[322] | 1 | //
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| 2 | // ICeCoffEEParser.m
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| 3 | // ICeCoffEE
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| 4 | //
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| 5 | // Created by Nicholas Riley on 6/21/07.
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| 6 | // Copyright 2007 Nicholas Riley. All rights reserved.
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| 7 | //
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| 8 |
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| 9 | #import "ICeCoffEEParser.h"
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| 10 | #import "ICeCoffEE.h"
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| 11 |
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| 12 | void ICCF_Delimiters(NSCharacterSet **leftPtr, NSCharacterSet **rightPtr) {
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| 13 | static NSCharacterSet *urlLeftDelimiters = nil, *urlRightDelimiters = nil;
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| 14 |
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| 15 | if (urlLeftDelimiters == nil || urlRightDelimiters == nil) {
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| 16 | NSMutableCharacterSet *set = [[NSCharacterSet whitespaceAndNewlineCharacterSet] mutableCopy];
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| 17 | NSMutableCharacterSet *tmpSet;
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| 18 | [urlLeftDelimiters release];
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| 19 | [urlRightDelimiters release];
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| 20 |
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| 21 | [set autorelease];
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| 22 | [set formUnionWithCharacterSet: [[NSCharacterSet characterSetWithRange: NSMakeRange(0x21, 0x5e)] invertedSet]]; // nonprintable and non-ASCII characters
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| 23 | [set formUnionWithCharacterSet: [NSCharacterSet punctuationCharacterSet]];
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| 24 | // XXX obsoleted by RFC 3986 now... use §2.1, 2.2, 2.3
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[383] | 25 | [set removeCharactersInString: @";/?:@&=+$,-_.!~*'(){}[]%#"]; // RFC 2396 §2.2, 2.3, 2.4, plus % and # from "delims" set and {}, []
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[322] | 26 |
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| 27 | tmpSet = [[set mutableCopy] autorelease];
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[384] | 28 | [tmpSet formUnionWithCharacterSet: [NSCharacterSet characterSetWithCharactersInString: @"<(["]];
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[322] | 29 | urlLeftDelimiters = [tmpSet copy]; // make immutable again - for efficiency
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| 30 |
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| 31 | tmpSet = [[set mutableCopy] autorelease];
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[384] | 32 | [tmpSet formUnionWithCharacterSet: [NSCharacterSet characterSetWithCharactersInString: @">)]"]];
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[322] | 33 | urlRightDelimiters = [tmpSet copy]; // make immutable again - for efficiency
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| 34 | }
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| 35 |
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| 36 | *leftPtr = urlLeftDelimiters; *rightPtr = urlRightDelimiters;
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| 37 | }
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| 38 |
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| 39 | static ICInstance ICCF_icInst = NULL;
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| 40 |
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| 41 | void ICCF_StartIC() {
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| 42 | OSStatus err;
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| 43 |
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| 44 | if (ICCF_icInst != NULL) {
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| 45 | ICLog(@"ICCF_StartIC: Internet Config is already running!");
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| 46 | ICCF_StopIC();
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| 47 | }
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| 48 | err = ICStart(&ICCF_icInst, kICCFCreator);
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| 49 | NSCAssert1(err == noErr, ICCF_LocalizedString(@"Unable to start Internet Config (error %d)"), err);
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| 50 | }
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| 51 |
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| 52 | void ICCF_StopIC() {
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| 53 | if (ICCF_icInst == NULL) {
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| 54 | ICLog(@"ICCF_StopIC: Internet Config is not running!");
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| 55 | } else {
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| 56 | ICStop(ICCF_icInst);
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| 57 | ICCF_icInst = NULL;
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| 58 | }
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| 59 | }
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| 60 |
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| 61 | ICInstance ICCF_GetInst() {
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| 62 | NSCAssert(ICCF_icInst != NULL, @"Internal error: Called ICCF_GetInst without ICCF_StartIC");
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| 63 | return ICCF_icInst;
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| 64 | }
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| 65 |
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| 66 | // input/output 'range' is the range of source document which contains 'string'
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| 67 | void ICCF_ParseURL(NSString *string, NSRange *range) {
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| 68 | OSStatus err;
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| 69 | Handle h;
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| 70 | long selStart = 0, selEnd = range->length; // local offsets within 'string'
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| 71 | char *urlData = NULL;
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| 72 |
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| 73 | NSCAssert(selEnd == [string length], @"Internal error: URL string is wrong length");
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| 74 |
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[436] | 75 | @try {
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[322] | 76 | if ([[NSCharacterSet characterSetWithCharactersInString: @";,."] characterIsMember:
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| 77 | [string characterAtIndex: selEnd - 1]]) {
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| 78 | selEnd--;
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| 79 | }
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| 80 | NSCharacterSet *alphanumericCharacterSet = [NSCharacterSet alphanumericCharacterSet];
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| 81 | while (![alphanumericCharacterSet characterIsMember: [string characterAtIndex: selStart]]) {
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| 82 | selStart++;
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| 83 | NSCAssert(selStart < selEnd, @"No URL is selected");
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| 84 | }
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| 85 |
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| 86 | string = [string substringWithRange: NSMakeRange(selStart, selEnd - selStart)];
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| 87 |
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| 88 | ICLog(@"Parsing URL |%@|", string);
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| 89 |
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| 90 | NSCAssert([string canBeConvertedToEncoding: NSASCIIStringEncoding], @"No URL is selected");
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| 91 |
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| 92 | urlData = (char *)malloc( (range->length + 1) * sizeof(char));
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| 93 | NSCAssert(urlData != NULL, @"Internal error: can't allocate memory for URL string");
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| 94 |
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| 95 | // XXX getCString: is deprecated in 10.4, but this is safe and shouldn't assert because we've already verified the string can be converted to ASCII, which should be a subset of any possible system encoding. The replacement (getCString:maxLength:encoding:) is not available until 10.4, so we leave this until we dump Internet Config and gain IDN friendliness.
