// 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/views/tabs/dragged_tab_controller.h"
#include <math.h>
#include <set>
#include "app/animation.h"
#include "app/slide_animation.h"
#include "app/resource_bundle.h"
#include "base/callback.h"
#include "base/i18n/rtl.h"
#include "chrome/browser/browser_window.h"
#include "chrome/browser/extensions/extension_function_dispatcher.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/tabs/tab_strip_model.h"
#include "chrome/browser/metrics/user_metrics.h"
#include "chrome/browser/views/frame/browser_view.h"
#include "chrome/browser/views/tabs/base_tab.h"
#include "chrome/browser/views/tabs/base_tab_strip.h"
#include "chrome/browser/views/tabs/browser_tab_strip_controller.h"
#include "chrome/browser/views/tabs/dragged_tab_view.h"
#include "chrome/browser/views/tabs/native_view_photobooth.h"
#include "chrome/browser/views/tabs/side_tab.h"
#include "chrome/browser/views/tabs/side_tab_strip.h"
#include "chrome/browser/views/tabs/tab.h"
#include "chrome/browser/views/tabs/tab_strip.h"
#include "chrome/common/notification_service.h"
#include "gfx/canvas_skia.h"
#include "grit/theme_resources.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "views/event.h"
#include "views/widget/root_view.h"
#include "views/widget/widget.h"
#include "views/window/window.h"
#if defined(OS_WIN)
#include "views/widget/widget_win.h"
#endif
#if defined(OS_LINUX)
#include <gdk/gdk.h>
#include <gdk/gdkkeysyms.h>
#endif
static const int kHorizontalMoveThreshold = 16; // Pixels.
// Distance in pixels the user must move the mouse before we consider moving
// an attached vertical tab.
static const int kVerticalMoveThreshold = 8;
// If non-null there is a drag underway.
static DraggedTabController* instance_;
namespace {
// Delay, in ms, during dragging before we bring a window to front.
const int kBringToFrontDelay = 750;
// Radius of the rect drawn by DockView.
const int kRoundedRectRadius = 4;
// Spacing between tab icons when DockView is showing a docking location that
// contains more than one tab.
const int kTabSpacing = 4;
// DockView is the view responsible for giving a visual indicator of where a
// dock is going to occur.
class DockView : public views::View {
public:
explicit DockView(DockInfo::Type type) : type_(type) {}
virtual gfx::Size GetPreferredSize() {
return gfx::Size(DockInfo::popup_width(), DockInfo::popup_height());
}
virtual void PaintBackground(gfx::Canvas* canvas) {
SkRect outer_rect = { SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(width()),
SkIntToScalar(height()) };
// Fill the background rect.
SkPaint paint;
paint.setColor(SkColorSetRGB(108, 108, 108));
paint.setStyle(SkPaint::kFill_Style);
canvas->AsCanvasSkia()->drawRoundRect(
outer_rect, SkIntToScalar(kRoundedRectRadius),
SkIntToScalar(kRoundedRectRadius), paint);
ResourceBundle& rb = ResourceBundle::GetSharedInstance();
SkBitmap* high_icon = rb.GetBitmapNamed(IDR_DOCK_HIGH);
SkBitmap* wide_icon = rb.GetBitmapNamed(IDR_DOCK_WIDE);
canvas->Save();
bool rtl_ui = base::i18n::IsRTL();
if (rtl_ui) {
// Flip canvas to draw the mirrored tab images for RTL UI.
canvas->TranslateInt(width(), 0);
canvas->ScaleInt(-1, 1);
}
int x_of_active_tab = width() / 2 + kTabSpacing / 2;
int x_of_inactive_tab = width() / 2 - high_icon->width() - kTabSpacing / 2;
switch (type_) {
case DockInfo::LEFT_OF_WINDOW:
case DockInfo::LEFT_HALF:
if (!rtl_ui)
std::swap(x_of_active_tab, x_of_inactive_tab);
canvas->DrawBitmapInt(*high_icon, x_of_active_tab,
(height() - high_icon->height()) / 2);
if (type_ == DockInfo::LEFT_OF_WINDOW) {
DrawBitmapWithAlpha(canvas, *high_icon, x_of_inactive_tab,
(height() - high_icon->height()) / 2);
}
break;
case DockInfo::RIGHT_OF_WINDOW:
case DockInfo::RIGHT_HALF:
if (rtl_ui)
std::swap(x_of_active_tab, x_of_inactive_tab);
canvas->DrawBitmapInt(*high_icon, x_of_active_tab,
(height() - high_icon->height()) / 2);
if (type_ == DockInfo::RIGHT_OF_WINDOW) {
DrawBitmapWithAlpha(canvas, *high_icon, x_of_inactive_tab,
(height() - high_icon->height()) / 2);
}
break;
case DockInfo::TOP_OF_WINDOW:
canvas->DrawBitmapInt(*wide_icon, (width() - wide_icon->width()) / 2,
height() / 2 - high_icon->height());
break;
case DockInfo::MAXIMIZE: {
SkBitmap* max_icon = rb.GetBitmapNamed(IDR_DOCK_MAX);
canvas->DrawBitmapInt(*max_icon, (width() - max_icon->width()) / 2,
(height() - max_icon->height()) / 2);
break;
}
case DockInfo::BOTTOM_HALF:
case DockInfo::BOTTOM_OF_WINDOW:
canvas->DrawBitmapInt(*wide_icon, (width() - wide_icon->width()) / 2,
height() / 2 + kTabSpacing / 2);
if (type_ == DockInfo::BOTTOM_OF_WINDOW) {
DrawBitmapWithAlpha(canvas, *wide_icon,
(width() - wide_icon->width()) / 2,
height() / 2 - kTabSpacing / 2 - wide_icon->height());
}
break;
default:
NOTREACHED();
break;
}
canvas->Restore();
}
private:
void DrawBitmapWithAlpha(gfx::Canvas* canvas, const SkBitmap& image,
int x, int y) {
SkPaint paint;
paint.setAlpha(128);
canvas->DrawBitmapInt(image, x, y, paint);
}
DockInfo::Type type_;
DISALLOW_COPY_AND_ASSIGN(DockView);
};
gfx::Point ConvertScreenPointToTabStripPoint(BaseTabStrip* tabstrip,
const gfx::Point& screen_point) {
gfx::Point tabstrip_topleft;
views::View::ConvertPointToScreen(tabstrip, &tabstrip_topleft);
return gfx::Point(screen_point.x() - tabstrip_topleft.x(),
screen_point.y() - tabstrip_topleft.y());
}
// Returns the the x-coordinate of |point| if the type of tabstrip is horizontal
// otherwise returns the y-coordinate.
