Re: NSDocument custom file Package or URL override?
On 5/17/13 8:11 AM, Trygve Inda wrote: One issue is that when opening my document (the package may contain several thousand files) I only really need to load one file (the plist) and then there rest of the files are images that are only read as needed... So I will need to have my doc keep a reference to the package location to read these images outside of the normal save/read methods. In looking at the docs: - (BOOL)readFromURL:(NSURL *)absoluteURL ofType:(NSString *)typeName error:(NSError **)outError it says " Sets the contents of this document by reading from a file or file package, of a specified type, located by a URL." So this seems to work for document packages too?? Yes, sure, but: An alternative is to hold on to the packages sub-wrappers and read their content on demand only. No one forces you to load the wrappers' contents at the time your document is opened, so you would only actually load your plist and keep the other wrappers around. That also gives you to possibility to reuse the wrappers when you need to save your document. When you reuse an "old" wrapper (say because the content of the file the wrapper represents didn't change), it dramatically shortens the time needed to save the document - if you have many files to save and/or if they are big. That's because the content won't be written twice, the system just creates a hard link to the original file on the disk. Regards Markus -- __ Markus Spoettl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSDocument custom file Package or URL override?
> On 5/15/13 5:14 PM, Trygve Inda wrote: >> My document format needs to look like: >> >> File (actually a directory marked as a package) >> -- MyData.plist >> -> Images (directory) >> > Image1.png >> > Image2.png >> -> Data (directory) >> > Data1.dat >> > Data2.dat >> -> Icons (directory) >> > Icon1.png >> > Icon1.png >> >> >> In my NSDocument subclass, Overriding: >> >> - (BOOL)readFromFileWrapper:(NSFileWrapper *)fileWrapper >> ofType:(NSString *)typeName error:(NSError **)outError >> >> Doesn't seem to be the right thing to do since it seems to want to put all >> the files in a single flat directory within the package > > It's the right place. You'll get a filewrapper representing the > document-package > directory (the root). From there, you can query the root wrapper for > sub-wrappers using -fileWrappers (use -isDirectory and -isRegularFile to find > out if a wrapper contains other wrappers). > > For writing the document, you'll overwrite -fileWrapperOfType:error: and > return > a root wrapper that contains your entire package structure. You can construct > the interior of your package format to your liking, you can also add > directories > by adding a file wrapper that represents a directory - created via > -initDirectoryWithFileWrappers: > > The NSDocument guide contains a section about using wrappers and demos the > basics: > > http://developer.apple.com/library/mac/#documentation/DataManagement/Conceptua > l/DocBasedAppProgrammingGuideForOSX/AdvancedTopics/AdvancedTopics.html > > Regards > Markus One issue is that when opening my document (the package may contain several thousand files) I only really need to load one file (the plist) and then there rest of the files are images that are only read as needed... So I will need to have my doc keep a reference to the package location to read these images outside of the normal save/read methods. In looking at the docs: - (BOOL)readFromURL:(NSURL *)absoluteURL ofType:(NSString *)typeName error:(NSError **)outError it says " Sets the contents of this document by reading from a file or file package, of a specified type, located by a URL." So this seems to work for document packages too?? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSDocument custom file Package or URL override?
On 5/15/13 5:14 PM, Trygve Inda wrote: My document format needs to look like: File (actually a directory marked as a package) -- MyData.plist -> Images (directory) > Image1.png > Image2.png -> Data (directory) > Data1.dat > Data2.dat -> Icons (directory) > Icon1.png > Icon1.png In my NSDocument subclass, Overriding: - (BOOL)readFromFileWrapper:(NSFileWrapper *)fileWrapper ofType:(NSString *)typeName error:(NSError **)outError Doesn't seem to be the right thing to do since it seems to want to put all the files in a single flat directory within the package It's the right place. You'll get a filewrapper representing the document-package directory (the root). From there, you can query the root wrapper for sub-wrappers using -fileWrappers (use -isDirectory and -isRegularFile to find out if a wrapper contains other wrappers). For writing the document, you'll overwrite -fileWrapperOfType:error: and return a root wrapper that contains your entire package structure. You can construct the interior of your package format to your liking, you can also add directories by adding a file wrapper that represents a directory - created via -initDirectoryWithFileWrappers: The NSDocument guide contains a section about using wrappers and demos the basics: http://developer.apple.com/library/mac/#documentation/DataManagement/Conceptual/DocBasedAppProgrammingGuideForOSX/AdvancedTopics/AdvancedTopics.html Regards Markus -- __ Markus Spoettl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSDocument custom file Package or URL override?
My document format needs to look like: File (actually a directory marked as a package) -- MyData.plist -> Images (directory) > Image1.png > Image2.png -> Data (directory) > Data1.dat > Data2.dat -> Icons (directory) > Icon1.png > Icon1.png In my NSDocument subclass, Overriding: - (BOOL)readFromFileWrapper:(NSFileWrapper *)fileWrapper ofType:(NSString *)typeName error:(NSError **)outError Doesn't seem to be the right thing to do since it seems to want to put all the files in a single flat directory within the package Overriding: -(BOOL)readFromURL:(NSURL *)inAbsoluteURL ofType:(NSString *)inTypeName error:(NSError **)outError This seems a bit better but seems designed to read from a single file... Can that file be my directory/package. What is the best way to do this? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