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| 96 | [string getCString: urlData];
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| 97 |
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| 98 | h = NewHandle(0);
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| 99 | NSCAssert(h != NULL, @"Internal error: can't allocate URL handle");
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| 100 |
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| 101 | err = ICParseURL(ICCF_GetInst(), "\pmailto", urlData, range->length, &selStart, &selEnd, h);
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| 102 | DisposeHandle(h);
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| 103 |
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| 104 | ICCF_OSErrCAssert(err, @"ICParseURL");
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| 105 |
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| 106 | range->length = selEnd - selStart;
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| 107 | range->location += selStart;
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[436] | 108 | } @finally {
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[322] | 109 | free(urlData);
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[436] | 110 | }
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[322] | 111 | }
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| 112 |
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[383] | 113 | static BOOL ICCF_StringIncludesCharacter(NSString *s, unichar character, NSRange range) {
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[388] | 114 | NSRange result = [s rangeOfCharacterFromSet: [NSCharacterSet characterSetWithCharactersInString:
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[383] | 115 | [NSString stringWithCharacters: &character length: 1]]
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[388] | 116 | options: NSLiteralSearch range: range];
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| 117 | return (result.location != NSNotFound);
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[383] | 118 | }
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| 119 |
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| 120 | static BOOL ICCF_IsLikelyURI(NSString *s, NSRange range) {
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| 121 | return ([s rangeOfCharacterFromSet: [NSCharacterSet characterSetWithCharactersInString: @":/.@"]
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| 122 | options: NSLiteralSearch range: range].location != NSNotFound);
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| 123 | }
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| 124 |
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| 125 | static BOOL ICCF_IsLikelyIPv6Address(NSString *s, NSRange range) {
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| 126 | return ([s rangeOfCharacterFromSet:
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| 127 | [[NSCharacterSet characterSetWithCharactersInString: @"ABCDEFabcdef0123456789:"] invertedSet]
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| 128 | options: NSLiteralSearch range: range].location == NSNotFound);
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| 129 | }
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| 130 |
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[322] | 131 | NSRange ICCF_URLEnclosingRange(NSString *s, NSRange range) {
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| 132 | NSCharacterSet *urlLeftDelimiters = nil, *urlRightDelimiters = nil;
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| 133 | NSRange delimiterRange;
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| 134 | unsigned extraLen;
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[388] | 135 | BOOL multiLine = NO;
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[322] | 136 |
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| 137 | ICCF_CheckRange(range);
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| 138 |
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| 139 | ICCF_Delimiters(&urlLeftDelimiters, &urlRightDelimiters);
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| 140 |
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[383] | 141 | // right delimiter selected? Yes, this can break with ...)URL(.... Oh well.
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| 142 | if (range.location > 0 && [urlRightDelimiters characterIsMember: [s characterAtIndex: range.location]]) {
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| 143 | --range.location;
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| 144 | ++range.length;
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| 145 | ICLog(@"expanding past initial %c, now |%@|", [s characterAtIndex: range.location + 1],
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| 146 | [s substringWithRange: range]);
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| 147 | }
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| 148 |
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[322] | 149 | expandFront:
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[375] | 150 | // XXX instead of 0, make this stop at the max URL length to prevent protracted searches
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[383] | 151 | // XXX backport to ICeCoffEETerminal
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[375] | 152 | // add 1 to range to trap delimiters that are on the edge of the selection (i.e., <...)