int MajorAxisValue(const gfx::Point& point, BaseTabStrip* tabstrip) {
return (tabstrip->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) ?
point.x() : point.y();
}
} // namespace
///////////////////////////////////////////////////////////////////////////////
// DockDisplayer
// DockDisplayer is responsible for giving the user a visual indication of a
// possible dock position (as represented by DockInfo). DockDisplayer shows
// a window with a DockView in it. Two animations are used that correspond to
// the state of DockInfo::in_enable_area.
class DraggedTabController::DockDisplayer : public AnimationDelegate {
public:
DockDisplayer(DraggedTabController* controller,
const DockInfo& info)
: controller_(controller),
popup_(NULL),
popup_view_(NULL),
ALLOW_THIS_IN_INITIALIZER_LIST(animation_(this)),
hidden_(false),
in_enable_area_(info.in_enable_area()) {
#if defined(OS_WIN)
views::WidgetWin* popup = new views::WidgetWin;
popup_ = popup;
popup->set_window_style(WS_POPUP);
popup->set_window_ex_style(WS_EX_LAYERED | WS_EX_TOOLWINDOW |
WS_EX_TOPMOST);
popup->SetOpacity(0x00);
popup->Init(NULL, info.GetPopupRect());
popup->SetContentsView(new DockView(info.type()));
if (info.in_enable_area())
animation_.Reset(1);
else
animation_.Show();
popup->SetWindowPos(HWND_TOP, 0, 0, 0, 0,
SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOMOVE | SWP_SHOWWINDOW);
#else
NOTIMPLEMENTED();
#endif
popup_view_ = popup_->GetNativeView();
}
~DockDisplayer() {
if (controller_)
controller_->DockDisplayerDestroyed(this);
}
// Updates the state based on |in_enable_area|.
void UpdateInEnabledArea(bool in_enable_area) {
if (in_enable_area != in_enable_area_) {
in_enable_area_ = in_enable_area;
UpdateLayeredAlpha();
}
}
// Resets the reference to the hosting DraggedTabController. This is invoked
// when the DraggedTabController is destoryed.
void clear_controller() { controller_ = NULL; }
// NativeView of the window we create.
gfx::NativeView popup_view() { return popup_view_; }
// Starts the hide animation. When the window is closed the
// DraggedTabController is notified by way of the DockDisplayerDestroyed
// method
void Hide() {
if (hidden_)
return;
if (!popup_) {
delete this;
return;
}
hidden_ = true;
animation_.Hide();
}
virtual void AnimationProgressed(const Animation* animation) {
UpdateLayeredAlpha();
}
virtual void AnimationEnded(const Animation* animation) {
if (!hidden_)
return;
#if defined(OS_WIN)
static_cast<views::WidgetWin*>(popup_)->Close();
#else
NOTIMPLEMENTED();
#endif
delete this;
}
virtual void UpdateLayeredAlpha() {
#if defined(OS_WIN)
double scale = in_enable_area_ ? 1 : .5;
static_cast<views::WidgetWin*>(popup_)->SetOpacity(
static_cast<BYTE>(animation_.GetCurrentValue() * scale * 255.0));
popup_->GetRootView()->SchedulePaint();
#else
NOTIMPLEMENTED();
#endif
}
private:
// DraggedTabController that created us.
DraggedTabController* controller_;
// Window we're showing.
views::Widget* popup_;
// NativeView of |popup_|. We cache this to avoid the possibility of
// invoking a method on popup_ after we close it.
gfx::NativeView popup_view_;
// Animation for when first made visible.
SlideAnimation animation_;
// Have we been hidden?
bool hidden_;
// Value of DockInfo::in_enable_area.
bool in_enable_area_;
};
///////////////////////////////////////////////////////////////////////////////
// DraggedTabController, public:
DraggedTabController::DraggedTabController(BaseTab* source_tab,
BaseTabStrip* source_tabstrip)
: dragged_contents_(NULL),
original_delegate_(NULL),
source_tabstrip_(source_tabstrip),
source_model_index_(source_tabstrip->GetModelIndexOfBaseTab(source_tab)),
attached_tabstrip_(NULL),
attached_tab_(NULL),
offset_to_width_ratio_(0),
old_focused_view_(NULL),
last_move_screen_loc_(0),
mini_(source_tab->data().mini),
pinned_(source_tabstrip->IsTabPinned(source_tab)),
started_drag_(false),
active_(true) {
instance_ = this;
SetDraggedContents(
GetModel(source_tabstrip_)->GetTabContentsAt(source_model_index_));
// Listen for Esc key presses.
MessageLoopForUI::current()->AddObserver(this);
}
DraggedTabController::~DraggedTabController() {
if (instance_ == this)
instance_ = NULL;
MessageLoopForUI::current()->RemoveObserver(this);
// Need to delete the view here manually _before_ we reset the dragged
// contents to NULL, otherwise if the view is animating to its destination
// bounds, it won't be able to clean up properly since its cleanup routine
// uses GetIndexForDraggedContents, which will be invalid.
view_.reset(NULL);
SetDraggedContents(NULL); // This removes our observer.
