } else {
+      file_value->SetString(L"state", L"IN_PROGRESS");
+    }
+
+    file_value->SetString(L"progress_status_text",
+       GetProgressStatusText(download));
+
+    file_value->SetInteger(L"percent",
+        static_cast<int>(download->PercentComplete()));
+    file_value->SetInteger(L"received",
+        static_cast<int>(download->received_bytes()));
+  } else if (download->state() == DownloadItem::CANCELLED) {
+    file_value->SetString(L"state", L"CANCELLED");
+  } else if (download->state() == DownloadItem::COMPLETE) {
+    if (download->safety_state() == DownloadItem::DANGEROUS) {
+      file_value->SetString(L"state", L"DANGEROUS");
+    } else {
+      file_value->SetString(L"state", L"COMPLETE");
+    }
+  }
+
+  file_value->SetInteger(L"total",
+      static_cast<int>(download->total_bytes()));
+
+  return file_value;
+}
+
+void DownloadsDOMHandler::ClearDownloadItems() {
+  // Clear out old state and remove self as observer for each download.
+  for (OrderedDownloads::iterator it = download_items_.begin();
+      it != download_items_.end(); ++it) {
+    (*it)->RemoveObserver(this);
+  }
+  download_items_.clear();
+}
+
+DownloadItem* DownloadsDOMHandler::GetDownloadById(int id) {
+  for (OrderedDownloads::iterator it = download_items_.begin();
+      it != download_items_.end(); ++it) {
+    if (static_cast<int>(it - download_items_.begin() == id)) {
+      return (*it);
+    }
+  }
+
+  return NULL;
+}
+
+DownloadItem* DownloadsDOMHandler::GetDownloadByValue(const Value* value) {
+  int id;
+  if (ExtractIntegerValue(value, &id)) {
+    return GetDownloadById(id);
+  }
+  return NULL;
+}
+
+std::wstring DownloadsDOMHandler::GetProgressStatusText(
+    DownloadItem* download) {
+  int64 total = download->total_bytes();
+  int64 size = download->received_bytes();
+  DataUnits amount_units = GetByteDisplayUnits(size);
+  std::wstring received_size = FormatBytes(size, amount_units, true);
+  std::wstring amount = received_size;
+
+  // Adjust both strings for the locale direction since we don't yet know which
+  // string we'll end up using for constructing the final progress string.
+  std::wstring amount_localized;
+  if (l10n_util::AdjustStringForLocaleDirection(amount, &amount_localized)) {
+    amount.assign(amount_localized);
+    received_size.assign(amount_localized);
+  }
+
+  if (total) {
+    amount_units = GetByteDisplayUnits(total);
+    std::wstring total_text = FormatBytes(total, amount_units, true);
+    std::wstring total_text_localized;
+    if (l10n_util::AdjustStringForLocaleDirection(total_text,
+                                                  &total_text_localized))
+      total_text.assign(total_text_localized);
+
+    amount = l10n_util::GetStringF(IDS_DOWNLOAD_TAB_PROGRESS_SIZE,
+                                   received_size,
+                                   total_text);
+  } else {
+    amount.assign(received_size);
+  }
+  amount_units = GetByteDisplayUnits(download->CurrentSpeed());
+  std::wstring speed_text = FormatSpeed(download->CurrentSpeed(),
+                                        amount_units, true);
+  std::wstring speed_text_localized;
+  if (l10n_util::AdjustStringForLocaleDirection(speed_text,
+                                                &speed_text_localized))
+    speed_text.assign(speed_text_localized);
+
+  return l10n_util::GetStringF(IDS_DOWNLOAD_TAB_PROGRESS_SPEED,
+                               speed_text,
+                               amount);
+}