codello/mathpad
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Corrected Some Formatting Issues

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This commit is contained in:
Kim Wittenburg
2014-04-20 15:02:20 +02:00
parent 8b5a69b885
commit 35215923ef
4 changed files with 89 additions and 44 deletions
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112
MathPad/MPExpression.m
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@@ -10,6 +10,8 @@
#import "MPFunction.h"
#import "MPException.h"
#import "NSObject+MPStringTest.h"
NSString *MPAdditionOperator = @"+";
NSString *MPSubtractionOperator = @"-";
NSString *MPMultiplicationOperator = @"*";
@@ -21,7 +23,9 @@ NSString *MPDivisionOperator = @"/";
- (void)validateSymbols:(NSArray *)symbols;
- (NSArray *)repairedSymbols:(NSArray *)symbols; // Merges subsequent strings
- (void)repairSymbols:(NSMutableArray *)symbols;
- (void)getSplitOffset:(out NSUInteger *)offset inSymbolAtIndex:(out NSUInteger *)symbolIndex forSplitLocation:(NSUInteger)loc;
- (void)getSplitOffset:(out NSUInteger *)offset
inSymbolAtIndex:(out NSUInteger *)symbolIndex
forSplitLocation:(NSUInteger)loc;
@end
@@ -98,7 +102,7 @@ NSString *MPDivisionOperator = @"/";
- (NSInteger)lengthOfSymbol:(id)symbol
{
if ([symbol isKindOfClass:[NSString class]]) {
if ([symbol isString]) {
return [symbol length];
}
return 1;
@@ -108,7 +112,7 @@ NSString *MPDivisionOperator = @"/";
- (void)validateSymbols:(NSArray *)symbols
{
for (id symbol in symbols) {
if (!([symbol isKindOfClass:[NSString class]]
if (!([symbol isString]
|| [symbol isKindOfClass:[MPFunction class]])) {
@throw [NSException exceptionWithName:MPIllegalSymbolException
reason:@"Only NSString and MPFunction objects are valid symbols."
@@ -127,19 +131,26 @@ NSString *MPDivisionOperator = @"/";
- (void)repairSymbols:(NSMutableArray *)symbols
{
for (NSInteger index = 1; index < symbols.count; index++) {
id last = symbols[index-1];
for (NSInteger index = 0; index < symbols.count; index++) {
id next = index+1 < symbols.count ? symbols[index+1] : nil;
id current = symbols[index];
if ([last isKindOfClass:[NSString class]] && [current isKindOfClass:[NSString class]]) {
NSString *new = [NSString stringWithFormat:@"%@%@", last, current];
[symbols replaceObjectAtIndex:index-1 withObject:new];
[symbols removeObjectAtIndex:index];
index--;
if ([current isString]) {
if ([current length] == 0) {
[symbols removeObjectAtIndex:index];
index--;
} else if ([next isString]) {
NSString *new = [NSString stringWithFormat:@"%@%@", current, next];
[symbols replaceObjectAtIndex:index withObject:new];
[symbols removeObjectAtIndex:index+1];
index--;
}
}
}
}
- (void)getSplitOffset:(out NSUInteger *)offset inSymbolAtIndex:(out NSUInteger *)symbolIndex forSplitLocation:(NSUInteger)loc
- (void)getSplitOffset:(out NSUInteger *)offset
inSymbolAtIndex:(out NSUInteger *)symbolIndex
forSplitLocation:(NSUInteger)loc
{
NSUInteger length = 0;
NSUInteger index = 0;
@@ -227,7 +238,9 @@ NSString *MPDivisionOperator = @"/";
- (MPExpression *)subexpressionWithRange:(NSRange)range
{
if (NSMaxRange(range) > self.length) {
@throw [NSException exceptionWithName:NSRangeException reason:@"Range outside bounds of expression." userInfo:nil];
@throw [NSException exceptionWithName:NSRangeException
reason:@"Range outside bounds of expression."
