WebKit/mac/Misc/WebNSFileManagerExtras.m
changeset 0 4f2f89ce4247
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit/mac/Misc/WebNSFileManagerExtras.m	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,240 @@
+/*
+ * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer. 
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import <WebKit/WebNSFileManagerExtras.h>
+
+#import "WebKitNSStringExtras.h"
+#import "WebNSURLExtras.h"
+#import <JavaScriptCore/Assertions.h>
+#import <WebCore/FoundationExtras.h>
+#import <WebKitSystemInterface.h>
+#import <sys/stat.h>
+
+@implementation NSFileManager (WebNSFileManagerExtras)
+
+- (NSString *)_webkit_carbonPathForPath:(NSString *)posixPath
+{
+    OSStatus error;
+    FSRef ref, rootRef, parentRef;
+    FSCatalogInfo info;
+    NSMutableArray *carbonPathPieces;
+    HFSUniStr255 nameString;
+
+    // Make an FSRef.
+    error = FSPathMakeRef((const UInt8 *)[posixPath fileSystemRepresentation], &ref, NULL);
+    if (error != noErr) {
+        return nil;
+    }
+
+    // Get volume refNum.
+    error = FSGetCatalogInfo(&ref, kFSCatInfoVolume, &info, NULL, NULL, NULL);
+    if (error != noErr) {
+        return nil;
+    }
+
+    // Get root directory FSRef.
+    error = FSGetVolumeInfo(info.volume, 0, NULL, kFSVolInfoNone, NULL, NULL, &rootRef);
+    if (error != noErr) {
+        return nil;
+    }
+
+    // Get the pieces of the path.
+    carbonPathPieces = [NSMutableArray array];
+    for (;;) {
+        error = FSGetCatalogInfo(&ref, kFSCatInfoNone, NULL, &nameString, NULL, &parentRef);
+        if (error != noErr) {
+            return nil;
+        }
+        [carbonPathPieces insertObject:[NSString stringWithCharacters:nameString.unicode length:nameString.length] atIndex:0];
+        if (FSCompareFSRefs(&ref, &rootRef) == noErr) {
+            break;
+        }
+        ref = parentRef;
+    }
+
+    // Volume names need trailing : character.
+    if ([carbonPathPieces count] == 1) {
+        [carbonPathPieces addObject:@""];
+    }
+
+    return [carbonPathPieces componentsJoinedByString:@":"];
+}
+
+typedef struct MetaDataInfo
+{
+    NSString *URLString;
+    NSString *referrer;
+    NSString *path;
+} MetaDataInfo;
+
+static void *setMetaData(void* context)
+{
+    MetaDataInfo *info = (MetaDataInfo *)context;
+    WKSetMetadataURL(info->URLString, info->referrer, info->path);
+    
+    HardRelease(info->URLString);
+    HardRelease(info->referrer);
+    HardRelease(info->path);
+    
+    free(info);
+    return 0;
+}
+
+- (void)_webkit_setMetadataURL:(NSString *)URLString referrer:(NSString *)referrer atPath:(NSString *)path
+{
+    ASSERT(URLString);
+    ASSERT(path);
+
+    NSURL *URL = [NSURL _web_URLWithUserTypedString:URLString];
+    if (URL)
+        URLString = [[URL _web_URLByRemovingUserInfo] _web_userVisibleString];
+ 
+    // Spawn a background thread for WKSetMetadataURL because this function will not return until mds has
+    // journaled the data we're're trying to set. Depending on what other I/O is going on, it can take some
+    // time. 
+    pthread_t tid;
+    pthread_attr_t attr;
+    pthread_attr_init(&attr);
+    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+    MetaDataInfo *info = malloc(sizeof(MetaDataInfo));
+    
+    info->URLString = HardRetainWithNSRelease([URLString copy]);
+    info->referrer = HardRetainWithNSRelease([referrer copy]);
+    info->path = HardRetainWithNSRelease([path copy]);
+
+    pthread_create(&tid, &attr, setMetaData, info);
+    pthread_attr_destroy(&attr);
+}
+
+- (NSString *)_webkit_startupVolumeName
+{
+    NSString *path = [self _webkit_carbonPathForPath:@"/"];
+    return [path substringToIndex:[path length]-1];
+}
+
+// -[NSFileManager fileExistsAtPath:] returns NO if there is a broken symlink at the path.
