зеркало из https://github.com/mozilla/gecko-dev.git
475 строки
15 KiB
Plaintext
475 строки
15 KiB
Plaintext
/* -*- 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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* Retrieves and displays icons in native menu items on Mac OS X.
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*/
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/* exception_defines.h defines 'try' to 'if (true)' which breaks objective-c
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exceptions and produces errors like: error: unexpected '@' in program'.
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If we define __EXCEPTIONS exception_defines.h will avoid doing this.
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See bug 666609 for more information.
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We use <limits> to get the libstdc++ version. */
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#include <limits>
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#if __GLIBCXX__ <= 20070719
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#define __EXCEPTIONS
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#endif
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#include "nsMenuItemIconX.h"
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#include "nsObjCExceptions.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsINameSpaceManager.h"
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#include "nsGkAtoms.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMCSSStyleDeclaration.h"
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#include "nsIDOMCSSValue.h"
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#include "nsIDOMCSSPrimitiveValue.h"
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#include "nsIDOMRect.h"
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#include "nsThreadUtils.h"
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#include "nsToolkit.h"
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#include "nsNetUtil.h"
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#include "imgLoader.h"
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#include "imgRequestProxy.h"
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#include "nsMenuItemX.h"
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#include "gfxImageSurface.h"
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#include "imgIContainer.h"
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#include "nsCocoaUtils.h"
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#include "nsContentUtils.h"
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static const uint32_t kIconWidth = 16;
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static const uint32_t kIconHeight = 16;
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static const uint32_t kIconBitsPerComponent = 8;
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static const uint32_t kIconComponents = 4;
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static const uint32_t kIconBitsPerPixel = kIconBitsPerComponent *
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kIconComponents;
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static const uint32_t kIconBytesPerRow = kIconWidth * kIconBitsPerPixel / 8;
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static const uint32_t kIconBytes = kIconBytesPerRow * kIconHeight;
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typedef NS_STDCALL_FUNCPROTO(nsresult, GetRectSideMethod, nsIDOMRect,
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GetBottom, (nsIDOMCSSPrimitiveValue**));
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NS_IMPL_ISUPPORTS1(nsMenuItemIconX, imgINotificationObserver)
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nsMenuItemIconX::nsMenuItemIconX(nsMenuObjectX* aMenuItem,
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nsIContent* aContent,
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NSMenuItem* aNativeMenuItem)
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: mContent(aContent)
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, mMenuObject(aMenuItem)
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, mLoadedIcon(false)
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, mSetIcon(false)
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, mNativeMenuItem(aNativeMenuItem)
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{
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// printf("Creating icon for menu item %d, menu %d, native item is %d\n", aMenuItem, aMenu, aNativeMenuItem);
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}
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nsMenuItemIconX::~nsMenuItemIconX()
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{
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if (mIconRequest)
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mIconRequest->CancelAndForgetObserver(NS_BINDING_ABORTED);
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}
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// Called from mMenuObjectX's destructor, to prevent us from outliving it
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// (as might otherwise happen if calls to our imgINotificationObserver methods
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// are still outstanding). mMenuObjectX owns our nNativeMenuItem.
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void nsMenuItemIconX::Destroy()
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{
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if (mIconRequest) {
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mIconRequest->CancelAndForgetObserver(NS_BINDING_ABORTED);
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mIconRequest = nullptr;
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}
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mMenuObject = nullptr;
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mNativeMenuItem = nil;
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}
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nsresult
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nsMenuItemIconX::SetupIcon()
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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// Still don't have one, then something is wrong, get out of here.
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if (!mNativeMenuItem) {
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NS_ERROR("No native menu item");
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsIURI> iconURI;
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nsresult rv = GetIconURI(getter_AddRefs(iconURI));
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if (NS_FAILED(rv)) {
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// There is no icon for this menu item. An icon might have been set
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// earlier. Clear it.
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[mNativeMenuItem setImage:nil];
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return NS_OK;
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}
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rv = LoadIcon(iconURI);
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if (NS_FAILED(rv)) {
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// There is no icon for this menu item, as an error occurred while loading it.
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// An icon might have been set earlier or the place holder icon may have
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// been set. Clear it.
