gecko-dev/chimera/CHRDFOutlineViewDataSource.mm

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Goodger <ben@netscape.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#import "CHRDFOutlineViewDataSource.h"
#include "nsIRDFDataSource.h"
#include "nsIRDFService.h"
#include "nsIRDFLiteral.h"
#include "nsIRDFResource.h"
#include "nsIRDFContainer.h"
#include "nsIRDFContainerUtils.h"
#include "nsRDFCID.h"
#include "nsComponentManagerUtils.h"
#include "nsIServiceManagerUtils.h"
#include "nsXPIDLString.h"
#include "nsString.h"
@implementation CHRDFOutlineViewDataSource
- (void) ensureDataSourceLoaded
{
nsCOMPtr<nsIRDFContainer> ctr = do_CreateInstance("@mozilla.org/rdf/container;1");
NS_ADDREF(mContainer = ctr);
nsCOMPtr<nsIRDFContainerUtils> ctrUtils = do_GetService("@mozilla.org/rdf/container-utils;1");
NS_ADDREF(mContainerUtils = ctrUtils);
nsCOMPtr<nsIRDFService> rdfService = do_GetService("@mozilla.org/rdf/rdf-service;1");
NS_ADDREF(mRDFService = rdfService);
mDataSource = nsnull;
mRootResource = nsnull;
mDictionary = [[NSMutableDictionary alloc] initWithCapacity: 30];
}
- (void) dealloc
{
NS_IF_RELEASE(mContainer);
NS_IF_RELEASE(mContainerUtils);
NS_IF_RELEASE(mRDFService);
NS_IF_RELEASE(mDataSource);
NS_IF_RELEASE(mRootResource);
[mDictionary release];
[super dealloc];
}
- (nsIRDFDataSource*) dataSource
{
NS_IF_ADDREF(mDataSource);
return mDataSource;
}
- (nsIRDFResource*) rootResource
{
NS_IF_ADDREF(mRootResource);
return mRootResource;
}
- (void) setDataSource: (nsIRDFDataSource*) aDataSource
{
nsIRDFDataSource* oldDataSource = mDataSource;
NS_IF_ADDREF(mDataSource = aDataSource);
NS_IF_RELEASE(oldDataSource);
}
- (void) setRootResource: (nsIRDFResource*) aResource
{
nsIRDFResource* oldResource = mRootResource;
NS_IF_ADDREF(mRootResource = aResource);
NS_IF_RELEASE(oldResource);
}
//
// XXX - For now, we'll just say that none of our items are editable, as we aren't using any
// RDF datasources that are mutable.
//
- (BOOL) outlineView: (NSOutlineView*) aOutlineView shouldEditTableColumn: (NSTableColumn*) aTableColumn
item: (id) aItem
{
return NO;
}
- (BOOL) outlineView: (NSOutlineView*) aOutlineView isItemExpandable: (id) aItem
{
if (!mDataSource)
return NO;
if (!aItem)
return YES; // The root is always open
nsCOMPtr<nsIRDFResource> itemResource = dont_AddRef([aItem resource]);
PRBool isSeq = PR_FALSE;
mContainerUtils->IsSeq(mDataSource, itemResource, &isSeq);
if (isSeq)
return YES;
nsCOMPtr<nsIRDFResource> childProperty;
mRDFService->GetResource("http://home.netscape.com/NC-rdf#child", getter_AddRefs(childProperty));
nsCOMPtr<nsIRDFNode> childNode;
mDataSource->GetTarget(itemResource, childProperty, PR_TRUE, getter_AddRefs(childNode));
return childNode != nsnull;
}
- (id) outlineView: (NSOutlineView*) aOutlineView child: (int) aIndex
ofItem: (id) aItem
{
if (!mDataSource)
return nil;
nsCOMPtr<nsIRDFResource> resource = !aItem ? dont_AddRef([self rootResource]) : dont_AddRef([aItem resource]);
nsCOMPtr<nsIRDFResource> ordinalResource;
mContainerUtils->IndexToOrdinalResource(aIndex + 1, getter_AddRefs(ordinalResource));
nsCOMPtr<nsIRDFNode> childNode;
mDataSource->GetTarget(resource, ordinalResource, PR_TRUE, getter_AddRefs(childNode));
if (childNode) {
// Yay. A regular container. We don't need to count, we can go directly to
// our object.
nsCOMPtr<nsIRDFResource> childResource(do_QueryInterface(childNode));
if (childResource)
return [self MakeWrapperFor:childResource];
}
else
{
// Oh well, not a regular container. We need to count, dagnabbit.
