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chromium / chromium / src / afa980943bd4876bcd9bd7e7e644f161b9bdcab1 / . / chrome / browser / ui / views / tabs / tab_drag_controller.cc
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// Copyright (c) 2012 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/views/tabs/tab_drag_controller.h"
#include <algorithm>
#include <limits>
#include <set>
#include <utility>
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/i18n/rtl.h"
#include "base/macros.h"
#include "base/numerics/ranges.h"
#include "base/stl_util.h"
#include "build/build_config.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/layout_constants.h"
#include "chrome/browser/ui/sad_tab_helper.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "chrome/browser/ui/views/tabs/tab.h"
#include "chrome/browser/ui/views/tabs/tab_strip.h"
#include "chrome/browser/ui/views/tabs/tab_strip_layout_helper.h"
#include "chrome/browser/ui/views/tabs/tab_style_views.h"
#include "chrome/browser/ui/views/tabs/window_finder.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/extension_function_dispatcher.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#include "ui/events/event_constants.h"
#include "ui/events/gestures/gesture_recognizer.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/views/event_monitor.h"
#include "ui/views/view_tracker.h"
#include "ui/views/widget/root_view.h"
#include "ui/views/widget/widget.h"
#if defined(OS_CHROMEOS)
#include "ash/public/cpp/ash_features.h"
#include "ash/public/cpp/window_properties.h" // nogncheck
#include "ash/public/cpp/window_state_type.h" // nogncheck
#include "chrome/browser/ui/ash/tablet_mode_client.h"
#include "ui/wm/core/coordinate_conversion.h"
#endif
#if defined(USE_AURA)
#include "ui/aura/env.h" // nogncheck
#include "ui/aura/window.h" // nogncheck
#include "ui/wm/core/window_modality_controller.h" // nogncheck
#endif
using content::OpenURLParams;
using content::WebContents;
// If non-null there is a drag underway.
static TabDragController* g_tab_drag_controller = NULL;
namespace {
// Delay, in ms, during dragging before we bring a window to front.
const int kBringToFrontDelay = 750;
// Initial delay before moving tabs when the dragged tab is close to the edge of
// the stacked tabs.
const int kMoveAttachedInitialDelay = 600;
// Delay for moving tabs after the initial delay has passed.
const int kMoveAttachedSubsequentDelay = 300;
// A dragged window is forced to be a bit smaller than maximized bounds during a
// drag. This prevents the dragged browser widget from getting maximized at
// creation and makes it easier to drag tabs out of a restored window that had
// maximized size.
const int kMaximizedWindowInset = 10; // DIPs.
#if defined(OS_CHROMEOS)
// Returns the aura::Window which stores the window properties for tab-dragging.
aura::Window* GetWindowForTabDraggingProperties(const TabDragContext* context) {
return context ? context->AsView()->GetWidget()->GetNativeWindow() : nullptr;
}
// Returns true if |context| browser window is snapped.
bool IsSnapped(const TabDragContext* context) {
DCHECK(context);
ash::WindowStateType type =
GetWindowForTabDraggingProperties(context)->GetProperty(
ash::kWindowStateTypeKey);
return type == ash::WindowStateType::kLeftSnapped ||
type == ash::WindowStateType::kRightSnapped;
}
// In Chrome OS tablet mode, when dragging a tab/tabs around, the desired
// browser bounds during dragging is one-fourth of the workspace bounds.
gfx::Rect GetDraggedBrowserBoundsInTabletMode(aura::Window* window) {
const gfx::Rect work_area =
display::Screen::GetScreen()->GetDisplayNearestWindow(window).work_area();
gfx::Rect bounds(window->GetBoundsInScreen());
bounds.set_width(work_area.width() / 2);
bounds.set_height(work_area.height() / 2);
return bounds;
}
// Store the current window bounds if we're in Chrome OS tablet mode and tab
// dragging is allowed on browser windows.
void StoreCurrentDraggedBrowserBoundsInTabletMode(
aura::Window* window,
const gfx::Rect& bounds_in_screen) {
if (TabletModeClient::Get()->tablet_mode_enabled()) {
// The bounds that is stored in ash::kRestoreBoundsOverrideKey will be used
// by DragDetails to calculate the window bounds during dragging in tablet
// mode.
window->SetProperty(ash::kRestoreBoundsOverrideKey,
new gfx::Rect(bounds_in_screen));
}
}
// Returns true if |context| is currently showing in overview mode in Chrome
// OS.
bool IsShowingInOverview(TabDragContext* context) {
return context && GetWindowForTabDraggingProperties(context)->GetProperty(
ash::kIsShowingInOverviewKey);
}
// Returns true if we should attach the dragged tabs into |target_context|
// after the drag ends. Currently it only happens on Chrome OS, when the dragged
// tabs are dragged over an overview window, we should not try to attach it
// to the overview window during dragging, but should wait to do so until the
// drag ends.
bool ShouldAttachOnEnd(TabDragContext* target_context) {
return IsShowingInOverview(target_context);
}
// Returns true if |context| can detach from the current context and attach
// into another eligible browser window's context.
bool CanDetachFromTabStrip(TabDragContext* context) {
return context && GetWindowForTabDraggingProperties(context)->GetProperty(
ash::kCanAttachToAnotherWindowKey);
}
#else
bool IsSnapped(const TabDragContext* context) {
return false;
}
bool IsShowingInOverview(TabDragContext* context) {
return false;
}
bool ShouldAttachOnEnd(TabDragContext* target_context) {
return false;
}
bool CanDetachFromTabStrip(TabDragContext* context) {
return true;
}
#endif // #if defined(OS_CHROMEOS)
void SetCapture(TabDragContext* context) {
context->AsView()->GetWidget()->SetCapture(context->AsView());
}
gfx::Rect GetTabstripScreenBounds(const TabDragContext* context) {
const views::View* view = context->AsView();
gfx::Point view_topleft;
views::View::ConvertPointToScreen(view, &view_topleft);
gfx::Rect view_screen_bounds = view->GetLocalBounds();
view_screen_bounds.Offset(view_topleft.x(), view_topleft.y());
return view_screen_bounds;
}
// Returns true if |bounds| contains the y-coordinate |y|. The y-coordinate
// of |bounds| is adjusted by |vertical_adjustment|.
bool DoesRectContainVerticalPointExpanded(
const gfx::Rect& bounds,
int vertical_adjustment,
int y) {
int upper_threshold = bounds.bottom() + vertical_adjustment;
int lower_threshold = bounds.y() - vertical_adjustment;
return y >= lower_threshold && y <= upper_threshold;
}
// Adds |x_offset| to all the rectangles in |rects|.
void OffsetX(int x_offset, std::vector<gfx::Rect>* rects) {
if (x_offset == 0)
return;
for (size_t i = 0; i < rects->size(); ++i)
(*rects)[i].set_x((*rects)[i].x() + x_offset);
}
} // namespace
// KeyEventTracker installs an event monitor and runs a callback to end the drag
// when it receives any key event.
class KeyEventTracker : public ui::EventObserver {
public:
KeyEventTracker(base::OnceClosure end_drag_callback,
base::OnceClosure revert_drag_callback,
gfx::NativeWindow context)
: end_drag_callback_(std::move(end_drag_callback)),
revert_drag_callback_(std::move(revert_drag_callback)) {
event_monitor_ = views::EventMonitor::CreateApplicationMonitor(
this, context, {ui::ET_KEY_PRESSED});
}
~KeyEventTracker() override = default;
private:
// ui::EventObserver:
void OnEvent(const ui::Event& event) override {
if (event.AsKeyEvent()->key_code() == ui::VKEY_ESCAPE &&
revert_drag_callback_) {
std::move(revert_drag_callback_).Run();
} else if (event.AsKeyEvent()->key_code() != ui::VKEY_ESCAPE &&
end_drag_callback_) {
std::move(end_drag_callback_).Run();
}
}
base::OnceClosure end_drag_callback_;
base::OnceClosure revert_drag_callback_;
std::unique_ptr<views::EventMonitor> event_monitor_;
DISALLOW_COPY_AND_ASSIGN(KeyEventTracker);
};
class TabDragController::SourceTabStripEmptinessTracker
: public TabStripModelObserver {
public:
explicit SourceTabStripEmptinessTracker(TabStripModel* tabstrip,
TabDragController* parent)
: tab_strip_(tabstrip), parent_(parent), observer_(this) {
observer_.Add(tab_strip_);
}
private:
void TabStripEmpty() override {
observer_.Remove(tab_strip_);
parent_->OnSourceTabStripEmpty();
}
TabStripModel* const tab_strip_;
TabDragController* const parent_;
ScopedObserver<TabStripModel, TabStripModelObserver> observer_;
};
class TabDragController::DraggedTabsClosedTracker
: public TabStripModelObserver {
public:
DraggedTabsClosedTracker(TabStripModel* tabstrip, TabDragController* parent)
: parent_(parent), observer_(this) {
observer_.Add(tabstrip);
}
void OnTabStripModelChanged(
TabStripModel* model,
const TabStripModelChange& change,
const TabStripSelectionChange& selection) override {
if (change.type() != TabStripModelChange::Type::kRemoved)
return;
for (const auto& contents : change.GetRemove()->contents)
parent_->OnActiveStripWebContentsRemoved(contents.contents);
}
private:
TabDragController* const parent_;
ScopedObserver<TabStripModel, TabStripModelObserver> observer_;
};
TabDragController::TabDragData::TabDragData()
: contents(NULL),
source_model_index(-1),
attached_tab(NULL),
pinned(false) {
}
TabDragController::TabDragData::~TabDragData() {
}
TabDragController::TabDragData::TabDragData(TabDragData&&) = default;
#if defined(OS_CHROMEOS)
// The class to track the current deferred target tabstrip and also to observe
// its native window's property ash::kIsDeferredTabDraggingTargetWindowKey.
