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|
// Copyright (c) 2009 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/cocoa/status_bubble_mac.h"
#include <limits>
#include "base/compiler_specific.h"
#include "base/message_loop.h"
#include "base/string_util.h"
#include "base/sys_string_conversions.h"
#include "base/utf_string_conversions.h"
#import "chrome/browser/ui/cocoa/bubble_view.h"
#include "net/base/net_util.h"
#import "third_party/GTM/AppKit/GTMNSAnimation+Duration.h"
#import "third_party/GTM/AppKit/GTMNSBezierPath+RoundRect.h"
#import "third_party/GTM/AppKit/GTMNSColor+Luminance.h"
#include "ui/base/text/text_elider.h"
#include "ui/gfx/point.h"
namespace {
const int kWindowHeight = 18;
// The width of the bubble in relation to the width of the parent window.
const CGFloat kWindowWidthPercent = 1.0 / 3.0;
// How close the mouse can get to the infobubble before it starts sliding
// off-screen.
const int kMousePadding = 20;
const int kTextPadding = 3;
// The animation key used for fade-in and fade-out transitions.
NSString* const kFadeAnimationKey = @"alphaValue";
// The status bubble's maximum opacity, when fully faded in.
const CGFloat kBubbleOpacity = 1.0;
// Delay before showing or hiding the bubble after a SetStatus or SetURL call.
const int64 kShowDelayMilliseconds = 80;
const int64 kHideDelayMilliseconds = 250;
// How long each fade should last.
const NSTimeInterval kShowFadeInDurationSeconds = 0.120;
const NSTimeInterval kHideFadeOutDurationSeconds = 0.200;
// The minimum representable time interval. This can be used as the value
// passed to +[NSAnimationContext setDuration:] to stop an in-progress
// animation as quickly as possible.
const NSTimeInterval kMinimumTimeInterval =
std::numeric_limits<NSTimeInterval>::min();
// How quickly the status bubble should expand, in seconds.
const CGFloat kExpansionDuration = 0.125;
} // namespace
@interface StatusBubbleAnimationDelegate : NSObject {
@private
StatusBubbleMac* statusBubble_; // weak; owns us indirectly
}
- (id)initWithStatusBubble:(StatusBubbleMac*)statusBubble;
// Invalidates this object so that no further calls will be made to
// statusBubble_. This should be called when statusBubble_ is released, to
// prevent attempts to call into the released object.
- (void)invalidate;
// CAAnimation delegate method
- (void)animationDidStop:(CAAnimation*)animation finished:(BOOL)finished;
@end
@implementation StatusBubbleAnimationDelegate
- (id)initWithStatusBubble:(StatusBubbleMac*)statusBubble {
if ((self = [super init])) {
statusBubble_ = statusBubble;
}
return self;
}
- (void)invalidate {
statusBubble_ = NULL;
}
- (void)animationDidStop:(CAAnimation*)animation finished:(BOOL)finished {
if (statusBubble_)
statusBubble_->AnimationDidStop(animation, finished ? true : false);
}
@end
StatusBubbleMac::StatusBubbleMac(NSWindow* parent, id delegate)
: ALLOW_THIS_IN_INITIALIZER_LIST(timer_factory_(this)),
ALLOW_THIS_IN_INITIALIZER_LIST(expand_timer_factory_(this)),
parent_(parent),
delegate_(delegate),
window_(nil),
status_text_(nil),
url_text_(nil),
state_(kBubbleHidden),
immediate_(false),
is_expanded_(false) {
Create();
Attach();
}
StatusBubbleMac::~StatusBubbleMac() {
DCHECK(window_);
Hide();
[[[window_ animationForKey:kFadeAnimationKey] delegate] invalidate];
Detach();
[window_ release];
window_ = nil;
}
void StatusBubbleMac::SetStatus(const string16& status) {
SetText(status, false);
}
void StatusBubbleMac::SetURL(const GURL& url, const string16& languages) {
url_ = url;
languages_ = languages;
NSRect frame = [window_ frame];
// Reset frame size when bubble is hidden.
if (state_ == kBubbleHidden) {
is_expanded_ = false;
frame.size.width = NSWidth(CalculateWindowFrame(/*expand=*/false));
[window_ setFrame:frame display:NO];
}
int text_width = static_cast<int>(NSWidth(frame) -
kBubbleViewTextPositionX -
kTextPadding);
// Scale from view to window coordinates before eliding URL string.
