forked from mirrors/gecko-dev
31b7df19ba
The context paint properties are used by the "New Container Tab" container icons. Differential Revision: https://phabricator.services.mozilla.com/D109823
89 lines
3.4 KiB
Text
89 lines
3.4 KiB
Text
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Creates icons for display in native menu items on macOS.
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*/
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#include "MOZIconHelper.h"
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#include "imgIContainer.h"
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#include "nsCocoaUtils.h"
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@implementation MOZIconHelper
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// Returns an autoreleased empty NSImage.
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+ (NSImage*)placeholderIconWithSize:(NSSize)aSize {
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return [[[NSImage alloc] initWithSize:aSize] autorelease];
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}
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// Returns an autoreleased NSImage.
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+ (NSImage*)iconImageFromImageContainer:(imgIContainer*)aImage
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withSize:(NSSize)aSize
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computedStyle:(const mozilla::ComputedStyle*)aComputedStyle
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subrect:(const nsIntRect&)aSubRect
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scaleFactor:(CGFloat)aScaleFactor {
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bool isEntirelyBlack = false;
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NSImage* retainedImage = nil;
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nsresult rv;
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if (aScaleFactor != 0.0f) {
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rv = nsCocoaUtils::CreateNSImageFromImageContainer(aImage, imgIContainer::FRAME_CURRENT,
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aComputedStyle, &retainedImage, aScaleFactor,
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&isEntirelyBlack);
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} else {
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rv = nsCocoaUtils::CreateDualRepresentationNSImageFromImageContainer(
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aImage, imgIContainer::FRAME_CURRENT, aComputedStyle, &retainedImage, &isEntirelyBlack);
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}
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NSImage* image = [retainedImage autorelease];
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if (NS_FAILED(rv) || !image) {
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return nil;
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}
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int32_t origWidth = 0, origHeight = 0;
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aImage->GetWidth(&origWidth);
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aImage->GetHeight(&origHeight);
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// If the image region is invalid, don't draw the image to almost match
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// the behavior of other platforms.
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if (!aSubRect.IsEmpty() && (aSubRect.XMost() > origWidth || aSubRect.YMost() > origHeight)) {
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return nil;
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}
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bool createSubImage =
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!aSubRect.IsEmpty() && !(aSubRect.x == 0 && aSubRect.y == 0 && aSubRect.width == origWidth &&
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aSubRect.height == origHeight);
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if (createSubImage) {
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// If aRect is set using CSS, we need to slice a piece out of the
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// overall image to use as the icon.
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NSRect subRect = NSMakeRect(aSubRect.x, aSubRect.y, aSubRect.width, aSubRect.height);
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NSImage* subImage = [NSImage imageWithSize:aSize
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flipped:NO
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drawingHandler:^BOOL(NSRect subImageRect) {
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[image drawInRect:NSMakeRect(0, 0, aSize.width, aSize.height)
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fromRect:subRect
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operation:NSCompositingOperationCopy
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fraction:1.0f];
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return YES;
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}];
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image = subImage;
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}
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// If all the color channels in the image are black, treat the image as a
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// template. This will cause macOS to use the image's alpha channel as a mask
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// and it will fill it with a color that looks good in the context that it's
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// used in. For example, for regular menu items, the image will be black, but
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// when the menu item is hovered (and its background is blue), it will be
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// filled with white.
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[image setTemplate:isEntirelyBlack];
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[image setSize:aSize];
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return image;
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}
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@end
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