Add <PBGitRefish> protocol.

This will simplify methods that execute git commands that can take a ref or an SHA.

Add some string constants so there is only one place for the type strings.

GitX.xcodeproj/project.pbxproj

@@ -208,6 +208,7 @@
 		93F7857E0EA3ABF100C1F443 /* PBCommitMessageView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBCommitMessageView.m; sourceTree = "<group>"; };
 		93FCCBA80EA8AF450061B02B /* PBGitConfig.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBGitConfig.m; sourceTree = "<group>"; };
 		D26DC6440E782C9000C777B2 /* gitx.icns */ = {isa = PBXFileReference; lastKnownFileType = image.icns; path = gitx.icns; sourceTree = "<group>"; };
+		D85B94B710E576B4007F3C28 /* PBGitRefish.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBGitRefish.h; sourceTree = "<group>"; };
 		EB2A73480FEE3F09006601CF /* PBCollapsibleSplitView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBCollapsibleSplitView.h; sourceTree = "<group>"; };
 		EB2A73490FEE3F09006601CF /* PBCollapsibleSplitView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBCollapsibleSplitView.m; sourceTree = "<group>"; };
 		F50A411D0EBB874C00208746 /* mainSplitterBar.tiff */ = {isa = PBXFileReference; lastKnownFileType = image.tiff; name = mainSplitterBar.tiff; path = Images/mainSplitterBar.tiff; sourceTree = "<group>"; };
@@ -625,6 +626,7 @@
 				F5AD56770E79B78100EDAAFE /* PBCommitList.h */,
 				F5AD56780E79B78100EDAAFE /* PBCommitList.m */,
 				F5C6F6750E65FE2B00478D97 /* Graphing */,
+				D85B94B710E576B4007F3C28 /* PBGitRefish.h */,
 				F56524EE0E02D45200F03B52 /* PBGitCommit.h */,
 				F56524EF0E02D45200F03B52 /* PBGitCommit.m */,
 				F5C007730E731B48007B84B2 /* PBGitRef.h */,

PBGitCommit.h

@@ -9,9 +9,14 @@
 #import <Cocoa/Cocoa.h>
 #import "PBGitRepository.h"
 #import "PBGitTree.h"
+#import "PBGitRefish.h"
 #include "git/oid.h"
 
-@interface PBGitCommit : NSObject {
+
+extern NSString * const kGitXCommitType;
+
+
+@interface PBGitCommit : NSObject <PBGitRefish> {
 	git_oid sha;
 	git_oid *parentShas;
 	int nParents;
@@ -35,6 +40,11 @@
 
 - (NSString *)realSha;
 
+// <PBGitRefish>
+- (NSString *) refishName;
+- (NSString *) shortName;
+- (NSString *) refishType;
+
 @property (readonly) git_oid *sha;
 @property (copy) NSString* subject;
 @property (copy) NSString* author;

PBGitCommit.m

@@ -9,6 +9,10 @@
 #import "PBGitCommit.h"
 #import "PBGitDefaults.h"
 
+
+NSString * const kGitXCommitType = @"commit";
+
+
 @implementation PBGitCommit
 
 @synthesize repository, subject, timestamp, author, parentShas, nParents, sign, lineInfo;
@@ -128,4 +132,23 @@
 + (BOOL)isKeyExcludedFromWebScript:(const char *)name {
 	return NO;
 }
+
+
+#pragma mark <PBGitRefish>
+
+- (NSString *) refishName
+{
+	return [self realSha];
+}
+
+- (NSString *) shortName
+{
+	return [[self realSha] substringToIndex:10];
+}
+
+- (NSString *) refishType
+{
+	return kGitXCommitType;
+}
+
 @end

PBGitRef.h

@@ -7,24 +7,34 @@
 //
 
 #import <Cocoa/Cocoa.h>
+#import "PBGitRefish.h"
 
 
+extern NSString * const kGitXTagType;
+extern NSString * const kGitXBranchType;
+extern NSString * const kGitXRemoteType;
+extern NSString * const kGitXRemoteBranchType;
+
 extern NSString * const kGitXTagRefPrefix;
 extern NSString * const kGitXBranchRefPrefix;
 extern NSString * const kGitXRemoteRefPrefix;
 
