123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
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/**
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SVGKParser.h
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The main parser for SVGKit. All the magic starts here. Either use:
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A: +parseSourceUsingDefaultSVGKParser
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...or use:
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B: 1. -initWithSource:
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B: 2. -addDefaultSVGParserExtensions
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B: ...
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B: 3. (as many times as you need) -addParserExtension:
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B: ...
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B: 4. -parseSynchronously
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Note that "A" above does ALL the steps in B for you. If you need a custom set of Parser Extensions, you'll need to
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do all the steps in B yourself
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PARSING
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---
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Actual parsing of an SVG is split into three places:
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1. High level, XML parsing: this file (SVGKParser)
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2. Mid level, parsing the structure of a document, and special XML tags: any class that extends "SVGKParserExtension"
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3. Mid level, parsing SVG tags only: SVGKParserSVG (it's an extension that just does base SVG)
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4. Low level, parsing individual tags within a file, and precise co-ordinates: all the "SVG...Element" classes parse themselves
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IDEALLY, we'd like to change that to:
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1. High level, XML parsing: this file (SVGKParser)
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2. Mid level, parsing the structure of a document, and special XML tags: any class that extends "SVGKParserExtension"
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3. Mid level, parsing SVG tags only, but also handling all the different tags: SVGKParserSVG
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4. Lowest level, parsing co-ordinate lists, numbers, strings: yacc/lex parser (in an unnamed class that hasn't been written yet)
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*/
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#import <Foundation/Foundation.h>
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#import "SVGKSource.h"
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#import "SVGKParserExtension.h"
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#import "SVGKParseResult.h"
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#import "SVGElement.h"
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/*! RECOMMENDED: leave this set to 1 to get warnings about "legal, but poorly written" SVG */
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#define PARSER_WARN_FOR_ANONYMOUS_SVG_G_TAGS 1
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/*! Verbose parser logging - ONLY needed if you have an SVG file that's failing to load / crashing */
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#define DEBUG_VERBOSE_LOG_EVERY_TAG 0
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#define DEBUG_XML_PARSER 0
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@interface SVGKParser : NSObject {
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@private
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NSMutableString *_storedChars;
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//NSMutableArray *_elementStack;
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NSMutableArray * _stackOfParserExtensions;
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Node * _parentOfCurrentNode;
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}
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@property(nonatomic,strong,readonly) SVGKSource* source;
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@property(nonatomic,strong,readonly) NSMutableArray* externalStylesheets;
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@property(nonatomic,strong,readonly) SVGKParseResult* currentParseRun;
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@property(nonatomic,strong) NSMutableArray* parserExtensions;
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@property(nonatomic,strong) NSMutableDictionary* parserKnownNamespaces; /**< maps "uri" to "array of parser-extensions" */
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#pragma mark - NEW
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/**
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If you kept the SVGKParser instance when you started a parse, you can
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hand that instance to another thread and the OTHER thread can trigger
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a cancel.
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It is not instantaneous, but kicks in as soon as more data is read from
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the raw bytes-stream, so it's pretty quick
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*/
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+(void) cancelParser:(SVGKParser*) parserToCancel;
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/**
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Creates an SVGKParser, and adds the "standard" extensions for parsing
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a standard SVG file; you can then add any of your own custom extensions
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before triggering the parse with e.g. "parseSynchronously"
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*/
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+(SVGKParser *) newParserWithDefaultSVGKParserExtensions:(SVGKSource *)source;
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/**
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Delegates to [self newParserWithDefaultSVGKParserExtensions:], and then auto-starts
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the parse SYNCHRONOUSLY (may take anything from 0.001 seconds up to 30+ seconds
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for a huge SVG file).
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Returns the fully-parsed result, including any errors
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*/
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+ (SVGKParseResult*) parseSourceUsingDefaultSVGKParser:(SVGKSource*) source;
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/**
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This MIGHT now be safe to call multiple times on different threads
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(NB: the only reason it wasn't safe before was major bugs in libxml
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that break libxml in horrible ways, see the source code to this class
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for more info)
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*/
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- (SVGKParseResult*) parseSynchronously;
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+(NSDictionary *) NSDictionaryFromCSSAttributes: (Attr*) styleAttribute;
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#pragma mark - OLD - POTENTIALLY DELETE THESE ONCE THEY'VE ALL BEEN CHECKED AND CONVERTED
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- (id)initWithSource:(SVGKSource *)doc;
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/*! Adds the default SVG-tag parsers (everything in the SVG namespace); you should always use these, unless you
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are massively customizing SVGKit's parser! */
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-(void) addDefaultSVGParserExtensions;
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/*! NB: you ALMOST ALWAYS want to first call "addDefaultSVGParserExtensions" */
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- (void) addParserExtension:(NSObject<SVGKParserExtension>*) extension;
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@end
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