NSSize scaled_width = NSMakeSize(text_width, 0);
scaled_width = [[parent_ contentView] convertSize:scaled_width fromView:nil];
text_width = static_cast<int>(scaled_width.width);
NSFont* font = [[window_ contentView] font];
gfx::Font font_chr(base::SysNSStringToUTF16([font fontName]),
[font pointSize]);
string16 original_url_text = net::FormatUrl(url, UTF16ToUTF8(languages));
string16 status = ui::ElideUrl(url, font_chr, text_width,
UTF16ToUTF8(languages));
SetText(status, true);
// In testing, don't use animation. When ExpandBubble is tested, it is
// called explicitly.
if (immediate_)
return;
else
CancelExpandTimer();
// If the bubble has been expanded, the user has already hovered over a link
// to trigger the expanded state. Don't wait to change the bubble in this
// case -- immediately expand or contract to fit the URL.
if (is_expanded_ && !url.is_empty()) {
ExpandBubble();
} else if (original_url_text.length() > status.length()) {
MessageLoop::current()->PostDelayedTask(FROM_HERE,
expand_timer_factory_.NewRunnableMethod(
&StatusBubbleMac::ExpandBubble), kExpandHoverDelay);
}
}
void StatusBubbleMac::SetText(const string16& text, bool is_url) {
// The status bubble allows the status and URL strings to be set
// independently. Whichever was set non-empty most recently will be the
// value displayed. When both are empty, the status bubble hides.
NSString* text_ns = base::SysUTF16ToNSString(text);
NSString** main;
NSString** backup;
if (is_url) {
main = &url_text_;
backup = &status_text_;
} else {
main = &status_text_;
backup = &url_text_;
}
// Don't return from this function early. It's important to make sure that
// all calls to StartShowing and StartHiding are made, so that all delays
// are observed properly. Specifically, if the state is currently
// kBubbleShowingTimer, the timer will need to be restarted even if
// [text_ns isEqualToString:*main] is true.
[*main autorelease];
*main = [text_ns retain];
bool show = true;
if ([*main length] > 0)
[[window_ contentView] setContent:*main];
else if ([*backup length] > 0)
[[window_ contentView] setContent:*backup];
else
show = false;
if (show)
StartShowing();
else
StartHiding();
}
void StatusBubbleMac::Hide() {
CancelTimer();
CancelExpandTimer();
is_expanded_ = false;
bool fade_out = false;
if (state_ == kBubbleHidingFadeOut || state_ == kBubbleShowingFadeIn) {
SetState(kBubbleHidingFadeOut);
if (!immediate_) {
// An animation is in progress. Cancel it by starting a new animation.
// Use kMinimumTimeInterval to set the opacity as rapidly as possible.
fade_out = true;
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:kMinimumTimeInterval];
[[window_ animator] setAlphaValue:0.0];
[NSAnimationContext endGrouping];
}
}
if (!fade_out) {
// No animation is in progress, so the opacity can be set directly.
[window_ setAlphaValue:0.0];
SetState(kBubbleHidden);
}
// Stop any width animation and reset the bubble size.
if (!immediate_) {
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:kMinimumTimeInterval];
[[window_ animator] setFrame:CalculateWindowFrame(/*expand=*/false)
display:NO];
[NSAnimationContext endGrouping];
} else {
[window_ setFrame:CalculateWindowFrame(/*expand=*/false) display:NO];
}
[status_text_ release];
status_text_ = nil;
[url_text_ release];
url_text_ = nil;
}
void StatusBubbleMac::MouseMoved(
const gfx::Point& location, bool left_content) {
if (left_content)
return;
if (!window_)
return;
// TODO(thakis): Use 'location' here instead of NSEvent.
NSPoint cursor_location = [NSEvent mouseLocation];
--cursor_location.y; // docs say the y coord starts at 1 not 0; don't ask why
// Bubble's base frame in |parent_| coordinates.
NSRect baseFrame;
if ([delegate_ respondsToSelector:@selector(statusBubbleBaseFrame)])
baseFrame = [delegate_ statusBubbleBaseFrame];
else
baseFrame = [[parent_ contentView] frame];
// Get the normal position of the frame.
