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PDFDocument_SKExtensions.m
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PDFDocument_SKExtensions.m
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//
// PDFDocument_SKExtensions.m
// Skim
//
// Created by Christiaan Hofman on 2/17/08.
/*
This software is Copyright (c) 2008-2010
Christiaan Hofman. 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 Christiaan Hofman nor the names of any
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
OWNER OR 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 "PDFDocument_SKExtensions.h"
#import "PDFSelection_SKExtensions.h"
#import "NSNumber_SKExtensions.h"
#import "PDFPage_SKExtensions.h"
@interface PDFDocument (SKApplePrivateDeclarations)
- (CGPDFDocumentRef)documentRef;
@end
@implementation PDFDocument (SKExtensions)
- (PDFSelection *)selectionByExtendingSelection:(PDFSelection *)selection toPage:(PDFPage *)page atPoint:(NSPoint)point {
PDFSelection *sel = selection;
if ([selection hasCharacters]) {
PDFPage *firstPage = [selection safeFirstPage];
PDFPage *lastPage = [selection safeLastPage];
NSUInteger pageIndex = [self indexForPage:page];
NSUInteger firstPageIndex = [self indexForPage:firstPage];
NSUInteger lastPageIndex = [self indexForPage:lastPage];
NSUInteger firstChar = [selection safeIndexOfFirstCharacterOnPage:firstPage];
NSUInteger lastChar = [selection safeIndexOfLastCharacterOnPage:lastPage];
NSRect firstRect, lastRect;
if (firstChar != NSNotFound) {
firstRect = [firstPage characterBoundsAtIndex:firstChar];
} else {
NSRect bounds = [selection boundsForPage:firstPage];
firstRect = NSMakeRect(NSMinX(bounds), NSMaxY(bounds) - 10.0, 5.0, 10.0);
}
if (lastChar != NSNotFound && lastChar != 0) {
lastRect = [lastPage characterBoundsAtIndex:lastChar - 1];
} else {
NSRect bounds = [selection boundsForPage:lastPage];
lastRect = NSMakeRect(NSMaxX(bounds) - 5.0, NSMinY(bounds), 5.0, 10.0);
}
if (pageIndex < firstPageIndex || (pageIndex == firstPageIndex && (point.y > NSMaxY(firstRect) || (point.y > NSMinY(firstRect) && point.x < NSMinX(firstRect)))))
sel = [self selectionFromPage:page atPoint:point toPage:lastPage atPoint:NSMakePoint(NSMaxX(lastRect), NSMidY(lastRect))];
if (pageIndex > lastPageIndex || (pageIndex == lastPageIndex && (point.y < NSMinY(lastRect) || (point.y < NSMaxY(lastRect) && point.x > NSMaxX(lastRect)))))
sel = [self selectionFromPage:firstPage atPoint:NSMakePoint(NSMinX(firstRect), NSMidY(firstRect)) toPage:page atPoint:point];
}
return sel;
}
- (NSArray *)pageLabels {
NSUInteger pageCount = [self pageCount];
NSMutableArray *pageLabels = [NSMutableArray array];
BOOL useSequential = [[self pageClass] usesSequentialPageNumbering];
if (useSequential == NO && [self respondsToSelector:@selector(documentRef)]) {
CGPDFDocumentRef doc = (CGPDFDocumentRef)[self documentRef];
CGPDFDictionaryRef catalog = CGPDFDocumentGetCatalog(doc);
CGPDFDictionaryRef labelsDict = NULL;
CGPDFArrayRef labelsArray = NULL;
if (catalog) {
if(false == CGPDFDictionaryGetDictionary(catalog, "PageLabels", &labelsDict)) {
useSequential = YES;
} else if (CGPDFDictionaryGetArray(labelsDict, "Nums", &labelsArray)) {
size_t i = CGPDFArrayGetCount(labelsArray);
CGPDFInteger j = pageCount;
while (i > 0) {
CGPDFInteger labelIndex;
CGPDFDictionaryRef labelDict = NULL;
const char *labelStyle;
CGPDFStringRef labelPDFPrefix;
NSString *labelPrefix;
CGPDFInteger labelStart;
if (false == CGPDFArrayGetDictionary(labelsArray, --i, &labelDict) ||
false == CGPDFArrayGetInteger(labelsArray, --i, &labelIndex)) {
[pageLabels removeAllObjects];
break;
}
if (false == CGPDFDictionaryGetName(labelDict, "S", &labelStyle))
labelStyle = NULL;
if (CGPDFDictionaryGetString(labelDict, "P", &labelPDFPrefix))
labelPrefix = [(NSString *)CGPDFStringCopyTextString(labelPDFPrefix) autorelease];
else
labelPrefix = nil;
if (false == CGPDFDictionaryGetInteger(labelDict, "St", &labelStart))
labelStart = 1;
while (j > labelIndex) {
NSNumber *labelNumber = [NSNumber numberWithInteger:--j - labelIndex + labelStart];
NSMutableString *string = [NSMutableString string];
if (labelPrefix)
[string appendString:labelPrefix];
if (labelStyle) {
if (0 == strcmp(labelStyle, "D"))
[string appendFormat:@"%@", labelNumber];
else if (0 == strcmp(labelStyle, "R"))
[string appendString:[[labelNumber romanNumeralValue] uppercaseString]];
else if (0 == strcmp(labelStyle, "r"))
[string appendString:[labelNumber romanNumeralValue]];
else if (0 == strcmp(labelStyle, "A"))
[string appendString:[[labelNumber alphaCounterValue] uppercaseString]];
else if (0 == strcmp(labelStyle, "a"))
[string appendString:[labelNumber alphaCounterValue]];
}
[pageLabels insertObject:string atIndex:0];
}
}
}
}
}
if ([pageLabels count] != pageCount) {
NSUInteger i;
for (i = 0; i < pageCount; i++)
[pageLabels addObject:useSequential ? [NSString stringWithFormat:@"%lu", (unsigned long)(i + 1)] : [[self pageAtIndex:i] displayLabel]];
}
return pageLabels;
}
@end