Add download item tooltips on linux/win.

chrome/browser/gtk/download_item_gtk.cc

 // Copyright (c) 2010 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/gtk/download_item_gtk.h"
 
 #include "app/gtk_util.h"
 #include "app/l10n_util.h"
 #include "app/menus/simple_menu_model.h"
 #include "app/resource_bundle.h"
@@ skipping 31 matching lines @@
 // bitmap that we use to draw it, i.e. 16, but can be more.
 const int kMenuButtonWidth = 16;
 
 // Padding on left and right of items in dangerous download prompt.
 const int kDangerousElementPadding = 3;
 
 // Amount of space we allot to showing the filename. If the filename is too wide
 // it will be elided.
 const int kTextWidth = 140;
 
+// We only cap the size of the tooltip so we don't crash.
+const int kTooltipMaxWidth = 1000;
+
 // The minimum width we will ever draw the download item. Used as a lower bound
 // during animation. This number comes from the width of the images used to
 // make the download item.
 const int kMinDownloadItemWidth = download_util::kSmallProgressIconSize;
 
 // New download item animation speed in milliseconds.
 const int kNewItemAnimationDurationMs = 800;
 
 // How long the 'download complete' animation should last for.
 const int kCompleteAnimationDurationMs = 2500;
@@ skipping 84 matching lines @@
       progress_angle_(download_util::kStartAngleDegrees),
       download_model_(download_model),
       dangerous_prompt_(NULL),
       dangerous_label_(NULL),
       icon_(NULL),
       creation_time_(base::Time::Now()) {
   LoadIcon();
 
   body_.Own(gtk_button_new());
   gtk_widget_set_app_paintable(body_.get(), TRUE);
+  UpdateTooltip();
 
   g_signal_connect(body_.get(), "expose-event",
                    G_CALLBACK(OnExpose), this);
   g_signal_connect(body_.get(), "clicked",
                    G_CALLBACK(OnClick), this);
   GTK_WIDGET_UNSET_FLAGS(body_.get(), GTK_CAN_FOCUS);
   // Remove internal padding on the button.
   GtkRcStyle* no_padding_style = gtk_rc_style_new();
   no_padding_style->xthickness = 0;
   no_padding_style->ythickness = 0;
@@ skipping 159 matching lines @@
 
     // We may free some shelf space for showing more download items.
     parent_shelf_->MaybeShowMoreDownloadItems();
   }
 
   if (download->full_path() != icon_filepath_) {
     // Turns out the file path is "unconfirmed %d.download" for dangerous
     // downloads. When the download is confirmed, the file is renamed on
     // another thread, so reload the icon if the download filename changes.
     LoadIcon();
+
+    UpdateTooltip();
   }
 
   switch (download->state()) {
     case DownloadItem::REMOVING:
       parent_shelf_->RemoveDownloadItem(this);  // This will delete us!
       return;
     case DownloadItem::CANCELLED:
       StopDownloadProgress();
       gtk_widget_queue_draw(progress_area_.get());
       break;
@@ skipping 129 matching lines @@
 
 void DownloadItemGtk::LoadIcon() {
   icon_consumer_.CancelAllRequests();
   IconManager* im = g_browser_process->icon_manager();
   icon_filepath_ = get_download()->full_path();
   im->LoadIcon(icon_filepath_,
                IconLoader::SMALL, &icon_consumer_,
                NewCallback(this, &DownloadItemGtk::OnLoadIconComplete));
 }
 
+void DownloadItemGtk::UpdateTooltip() {
+  std::wstring elided_filename = gfx::ElideFilename(
+      get_download()->GetFileName(),
+      gfx::Font(), kTooltipMaxWidth);
+  gtk_widget_set_tooltip_text(body_.get(), WideToUTF8(elided_filename).c_str());
+}
+
 void DownloadItemGtk::UpdateNameLabel() {
   // TODO(estade): This is at best an educated guess, since we don't actually
   // use gfx::Font() to draw the text. This is why we need to add so
   // much padding when we set the size request. We need to either use gfx::Font
   // or somehow extend TextElider.
   std::wstring elided_filename = gfx::ElideFilename(
       get_download()->GetFileName(),
       gfx::Font(), kTextWidth);
 
   GdkColor color = theme_provider_->GetGdkColor(
@@ skipping 358 matching lines @@
 
 // static
 void DownloadItemGtk::OnDangerousDecline(GtkWidget* button,
                                          DownloadItemGtk* item) {
   UMA_HISTOGRAM_LONG_TIMES("clickjacking.discard_download",
                            base::Time::Now() - item->creation_time_);
   if (item->get_download()->state() == DownloadItem::IN_PROGRESS)
     item->get_download()->Cancel(true);
   item->get_download()->Remove(true);
 }