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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "VibrancyManager.h"
#include "nsChildView.h"
#import <objc/message.h>
using namespace mozilla;
void
VibrancyManager::UpdateVibrantRegion(VibrancyType aType,
const LayoutDeviceIntRegion& aRegion)
{
if (aRegion.IsEmpty()) {
mVibrantRegions.Remove(uint32_t(aType));
return;
}
auto& vr = *mVibrantRegions.LookupOrAdd(uint32_t(aType));
vr.UpdateRegion(aRegion, mCoordinateConverter, mContainerView, ^() {
return this->CreateEffectView(aType);
});
}
@interface NSView(CurrentFillColor)
- (NSColor*)_currentFillColor;
@end
static NSColor*
AdjustedColor(NSColor* aFillColor, VibrancyType aType)
{
if (aType == VibrancyType::MENU && [aFillColor alphaComponent] == 1.0) {
// The opaque fill color that's used for the menu background when "Reduce
// vibrancy" is checked in the system accessibility prefs is too dark.
// This is probably because we're not using the right material for menus,
// see VibrancyManager::CreateEffectView.
return [NSColor colorWithDeviceWhite:0.96 alpha:1.0];
}
return aFillColor;
}
NSColor*
VibrancyManager::VibrancyFillColorForType(VibrancyType aType)
{
NSView* view = mVibrantRegions.LookupOrAdd(uint32_t(aType))->GetAnyView();
if (view && [view respondsToSelector:@selector(_currentFillColor)]) {
// -[NSVisualEffectView _currentFillColor] is the color that the view
// draws in its drawRect implementation.
return AdjustedColor([view _currentFillColor], aType);
}
return [NSColor whiteColor];
}
@interface NSView(FontSmoothingBackgroundColor)
- (NSColor*)fontSmoothingBackgroundColor;
@end
NSColor*
VibrancyManager::VibrancyFontSmoothingBackgroundColorForType(VibrancyType aType)
{
NSView* view = mVibrantRegions.LookupOrAdd(uint32_t(aType))->GetAnyView();
if (view && [view respondsToSelector:@selector(fontSmoothingBackgroundColor)]) {
return [view fontSmoothingBackgroundColor];
}
return [NSColor clearColor];
}
static NSView*
HitTestNil(id self, SEL _cmd, NSPoint aPoint)
{
// This view must be transparent to mouse events.
return nil;
}
static BOOL
AllowsVibrancyYes(id self, SEL _cmd)
{
// Means that the foreground is blended using a vibrant blend mode.
return YES;
}
static Class
CreateEffectViewClass(BOOL aForegroundVibrancy, BOOL aIsContainer)
{
// Create a class that inherits from NSVisualEffectView and overrides the
// methods -[NSView hitTest:] and -[NSVisualEffectView allowsVibrancy].
Class NSVisualEffectViewClass = NSClassFromString(@"NSVisualEffectView");
const char* className = aForegroundVibrancy
? "EffectViewWithForegroundVibrancy" : "EffectViewWithoutForegroundVibrancy";
Class EffectViewClass = objc_allocateClassPair(NSVisualEffectViewClass, className, 0);
if (!aIsContainer) {
class_addMethod(EffectViewClass, @selector(hitTest:), (IMP)HitTestNil,
"@@:{CGPoint=dd}");
}
if (aForegroundVibrancy) {
// Override the -[NSView allowsVibrancy] method to return YES.
class_addMethod(EffectViewClass, @selector(allowsVibrancy), (IMP)AllowsVibrancyYes, "I@:");
}
return EffectViewClass;
}
static id
AppearanceForVibrancyType(VibrancyType aType)
{
Class NSAppearanceClass = NSClassFromString(@"NSAppearance");
switch (aType) {
case VibrancyType::LIGHT:
case VibrancyType::TOOLTIP:
case VibrancyType::MENU:
case VibrancyType::HIGHLIGHTED_MENUITEM:
case VibrancyType::SHEET:
case VibrancyType::SOURCE_LIST:
case VibrancyType::SOURCE_LIST_SELECTION:
case VibrancyType::ACTIVE_SOURCE_LIST_SELECTION:
return [NSAppearanceClass performSelector:@selector(appearanceNamed:)
withObject:@"NSAppearanceNameVibrantLight"];
case VibrancyType::DARK:
return [NSAppearanceClass performSelector:@selector(appearanceNamed:)
withObject:@"NSAppearanceNameVibrantDark"];
}
}
#if !defined(MAC_OS_X_VERSION_10_10) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_10
enum {
NSVisualEffectStateFollowsWindowActiveState,
NSVisualEffectStateActive,
NSVisualEffectStateInactive
};
enum {
NSVisualEffectMaterialTitlebar = 3
};
#endif
#if !defined(MAC_OS_X_VERSION_10_11) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_11
enum {
NSVisualEffectMaterialMenu = 5,
NSVisualEffectMaterialSidebar = 7
};
#endif
static NSUInteger
VisualEffectStateForVibrancyType(VibrancyType aType)
{
switch (aType) {
case VibrancyType::TOOLTIP:
case VibrancyType::MENU:
case VibrancyType::HIGHLIGHTED_MENUITEM:
case VibrancyType::SHEET:
// Tooltip and menu windows are never "key" and sheets always looks
// active, so we need to tell the vibrancy effect to look active
// regardless of window state.