 
-@interface PBGitRef : NSObject {
+@interface PBGitRef : NSObject <PBGitRefish> {
 	NSString* ref;
 }
 
-- (NSString*) shortName;
+// <PBGitRefish>
+- (NSString *) refishName;
+- (NSString *) shortName;
+- (NSString *) refishType;
+
 - (NSString *) tagName;
 - (NSString *) branchName;
 - (NSString *) remoteName;
 - (NSString *) remoteBranchName;
 
-- (NSString*) type;
+- (NSString *) type;
 - (BOOL) isBranch;
 - (BOOL) isTag;
 - (BOOL) isRemote;

PBGitRef.m

@@ -9,6 +9,11 @@
 #import "PBGitRef.h"
 
 
+NSString * const kGitXTagType    = @"tag";
+NSString * const kGitXBranchType = @"branch";
+NSString * const kGitXRemoteType = @"remote";
+NSString * const kGitXRemoteBranchType = @"remote branch";
+
 NSString * const kGitXTagRefPrefix    = @"refs/tags/";
 NSString * const kGitXBranchRefPrefix = @"refs/heads/";
 NSString * const kGitXRemoteRefPrefix = @"refs/remotes/";
@@ -17,12 +22,6 @@ NSString * const kGitXRemoteRefPrefix = @"refs/remotes/";
 @implementation PBGitRef
 
 @synthesize ref;
-- (NSString*) shortName
-{
-	if ([self type])
-		return [ref substringFromIndex:[[self type] length] + 7];
-	return ref;
-}
 
 - (NSString *) tagName
 {
@@ -56,7 +55,7 @@ NSString * const kGitXRemoteRefPrefix = @"refs/remotes/";
 	return [[self shortName] substringFromIndex:[[self remoteName] length] + 1];;
 }
 
-- (NSString*) type
+- (NSString *) type
 {
 	if ([self isBranch])
 		return @"head";
@@ -100,7 +99,7 @@ NSString * const kGitXRemoteRefPrefix = @"refs/remotes/";
 	if (![self isRemote])
 		return nil;
 
-	return [PBGitRef refFromString:[@"refs/remotes/" stringByAppendingString:[self remoteName]]];
+	return [PBGitRef refFromString:[kGitXRemoteRefPrefix stringByAppendingString:[self remoteName]]];
 }
 
 + (PBGitRef*) refFromString: (NSString*) s
@@ -123,4 +122,32 @@ NSString * const kGitXRemoteRefPrefix = @"refs/remotes/";
 	return NO;
 }
 
+
+#pragma mark <PBGitRefish>
+
+- (NSString *) refishName
+{
+	return ref;
+}
+
+- (NSString *) shortName
+{
+	if ([self type])
+		return [ref substringFromIndex:[[self type] length] + 7];
+	return ref;
+}
+
+- (NSString *) refishType
+{
+	if ([self isBranch])
+		return kGitXBranchType;
+	if ([self isTag])
+		return kGitXTagType;
+	if ([self isRemoteBranch])
+		return kGitXRemoteBranchType;
+	if ([self isRemote])
+		return kGitXRemoteType;
+	return nil;
+}
+
 @end

PBGitRefish.h

@@ -0,0 +1,27 @@
+//
+//  PBGitRefish.h
+//  GitX
+//
+//  Created by Nathan Kinsinger on 12/25/09.
+//  Copyright 2009 Nathan Kinsinger. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+
+//  Several git commands can take a ref "refs/heads/master" or an SHA.
+//  Use <PBGitRefish> to accept a PBGitRef or a PBGitCommit without having to write
+//  two separate methods.
+//
+//  refishName  the full name of the ref "refs/heads/master" or the full SHA
+//              used in git commands
+//  shortName   a more user friendly version of the refName, "master" or a short SHA
+//  refishType  a short name for the type
+
+@protocol PBGitRefish <NSObject>
+
+- (NSString *) refishName;
+- (NSString *) shortName;
+- (NSString *) refishType;
+
+@end