chrome/browser/ui/views/find_bar_host.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/find_bar_host.h"
   6
   7 #include <algorithm>
   8
   9 #include "chrome/browser/ui/find_bar/find_bar_controller.h"
  10 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
  11 #include "chrome/browser/ui/view_ids.h"
  12 #include "chrome/browser/ui/views/find_bar_view.h"
  13 #include "chrome/browser/ui/views/frame/browser_view.h"
  14 #include "content/public/browser/render_view_host.h"
  15 #include "content/public/browser/web_contents.h"
  16 #include "ui/events/event.h"
  17 #include "ui/events/keycodes/keyboard_codes.h"
  18 #include "ui/views/focus/external_focus_tracker.h"
  19 #include "ui/views/focus/view_storage.h"
  20 #include "ui/views/widget/root_view.h"
  21 #include "ui/views/widget/widget.h"
  22
  23 using content::NativeWebKeyboardEvent;
  24
  25 namespace chrome {
  26
  27 // Declared in browser_dialogs.h so others don't have to depend on our header.
  28 FindBar* CreateFindBar(BrowserView* browser_view) {
  29   return new FindBarHost(browser_view);
  30 }
  31
  32 }  // namespace chrome
  33
  34 ////////////////////////////////////////////////////////////////////////////////
  35 // FindBarHost, public:
  36
  37 FindBarHost::FindBarHost(BrowserView* browser_view)
  38     : DropdownBarHost(browser_view),
  39       find_bar_controller_(NULL) {
  40   FindBarView* find_bar_view = new FindBarView(this);
  41   Init(browser_view->find_bar_host_view(), find_bar_view, find_bar_view);
  42 }
  43
  44 FindBarHost::~FindBarHost() {
  45 }
  46
  47 bool FindBarHost::MaybeForwardKeyEventToWebpage(
  48     const ui::KeyEvent& key_event) {
  49   if (!ShouldForwardKeyEventToWebpageNative(key_event)) {
  50     // Native implementation says not to forward these events.
  51     return false;
  52   }
  53
  54   switch (key_event.key_code()) {
  55     case ui::VKEY_DOWN:
  56     case ui::VKEY_UP:
  57     case ui::VKEY_PRIOR:
  58     case ui::VKEY_NEXT:
  59       break;
  60     case ui::VKEY_HOME:
  61     case ui::VKEY_END:
  62       if (key_event.IsControlDown())
  63         break;
  64     // Fall through.
  65     default:
  66       return false;
  67   }
  68
  69   content::WebContents* contents = find_bar_controller_->web_contents();
  70   if (!contents)
  71     return false;
  72
  73   content::RenderViewHost* render_view_host = contents->GetRenderViewHost();
  74
  75   // Make sure we don't have a text field element interfering with keyboard
  76   // input. Otherwise Up and Down arrow key strokes get eaten. "Nom Nom Nom".
  77   render_view_host->ClearFocusedElement();
  78   NativeWebKeyboardEvent event = GetKeyboardEvent(contents, key_event);
  79   render_view_host->ForwardKeyboardEvent(event);
  80   return true;
  81 }
  82
  83 FindBarController* FindBarHost::GetFindBarController() const {
  84   return find_bar_controller_;
  85 }
  86
  87 void FindBarHost::SetFindBarController(FindBarController* find_bar_controller) {
  88   find_bar_controller_ = find_bar_controller;
  89 }
  90
  91 void FindBarHost::Show(bool animate) {
  92   DropdownBarHost::Show(animate);
  93 }
  94
  95 void FindBarHost::Hide(bool animate) {
  96   DropdownBarHost::Hide(animate);
  97 }
  98
  99 void FindBarHost::SetFocusAndSelection() {
 100   DropdownBarHost::SetFocusAndSelection();
 101 }
 102
 103 void FindBarHost::ClearResults(const FindNotificationDetails& results) {
 104   find_bar_view()->UpdateForResult(results, base::string16());
 105 }
 106
 107 void FindBarHost::StopAnimation() {
 108   DropdownBarHost::StopAnimation();
 109 }
 110
 111 void FindBarHost::MoveWindowIfNecessary(const gfx::Rect& selection_rect,
 112                                         bool no_redraw) {
 113   // We only move the window if one is active for the current WebContents. If we
 114   // don't check this, then SetWidgetPosition below will end up making the Find
 115   // Bar visible.
 116   content::WebContents* web_contents = find_bar_controller_->web_contents();
 117   if (!web_contents)
 118     return;
 119
 120   FindTabHelper* find_tab_helper = FindTabHelper::FromWebContents(web_contents);
 121   if (!find_tab_helper || !find_tab_helper->find_ui_active())
 122     return;
 123
 124   gfx::Rect new_pos = GetDialogPosition(selection_rect);
 125   SetDialogPosition(new_pos, no_redraw);
 126
 127   // May need to redraw our frame to accommodate bookmark bar styles.
 128   view()->Layout();  // Bounds may have changed.