// The reason we need to observe the window property is the property might be
// cleared outside of TabDragController (i.e. by ash), and we should update the
// tracked deferred target tabstrip in this case.
class TabDragController::DeferredTargetTabstripObserver
: public aura::WindowObserver {
public:
DeferredTargetTabstripObserver() = default;
~DeferredTargetTabstripObserver() override {
if (deferred_target_context_) {
GetWindowForTabDraggingProperties(deferred_target_context_)
->RemoveObserver(this);
deferred_target_context_ = nullptr;
}
}
void SetDeferredTargetTabstrip(TabDragContext* deferred_target_context) {
if (deferred_target_context_ == deferred_target_context)
return;
// Clear the window property on the previous |deferred_target_context_|.
if (deferred_target_context_) {
aura::Window* old_window =
GetWindowForTabDraggingProperties(deferred_target_context_);
old_window->RemoveObserver(this);
old_window->ClearProperty(ash::kIsDeferredTabDraggingTargetWindowKey);
}
deferred_target_context_ = deferred_target_context;
// Set the window property on the new |deferred_target_context_|.
if (deferred_target_context_) {
aura::Window* new_window =
GetWindowForTabDraggingProperties(deferred_target_context_);
new_window->SetProperty(ash::kIsDeferredTabDraggingTargetWindowKey, true);
new_window->AddObserver(this);
}
}
// aura::WindowObserver:
void OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) override {
DCHECK_EQ(window,
GetWindowForTabDraggingProperties(deferred_target_context_));
if (key == ash::kIsDeferredTabDraggingTargetWindowKey &&
!window->GetProperty(ash::kIsDeferredTabDraggingTargetWindowKey)) {
SetDeferredTargetTabstrip(nullptr);
}
// else do nothing. currently it's only possible that ash clears the window
// property, but doesn't set the window property.
}
void OnWindowDestroying(aura::Window* window) override {
DCHECK_EQ(window,
GetWindowForTabDraggingProperties(deferred_target_context_));
SetDeferredTargetTabstrip(nullptr);
}
TabDragContext* deferred_target_context() { return deferred_target_context_; }
private:
TabDragContext* deferred_target_context_ = nullptr;
DISALLOW_COPY_AND_ASSIGN(DeferredTargetTabstripObserver);
};
#endif
///////////////////////////////////////////////////////////////////////////////
// TabDragController, public:
// static
const int TabDragController::kTouchVerticalDetachMagnetism = 50;
// static
const int TabDragController::kVerticalDetachMagnetism = 15;
TabDragController::TabDragController()
: current_state_(DragState::kNotStarted),
event_source_(EVENT_SOURCE_MOUSE),
source_context_(nullptr),
attached_context_(nullptr),
can_release_capture_(true),
offset_to_width_ratio_(0),
old_focused_view_tracker_(std::make_unique<views::ViewTracker>()),
last_move_screen_loc_(0),
source_tab_index_(std::numeric_limits<size_t>::max()),
initial_move_(true),
#if defined(USE_OZONE) && !defined(OS_CHROMEOS)
// TODO(crbug.com/896640): Support detachable tabs
detach_behavior_(NOT_DETACHABLE),
#else
detach_behavior_(DETACHABLE),
#endif
move_behavior_(REORDER),
mouse_has_ever_moved_left_(false),
mouse_has_ever_moved_right_(false),
is_dragging_new_browser_(false),
was_source_maximized_(false),
was_source_fullscreen_(false),
did_restore_window_(false),
tab_strip_to_attach_to_after_exit_(NULL),
move_loop_widget_(NULL),
is_mutating_(false),
attach_x_(-1),
attach_index_(-1),
weak_factory_(this) {
g_tab_drag_controller = this;
}
TabDragController::~TabDragController() {
if (g_tab_drag_controller == this)
g_tab_drag_controller = NULL;
if (move_loop_widget_)
move_loop_widget_->RemoveObserver(this);
if (is_dragging_window())
GetAttachedBrowserWidget()->EndMoveLoop();
if (event_source_ == EVENT_SOURCE_TOUCH) {
TabDragContext* capture_context =
attached_context_ ? attached_context_ : source_context_;
capture_context->AsView()->GetWidget()->ReleaseCapture();
}
}
void TabDragController::Init(TabDragContext* source_context,
Tab* source_tab,
const std::vector<Tab*>& tabs,
const gfx::Point& mouse_offset,
int source_tab_offset,
ui::ListSelectionModel initial_selection_model,
MoveBehavior move_behavior,
EventSource event_source) {
DCHECK(!tabs.empty());
DCHECK(base::Contains(tabs, source_tab));
source_context_ = source_context;
was_source_maximized_ = source_context->AsView()->GetWidget()->IsMaximized();
was_source_fullscreen_ =
source_context->AsView()->GetWidget()->IsFullscreen();
// Do not release capture when transferring capture between widgets on:
// - Desktop Linux
// Mouse capture is not synchronous on desktop Linux. Chrome makes
// transferring capture between widgets without releasing capture appear
// synchronous on desktop Linux, so use that.
// - Chrome OS
// Releasing capture on Ash cancels gestures so avoid it.
#if defined(OS_LINUX)
can_release_capture_ = false;
#endif
start_point_in_screen_ = gfx::Point(source_tab_offset, mouse_offset.y());
views::View::ConvertPointToScreen(source_tab, &start_point_in_screen_);
event_source_ = event_source;
mouse_offset_ = mouse_offset;
move_behavior_ = move_behavior;
last_point_in_screen_ = start_point_in_screen_;
last_move_screen_loc_ = start_point_in_screen_.x();
initial_tab_positions_ = source_context->GetTabXCoordinates();
source_context_emptiness_tracker_ =
std::make_unique<SourceTabStripEmptinessTracker>(
source_context_->GetTabStripModel(), this);
drag_data_.resize(tabs.size());
for (size_t i = 0; i < tabs.size(); ++i)
InitTabDragData(tabs[i], &(drag_data_[i]));
source_tab_index_ =
std::find(tabs.begin(), tabs.end(), source_tab) - tabs.begin();
// Listen for Esc key presses.
key_event_tracker_ = std::make_unique<KeyEventTracker>(
base::BindOnce(&TabDragController::EndDrag, base::Unretained(this),
END_DRAG_COMPLETE),
base::BindOnce(&TabDragController::EndDrag, base::Unretained(this),
END_DRAG_CANCEL),
source_context_->AsView()->GetWidget()->GetNativeWindow());
if (source_tab->width() > 0) {
offset_to_width_ratio_ =
float{source_tab->GetMirroredXInView(source_tab_offset)} /
float{source_tab->width()};
}
InitWindowCreatePoint();
initial_selection_model_ = std::move(initial_selection_model);
// Gestures don't automatically do a capture. We don't allow multiple drags at
// the same time, so we explicitly capture.
if (event_source == EVENT_SOURCE_TOUCH)
SetCapture(source_context_);
window_finder_ = std::make_unique<WindowFinder>();
}
// static
bool TabDragController::IsAttachedTo(const TabDragContext* context) {
return (g_tab_drag_controller && g_tab_drag_controller->active() &&
g_tab_drag_controller->attached_context() == context);
}
// static
bool TabDragController::IsActive() {
return g_tab_drag_controller && g_tab_drag_controller->active();
}
// static
TabDragContext* TabDragController::GetSourceContext() {
return g_tab_drag_controller ? g_tab_drag_controller->source_context_
: nullptr;
}
void TabDragController::SetMoveBehavior(MoveBehavior behavior) {
if (current_state_ == DragState::kNotStarted)
move_behavior_ = behavior;
}
bool TabDragController::IsDraggingTab(content::WebContents* contents) {
for (auto& drag_data : drag_data_) {
if (drag_data.contents == contents)
return true;
}
return false;
}
void TabDragController::Drag(const gfx::Point& point_in_screen) {
TRACE_EVENT1("views", "TabDragController::Drag",
"point_in_screen", point_in_screen.ToString());
bring_to_front_timer_.Stop();
move_stacked_timer_.Stop();
if (current_state_ == DragState::kWaitingToDragTabs ||
current_state_ == DragState::kWaitingToStop ||
current_state_ == DragState::kStopped)
return;
if (current_state_ == DragState::kNotStarted) {
if (!CanStartDrag(point_in_screen))
return; // User hasn't dragged far enough yet.
// On windows SaveFocus() may trigger a capture lost, which destroys us.
