codello/mathpad
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Fixed broken editing algorithm

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Added some helpers
This commit is contained in:
Kim Wittenburg
2014-09-28 23:49:15 +02:00
parent 9a8893796c
commit 43b6f78afb
2 changed files with 39 additions and 8 deletions
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3
MathPad/MPExpression.h
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@@ -603,6 +603,9 @@
- (void)replaceElementsInIndexedRange:(NSRange)range
withElements:(NSArray *)elements;
- (void)replaceSymbolsInRangePath:(MPRangePath *)rangePath
withElements:(NSArray *)elements;
/*!
@method appendElement:

44
MathPad/MPExpression.m
View File

@@ -91,7 +91,9 @@
@implementation MPExpression {
NSUInteger _cachedLength;
NSRange _editedRange;
BOOL _didSplitStartOnEditing;
BOOL _didSplitEndOnEditing;
NSUInteger _replacementLength;
}
@@ -144,15 +146,17 @@
[_elements replaceObjectsInRange:NSMakeRange(index, 2)
withObjectsFromArray:@[new]];
NSUInteger maxReplacementIndex = _editedRange.location + _replacementLength;
if (index == _editedRange.location - 1) {
if (index == _editedRange.location-1 && !_didSplitStartOnEditing) {
--_editedRange.location;
++_editedRange.length;
if (index == maxReplacementIndex-1 && !_didSplitEndOnEditing) {
++_editedRange.length;
++_replacementLength;
}
} else if (index >= _editedRange.location && index < maxReplacementIndex - 1) {
--_replacementLength;
} else if (index == maxReplacementIndex - 1) {
if (!_didSplitEndOnEditing) {
++_editedRange.length;
}
} else if (index == maxReplacementIndex-1 && !_didSplitEndOnEditing) {
++_editedRange.length;
}
--index;
}
@@ -222,12 +226,28 @@
_cachedLength = 0;
NSUInteger editLocation = startIndex - (didSplitStart ? 1 : 0);
NSUInteger editLength = range.length > 0 ? (endIndex - startIndex) : 0;
NSUInteger editLength = endIndex - startIndex;
if (range.length == 0 && didSplitStart) {
editLength = 1;
}
_editedRange = NSMakeRange(editLocation, editLength);
_didSplitStartOnEditing = didSplitStart;
_didSplitEndOnEditing = didSplitEnd;
_replacementLength = elements.count + (didSplitStart ? 1 : 0) + (didSplitEnd ? 1 : 0);
_replacementLength = elements.count;
if (didSplitStart) {
_replacementLength++;
if (range.length == 0) {
_replacementLength++;
}
}
if (didSplitEnd) {
_replacementLength++;
}
[self fixElements];
[self.evaluator expressionDidChangeInRange:_editedRange
replacementLength:_replacementLength];
[self didChangeElementsInIndexedRangePath:[[MPRangePath alloc] initWithRange:_editedRange]
replacementLength:_replacementLength];
}
@@ -546,6 +566,14 @@
withElements:elements];
}
- (void)replaceSymbolsInRangePath:(MPRangePath *)rangePath
withElements:(NSArray *)elements
{
MPExpression *targetExpression = [self elementAtIndexPath:[rangePath.location indexPathByRemovingLastIndex]];
[targetExpression replaceSymbolsInRange:rangePath.rangeAtLastIndex
withElements:elements];
}
- (void)appendElement:(id<MPExpressionElement>)anElement
{
[self appendElements:@[anElement]];