A keyboard widget that manages itself (the animation and all that).

chrome/browser/ui/touch/frame/touch_browser_frame_view.cc

 // Copyright (c) 2011 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/touch/frame/touch_browser_frame_view.h"
 
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/renderer_host/render_widget_host_view_views.h"
-#include "chrome/browser/tabs/tab_strip_model.h"
-#include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
-#include "chrome/browser/ui/touch/frame/keyboard_container_view.h"
-#include "chrome/browser/ui/views/frame/browser_view.h"
-#include "chrome/browser/ui/views/tab_contents/tab_contents_view_touch.h"
-#include "content/browser/renderer_host/render_view_host.h"
-#include "content/browser/tab_contents/navigation_controller.h"
-#include "content/browser/tab_contents/tab_contents.h"
-#include "content/browser/tab_contents/tab_contents_view.h"
-#include "content/common/notification_service.h"
-#include "content/common/notification_type.h"
-#include "content/common/view_messages.h"
-#include "ui/base/animation/slide_animation.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/transform.h"
+#include "chrome/browser/ui/touch/keyboard/keyboard_manager.h"
+#include "ui/base/ime/text_input_type.h"
 #include "views/controls/button/image_button.h"
 #include "views/controls/textfield/textfield.h"
 #include "views/focus/focus_manager.h"
-
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/input_method/virtual_keyboard_selector.h"
-#endif
-
-namespace {
-
-const int kDefaultKeyboardHeight = 300;
-const int kKeyboardSlideDuration = 300;  // In milliseconds
-
-PropertyAccessor<bool>* GetFocusedStateAccessor() {
-  static PropertyAccessor<bool> state;
-  return &state;
-}
-
-bool TabContentsHasFocus(const TabContents* contents) {
-  views::View* view = static_cast<TabContentsViewTouch*>(contents->view());
-  return view->Contains(view->GetFocusManager()->GetFocusedView());
-}
-
-}  // namespace
+#include "views/ime/text_input_client.h"
 
 // static
 const char TouchBrowserFrameView::kViewClassName[] =
     "browser/ui/touch/frame/TouchBrowserFrameView";
 
 ///////////////////////////////////////////////////////////////////////////////
 // TouchBrowserFrameView, public:
 
 TouchBrowserFrameView::TouchBrowserFrameView(BrowserFrame* frame,
                                              BrowserView* browser_view)
     : OpaqueBrowserFrameView(frame, browser_view),
-      keyboard_showing_(false),
-      keyboard_height_(kDefaultKeyboardHeight),
-      focus_listener_added_(false),
-      keyboard_(NULL) {
-  registrar_.Add(this,
-                 NotificationType::NAV_ENTRY_COMMITTED,
-                 NotificationService::AllSources());
-  registrar_.Add(this,
-                 NotificationType::FOCUS_CHANGED_IN_PAGE,
-                 NotificationService::AllSources());
-  registrar_.Add(this,
-                 NotificationType::TAB_CONTENTS_DESTROYED,
-                 NotificationService::AllSources());
-  registrar_.Add(this,
-                 NotificationType::HIDE_KEYBOARD_INVOKED,
-                 NotificationService::AllSources());
-  registrar_.Add(this,
-                 NotificationType::SET_KEYBOARD_HEIGHT_INVOKED,
-                 NotificationService::AllSources());
-  registrar_.Add(this,
-                 NotificationType::EDITABLE_ELEMENT_TOUCHED,
-                 NotificationService::AllSources());
-
-  browser_view->browser()->tabstrip_model()->AddObserver(this);
-
-  animation_.reset(new ui::SlideAnimation(this));
-  animation_->SetTweenType(ui::Tween::LINEAR);
-  animation_->SetSlideDuration(kKeyboardSlideDuration);
-
-#if defined(OS_CHROMEOS)
-  chromeos::input_method::InputMethodManager* manager =
-      chromeos::input_method::InputMethodManager::GetInstance();
-  manager->AddVirtualKeyboardObserver(this);
-#endif
+      focus_listener_added_(false) {
+  // Make sure the singleton KeyboardManager object is initialized.
+  KeyboardManager::GetInstance();
 }
 
