处理“打开的文档".雪豹(odoc)事件 [英] Handling "Open Document" (odoc) events in Snow Leopard
问题描述
我的应用程序中有代码可以响应打开文档"(odoc)事件.在Mac OS X Tiger和Leopard中，此代码可以正常工作:
-(无效)handleOpenDocumentEvent:(NSAppleEventDescriptor *)事件withReplyEvent:(NSAppleEventDescriptor *)replyEvent{NSAppleEventDescriptor const * const dirObj =[event descriptorForKeyword:keyDirectObject];DescType const dirObjType = [dirObj descriptorType];如果(dirObjType =='alis'){////打开一个文件.//NSData const * const data = [dirObj data];AliasHandle const fileHandle =reinterpret_cast< AliasHandle>(:: NewHandle([数据长度]));如果(fileHandle){[data getBytes:* fileHandle];err = [self queueFile:fileHandle fromSender:senderSig];}} else if(dirObjType =='list'){////打开多个文件.//AliasHandle fileHandle =reinterpret_cast< AliasHandle>(:: NewHandle(0));如果(fileHandle){int const numItems = [dirObj numberOfItems];for(int i = 1; i< = numItems; ++ i){NSData const * const data = [[dirObj descriptorAtIndex:i]数据];:: SetHandleSize(reinterpret_cast< Handle>(fileHandle)，[数据长度]);如果((err = :: MemError())！= noErr)休息;[data getBytes:* fileHandle];err = [self queueFile:fileHandle fromSender:senderSig];如果(err！= noErr)休息;}}}} 在Mac OS X Snow Leopard下，此代码不起作用.这是Leopard系统中的AppleEvent转储:
{1}'aevt':aevt/odoc(i386){返回ID:1012269061(0x3c560005)交易编号:0(0x0)互动度:112(0x70)需要回复:0(0x0)远程:0(0x0)用于记录:0(0x0)回复端口:150031(0x24a0f)目标:{1}'psn':8个字节{{0x0，0x655655}(iPhoto)}fEventSourcePSN:{0x0,0x655655}(iPhoto)可选属性:<空记录>事件数据:{1}'aevt':-1个项目{钥匙 ' - - ' -{1}'列表':-1个元素{{1}'alis':326个字节{/Users/pjl/Pictures/IMG_8501.JPG}}}} 这是Snow Leopard系统中的AppleEvent转储:
{1}'aevt':aevt/odoc(i386){返回ID:5173(0x1435)交易编号:0(0x0)互动度:112(0x70)需要回复:0(0x0)远程:0(0x0)用于记录:0(0x0)回复端口:81695(0x13f1f)目标:{1}'psn':8个字节{{0x0，0x17c17c}(iPhoto)}fEventSourcePSN:{0x0,0x17c17c}(iPhoto)可选属性:<空记录>事件数据:{1}'aevt':-1个项目{钥匙 ' - - ' -{1}'列表':-1个元素{{1}'bmrk':944字节{000:626f 6f6b b003 0000 0000 0110 1000 0000书.........001:c002 0000 0500 0000 0101 0000 5573 6572 ............用户002:7300 0000 0300 0000 0101 0000 706a 6c00 s ...... pjl.003:0800 0000 0101 0000 5069 6374 7572 6573 .......图片004:0e00 0000 0101 0000 6950 686f 746f 204c ........ iPhoto L005:6962 7261 7279 0000 0800 0000 0101 0000库..........006:4d6f 6469 6669 6564 0400 0000 0101 0000修改.....007:3230 3037 0b00 0000 0101 0000 4a75 6e20 2007 ... Jun008:392c 2032 3030 3700 0c00 0000 0101 0000 9，2007 .........009:494d 475f 3633 3837 2e6a 7067 2000 0000 IMG_6387.jpg .......058:0000 0000 30f0 0000 3002 0000 0000 0000 .... 0 ... 0 ....}}}} "alis"类型已由新的Snow Leopard书签"类型替换.如何修改此代码，使其:
a)测试并处理新的'bmrk'类型，即获取文件的绝对路径
b)继续在Tiger and Leopard上开展工作
?
还是我可以通过某种方式告诉操作系统我仍然想要包含"alis"结构的odoc事件?
