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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/fullscreen_mode_controller.h"
#import "chrome/browser/ui/cocoa/browser_window_controller.h"
#import "chrome/browser/ui/cocoa/browser_window_controller_private.h"
#import "chrome/browser/ui/cocoa/fast_resize_view.h"
@interface FullscreenModeController (Private)
- (void)startAnimationToState:(FullscreenToolbarState)state;
- (void)setMenuBarRevealProgress:(CGFloat)progress;
- (void)setRevealAnimationProgress:(NSAnimationProgress)progress;
@end
namespace {
OSStatus MenuBarRevealHandler(EventHandlerCallRef handler,
EventRef event,
void* context) {
FullscreenModeController* self =
static_cast<FullscreenModeController*>(context);
CGFloat revealFraction = 0;
GetEventParameter(event, FOUR_CHAR_CODE('rvlf'), typeCGFloat, NULL,
sizeof(CGFloat), NULL, &revealFraction);
[self setMenuBarRevealProgress:revealFraction];
return CallNextEventHandler(handler, event);
}
// The duration of the animation to bring down the tabstrip.
const NSTimeInterval kAnimationDuration = 0.35;
// The height of the tracking area in which mouse entered/exit events will
// reveal the tabstrip.
const NSUInteger kTrackingAreaHeight = 100;
// There is a tiny gap between the window's max Y and the top of the screen,
// which will produce a mouse exit event when the menu bar should be revealed.
// This factor is the size of that gap plus padding.
const CGFloat kTrackingAreaMaxYEpsilon = 15;
} // namespace
// Animation ///////////////////////////////////////////////////////////////////
@interface FullscreenModeDropDownAnimation : NSAnimation {
FullscreenModeController* controller_;
}
@end
@implementation FullscreenModeDropDownAnimation
- (id)initWithFullscreenModeController:(FullscreenModeController*)controller {
if ((self = [super initWithDuration:kAnimationDuration
animationCurve:NSAnimationEaseInOut])) {
controller_ = controller;
[self setAnimationBlockingMode:NSAnimationNonblocking];
[self setDelegate:controller_];
}
return self;
}
- (void)setCurrentProgress:(NSAnimationProgress)progress {
[controller_ setRevealAnimationProgress:progress];
}
@end
// Implementation //////////////////////////////////////////////////////////////
@implementation FullscreenModeController
- (id)initWithBrowserWindowController:(BrowserWindowController*)bwc {
if ((self = [super init])) {
controller_ = bwc;
currentState_ = kFullscreenToolbarOnly;
destinationState_ = kFullscreenToolbarOnly;
// Create the tracking area at the top of the window.
NSRect windowFrame = [[bwc window] frame];
NSRect trackingRect = NSMakeRect(
0, NSHeight(windowFrame) - kTrackingAreaHeight,
NSWidth(windowFrame), kTrackingAreaHeight);
trackingArea_.reset(
[[CrTrackingArea alloc] initWithRect:trackingRect
options:NSTrackingMouseEnteredAndExited |
NSTrackingActiveAlways
owner:self
userInfo:nil]);
[[[bwc window] contentView] addTrackingArea:trackingArea_.get()];
// Install the Carbon event handler for the undocumented menu bar show/hide
// event.
EventTypeSpec eventSpec = { kEventClassMenu, 2004 };
InstallApplicationEventHandler(NewEventHandlerUPP(&MenuBarRevealHandler),
1, &eventSpec,
self, &menuBarTrackingHandler_);
}
return self;
}
- (void)dealloc {
RemoveEventHandler(menuBarTrackingHandler_);
[[[controller_ window] contentView] removeTrackingArea:trackingArea_.get()];
[super dealloc];
}
- (CGFloat)menuBarHeight {
// -[NSMenu menuBarHeight] will return 0 when the menu bar is hidden, so
// use the status bar API instead, which always returns a constant value.
return [[NSStatusBar systemStatusBar] thickness] * menuBarRevealFraction_;
}
- (void)mouseEntered:(NSEvent*)event {
if (animation_ || currentState_ == kFullscreenToolbarAndTabstrip)
return;
[self startAnimationToState:kFullscreenToolbarAndTabstrip];
}
- (void)mouseExited:(NSEvent*)event {
if (animation_ || currentState_ == kFullscreenToolbarOnly)
return;
// Take allowance for the small gap between the window max Y and top edge of
// the screen.
NSPoint mousePoint = [NSEvent mouseLocation];
NSRect screenRect = [[[controller_ window] screen] frame];
if (mousePoint.y >= NSMaxY(screenRect) - kTrackingAreaMaxYEpsilon)
return;
[self startAnimationToState:kFullscreenToolbarOnly];
}
- (void)startAnimationToState:(FullscreenToolbarState)state {
DCHECK_NE(currentState_, state);
destinationState_ = state;
// Turn on fast resize mode to ensure a smooth web contents animation.
// TODO(rsesek): This makes the animation jump at the end.
[[controller_ tabContentArea] setFastResizeMode:YES];
animation_.reset([[FullscreenModeDropDownAnimation alloc]
initWithFullscreenModeController:self]);
[animation_ startAnimation];
}
- (void)setMenuBarRevealProgress:(CGFloat)progress {
menuBarRevealFraction_ = progress;
// If an animation is not running, then -layoutSubviews will not be called
// for each tick of the menu bar reveal. Do that manually.
// TODO(rsesek): This is kind of hacky and janky.
if (!animation_)
[controller_ layoutSubviews];
}
- (void)setRevealAnimationProgress:(NSAnimationProgress)progress {
// When hiding the tabstrip, invert the fraction.
if (destinationState_ == kFullscreenToolbarOnly)
progress = 1.0 - progress;
[controller_ setFloatingBarShownFraction:progress];
}
- (void)animationDidEnd:(NSAnimation*)animation {
DCHECK_EQ(animation_.get(), animation);
currentState_ = destinationState_;
[animation_ setDelegate:nil];
animation_.reset();
[[controller_ tabContentArea] setFastResizeMode:NO];
}
@end
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