 TouchBrowserFrameView::~TouchBrowserFrameView() {
-  browser_view()->browser()->tabstrip_model()->RemoveObserver(this);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// TouchBrowserFrameView, private:
+
+void TouchBrowserFrameView::FocusWillChange(views::View* focused_before,
+                                            views::View* focused_now) {
+  views::Widget* widget = focused_now ? focused_now->GetWidget() : NULL;
+  if (!widget || !widget->IsActive())
+    return;
+
+  views::TextInputClient* input =
+      focused_now ? focused_now->GetTextInputClient() : NULL;
+  // Show the keyboard if the focused view supports text-input.
+  KeyboardManager* keyboard = KeyboardManager::GetInstance();
+  if (input && input->GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE)
+    keyboard->ShowKeyboardForWidget(focused_now->GetWidget());
+  else
+    keyboard->Hide();
 }
 
 std::string TouchBrowserFrameView::GetClassName() const {
   return kViewClassName;
 }
 
-void TouchBrowserFrameView::Layout() {
-  OpaqueBrowserFrameView::Layout();
-
-  if (!keyboard_)
-    return;
-
-  keyboard_->SetVisible(keyboard_showing_ || animation_->is_animating());
-  gfx::Rect bounds = GetBoundsForReservedArea();
-  if (animation_->is_animating() && !keyboard_showing_) {
-    // The keyboard is in the process of hiding. So pretend it still has the
-    // same bounds as when the keyboard is visible. But
-    // |GetBoundsForReservedArea| should not take this into account so that the
-    // render view gets the entire area to relayout itself.
-    bounds.set_y(bounds.y() - keyboard_height_);
-    bounds.set_height(keyboard_height_);
-  }
-  keyboard_->SetBoundsRect(bounds);
-}
-
-void TouchBrowserFrameView::FocusWillChange(views::View* focused_before,
-                                            views::View* focused_now) {
-  VirtualKeyboardType before = DecideKeyboardStateForView(focused_before);
-  VirtualKeyboardType now = DecideKeyboardStateForView(focused_now);
-  if (before != now) {
-    // TODO(varunjain): support other types of keyboard.
-    UpdateKeyboardAndLayout(now == GENERIC);
-  }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// TouchBrowserFrameView, protected:
-
-int TouchBrowserFrameView::GetReservedHeight() const {
-  return keyboard_showing_ ? keyboard_height_ : 0;
-}
-
 void TouchBrowserFrameView::ViewHierarchyChanged(bool is_add,
                                                  View* parent,
                                                  View* child) {
   OpaqueBrowserFrameView::ViewHierarchyChanged(is_add, parent, child);
   if (!GetFocusManager())
     return;
 
   if (is_add && !focus_listener_added_) {
     // Add focus listener when this view is added to the hierarchy.
     GetFocusManager()->AddFocusChangeListener(this);
     focus_listener_added_ = true;
   } else if (!is_add && focus_listener_added_) {
     // Remove focus listener when this view is removed from the hierarchy.
     GetFocusManager()->RemoveFocusChangeListener(this);
     focus_listener_added_ = false;
   }
 }
 