}
// static
bool DraggedTabController::IsAttachedTo(BaseTabStrip* tab_strip) {
return instance_ && instance_->active_ &&
instance_->attached_tabstrip_ == tab_strip;
}
void DraggedTabController::CaptureDragInfo(views::View* tab,
const gfx::Point& mouse_offset) {
if (tab->width() > 0) {
offset_to_width_ratio_ = static_cast<float>(mouse_offset.x()) /
static_cast<float>(tab->width());
}
start_screen_point_ = GetCursorScreenPoint();
mouse_offset_ = mouse_offset;
InitWindowCreatePoint();
}
void DraggedTabController::Drag() {
bring_to_front_timer_.Stop();
// Before we get to dragging anywhere, ensure that we consider ourselves
// attached to the source tabstrip.
if (!started_drag_ && CanStartDrag()) {
started_drag_ = true;
SaveFocus();
Attach(source_tabstrip_, gfx::Point());
}
if (started_drag_)
ContinueDragging();
}
void DraggedTabController::EndDrag(bool canceled) {
EndDragImpl(canceled ? CANCELED : NORMAL);
}
///////////////////////////////////////////////////////////////////////////////
// DraggedTabController, PageNavigator implementation:
void DraggedTabController::OpenURLFromTab(TabContents* source,
const GURL& url,
const GURL& referrer,
WindowOpenDisposition disposition,
PageTransition::Type transition) {
if (original_delegate_) {
if (disposition == CURRENT_TAB)
disposition = NEW_WINDOW;
original_delegate_->OpenURLFromTab(source, url, referrer,
disposition, transition);
}
}
///////////////////////////////////////////////////////////////////////////////
// DraggedTabController, TabContentsDelegate implementation:
void DraggedTabController::NavigationStateChanged(const TabContents* source,
unsigned changed_flags) {
if (view_.get())
view_->Update();
}
void DraggedTabController::AddNewContents(TabContents* source,
TabContents* new_contents,
WindowOpenDisposition disposition,
const gfx::Rect& initial_pos,
bool user_gesture) {
DCHECK(disposition != CURRENT_TAB);
// Theoretically could be called while dragging if the page tries to
// spawn a window. Route this message back to the browser in most cases.
if (original_delegate_) {
original_delegate_->AddNewContents(source, new_contents, disposition,
initial_pos, user_gesture);
}
}
void DraggedTabController::ActivateContents(TabContents* contents) {
// Ignored.
}
void DraggedTabController::DeactivateContents(TabContents* contents) {
// Ignored.
}
void DraggedTabController::LoadingStateChanged(TabContents* source) {
// It would be nice to respond to this message by changing the
// screen shot in the dragged tab.
if (view_.get())
view_->Update();
}
void DraggedTabController::CloseContents(TabContents* source) {
// Theoretically could be called by a window. Should be ignored
// because window.close() is ignored (usually, even though this
// method gets called.)
}
void DraggedTabController::MoveContents(TabContents* source,
const gfx::Rect& pos) {
// Theoretically could be called by a web page trying to move its
// own window. Should be ignored since we're moving the window...
}
void DraggedTabController::ToolbarSizeChanged(TabContents* source,
bool finished) {
// Dragged tabs don't care about this.
}
void DraggedTabController::URLStarredChanged(TabContents* source,
bool starred) {
// Ignored.
}
void DraggedTabController::UpdateTargetURL(TabContents* source,
const GURL& url) {
// Ignored.
}
///////////////////////////////////////////////////////////////////////////////
// DraggedTabController, NotificationObserver implementation:
void DraggedTabController::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK(type == NotificationType::TAB_CONTENTS_DESTROYED);
DCHECK(Source<TabContents>(source).ptr() == dragged_contents_);
EndDragImpl(TAB_DESTROYED);
}
///////////////////////////////////////////////////////////////////////////////
// DraggedTabController, MessageLoop::Observer implementation:
#if defined(OS_WIN)
void DraggedTabController::WillProcessMessage(const MSG& msg) {
}
void DraggedTabController::DidProcessMessage(const MSG& msg) {
// If the user presses ESC during a drag, we need to abort and revert things
// to the way they were. This is the most reliable way to do this since no
// single view or window reliably receives events throughout all the various
// kinds of tab dragging.
if (msg.message == WM_KEYDOWN && msg.wParam == VK_ESCAPE)
EndDrag(true);
}
#else
void DraggedTabController::WillProcessEvent(GdkEvent* event) {
}
void DraggedTabController::DidProcessEvent(GdkEvent* event) {
if (event->type == GDK_KEY_PRESS &&
reinterpret_cast<GdkEventKey*>(event)->keyval == GDK_Escape) {
EndDrag(true);
}
}
#endif
///////////////////////////////////////////////////////////////////////////////
// DraggedTabController, private:
void DraggedTabController::InitWindowCreatePoint() {
// window_create_point_ is only used in CompleteDrag() (through
// GetWindowCreatePoint() to get the start point of the docked window) when
// the attached_tabstrip_ is NULL and all the window's related bound
// information are obtained from source_tabstrip_. So, we need to get the
// first_tab based on source_tabstrip_, not attached_tabstrip_. Otherwise,
// the window_create_point_ is not in the correct coordinate system. Please
// refer to http://crbug.com/6223 comment #15 for detailed information.
views::View* first_tab = source_tabstrip_->base_tab_at_tab_index(0);
views::View::ConvertPointToWidget(first_tab, &first_source_tab_point_);
UpdateWindowCreatePoint();
}
void DraggedTabController::UpdateWindowCreatePoint() {
// See comments in InitWindowCreatePoint for details on this.
window_create_point_ = first_source_tab_point_;
window_create_point_.Offset(mouse_offset_.x(), mouse_offset_.y());
}
gfx::Point DraggedTabController::GetWindowCreatePoint() const {
gfx::Point cursor_point = GetCursorScreenPoint();
if (dock_info_.type() != DockInfo::NONE) {
// If we're going to dock, we need to return the exact coordinate,
// otherwise we may attempt to maximize on the wrong monitor.
return cursor_point;
}
return gfx::Point(cursor_point.x() - window_create_point_.x(),
cursor_point.y() - window_create_point_.y());
}
void DraggedTabController::UpdateDockInfo(const gfx::Point& screen_point) {
// Update the DockInfo for the current mouse coordinates.
