[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 | // RFC-ordained max URL length, just to avoid passing IC/LS multi-megabyte documents
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| 13 | #if ICCF_DEBUG
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| 14 | const long ICCF_MAX_URL_LEN = 120; // XXX change later
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| 15 | #else
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| 16 | const long ICCF_MAX_URL_LEN = 1024;
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| 17 | #endif
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| 18 |
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| 19 | void ICCF_CheckRange(NSRange range) {
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| 20 | NSCAssert(range.length > 0, ICCF_LocalizedString(@"No URL is selected"));
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| 21 | NSCAssert1(range.length <= ICCF_MAX_URL_LEN, ICCF_LocalizedString(@"The potential URL is longer than %lu characters"), ICCF_MAX_URL_LEN);
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| 22 | }
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| 23 |
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| 24 | void ICCF_Delimiters(NSCharacterSet **leftPtr, NSCharacterSet **rightPtr) {
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| 25 | static NSCharacterSet *urlLeftDelimiters = nil, *urlRightDelimiters = nil;
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| 26 |
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| 27 | if (urlLeftDelimiters == nil || urlRightDelimiters == nil) {
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| 28 | NSMutableCharacterSet *set = [[NSCharacterSet whitespaceAndNewlineCharacterSet] mutableCopy];
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| 29 | NSMutableCharacterSet *tmpSet;
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| 30 | [urlLeftDelimiters release];
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| 31 | [urlRightDelimiters release];
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| 32 |
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| 33 | [set autorelease];
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| 34 | [set formUnionWithCharacterSet: [[NSCharacterSet characterSetWithRange: NSMakeRange(0x21, 0x5e)] invertedSet]]; // nonprintable and non-ASCII characters
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| 35 | [set formUnionWithCharacterSet: [NSCharacterSet punctuationCharacterSet]];
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| 36 | // XXX obsoleted by RFC 3986 now... use §2.1, 2.2, 2.3
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| 37 | [set removeCharactersInString: @";/?:@&=+$,-_.!~*'()%#"]; // RFC 2396 §2.2, 2.3, 2.4, plus % and # from "delims" set
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| 38 |
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| 39 | tmpSet = [[set mutableCopy] autorelease];
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| 40 | [tmpSet formUnionWithCharacterSet: [NSCharacterSet characterSetWithCharactersInString: @"><("]];
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| 41 | urlLeftDelimiters = [tmpSet copy]; // make immutable again - for efficiency
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| 42 |
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| 43 | tmpSet = [[set mutableCopy] autorelease];
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| 44 | [tmpSet formUnionWithCharacterSet: [NSCharacterSet characterSetWithCharactersInString: @"><)"]];
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| 45 | urlRightDelimiters = [tmpSet copy]; // make immutable again - for efficiency
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| 46 | }
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| 47 |
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| 48 | *leftPtr = urlLeftDelimiters; *rightPtr = urlRightDelimiters;
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| 49 | }
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| 50 |
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| 51 | static ICInstance ICCF_icInst = NULL;
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| 52 |
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| 53 | void ICCF_StartIC() {
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| 54 | OSStatus err;
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| 55 |
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| 56 | if (ICCF_icInst != NULL) {
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| 57 | ICLog(@"ICCF_StartIC: Internet Config is already running!");
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| 58 | ICCF_StopIC();
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| 59 | }
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| 60 | err = ICStart(&ICCF_icInst, kICCFCreator);
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| 61 | NSCAssert1(err == noErr, ICCF_LocalizedString(@"Unable to start Internet Config (error %d)"), err);
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| 62 | }
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| 63 |
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| 64 | void ICCF_StopIC() {
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| 65 | if (ICCF_icInst == NULL) {
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| 66 | ICLog(@"ICCF_StopIC: Internet Config is not running!");
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| 67 | } else {
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| 68 | ICStop(ICCF_icInst);
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| 69 | ICCF_icInst = NULL;
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| 70 | }
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| 71 | }
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| 72 |
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| 73 | ICInstance ICCF_GetInst() {
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| 74 | NSCAssert(ICCF_icInst != NULL, @"Internal error: Called ICCF_GetInst without ICCF_StartIC");
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| 75 | return ICCF_icInst;
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| 76 | }
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| 77 |
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| 78 | // input/output 'range' is the range of source document which contains 'string'
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| 79 | void ICCF_ParseURL(NSString *string, NSRange *range) {
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| 80 | OSStatus err;
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| 81 | Handle h;
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| 82 | long selStart = 0, selEnd = range->length; // local offsets within 'string'
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| 83 | char *urlData = NULL;
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| 84 |
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| 85 | NSCAssert(selEnd == [string length], @"Internal error: URL string is wrong length");
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| 86 |
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| 87 | NS_DURING
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| 88 | if ([[NSCharacterSet characterSetWithCharactersInString: @";,."] characterIsMember:
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| 89 | [string characterAtIndex: selEnd - 1]]) {
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| 90 | selEnd--;
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| 91 | }
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| 92 | NSCharacterSet *alphanumericCharacterSet = [NSCharacterSet alphanumericCharacterSet];
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| 93 | while (![alphanumericCharacterSet characterIsMember: [string characterAtIndex: selStart]]) {
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| 94 | selStart++;
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| 95 | NSCAssert(selStart < selEnd, @"No URL is selected");
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| 96 | }
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| 97 |
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| 98 | string = [string substringWithRange: NSMakeRange(selStart, selEnd - selStart)];
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| 99 |
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| 100 | ICLog(@"Parsing URL |%@|", string);
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| 101 |
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| 102 | NSCAssert([string canBeConvertedToEncoding: NSASCIIStringEncoding], @"No URL is selected");
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| 103 |
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| 104 | urlData = (char *)malloc( (range->length + 1) * sizeof(char));
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| 105 | NSCAssert(urlData != NULL, @"Internal error: can't allocate memory for URL string");
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| 106 |
