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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/wm/base_state.h"
#include "ash/public/cpp/window_animation_types.h"
#include "ash/public/cpp/window_properties.h"
#include "ash/screen_util.h"
#include "ash/shell.h"
#include "ash/strings/grit/ash_strings.h"
#include "ash/wm/overview/overview_controller.h"
#include "ash/wm/splitview/split_view_controller.h"
#include "ash/wm/splitview/split_view_utils.h"
#include "ash/wm/tablet_mode/tablet_mode_controller.h"
#include "ash/wm/window_positioning_utils.h"
#include "ash/wm/window_util.h"
#include "ash/wm/wm_metrics.h"
#include "chromeos/ui/base/window_state_type.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
namespace ash {
using ::chromeos::WindowStateType;
BaseState::BaseState(WindowStateType initial_state_type)
: state_type_(initial_state_type) {}
BaseState::~BaseState() = default;
void BaseState::OnWMEvent(WindowState* window_state, const WMEvent* event) {
if (event->IsWorkspaceEvent()) {
HandleWorkspaceEvents(window_state, event);
if (window_state->IsSnapped() && !window_state->CanSnap())
window_state->Restore();
return;
}
if ((window_state->IsTrustedPinned() || window_state->IsPinned()) &&
(event->type() != WM_EVENT_NORMAL && event->type() != WM_EVENT_RESTORE &&
event->IsTransitionEvent())) {
// PIN state can be exited only by normal event or restore event.
return;
}
if (event->IsCompoundEvent()) {
HandleCompoundEvents(window_state, event);
return;
}
if (event->IsBoundsEvent()) {
HandleBoundsEvents(window_state, event);
return;
}
DCHECK(event->IsTransitionEvent());
HandleTransitionEvents(window_state, event);
}
WindowStateType BaseState::GetType() const {
return state_type_;
}
// static
WindowStateType BaseState::GetStateForTransitionEvent(WindowState* window_state,
const WMEvent* event) {
switch (event->type()) {
case WM_EVENT_NORMAL:
if (window_state->window()->GetProperty(aura::client::kIsRestoringKey))
return window_state->GetRestoreWindowState();
return WindowStateType::kNormal;
case WM_EVENT_MAXIMIZE:
return WindowStateType::kMaximized;
case WM_EVENT_MINIMIZE:
return WindowStateType::kMinimized;
case WM_EVENT_FULLSCREEN:
return WindowStateType::kFullscreen;
case WM_EVENT_SNAP_PRIMARY:
return WindowStateType::kPrimarySnapped;
case WM_EVENT_SNAP_SECONDARY:
return WindowStateType::kSecondarySnapped;
case WM_EVENT_RESTORE:
return window_state->GetRestoreWindowState();
case WM_EVENT_SHOW_INACTIVE:
return WindowStateType::kInactive;
case WM_EVENT_PIN:
return WindowStateType::kPinned;
case WM_EVENT_PIP:
return WindowStateType::kPip;
case WM_EVENT_FLOAT:
return WindowStateType::kFloated;
case WM_EVENT_TRUSTED_PIN:
return WindowStateType::kTrustedPinned;
default:
break;
}
#if !defined(NDEBUG)
if (event->IsWorkspaceEvent())
NOTREACHED() << "Can't get the state for Workspace event" << event->type();
if (event->IsCompoundEvent())
NOTREACHED() << "Can't get the state for Compound event:" << event->type();
if (event->IsBoundsEvent())
NOTREACHED() << "Can't get the state for Bounds event:" << event->type();
#endif
return WindowStateType::kNormal;
}
// static
void BaseState::CycleSnap(WindowState* window_state, WMEventType event) {
auto* shell = Shell::Get();
// For tablet mode, use |TabletModeWindowState::CycleTabletSnap|.
DCHECK(!shell->tablet_mode_controller()->InTabletMode());
WindowStateType desired_snap_state = event == WM_EVENT_CYCLE_SNAP_PRIMARY
? WindowStateType::kPrimarySnapped
: WindowStateType::kSecondarySnapped;
aura::Window* window = window_state->window();
// If |window| can be snapped but is not currently in |desired_snap_state|,
// then snap |window| to the side that corresponds to |desired_snap_state|.
if (window_state->CanSnap() &&
window_state->GetStateType() != desired_snap_state) {
const bool is_desired_primary_snapped =
desired_snap_state == WindowStateType::kPrimarySnapped;
if (shell->overview_controller()->InOverviewSession() &&
!window_util::IsFasterSplitScreenOrSnapGroupArm1Enabled()) {
// |window| must already be in split view, and so we do not need to check
// |SplitViewController::CanSnapWindow|, although in general it is more
// restrictive than |WindowState::CanSnap|.