DockInfo dock_info = GetDockInfoAtPoint(screen_point);
if (source_tabstrip_->type() == BaseTabStrip::VERTICAL_TAB_STRIP &&
((dock_info.type() == DockInfo::LEFT_OF_WINDOW &&
!base::i18n::IsRTL()) ||
(dock_info.type() == DockInfo::RIGHT_OF_WINDOW &&
base::i18n::IsRTL()))) {
// For side tabs it's way to easy to trigger to docking along the left/right
// edge, so we disable it.
dock_info = DockInfo();
}
if (!dock_info.equals(dock_info_)) {
// DockInfo for current position differs.
if (dock_info_.type() != DockInfo::NONE &&
!dock_controllers_.empty()) {
// Hide old visual indicator.
dock_controllers_.back()->Hide();
}
dock_info_ = dock_info;
if (dock_info_.type() != DockInfo::NONE) {
// Show new docking position.
DockDisplayer* controller = new DockDisplayer(this, dock_info_);
if (controller->popup_view()) {
dock_controllers_.push_back(controller);
dock_windows_.insert(controller->popup_view());
} else {
delete controller;
}
}
} else if (dock_info_.type() != DockInfo::NONE &&
!dock_controllers_.empty()) {
// Current dock position is the same as last, update the controller's
// in_enable_area state as it may have changed.
dock_controllers_.back()->UpdateInEnabledArea(dock_info_.in_enable_area());
}
}
void DraggedTabController::SetDraggedContents(TabContents* new_contents) {
if (dragged_contents_) {
registrar_.Remove(this,
NotificationType::TAB_CONTENTS_DESTROYED,
Source<TabContents>(dragged_contents_));
if (original_delegate_)
dragged_contents_->set_delegate(original_delegate_);
}
original_delegate_ = NULL;
dragged_contents_ = new_contents;
if (dragged_contents_) {
registrar_.Add(this,
NotificationType::TAB_CONTENTS_DESTROYED,
Source<TabContents>(dragged_contents_));
// We need to be the delegate so we receive messages about stuff,
// otherwise our dragged_contents() may be replaced and subsequently
// collected/destroyed while the drag is in process, leading to
// nasty crashes.
original_delegate_ = dragged_contents_->delegate();
dragged_contents_->set_delegate(this);
}
}
void DraggedTabController::SaveFocus() {
if (!old_focused_view_) {
old_focused_view_ = source_tabstrip_->GetRootView()->GetFocusedView();
source_tabstrip_->GetRootView()->FocusView(source_tabstrip_);
}
}
void DraggedTabController::RestoreFocus() {
if (old_focused_view_ && attached_tabstrip_ == source_tabstrip_)
old_focused_view_->GetRootView()->FocusView(old_focused_view_);
old_focused_view_ = NULL;
}
bool DraggedTabController::CanStartDrag() const {
// Determine if the mouse has moved beyond a minimum elasticity distance in
// any direction from the starting point.
static const int kMinimumDragDistance = 10;
gfx::Point screen_point = GetCursorScreenPoint();
int x_offset = abs(screen_point.x() - start_screen_point_.x());
int y_offset = abs(screen_point.y() - start_screen_point_.y());
return sqrt(pow(static_cast<float>(x_offset), 2) +
pow(static_cast<float>(y_offset), 2)) > kMinimumDragDistance;
}
void DraggedTabController::ContinueDragging() {
// Note that the coordinates given to us by |drag_event| are basically
// useless, since they're in source_tab_ coordinates. On the surface, you'd
// think we could just convert them to screen coordinates, however in the
// situation where we're dragging the last tab in a window when multiple
// windows are open, the coordinates of |source_tab_| are way off in
// hyperspace since the window was moved there instead of being closed so
// that we'd keep receiving events. And our ConvertPointToScreen methods
// aren't really multi-screen aware. So really it's just safer to get the
// actual position of the mouse cursor directly from Windows here, which is
// guaranteed to be correct regardless of monitor config.
gfx::Point screen_point = GetCursorScreenPoint();
#if defined(OS_CHROMEOS)
// We don't allow detaching in chrome os.
BaseTabStrip* target_tabstrip = source_tabstrip_;
#else
// Determine whether or not we have dragged over a compatible TabStrip in
// another browser window. If we have, we should attach to it and start
// dragging within it.
BaseTabStrip* target_tabstrip = GetTabStripForPoint(screen_point);
#endif
if (target_tabstrip != attached_tabstrip_) {
// Make sure we're fully detached from whatever TabStrip we're attached to
// (if any).
if (attached_tabstrip_)
Detach();
if (target_tabstrip)
Attach(target_tabstrip, screen_point);
}
if (!target_tabstrip) {
bring_to_front_timer_.Start(
base::TimeDelta::FromMilliseconds(kBringToFrontDelay), this,
&DraggedTabController::BringWindowUnderMouseToFront);
}
UpdateDockInfo(screen_point);
if (attached_tabstrip_)
MoveAttachedTab(screen_point);
else
MoveDetachedTab(screen_point);
}
void DraggedTabController::MoveAttachedTab(const gfx::Point& screen_point) {
DCHECK(attached_tabstrip_);
DCHECK(!view_.get());
gfx::Point dragged_view_point = GetAttachedTabDragPoint(screen_point);
TabStripModel* attached_model = GetModel(attached_tabstrip_);
int from_index = attached_model->GetIndexOfTabContents(dragged_contents_);
int threshold = kVerticalMoveThreshold;
if (attached_tabstrip_->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) {
TabStrip* tab_strip = static_cast<TabStrip*>(attached_tabstrip_);
// Determine the horizontal move threshold. This is dependent on the width
// of tabs. The smaller the tabs compared to the standard size, the smaller
// the threshold.
double unselected, selected;
tab_strip->GetCurrentTabWidths(&unselected, &selected);
double ratio = unselected / Tab::GetStandardSize().width();
threshold = static_cast<int>(ratio * kHorizontalMoveThreshold);
}
// Update the model, moving the TabContents from one index to another. Do this
// only if we have moved a minimum distance since the last reorder (to prevent
// jitter).