userInfo:nil];
}
if (range.location == self.length || NSMaxRange(range) == 0 || range.length == 0) {
// Speed this up
@@ -235,20 +248,24 @@ NSString *MPDivisionOperator = @"/";
}
NSUInteger startOffset;
NSUInteger startSymbolIndex;
[self getSplitOffset:&startOffset inSymbolAtIndex:&startSymbolIndex forSplitLocation:range.location];
[self getSplitOffset:&startOffset
inSymbolAtIndex:&startSymbolIndex
forSplitLocation:range.location];
id startSymbol = _symbols[startSymbolIndex];
if (startOffset == [self lengthOfSymbol:startSymbol]) {
startOffset = 0;
startSymbolIndex++;
startSymbol = _symbols[startSymbolIndex];
} else if ([startSymbol isKindOfClass:[NSString class]]) {
} else if ([startSymbol isString]) {
startSymbol = [startSymbol substringFromIndex:startOffset];
}
NSUInteger endOffset;
NSUInteger endSymbolIndex;
[self getSplitOffset:&endOffset inSymbolAtIndex:&endSymbolIndex forSplitLocation:NSMaxRange(range)];
[self getSplitOffset:&endOffset
inSymbolAtIndex:&endSymbolIndex
forSplitLocation:NSMaxRange(range)];
id endSymbol = _symbols[endSymbolIndex];
if ([endSymbol isKindOfClass:[NSString class]]) {
if ([endSymbol isString]) {
endSymbol = [endSymbol substringToIndex:endOffset];
}
@@ -261,9 +278,10 @@ NSString *MPDivisionOperator = @"/";
}
if (endSymbolIndex > startSymbolIndex) {
[symbols addObject:endSymbol];
} else if (endSymbolIndex == startSymbolIndex && [startSymbol isKindOfClass:[NSString class]]) {
} else if (endSymbolIndex == startSymbolIndex && [startSymbol isString]) {
NSString *result = [_symbols[startSymbolIndex] substringWithRange:NSMakeRange(startOffset, endOffset-startOffset)];
[symbols replaceObjectAtIndex:0 withObject:result];
[symbols replaceObjectAtIndex:0
withObject:result];
}
return [[MPExpression alloc] initWithSymbols:symbols];
}
@@ -343,13 +361,14 @@ NSString *MPDivisionOperator = @"/";
NSMutableString *description = [[NSMutableString alloc] init];
NSUInteger index = 0;
for (id symbol in _symbols) {
if ([symbol isKindOfClass:[NSString class]]) {
if ([symbol isString]) {
NSMutableString *correctedSymbol = [[symbol stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] mutableCopy];
// Prefix operator
if (symbol != _symbols[0]) {
unichar prefix = [correctedSymbol characterAtIndex:0];
if ([[NSCharacterSet decimalDigitCharacterSet] characterIsMember:prefix]) {
[correctedSymbol insertString:@"*" atIndex:0];
[correctedSymbol insertString:@"*"
atIndex:0];
}
}
// Suffix operator
@@ -385,7 +404,8 @@ NSString *MPDivisionOperator = @"/";
self = [super initWithSymbols:nil];
if (self) {
symbols = [self repairedSymbols:symbols];
_symbols = [[NSMutableArray alloc] initWithArray:symbols copyItems:YES];
_symbols = [[NSMutableArray alloc] initWithArray:symbols
copyItems:YES];
}
return self;
}
@@ -396,21 +416,26 @@ NSString *MPDivisionOperator = @"/";
return [_symbols copy];
}
- (void)replaceSymbolsInRange:(NSRange)range withSymbols:(NSArray *)symbols
- (void)replaceSymbolsInRange:(NSRange)range
withSymbols:(NSArray *)symbols
{
if (NSMaxRange(range) > self.length) {
@throw [NSException exceptionWithName:NSRangeException reason:@"Range out of bounds of expression." userInfo:nil];
@throw [NSException exceptionWithName:NSRangeException
reason:@"Range out of bounds of expression."