{
base::WeakPtr<TabDragController> ref(weak_factory_.GetWeakPtr());
SaveFocus();
if (!ref)
return;
}
current_state_ = DragState::kDraggingTabs;
Attach(source_context_, gfx::Point());
if (int{drag_data_.size()} ==
source_context_->GetTabStripModel()->count()) {
views::Widget* widget = GetAttachedBrowserWidget();
gfx::Rect new_bounds;
gfx::Vector2d drag_offset;
if (was_source_maximized_ || was_source_fullscreen_) {
did_restore_window_ = true;
// When all tabs in a maximized browser are dragged the browser gets
// restored during the drag and maximized back when the drag ends.
const int tab_area_width = attached_context_->GetTabAreaWidth();
std::vector<gfx::Rect> drag_bounds = CalculateBoundsForDraggedTabs();
OffsetX(GetAttachedDragPoint(point_in_screen).x(), &drag_bounds);
new_bounds = CalculateDraggedBrowserBounds(
source_context_, point_in_screen, &drag_bounds);
new_bounds.Offset(-widget->GetRestoredBounds().x() +
point_in_screen.x() -
mouse_offset_.x(), 0);
widget->SetVisibilityChangedAnimationsEnabled(false);
widget->Restore();
widget->SetBounds(new_bounds);
drag_offset = GetWindowOffset(point_in_screen);
AdjustBrowserAndTabBoundsForDrag(tab_area_width, point_in_screen,
&drag_offset, &drag_bounds);
widget->SetVisibilityChangedAnimationsEnabled(true);
} else {
new_bounds =
CalculateNonMaximizedDraggedBrowserBounds(widget, point_in_screen);
widget->SetBounds(new_bounds);
drag_offset = GetWindowOffset(point_in_screen);
}
#if defined(OS_CHROMEOS)
StoreCurrentDraggedBrowserBoundsInTabletMode(widget->GetNativeWindow(),
new_bounds);
#endif
RunMoveLoop(drag_offset);
return;
}
}
if (ContinueDragging(point_in_screen) == Liveness::DELETED)
return;
}
void TabDragController::EndDrag(EndDragReason reason) {
TRACE_EVENT0("views", "TabDragController::EndDrag");
// If we're dragging a window ignore capture lost since it'll ultimately
// trigger the move loop to end and we'll revert the drag when RunMoveLoop()
// finishes.
if (reason == END_DRAG_CAPTURE_LOST &&
current_state_ == DragState::kDraggingWindow) {
return;
}
// If we're dragging a window, end the move loop, returning control to
// RunMoveLoop() which will end the drag.
if (current_state_ == DragState::kDraggingWindow) {
current_state_ = DragState::kWaitingToStop;
GetAttachedBrowserWidget()->EndMoveLoop();
return;
}
#if defined(OS_CHROMEOS)
// It's possible that in Chrome OS we defer the windows that are showing in
// overview to attach into during dragging. If so we need to attach the
// dragged tabs to it first.
if (reason == END_DRAG_COMPLETE && deferred_target_context_observer_)
PerformDeferredAttach();
// It's also possible that we need to merge the dragged tabs back into the
// source window even if the dragged tabs is dragged away from the source
// window.
if (source_context_ &&
GetWindowForTabDraggingProperties(source_context_)
->GetProperty(ash::kIsDeferredTabDraggingTargetWindowKey)) {
GetWindowForTabDraggingProperties(source_context_)
->ClearProperty(ash::kIsDeferredTabDraggingTargetWindowKey);
reason = END_DRAG_CANCEL;
}
#endif
EndDragImpl(reason != END_DRAG_COMPLETE && source_context_ ? CANCELED
: NORMAL);
}
void TabDragController::InitTabDragData(Tab* tab,
TabDragData* drag_data) {
TRACE_EVENT0("views", "TabDragController::InitTabDragData");
drag_data->source_model_index = source_context_->GetIndexOf(tab);
drag_data->contents = source_context_->GetTabStripModel()->GetWebContentsAt(
drag_data->source_model_index);
drag_data->pinned = source_context_->IsTabPinned(tab);
}
void TabDragController::OnWidgetBoundsChanged(views::Widget* widget,
const gfx::Rect& new_bounds) {
TRACE_EVENT1("views", "TabDragController::OnWidgetBoundsChanged",
"new_bounds", new_bounds.ToString());
// Detaching and attaching can be suppresed temporarily to suppress attaching
// to incorrect window on changing bounds. We should prevent Drag() itself,
// otherwise it can clear deferred attaching tab.
if (!CanDetachFromTabStrip(GetContextForWindow(widget->GetNativeWindow())))
return;
#if defined(USE_AURA)
aura::Env* env = aura::Env::GetInstance();
// WidgetBoundsChanged happens as a step of ending a drag, but Drag() doesn't
// have to be called -- GetCursorScreenPoint() may return an incorrect
// location in such case and causes a weird effect. See
// https://crbug.com/914527 for the details.
if (!env->IsMouseButtonDown() && !env->is_touch_down())
return;
#endif
Drag(GetCursorScreenPoint());
}
void TabDragController::OnSourceTabStripEmpty() {
// NULL out source_context_ so that we don't attempt to add back to it (in
// the case of a revert).
source_context_ = nullptr;
#if defined(OS_CHROMEOS)
// Also update the source window info for the current dragged window.
if (attached_context_) {
GetWindowForTabDraggingProperties(attached_context_)
->ClearProperty(ash::kTabDraggingSourceWindowKey);
}
#endif
}
void TabDragController::OnActiveStripWebContentsRemoved(
content::WebContents* contents) {
// Mark closed tabs as destroyed so we don't try to manipulate them later.
for (auto it = drag_data_.begin(); it != drag_data_.end(); it++) {
if (it->contents == contents) {
it->contents = nullptr;
break;
}
}
}
///////////////////////////////////////////////////////////////////////////////
// TabDragController, private:
void TabDragController::InitWindowCreatePoint() {
// window_create_point_ is only used in CompleteDrag() (through
// GetWindowCreatePoint() to get the start point of the docked window) when
// the attached_context_ is NULL and all the window's related bound
// information are obtained from source_context_. So, we need to get the
// first_tab based on source_context_, not attached_context_. 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_context_->GetTabAt(0);
views::View::ConvertPointToWidget(first_tab, &first_source_tab_point_);
window_create_point_ = first_source_tab_point_;
window_create_point_.Offset(mouse_offset_.x(), mouse_offset_.y());
}
gfx::Point TabDragController::GetWindowCreatePoint(
const gfx::Point& origin) const {
// If the cursor is outside the monitor area, move it inside. For example,
// dropping a tab onto the task bar on Windows produces this situation.
gfx::Rect work_area =
display::Screen::GetScreen()->GetDisplayNearestPoint(origin).work_area();
gfx::Point create_point(origin);
if (!work_area.IsEmpty()) {
if (create_point.x() < work_area.x())
create_point.set_x(work_area.x());
else if (create_point.x() > work_area.right())
create_point.set_x(work_area.right());
if (create_point.y() < work_area.y())
create_point.set_y(work_area.y());
else if (create_point.y() > work_area.bottom())
create_point.set_y(work_area.bottom());
}
return gfx::Point(create_point.x() - window_create_point_.x(),
create_point.y() - window_create_point_.y());
}
void TabDragController::SaveFocus() {
DCHECK(source_context_);
old_focused_view_tracker_->SetView(
source_context_->AsView()->GetFocusManager()->GetFocusedView());
source_context_->AsView()->GetFocusManager()->ClearFocus();
// WARNING: we may have been deleted.
}
void TabDragController::RestoreFocus() {
if (attached_context_ != source_context_) {
if (is_dragging_new_browser_) {
content::WebContents* active_contents = source_dragged_contents();
if (active_contents && !active_contents->FocusLocationBarByDefault())
active_contents->Focus();
}
return;
}
views::View* old_focused_view = old_focused_view_tracker_->view();
if (!old_focused_view)
return;
old_focused_view->GetFocusManager()->SetFocusedView(old_focused_view);
}
bool TabDragController::CanStartDrag(const gfx::Point& point_in_screen) const {
// Determine if the mouse has moved beyond a minimum elasticity distance in
// any direction from the starting point.
static const int kMinimumDragDistance = 10;
int x_offset = abs(point_in_screen.x() - start_point_in_screen_.x());
int y_offset = abs(point_in_screen.y() - start_point_in_screen_.y());
return sqrt(pow(float{x_offset}, 2) + pow(float{y_offset}, 2)) >
kMinimumDragDistance;
}
TabDragController::Liveness TabDragController::ContinueDragging(
const gfx::Point& point_in_screen) {
TRACE_EVENT1("views", "TabDragController::ContinueDragging",
"point_in_screen", point_in_screen.ToString());
DCHECK(attached_context_);
TabDragContext* target_context = source_context_;
if (detach_behavior_ == DETACHABLE &&
GetTargetTabStripForPoint(point_in_screen, &target_context) ==
Liveness::DELETED) {
return Liveness::DELETED;
}
// The dragged tabs may not be able to attach into |target_context| during
// dragging if the window accociated with |target_context| is currently
// showing in overview mode in Chrome OS, in this case we defer attaching into
// it till the drag ends and reset |target_context| here.
if (ShouldAttachOnEnd(target_context)) {
SetDeferredTargetTabstrip(target_context);
target_context = current_state_ == DragState::kDraggingWindow
? attached_context_
: nullptr;
} else {
SetDeferredTargetTabstrip(nullptr);
}
bool tab_strip_changed = (target_context != attached_context_);
if (attached_context_) {
int move_delta = point_in_screen.x() - last_point_in_screen_.x();
if (move_delta > 0)
mouse_has_ever_moved_right_ = true;
else if (move_delta < 0)
mouse_has_ever_moved_left_ = true;
}
last_point_in_screen_ = point_in_screen;
if (tab_strip_changed) {
is_dragging_new_browser_ = false;
did_restore_window_ = false;
if (DragBrowserToNewTabStrip(target_context, point_in_screen) ==
DRAG_BROWSER_RESULT_STOP) {
return Liveness::ALIVE;
}
}
if (current_state_ == DragState::kDraggingWindow) {
bring_to_front_timer_.Start(
FROM_HERE, base::TimeDelta::FromMilliseconds(kBringToFrontDelay),
base::Bind(&TabDragController::BringWindowUnderPointToFront,
base::Unretained(this), point_in_screen));
}
if (current_state_ == DragState::kDraggingTabs) {
if (move_only()) {
DragActiveTabStacked(point_in_screen);
} else {
MoveAttached(point_in_screen);
if (tab_strip_changed) {
// Move the corresponding window to the front. We do this after the
// move as on windows activate triggers a synchronous paint.
attached_context_->AsView()->GetWidget()->Activate();
}
}
}
return Liveness::ALIVE;
}
TabDragController::DragBrowserResultType
TabDragController::DragBrowserToNewTabStrip(TabDragContext* target_context,
const gfx::Point& point_in_screen) {
TRACE_EVENT1("views", "TabDragController::DragBrowserToNewTabStrip",
"point_in_screen", point_in_screen.ToString());
if (!target_context) {
DetachIntoNewBrowserAndRunMoveLoop(point_in_screen);
return DRAG_BROWSER_RESULT_STOP;
}
#if defined(USE_AURA)
// Only Aura windows are gesture consumers.
gfx::NativeView attached_native_view =
GetAttachedBrowserWidget()->GetNativeView();
GetAttachedBrowserWidget()->GetGestureRecognizer()->TransferEventsTo(
attached_native_view,
target_context->AsView()->GetWidget()->GetNativeView(),
ui::TransferTouchesBehavior::kDontCancel);
#endif
if (current_state_ == DragState::kDraggingWindow) {
// ReleaseCapture() is going to result in calling back to us (because it
// results in a move). That'll cause all sorts of problems. Reset the
// observer so we don't get notified and process the event.