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[mNativeMenuItem setImage:nil];
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}
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return rv;
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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static int32_t
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GetDOMRectSide(nsIDOMRect* aRect, GetRectSideMethod aMethod)
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{
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nsCOMPtr<nsIDOMCSSPrimitiveValue> dimensionValue;
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(aRect->*aMethod)(getter_AddRefs(dimensionValue));
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if (!dimensionValue)
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return -1;
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uint16_t primitiveType;
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nsresult rv = dimensionValue->GetPrimitiveType(&primitiveType);
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if (NS_FAILED(rv) || primitiveType != nsIDOMCSSPrimitiveValue::CSS_PX)
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return -1;
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float dimension = 0;
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rv = dimensionValue->GetFloatValue(nsIDOMCSSPrimitiveValue::CSS_PX,
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&dimension);
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if (NS_FAILED(rv))
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return -1;
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return NSToIntRound(dimension);
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}
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nsresult
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nsMenuItemIconX::GetIconURI(nsIURI** aIconURI)
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{
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if (!mMenuObject)
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return NS_ERROR_FAILURE;
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// Mac native menu items support having both a checkmark and an icon
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// simultaneously, but this is unheard of in the cross-platform toolkit,
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// seemingly because the win32 theme is unable to cope with both at once.
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// The downside is that it's possible to get a menu item marked with a
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// native checkmark and a checkmark for an icon. Head off that possibility
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// by pretending that no icon exists if this is a checkable menu item.
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if (mMenuObject->MenuObjectType() == eMenuItemObjectType) {
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nsMenuItemX* menuItem = static_cast<nsMenuItemX*>(mMenuObject);
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if (menuItem->GetMenuItemType() != eRegularMenuItemType)
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return NS_ERROR_FAILURE;
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}
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if (!mContent)
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return NS_ERROR_FAILURE;
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// First, look at the content node's "image" attribute.
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nsAutoString imageURIString;
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bool hasImageAttr = mContent->GetAttr(kNameSpaceID_None,
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nsGkAtoms::image,
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imageURIString);
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nsresult rv;
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nsCOMPtr<nsIDOMCSSValue> cssValue;
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nsCOMPtr<nsIDOMCSSStyleDeclaration> cssStyleDecl;
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nsCOMPtr<nsIDOMCSSPrimitiveValue> primitiveValue;
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uint16_t primitiveType;
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if (!hasImageAttr) {
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// If the content node has no "image" attribute, get the
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// "list-style-image" property from CSS.
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nsCOMPtr<nsIDocument> document = mContent->GetDocument();
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if (!document)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsPIDOMWindow> window = document->GetWindow();
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if (!window)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIDOMElement> domElement = do_QueryInterface(mContent);
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if (!domElement)
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return NS_ERROR_FAILURE;
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rv = window->GetComputedStyle(domElement, EmptyString(),
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getter_AddRefs(cssStyleDecl));
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if (NS_FAILED(rv))
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return rv;
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NS_NAMED_LITERAL_STRING(listStyleImage, "list-style-image");
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rv = cssStyleDecl->GetPropertyCSSValue(listStyleImage,
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getter_AddRefs(cssValue));
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if (NS_FAILED(rv)) return rv;
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primitiveValue = do_QueryInterface(cssValue);
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if (!primitiveValue) return NS_ERROR_FAILURE;
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rv = primitiveValue->GetPrimitiveType(&primitiveType);
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if (NS_FAILED(rv)) return rv;
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if (primitiveType != nsIDOMCSSPrimitiveValue::CSS_URI)
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return NS_ERROR_FAILURE;
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rv = primitiveValue->GetStringValue(imageURIString);
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if (NS_FAILED(rv)) return rv;
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}
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// Empty the mImageRegionRect initially as the image region CSS could
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// have been changed and now have an error or have been removed since the
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// last GetIconURI call.
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mImageRegionRect.SetEmpty();
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// If this menu item shouldn't have an icon, the string will be empty,
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// and NS_NewURI will fail.
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nsCOMPtr<nsIURI> iconURI;
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rv = NS_NewURI(getter_AddRefs(iconURI), imageURIString);
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if (NS_FAILED(rv)) return rv;
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*aIconURI = iconURI;
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NS_ADDREF(*aIconURI);
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if (!hasImageAttr) {
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// Check if the icon has a specified image region so that it can be
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// cropped appropriately before being displayed.
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NS_NAMED_LITERAL_STRING(imageRegion, "-moz-image-region");
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rv = cssStyleDecl->GetPropertyCSSValue(imageRegion,
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getter_AddRefs(cssValue));
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// Just return NS_OK if there if there is a failure due to no
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// moz-image region specified so the whole icon will be drawn anyway.
