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//
// LabelsListController.m
// Notation
//
// Created by Zachary Schneirov on 1/10/06.
/*Copyright (c) 2010, Zachary Schneirov. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted
provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
- 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.
- Neither the name of Notational Velocity nor the names of its contributors may be used to endorse
or promote products derived from this software without specific prior written permission. */
#import "LabelsListController.h"
#import "LabelObject.h"
#import "NoteObject.h"
#import "NSCollection_utils.h"
@implementation LabelsListController
- (id)init {
if ([super init]) {
allLabels = [[NSCountedSet alloc] init]; //authoritative
//for faster(?) filtering during search
filteredLabels = [[NSCountedSet alloc] init];
removeIndicies = NULL;
}
return self;
}
- (void)unfilterLabels {
[filteredLabels setSet:allLabels];
if ([filteredLabels count] > count) {
count = [filteredLabels count];
objects = (id*)realloc(objects, count * sizeof(id));
}
[filteredLabels getObjects:objects];
}
- (void)filterLabelSet:(NSSet*)labelSet {
[filteredLabels minusSet:labelSet];
}
- (void)recomputeListFromFilteredSet {
//we can ignore our objectsArray here as we never use it and just sort directly on our C-array
[filteredLabels getObjects:objects];
count = [filteredLabels count];
//cfstringcompare here; strings always sorted alphabetically
mergesort((void *)objects, (size_t)count, sizeof(id), (int (*)(const void *, const void *))compareLabel);
}
//NotationController will probably want to filter these further if there is already a search in progress
- (NSSet*)notesAtFilteredIndex:(int)labelIndex {
return [objects[labelIndex] noteSet];
}
//figure out which notes to display given some selected labels
- (NSSet*)notesAtFilteredIndexes:(NSIndexSet*)anIndexSet {
NSUInteger i, numLabels = [anIndexSet count];
NSUInteger *labelsBuffer = malloc(numLabels * sizeof(NSUInteger));
NSRange range = NSMakeRange([anIndexSet firstIndex], ([anIndexSet lastIndex]-[anIndexSet firstIndex]) + 1);
[anIndexSet getIndexes:labelsBuffer maxCount:numLabels inIndexRange:&range];
NSMutableSet *notesOfLabels = [[NSMutableSet alloc] init];
for (i=0; i<numLabels; i++) {
int labelIndex = labelsBuffer[i];
[notesOfLabels unionSet:[objects[labelIndex] noteSet]];
}
return [notesOfLabels autorelease];
}
/* these next two methods do NOT sync. object counts with the corresponding LabelObject(s) in allLabels;
it's up to the sender to ensure that any given note is not added or removed from a label unnecessarily */
//called when deleting labels in a note
- (void)removeLabelSet:(NSSet*)labelSet fromNote:(NoteObject*)note {
//labelSet in this case is probably not the prototype labelSet, so all that may be necessary is to call removeNote: on it
//HOWEVER, don't know this for sure, assuming this API is to remain non-permeable
[allLabels minusSet:labelSet];
//we narrow down the set to make sure that we operate on the actual objects within it, and note the objects used as prototypes
//these will be any labels that were shared by notes other than this one
NSMutableSet *existingLabels = [allLabels setIntersectedWithSet:labelSet];
[existingLabels makeObjectsPerformSelector:@selector(removeNote:) withObject:note];
}
//called for labels added to a note
- (void)addLabelSet:(NSSet*)labelSet toNote:(NoteObject*)note {
[allLabels unionSet:labelSet];
NSMutableSet *existingLabels = [allLabels setIntersectedWithSet:labelSet];
[existingLabels makeObjectsPerformSelector:@selector(addNote:) withObject:note];
[note replaceMatchingLabelSet:existingLabels]; //link back for the existing note, so that it knows about the other notes in this label
}
//useful for moving groups of notes from one label to another
- (void)removeLabelSet:(NSSet*)labelSet fromNoteSet:(NSSet*)notes {
[allLabels minusSet:labelSet];
NSMutableSet *existingLabels = [allLabels setIntersectedWithSet:labelSet];
[existingLabels makeObjectsPerformSelector:@selector(removeNoteSet:) withObject:notes];
}
- (void)addLabelSet:(NSSet*)labelSet toNoteSet:(NSSet*)notes {
[allLabels unionSet:labelSet];
NSMutableSet *existingLabels = [allLabels setIntersectedWithSet:labelSet];
[existingLabels makeObjectsPerformSelector:@selector(addNoteSet:) withObject:notes];
[notes makeObjectsPerformSelector:@selector(replaceMatchingLabelSet:) withObject:existingLabels];
}
@end