if (abs(MajorAxisValue(screen_point, attached_tabstrip_) -
last_move_screen_loc_) > threshold) {
gfx::Point dragged_view_screen_point(dragged_view_point);
views::View::ConvertPointToScreen(attached_tabstrip_,
&dragged_view_screen_point);
gfx::Rect bounds = GetDraggedViewTabStripBounds(dragged_view_screen_point);
int to_index = GetInsertionIndexForDraggedBounds(bounds, true);
to_index = NormalizeIndexToAttachedTabStrip(to_index);
if (from_index != to_index) {
last_move_screen_loc_ = MajorAxisValue(screen_point, attached_tabstrip_);
attached_model->MoveTabContentsAt(from_index, to_index, true);
}
}
attached_tab_->SchedulePaint();
attached_tab_->SetX(dragged_view_point.x());
attached_tab_->SetX(
attached_tabstrip_->MirroredLeftPointForRect(attached_tab_->bounds()));
attached_tab_->SetY(dragged_view_point.y());
attached_tab_->SchedulePaint();
}
void DraggedTabController::MoveDetachedTab(const gfx::Point& screen_point) {
DCHECK(!attached_tabstrip_);
DCHECK(view_.get());
int x = screen_point.x() - mouse_offset_.x();
int y = screen_point.y() - mouse_offset_.y();
// Move the View. There are no changes to the model if we're detached.
view_->MoveTo(gfx::Point(x, y));
}
DockInfo DraggedTabController::GetDockInfoAtPoint(
const gfx::Point& screen_point) {
if (attached_tabstrip_) {
// If the mouse is over a tab strip, don't offer a dock position.
return DockInfo();
}
if (dock_info_.IsValidForPoint(screen_point)) {
// It's possible any given screen coordinate has multiple docking
// positions. Check the current info first to avoid having the docking
// position bounce around.
return dock_info_;
}
gfx::NativeView dragged_hwnd = view_->GetWidget()->GetNativeView();
dock_windows_.insert(dragged_hwnd);
DockInfo info = DockInfo::GetDockInfoAtPoint(screen_point, dock_windows_);
dock_windows_.erase(dragged_hwnd);
return info;
}
BaseTabStrip* DraggedTabController::GetTabStripForPoint(
const gfx::Point& screen_point) {
gfx::NativeView dragged_view = NULL;
if (view_.get()) {
dragged_view = view_->GetWidget()->GetNativeView();
dock_windows_.insert(dragged_view);
}
gfx::NativeWindow local_window =
DockInfo::GetLocalProcessWindowAtPoint(screen_point, dock_windows_);
if (dragged_view)
dock_windows_.erase(dragged_view);
if (!local_window)
return NULL;
BrowserView* browser =
BrowserView::GetBrowserViewForNativeWindow(local_window);
// We don't allow drops on windows that don't have tabstrips.
if (!browser ||
!browser->browser()->SupportsWindowFeature(Browser::FEATURE_TABSTRIP))
return NULL;
BaseTabStrip* other_tabstrip = browser->tabstrip();
if (!other_tabstrip->controller()->IsCompatibleWith(source_tabstrip_))
return NULL;
return GetTabStripIfItContains(other_tabstrip, screen_point);
}
BaseTabStrip* DraggedTabController::GetTabStripIfItContains(
BaseTabStrip* tabstrip, const gfx::Point& screen_point) const {
static const int kVerticalDetachMagnetism = 15;
static const int kHorizontalDetachMagnetism = 15;
// Make sure the specified screen point is actually within the bounds of the
// specified tabstrip...
gfx::Rect tabstrip_bounds = GetViewScreenBounds(tabstrip);
if (tabstrip->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) {
if (screen_point.x() < tabstrip_bounds.right() &&
screen_point.x() >= tabstrip_bounds.x()) {
// TODO(beng): make this be relative to the start position of the mouse
// for the source TabStrip.
int upper_threshold = tabstrip_bounds.bottom() + kVerticalDetachMagnetism;
int lower_threshold = tabstrip_bounds.y() - kVerticalDetachMagnetism;
if (screen_point.y() >= lower_threshold &&
screen_point.y() <= upper_threshold) {
return tabstrip;
}
}
} else {
if (screen_point.y() < tabstrip_bounds.bottom() &&
screen_point.y() >= tabstrip_bounds.y()) {
int upper_threshold = tabstrip_bounds.right() +
kHorizontalDetachMagnetism;
int lower_threshold = tabstrip_bounds.x() - kHorizontalDetachMagnetism;
if (screen_point.x() >= lower_threshold &&
screen_point.x() <= upper_threshold) {
return tabstrip;
}
}
}
return NULL;
}
void DraggedTabController::Attach(BaseTabStrip* attached_tabstrip,
const gfx::Point& screen_point) {
DCHECK(!attached_tabstrip_); // We should already have detached by the time
// we get here.
DCHECK(!attached_tab_); // Similarly there should be no attached tab.
attached_tabstrip_ = attached_tabstrip;
// We don't need the photo-booth while we're attached.
photobooth_.reset(NULL);
// And we don't need the dragged view.
view_.reset();
BaseTab* tab = GetTabMatchingDraggedContents(attached_tabstrip_);
if (!tab) {
// There is no Tab in |attached_tabstrip| that corresponds to the dragged
// TabContents. We must now create one.