#if defined(OS_CHROMEOS)
move_loop_widget_->RemoveObserver(this);
move_loop_widget_ = nullptr;
#endif // OS_CHROMEOS
views::Widget* browser_widget = GetAttachedBrowserWidget();
// Need to release the drag controller before starting the move loop as it's
// going to trigger capture lost, which cancels drag.
attached_context_->ReleaseDragController();
target_context->OwnDragController(this);
// Disable animations so that we don't see a close animation on aero.
browser_widget->SetVisibilityChangedAnimationsEnabled(false);
if (can_release_capture_)
browser_widget->ReleaseCapture();
else
SetCapture(target_context);
#if !defined(OS_LINUX) || defined(OS_CHROMEOS)
// EndMoveLoop is going to snap the window back to its original location.
// Hide it so users don't see this. Hiding a window in Linux aura causes
// it to lose capture so skip it.
browser_widget->Hide();
#endif
browser_widget->EndMoveLoop();
// Ideally we would always swap the tabs now, but on non-ash Windows, it
// seems that running the move loop implicitly activates the window when
// done, leading to all sorts of flicker. So, on non-ash Windows, instead
// we process the move after the loop completes. But on chromeos, we can
// do tab swapping now to avoid the tab flashing issue
// (crbug.com/116329).
if (can_release_capture_) {
tab_strip_to_attach_to_after_exit_ = target_context;
current_state_ = DragState::kWaitingToDragTabs;
} else {
Detach(DONT_RELEASE_CAPTURE);
Attach(target_context, point_in_screen);
current_state_ = DragState::kDraggingTabs;
// Move the tabs into position.
MoveAttached(point_in_screen);
attached_context_->AsView()->GetWidget()->Activate();
}
return DRAG_BROWSER_RESULT_STOP;
}
Detach(DONT_RELEASE_CAPTURE);
Attach(target_context, point_in_screen);
return DRAG_BROWSER_RESULT_CONTINUE;
}
void TabDragController::DragActiveTabStacked(
const gfx::Point& point_in_screen) {
if (attached_context_->GetTabCount() != int{initial_tab_positions_.size()})
return; // TODO: should cancel drag if this happens.
int delta = point_in_screen.x() - start_point_in_screen_.x();
attached_context_->DragActiveTabStacked(initial_tab_positions_, delta);
}
void TabDragController::MoveAttachedToNextStackedIndex(
const gfx::Point& point_in_screen) {
int index = *attached_context_->GetActiveTouchIndex();
if (index + 1 >= attached_context_->GetTabCount())
return;
attached_context_->GetTabStripModel()->MoveSelectedTabsTo(index + 1);
StartMoveStackedTimerIfNecessary(point_in_screen,
kMoveAttachedSubsequentDelay);
}
void TabDragController::MoveAttachedToPreviousStackedIndex(
const gfx::Point& point_in_screen) {
int index = *attached_context_->GetActiveTouchIndex();
if (index <= attached_context_->GetPinnedTabCount())
return;
attached_context_->GetTabStripModel()->MoveSelectedTabsTo(index - 1);
StartMoveStackedTimerIfNecessary(point_in_screen,
kMoveAttachedSubsequentDelay);
}
void TabDragController::MoveAttached(const gfx::Point& point_in_screen) {
DCHECK(attached_context_);
DCHECK_EQ(current_state_, DragState::kDraggingTabs);
gfx::Point dragged_view_point = GetAttachedDragPoint(point_in_screen);
const int threshold = attached_context_->GetHorizontalDragThreshold();
std::vector<Tab*> tabs(drag_data_.size());
for (size_t i = 0; i < drag_data_.size(); ++i)
tabs[i] = drag_data_[i].attached_tab;
bool did_layout = false;
// Update the model, moving the WebContents from one index to another. Do this
// only if we have moved a minimum distance since the last reorder (to prevent
// jitter) or if this the first move and the tabs are not consecutive.
if ((abs(point_in_screen.x() - last_move_screen_loc_) > threshold ||
(initial_move_ && !AreTabsConsecutive()))) {
TabStripModel* attached_model = attached_context_->GetTabStripModel();
int to_index = attached_context_->GetInsertionIndexForDraggedBounds(
GetDraggedViewTabStripBounds(dragged_view_point), false,
int{drag_data_.size()}, mouse_has_ever_moved_left_,
mouse_has_ever_moved_right_);
bool do_move = true;
// While dragging within a tabstrip the expectation is the insertion index
// is based on the left edge of the tabs being dragged. OTOH when dragging
// into a new tabstrip (attaching) the expectation is the insertion index is
// based on the cursor. This proves problematic as insertion may change the
// size of the tabs, resulting in the index calculated before the insert
// differing from the index calculated after the insert. To alleviate this
// the index is chosen before insertion, and subsequently a new index is
// only used once the mouse moves enough such that the index changes based
// on the direction the mouse moved relative to |attach_x_| (smaller
// x-coordinate should yield a smaller index or larger x-coordinate yields a
// larger index).
if (attach_index_ != -1) {
gfx::Point tab_strip_point(point_in_screen);
views::View::ConvertPointFromScreen(attached_context_->AsView(),
&tab_strip_point);
const int new_x =
attached_context_->AsView()->GetMirroredXInView(tab_strip_point.x());
if (new_x < attach_x_)
to_index = std::min(to_index, attach_index_);
else
to_index = std::max(to_index, attach_index_);
if (to_index != attach_index_)
attach_index_ = -1; // Once a valid move is detected, don't constrain.
else
do_move = false;
}
if (do_move) {
WebContents* last_contents = drag_data_.back().contents;
int index_of_last_item =
attached_model->GetIndexOfWebContents(last_contents);
if (initial_move_) {
// TabDragContext determines if the tabs needs to be animated
// based on model position. This means we need to invoke
// LayoutDraggedTabsAt before changing the model.
attached_context_->LayoutDraggedTabsAt(
tabs, source_tab_drag_data()->attached_tab, dragged_view_point,
initial_move_);
did_layout = true;
}
attached_model->MoveSelectedTabsTo(to_index);
// Move may do nothing in certain situations (such as when dragging pinned
// tabs). Make sure the tabstrip actually changed before updating
// last_move_screen_loc_.
if (index_of_last_item !=
attached_model->GetIndexOfWebContents(last_contents)) {
last_move_screen_loc_ = point_in_screen.x();
}
}
}
if (!did_layout) {
attached_context_->LayoutDraggedTabsAt(tabs,
source_tab_drag_data()->attached_tab,
dragged_view_point, initial_move_);
}
StartMoveStackedTimerIfNecessary(point_in_screen, kMoveAttachedInitialDelay);
initial_move_ = false;
}
void TabDragController::StartMoveStackedTimerIfNecessary(
const gfx::Point& point_in_screen,
int delay_ms) {
DCHECK(attached_context_);
base::Optional<int> touch_index = attached_context_->GetActiveTouchIndex();
if (!touch_index)
return;
gfx::Point dragged_view_point = GetAttachedDragPoint(point_in_screen);
gfx::Rect bounds = GetDraggedViewTabStripBounds(dragged_view_point);
if (attached_context_->ShouldDragToNextStackedTab(
bounds, *touch_index, mouse_has_ever_moved_right_)) {
move_stacked_timer_.Start(
FROM_HERE, base::TimeDelta::FromMilliseconds(delay_ms),
base::Bind(&TabDragController::MoveAttachedToNextStackedIndex,
base::Unretained(this), point_in_screen));
} else if (attached_context_->ShouldDragToPreviousStackedTab(
bounds, *touch_index, mouse_has_ever_moved_left_)) {
move_stacked_timer_.Start(
FROM_HERE, base::TimeDelta::FromMilliseconds(delay_ms),
base::Bind(&TabDragController::MoveAttachedToPreviousStackedIndex,
base::Unretained(this), point_in_screen));
}
}
TabDragController::DetachPosition TabDragController::GetDetachPosition(
const gfx::Point& point_in_screen) {
DCHECK(attached_context_);
gfx::Point attached_point(point_in_screen);
views::View::ConvertPointFromScreen(attached_context_->AsView(),
&attached_point);
if (attached_point.x() < 0)
return DETACH_BEFORE;
if (attached_point.x() >= attached_context_->TabDragAreaEndX())
return DETACH_AFTER;
return DETACH_ABOVE_OR_BELOW;
}
TabDragController::Liveness TabDragController::GetTargetTabStripForPoint(
const gfx::Point& point_in_screen,
TabDragContext** context) {
*context = nullptr;
TRACE_EVENT1("views", "TabDragController::GetTargetTabStripForPoint",
"point_in_screen", point_in_screen.ToString());
if (move_only() && attached_context_) {
// move_only() is intended for touch, in which case we only want to detach
// if the touch point moves significantly in the vertical distance.
gfx::Rect tabstrip_bounds = GetTabstripScreenBounds(attached_context_);
if (DoesRectContainVerticalPointExpanded(tabstrip_bounds,
kTouchVerticalDetachMagnetism,
point_in_screen.y())) {
*context = attached_context_;
return Liveness::ALIVE;
}
}
gfx::NativeWindow local_window;
const Liveness state = GetLocalProcessWindow(
point_in_screen, current_state_ == DragState::kDraggingWindow,
&local_window);
if (state == Liveness::DELETED)
return Liveness::DELETED;
// Do not allow dragging into a window with a modal dialog, it causes a weird
// behavior. See crbug.com/336691
if (local_window && !ShouldDisallowDrag(local_window)) {
TabDragContext* destination_tab_strip = GetContextForWindow(local_window);
if (ShouldAttachOnEnd(destination_tab_strip)) {
// No need to check if the specified screen point is within the bounds of
// the tabstrip as arriving here we know that the window is currently
// showing in overview mode in Chrome OS and its bounds contain the
// specified screen point, and these two conditions are enough for a
// window to be a valid target window to attach the dragged tabs.
