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/*
Copyright (C) 2007-2009 Inverse inc.
Copyright (C) 2004 SKYRIX Software AG
This file is part of SOGo.
SOGo is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
SOGo is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with OGo; see the file COPYING. If not, write to the
Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/
#import <Foundation/NSNull.h>
#import <NGExtensions/NSObject+Logs.h>
#import <UI/MailerUI/WOContext+UIxMailer.h>
#import "UIxMailPartViewer.h"
#import "UIxMailRenderingContext.h"
/*
UIxMailPartAlternativeViewer
Display multipart/alternative parts. Most common application is for messages
which contain text/html and text/plain, but it is also used in other
contexts, eg in OGo appointment mails.
TODO: We might want to give the user the possibility to access all parts
of the alternative set.
*/
@interface UIxMailPartAlternativeViewer : UIxMailPartViewer
{
id childInfo;
NSUInteger childIndex;
}
@end
@implementation UIxMailPartAlternativeViewer
- (void) dealloc
{
[childInfo release];
[super dealloc];
}
/* caches */
- (void) resetBodyInfoCaches
{
[childInfo release]; childInfo = nil;
childIndex = 0;
[super resetBodyInfoCaches];
}
/* part selection */
- (NSArray *) childPartTypes
{
NSMutableArray *types;
NSUInteger i, count;
NSArray *childParts;
childParts = [[self bodyInfo] valueForKey:@"parts"];
count = [childParts count];
types = [NSMutableArray arrayWithCapacity:count];
for (i = 0; i < count; i++) {
NSString *mt, *st;
mt = [[[childParts objectAtIndex:i] valueForKey:@"type"] lowercaseString];
st = [[[childParts objectAtIndex:i] valueForKey:@"subtype"]
lowercaseString];
mt = [[mt stringByAppendingString:@"/"] stringByAppendingString:st];
[types addObject:mt ? (id)mt : (id)[NSNull null]];
}
return types;
}
- (NSUInteger) _preferredTypesPart: (NSArray *) types
{
NSUInteger count, max;
NSUInteger part;
const NSString *priorities[] = { @"multipart/related", @"multipart/mixed",
@"text/calendar", @"text/html",
@"text/plain" };
part = NSNotFound;
max = sizeof (priorities) / sizeof (NSString *);
for (count = 0; count < max; count++)
{
part = [types indexOfObject: priorities[count]];
if (part != NSNotFound)
break;
}
return part;
}
- (int) _selectPartIndexFromTypes: (NSArray *) _types
{
/* returns the index of the selected part or NSNotFound */
NSUInteger count, max, part;
part = [self _preferredTypesPart: _types];
if (part == NSNotFound)
{
max = [_types count];
/* then we scan for other text types and choose the first one found */
for (count = 0; count < max; count++)
if ([[_types objectAtIndex: count] hasPrefix:@"text/"])
{
part = count;
break;
}
}
if (part == NSNotFound)
part = 0; /* as a fallback, we select the first available part */
return part;
}
- (void) selectChildInfo
{
NSUInteger idx;
[childInfo release]; childInfo = nil;
childIndex = 0;
idx = [self _selectPartIndexFromTypes: [self childPartTypes]];
if (idx == NSNotFound)
{
[self errorWithFormat:@"could not select a part of types: %@",
[self childPartTypes]];
return;
}
childIndex = idx + 1;
childInfo =
[[[[self bodyInfo] valueForKey:@"parts"] objectAtIndex:idx] retain];
}
/* accessors */
- (id) childInfo
{
if (!childInfo)
[self selectChildInfo];
return childInfo;
}
- (NSUInteger) childIndex
{
if (!childIndex)
[self selectChildInfo];
return childIndex - 1;
}
- (NSString *) childPartName
{
return [NSString stringWithFormat: @"%u",
(unsigned int) ([self childIndex] + 1)];
}
- (id) childPartPath
{
NSArray *pp;
pp = [self partPath];
return [pp count] > 0
? (id)[pp arrayByAddingObject:[self childPartName]]
: (id)[NSArray arrayWithObject:[self childPartName]];
}
/* nested viewers */
- (id) contentViewerComponent
{
id info;
info = [self childInfo];
return [[[self context] mailRenderingContext] viewerForBodyInfo:info];
}
@end /* UIxMailPartAlternativeViewer */
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