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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 "mozilla/dom/Document.h"
#include "nsCocoaUtils.h"
#include "nsComputedDOMStyle.h"
#include "nsContentUtils.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsIContentPolicy.h"
#include "nsMenuItemX.h"
#include "nsMenuItemIconX.h"
#include "nsNameSpaceManager.h"
#include "nsObjCExceptions.h"
using namespace mozilla;
using mozilla::dom::Element;
using mozilla::widget::IconLoader;
using mozilla::widget::IconLoaderHelperCocoa;
static const uint32_t kIconSize = 16;
nsMenuItemIconX::nsMenuItemIconX(nsMenuObjectX* aMenuItem, nsIContent* aContent,
NSMenuItem* aNativeMenuItem)
: mContent(aContent),
mContentType(nsIContentPolicy::TYPE_INTERNAL_IMAGE),
mMenuObject(aMenuItem),
mSetIcon(false),
mNativeMenuItem(aNativeMenuItem) {
MOZ_COUNT_CTOR(nsMenuItemIconX);
}
nsMenuItemIconX::~nsMenuItemIconX() {
Destroy();
MOZ_COUNT_DTOR(nsMenuItemIconX);
}
// Called from mMenuObjectX's destructor, to prevent us from outliving it
// (as might otherwise happen if calls to our imgINotificationObserver methods
// are still outstanding). mMenuObjectX owns our mNativeMenuItem.
void nsMenuItemIconX::Destroy() {
if (mIconLoader) {
mIconLoader = nullptr;
}
if (mIconLoaderHelper) {
mIconLoaderHelper = nullptr;
}
mMenuObject = nullptr;
mNativeMenuItem = nil;
}
nsresult nsMenuItemIconX::SetupIcon() {
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
// Still don't have one, then something is wrong, get out of here.
if (!mNativeMenuItem) {
NS_ERROR("No native menu item");
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIURI> iconURI;
nsresult rv = GetIconURI(getter_AddRefs(iconURI));
if (NS_FAILED(rv)) {
// There is no icon for this menu item. An icon might have been set
// earlier. Clear it.
[mNativeMenuItem setImage:nil];
return NS_OK;
}
if (!mIconLoader) {
mIconLoaderHelper = new IconLoaderHelperCocoa(this, kIconSize, kIconSize);
mIconLoader = new IconLoader(mIconLoaderHelper, mContent, mImageRegionRect);
if (!mIconLoader) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
if (!mSetIcon) {
// Load placeholder icon.
[mNativeMenuItem setImage:mIconLoaderHelper->GetNativeIconImage()];
}
rv = mIconLoader->LoadIcon(iconURI);
if (NS_FAILED(rv)) {
// There is no icon for this menu item, as an error occurred while loading it.
// An icon might have been set earlier or the place holder icon may have
// been set. Clear it.
[mNativeMenuItem setImage:nil];
}
mSetIcon = true;
return rv;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
nsresult nsMenuItemIconX::GetIconURI(nsIURI** aIconURI) {
if (!mMenuObject) return NS_ERROR_FAILURE;
// Mac native menu items support having both a checkmark and an icon
// simultaneously, but this is unheard of in the cross-platform toolkit,
// seemingly because the win32 theme is unable to cope with both at once.
// The downside is that it's possible to get a menu item marked with a
// native checkmark and a checkmark for an icon. Head off that possibility
// by pretending that no icon exists if this is a checkable menu item.
if (mMenuObject->MenuObjectType() == eMenuItemObjectType) {
nsMenuItemX* menuItem = static_cast<nsMenuItemX*>(mMenuObject);
if (menuItem->GetMenuItemType() != eRegularMenuItemType) return NS_ERROR_FAILURE;
}
if (!mContent) return NS_ERROR_FAILURE;
// First, look at the content node's "image" attribute.
nsAutoString imageURIString;
bool hasImageAttr =
mContent->IsElement() &&
mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::image, imageURIString);
nsresult rv;
RefPtr<ComputedStyle> sc;
nsCOMPtr<nsIURI> iconURI;
if (!hasImageAttr) {
// If the content node has no "image" attribute, get the
// "list-style-image" property from CSS.
RefPtr<mozilla::dom::Document> document = mContent->GetComposedDoc();
if (!document || !mContent->IsElement()) {
return NS_ERROR_FAILURE;
}
sc = nsComputedDOMStyle::GetComputedStyle(mContent->AsElement(), nullptr);
if (!sc) {
return NS_ERROR_FAILURE;
}
iconURI = sc->StyleList()->GetListStyleImageURI();
if (!iconURI) {
return NS_ERROR_FAILURE;
}
} else {
uint64_t dummy = 0;
nsCOMPtr<nsIPrincipal> triggeringPrincipal = mContent->NodePrincipal();
nsContentUtils::GetContentPolicyTypeForUIImageLoading(
mContent, getter_AddRefs(triggeringPrincipal), mContentType, &dummy);
// If this menu item shouldn't have an icon, the string will be empty,
// and NS_NewURI will fail.
rv = NS_NewURI(getter_AddRefs(iconURI), imageURIString);
if (NS_FAILED(rv)) return rv;
}
// Empty the mImageRegionRect initially as the image region CSS could
// have been changed and now have an error or have been removed since the
// last GetIconURI call.
mImageRegionRect.SetEmpty();
iconURI.forget(aIconURI);
if (!hasImageAttr) {
// Check if the icon has a specified image region so that it can be
// cropped appropriately before being displayed.
const nsRect r = sc->StyleList()->GetImageRegion();
// Return NS_ERROR_FAILURE if the image region is invalid so the image
// is not drawn, and behavior is similar to XUL menus.
if (r.X() < 0 || r.Y() < 0 || r.Width() < 0 || r.Height() < 0) {
return NS_ERROR_FAILURE;
}
// 'auto' is represented by a [0, 0, 0, 0] rect. Only set mImageRegionRect
// if we have some other value.
if (!r.IsEmpty()) {
mImageRegionRect = r.ToNearestPixels(mozilla::AppUnitsPerCSSPixel());
}
}
return NS_OK;
}
//
// mozilla::widget::IconLoaderListenerCocoa
//
nsresult nsMenuItemIconX::OnComplete() {
if (!mIconLoaderHelper) {
return NS_ERROR_FAILURE;
}
NSImage* image = mIconLoaderHelper->GetNativeIconImage();
if (!mNativeMenuItem) {
mIconLoaderHelper->Destroy();
return NS_ERROR_FAILURE;
}
if (!image) {
[mNativeMenuItem setImage:nil];
return NS_OK;
}
[mNativeMenuItem setImage:image];
if (mMenuObject) {
mMenuObject->IconUpdated();
}
mIconLoaderHelper->Destroy();
return NS_OK;
}
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