*context = destination_tab_strip;
return Liveness::ALIVE;
} else if (destination_tab_strip &&
DoesTabStripContain(destination_tab_strip, point_in_screen)) {
*context = destination_tab_strip;
return Liveness::ALIVE;
}
}
*context = current_state_ == DragState::kDraggingWindow ? attached_context_
: nullptr;
return Liveness::ALIVE;
}
TabDragContext* TabDragController::GetContextForWindow(
gfx::NativeWindow window) {
if (!window)
return NULL;
BrowserView* browser_view =
BrowserView::GetBrowserViewForNativeWindow(window);
// We don't allow drops on windows that don't have tabstrips.
if (!browser_view ||
!browser_view->browser()->SupportsWindowFeature(
Browser::FEATURE_TABSTRIP))
return NULL;
TabDragContext* other_context = browser_view->tabstrip()->GetDragContext();
TabDragContext* context =
attached_context_ ? attached_context_ : source_context_;
DCHECK(context);
return other_context->IsCompatibleWith(context) ? other_context : nullptr;
}
bool TabDragController::DoesTabStripContain(
TabDragContext* context,
const gfx::Point& point_in_screen) const {
// Make sure the specified screen point is actually within the bounds of the
// specified context...
gfx::Rect tabstrip_bounds = GetTabstripScreenBounds(context);
const int x_in_strip = point_in_screen.x() - tabstrip_bounds.x();
return (x_in_strip >= 0) && (x_in_strip < context->TabDragAreaEndX()) &&
DoesRectContainVerticalPointExpanded(
tabstrip_bounds, kVerticalDetachMagnetism, point_in_screen.y());
}
void TabDragController::Attach(TabDragContext* attached_context,
const gfx::Point& point_in_screen,
bool set_capture) {
TRACE_EVENT1("views", "TabDragController::Attach",
"point_in_screen", point_in_screen.ToString());
DCHECK(!attached_context_); // We should already have detached by the time
// we get here.
attached_context_ = attached_context;
std::vector<Tab*> tabs = GetTabsMatchingDraggedContents(attached_context_);
if (tabs.empty()) {
// Transitioning from detached to attached to a new context. Add tabs to
// the new model.
selection_model_before_attach_ =
attached_context->GetTabStripModel()->selection_model();
// 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_ = point_in_screen.x();
// 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::Point tab_strip_point(point_in_screen);
views::View::ConvertPointFromScreen(attached_context_->AsView(),
&tab_strip_point);
tab_strip_point.set_x(
attached_context_->AsView()->GetMirroredXInView(tab_strip_point.x()));
tab_strip_point.Offset(0, -mouse_offset_.y());
int index = attached_context_->GetInsertionIndexForDraggedBounds(
GetDraggedViewTabStripBounds(tab_strip_point), true,
int{drag_data_.size()}, mouse_has_ever_moved_left_,
mouse_has_ever_moved_right_);
attach_index_ = index;
attach_x_ = tab_strip_point.x();
base::AutoReset<bool> setter(&is_mutating_, true);
for (size_t i = 0; i < drag_data_.size(); ++i) {
int add_types = TabStripModel::ADD_NONE;
if (attached_context_->GetActiveTouchIndex()) {
// StackedTabStripLayout positions relative to the active tab, if we
// don't add the tab as active things bounce around.
DCHECK_EQ(1u, drag_data_.size());
add_types |= TabStripModel::ADD_ACTIVE;
}
if (drag_data_[i].pinned)
add_types |= TabStripModel::ADD_PINNED;
attached_context_->GetTabStripModel()->InsertWebContentsAt(
index + i, std::move(drag_data_[i].owned_contents), add_types);
// If a sad tab is showing, the SadTabView needs to be updated.
SadTabHelper* sad_tab_helper =
SadTabHelper::FromWebContents(drag_data_[i].contents);
if (sad_tab_helper)
sad_tab_helper->ReinstallInWebView();
}
tabs = GetTabsMatchingDraggedContents(attached_context_);
}
DCHECK_EQ(tabs.size(), drag_data_.size());
for (size_t i = 0; i < drag_data_.size(); ++i)
drag_data_[i].attached_tab = tabs[i];
ResetSelection(attached_context_->GetTabStripModel());
// This should be called after ResetSelection() in order to generate
// bounds correctly. http://crbug.com/836004
attached_context_->StartedDraggingTabs(tabs);
// The size of the dragged tab may have changed. Adjust the x offset so that
// ratio of mouse_offset_ to original width is maintained.
std::vector<Tab*> tabs_to_source(tabs);
tabs_to_source.erase(tabs_to_source.begin() + source_tab_index_ + 1,
tabs_to_source.end());
int new_x = TabStrip::GetSizeNeededForTabs(tabs_to_source) -
tabs[source_tab_index_]->width() +
gfx::ToRoundedInt(offset_to_width_ratio_ *
tabs[source_tab_index_]->width());
mouse_offset_.set_x(new_x);
// Transfer ownership of us to the new tabstrip as well as making sure the
// window has capture. This is important so that if activation changes the
// drag isn't prematurely canceled.
if (set_capture)
SetCapture(attached_context_);
attached_context_->OwnDragController(this);
SetTabDraggingInfo();
attached_context_tabs_closed_tracker_ =
std::make_unique<DraggedTabsClosedTracker>(
attached_context_->GetTabStripModel(), this);
}
void TabDragController::Detach(ReleaseCapture release_capture) {
TRACE_EVENT1("views", "TabDragController::Detach",
"release_capture", release_capture);
attached_context_tabs_closed_tracker_.reset();
attach_index_ = -1;
// When the user detaches we assume they want to reorder.
move_behavior_ = REORDER;
// Release ownership of the drag controller and mouse capture. When we
// reattach ownership is transfered.
attached_context_->ReleaseDragController();
if (release_capture == RELEASE_CAPTURE)
attached_context_->AsView()->GetWidget()->ReleaseCapture();
mouse_has_ever_moved_left_ = true;
mouse_has_ever_moved_right_ = true;
std::vector<gfx::Rect> drag_bounds = CalculateBoundsForDraggedTabs();
TabStripModel* attached_model = attached_context_->GetTabStripModel();
std::vector<TabRendererData> tab_data;
for (size_t i = 0; i < drag_data_.size(); ++i) {
tab_data.push_back(drag_data_[i].attached_tab->data());
int index = attached_model->GetIndexOfWebContents(drag_data_[i].contents);
DCHECK_NE(-1, index);
// Hide the tab so that the user doesn't see it animate closed.
drag_data_[i].attached_tab->SetVisible(false);
drag_data_[i].attached_tab->set_detached();
drag_data_[i].owned_contents = attached_model->DetachWebContentsAt(index);
// Detaching may end up deleting the tab, drop references to it.
drag_data_[i].attached_tab = NULL;
}
// If we've removed the last Tab from the TabDragContext, hide the
// frame now.
if (!attached_model->empty()) {
if (!selection_model_before_attach_.empty() &&
selection_model_before_attach_.active() >= 0 &&
selection_model_before_attach_.active() < attached_model->count()) {
// Restore the selection.
attached_model->SetSelectionFromModel(selection_model_before_attach_);
} else if (attached_context_ == source_context_ &&
!initial_selection_model_.empty()) {
RestoreInitialSelection();
}
}
ClearTabDraggingInfo();
attached_context_->DraggedTabsDetached();
attached_context_ = NULL;
}
void TabDragController::DetachIntoNewBrowserAndRunMoveLoop(
const gfx::Point& point_in_screen) {
if (attached_context_->GetTabStripModel()->count() ==
int{drag_data_.size()}) {
// All the tabs in a browser are being dragged but all the tabs weren't
// initially being dragged. For this to happen the user would have to
// start dragging a set of tabs, the other tabs close, then detach.
RunMoveLoop(GetWindowOffset(point_in_screen));
return;
}
const int tab_area_width = attached_context_->GetTabAreaWidth();
std::vector<gfx::Rect> drag_bounds = CalculateBoundsForDraggedTabs();
OffsetX(GetAttachedDragPoint(point_in_screen).x(), &drag_bounds);
gfx::Vector2d drag_offset;
Browser* browser = CreateBrowserForDrag(attached_context_, point_in_screen,
&drag_offset, &drag_bounds);
BrowserView* dragged_browser_view =
BrowserView::GetBrowserViewForBrowser(browser);
views::Widget* dragged_widget = dragged_browser_view->GetWidget();
#if defined(USE_AURA)
// Only Aura windows are gesture consumers.
views::Widget* attached_widget = attached_context_->AsView()->GetWidget();
// Unlike DragBrowserToNewTabStrip, this does not have to special-handle
// IsUsingWindowServices(), since DesktopWIndowTreeHostMus takes care of it.
attached_widget->GetGestureRecognizer()->TransferEventsTo(
attached_widget->GetNativeView(), dragged_widget->GetNativeView(),
ui::TransferTouchesBehavior::kDontCancel);
#endif
#if defined(OS_CHROMEOS)
// On ChromeOS, Detach should release capture; |can_release_capture_| is
// false on ChromeOS because it can cancel touches, but for this cases
// the touches are already transferred, so releasing is fine. Without
// releasing, the capture remains and further touch events can be sent to a
// wrong target.