 129   view()->SchedulePaint();
 130 }
 131
 132 void FindBarHost::SetFindTextAndSelectedRange(
 133     const base::string16& find_text,
 134     const gfx::Range& selected_range) {
 135   find_bar_view()->SetFindTextAndSelectedRange(find_text, selected_range);
 136 }
 137
 138 base::string16 FindBarHost::GetFindText() {
 139   return find_bar_view()->GetFindText();
 140 }
 141
 142 gfx::Range FindBarHost::GetSelectedRange() {
 143   return find_bar_view()->GetSelectedRange();
 144 }
 145
 146 void FindBarHost::UpdateUIForFindResult(const FindNotificationDetails& result,
 147                                         const base::string16& find_text) {
 148   // Make sure match count is clear. It may get set again in UpdateForResult
 149   // if enough data is available.
 150   find_bar_view()->ClearMatchCount();
 151
 152   if (!find_text.empty())
 153     find_bar_view()->UpdateForResult(result, find_text);
 154
 155   // We now need to check if the window is obscuring the search results.
 156   MoveWindowIfNecessary(result.selection_rect(), false);
 157
 158   // Once we find a match we no longer want to keep track of what had
 159   // focus. EndFindSession will then set the focus to the page content.
 160   if (result.number_of_matches() > 0)
 161     ResetFocusTracker();
 162 }
 163
 164 bool FindBarHost::IsFindBarVisible() {
 165   return DropdownBarHost::IsVisible();
 166 }
 167
 168 void FindBarHost::RestoreSavedFocus() {
 169   if (focus_tracker() == NULL) {
 170     // TODO(brettw): Focus() should be on WebContentsView.
 171     find_bar_controller_->web_contents()->Focus();
 172   } else {
 173     focus_tracker()->FocusLastFocusedExternalView();
 174   }
 175 }
 176
 177 bool FindBarHost::HasGlobalFindPasteboard() {
 178   return false;
 179 }
 180
 181 void FindBarHost::UpdateFindBarForChangedWebContents() {
 182 }
 183
 184 FindBarTesting* FindBarHost::GetFindBarTesting() {
 185   return this;
 186 }
 187
 188 ////////////////////////////////////////////////////////////////////////////////
 189 // FindBarWin, ui::AcceleratorTarget implementation:
 190
 191 bool FindBarHost::AcceleratorPressed(const ui::Accelerator& accelerator) {
 192   ui::KeyboardCode key = accelerator.key_code();
 193   if (key == ui::VKEY_RETURN && accelerator.IsCtrlDown()) {
 194     // Ctrl+Enter closes the Find session and navigates any link that is active.
 195     find_bar_controller_->EndFindSession(
 196         FindBarController::kActivateSelectionOnPage,
 197         FindBarController::kClearResultsInFindBox);
 198     return true;
 199   } else if (key == ui::VKEY_ESCAPE) {
 200     // This will end the Find session and hide the window, causing it to loose
 201     // focus and in the process unregister us as the handler for the Escape
 202     // accelerator through the OnWillChangeFocus event.
 203     find_bar_controller_->EndFindSession(
 204         FindBarController::kKeepSelectionOnPage,
 205         FindBarController::kKeepResultsInFindBox);
 206     return true;
 207   } else {
 208     NOTREACHED() << "Unknown accelerator";
 209   }
 210
 211   return false;
 212 }
 213
 214 bool FindBarHost::CanHandleAccelerators() const {
 215   return true;
 216 }
 217
 218 ////////////////////////////////////////////////////////////////////////////////
 219 // FindBarTesting implementation:
 220
 221 bool FindBarHost::GetFindBarWindowInfo(gfx::Point* position,
 222                                       bool* fully_visible) {
 223   if (!find_bar_controller_ ||
 224 #if defined(OS_WIN) && !defined(USE_AURA)
 225       !::IsWindow(host()->GetNativeView())) {
 226 #else
 227       false) {
 228       // TODO(sky): figure out linux side.
 229       // This is tricky due to asynchronous nature of x11.
 230       // See bug http://crbug.com/28629.
 231 #endif
 232     if (position)
 233       *position = gfx::Point();
 234     if (fully_visible)
 235       *fully_visible = false;
 236     return false;
 237   }
 238
 239   gfx::Rect window_rect = host()->GetWindowBoundsInScreen();
 240   if (position)
 241     *position = window_rect.origin();
 242   if (fully_visible)
 243     *fully_visible = IsVisible() && !IsAnimating();
 244   return true;
 245 }
 246
 247 base::string16 FindBarHost::GetFindSelectedText() {
 248   return find_bar_view()->GetFindSelectedText();
 249 }
 250
 251 base::string16 FindBarHost::GetMatchCountText() {
 252   return find_bar_view()->GetMatchCountText();
 253 }
 254
 255 int FindBarHost::GetWidth() {
 256   return view()->width();
 257 }
 258
 259 ////////////////////////////////////////////////////////////////////////////////
 260 // Overridden from DropdownBarHost:
 261
 262 gfx::Rect FindBarHost::GetDialogPosition(gfx::Rect avoid_overlapping_rect) {
 263   // Find the area we have to work with (after accounting for scrollbars, etc).
