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/* -*- Mode: C++; tab-width: 2; 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/. */
/*
* Creates icons for display in native menu items on macOS.
*/
#include "MOZIconHelper.h"
#include "imgIContainer.h"
#include "nsCocoaUtils.h"
@implementation MOZIconHelper
// Returns an autoreleased empty NSImage.
+ (NSImage*)placeholderIconWithSize:(NSSize)aSize {
return [[[NSImage alloc] initWithSize:aSize] autorelease];
}
// Returns an autoreleased NSImage.
+ (NSImage*)iconImageFromImageContainer:(imgIContainer*)aImage
withSize:(NSSize)aSize
presContext:(const nsPresContext*)aPresContext
computedStyle:
(const mozilla::ComputedStyle*)aComputedStyle
scaleFactor:(CGFloat)aScaleFactor {
bool isEntirelyBlack = false;
NSImage* retainedImage = nil;
nsresult rv;
if (aScaleFactor != 0.0f) {
rv = nsCocoaUtils::CreateNSImageFromImageContainer(
aImage, imgIContainer::FRAME_CURRENT, aPresContext, aComputedStyle,
aSize, &retainedImage, aScaleFactor, &isEntirelyBlack);
} else {
rv = nsCocoaUtils::CreateDualRepresentationNSImageFromImageContainer(
aImage, imgIContainer::FRAME_CURRENT, aPresContext, aComputedStyle,
aSize, &retainedImage, &isEntirelyBlack);
}
NSImage* image = [retainedImage autorelease];
if (NS_FAILED(rv) || !image) {
return nil;
}
// If all the color channels in the image are black, treat the image as a
// template. This will cause macOS to use the image's alpha channel as a mask
// and it will fill it with a color that looks good in the context that it's
// used in. For example, for regular menu items, the image will be black, but
// when the menu item is hovered (and its background is blue), it will be
// filled with white.
[image setTemplate:isEntirelyBlack];
[image setSize:aSize];
return image;
}
@end
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