-///////////////////////////////////////////////////////////////////////////////
-// TouchBrowserFrameView, private:
-
-void TouchBrowserFrameView::InitVirtualKeyboard() {
-  if (keyboard_)
-    return;
-
-  Profile* keyboard_profile = browser_view()->browser()->profile();
-  DCHECK(keyboard_profile) << "Profile required for virtual keyboard.";
-
-  keyboard_ = new KeyboardContainerView(keyboard_profile,
-      browser_view()->browser());
-  keyboard_->SetVisible(false);
-  AddChildView(keyboard_);
-}
-
-void TouchBrowserFrameView::UpdateKeyboardAndLayout(bool should_show_keyboard) {
-  if (should_show_keyboard)
-    InitVirtualKeyboard();
-
-  if (should_show_keyboard == keyboard_showing_)
-    return;
-
-  DCHECK(keyboard_);
-
-  keyboard_showing_ = should_show_keyboard;
-  if (keyboard_showing_) {
-    // We don't re-layout the client view until the animation ends (see
-    // AnimationEnded below) because we want the client view to occupy the
-    // entire height during the animation. It is necessary to reset the
-    // transform for the keyboard first so that the contents are sized properly
-    // when layout, and then start the animation.
-    ui::Transform reset;
-    keyboard_->SetTransform(reset);
-    Layout();
-
-    animation_->Show();
-  } else {
-    animation_->Hide();
-
-    browser_view()->set_clip_y(ui::Tween::ValueBetween(
-          animation_->GetCurrentValue(), 0, keyboard_height_));
-    parent()->Layout();
-  }
-}
-
-TouchBrowserFrameView::VirtualKeyboardType
-    TouchBrowserFrameView::DecideKeyboardStateForView(views::View* view) {
-  if (!view)
-    return NONE;
-
-  std::string cname = view->GetClassName();
-  if (cname == views::Textfield::kViewClassName) {
-    return GENERIC;
-  } else if (cname == RenderWidgetHostViewViews::kViewClassName) {
-    TabContents* contents = browser_view()->browser()->GetSelectedTabContents();
-    bool* editable = contents ? GetFocusedStateAccessor()->GetProperty(
-        contents->property_bag()) : NULL;
-    if (editable && *editable)
-      return GENERIC;
-  }
-  return NONE;
-}
-
 bool TouchBrowserFrameView::HitTest(const gfx::Point& point) const {
   if (OpaqueBrowserFrameView::HitTest(point))
     return true;
 
   if (close_button()->IsVisible() &&
       close_button()->GetMirroredBounds().Contains(point))
     return true;
   if (restore_button()->IsVisible() &&
       restore_button()->GetMirroredBounds().Contains(point))
     return true;
   if (maximize_button()->IsVisible() &&
       maximize_button()->GetMirroredBounds().Contains(point))
     return true;
   if (minimize_button()->IsVisible() &&
       minimize_button()->GetMirroredBounds().Contains(point))
     return true;
 