Detach(RELEASE_CAPTURE);
#else
Detach(can_release_capture_ ? RELEASE_CAPTURE : DONT_RELEASE_CAPTURE);
#endif
dragged_widget->SetCanAppearInExistingFullscreenSpaces(true);
dragged_widget->SetVisibilityChangedAnimationsEnabled(false);
Attach(dragged_browser_view->tabstrip()->GetDragContext(), gfx::Point());
AdjustBrowserAndTabBoundsForDrag(tab_area_width, point_in_screen,
&drag_offset, &drag_bounds);
browser->window()->Show();
dragged_widget->SetVisibilityChangedAnimationsEnabled(true);
// Activate may trigger a focus loss, destroying us.
{
base::WeakPtr<TabDragController> ref(weak_factory_.GetWeakPtr());
browser->window()->Activate();
if (!ref)
return;
}
RunMoveLoop(drag_offset);
}
void TabDragController::RunMoveLoop(const gfx::Vector2d& drag_offset) {
// If the user drags the whole window we'll assume they are going to attach to
// another window and therefore want to reorder.
move_behavior_ = REORDER;
move_loop_widget_ = GetAttachedBrowserWidget();
DCHECK(move_loop_widget_);
move_loop_widget_->AddObserver(this);
current_state_ = DragState::kDraggingWindow;
base::WeakPtr<TabDragController> ref(weak_factory_.GetWeakPtr());
if (can_release_capture_) {
// Running the move loop releases mouse capture, which triggers destroying
// the drag loop. Release mouse capture now while the DragController is not
// owned by the TabDragContext.
attached_context_->ReleaseDragController();
attached_context_->AsView()->GetWidget()->ReleaseCapture();
attached_context_->OwnDragController(this);
}
const views::Widget::MoveLoopSource move_loop_source =
event_source_ == EVENT_SOURCE_MOUSE ?
views::Widget::MOVE_LOOP_SOURCE_MOUSE :
views::Widget::MOVE_LOOP_SOURCE_TOUCH;
const views::Widget::MoveLoopEscapeBehavior escape_behavior =
is_dragging_new_browser_ ?
views::Widget::MOVE_LOOP_ESCAPE_BEHAVIOR_HIDE :
views::Widget::MOVE_LOOP_ESCAPE_BEHAVIOR_DONT_HIDE;
views::Widget::MoveLoopResult result =
move_loop_widget_->RunMoveLoop(
drag_offset, move_loop_source, escape_behavior);
content::NotificationService::current()->Notify(
chrome::NOTIFICATION_TAB_DRAG_LOOP_DONE,
content::NotificationService::AllBrowserContextsAndSources(),
content::NotificationService::NoDetails());
if (!ref)
return;
if (move_loop_widget_) {
move_loop_widget_->RemoveObserver(this);
move_loop_widget_ = nullptr;
}
if (current_state_ == DragState::kDraggingWindow) {
current_state_ = DragState::kWaitingToStop;
}
if (current_state_ == DragState::kWaitingToDragTabs) {
DCHECK(tab_strip_to_attach_to_after_exit_);
gfx::Point point_in_screen(GetCursorScreenPoint());
Detach(DONT_RELEASE_CAPTURE);
Attach(tab_strip_to_attach_to_after_exit_, point_in_screen);
current_state_ = DragState::kDraggingTabs;
// Move the tabs into position.
MoveAttached(point_in_screen);
attached_context_->AsView()->GetWidget()->Activate();
// Activate may trigger a focus loss, destroying us.
if (!ref)
return;
tab_strip_to_attach_to_after_exit_ = NULL;
} else if (current_state_ == DragState::kWaitingToStop) {
EndDrag(result == views::Widget::MOVE_LOOP_CANCELED ?
END_DRAG_CANCEL : END_DRAG_COMPLETE);
}
}
gfx::Rect TabDragController::GetDraggedViewTabStripBounds(
const gfx::Point& tab_strip_point) {
// attached_tab is NULL when inserting into a new context.
// TODO(pkasting): This assumes there is just one tab being dragged, which is
// wrong when dragging multiple tabs; need to check all of |drag_data_|.
if (source_tab_drag_data()->attached_tab) {
return gfx::Rect(tab_strip_point.x(), tab_strip_point.y(),
source_tab_drag_data()->attached_tab->width(),
source_tab_drag_data()->attached_tab->height());
}
return gfx::Rect(tab_strip_point.x(), tab_strip_point.y(),
attached_context_->GetActiveTabWidth(),
GetLayoutConstant(TAB_HEIGHT));
}
gfx::Point TabDragController::GetAttachedDragPoint(
const gfx::Point& point_in_screen) {
DCHECK(attached_context_); // The tab must be attached.
gfx::Point tab_loc(point_in_screen);
views::View::ConvertPointFromScreen(attached_context_->AsView(), &tab_loc);
const int x = attached_context_->AsView()->GetMirroredXInView(tab_loc.x()) -
mouse_offset_.x();
// TODO: consider caching this.
std::vector<Tab*> attached_tabs;
for (size_t i = 0; i < drag_data_.size(); ++i)
attached_tabs.push_back(drag_data_[i].attached_tab);
const int max_x = attached_context_->TabDragAreaEndX() -
TabStrip::GetSizeNeededForTabs(attached_tabs);
return gfx::Point(base::ClampToRange(x, 0, max_x), 0);
}
std::vector<Tab*> TabDragController::GetTabsMatchingDraggedContents(
TabDragContext* context) {
TabStripModel* model = attached_context_->GetTabStripModel();
std::vector<Tab*> tabs;
for (size_t i = 0; i < drag_data_.size(); ++i) {
int model_index = model->GetIndexOfWebContents(drag_data_[i].contents);
if (model_index == TabStripModel::kNoTab)
return std::vector<Tab*>();
tabs.push_back(context->GetTabAt(model_index));
}
return tabs;
}
std::vector<gfx::Rect> TabDragController::CalculateBoundsForDraggedTabs() {
std::vector<Tab*> attached_tabs;
for (size_t i = 0; i < drag_data_.size(); ++i)
attached_tabs.push_back(drag_data_[i].attached_tab);
return attached_context_->CalculateBoundsForDraggedTabs(attached_tabs);
}
void TabDragController::EndDragImpl(EndDragType type) {
DragState previous_state = current_state_;
current_state_ = DragState::kStopped;
attached_context_tabs_closed_tracker_.reset();
bring_to_front_timer_.Stop();
move_stacked_timer_.Stop();
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 (previous_state != DragState::kNotStarted) {
// After the drag ends, sometimes it shouldn't restore the focus, because
// - if |attached_context_| is showing in overview mode, overview mode
// may be ended unexpectly because of the window activation.
// - Some dragging gesture (like fling down) minimizes the window, but the
// window activation cancels minimized status. See
// https://crbug.com/902897
if (!IsShowingInOverview(attached_context_) &&
!attached_context_->AsView()->GetWidget()->IsMinimized()) {
RestoreFocus();
}
GetAttachedBrowserWidget()->SetCanAppearInExistingFullscreenSpaces(false);
if (type == CANCELED)
RevertDrag();
else
CompleteDrag();
}
} else if (drag_data_.size() > 1) {
initial_selection_model_.Clear();
if (previous_state != DragState::kNotStarted)
RevertDrag();
} // else case the only tab we were dragging was deleted. Nothing to do.
// Clear tab dragging info after the complete/revert as CompleteDrag() may
// need to use some of the properties.
ClearTabDraggingInfo();
// Clear out drag data so we don't attempt to do anything with it.
drag_data_.clear();
TabDragContext* owning_context =
attached_context_ ? attached_context_ : source_context_;
owning_context->DestroyDragController();
}
void TabDragController::PerformDeferredAttach() {
#if defined(OS_CHROMEOS)
TabDragContext* deferred_target_context =
deferred_target_context_observer_->deferred_target_context();
if (!deferred_target_context)
return;
DCHECK_NE(deferred_target_context, attached_context_);
// |is_dragging_new_browser_| needs to be reset here since after this function
// is called, the browser window that was specially created for the dragged
// tab(s) will be destroyed.
is_dragging_new_browser_ = false;
// |did_restore_window_| is only set to be true if the dragged window is the
// source window and the source window was maximized or fullscreen before the
// drag starts. It also needs to be reset to false here otherwise after this
// function is called, the newly attached window may be maximized unexpectedly
// after the drag ends.
did_restore_window_ = false;
// GetCursorScreenPoint() needs to be called before Detach() is called as
// GetCursorScreenPoint() may use the current attached tabstrip to get the
// touch event position but Detach() sets attached tabstrip to nullptr.
// On ChromeOS, the gesture state is already cleared and so
// GetCursorScreenPoint() will fail to obtain the last touch location.
// Therefore it uses the last remembered location instead.
const gfx::Point current_screen_point = (event_source_ == EVENT_SOURCE_TOUCH)
? last_point_in_screen_
: GetCursorScreenPoint();
Detach(DONT_RELEASE_CAPTURE);
// If we're attaching the dragged tabs to an overview window's tabstrip, the
// tabstrip should not have focus.