NSRect window_frame = [window_ frame];
window_frame.origin = [parent_ convertBaseToScreen:baseFrame.origin];
// Get the cursor position relative to the popup.
cursor_location.x -= NSMaxX(window_frame);
cursor_location.y -= NSMaxY(window_frame);
// If the mouse is in a position where we think it would move the
// status bubble, figure out where and how the bubble should be moved.
if (cursor_location.y < kMousePadding &&
cursor_location.x < kMousePadding) {
int offset = kMousePadding - cursor_location.y;
// Make the movement non-linear.
offset = offset * offset / kMousePadding;
// When the mouse is entering from the right, we want the offset to be
// scaled by how horizontally far away the cursor is from the bubble.
if (cursor_location.x > 0) {
offset = offset * ((kMousePadding - cursor_location.x) / kMousePadding);
}
bool isOnScreen = true;
NSScreen* screen = [window_ screen];
if (screen &&
NSMinY([screen visibleFrame]) > NSMinY(window_frame) - offset) {
isOnScreen = false;
}
// If something is shown below tab contents (devtools, download shelf etc.),
// adjust the position to sit on top of it.
bool isAnyShelfVisible = NSMinY(baseFrame) > 0;
if (isOnScreen && !isAnyShelfVisible) {
// Cap the offset and change the visual presentation of the bubble
// depending on where it ends up (so that rounded corners square off
// and mate to the edges of the tab content).
if (offset >= NSHeight(window_frame)) {
offset = NSHeight(window_frame);
[[window_ contentView] setCornerFlags:
kRoundedBottomLeftCorner | kRoundedBottomRightCorner];
} else if (offset > 0) {
[[window_ contentView] setCornerFlags:
kRoundedTopRightCorner | kRoundedBottomLeftCorner |
kRoundedBottomRightCorner];
} else {
[[window_ contentView] setCornerFlags:kRoundedTopRightCorner];
}
window_frame.origin.y -= offset;
} else {
// Cannot move the bubble down without obscuring other content.
// Move it to the right instead.
[[window_ contentView] setCornerFlags:kRoundedTopLeftCorner];
// Subtract border width + bubble width.
window_frame.origin.x += NSWidth(baseFrame) - NSWidth(window_frame);
}
} else {
[[window_ contentView] setCornerFlags:kRoundedTopRightCorner];
}
[window_ setFrame:window_frame display:YES];
}
void StatusBubbleMac::UpdateDownloadShelfVisibility(bool visible) {
}
void StatusBubbleMac::Create() {
DCHECK(!window_);
window_ = [[NSWindow alloc] initWithContentRect:NSZeroRect
styleMask:NSBorderlessWindowMask
backing:NSBackingStoreBuffered
defer:YES];
[window_ setMovableByWindowBackground:NO];
[window_ setBackgroundColor:[NSColor clearColor]];
[window_ setLevel:NSNormalWindowLevel];
[window_ setOpaque:NO];
[window_ setHasShadow:NO];
// We do not need to worry about the bubble outliving |parent_| because our
// teardown sequence in BWC guarantees that |parent_| outlives the status
// bubble and that the StatusBubble is torn down completely prior to the
// window going away.
scoped_nsobject<BubbleView> view(
[[BubbleView alloc] initWithFrame:NSZeroRect themeProvider:parent_]);
[window_ setContentView:view];
[window_ setAlphaValue:0.0];
// Set a delegate for the fade-in and fade-out transitions to be notified
// when fades are complete. The ownership model is for window_ to own
// animation_dictionary, which owns animation, which owns
// animation_delegate.
CAAnimation* animation = [[window_ animationForKey:kFadeAnimationKey] copy];
[animation autorelease];
StatusBubbleAnimationDelegate* animation_delegate =
[[StatusBubbleAnimationDelegate alloc] initWithStatusBubble:this];
[animation_delegate autorelease];
[animation setDelegate:animation_delegate];
NSMutableDictionary* animation_dictionary =
[NSMutableDictionary dictionaryWithDictionary:[window_ animations]];
[animation_dictionary setObject:animation forKey:kFadeAnimationKey];
[window_ setAnimations:animation_dictionary];
[view setCornerFlags:kRoundedTopRightCorner];
MouseMoved(gfx::Point(), false);
}
void StatusBubbleMac::Attach() {
DCHECK(!is_attached());
[parent_ addChildWindow:window_ ordered:NSWindowAbove];
[[window_ contentView] setThemeProvider:parent_];
}
void StatusBubbleMac::Detach() {
DCHECK(is_attached());
// Magic setFrame: See crbug.com/58506, and codereview.chromium.org/3564021
[window_ setFrame:CalculateWindowFrame(/*expand=*/false) display:NO];
[parent_ removeChildWindow:window_]; // See crbug.com/28107 ...
[window_ orderOut:nil]; // ... and crbug.com/29054.
