Curtis Hard
122 lines
3.9 KiB
Objective-C
122 lines
3.9 KiB
Objective-C
//
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// IJSVGWriter.m
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// IJSVGExample
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//
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// Created by Curtis Hard on 21/05/2015.
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// Copyright (c) 2015 Curtis Hard. All rights reserved.
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//
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#import "IJSVGWriter.h"
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@implementation IJSVGWriter
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+ (NSString *)SVGDocumentStringForSVGGlyph:(IJSVGPath *)node
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{
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NSBezierPath * path = [node path];
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// we need to flip it
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NSAffineTransform * trans = [NSAffineTransform transform];
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[trans scaleXBy:1.f yBy:-1.f];
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[trans translateXBy:0.f yBy:path.controlPointBounds.size.height];
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path = [trans transformBezierPath:path];
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return [self.class SVGDocumentStringForBezierPath:path];
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}
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+ (NSString *)SVGDocumentStringForBezierPath:(NSBezierPath *)path
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{
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return [self.class SVGDocumentForBezierPath:path].XMLString;
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}
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+ (NSXMLDocument *)SVGDocumentForBezierPath:(NSBezierPath *)path
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{
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NSXMLElement * root = [self.class rootElementForPath:path];
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// create the path data
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NSXMLElement * p = [[[NSXMLElement alloc] initWithName:@"path"] autorelease];
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// add the drawing command
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NSXMLNode * n = [[[NSXMLNode alloc] initWithKind:NSXMLAttributeKind] autorelease];
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[n setName:@"d"];
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[n setStringValue:[self.class SVGPathStringForBezierPath:path]];
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[p addAttribute:n];
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// add the drawing path to the root
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[root addChild:p];
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return [[[NSXMLDocument alloc] initWithRootElement:root] autorelease];
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}
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+ (NSXMLElement *)rootElementForPath:(NSBezierPath *)path
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{
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NSXMLElement * element = [[[NSXMLElement alloc] initWithName:@"svg"] autorelease];
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NSRect bounds = path.controlPointBounds;
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// width
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NSXMLNode * att = [[[NSXMLNode alloc] initWithKind:NSXMLAttributeKind] autorelease];
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[att setName:@"width"];
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[att setStringValue:[NSString stringWithFormat:@"%f",bounds.size.width]];
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[element addAttribute:att];
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// height
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att = [[[NSXMLNode alloc] initWithKind:NSXMLAttributeKind] autorelease];
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[att setName:@"height"];
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[att setStringValue:[NSString stringWithFormat:@"%f",bounds.size.height]];
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[element addAttribute:att];
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// viewbox
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att = [[[NSXMLNode alloc] initWithKind:NSXMLAttributeKind] autorelease];
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[att setName:@"viewBox"];
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[att setStringValue:[NSString stringWithFormat:@"%f %f %f %f",bounds.origin.x,bounds.origin.y,bounds.size.width,bounds.size.height]];
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[element addAttribute:att];
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// namespace
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att = [[[NSXMLNode alloc] initWithKind:NSXMLAttributeKind] autorelease];
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[att setName:@"xmlns"];
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[att setStringValue:@"http://www.w3.org/2000/svg"];
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[element addAttribute:att];
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return element;
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}
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+ (NSString *)SVGPathStringForBezierPath:(NSBezierPath *)path
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{
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NSMutableString * str = [[[NSMutableString alloc] init] autorelease];
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for( NSInteger i = 0; i < path.elementCount; i++ )
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{
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NSBezierPathElement element = [path elementAtIndex:i];
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switch( element )
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{
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// move
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case NSMoveToBezierPathElement:
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{
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NSPoint points[1];
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[path elementAtIndex:i associatedPoints:points];
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[str appendFormat:@"M%f %f",points[0].x,points[0].y];
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break;
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}
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// line
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case NSLineToBezierPathElement:
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{
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NSPoint points[1];
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[path elementAtIndex:i associatedPoints:points];
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[str appendFormat:@"L%f %f",points[0].x,points[0].y];
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break;
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}
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// curve
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case NSCurveToBezierPathElement:
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{
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NSPoint points[3];
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[path elementAtIndex:i associatedPoints:points];
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[str appendFormat:@"C%f %f %f %f %f %f",points[0].x,points[0].y,points[1].x,points[1].y,points[2].x,points[2].y];
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break;
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}
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// close
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case NSClosePathBezierPathElement:
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{
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[str appendFormat:@"Z"];
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break;
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}
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}
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}
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return str;
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}
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@end
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