可以使用Snow Leopard中引入的一些新的CFURL和/或NSURL API处理此处包含的书签数据". typeAlias 代替 I have code in my application that response to "Open Document" (odoc) events. In Mac OS X Tiger and Leopard, this code works fine: Under Mac OS X Snow Leopard, however, this code doesn't work. Here is a dump of an AppleEvent from a Leopard system: Here is a dump of an AppleEvent from a Snow Leopard system: The 'alis' type has been replaced by the new Snow Leopard "bookmark" type. How can I modify this code so that it: a) tests for and handles the new 'bmrk' type, i.e., get the absolute path of the file ? Or is the some way I can tell the OS that I still want odoc events that contain 'alis' structures? The "bookmark data" included here can be handled using some new CFURL and/or NSURL APIs that were introduced in Snow Leopard. +[NSURL URLByResolvingBookmarkData:options:relativeToURL:bookmarkDataIsStale:error] is the NSURL API you can use to resolve the bookmark data included in the event descriptor. You may also be able to coerce the descriptor to an alias using the As for Tiger/Leopard compatibility, you'll never be passed bookmark data on either of those systems, so calling the new NSURL method(s) shouldn't be a problem, since that code path will never be followed on the older systems. BTW, the header file "AEDataModel.h" contains symbolic constants for the four char codes you're using, so you can use 这篇关于处理“打开的文档".雪豹(odoc)事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！'alis'， typeBookmark 而不是'bmrk'等.这往往会使代码更具可读性，并使编译器可以保护您免受错字之类的攻击.</p>- (void) handleOpenDocumentEvent:
(NSAppleEventDescriptor*)event
withReplyEvent:(NSAppleEventDescriptor*)replyEvent
{
NSAppleEventDescriptor const *const dirObj =
[event descriptorForKeyword:keyDirectObject];
DescType const dirObjType = [dirObj descriptorType];
if ( dirObjType == 'alis' ) {
//
// Open a single file.
//
NSData const *const data = [dirObj data];
AliasHandle const fileHandle =
reinterpret_cast<AliasHandle>( ::NewHandle( [data length] ) );
if ( fileHandle ) {
[data getBytes:*fileHandle];
err = [self queueFile:fileHandle fromSender:senderSig];
}
} else if ( dirObjType == 'list' ) {
//
// Open multiple files.
//
AliasHandle fileHandle =
reinterpret_cast<AliasHandle>( ::NewHandle( 0 ) );
if ( fileHandle ) {
int const numItems = [dirObj numberOfItems];
for ( int i = 1; i <= numItems; ++i ) {
NSData const *const data = [[dirObj descriptorAtIndex:i] data];
::SetHandleSize( reinterpret_cast<Handle>( fileHandle ), [data length] );
if ( (err = ::MemError()) != noErr )
break;
[data getBytes:*fileHandle];
err = [self queueFile:fileHandle fromSender:senderSig];
if ( err != noErr )
break;
}
}
}
}
{ 1 } 'aevt': aevt/odoc (i386){
return id: 1012269061 (0x3c560005)
transaction id: 0 (0x0)
interaction level: 112 (0x70)
reply required: 0 (0x0)
remote: 0 (0x0)
for recording: 0 (0x0)
reply port: 150031 (0x24a0f)
target:
{ 1 } 'psn ': 8 bytes {
{ 0x0, 0x655655 } (iPhoto)
}
fEventSourcePSN: { 0x0,0x655655 } (iPhoto)
optional attributes:
< empty record >
event data:
{ 1 } 'aevt': - 1 items {
key '----' -
{ 1 } 'list': - 1 elements {
{ 1 } 'alis': 326 bytes {
/Users/pjl/Pictures/IMG_8501.JPG
}
}
}
}
{ 1 } 'aevt': aevt/odoc (i386){
return id: 5173 (0x1435)
transaction id: 0 (0x0)
interaction level: 112 (0x70)
reply required: 0 (0x0)
remote: 0 (0x0)
for recording: 0 (0x0)
reply port: 81695 (0x13f1f)
target:
{ 1 } 'psn ': 8 bytes {
{ 0x0, 0x17c17c } (iPhoto)
}
fEventSourcePSN: { 0x0,0x17c17c } (iPhoto)
optional attributes:
< empty record >
event data:
{ 1 } 'aevt': - 1 items {
key '----' -
{ 1 } 'list': - 1 elements {
{ 1 } 'bmrk': 944 bytes {
000: 626f 6f6b b003 0000 0000 0110 1000 0000 book............
001: c002 0000 0500 0000 0101 0000 5573 6572 ............User
002: 7300 0000 0300 0000 0101 0000 706a 6c00 s...........pjl.
003: 0800 0000 0101 0000 5069 6374 7572 6573 ........Pictures
004: 0e00 0000 0101 0000 6950 686f 746f 204c ........iPhoto L
005: 6962 7261 7279 0000 0800 0000 0101 0000 ibrary..........
006: 4d6f 6469 6669 6564 0400 0000 0101 0000 Modified........
007: 3230 3037 0b00 0000 0101 0000 4a75 6e20 2007........Jun
008: 392c 2032 3030 3700 0c00 0000 0101 0000 9, 2007.........
009: 494d 475f 3633 3837 2e6a 7067 2000 0000 IMG_6387.jpg ...
....
058: 0000 0000 30f0 0000 3002 0000 0000 0000 ....0...0.......
}
}
}
}
b) continues to work on Tiger and LeopardcoerceToDescriptorType: method and handle it that way, thought it's not documented whether or not Snow Leopard includes a built-in coercion handler for this (it sure seems like it should though).typeAlias instead of 'alis', typeBookmark instead of 'bmrk', and so forth. That tends to make the code a little more readable and lets the compiler protect you against typos and such.