[[window_ contentView] setThemeProvider:nil];
}
void StatusBubbleMac::AnimationDidStop(CAAnimation* animation, bool finished) {
DCHECK([NSThread isMainThread]);
DCHECK(state_ == kBubbleShowingFadeIn || state_ == kBubbleHidingFadeOut);
DCHECK(is_attached());
if (finished) {
// Because of the mechanism used to interrupt animations, this is never
// actually called with finished set to false. If animations ever become
// directly interruptible, the check will ensure that state_ remains
// properly synchronized.
if (state_ == kBubbleShowingFadeIn) {
DCHECK_EQ([[window_ animator] alphaValue], kBubbleOpacity);
SetState(kBubbleShown);
} else {
DCHECK_EQ([[window_ animator] alphaValue], 0.0);
SetState(kBubbleHidden);
}
}
}
void StatusBubbleMac::SetState(StatusBubbleState state) {
if (state == state_)
return;
if (state == kBubbleHidden)
[window_ setFrame:NSZeroRect display:YES];
else
UpdateSizeAndPosition();
if ([delegate_ respondsToSelector:@selector(statusBubbleWillEnterState:)])
[delegate_ statusBubbleWillEnterState:state];
state_ = state;
}
void StatusBubbleMac::Fade(bool show) {
DCHECK([NSThread isMainThread]);
StatusBubbleState fade_state = kBubbleShowingFadeIn;
StatusBubbleState target_state = kBubbleShown;
NSTimeInterval full_duration = kShowFadeInDurationSeconds;
CGFloat opacity = kBubbleOpacity;
if (!show) {
fade_state = kBubbleHidingFadeOut;
target_state = kBubbleHidden;
full_duration = kHideFadeOutDurationSeconds;
opacity = 0.0;
}
DCHECK(state_ == fade_state || state_ == target_state);
if (state_ == target_state)
return;
if (immediate_) {
[window_ setAlphaValue:opacity];
SetState(target_state);
return;
}
// If an incomplete transition has left the opacity somewhere between 0 and
// kBubbleOpacity, the fade rate is kept constant by shortening the duration.
NSTimeInterval duration =
full_duration *
fabs(opacity - [[window_ animator] alphaValue]) / kBubbleOpacity;
// 0.0 will not cancel an in-progress animation.
if (duration == 0.0)
duration = kMinimumTimeInterval;
// This will cancel an in-progress transition and replace it with this fade.
[NSAnimationContext beginGrouping];
// Don't use the GTM additon for the "Steve" slowdown because this can happen
// async from user actions and the effects could be a surprise.
[[NSAnimationContext currentContext] setDuration:duration];
[[window_ animator] setAlphaValue:opacity];
[NSAnimationContext endGrouping];
}
void StatusBubbleMac::StartTimer(int64 delay_ms) {
DCHECK([NSThread isMainThread]);
DCHECK(state_ == kBubbleShowingTimer || state_ == kBubbleHidingTimer);
if (immediate_) {
TimerFired();
return;
}
// There can only be one running timer.
CancelTimer();
MessageLoop::current()->PostDelayedTask(
FROM_HERE,
timer_factory_.NewRunnableMethod(&StatusBubbleMac::TimerFired),
delay_ms);
}
void StatusBubbleMac::CancelTimer() {
DCHECK([NSThread isMainThread]);
if (!timer_factory_.empty())
timer_factory_.RevokeAll();
}
void StatusBubbleMac::TimerFired() {
DCHECK(state_ == kBubbleShowingTimer || state_ == kBubbleHidingTimer);
DCHECK([NSThread isMainThread]);
if (state_ == kBubbleShowingTimer) {
SetState(kBubbleShowingFadeIn);
Fade(true);
} else {
SetState(kBubbleHidingFadeOut);
Fade(false);
}
}
void StatusBubbleMac::StartShowing() {
if (state_ == kBubbleHidden) {
// Arrange to begin fading in after a delay.
SetState(kBubbleShowingTimer);
StartTimer(kShowDelayMilliseconds);
} else if (state_ == kBubbleHidingFadeOut) {
// Cancel the fade-out in progress and replace it with a fade in.
SetState(kBubbleShowingFadeIn);
Fade(true);
} else if (state_ == kBubbleHidingTimer) {
// The bubble was already shown but was waiting to begin fading out. It's
// given a stay of execution.
SetState(kBubbleShown);
CancelTimer();
} else if (state_ == kBubbleShowingTimer) {
// The timer was already running but nothing was showing yet. Reaching
// this point means that there is a new request to show something. Start
// over again by resetting the timer, effectively invalidating the earlier
// request.
StartTimer(kShowDelayMilliseconds);
}
// If the state is kBubbleShown or kBubbleShowingFadeIn, leave everything
// alone.