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if (NS_FAILED(rv)) return NS_OK;
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primitiveValue = do_QueryInterface(cssValue);
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if (!primitiveValue) return NS_OK;
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rv = primitiveValue->GetPrimitiveType(&primitiveType);
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if (NS_FAILED(rv)) return NS_OK;
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if (primitiveType != nsIDOMCSSPrimitiveValue::CSS_RECT)
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return NS_OK;
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nsCOMPtr<nsIDOMRect> imageRegionRect;
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rv = primitiveValue->GetRectValue(getter_AddRefs(imageRegionRect));
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if (NS_FAILED(rv)) return NS_OK;
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if (imageRegionRect) {
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// Return NS_ERROR_FAILURE if the image region is invalid so the image
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// is not drawn, and behavior is similar to XUL menus.
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int32_t bottom = GetDOMRectSide(imageRegionRect, &nsIDOMRect::GetBottom);
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int32_t right = GetDOMRectSide(imageRegionRect, &nsIDOMRect::GetRight);
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int32_t top = GetDOMRectSide(imageRegionRect, &nsIDOMRect::GetTop);
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int32_t left = GetDOMRectSide(imageRegionRect, &nsIDOMRect::GetLeft);
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if (top < 0 || left < 0 || bottom <= top || right <= left)
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return NS_ERROR_FAILURE;
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mImageRegionRect.SetRect(left, top, right - left, bottom - top);
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}
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}
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return NS_OK;
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}
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nsresult
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nsMenuItemIconX::LoadIcon(nsIURI* aIconURI)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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if (mIconRequest) {
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// Another icon request is already in flight. Kill it.
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mIconRequest->Cancel(NS_BINDING_ABORTED);
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mIconRequest = nullptr;
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}
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mLoadedIcon = false;
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if (!mContent) return NS_ERROR_FAILURE;
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nsCOMPtr<nsIDocument> document = mContent->OwnerDoc();
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nsCOMPtr<nsILoadGroup> loadGroup = document->GetDocumentLoadGroup();
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if (!loadGroup) return NS_ERROR_FAILURE;
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nsRefPtr<imgLoader> loader = nsContentUtils::GetImgLoaderForDocument(document);
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if (!loader) return NS_ERROR_FAILURE;
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if (!mSetIcon) {
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// Set a completely transparent 16x16 image as the icon on this menu item
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// as a placeholder. This keeps the menu item text displayed in the same
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// position that it will be displayed when the real icon is loaded, and
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// prevents it from jumping around or looking misaligned.
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static bool sInitializedPlaceholder;
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static NSImage* sPlaceholderIconImage;
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if (!sInitializedPlaceholder) {
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sInitializedPlaceholder = true;
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// Note that we only create the one and reuse it forever, so this is not a leak.
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sPlaceholderIconImage = [[NSImage alloc] initWithSize:NSMakeSize(kIconWidth, kIconHeight)];
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}
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if (!sPlaceholderIconImage) return NS_ERROR_FAILURE;
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if (mNativeMenuItem)
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[mNativeMenuItem setImage:sPlaceholderIconImage];
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}
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// Passing in null for channelPolicy here since nsMenuItemIconX::LoadIcon is
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// not exposed to web content
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nsresult rv = loader->LoadImage(aIconURI, nullptr, nullptr, nullptr, loadGroup, this,
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nullptr, nsIRequest::LOAD_NORMAL, nullptr,
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nullptr, getter_AddRefs(mIconRequest));
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if (NS_FAILED(rv)) return rv;
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// We need to request the icon be decoded (bug 573583, bug 705516).
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mIconRequest->StartDecoding();
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return NS_OK;
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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//
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// imgINotificationObserver
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//
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NS_IMETHODIMP
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nsMenuItemIconX::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
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{
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if (aType == imgINotificationObserver::FRAME_COMPLETE) {
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return OnStopFrame(aRequest);
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}
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if (aType == imgINotificationObserver::DECODE_COMPLETE) {
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if (mIconRequest && mIconRequest == aRequest) {
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mIconRequest->Cancel(NS_BINDING_ABORTED);
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mIconRequest = nullptr;
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}
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}
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return NS_OK;
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}
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nsresult
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nsMenuItemIconX::OnStopFrame(imgIRequest* aRequest)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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if (aRequest != mIconRequest)
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return NS_ERROR_FAILURE;
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// Only support one frame.
