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// Copyright 2013 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.
#import "chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h"
#include "base/logging.h"
#include "base/thread_task_runner_handle.h"
#include "content/public/browser/user_metrics.h"
#include "ui/gfx/animation/animation.h"
#include "ui/gfx/animation/animation_delegate.h"
#include "ui/gfx/image/image.h"
@implementation MediaIndicatorButton
class FadeAnimationDelegate : public gfx::AnimationDelegate {
public:
explicit FadeAnimationDelegate(MediaIndicatorButton* button)
: button_(button) {}
~FadeAnimationDelegate() override {}
private:
// gfx::AnimationDelegate implementation.
void AnimationProgressed(const gfx::Animation* animation) override {
[button_ setNeedsDisplay:YES];
}
void AnimationCanceled(const gfx::Animation* animation) override {
AnimationEnded(animation);
}
void AnimationEnded(const gfx::Animation* animation) override {
button_->showingMediaState_ = button_->mediaState_;
[button_ setNeedsDisplay:YES];
[button_->animationDoneTarget_
performSelector:button_->animationDoneAction_];
}
MediaIndicatorButton* const button_;
DISALLOW_COPY_AND_ASSIGN(FadeAnimationDelegate);
};
@synthesize showingMediaState = showingMediaState_;
- (id)init {
if ((self = [super initWithFrame:NSZeroRect])) {
mediaState_ = TAB_MEDIA_STATE_NONE;
showingMediaState_ = TAB_MEDIA_STATE_NONE;
[self setEnabled:NO];
[super setTarget:self];
[super setAction:@selector(handleClick:)];
}
return self;
}
- (void)removeFromSuperview {
fadeAnimation_.reset();
[super removeFromSuperview];
}
- (void)transitionToMediaState:(TabMediaState)nextState {
if (nextState == mediaState_)
return;
if (nextState != TAB_MEDIA_STATE_NONE) {
[self setImage:chrome::GetTabMediaIndicatorImage(nextState).ToNSImage()];
affordanceImage_.reset(
[chrome::GetTabMediaIndicatorAffordanceImage(nextState).ToNSImage()
retain]);
}
if ((mediaState_ == TAB_MEDIA_STATE_AUDIO_PLAYING &&
nextState == TAB_MEDIA_STATE_AUDIO_MUTING) ||
(mediaState_ == TAB_MEDIA_STATE_AUDIO_MUTING &&
nextState == TAB_MEDIA_STATE_AUDIO_PLAYING) ||
(mediaState_ == TAB_MEDIA_STATE_AUDIO_MUTING &&
nextState == TAB_MEDIA_STATE_NONE)) {
// Instant user feedback: No fade animation.
showingMediaState_ = nextState;
fadeAnimation_.reset();
} else {
if (nextState == TAB_MEDIA_STATE_NONE)
showingMediaState_ = mediaState_; // Fading-out indicator.
else
showingMediaState_ = nextState; // Fading-in to next indicator.
// gfx::Animation requires a task runner is available for the current
// thread. Generally, only certain unit tests would not instantiate a task
// runner.
if (base::ThreadTaskRunnerHandle::IsSet()) {
fadeAnimation_ = chrome::CreateTabMediaIndicatorFadeAnimation(nextState);
if (!fadeAnimationDelegate_)
fadeAnimationDelegate_.reset(new FadeAnimationDelegate(self));
fadeAnimation_->set_delegate(fadeAnimationDelegate_.get());
fadeAnimation_->Start();
}
}
[self setEnabled:(chrome::IsTabAudioMutingFeatureEnabled() &&
(nextState == TAB_MEDIA_STATE_AUDIO_PLAYING ||
nextState == TAB_MEDIA_STATE_AUDIO_MUTING))];
// An indicator state change should be made visible immediately, instead of
// the user being surprised when their mouse leaves the button.
if ([self hoverState] == kHoverStateMouseOver)
[self setHoverState:kHoverStateNone];
mediaState_ = nextState;
[self setNeedsDisplay:YES];
}
- (void)setTarget:(id)aTarget {
NOTREACHED(); // See class-level comments.
}
- (void)setAction:(SEL)anAction {
NOTREACHED(); // See class-level comments.
}
- (void)setAnimationDoneTarget:(id)target withAction:(SEL)action {
animationDoneTarget_ = target;
animationDoneAction_ = action;
}
- (void)setClickTarget:(id)target withAction:(SEL)action {
clickTarget_ = target;
clickAction_ = action;
}
- (void)drawRect:(NSRect)dirtyRect {
NSImage* image = ([self hoverState] == kHoverStateNone || ![self isEnabled]) ?
[self image] : affordanceImage_.get();
if (!image)
return;
NSRect imageRect = NSZeroRect;
imageRect.size = [image size];
NSRect destRect = [self bounds];
destRect.origin.y =
floor((NSHeight(destRect) / 2) - (NSHeight(imageRect) / 2));
destRect.size = imageRect.size;
double opaqueness =
fadeAnimation_ ? fadeAnimation_->GetCurrentValue() : 1.0;
if (mediaState_ == TAB_MEDIA_STATE_NONE)
opaqueness = 1.0 - opaqueness; // Fading out, not in.
[image drawInRect:destRect
fromRect:imageRect
operation:NSCompositeSourceOver
fraction:opaqueness
respectFlipped:YES
hints:nil];
}
// When disabled, the superview should receive all mouse events.
- (NSView*)hitTest:(NSPoint)aPoint {
if ([self isEnabled] && ![self isHidden])
return [super hitTest:aPoint];
else
return nil;
}
- (void)handleClick:(id)sender {
using base::UserMetricsAction;
if (mediaState_ == TAB_MEDIA_STATE_AUDIO_PLAYING)
content::RecordAction(UserMetricsAction("MediaIndicatorButton_Mute"));
else if (mediaState_ == TAB_MEDIA_STATE_AUDIO_MUTING)
content::RecordAction(UserMetricsAction("MediaIndicatorButton_Unmute"));
else
NOTREACHED();
[clickTarget_ performSelector:clickAction_ withObject:self];
}
@end
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