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* NSAttributedString.m and NSAttributedString.h remove.

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* NSStringDrawing.m and NSStringDrawing.h add NSAttributedString interface
	and implementation.  Implement NSAttributedString's size method and
	optimize tab width calculation.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@3352 72102866-910b-0410-8b05-ffd578937521
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far 1998-11-30 09:40:01 +00:00
parent 2bec406f7f
commit b77483cabe
13 changed files with 87 additions and 187 deletions
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76
Source/NSStringDrawing.m
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@ -1,7 +1,8 @@
/*
NSStringDrawing.m
Category which adds measure capabilities to NSString.
Categories which add measure capabilities to NSAttributedString
and NSString.
Copyright (C) 1997 Free Software Foundation, Inc.
@ -28,37 +29,72 @@
#include <AppKit/NSStringDrawing.h>
#include <AppKit/AppKit.h>
// by default tabs are measured as one
#define TABWIDTH 3 // char so this value is set to one
// minus the default tab width of 4
@implementation NSString(NSStringDrawing)
@implementation NSString (NSStringDrawing)
- (NSSize)sizeWithAttributes:(NSDictionary *)attrs
{
NSFont *font;
const char *str = [self cString];
int i = 0, j = 4;
float tabSize;
int i = 0, j = TABWIDTH;
static float tabSize;
static float pointSize;
static NSFont *lastFont = nil;
while(*str++ != '\0') // count the tabs
{
if(*str == '\t')
{
i += j;
j = 4;
}
else
j = j == 0 ? 4 : j--;
};
while(*str != '\0') // calc the additional size
{ // to be added for tabs.
if(*str++ == '\t')
{ // j is initialized to the
i += j; // max number of spaces
j = TABWIDTH; // needed per tab. it then
} // varies in order to align
else // tabs to even multiples
j = j-- > 0 ? j : TABWIDTH; // of TABWIDTH + 1.
};
// if font is not
if(!(font = [attrs objectForKey:NSFontAttributeName])) // specified, use
font = [NSFont userFontOfSize:12]; // the default
fprintf(stderr,"string %s width: %f\n", [self cString], [font widthOfString:self]);
// tabSize = 4 * i * [font widthOfString:@" "];
tabSize = (float)i * [font widthOfString:@" "];
if(font != lastFont) // update font info
{ // if font changes
tabSize = (float)i * [font widthOfString:@"\t"];
lastFont = font;
pointSize = [font pointSize];
}
return NSMakeSize(([font widthOfString:self] + tabSize), [font pointSize]);
return NSMakeSize(([font widthOfString:self] + tabSize), pointSize);
}
@end
@implementation NSAttributedString (NSStringDrawing)
- (NSSize)size // this method is
{ // untested FIX ME
NSFont *font;
unsigned int length;
NSRange effectiveRange;
NSString *subString;
float pointSize;
float sumOfCharacterRange = 0;
length = [self length];
effectiveRange = NSMakeRange(0, 0);
while (NSMaxRange(effectiveRange) < length)
{
font = (NSFont*)[self attribute:NSFontAttributeName
atIndex:NSMaxRange(effectiveRange)
effectiveRange:&effectiveRange];
subString = [self substringFromRange:effectiveRange];
sumOfCharacterRange += [font widthOfString:subString];
pointSize = MAX([font pointSize], pointSize);
}
return NSMakeSize(sumOfCharacterRange, pointSize);
}
@end