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if (mLoadedIcon)
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return NS_OK;
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if (!mNativeMenuItem)
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return NS_ERROR_FAILURE;
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nsCOMPtr<imgIContainer> imageContainer;
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aRequest->GetImage(getter_AddRefs(imageContainer));
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if (!imageContainer) {
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[mNativeMenuItem setImage:nil];
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return NS_ERROR_FAILURE;
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}
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int32_t origWidth = 0, origHeight = 0;
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imageContainer->GetWidth(&origWidth);
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imageContainer->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 (!mImageRegionRect.IsEmpty() &&
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(mImageRegionRect.XMost() > origWidth ||
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mImageRegionRect.YMost() > origHeight)) {
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[mNativeMenuItem setImage:nil];
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return NS_ERROR_FAILURE;
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}
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if (mImageRegionRect.IsEmpty()) {
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mImageRegionRect.SetRect(0, 0, origWidth, origHeight);
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}
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nsRefPtr<gfxASurface> surface;
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imageContainer->GetFrame(imgIContainer::FRAME_CURRENT,
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imgIContainer::FLAG_NONE,
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getter_AddRefs(surface));
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if (!surface) {
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[mNativeMenuItem setImage:nil];
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return NS_ERROR_FAILURE;
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}
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nsRefPtr<gfxImageSurface> frame(surface->GetAsReadableARGB32ImageSurface());
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NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
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CGImageRef origImage = NULL;
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nsresult rv = nsCocoaUtils::CreateCGImageFromSurface(frame, &origImage);
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if (NS_FAILED(rv) || !origImage) {
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[mNativeMenuItem setImage:nil];
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return NS_ERROR_FAILURE;
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}
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bool createSubImage = !(mImageRegionRect.x == 0 && mImageRegionRect.y == 0 &&
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mImageRegionRect.width == origWidth && mImageRegionRect.height == origHeight);
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CGImageRef finalImage = NULL;
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if (createSubImage) {
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// if mImageRegionRect is set using CSS, we need to slice a piece out of the overall
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// image to use as the icon
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finalImage = ::CGImageCreateWithImageInRect(origImage,
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::CGRectMake(mImageRegionRect.x,
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mImageRegionRect.y,
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mImageRegionRect.width,
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mImageRegionRect.height));
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::CGImageRelease(origImage);
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if (!finalImage) {
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[mNativeMenuItem setImage:nil];
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return NS_ERROR_FAILURE;
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}
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} else {
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finalImage = origImage;
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}
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// The image may not be the right size for a menu icon (16x16).
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// Create a new CGImage for the menu item.
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uint8_t* bitmap = (uint8_t*)malloc(kIconBytes);
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CGColorSpaceRef colorSpace = ::CGColorSpaceCreateDeviceRGB();
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CGContextRef bitmapContext = ::CGBitmapContextCreate(bitmap, kIconWidth, kIconHeight,
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kIconBitsPerComponent,
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kIconBytesPerRow,
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colorSpace,
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kCGImageAlphaPremultipliedLast);
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::CGColorSpaceRelease(colorSpace);
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if (!bitmapContext) {
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::CGImageRelease(finalImage);
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free(bitmap);
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::CGColorSpaceRelease(colorSpace);
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return NS_ERROR_FAILURE;
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}
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CGRect iconRect = ::CGRectMake(0, 0, kIconWidth, kIconHeight);
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::CGContextClearRect(bitmapContext, iconRect);
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::CGContextDrawImage(bitmapContext, iconRect, finalImage);
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CGImageRef iconImage = ::CGBitmapContextCreateImage(bitmapContext);
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::CGImageRelease(finalImage);
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::CGContextRelease(bitmapContext);
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free(bitmap);
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if (!iconImage) return NS_ERROR_FAILURE;
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NSImage *newImage = nil;
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rv = nsCocoaUtils::CreateNSImageFromCGImage(iconImage, &newImage);
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if (NS_FAILED(rv) || !newImage) {
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[mNativeMenuItem setImage:nil];
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::CGImageRelease(iconImage);
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return NS_ERROR_FAILURE;
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}
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[mNativeMenuItem setImage:newImage];
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[newImage release];
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::CGImageRelease(iconImage);
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mLoadedIcon = true;
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mSetIcon = true;
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return NS_OK;
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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