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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 "MOZIconHelper.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.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;
static const uint32_t kIconSize = 16;
nsMenuItemIconX::nsMenuItemIconX(Listener* aListener) : mListener(aListener) {
MOZ_COUNT_CTOR(nsMenuItemIconX);
}
nsMenuItemIconX::~nsMenuItemIconX() {
if (mIconLoader) {
mIconLoader->Destroy();
}
if (mIconImage) {
[mIconImage release];
mIconImage = nil;
}
MOZ_COUNT_DTOR(nsMenuItemIconX);
}
void nsMenuItemIconX::SetupIcon(nsIContent* aContent) {
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
bool shouldHaveIcon = StartIconLoad(aContent);
if (!shouldHaveIcon) {
// 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.
if (mIconImage) {
[mIconImage release];
mIconImage = nil;
}
return;
}
if (!mIconImage) {
// Set a placeholder icon, so that the menuitem reserves space for the icon during the load and
// there is no sudden shift once the icon finishes loading.
NSSize iconSize = NSMakeSize(kIconSize, kIconSize);
mIconImage = [[MOZIconHelper placeholderIconWithSize:iconSize] retain];
}
NS_OBJC_END_TRY_ABORT_BLOCK;
}
bool nsMenuItemIconX::StartIconLoad(nsIContent* aContent) {
RefPtr<nsIURI> iconURI = GetIconURI(aContent);
if (!iconURI) {
return false;
}
if (!mIconLoader) {
mIconLoader = new IconLoader(this);
}
nsresult rv = mIconLoader->LoadIcon(iconURI, aContent);
return NS_SUCCEEDED(rv);
}
already_AddRefed<nsIURI> nsMenuItemIconX::GetIconURI(nsIContent* aContent) {
// First, look at the content node's "image" attribute.
nsAutoString imageURIString;
bool hasImageAttr =
aContent->IsElement() &&
aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::image, imageURIString);
if (hasImageAttr) {
// Use the URL from the image attribute.
// If this menu item shouldn't have an icon, the string will be empty,
// and NS_NewURI will fail.
RefPtr<nsIURI> iconURI;
nsresult rv = NS_NewURI(getter_AddRefs(iconURI), imageURIString);
if (NS_FAILED(rv)) {
return nullptr;
}
return iconURI.forget();
}
// If the content node has no "image" attribute, get the
// "list-style-image" property from CSS.
RefPtr<mozilla::dom::Document> document = aContent->GetComposedDoc();
if (!document || !aContent->IsElement()) {
return nullptr;
}
RefPtr<const ComputedStyle> sc = nsComputedDOMStyle::GetComputedStyle(aContent->AsElement());
if (!sc) {
return nullptr;
}
RefPtr<nsIURI> iconURI = sc->StyleList()->GetListStyleImageURI();
if (!iconURI) {
return nullptr;
}
mComputedStyle = std::move(sc);
mPresContext = document->GetPresContext();
return iconURI.forget();
}
//
// mozilla::widget::IconLoader::Listener
//
nsresult nsMenuItemIconX::OnComplete(imgIContainer* aImage) {
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
if (mIconImage) {
[mIconImage release];
mIconImage = nil;
}
RefPtr<nsPresContext> pc = mPresContext.get();
mIconImage = [[MOZIconHelper iconImageFromImageContainer:aImage
withSize:NSMakeSize(kIconSize, kIconSize)
presContext:pc
computedStyle:mComputedStyle
scaleFactor:0.0f] retain];
mComputedStyle = nullptr;
mPresContext = nullptr;
if (mListener) {
mListener->IconUpdated();
}
mIconLoader->Destroy();
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK;
}
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