// Remove ourselves as the delegate now that the dragged TabContents is
// being inserted back into a Browser.
dragged_contents_->set_delegate(NULL);
original_delegate_ = NULL;
// Return the TabContents' to normalcy.
dragged_contents_->set_capturing_contents(false);
// Inserting counts as a move. We don't want the tabs to jitter when the
// user moves the tab immediately after attaching it.
last_move_screen_loc_ = MajorAxisValue(screen_point, attached_tabstrip);
// Figure out where to insert the tab based on the bounds of the dragged
// representation and the ideal bounds of the other Tabs already in the
// strip. ("ideal bounds" are stable even if the Tabs' actual bounds are
// changing due to animation).
gfx::Rect bounds = GetDraggedViewTabStripBounds(screen_point);
int index = GetInsertionIndexForDraggedBounds(bounds, false);
attached_tabstrip_->set_attaching_dragged_tab(true);
GetModel(attached_tabstrip_)->InsertTabContentsAt(
index, dragged_contents_,
TabStripModel::ADD_SELECTED |
(pinned_ ? TabStripModel::ADD_PINNED : 0));
attached_tabstrip_->set_attaching_dragged_tab(false);
tab = GetTabMatchingDraggedContents(attached_tabstrip_);
}
DCHECK(tab); // We should now have a tab.
attached_tab_ = tab;
attached_tabstrip_->StartedDraggingTab(tab);
if (attached_tabstrip_->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) {
// The size of the dragged tab may have changed. Adjust the x offset so that
// ratio of mouse_offset_ to original width is maintained.
mouse_offset_.set_x(static_cast<int>(offset_to_width_ratio_ *
static_cast<int>(tab->width())));
}
// Move the corresponding window to the front.
attached_tabstrip_->GetWindow()->Activate();
}
void DraggedTabController::Detach() {
// Prevent the TabContents' HWND from being hidden by any of the model
// operations performed during the drag.
dragged_contents_->set_capturing_contents(true);
// Update the Model.
TabRendererData tab_data = attached_tab_->data();
TabStripModel* attached_model = GetModel(attached_tabstrip_);
int index = attached_model->GetIndexOfTabContents(dragged_contents_);
DCHECK(index != -1);
// Hide the tab so that the user doesn't see it animate closed.
attached_tab_->SetVisible(false);
int attached_tab_width = attached_tab_->width();
attached_model->DetachTabContentsAt(index);
// Detaching may end up deleting the tab, drop references to it.
attached_tab_ = NULL;
// If we've removed the last Tab from the TabStrip, hide the frame now.
if (attached_model->empty())
HideFrame();
// Set up the photo booth to start capturing the contents of the dragged
// TabContents.
if (!photobooth_.get()) {
photobooth_.reset(
NativeViewPhotobooth::Create(dragged_contents_->GetNativeView()));
}
// Create the dragged view.
EnsureDraggedView(tab_data);
view_->SetTabWidthAndUpdate(attached_tab_width, photobooth_.get());
// Detaching resets the delegate, but we still want to be the delegate.
dragged_contents_->set_delegate(this);
attached_tabstrip_ = NULL;
}
int DraggedTabController::GetInsertionIndexForDraggedBounds(
const gfx::Rect& dragged_bounds,
bool is_tab_attached) const {
int right_tab_x = 0;
int bottom_tab_y = 0;
// If the UI layout of the tab strip is right-to-left, we need to mirror the
// bounds of the dragged tab before performing the drag/drop related
// calculations. We mirror the dragged bounds because we determine the
// position of each tab on the tab strip by calling GetBounds() (without the
// mirroring transformation flag) which effectively means that even though
// the tabs are rendered from right to left, the code performs the
// calculation as if the tabs are laid out from left to right. Mirroring the
// dragged bounds adjusts the coordinates of the tab we are dragging so that
// it uses the same orientation used by the tabs on the tab strip.
gfx::Rect adjusted_bounds(dragged_bounds);
adjusted_bounds.set_x(
attached_tabstrip_->MirroredLeftPointForRect(adjusted_bounds));
int index = -1;
for (int i = 0; i < attached_tabstrip_->tab_count(); ++i) {
const gfx::Rect& ideal_bounds = attached_tabstrip_->ideal_bounds(i);
if (attached_tabstrip_->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) {
gfx::Rect left_half = ideal_bounds;
left_half.set_width(left_half.width() / 2);
gfx::Rect right_half = ideal_bounds;
right_half.set_width(ideal_bounds.width() - left_half.width());
right_half.set_x(left_half.right());
right_tab_x = right_half.right();
if (adjusted_bounds.x() >= right_half.x() &&
adjusted_bounds.x() < right_half.right()) {
index = i + 1;
break;
} else if (adjusted_bounds.x() >= left_half.x() &&
adjusted_bounds.x() < left_half.right()) {
index = i;
break;
}
} else {
// Vertical tab strip.
int max_y = ideal_bounds.bottom();
int mid_y = ideal_bounds.y() + ideal_bounds.height() / 2;
bottom_tab_y = max_y;
if (adjusted_bounds.y() < mid_y) {
index = i;
break;
} else if (adjusted_bounds.y() >= mid_y && adjusted_bounds.y() < max_y) {
index = i + 1;
break;
}
}
}
if (index == -1) {
if ((attached_tabstrip_->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP &&
adjusted_bounds.right() > right_tab_x) ||
(attached_tabstrip_->type() == BaseTabStrip::VERTICAL_TAB_STRIP &&
adjusted_bounds.y() >= bottom_tab_y)) {
index = GetModel(attached_tabstrip_)->count();
} else {
index = 0;
}
}
index = GetModel(attached_tabstrip_)->ConstrainInsertionIndex(index, mini_);
if (is_tab_attached && mini_ &&
index == GetModel(attached_tabstrip_)->IndexOfFirstNonMiniTab()) {
index--;
}
return index;
}
gfx::Rect DraggedTabController::GetDraggedViewTabStripBounds(
const gfx::Point& screen_point) {
gfx::Point client_point =
ConvertScreenPointToTabStripPoint(attached_tabstrip_, screen_point);
// attached_tab_ is NULL when inserting into a new tabstrip.
if (attached_tab_) {
return gfx::Rect(client_point.x(), client_point.y(),
attached_tab_->width(), attached_tab_->height());
}
if (attached_tabstrip_->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) {
double sel_width, unselected_width;
static_cast<TabStrip*>(attached_tabstrip_)->GetCurrentTabWidths(
&sel_width, &unselected_width);
return gfx::Rect(client_point.x(), client_point.y(),
static_cast<int>(sel_width),
Tab::GetStandardSize().height());
}
return gfx::Rect(client_point.x(), client_point.y(),
attached_tabstrip_->width(),
SideTab::GetPreferredHeight());
}
gfx::Point DraggedTabController::GetAttachedTabDragPoint(
const gfx::Point& screen_point) {
DCHECK(attached_tabstrip_); // The tab must be attached.