userInfo:nil];
}
[self validateSymbols:symbols];
// Locate the position, split the symbols
NSUInteger startIndex;
[self splitSymbolsAtLocation:range.location insertionIndex:&startIndex];
[self splitSymbolsAtLocation:range.location
insertionIndex:&startIndex];
// Perform the deletion
if (range.length > 0) {
NSUInteger endIndex;
[self splitSymbolsAtLocation:NSMaxRange(range) insertionIndex:&endIndex];
[self splitSymbolsAtLocation:NSMaxRange(range)
insertionIndex:&endIndex];
NSMutableIndexSet *indexes = [[NSMutableIndexSet alloc] init];
for (NSUInteger index = startIndex; index < endIndex; index++) {
[indexes addIndex:index];
@@ -421,7 +446,8 @@ NSString *MPDivisionOperator = @"/";
// Perform the insertion
if (symbols.count > 0) {
NSArray *newSymbols = [[NSArray alloc] initWithArray:symbols copyItems:YES];
[(NSMutableArray *)_symbols replaceObjectsInRange:NSMakeRange(startIndex, 0) withObjectsFromArray:newSymbols];
[(NSMutableArray *)_symbols replaceObjectsInRange:NSMakeRange(startIndex, 0)
withObjectsFromArray:newSymbols];
}
// Revalidate structure and invalidate length
@@ -429,11 +455,14 @@ NSString *MPDivisionOperator = @"/";
_length = 0;
}
- (void)splitSymbolsAtLocation:(NSUInteger)loc insertionIndex:(out NSUInteger *)insertionIndex
- (void)splitSymbolsAtLocation:(NSUInteger)loc
insertionIndex:(out NSUInteger *)insertionIndex
{
NSUInteger splitSymbolIndex;
NSUInteger splitOffset;
[self getSplitOffset:&splitOffset inSymbolAtIndex:&splitSymbolIndex forSplitLocation:loc];
[self getSplitOffset:&splitOffset
inSymbolAtIndex:&splitSymbolIndex
forSplitLocation:loc];
id splitSymbol = _symbols[splitSymbolIndex];
NSInteger splitSymbolLength = [self lengthOfSymbol:splitSymbol];
if (splitOffset == splitSymbolLength) {
@@ -443,9 +472,11 @@ NSString *MPDivisionOperator = @"/";
if (splitOffset != 0) {
NSString *leftPart = [splitSymbol substringToIndex:splitOffset];
NSString *rightPart = [splitSymbol substringFromIndex:splitOffset];
[(NSMutableArray *)_symbols replaceObjectAtIndex:splitSymbolIndex withObject:leftPart];
[(NSMutableArray *)_symbols replaceObjectAtIndex:splitSymbolIndex
withObject:leftPart];
splitSymbolIndex++;
[(NSMutableArray *)_symbols insertObject:rightPart atIndex:splitSymbolIndex];
[(NSMutableArray *)_symbols insertObject:rightPart
atIndex:splitSymbolIndex];
}
*insertionIndex = splitSymbolIndex;
}
@@ -454,22 +485,29 @@ NSString *MPDivisionOperator = @"/";
@implementation MPMutableExpression (MPMutableExpressionExtensionMethods)
- (void)insertString:(NSString *)aString atIndex:(NSUInteger)loc
- (void)insertString:(NSString *)aString
atIndex:(NSUInteger)loc
{
[self insertSymbols:@[aString] atIndex:loc];
[self insertSymbols:@[aString]
atIndex:loc];
}
- (void)insertFunction:(MPFunction *)aFunction atIndex:(NSUInteger)loc
- (void)insertFunction:(MPFunction *)aFunction
atIndex:(NSUInteger)loc
{
[self insertSymbols:@[aFunction] atIndex:loc];
[self insertSymbols:@[aFunction]
atIndex:loc];
}
- (void)insertExpression:(MPExpression *)anExpression atIndex:(NSUInteger)loc
- (void)insertExpression:(MPExpression *)anExpression
atIndex:(NSUInteger)loc
{
[self insertSymbols:anExpression.symbols atIndex:loc];
[self insertSymbols:anExpression.symbols
atIndex:loc];
}
- (void)insertSymbols:(NSArray *)symbols atIndex:(NSUInteger)loc
- (void)insertSymbols:(NSArray *)symbols
atIndex:(NSUInteger)loc
{
[self replaceSymbolsInRange:NSMakeRange(loc, 0)
withSymbols:symbols];