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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/. */
/*
* Retrieves and displays icons in native menu items on Mac OS X.
*/
/* exception_defines.h defines 'try' to 'if (true)' which breaks objective-c
exceptions and produces errors like: error: unexpected '@' in program'.
If we define __EXCEPTIONS exception_defines.h will avoid doing this.
See bug 666609 for more information.
We use <limits> to get the libstdc++ version. */
#include <limits>
#if __GLIBCXX__ <= 20070719
# ifndef __EXCEPTIONS
# define __EXCEPTIONS
# endif
#endif
#include "gfxPlatform.h"
#include "imgIContainer.h"
#include "imgLoader.h"
#include "imgRequestProxy.h"
#include "mozilla/dom/Document.h"
#include "nsCocoaUtils.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
#include "nsNameSpaceManager.h"
#include "nsNetUtil.h"
#include "nsObjCExceptions.h"
#include "nsThreadUtils.h"
#include "nsToolkit.h"
#include "IconLoaderHelperCocoa.h"
using namespace mozilla;
using mozilla::gfx::SourceSurface;
using mozilla::widget::IconLoaderListenerCocoa;
namespace mozilla::widget {
NS_IMPL_ISUPPORTS0(IconLoaderHelperCocoa)
IconLoaderHelperCocoa::IconLoaderHelperCocoa(IconLoaderListenerCocoa* aListener,
uint32_t aIconHeight, uint32_t aIconWidth,
CGFloat aScaleFactor)
: mLoadListener(aListener),
mIconHeight(aIconHeight),
mIconWidth(aIconWidth),
mScaleFactor(aScaleFactor) {
// Placeholder icon, which will later be replaced.
mNativeIconImage = [[NSImage alloc] initWithSize:NSMakeSize(mIconHeight, mIconWidth)];
MOZ_ASSERT(aListener);
}
IconLoaderHelperCocoa::~IconLoaderHelperCocoa() { Destroy(); }
nsresult IconLoaderHelperCocoa::OnComplete(imgIContainer* aImage, const nsIntRect& aRect) {
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
NS_ENSURE_ARG_POINTER(aImage);
bool isEntirelyBlack = false;
NSImage* newImage = nil;
nsresult rv;
if (mScaleFactor != 0.0f) {
rv = nsCocoaUtils::CreateNSImageFromImageContainer(aImage, imgIContainer::FRAME_CURRENT,
&newImage, mScaleFactor, &isEntirelyBlack);
} else {
rv = nsCocoaUtils::CreateDualRepresentationNSImageFromImageContainer(
aImage, imgIContainer::FRAME_CURRENT, &newImage, &isEntirelyBlack);
}
if (NS_FAILED(rv) || !newImage) {
mNativeIconImage = nil;
[newImage release];
return NS_ERROR_FAILURE;
}
NSSize requestedSize = NSMakeSize(mIconWidth, mIconHeight);
int32_t origWidth = 0, origHeight = 0;
aImage->GetWidth(&origWidth);
aImage->GetHeight(&origHeight);
bool createSubImage =
!(aRect.x == 0 && aRect.y == 0 && aRect.width == origWidth && aRect.height == origHeight);
if (createSubImage) {
// If aRect is set using CSS, we need to slice a piece out of the
// overall image to use as the icon.
NSImage* subImage =
[NSImage imageWithSize:requestedSize
flipped:NO
drawingHandler:^BOOL(NSRect subImageRect) {
[newImage drawInRect:NSMakeRect(0, 0, mIconWidth, mIconHeight)
fromRect:NSMakeRect(aRect.x, aRect.y, aRect.width, aRect.height)
operation:NSCompositingOperationCopy
fraction:1.0f];
return YES;
}];
[newImage release];
newImage = [subImage retain];
subImage = 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.
[newImage setTemplate:isEntirelyBlack];
[newImage setSize:requestedSize];
NSImage* placeholderImage = mNativeIconImage;
mNativeIconImage = newImage;
[placeholderImage release];
placeholderImage = nil;
mLoadListener->OnComplete();
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
}
NSImage* IconLoaderHelperCocoa::GetNativeIconImage() { return mNativeIconImage; }
void IconLoaderHelperCocoa::Destroy() {
if (mNativeIconImage) {
[mNativeIconImage release];
mNativeIconImage = nil;
}
}
} // namespace mozilla::widget
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