   return false;
 }
-
-void TouchBrowserFrameView::ActiveTabChanged(TabContentsWrapper* old_contents,
-                                             TabContentsWrapper* new_contents,
-                                             int index,
-                                             bool user_gesture) {
-  TabContents* contents = new_contents->tab_contents();
-  if (!TabContentsHasFocus(contents))
-    return;
-
-  bool* editable = GetFocusedStateAccessor()->GetProperty(
-      contents->property_bag());
-  UpdateKeyboardAndLayout(editable ? *editable : false);
-}
-
-void TouchBrowserFrameView::TabStripEmpty() {
-  if (animation_->is_animating()) {
-    // Reset the delegate so the AnimationEnded callback doesn't trigger.
-    animation_->set_delegate(NULL);
-    animation_->Stop();
-  }
-}
-
-void TouchBrowserFrameView::Observe(NotificationType type,
-                                    const NotificationSource& source,
-                                    const NotificationDetails& details) {
-  Browser* browser = browser_view()->browser();
-  if (type == NotificationType::FOCUS_CHANGED_IN_PAGE) {
-    // Only modify the keyboard state if the currently active tab sent the
-    // notification.
-    const TabContents* current_tab = browser->GetSelectedTabContents();
-    TabContents* source_tab = Source<TabContents>(source).ptr();
-    const bool editable = *Details<const bool>(details).ptr();
-
-    if (current_tab == source_tab && TabContentsHasFocus(source_tab))
-      UpdateKeyboardAndLayout(editable);
-
-    // Save the state of the focused field so that the keyboard visibility
-    // can be determined after tab switching.
-    GetFocusedStateAccessor()->SetProperty(
-        source_tab->property_bag(), editable);
-  } else if (type == NotificationType::NAV_ENTRY_COMMITTED) {
-    NavigationController* controller =
-        Source<NavigationController>(source).ptr();
-    Browser* source_browser = Browser::GetBrowserForController(
-        controller, NULL);
-
-    // If the Browser for the keyboard has navigated, re-evaluate the visibility
-    // of the keyboard.
-    TouchBrowserFrameView::VirtualKeyboardType keyboard_type = NONE;
-    views::View* view = GetFocusManager()->GetFocusedView();
-    if (view) {
-      if (view->GetClassName() == views::Textfield::kViewClassName)
-        keyboard_type = GENERIC;
-      if (view->GetClassName() == RenderWidgetHostViewViews::kViewClassName) {
-        // Reset the state of the focused field in the current tab.
-        GetFocusedStateAccessor()->SetProperty(
-            controller->tab_contents()->property_bag(), false);
-      }
-    }
-    if (source_browser == browser)
-      UpdateKeyboardAndLayout(keyboard_type == GENERIC);
-  } else if (type == NotificationType::TAB_CONTENTS_DESTROYED) {
-    GetFocusedStateAccessor()->DeleteProperty(
-        Source<TabContents>(source).ptr()->property_bag());
-  } else if (type == NotificationType::PREF_CHANGED) {
-    OpaqueBrowserFrameView::Observe(type, source, details);
-  } else if (type == NotificationType::HIDE_KEYBOARD_INVOKED) {
-    TabContents* tab_contents =
-        browser_view()->browser()->GetSelectedTabContents();
-    if (tab_contents) {
-      GetFocusedStateAccessor()->SetProperty(tab_contents->property_bag(),
-                                             false);
-    }
-    UpdateKeyboardAndLayout(false);
-  } else if (type == NotificationType::SET_KEYBOARD_HEIGHT_INVOKED) {
-    // TODO(penghuang) Allow extension conrtol the virtual keyboard directly
-    // instead of using Notification.
-    int height = *reinterpret_cast<int*>(details.map_key());
-    if (height != keyboard_height_) {
-      DCHECK_GE(height, 0) << "Height of the keyboard is less than 0.";
-      DCHECK_LE(height, View::height()) << "Height of the keyboard is greater "
-        "than the height of frame view.";
-      keyboard_height_ = height;
-      parent()->Layout();
-    }
-  } else if (type == NotificationType::EDITABLE_ELEMENT_TOUCHED) {
-    UpdateKeyboardAndLayout(true);
-  }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// ui::AnimationDelegate implementation
-void TouchBrowserFrameView::AnimationProgressed(const ui::Animation* anim) {
-  ui::Transform transform;
-  transform.SetTranslateY(
-      ui::Tween::ValueBetween(anim->GetCurrentValue(), keyboard_height_, 0));
-  keyboard_->SetTransform(transform);
-  browser_view()->set_clip_y(
-      ui::Tween::ValueBetween(anim->GetCurrentValue(), 0, keyboard_height_));
-  SchedulePaint();
-}
-
-void TouchBrowserFrameView::AnimationEnded(const ui::Animation* animation) {
-  browser_view()->set_clip_y(0);
-  if (keyboard_showing_) {
-    // Because the NonClientFrameView is a sibling of the ClientView, we rely on
-    // the parent to resize the ClientView instead of resizing it directly.
-    parent()->Layout();
-
-    // The keyboard that pops up may end up hiding the text entry. So make sure
-    // the renderer scrolls when necessary to keep the textfield visible.
-    RenderViewHost* host =
-        browser_view()->browser()->GetSelectedTabContents()->render_view_host();
-    host->Send(new ViewMsg_ScrollFocusedEditableNodeIntoView(
-        host->routing_id()));
-  } else {
-    // Notify the keyboard that it is hidden now.
-    keyboard_->SetVisible(false);
-  }
-  SchedulePaint();
-}
-
-#if defined(OS_CHROMEOS)
-void TouchBrowserFrameView::VirtualKeyboardChanged(
-    chromeos::input_method::InputMethodManager* manager,
-    const chromeos::input_method::VirtualKeyboard& virtual_keyboard,
-    const std::string& virtual_keyboard_layout) {
-  if (!keyboard_)
-    return;
-
-  const GURL& url = virtual_keyboard.GetURLForLayout(virtual_keyboard_layout);
-  keyboard_->LoadURL(url);
-  VLOG(1) << "VirtualKeyboardChanged: Switched to " << url.spec();
-}
-#endif