int x = screen_point.x() - mouse_offset_.x();
int y = screen_point.y() - mouse_offset_.y();
gfx::Point tab_loc(x, y);
views::View::ConvertPointToView(NULL, attached_tabstrip_, &tab_loc);
x = tab_loc.x();
y = tab_loc.y();
const gfx::Size& tab_size = attached_tab_->bounds().size();
if (attached_tabstrip_->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) {
int max_x = attached_tabstrip_->bounds().right() - tab_size.width();
x = std::min(std::max(x, 0), max_x);
y = 0;
} else {
x = SideTabStrip::kTabStripInset;
int max_y = attached_tabstrip_->bounds().bottom() - tab_size.height();
y = std::min(std::max(y, SideTabStrip::kTabStripInset), max_y);
}
return gfx::Point(x, y);
}
BaseTab* DraggedTabController::GetTabMatchingDraggedContents(
BaseTabStrip* tabstrip) const {
int model_index =
GetModel(tabstrip)->GetIndexOfTabContents(dragged_contents_);
return model_index == TabStripModel::kNoTab ?
NULL : tabstrip->GetBaseTabAtModelIndex(model_index);
}
void DraggedTabController::EndDragImpl(EndDragType type) {
// WARNING: this may be invoked multiple times. In particular, if deletion
// occurs after a delay (as it does when the tab is released in the original
// tab strip) and the navigation controller/tab contents is deleted before
// the animation finishes, this is invoked twice. The second time through
// type == TAB_DESTROYED.
active_ = false;
bring_to_front_timer_.Stop();
// Hide the current dock controllers.
for (size_t i = 0; i < dock_controllers_.size(); ++i) {
// Be sure and clear the controller first, that way if Hide ends up
// deleting the controller it won't call us back.
dock_controllers_[i]->clear_controller();
dock_controllers_[i]->Hide();
}
dock_controllers_.clear();
dock_windows_.clear();
if (type != TAB_DESTROYED) {
// We only finish up the drag if we were actually dragging. If start_drag_
// is false, the user just clicked and released and didn't move the mouse
// enough to trigger a drag.
if (started_drag_) {
RestoreFocus();
if (type == CANCELED)
RevertDrag();
else
CompleteDrag();
}
if (dragged_contents_ && dragged_contents_->delegate() == this)
dragged_contents_->set_delegate(original_delegate_);
} else {
// If we get here it means the NavigationController is going down. Don't
// attempt to do any cleanup other than resetting the delegate (if we're
// still the delegate).
if (dragged_contents_ && dragged_contents_->delegate() == this)
dragged_contents_->set_delegate(NULL);
dragged_contents_ = NULL;
}
// The delegate of the dragged contents should have been reset. Unset the
// original delegate so that we don't attempt to reset the delegate when
// deleted.
DCHECK(!dragged_contents_ || dragged_contents_->delegate() != this);
original_delegate_ = NULL;
source_tabstrip_->DestroyDragController();
}
void DraggedTabController::RevertDrag() {
DCHECK(started_drag_);
// We save this here because code below will modify |attached_tabstrip_|.
bool restore_frame = attached_tabstrip_ != source_tabstrip_;
if (attached_tabstrip_) {
int index = GetModel(attached_tabstrip_)->GetIndexOfTabContents(
dragged_contents_);
if (attached_tabstrip_ != source_tabstrip_) {
// The Tab was inserted into another TabStrip. We need to put it back
// into the original one.
GetModel(attached_tabstrip_)->DetachTabContentsAt(index);
// TODO(beng): (Cleanup) seems like we should use Attach() for this
// somehow.
attached_tabstrip_ = source_tabstrip_;
GetModel(source_tabstrip_)->InsertTabContentsAt(
source_model_index_, dragged_contents_,
TabStripModel::ADD_SELECTED |
(pinned_ ? TabStripModel::ADD_PINNED : 0));
} else {
// The Tab was moved within the TabStrip where the drag was initiated.
// Move it back to the starting location.
GetModel(source_tabstrip_)->MoveTabContentsAt(index, source_model_index_,
true);
source_tabstrip_->StoppedDraggingTab(attached_tab_);
}
} else {
// TODO(beng): (Cleanup) seems like we should use Attach() for this
// somehow.
attached_tabstrip_ = source_tabstrip_;
// The Tab was detached from the TabStrip where the drag began, and has not
// been attached to any other TabStrip. We need to put it back into the
// source TabStrip.
GetModel(source_tabstrip_)->InsertTabContentsAt(
source_model_index_, dragged_contents_,
TabStripModel::ADD_SELECTED |
(pinned_ ? TabStripModel::ADD_PINNED : 0));
}
// If we're not attached to any TabStrip, or attached to some other TabStrip,
// we need to restore the bounds of the original TabStrip's frame, in case
// it has been hidden.
if (restore_frame) {
if (!restore_bounds_.IsEmpty()) {
#if defined(OS_WIN)
HWND frame_hwnd = source_tabstrip_->GetWidget()->GetNativeView();
MoveWindow(frame_hwnd, restore_bounds_.x(), restore_bounds_.y(),
restore_bounds_.width(), restore_bounds_.height(), TRUE);
#else
NOTIMPLEMENTED();
#endif
}
}
}
void DraggedTabController::CompleteDrag() {
DCHECK(started_drag_);
if (attached_tabstrip_) {
attached_tabstrip_->StoppedDraggingTab(attached_tab_);
} else {
if (dock_info_.type() != DockInfo::NONE) {
Profile* profile = GetModel(source_tabstrip_)->profile();
switch (dock_info_.type()) {
case DockInfo::LEFT_OF_WINDOW:
UserMetrics::RecordAction(UserMetricsAction("DockingWindow_Left"),
profile);
break;
case DockInfo::RIGHT_OF_WINDOW:
UserMetrics::RecordAction(UserMetricsAction("DockingWindow_Right"),
profile);
break;
case DockInfo::BOTTOM_OF_WINDOW:
UserMetrics::RecordAction(UserMetricsAction("DockingWindow_Bottom"),
profile);
break;
case DockInfo::TOP_OF_WINDOW:
UserMetrics::RecordAction(UserMetricsAction("DockingWindow_Top"),
profile);
break;
case DockInfo::MAXIMIZE:
UserMetrics::RecordAction(UserMetricsAction("DockingWindow_Maximize"),
profile);
break;
case DockInfo::LEFT_HALF:
UserMetrics::RecordAction(UserMetricsAction("DockingWindow_LeftHalf"),
profile);
break;
case DockInfo::RIGHT_HALF:
UserMetrics::RecordAction(
UserMetricsAction("DockingWindow_RightHalf"),
profile);
break;
case DockInfo::BOTTOM_HALF:
UserMetrics::RecordAction(
UserMetricsAction("DockingWindow_BottomHalf"),
profile);
break;
default:
NOTREACHED();
break;
}
}
// Compel the model to construct a new window for the detached TabContents.