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| 107 | // 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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| 108 | [string getCString: urlData];
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| 109 |
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| 110 | h = NewHandle(0);
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| 111 | NSCAssert(h != NULL, @"Internal error: can't allocate URL handle");
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| 112 |
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| 113 | err = ICParseURL(ICCF_GetInst(), "\pmailto", urlData, range->length, &selStart, &selEnd, h);
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| 114 | DisposeHandle(h);
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| 115 |
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| 116 | ICCF_OSErrCAssert(err, @"ICParseURL");
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| 117 |
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| 118 | range->length = selEnd - selStart;
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| 119 | range->location += selStart;
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| 120 | NS_HANDLER
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| 121 | free(urlData);
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| 122 | [localException raise];
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| 123 | NS_ENDHANDLER
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| 124 |
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| 125 | free(urlData);
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| 126 | }
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| 127 |
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| 128 | NSRange ICCF_URLEnclosingRange(NSString *s, NSRange range) {
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| 129 | NSCharacterSet *urlLeftDelimiters = nil, *urlRightDelimiters = nil;
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| 130 | NSRange delimiterRange;
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| 131 | unsigned extraLen;
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| 132 |
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| 133 | ICCF_CheckRange(range);
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| 134 |
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| 135 | ICCF_Delimiters(&urlLeftDelimiters, &urlRightDelimiters);
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| 136 |
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| 137 | expandFront:
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| 138 | // XXX instead of 0, make this stop at the max URL length to prevent protracted searches
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| 139 |
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| 140 | // XXX here's how this is supposed to work:
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| 141 | // (http://web.sabi.net/) and <http://web.sabi.net/> should work if they are the entire document, even if clicking at the end/beginning of the document, not barfing with "no URL" (correct, as now) or selecting the final >, or ) (what would happen if we remove this "add 1" accommodation). But how about "http://web.sabi.net/(foo)"? That should work too, as long as it's not preceded by a (.
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| 142 | // Should probably backport to ICeCoffEETerminal, now I finally understand the method to this madness.
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| 143 | // add 1 to range to trap delimiters that are on the edge of the selection (i.e., <...)
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| 144 | delimiterRange = [s rangeOfCharacterFromSet: urlLeftDelimiters
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| 145 | options: NSLiteralSearch | NSBackwardsSearch
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| 146 | range: NSMakeRange(0, range.location + (range.location != [s length]))];
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| 147 | if (delimiterRange.location == NSNotFound) {
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| 148 | // extend to beginning of string
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| 149 | range.length += range.location;
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| 150 | range.location = 0;
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| 151 | } else {
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| 152 | NSCAssert(delimiterRange.length == 1, @"Internal error: delimiter matched range is not of length 1");
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| 153 | range.length += range.location - delimiterRange.location - 1;
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| 154 | range.location = delimiterRange.location + 1;
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| 155 |
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| 156 | // in url/(parens)stuff, handle clicking inside or after (parens).
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| 157 | if ([s characterAtIndex: delimiterRange.location] == '(' &&
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| 158 | range.location > 2 /* prevent wrapping, ordinarily not necessary */) {
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| 159 | if ([s rangeOfString: @")" options: NSLiteralSearch range: range].location != NSNotFound ||
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| 160 | [s rangeOfCharacterFromSet: [NSCharacterSet characterSetWithCharactersInString: @"/."]
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| 161 | options: NSLiteralSearch range: range].location == NSNotFound) {
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| 162 | range.location -= 2;
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| 163 | range.length += 2;
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| 164 | ICLog(@"expanding past (, now |%@|", [s substringWithRange: range]);
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| 165 | goto expandFront;
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| 166 | }
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| 167 | }
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| 168 | }
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| 169 |
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| 170 | ICCF_CheckRange(range);
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| 171 |
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| 172 | expandBack:
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| 173 | // XXX instead of length of string, make this stop at the max URL length to prevent protracted searches
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| 174 | // add 1 to range to trap delimiters that are on the edge of the selection (i.e., ...>)
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| 175 | extraLen = [s length] - range.location - range.length;
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| 176 | delimiterRange = [s rangeOfCharacterFromSet: urlRightDelimiters
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| 177 | options: NSLiteralSearch
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| 178 | range: NSMakeRange(range.location + range.length - (range.length != 0),
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| 179 | extraLen + (range.length != 0))];
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| 180 | if (delimiterRange.location == NSNotFound) {
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| 181 | // extend to end of string
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| 182 | range.length += extraLen;
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| 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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| 186 |
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| 187 | // grow URL past closing paren if we've seen an open paren
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| 188 | if ([s characterAtIndex: delimiterRange.location] == ')' &&
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| 189 | [s rangeOfString: @"(" options: NSLiteralSearch range: range].location != NSNotFound) {
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| 190 | range.length += 2;
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| 191 | ICLog(@"expanding past ), now |%@|", [s substringWithRange: range]);
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| 192 | goto expandBack;
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| 193 | }
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| 194 | }
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| 195 |
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| 196 | ICCF_CheckRange(range);
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| 197 |
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| 198 | ICCF_ParseURL([s substringWithRange: range], &range);
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| 199 |
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| 200 | return range;
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| 201 | } |
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