chrome/browser/ui/views/frame/browser_root_view.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/views/frame/browser_root_view.h"
   6
   7 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
   8 #include "chrome/browser/autocomplete/autocomplete_classifier_factory.h"
   9 #include "chrome/browser/autocomplete/autocomplete_match.h"
  10 #include "chrome/browser/defaults.h"
  11 #include "chrome/browser/profiles/profile.h"
  12 #include "chrome/browser/ui/browser_commands.h"
  13 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  14 #include "chrome/browser/ui/views/frame/browser_frame.h"
  15 #include "chrome/browser/ui/views/frame/browser_view.h"
  16 #include "chrome/browser/ui/views/tabs/tab_strip.h"
  17 #include "chrome/browser/ui/views/touch_uma/touch_uma.h"
  18 #include "ui/base/dragdrop/drag_drop_types.h"
  19 #include "ui/base/dragdrop/os_exchange_data.h"
  20
  21 // static
  22 const char BrowserRootView::kViewClassName[] =
  23     "browser/ui/views/frame/BrowserRootView";
  24
  25 BrowserRootView::BrowserRootView(BrowserView* browser_view,
  26                                  views::Widget* widget)
  27     : views::internal::RootView(widget),
  28       browser_view_(browser_view),
  29       forwarding_to_tab_strip_(false) { }
  30
  31 bool BrowserRootView::GetDropFormats(
  32       int* formats,
  33       std::set<ui::OSExchangeData::CustomFormat>* custom_formats) {
  34   if (tabstrip() && tabstrip()->visible()) {
  35     *formats = ui::OSExchangeData::URL | ui::OSExchangeData::STRING;
  36     return true;
  37   }
  38   return false;
  39 }
  40
  41 bool BrowserRootView::AreDropTypesRequired() {
  42   return true;
  43 }
  44
  45 bool BrowserRootView::CanDrop(const ui::OSExchangeData& data) {
  46   if (!tabstrip() || !tabstrip()->visible())
  47     return false;
  48
  49   // If there is a URL, we'll allow the drop.
  50   if (data.HasURL())
  51     return true;
  52
  53   // If there isn't a URL, see if we can 'paste and go'.
  54   return GetPasteAndGoURL(data, NULL);
  55 }
  56
  57 void BrowserRootView::OnDragEntered(const ui::DropTargetEvent& event) {
  58   if (ShouldForwardToTabStrip(event)) {
  59     forwarding_to_tab_strip_ = true;
  60     scoped_ptr<ui::DropTargetEvent> mapped_event(
  61         MapEventToTabStrip(event, event.data()));
  62     tabstrip()->OnDragEntered(*mapped_event.get());
  63   }
  64 }
  65
  66 int BrowserRootView::OnDragUpdated(const ui::DropTargetEvent& event) {
  67   if (ShouldForwardToTabStrip(event)) {
  68     scoped_ptr<ui::DropTargetEvent> mapped_event(
  69         MapEventToTabStrip(event, event.data()));
  70     if (!forwarding_to_tab_strip_) {
  71       tabstrip()->OnDragEntered(*mapped_event.get());
  72       forwarding_to_tab_strip_ = true;
  73     }
  74     return tabstrip()->OnDragUpdated(*mapped_event.get());
  75   } else if (forwarding_to_tab_strip_) {
  76     forwarding_to_tab_strip_ = false;
  77     tabstrip()->OnDragExited();
  78   }
  79   return ui::DragDropTypes::DRAG_NONE;
  80 }
  81
  82 void BrowserRootView::OnDragExited() {
  83   if (forwarding_to_tab_strip_) {
  84     forwarding_to_tab_strip_ = false;
  85     tabstrip()->OnDragExited();
  86   }
  87 }
  88
  89 int BrowserRootView::OnPerformDrop(const ui::DropTargetEvent& event) {
  90   if (!forwarding_to_tab_strip_)
  91     return ui::DragDropTypes::DRAG_NONE;
  92
  93   // Extract the URL and create a new ui::OSExchangeData containing the URL. We
  94   // do this as the TabStrip doesn't know about the autocomplete edit and needs
  95   // to know about it to handle 'paste and go'.
  96   GURL url;
  97   base::string16 title;
  98   ui::OSExchangeData mapped_data;
  99   if (!event.data().GetURLAndTitle(
 100            ui::OSExchangeData::CONVERT_FILENAMES, &url, &title) ||
 101       !url.is_valid()) {
 102     // The url isn't valid. Use the paste and go url.