}
void StatusBubbleMac::StartHiding() {
if (state_ == kBubbleShown) {
// Arrange to begin fading out after a delay.
SetState(kBubbleHidingTimer);
StartTimer(kHideDelayMilliseconds);
} else if (state_ == kBubbleShowingFadeIn) {
// Cancel the fade-in in progress and replace it with a fade out.
SetState(kBubbleHidingFadeOut);
Fade(false);
} else if (state_ == kBubbleShowingTimer) {
// The bubble was already hidden but was waiting to begin fading in. Too
// bad, it won't get the opportunity now.
SetState(kBubbleHidden);
CancelTimer();
}
// If the state is kBubbleHidden, kBubbleHidingFadeOut, or
// kBubbleHidingTimer, leave everything alone. The timer is not reset as
// with kBubbleShowingTimer in StartShowing() because a subsequent request
// to hide something while one is already in flight does not invalidate the
// earlier request.
}
void StatusBubbleMac::CancelExpandTimer() {
DCHECK([NSThread isMainThread]);
expand_timer_factory_.RevokeAll();
}
void StatusBubbleMac::ExpandBubble() {
// Calculate the width available for expanded and standard bubbles.
NSRect window_frame = CalculateWindowFrame(/*expand=*/true);
CGFloat max_bubble_width = NSWidth(window_frame);
CGFloat standard_bubble_width =
NSWidth(CalculateWindowFrame(/*expand=*/false));
// Generate the URL string that fits in the expanded bubble.
NSFont* font = [[window_ contentView] font];
gfx::Font font_chr(base::SysNSStringToUTF16([font fontName]),
[font pointSize]);
string16 expanded_url = ui::ElideUrl(url_, font_chr,
max_bubble_width, UTF16ToUTF8(languages_));
// Scale width from gfx::Font in view coordinates to window coordinates.
int required_width_for_string =
font_chr.GetStringWidth(expanded_url) +
kTextPadding * 2 + kBubbleViewTextPositionX;
NSSize scaled_width = NSMakeSize(required_width_for_string, 0);
scaled_width = [[parent_ contentView] convertSize:scaled_width toView:nil];
required_width_for_string = scaled_width.width;
// The expanded width must be at least as wide as the standard width, but no
// wider than the maximum width for its parent frame.
int expanded_bubble_width =
std::max(standard_bubble_width,
std::min(max_bubble_width,
static_cast<CGFloat>(required_width_for_string)));
SetText(expanded_url, true);
is_expanded_ = true;
window_frame.size.width = expanded_bubble_width;
// In testing, don't do any animation.
if (immediate_) {
[window_ setFrame:window_frame display:YES];
return;
}
NSRect actual_window_frame = [window_ frame];
// Adjust status bubble origin if bubble was moved to the right.
// TODO(alekseys): fix for RTL.
if (NSMinX(actual_window_frame) > NSMinX(window_frame)) {
actual_window_frame.origin.x =
NSMaxX(actual_window_frame) - NSWidth(window_frame);
}
actual_window_frame.size.width = NSWidth(window_frame);
// Do not expand if it's going to cover mouse location.
if (NSPointInRect([NSEvent mouseLocation], actual_window_frame))
return;
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:kExpansionDuration];
[[window_ animator] setFrame:actual_window_frame display:YES];
[NSAnimationContext endGrouping];
}
void StatusBubbleMac::UpdateSizeAndPosition() {
if (!window_)
return;
[window_ setFrame:CalculateWindowFrame(/*expand=*/false) display:YES];
}
void StatusBubbleMac::SwitchParentWindow(NSWindow* parent) {
DCHECK(parent);
DCHECK(is_attached());
Detach();
parent_ = parent;
Attach();
UpdateSizeAndPosition();
}
NSRect StatusBubbleMac::CalculateWindowFrame(bool expanded_width) {
DCHECK(parent_);
NSRect screenRect;
if ([delegate_ respondsToSelector:@selector(statusBubbleBaseFrame)]) {
screenRect = [delegate_ statusBubbleBaseFrame];
screenRect.origin = [parent_ convertBaseToScreen:screenRect.origin];
} else {
screenRect = [parent_ frame];
}
NSSize size = NSMakeSize(0, kWindowHeight);
size = [[parent_ contentView] convertSize:size toView:nil];
if (expanded_width) {
size.width = screenRect.size.width;
} else {
size.width = kWindowWidthPercent * screenRect.size.width;
}
screenRect.size = size;
return screenRect;
}
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