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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 "ash/wm/workspace/workspace_animations.h"
#include "ash/ash_switches.h"
#include "base/command_line.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
namespace ash {
namespace internal {
const int kWorkspaceSwitchTimeMS = 200;
namespace {
// Tween type used when showing/hiding workspaces.
const ui::Tween::Type kWorkspaceTweenType = ui::Tween::EASE_OUT;
// Scales for workspaces above/below current workspace.
const float kWorkspaceScaleAbove = 1.1f;
const float kWorkspaceScaleBelow = .9f;
enum WorkspaceScaleType {
WORKSPACE_SCALE_ABOVE,
WORKSPACE_SCALE_BELOW,
};
// Applies the specified WorkspaceScaleType.
void ApplyWorkspaceScale(ui::Layer* layer, WorkspaceScaleType type) {
const float scale = type == WORKSPACE_SCALE_ABOVE ? kWorkspaceScaleAbove :
kWorkspaceScaleBelow;
gfx::Transform transform;
transform.ConcatScale(scale, scale);
transform.ConcatTranslate(
-layer->bounds().width() * (scale - 1.0f) / 2,
-layer->bounds().height() * (scale - 1.0f) / 2);
layer->SetTransform(transform);
}
// If |details.duration| is not-empty it is returned, otherwise
// |kWorkspaceSwitchTimeMS| is returned.
base::TimeDelta DurationForWorkspaceShowOrHide(
const WorkspaceAnimationDetails& details) {
return details.duration == base::TimeDelta() ?
base::TimeDelta::FromMilliseconds(kWorkspaceSwitchTimeMS) :
details.duration;
}
} // namespace
WorkspaceAnimationDetails::WorkspaceAnimationDetails()
: direction(WORKSPACE_ANIMATE_UP),
animate(false),
animate_opacity(false),
animate_scale(false),
pause_time_ms(0) {
}
WorkspaceAnimationDetails::~WorkspaceAnimationDetails() {
}
void ShowWorkspace(aura::Window* window,
const WorkspaceAnimationDetails& details) {
window->Show();
if (!details.animate || CommandLine::ForCurrentProcess()->HasSwitch(
ash::switches::kAshWindowAnimationsDisabled)) {
window->layer()->SetOpacity(1.0f);
window->layer()->SetTransform(gfx::Transform());
return;
}
window->layer()->SetOpacity(details.animate_opacity ? 0.0f : 1.0f);
if (details.animate_scale) {
ApplyWorkspaceScale(window->layer(),
details.direction == WORKSPACE_ANIMATE_UP ?
WORKSPACE_SCALE_BELOW : WORKSPACE_SCALE_ABOVE);
} else {
window->layer()->SetTransform(gfx::Transform());
}
// In order for pause to work we need to stop animations.
window->layer()->GetAnimator()->StopAnimating();
{
ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
if (details.pause_time_ms > 0) {
settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
window->layer()->GetAnimator()->SchedulePauseForProperties(
base::TimeDelta::FromMilliseconds(details.pause_time_ms),
ui::LayerAnimationElement::TRANSFORM,
ui::LayerAnimationElement::OPACITY,
ui::LayerAnimationElement::BRIGHTNESS,
ui::LayerAnimationElement::VISIBILITY,
-1);
}
settings.SetTweenType(kWorkspaceTweenType);
settings.SetTransitionDuration(DurationForWorkspaceShowOrHide(details));
window->layer()->SetTransform(gfx::Transform());
window->layer()->SetOpacity(1.0f);
}
}
void HideWorkspace(aura::Window* window,
const WorkspaceAnimationDetails& details) {
window->layer()->SetTransform(gfx::Transform());
window->layer()->SetOpacity(1.0f);
window->layer()->GetAnimator()->StopAnimating();
if (!details.animate || CommandLine::ForCurrentProcess()->HasSwitch(
ash::switches::kAshWindowAnimationsDisabled)) {
window->Hide();
return;
}
ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
if (details.pause_time_ms > 0) {
settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
window->layer()->GetAnimator()->SchedulePauseForProperties(
base::TimeDelta::FromMilliseconds(details.pause_time_ms),
ui::LayerAnimationElement::TRANSFORM,
ui::LayerAnimationElement::OPACITY,
ui::LayerAnimationElement::BRIGHTNESS,
ui::LayerAnimationElement::VISIBILITY,
-1);
}
settings.SetTransitionDuration(DurationForWorkspaceShowOrHide(details));
settings.SetTweenType(kWorkspaceTweenType);
if (details.animate_scale) {
ApplyWorkspaceScale(window->layer(),
details.direction == WORKSPACE_ANIMATE_UP ?
WORKSPACE_SCALE_ABOVE : WORKSPACE_SCALE_BELOW);
} else {
window->layer()->SetTransform(gfx::Transform());
}
// NOTE: Hide() must be before SetOpacity(), else
// VisibilityController::UpdateLayerVisibility doesn't pass the false to the
// layer so that the layer and window end up out of sync and confused.
window->Hide();
if (details.animate_opacity)
window->layer()->SetOpacity(0.0f);
// After the animation completes snap the transform back to the identity,
// otherwise any one that asks for screen bounds gets a slightly scaled
// version.
settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
settings.SetTransitionDuration(base::TimeDelta());
window->layer()->SetTransform(gfx::Transform());
}
} // namespace internal
} // namespace ash
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