 103     if (GetPasteAndGoURL(event.data(), &url))
 104       mapped_data.SetURL(url, base::string16());
 105     // else case: couldn't extract a url or 'paste and go' url. This ends up
 106     // passing through an ui::OSExchangeData with nothing in it. We need to do
 107     // this so that the tab strip cleans up properly.
 108   } else {
 109     mapped_data.SetURL(url, base::string16());
 110   }
 111   forwarding_to_tab_strip_ = false;
 112   scoped_ptr<ui::DropTargetEvent> mapped_event(
 113       MapEventToTabStrip(event, mapped_data));
 114   return tabstrip()->OnPerformDrop(*mapped_event);
 115 }
 116
 117 const char* BrowserRootView::GetClassName() const {
 118   return kViewClassName;
 119 }
 120
 121 bool BrowserRootView::OnMouseWheel(const ui::MouseWheelEvent& event) {
 122   if (browser_defaults::kScrollEventChangesTab) {
 123     // Switch to the left/right tab if the wheel-scroll happens over the
 124     // tabstrip, or the empty space beside the tabstrip.
 125     views::View* hit_view = GetEventHandlerForPoint(event.location());
 126     views::NonClientView* non_client = GetWidget()->non_client_view();
 127     if (tabstrip()->Contains(hit_view) ||
 128         hit_view == non_client->frame_view()) {
 129       int scroll_offset = abs(event.y_offset()) > abs(event.x_offset()) ?
 130           event.y_offset() : -event.x_offset();
 131       Browser* browser = browser_view_->browser();
 132       TabStripModel* model = browser->tab_strip_model();
 133       // Switch to the next tab only if not at the end of the tab-strip.
 134       if (scroll_offset < 0 && model->active_index() + 1 < model->count()) {
 135         chrome::SelectNextTab(browser);
 136         return true;
 137       }
 138
 139       // Switch to the previous tab only if not at the beginning of the
 140       // tab-strip.
 141       if (scroll_offset > 0 && model->active_index() > 0) {
 142         chrome::SelectPreviousTab(browser);
 143         return true;
 144       }
 145     }
 146   }
 147   return RootView::OnMouseWheel(event);
 148 }
 149
 150 void BrowserRootView::DispatchGestureEvent(ui::GestureEvent* event) {
 151   if (event->type() == ui::ET_GESTURE_TAP &&
 152       event->location().y() <= 0 &&
 153       event->location().x() <= browser_view_->GetBounds().width()) {
 154     TouchUMA::RecordGestureAction(TouchUMA::GESTURE_ROOTVIEWTOP_TAP);
 155   }
 156
 157   RootView::DispatchGestureEvent(event);
 158 }
 159
 160 bool BrowserRootView::ShouldForwardToTabStrip(
 161     const ui::DropTargetEvent& event) {
 162   if (!tabstrip()->visible())
 163     return false;
 164
 165   // Allow the drop as long as the mouse is over the tabstrip or vertically
 166   // before it.
 167   gfx::Point tab_loc_in_host;
 168   ConvertPointToTarget(tabstrip(), this, &tab_loc_in_host);
 169   return event.y() < tab_loc_in_host.y() + tabstrip()->height();
 170 }
 171
 172 ui::DropTargetEvent* BrowserRootView::MapEventToTabStrip(
 173     const ui::DropTargetEvent& event,
 174     const ui::OSExchangeData& data) {
 175   gfx::Point tab_strip_loc(event.location());
 176   ConvertPointToTarget(this, tabstrip(), &tab_strip_loc);
 177   return new ui::DropTargetEvent(data, tab_strip_loc, tab_strip_loc,
 178                                  event.source_operations());
 179 }
 180
 181 TabStrip* BrowserRootView::tabstrip() const {
 182   return browser_view_->tabstrip();
 183 }
 184
 185 bool BrowserRootView::GetPasteAndGoURL(const ui::OSExchangeData& data,
 186                                        GURL* url) {
 187   if (!data.HasString())
 188     return false;
 189
 190   base::string16 text;
 191   if (!data.GetString(&text) || text.empty())
 192     return false;
 193   text = AutocompleteMatch::SanitizeString(text);
 194
 195   AutocompleteMatch match;
 196   AutocompleteClassifierFactory::GetForProfile(
 197       browser_view_->browser()->profile())->Classify(text, false, false, &match,
 198                                                      NULL);
 199   if (!match.destination_url.is_valid())
 200     return false;
 201
 202   if (url)
 203     *url = match.destination_url;
 204   return true;
 205 }