nsCOMPtr<nsIRDFResource> childProperty;
mRDFService->GetResource("http://home.netscape.com/NC-rdf#child", getter_AddRefs(childProperty));
nsCOMPtr<nsISimpleEnumerator> childNodes;
mDataSource->GetTargets(resource, childProperty, PR_TRUE, getter_AddRefs(childNodes));
nsCOMPtr<nsISupports> supp;
PRInt32 count = 0;
PRBool hasMore = PR_FALSE;
while (NS_SUCCEEDED(childNodes->HasMoreElements(&hasMore)) && hasMore)
{
childNodes->GetNext(getter_AddRefs(supp));
if (count == aIndex)
break;
count ++;
}
nsCOMPtr<nsIRDFResource> childResource(do_QueryInterface(supp));
if (childResource) {
return [self MakeWrapperFor:childResource];
}
}
return nil;
}
- (int) outlineView: (NSOutlineView*) aOutlineView numberOfChildrenOfItem: (id) aItem;
{
if (!mDataSource)
return 0;
nsCOMPtr<nsIRDFResource> resource = dont_AddRef(aItem ? [aItem resource] : [self rootResource]);
// XXX just assume NC:child is the only containment arc for now
nsCOMPtr<nsIRDFResource> childProperty;
mRDFService->GetResource("http://home.netscape.com/NC-rdf#child", getter_AddRefs(childProperty));
nsCOMPtr<nsISimpleEnumerator> childNodes;
mDataSource->GetTargets(resource, childProperty, PR_TRUE, getter_AddRefs(childNodes));
PRBool hasMore = PR_FALSE;
PRInt32 count = 0;
while (NS_SUCCEEDED(childNodes->HasMoreElements(&hasMore)) && hasMore)
{
nsCOMPtr<nsISupports> supp;
childNodes->GetNext(getter_AddRefs(supp));
count ++;
}
if (count == 0) {
nsresult rv = mContainer->Init(mDataSource, resource);
if (NS_FAILED(rv))
return 0;
mContainer->GetCount(&count);
}
return count;
}
- (id) outlineView: (NSOutlineView*) aOutlineView objectValueForTableColumn: (NSTableColumn*) aTableColumn
byItem: (id) aItem
{
if (!mDataSource || !aItem)
return nil;
// The table column's identifier is the RDF Resource URI of the property being displayed in
// that column, e.g. "http://home.netscape.com/NC-rdf#Name"
NSString* columnPropertyURI = [aTableColumn identifier];
nsCOMPtr<nsIRDFResource> propertyResource;
mRDFService->GetResource([columnPropertyURI cString], getter_AddRefs(propertyResource));
nsCOMPtr<nsIRDFResource> resource = dont_AddRef([aItem resource]);
nsCOMPtr<nsIRDFNode> valueNode;
mDataSource->GetTarget(resource, propertyResource, PR_TRUE, getter_AddRefs(valueNode));
if (!valueNode) {
#if DEBUG
NSLog(@"ValueNode is null in RDF objectValueForTableColumn");
#endif
return nil;
}
nsCOMPtr<nsIRDFLiteral> valueLiteral(do_QueryInterface(valueNode));
if (!valueLiteral)
return nil;
nsXPIDLString literalValue;
valueLiteral->GetValue(getter_Copies(literalValue));
return [NSString stringWithCharacters: literalValue.get() length:literalValue.Length()];
}
- (void) outlineView: (NSOutlineView*) aOutlineView setObjectValue: (id) aObject
forTableColumn: (NSTableColumn*) aTableColumn
byItem: (id) aItem
{
}
- (void) reloadDataForItem: (id) aItem reloadChildren: (BOOL) aReloadChildren
{
if (!aItem)
[mOutlineView reloadData];
else
[mOutlineView reloadItem: aItem reloadChildren: aReloadChildren];
}
- (id) MakeWrapperFor: (nsIRDFResource*) aRDFResource
{
RDFOutlineViewItem* item = [[[RDFOutlineViewItem alloc] init] autorelease];
[item setResource: aRDFResource];
// keep a copy around
const char* resourceValue;
aRDFResource->GetValueConst(&resourceValue);
[mDictionary setObject:item forKey:[NSString stringWithCString:resourceValue]];
return item;
}
@end
@implementation RDFOutlineViewItem
- (void) dealloc
{
NS_IF_RELEASE(mResource);
[super dealloc];
}
- (nsIRDFResource*) resource
{
NS_IF_ADDREF(mResource);
return mResource;
}
- (void) setResource: (nsIRDFResource*) aResource
{
nsIRDFResource* oldResource = mResource;
NS_IF_ADDREF(mResource = aResource);
NS_IF_RELEASE(oldResource);
}
@end