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// 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/views/dropdown_bar_host.h"
#include "app/slide_animation.h"
#include "base/keyboard_codes.h"
#include "chrome/browser/browser.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/view_ids.h"
#include "chrome/browser/views/dropdown_bar_view.h"
#include "chrome/browser/views/frame/browser_view.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/tab_contents/tab_contents_view.h"
#include "views/focus/external_focus_tracker.h"
#include "views/focus/view_storage.h"
#include "views/widget/widget.h"
// static
bool DropdownBarHost::disable_animations_during_testing_ = false;
////////////////////////////////////////////////////////////////////////////////
// DropdownBarHost, public:
DropdownBarHost::DropdownBarHost(BrowserView* browser_view)
: browser_view_(browser_view),
animation_offset_(0),
esc_accel_target_registered_(false) {
}
void DropdownBarHost::Init(DropdownBarView* view) {
view_ = view;
// Initialize the host.
host_.reset(CreateHost());
host_->Init(GetNativeView(browser_view_), gfx::Rect());
host_->SetContentsView(view_);
// Start listening to focus changes, so we can register and unregister our
// own handler for Escape.
focus_manager_ =
views::FocusManager::GetFocusManagerForNativeView(host_->GetNativeView());
if (focus_manager_) {
focus_manager_->AddFocusChangeListener(this);
} else {
// In some cases (see bug http://crbug.com/17056) it seems we may not have
// a focus manager. Please reopen the bug if you hit this.
NOTREACHED();
}
// Start the process of animating the opening of the widget.
animation_.reset(new SlideAnimation(this));
}
DropdownBarHost::~DropdownBarHost() {
focus_manager_->RemoveFocusChangeListener(this);
focus_tracker_.reset(NULL);
}
void DropdownBarHost::Show() {
// Stores the currently focused view, and tracks focus changes so that we can
// restore focus when the dropdown widget is closed.
focus_tracker_.reset(new views::ExternalFocusTracker(view_, focus_manager_));
if (disable_animations_during_testing_) {
animation_->Reset(1);
AnimationProgressed(animation_.get());
} else {
animation_->Reset();
animation_->Show();
}
}
void DropdownBarHost::SetFocusAndSelection() {
view_->SetFocusAndSelection();
}
bool DropdownBarHost::IsAnimating() const {
return animation_->IsAnimating();
}
void DropdownBarHost::Hide(bool animate) {
if (animate && !disable_animations_during_testing_) {
animation_->Reset(1.0);
animation_->Hide();
} else {
host_->Hide();
}
}
void DropdownBarHost::StopAnimation() {
animation_->End();
}
bool DropdownBarHost::IsVisible() const {
return host_->IsVisible();
}
////////////////////////////////////////////////////////////////////////////////
// DropdownBarHost, views::FocusChangeListener implementation:
void DropdownBarHost::FocusWillChange(views::View* focused_before,
views::View* focused_now) {
// First we need to determine if one or both of the views passed in are child
// views of our view.
bool our_view_before = focused_before && view_->IsParentOf(focused_before);
bool our_view_now = focused_now && view_->IsParentOf(focused_now);
// When both our_view_before and our_view_now are false, it means focus is
// changing hands elsewhere in the application (and we shouldn't do anything).
// Similarly, when both are true, focus is changing hands within the dropdown
// widget (and again, we should not do anything). We therefore only need to
// look at when we gain initial focus and when we loose it.
if (!our_view_before && our_view_now) {
// We are gaining focus from outside the dropdown widget so we must register
// a handler for Escape.
RegisterEscAccelerator();
} else if (our_view_before && !our_view_now) {
// We are losing focus to something outside our widget so we restore the
// original handler for Escape.
UnregisterEscAccelerator();
}
}
////////////////////////////////////////////////////////////////////////////////
// DropdownBarHost, AnimationDelegate implementation:
void DropdownBarHost::AnimationProgressed(const Animation* animation) {
// First, we calculate how many pixels to slide the widget.
gfx::Size pref_size = view_->GetPreferredSize();
animation_offset_ = static_cast<int>((1.0 - animation_->GetCurrentValue()) *
pref_size.height());
// This call makes sure it appears in the right location, the size and shape
// is correct and that it slides in the right direction.
gfx::Rect dlg_rect = GetDialogPosition(gfx::Rect());
SetDialogPosition(dlg_rect, false);
// Let the view know if we are animating, and at which offset to draw the
// edges.
view_->set_animation_offset(animation_offset_);
view_->SchedulePaint();
}
void DropdownBarHost::AnimationEnded(const Animation* animation) {
// Place the dropdown widget in its fully opened state.
animation_offset_ = 0;
if (!animation_->IsShowing()) {
// Animation has finished closing.
host_->Hide();
} else {
// Animation has finished opening.
}
}
void DropdownBarHost::GetThemePosition(gfx::Rect* bounds) {
*bounds = GetDialogPosition(gfx::Rect());
gfx::Rect toolbar_bounds = browser_view_->GetToolbarBounds();
gfx::Rect tab_strip_bounds = browser_view_->GetTabStripBounds();
bounds->Offset(-toolbar_bounds.x(), -tab_strip_bounds.y());
}
////////////////////////////////////////////////////////////////////////////////
// DropdownBarHost protected:
void DropdownBarHost::ResetFocusTracker() {
focus_tracker_.reset(NULL);
}
void DropdownBarHost::GetWidgetBounds(gfx::Rect* bounds) {
DCHECK(bounds);
// The BrowserView does Layout for the components that we care about
// positioning relative to, so we ask it to tell us where we should go.
*bounds = browser_view_->GetFindBarBoundingBox();
}
void DropdownBarHost::RegisterEscAccelerator() {
DCHECK(!esc_accel_target_registered_);
views::Accelerator escape(base::VKEY_ESCAPE, false, false, false);
focus_manager_->RegisterAccelerator(escape, this);
esc_accel_target_registered_ = true;
}
void DropdownBarHost::UnregisterEscAccelerator() {
DCHECK(esc_accel_target_registered_);
views::Accelerator escape(base::VKEY_ESCAPE, false, false, false);
focus_manager_->UnregisterAccelerator(escape, this);
esc_accel_target_registered_ = false;
}
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