+// So we use this function instead, which returns YES if there is anything there, including
+// a broken symlink.
+static BOOL fileExists(NSString *path)
+{
+    struct stat statBuffer;
+    return !lstat([path fileSystemRepresentation], &statBuffer);
+}
+
+- (NSString *)_webkit_pathWithUniqueFilenameForPath:(NSString *)path
+{
+    // "Fix" the filename of the path.
+    NSString *filename = [[path lastPathComponent] _webkit_filenameByFixingIllegalCharacters];
+    path = [[path stringByDeletingLastPathComponent] stringByAppendingPathComponent:filename];
+
+    if (fileExists(path)) {
+        // Don't overwrite existing file by appending "-n", "-n.ext" or "-n.ext.ext" to the filename.
+        NSString *extensions = nil;
+        NSString *pathWithoutExtensions;
+        NSString *lastPathComponent = [path lastPathComponent];
+        NSRange periodRange = [lastPathComponent rangeOfString:@"."];
+        
+        if (periodRange.location == NSNotFound) {
+            pathWithoutExtensions = path;
+        } else {
+            extensions = [lastPathComponent substringFromIndex:periodRange.location + 1];
+            lastPathComponent = [lastPathComponent substringToIndex:periodRange.location];
+            pathWithoutExtensions = [[path stringByDeletingLastPathComponent] stringByAppendingPathComponent:lastPathComponent];
+        }
+
+        for (unsigned i = 1; ; i++) {
+            NSString *pathWithAppendedNumber = [NSString stringWithFormat:@"%@-%d", pathWithoutExtensions, i];
+            path = [extensions length] ? [pathWithAppendedNumber stringByAppendingPathExtension:extensions] : pathWithAppendedNumber;
+            if (!fileExists(path))
+                break;
+        }
+    }
+
+    return path;
+}
+
+@end
+
+#ifdef BUILDING_ON_TIGER
+
+@implementation NSFileManager (WebNSFileManagerTigerForwardCompatibility)
+
+- (NSArray *)contentsOfDirectoryAtPath:(NSString *)path error:(NSError **)error
+{
+    // We don't report errors via the NSError* output parameter, so ensure that the caller does not expect us to do so.
+    ASSERT_ARG(error, !error);
+
+    return [self directoryContentsAtPath:path];
+}
+
+- (NSString *)destinationOfSymbolicLinkAtPath:(NSString *)path error:(NSError **)error
+{
+    // We don't report errors via the NSError* output parameter, so ensure that the caller does not expect us to do so.
+    ASSERT_ARG(error, !error);
+
+    return [self pathContentOfSymbolicLinkAtPath:path];
+}
+
+- (NSDictionary *)attributesOfFileSystemForPath:(NSString *)path error:(NSError **)error
+{
+    // We don't report errors via the NSError* output parameter, so ensure that the caller does not expect us to do so.
+    ASSERT_ARG(error, !error);
+
+    return [self fileSystemAttributesAtPath:path];
+}
+
+- (NSDictionary *)attributesOfItemAtPath:(NSString *)path error:(NSError **)error
+{
+    // We don't report errors via the NSError* output parameter, so ensure that the caller does not expect us to do so.
+    ASSERT_ARG(error, !error);
+
+    return [self fileAttributesAtPath:path traverseLink:NO];
+}
+
+- (BOOL)moveItemAtPath:(NSString *)srcPath toPath:(NSString *)dstPath error:(NSError **)error
+{
+    // The implementation of moveItemAtPath:toPath:error: interacts with the NSFileManager's delegate.
+    // We are not matching that behaviour at the moment, but it should not be a problem as any client
+    // expecting that would need to call setDelegate: first which will generate a compile-time warning,
+    // as that method is not available on Tiger.
+    return [self movePath:srcPath toPath:dstPath handler:nil];
+}
+
+- (BOOL)removeItemAtPath:(NSString *)path error:(NSError **)error
+{
+    // The implementation of removeItemAtPath:error: interacts with the NSFileManager's delegate.
+    // We are not matching that behaviour at the moment, but it should not be a problem as any client
+    // expecting that would need to call setDelegate: first which will generate a compile-time warning,
+    // as that method is not available on Tiger.
+    return [self removeFileAtPath:path handler:nil];
+}
+
+@end
+
+#endif