 264   gfx::Rect widget_bounds;
 265   GetWidgetBounds(&widget_bounds);
 266   if (widget_bounds.IsEmpty())
 267     return gfx::Rect();
 268
 269   // Ask the view how large an area it needs to draw on.
 270   gfx::Size prefsize = view()->GetPreferredSize();
 271
 272   // Limit width to the available area.
 273   if (widget_bounds.width() < prefsize.width())
 274     prefsize.set_width(widget_bounds.width());
 275
 276   // Don't show the find bar if |widget_bounds| is not tall enough.
 277   if (widget_bounds.height() < prefsize.height())
 278     return gfx::Rect();
 279
 280   // Place the view in the top right corner of the widget boundaries (top left
 281   // for RTL languages).
 282   gfx::Rect view_location;
 283   int x = widget_bounds.x();
 284   if (!base::i18n::IsRTL())
 285     x += widget_bounds.width() - prefsize.width();
 286   int y = widget_bounds.y();
 287   view_location.SetRect(x, y, prefsize.width(), prefsize.height());
 288
 289   // When we get Find results back, we specify a selection rect, which we
 290   // should strive to avoid overlapping. But first, we need to offset the
 291   // selection rect (if one was provided).
 292   if (!avoid_overlapping_rect.IsEmpty()) {
 293     // For comparison (with the Intersects function below) we need to account
 294     // for the fact that we draw the Find widget relative to the Chrome frame,
 295     // whereas the selection rect is relative to the page.
 296     GetWidgetPositionNative(&avoid_overlapping_rect);
 297   }
 298
 299   gfx::Rect new_pos = FindBarController::GetLocationForFindbarView(
 300       view_location, widget_bounds, avoid_overlapping_rect);
 301
 302   // While we are animating, the Find window will grow bottoms up so we need to
 303   // re-position the widget so that it appears to grow out of the toolbar.
 304   if (animation_offset() > 0)
 305     new_pos.Offset(0, std::min(0, -animation_offset()));
 306
 307   return new_pos;
 308 }
 309
 310 void FindBarHost::SetDialogPosition(const gfx::Rect& new_pos, bool no_redraw) {
 311   if (new_pos.IsEmpty())
 312     return;
 313
 314   // Make sure the window edges are clipped to just the visible region. We need
 315   // to do this before changing position, so that when we animate the closure
 316   // of it it doesn't look like the window crumbles into the toolbar.
 317   UpdateWindowEdges(new_pos);
 318
 319   SetWidgetPositionNative(new_pos, no_redraw);
 320
 321   // Tell the immersive mode controller about the find bar's new bounds. The
 322   // immersive mode controller uses the bounds to keep the top-of-window views
 323   // revealed when the mouse is hovered over the find bar.
 324   browser_view()->immersive_mode_controller()->OnFindBarVisibleBoundsChanged(
 325       host()->GetWindowBoundsInScreen());
 326 }
 327
 328 void FindBarHost::GetWidgetBounds(gfx::Rect* bounds) {
 329   DCHECK(bounds);
 330   // The BrowserView does Layout for the components that we care about
 331   // positioning relative to, so we ask it to tell us where we should go.
 332   *bounds = browser_view()->GetFindBarBoundingBox();
 333 }
 334
 335 void FindBarHost::RegisterAccelerators() {
 336   DropdownBarHost::RegisterAccelerators();
 337
 338   // Register for Ctrl+Return.
 339   ui::Accelerator escape(ui::VKEY_RETURN, ui::EF_CONTROL_DOWN);
 340   focus_manager()->RegisterAccelerator(
 341       escape, ui::AcceleratorManager::kNormalPriority, this);
 342 }
 343
 344 void FindBarHost::UnregisterAccelerators() {
 345   // Unregister Ctrl+Return.
 346   ui::Accelerator escape(ui::VKEY_RETURN, ui::EF_CONTROL_DOWN);
 347   focus_manager()->UnregisterAccelerator(escape, this);
 348
 349   DropdownBarHost::UnregisterAccelerators();
 350 }
 351
 352 void FindBarHost::OnVisibilityChanged() {
 353   // Tell the immersive mode controller about the find bar's bounds. The
 354   // immersive mode controller uses the bounds to keep the top-of-window views
 355   // revealed when the mouse is hovered over the find bar.
 356   gfx::Rect visible_bounds;
 357   if (IsVisible())
 358     visible_bounds = host()->GetWindowBoundsInScreen();
 359   browser_view()->immersive_mode_controller()->OnFindBarVisibleBoundsChanged(
 360       visible_bounds);
 361 }
 362
 363 ////////////////////////////////////////////////////////////////////////////////
 364 // private:
 365
 366 void FindBarHost::GetWidgetPositionNative(gfx::Rect* avoid_overlapping_rect) {
 367   gfx::Rect frame_rect = host()->GetTopLevelWidget()->GetWindowBoundsInScreen();
 368   gfx::Rect webcontents_rect =
 369       find_bar_controller_->web_contents()->GetViewBounds();
 370   avoid_overlapping_rect->Offset(0, webcontents_rect.y() - frame_rect.y());
 371 }