DCHECK(SplitViewController::Get(window)->IsWindowInSplitView(window));
SplitViewController::Get(window)->SnapWindow(
window,
is_desired_primary_snapped
? SplitViewController::SnapPosition::kPrimary
: SplitViewController::SnapPosition::kSecondary,
WindowSnapActionSource::kKeyboardShortcutToSnap);
} else {
const WindowSnapWMEvent wm_event(
is_desired_primary_snapped ? WM_EVENT_SNAP_PRIMARY
: WM_EVENT_SNAP_SECONDARY,
WindowSnapActionSource::kKeyboardShortcutToSnap);
window_state->OnWMEvent(&wm_event);
}
window_state->ReadOutWindowCycleSnapAction(
is_desired_primary_snapped ? IDS_WM_SNAP_WINDOW_TO_LEFT_ON_SHORTCUT
: IDS_WM_SNAP_WINDOW_TO_RIGHT_ON_SHORTCUT);
return;
}
// If |window| is already in |desired_snap_state|, then unsnap |window|.
if (window_state->IsSnapped()) {
window_state->Restore();
window_state->ReadOutWindowCycleSnapAction(
IDS_WM_RESTORE_SNAPPED_WINDOW_ON_SHORTCUT);
return;
}
// If |window| cannot be snapped, then do a window bounce animation.
DCHECK(!window_state->CanSnap());
::wm::AnimateWindow(window, ::wm::WINDOW_ANIMATION_TYPE_BOUNCE);
}
void BaseState::UpdateMinimizedState(WindowState* window_state,
WindowStateType previous_state_type) {
aura::Window* window = window_state->window();
if (window_state->IsMinimized()) {
// Count minimizing a PIP window as dismissing it. Android apps in PIP mode
// don't exit when they are dismissed, they just go back to being a regular
// app, but minimized.
::wm::SetWindowVisibilityAnimationType(
window, previous_state_type == WindowStateType::kPip
? WINDOW_VISIBILITY_ANIMATION_TYPE_FADE_IN_SLIDE_OUT
: WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE);
window->Hide();
if (window_state->IsActive())
window_state->Deactivate();
} else if ((window->layer()->GetTargetVisibility() ||
IsMinimizedWindowStateType(previous_state_type)) &&
!window->layer()->visible()) {
// The layer may be hidden if the window was previously minimized. Make
// sure it's visible.
window->Show();
if (IsMinimizedWindowStateType(previous_state_type) &&
!window_state->IsMaximizedOrFullscreenOrPinned()) {
window_state->set_unminimize_to_restore_bounds(false);
}
}
}
gfx::Rect BaseState::GetSnappedWindowBoundsInParent(
aura::Window* window,
const WindowStateType state_type) {
return BaseState::GetSnappedWindowBoundsInParent(window, state_type,
chromeos::kDefaultSnapRatio);
}
gfx::Rect BaseState::GetSnappedWindowBoundsInParent(
aura::Window* window,
const WindowStateType state_type,
float snap_ratio) {
DCHECK(chromeos::IsSnappedWindowStateType(state_type));
gfx::Rect bounds_in_parent;
if (ShouldAllowSplitView()) {
bounds_in_parent =
SplitViewController::Get(window)->GetSnappedWindowBoundsInParent(
(state_type == WindowStateType::kPrimarySnapped)
? SplitViewController::SnapPosition::kPrimary
: SplitViewController::SnapPosition::kSecondary,
window, snap_ratio);
} else {
// Use `window_positioning_utils` to calculate the snapped window bounds.
bounds_in_parent = ash::GetSnappedWindowBoundsInParent(
window,
state_type == WindowStateType::kPrimarySnapped
? SnapViewType::kPrimary
: SnapViewType::kSecondary,
snap_ratio);
}
return bounds_in_parent;
}
void BaseState::HandleWindowSnapping(
WindowState* window_state,
WMEventType event_type,
WindowSnapActionSource snap_action_source) {
DCHECK(event_type == WM_EVENT_SNAP_PRIMARY ||
event_type == WM_EVENT_SNAP_SECONDARY);
DCHECK(window_state->CanSnap());
window_state->set_bounds_changed_by_user(true);
aura::Window* window = window_state->window();
// `SplitViewController` will decide if the window needs to be snapped in
// split view.
SplitViewController::Get(window)->OnSnapEvent(window, event_type,
snap_action_source);
}
} // namespace ash
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