views::Window* window = source_tabstrip_->GetWindow();
gfx::Rect window_bounds(window->GetNormalBounds());
window_bounds.set_origin(GetWindowCreatePoint());
// When modifying the following if statement, please make sure not to
// introduce issue listed in http://crbug.com/6223 comment #11.
bool rtl_ui = base::i18n::IsRTL();
bool has_dock_position = (dock_info_.type() != DockInfo::NONE);
if (rtl_ui && has_dock_position) {
// Mirror X axis so the docked tab is aligned using the mouse click as
// the top-right corner.
window_bounds.set_x(window_bounds.x() - window_bounds.width());
}
Browser* new_browser =
GetModel(source_tabstrip_)->delegate()->CreateNewStripWithContents(
dragged_contents_, window_bounds, dock_info_, window->IsMaximized());
TabStripModel* new_model = new_browser->tabstrip_model();
new_model->SetTabPinned(new_model->GetIndexOfTabContents(dragged_contents_),
pinned_);
new_browser->window()->Show();
}
CleanUpHiddenFrame();
}
void DraggedTabController::EnsureDraggedView(const TabRendererData& data) {
if (!view_.get()) {
gfx::Rect tab_bounds;
dragged_contents_->GetContainerBounds(&tab_bounds);
BaseTab* renderer = source_tabstrip_->CreateTabForDragging();
renderer->SetData(data);
// DraggedTabView takes ownership of renderer.
view_.reset(new DraggedTabView(renderer, mouse_offset_,
tab_bounds.size(),
Tab::GetMinimumSelectedSize()));
}
}
gfx::Point DraggedTabController::GetCursorScreenPoint() const {
#if defined(OS_WIN)
DWORD pos = GetMessagePos();
return gfx::Point(pos);
#else
gint x, y;
gdk_display_get_pointer(gdk_display_get_default(), NULL, &x, &y, NULL);
return gfx::Point(x, y);
#endif
}
gfx::Rect DraggedTabController::GetViewScreenBounds(views::View* view) const {
gfx::Point view_topleft;
views::View::ConvertPointToScreen(view, &view_topleft);
gfx::Rect view_screen_bounds = view->GetLocalBounds(true);
view_screen_bounds.Offset(view_topleft.x(), view_topleft.y());
return view_screen_bounds;
}
int DraggedTabController::NormalizeIndexToAttachedTabStrip(int index) const {
DCHECK(attached_tabstrip_) << "Can only be called when attached!";
TabStripModel* attached_model = GetModel(attached_tabstrip_);
if (index >= attached_model->count())
return attached_model->count() - 1;
if (index == TabStripModel::kNoTab)
return 0;
return index;
}
void DraggedTabController::HideFrame() {
#if defined(OS_WIN)
// We don't actually hide the window, rather we just move it way off-screen.
// If we actually hide it, we stop receiving drag events.
HWND frame_hwnd = source_tabstrip_->GetWidget()->GetNativeView();
RECT wr;
GetWindowRect(frame_hwnd, &wr);
MoveWindow(frame_hwnd, 0xFFFF, 0xFFFF, wr.right - wr.left,
wr.bottom - wr.top, TRUE);
// We also save the bounds of the window prior to it being moved, so that if
// the drag session is aborted we can restore them.
restore_bounds_ = gfx::Rect(wr);
#else
NOTIMPLEMENTED();
#endif
}
void DraggedTabController::CleanUpHiddenFrame() {
// If the model we started dragging from is now empty, we must ask the
// delegate to close the frame.
if (GetModel(source_tabstrip_)->empty())
GetModel(source_tabstrip_)->delegate()->CloseFrameAfterDragSession();
}
void DraggedTabController::DockDisplayerDestroyed(
DockDisplayer* controller) {
DockWindows::iterator dock_i =
dock_windows_.find(controller->popup_view());
if (dock_i != dock_windows_.end())
dock_windows_.erase(dock_i);
else
NOTREACHED();
std::vector<DockDisplayer*>::iterator i =
std::find(dock_controllers_.begin(), dock_controllers_.end(),
controller);
if (i != dock_controllers_.end())
dock_controllers_.erase(i);
else
NOTREACHED();
}
void DraggedTabController::BringWindowUnderMouseToFront() {
// If we're going to dock to another window, bring it to the front.
gfx::NativeWindow window = dock_info_.window();
if (!window) {
gfx::NativeView dragged_view = view_->GetWidget()->GetNativeView();
dock_windows_.insert(dragged_view);
window = DockInfo::GetLocalProcessWindowAtPoint(GetCursorScreenPoint(),
dock_windows_);
dock_windows_.erase(dragged_view);
}
if (window) {
#if defined(OS_WIN)
// Move the window to the front.
SetWindowPos(window, HWND_TOP, 0, 0, 0, 0,
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
// The previous call made the window appear on top of the dragged window,
// move the dragged window to the front.
SetWindowPos(view_->GetWidget()->GetNativeView(), HWND_TOP, 0, 0, 0, 0,
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
#else
NOTIMPLEMENTED();
#endif
}
}
TabStripModel* DraggedTabController::GetModel(BaseTabStrip* tabstrip) const {
return static_cast<BrowserTabStripController*>(tabstrip->controller())->
model();
}