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| 153 | delimiterRange = [s rangeOfCharacterFromSet: urlLeftDelimiters
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| 154 | options: NSLiteralSearch | NSBackwardsSearch
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| 155 | range: NSMakeRange(0, range.location + (range.location != [s length]))];
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[322] | 156 | if (delimiterRange.location == NSNotFound) {
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| 157 | // extend to beginning of string
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| 158 | range.length += range.location;
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| 159 | range.location = 0;
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| 160 | } else {
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| 161 | NSCAssert(delimiterRange.length == 1, @"Internal error: delimiter matched range is not of length 1");
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[388] | 162 | if ([s characterAtIndex: delimiterRange.location] == '<') { // XXX move to expandBoth to handle clicking in middle
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| 163 | multiLine = YES;
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| 164 | urlRightDelimiters = [NSCharacterSet characterSetWithCharactersInString: @">"];
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| 165 | }
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[322] | 166 | range.length += range.location - delimiterRange.location - 1;
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| 167 | range.location = delimiterRange.location + 1;
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| 168 | }
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| 169 |
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[388] | 170 |
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[322] | 171 | expandBack:
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[375] | 172 | // XXX instead of length of string, make this stop at the max URL length to prevent protracted searches
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| 173 | // add 1 to range to trap delimiters that are on the edge of the selection (i.e., ...>)
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| 174 | extraLen = [s length] - range.location - range.length;
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[322] | 175 | delimiterRange = [s rangeOfCharacterFromSet: urlRightDelimiters
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| 176 | options: NSLiteralSearch
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| 177 | range: NSMakeRange(range.location + range.length - (range.length != 0),
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| 178 | extraLen + (range.length != 0))];
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| 179 | if (delimiterRange.location == NSNotFound) {
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| 180 | // extend to end of string
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| 181 | range.length += extraLen;
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[383] | 182 | extraLen = 0;
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[322] | 183 | } else {
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| 184 | NSCAssert(delimiterRange.length == 1, @"Internal error: delimiter matched range is not of length 1");
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| 185 | range.length += delimiterRange.location - range.location - range.length;
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[383] | 186 | extraLen = [s length] - NSMaxRange(range);
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| 187 |
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[388] | 188 | unichar opening, closing = [s characterAtIndex: delimiterRange.location];
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| 189 | if (closing == '>' && !multiLine && ICCF_StringIncludesCharacter(s, '<', NSMakeRange(0, range.location))) {
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| 190 | urlLeftDelimiters = [NSCharacterSet characterSetWithCharactersInString: @"<"];
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| 191 | goto expandFront; // XXX move to expandBoth to handle clicking in middle
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| 192 | }
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[383] | 193 | // grow URL past closing paren/brace/bracket if we've seen an open paren/brace/bracket
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| 194 | if (closing == ')') opening = '(';
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| 195 | else if (closing == '}') opening = '{';
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| 196 | else if (closing == ']') opening = '[';
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| 197 | else goto expandBoth;
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| 198 | if (!ICCF_StringIncludesCharacter(s, opening, range))
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| 199 | goto expandBoth;
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[322] | 200 |
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[383] | 201 | if (extraLen == 1) {
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[375] | 202 | range.length += 1;
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[383] | 203 | --extraLen;
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[375] | 204 | ICLog(@"expanding past %c, now |%@|", closing, [s substringWithRange: range]);
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| 205 | } else {
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[322] | 206 | range.length += 2;
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[375] | 207 | ICLog(@"expanding past %c, now |%@|", closing, [s substringWithRange: range]);
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[322] | 208 | goto expandBack;
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| 209 | }
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| 210 | }
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| 211 |
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[383] | 212 | expandBoth:
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| 213 | if (range.location <= 1)
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| 214 | goto checkRange; // nowhere to expand
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| 215 | unichar opening = [s characterAtIndex: range.location - 1], closing;
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| 216 | if (opening == '(') closing = ')';
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| 217 | else if (opening == '{') closing = '}';
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| 218 | else if (opening == '[') closing = ']';
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| 219 | else goto checkRange;
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| 220 |
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| 221 | ICLog(@"extraLen = %d", extraLen);
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| 222 | // check if we're inside a partial delimited URL: not foolproof, but handles (foo), {UUID} and [IPv6]
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| 223 | if (delimiterRange.location != NSNotFound && [s characterAtIndex: delimiterRange.location] == closing &&
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| 224 | ((opening == '[' && ICCF_IsLikelyIPv6Address(s, range)) || !ICCF_IsLikelyURI(s, range))) {
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| 225 | ICLog(@"expanding past %c...%c, was |%@|", opening, closing, [s substringWithRange: range]);
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| 226 | range.location -= 2;
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| 227 | if (extraLen > 1)
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| 228 | range.length += 4;
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| 229 | else
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| 230 | range.length += 2 + extraLen;
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| 231 | ICLog(@"expanding past %c...%c, now |%@|", opening, closing, [s substringWithRange: range]);
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| 232 | goto expandFront;
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| 233 | }
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| 234 |
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| 235 | if (ICCF_StringIncludesCharacter(s, closing, range) &&
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| 236 | ((opening == '[' &&
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| 237 | ICCF_IsLikelyIPv6Address(s, NSMakeRange(range.location,
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| 238 | [s rangeOfString: @"]"].location - range.location)))
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| 239 | || !ICCF_IsLikelyURI(s, range))) {
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| 240 | range.location -= 2;
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| 241 | range.length += 2;
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| 242 | ICLog(@"expanding past %c, now |%@|", opening, [s substringWithRange: range]);
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| 243 | goto expandFront;
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| 244 | }
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| 245 |
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[375] | 246 | checkRange:
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[322] | 247 | ICCF_CheckRange(range);
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| 248 |
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| 249 | ICCF_ParseURL([s substringWithRange: range], &range);
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| 250 |
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| 251 | return range;
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| 252 | } |
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