return NSVisualEffectStateActive;
default:
return NSVisualEffectStateFollowsWindowActiveState;
}
}
static BOOL
HasVibrantForeground(VibrancyType aType)
{
switch (aType) {
case VibrancyType::MENU:
return YES;
default:
return NO;
}
}
#if !defined(MAC_OS_X_VERSION_10_12) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_12
enum {
NSVisualEffectMaterialSelection = 4
};
#endif
@interface NSView(NSVisualEffectViewMethods)
- (void)setState:(NSUInteger)state;
- (void)setMaterial:(NSUInteger)material;
- (void)setEmphasized:(BOOL)emphasized;
@end
NSView*
VibrancyManager::CreateEffectView(VibrancyType aType, BOOL aIsContainer)
{
static Class EffectViewWithoutForegroundVibrancy = CreateEffectViewClass(NO, NO);
static Class EffectViewWithForegroundVibrancy = CreateEffectViewClass(YES, NO);
static Class EffectViewContainer = CreateEffectViewClass(NO, YES);
// Pick the right NSVisualEffectView subclass for the desired vibrancy mode.
// For "container" views, never use foreground vibrancy, because returning
// YES from allowsVibrancy forces on foreground vibrancy for all descendant
// views which can have unintended effects.
Class EffectViewClass = aIsContainer
? EffectViewContainer
: (HasVibrantForeground(aType) ? EffectViewWithForegroundVibrancy
: EffectViewWithoutForegroundVibrancy);
NSView* effectView = [[EffectViewClass alloc] initWithFrame:NSZeroRect];
[effectView performSelector:@selector(setAppearance:)
withObject:AppearanceForVibrancyType(aType)];
[effectView setState:VisualEffectStateForVibrancyType(aType)];
BOOL canUseElCapitanMaterials = nsCocoaFeatures::OnElCapitanOrLater();
if (aType == VibrancyType::MENU) {
// Before 10.11 there is no material that perfectly matches the menu
// look. Of all available material types, NSVisualEffectMaterialTitlebar
// is the one that comes closest.
[effectView setMaterial:canUseElCapitanMaterials ? NSVisualEffectMaterialMenu
: NSVisualEffectMaterialTitlebar];
} else if (aType == VibrancyType::SOURCE_LIST && canUseElCapitanMaterials) {
[effectView setMaterial:NSVisualEffectMaterialSidebar];
} else if (aType == VibrancyType::HIGHLIGHTED_MENUITEM ||
aType == VibrancyType::SOURCE_LIST_SELECTION ||
aType == VibrancyType::ACTIVE_SOURCE_LIST_SELECTION) {
[effectView setMaterial:NSVisualEffectMaterialSelection];
if ([effectView respondsToSelector:@selector(setEmphasized:)] &&
aType != VibrancyType::SOURCE_LIST_SELECTION) {
[effectView setEmphasized:YES];
}
}
return effectView;
}
static bool
ComputeSystemSupportsVibrancy()
{
#ifdef __x86_64__
return NSClassFromString(@"NSAppearance") &&
NSClassFromString(@"NSVisualEffectView");
#else
// objc_allocateClassPair doesn't work in 32 bit mode, so turn off vibrancy.
return false;
#endif
}
/* static */ bool
VibrancyManager::SystemSupportsVibrancy()
{
static bool supportsVibrancy = ComputeSystemSupportsVibrancy();
return supportsVibrancy;
}
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