Attach(deferred_target_context, current_screen_point, /*set_capture=*/false);
SetDeferredTargetTabstrip(nullptr);
deferred_target_context_observer_.reset();
#endif
}
void TabDragController::RevertDrag() {
std::vector<Tab*> tabs;
for (size_t i = 0; i < drag_data_.size(); ++i) {
if (drag_data_[i].contents) {
// Contents is NULL if a tab was destroyed while the drag was under way.
tabs.push_back(drag_data_[i].attached_tab);
RevertDragAt(i);
}
}
if (attached_context_) {
if (did_restore_window_)
MaximizeAttachedWindow();
if (attached_context_ == source_context_) {
source_context_->StoppedDraggingTabs(tabs, initial_tab_positions_,
move_behavior_ == MOVE_VISIBLE_TABS,
false);
} else {
attached_context_->DraggedTabsDetached();
}
}
if (initial_selection_model_.empty())
ResetSelection(source_context_->GetTabStripModel());
else
source_context_->GetTabStripModel()->SetSelectionFromModel(
initial_selection_model_);
if (source_context_)
source_context_->AsView()->GetWidget()->Activate();
}
void TabDragController::ResetSelection(TabStripModel* model) {
DCHECK(model);
ui::ListSelectionModel selection_model;
bool has_one_valid_tab = false;
for (size_t i = 0; i < drag_data_.size(); ++i) {
// |contents| is NULL if a tab was deleted out from under us.
if (drag_data_[i].contents) {
int index = model->GetIndexOfWebContents(drag_data_[i].contents);
DCHECK_NE(-1, index);
selection_model.AddIndexToSelection(index);
if (!has_one_valid_tab || i == source_tab_index_) {
// Reset the active/lead to the first tab. If the source tab is still
// valid we'll reset these again later on.
selection_model.set_active(index);
selection_model.set_anchor(index);
has_one_valid_tab = true;
}
}
}
if (!has_one_valid_tab)
return;
model->SetSelectionFromModel(selection_model);
}
void TabDragController::RestoreInitialSelection() {
// First time detaching from the source tabstrip. Reset selection model to
// initial_selection_model_. Before resetting though we have to remove all
// the tabs from initial_selection_model_ as it was created with the tabs
// still there.
ui::ListSelectionModel selection_model = initial_selection_model_;
for (DragData::const_reverse_iterator i(drag_data_.rbegin());
i != drag_data_.rend(); ++i) {
selection_model.DecrementFrom(i->source_model_index);
}
// We may have cleared out the selection model. Only reset it if it
// contains something.
if (selection_model.empty())
return;
// The anchor/active may have been among the tabs that were dragged out. Force
// the anchor/active to be valid.
if (selection_model.anchor() == ui::ListSelectionModel::kUnselectedIndex)
selection_model.set_anchor(selection_model.selected_indices()[0]);
if (selection_model.active() == ui::ListSelectionModel::kUnselectedIndex)
selection_model.set_active(selection_model.selected_indices()[0]);
source_context_->GetTabStripModel()->SetSelectionFromModel(selection_model);
}
void TabDragController::RevertDragAt(size_t drag_index) {
DCHECK_NE(current_state_, DragState::kNotStarted);
DCHECK(source_context_);
base::AutoReset<bool> setter(&is_mutating_, true);
TabDragData* data = &(drag_data_[drag_index]);
if (attached_context_) {
int index = attached_context_->GetTabStripModel()->GetIndexOfWebContents(
data->contents);
if (attached_context_ != source_context_) {
// The Tab was inserted into another TabDragContext. We need to
// put it back into the original one.
std::unique_ptr<content::WebContents> detached_web_contents =
attached_context_->GetTabStripModel()->DetachWebContentsAt(index);
// TODO(beng): (Cleanup) seems like we should use Attach() for this
// somehow.
source_context_->GetTabStripModel()->InsertWebContentsAt(
data->source_model_index, std::move(detached_web_contents),
(data->pinned ? TabStripModel::ADD_PINNED : 0));
} else {
// The Tab was moved within the TabDragContext where the drag
// was initiated. Move it back to the starting location.
source_context_->GetTabStripModel()->MoveWebContentsAt(
index, data->source_model_index, false);
}
} else {
// The Tab was detached from the TabDragContext where the drag
// began, and has not been attached to any other TabDragContext.
// We need to put it back into the source TabDragContext.
source_context_->GetTabStripModel()->InsertWebContentsAt(
data->source_model_index, std::move(data->owned_contents),
(data->pinned ? TabStripModel::ADD_PINNED : 0));
}
}
void TabDragController::CompleteDrag() {
DCHECK_NE(current_state_, DragState::kNotStarted);
if (attached_context_) {
if (is_dragging_new_browser_ || did_restore_window_) {
if (IsSnapped(attached_context_)) {
was_source_maximized_ = false;
was_source_fullscreen_ = false;
}
// If source window was maximized - maximize the new window as well.
if (was_source_maximized_ || was_source_fullscreen_)
MaximizeAttachedWindow();
}
attached_context_->StoppedDraggingTabs(
GetTabsMatchingDraggedContents(attached_context_),
initial_tab_positions_, move_behavior_ == MOVE_VISIBLE_TABS, true);
} else {
// Compel the model to construct a new window for the detached
// WebContentses.
views::Widget* widget = source_context_->AsView()->GetWidget();
gfx::Rect window_bounds(widget->GetRestoredBounds());
window_bounds.set_origin(GetWindowCreatePoint(last_point_in_screen_));
base::AutoReset<bool> setter(&is_mutating_, true);
std::vector<TabStripModelDelegate::NewStripContents> contentses;
for (size_t i = 0; i < drag_data_.size(); ++i) {
TabStripModelDelegate::NewStripContents item;
item.web_contents = std::move(drag_data_[i].owned_contents);
item.add_types = drag_data_[i].pinned ? TabStripModel::ADD_PINNED
: TabStripModel::ADD_NONE;
contentses.push_back(std::move(item));
}
Browser* new_browser =
source_context_->GetTabStripModel()
->delegate()
->CreateNewStripWithContents(std::move(contentses), window_bounds,
widget->IsMaximized());
ResetSelection(new_browser->tab_strip_model());
new_browser->window()->Show();
}
}
void TabDragController::MaximizeAttachedWindow() {
GetAttachedBrowserWidget()->Maximize();
#if defined(OS_MACOSX)
if (was_source_fullscreen_)
GetAttachedBrowserWidget()->SetFullscreen(true);
#endif
#if defined(OS_CHROMEOS)
if (was_source_fullscreen_) {
// In fullscreen mode it is only possible to get here if the source
// was in "immersive fullscreen" mode, so toggle it back on.
BrowserView* browser_view = BrowserView::GetBrowserViewForNativeWindow(
GetAttachedBrowserWidget()->GetNativeWindow());
DCHECK(browser_view);
if (!browser_view->IsFullscreen())
chrome::ToggleFullscreenMode(browser_view->browser());
}
#endif
}
void TabDragController::BringWindowUnderPointToFront(
const gfx::Point& point_in_screen) {
gfx::NativeWindow window;
if (GetLocalProcessWindow(point_in_screen, true, &window) ==
Liveness::DELETED) {
return;
}
// Only bring browser windows to front - only windows with a
// TabDragContext can be tab drag targets.
if (!GetContextForWindow(window))
return;
if (window) {
views::Widget* widget_window = views::Widget::GetWidgetForNativeWindow(
window);
if (!widget_window)
return;
#if defined(OS_CHROMEOS)
// TODO(varkha): The code below ensures that the phantom drag widget
// is shown on top of browser windows. The code should be moved to ash/
// and the phantom should be able to assert its top-most state on its own.
// One strategy would be for DragWindowController to
// be able to observe stacking changes to the phantom drag widget's
// siblings in order to keep it on top. One way is to implement a
// notification that is sent to a window parent's observers when a
// stacking order is changed among the children of that same parent.
// Note that OnWindowStackingChanged is sent only to the child that is the
// argument of one of the Window::StackChildX calls and not to all its
// siblings affected by the stacking change.
aura::Window* browser_window = widget_window->GetNativeView();
// Find a topmost non-popup window and stack the recipient browser above
// it in order to avoid stacking the browser window on top of the phantom
// drag widget created by DragWindowController in a second display.
for (aura::Window::Windows::const_reverse_iterator it =
browser_window->parent()->children().rbegin();
it != browser_window->parent()->children().rend(); ++it) {
// If the iteration reached the recipient browser window then it is
// already topmost and it is safe to return with no stacking change.
if (*it == browser_window)
return;
if ((*it)->type() != aura::client::WINDOW_TYPE_POPUP) {
widget_window->StackAbove(*it);
break;
}
}
#else
widget_window->StackAtTop();
#endif
// The previous call made the window appear on top of the dragged window,
// move the dragged window to the front.
if (current_state_ == DragState::kDraggingWindow)
attached_context_->AsView()->GetWidget()->StackAtTop();
}
}
views::Widget* TabDragController::GetAttachedBrowserWidget() {
return attached_context_->AsView()->GetWidget();
}
bool TabDragController::AreTabsConsecutive() {
for (size_t i = 1; i < drag_data_.size(); ++i) {
if (drag_data_[i - 1].source_model_index + 1 !=
drag_data_[i].source_model_index) {
return false;
}
}
return true;
}
gfx::Rect TabDragController::CalculateDraggedBrowserBounds(
TabDragContext* source,
const gfx::Point& point_in_screen,
std::vector<gfx::Rect>* drag_bounds) {
gfx::Point center(0, source->AsView()->height() / 2);
views::View::ConvertPointToWidget(source->AsView(), &center);
gfx::Rect new_bounds(source->AsView()->GetWidget()->GetRestoredBounds());
gfx::Rect work_area = display::Screen::GetScreen()
->GetDisplayNearestPoint(last_point_in_screen_)
.work_area();
if (new_bounds.size().width() >= work_area.size().width() &&
new_bounds.size().height() >= work_area.size().height()) {
new_bounds = work_area;
new_bounds.Inset(kMaximizedWindowInset, kMaximizedWindowInset,
kMaximizedWindowInset, kMaximizedWindowInset);
// Behave as if the |source| was maximized at the start of a drag since this
// is consistent with a browser window creation logic in case of windows
// that are as large as the |work_area|.
was_source_maximized_ = true;
}
if (source->AsView()->GetWidget()->IsMaximized()) {
// If the restore bounds is really small, we don't want to honor it
// (dragging a really small window looks wrong), instead make sure the new
// window is at least 50% the size of the old.
const gfx::Size max_size(
source->AsView()->GetWidget()->GetWindowBoundsInScreen().size());
new_bounds.set_width(
std::max(max_size.width() / 2, new_bounds.width()));
new_bounds.set_height(
std::max(max_size.height() / 2, new_bounds.height()));
}
#if defined(OS_CHROMEOS)
if (TabletModeClient::Get()->tablet_mode_enabled()) {
new_bounds = GetDraggedBrowserBoundsInTabletMode(
source->AsView()->GetWidget()->GetNativeWindow());
}
#endif
new_bounds.set_y(point_in_screen.y() - center.y());
switch (GetDetachPosition(point_in_screen)) {
case DETACH_BEFORE:
new_bounds.set_x(point_in_screen.x() - center.x());
new_bounds.Offset(-mouse_offset_.x(), 0);
break;
case DETACH_AFTER: {
gfx::Point right_edge(source->AsView()->width(), 0);
views::View::ConvertPointToWidget(source->AsView(), &right_edge);
new_bounds.set_x(point_in_screen.x() - right_edge.x());
new_bounds.Offset(drag_bounds->back().right() - mouse_offset_.x(), 0);
OffsetX(-drag_bounds->front().x(), drag_bounds);
break;
}
default:
break; // Nothing to do for DETACH_ABOVE_OR_BELOW.
}
// Account for the extra space above the tabstrip on restored windows versus
// maximized windows.
if (source->AsView()->GetWidget()->IsMaximized()) {
const auto* frame_view = static_cast<BrowserNonClientFrameView*>(
source->AsView()->GetWidget()->non_client_view()->frame_view());
new_bounds.Offset(
0, frame_view->GetTopInset(false) - frame_view->GetTopInset(true));
}
return new_bounds;
}
gfx::Rect TabDragController::CalculateNonMaximizedDraggedBrowserBounds(
views::Widget* widget,
const gfx::Point& point_in_screen) {
gfx::Rect bounds = widget->GetWindowBoundsInScreen();
#if defined(OS_CHROMEOS)
if (TabletModeClient::Get()->tablet_mode_enabled())
bounds = GetDraggedBrowserBoundsInTabletMode(widget->GetNativeWindow());
#endif
// The user has to move the mouse some amount of pixels before the drag
// starts. Offset the window by this amount so that the relative offset
// of the initial location is consistent. See https://crbug.com/518740
bounds.Offset(point_in_screen.x() - start_point_in_screen_.x(),
point_in_screen.y() - start_point_in_screen_.y());
return bounds;
}
void TabDragController::AdjustBrowserAndTabBoundsForDrag(
int tab_area_width,
const gfx::Point& point_in_screen,
gfx::Vector2d* drag_offset,
std::vector<gfx::Rect>* drag_bounds) {
attached_context_->ForceLayout();
const int dragged_context_width = attached_context_->GetTabAreaWidth();
// If the new tabstrip is smaller than the old resize the tabs.
if (dragged_context_width < tab_area_width) {
const float leading_ratio =
drag_bounds->front().x() / float{tab_area_width};
*drag_bounds = CalculateBoundsForDraggedTabs();
if (drag_bounds->back().right() < dragged_context_width) {
const int delta_x = std::min(
int{(leading_ratio * dragged_context_width)},
dragged_context_width -
(drag_bounds->back().right() - drag_bounds->front().x()));
OffsetX(delta_x, drag_bounds);
}
// Reposition the restored window such that the tab that was dragged remains
// under the mouse cursor.
gfx::Rect tab_bounds = (*drag_bounds)[source_tab_index_];
gfx::Point offset(
gfx::ToRoundedInt(tab_bounds.width() * offset_to_width_ratio_) +
tab_bounds.x(),
0);
views::View::ConvertPointToWidget(attached_context_->AsView(), &offset);
gfx::Rect bounds = GetAttachedBrowserWidget()->GetWindowBoundsInScreen();
bounds.set_x(point_in_screen.x() - offset.x());
GetAttachedBrowserWidget()->SetBounds(bounds);
*drag_offset = point_in_screen - bounds.origin();
}
attached_context_->SetTabBoundsForDrag(*drag_bounds);
}
Browser* TabDragController::CreateBrowserForDrag(
TabDragContext* source,
const gfx::Point& point_in_screen,
gfx::Vector2d* drag_offset,
std::vector<gfx::Rect>* drag_bounds) {
gfx::Rect new_bounds(CalculateDraggedBrowserBounds(source,
point_in_screen,
drag_bounds));
*drag_offset = point_in_screen - new_bounds.origin();
Profile* profile =
Profile::FromBrowserContext(drag_data_[0].contents->GetBrowserContext());
Browser::CreateParams create_params(Browser::TYPE_TABBED, profile,
/*user_gesture=*/true,
/*in_tab_dragging=*/true);
create_params.initial_bounds = new_bounds;
Browser* browser = new Browser(create_params);
is_dragging_new_browser_ = true;
// If the window is created maximized then the bounds we supplied are ignored.
// We need to reset them again so they are honored.
browser->window()->SetBounds(new_bounds);
return browser;
}
gfx::Point TabDragController::GetCursorScreenPoint() {
#if defined(OS_CHROMEOS)
if (event_source_ == EVENT_SOURCE_TOUCH &&
aura::Env::GetInstance()->is_touch_down()) {
views::Widget* widget = GetAttachedBrowserWidget();
DCHECK(widget);
aura::Window* widget_window = widget->GetNativeWindow();
DCHECK(widget_window->GetRootWindow());
gfx::PointF touch_point_f;
bool got_touch_point =
widget->GetGestureRecognizer()->GetLastTouchPointForTarget(
widget_window, &touch_point_f);
CHECK(got_touch_point);
gfx::Point touch_point = gfx::ToFlooredPoint(touch_point_f);
wm::ConvertPointToScreen(widget_window->GetRootWindow(), &touch_point);
return touch_point;
}
#endif
return display::Screen::GetScreen()->GetCursorScreenPoint();
}
gfx::Vector2d TabDragController::GetWindowOffset(
const gfx::Point& point_in_screen) {
TabDragContext* owning_context =
attached_context_ ? attached_context_ : source_context_;
views::View* toplevel_view =
owning_context->AsView()->GetWidget()->GetContentsView();
gfx::Point point = point_in_screen;
views::View::ConvertPointFromScreen(toplevel_view, &point);
return point.OffsetFromOrigin();
}
TabDragController::Liveness TabDragController::GetLocalProcessWindow(
const gfx::Point& screen_point,
bool exclude_dragged_view,
gfx::NativeWindow* window) {
std::set<gfx::NativeWindow> exclude;
if (exclude_dragged_view) {
gfx::NativeWindow dragged_window =
attached_context_->AsView()->GetWidget()->GetNativeWindow();
if (dragged_window)
exclude.insert(dragged_window);
}
#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
// Exclude windows which are pending deletion via Browser::TabStripEmpty().
// These windows can be returned in the Linux Aura port because the browser
// window which was used for dragging is not hidden once all of its tabs are
// attached to another browser window in DragBrowserToNewTabStrip().
// TODO(pkotwicz): Fix this properly (crbug.com/358482)
for (auto* browser : *BrowserList::GetInstance()) {
if (browser->tab_strip_model()->empty())
exclude.insert(browser->window()->GetNativeWindow());
}
#endif
base::WeakPtr<TabDragController> ref(weak_factory_.GetWeakPtr());
*window = window_finder_->GetLocalProcessWindowAtPoint(screen_point, exclude);
return ref ? Liveness::ALIVE : Liveness::DELETED;
}
void TabDragController::SetTabDraggingInfo() {
#if defined(OS_CHROMEOS)
TabDragContext* dragged_context =
attached_context_ ? attached_context_ : source_context_;
DCHECK(dragged_context->IsDragSessionActive() &&
current_state_ != DragState::kStopped);
aura::Window* dragged_window =
GetWindowForTabDraggingProperties(dragged_context);
aura::Window* source_window =
GetWindowForTabDraggingProperties(source_context_);
dragged_window->SetProperty(ash::kIsDraggingTabsKey, true);
if (source_window != dragged_window) {
dragged_window->SetProperty(ash::kTabDraggingSourceWindowKey,
source_window);
}
#endif
}
void TabDragController::ClearTabDraggingInfo() {
#if defined(OS_CHROMEOS)
TabDragContext* dragged_context =
attached_context_ ? attached_context_ : source_context_;
DCHECK(!dragged_context->IsDragSessionActive() ||
current_state_ == DragState::kStopped);
// Do not clear the dragging info properties for a to-be-destroyed window.
// They will be cleared later in Window's destructor. It's intentional as
// ash::SplitViewController::TabDraggedWindowObserver listens to both
// OnWindowDestroying() event and the window properties change event, and uses
// the two events to decide what to do next.
if (dragged_context->GetTabStripModel()->empty())
return;
aura::Window* dragged_window =
GetWindowForTabDraggingProperties(dragged_context);
dragged_window->ClearProperty(ash::kIsDraggingTabsKey);
dragged_window->ClearProperty(ash::kTabDraggingSourceWindowKey);
#endif
}
bool TabDragController::ShouldDisallowDrag(gfx::NativeWindow window) {
#if defined(USE_AURA)
return wm::GetModalTransient(window) != nullptr;
#else
TabDragContext* context = GetContextForWindow(window);
if (!context)
return true;
TabStripModel* model = context->GetTabStripModel();
DCHECK(model);
return model->IsTabBlocked(model->active_index());
#endif
}
void TabDragController::SetDeferredTargetTabstrip(
TabDragContext* deferred_target_context) {
#if defined(OS_CHROMEOS)
if (!deferred_target_context_observer_) {
deferred_target_context_observer_ =
std::make_unique<DeferredTargetTabstripObserver>();
}
deferred_target_context_observer_->SetDeferredTargetTabstrip(
deferred_target_context);
#endif
}