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Side by Side Diff: lib/src/validate.dart

Issue 998843003: pkg/csslib: formatting (Closed) Base URL: https://github.com/dart-lang/csslib@master
Patch Set: Created 5 years, 9 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 library csslib.src.validate; 5 library csslib.src.validate;
6 6
7 import 'package:csslib/visitor.dart'; 7 import 'package:csslib/visitor.dart';
8 import 'package:source_span/source_span.dart'; 8 import 'package:source_span/source_span.dart';
9 9
10 /** Can be thrown on any Css runtime problem includes source location. */ 10 /** Can be thrown on any Css runtime problem includes source location. */
(...skipping 22 matching lines...) Expand all
33 throw new CssSelectorException( 33 throw new CssSelectorException(
34 'Selectors can not have combinators (>, +, or ~) before $error'); 34 'Selectors can not have combinators (>, +, or ~) before $error');
35 } 35 }
36 } 36 }
37 37
38 static int _elementIdCheck(var selector, int matches) { 38 static int _elementIdCheck(var selector, int matches) {
39 if (selector.isCombinatorNone() && matches == 0) { 39 if (selector.isCombinatorNone() && matches == 0) {
40 // Perfect just one element id returns matches of -1. 40 // Perfect just one element id returns matches of -1.
41 return -1; 41 return -1;
42 } else if (selector.isCombinatorDescendant()) { 42 } else if (selector.isCombinatorDescendant()) {
43 String tooMany = selector.simpleSelector.toString(); 43 String tooMany = selector.simpleSelector.toString();
44 throw new CssSelectorException( 44 throw new CssSelectorException(
45 'Use of Id selector must be singleton starting at $tooMany'); 45 'Use of Id selector must be singleton starting at $tooMany');
46 } else { 46 } else {
47 String error = selector.simpleSelector.toString(); 47 String error = selector.simpleSelector.toString();
48 throw new CssSelectorException( 48 throw new CssSelectorException(
49 'Selectors can not have combinators (>, +, or ~) before $error'); 49 'Selectors can not have combinators (>, +, or ~) before $error');
50 } 50 }
51 } 51 }
52 52
53 // Validate the @{css expression} only .class and #elementId are valid inside 53 // Validate the @{css expression} only .class and #elementId are valid inside
54 // of @{...}. 54 // of @{...}.
55 static template(List<Selector> selectors) { 55 static template(List<Selector> selectors) {
56 var errorSelector; // signal which selector didn't match. 56 var errorSelector; // signal which selector didn't match.
57 bool found = false; // signal if a selector is matched. 57 bool found = false; // signal if a selector is matched.
58 int matches = 0; // < 0 IdSelectors, > 0 ClassSelector 58 int matches = 0; // < 0 IdSelectors, > 0 ClassSelector
59 59
60 // At most one selector group (any number of simple selector sequences). 60 // At most one selector group (any number of simple selector sequences).
61 assert(selectors.length <= 1); 61 assert(selectors.length <= 1);
62 62
63 for (final sels in selectors) { 63 for (final sels in selectors) {
64 for (final selector in sels.simpleSelectorSequences) { 64 for (final selector in sels.simpleSelectorSequences) {
65 found = false; 65 found = false;
66 var simpleSelector = selector.simpleSelector; 66 var simpleSelector = selector.simpleSelector;
67 if (simpleSelector is ClassSelector) { 67 if (simpleSelector is ClassSelector) {
68 // Any class name starting with an underscore is a private class name 68 // Any class name starting with an underscore is a private class name
69 // that doesn't have to match the world of known classes. 69 // that doesn't have to match the world of known classes.
70 if (!simpleSelector.name.startsWith('_')) { 70 if (!simpleSelector.name.startsWith('_')) {
71 // TODO(terry): For now iterate through all classes look for faster 71 // TODO(terry): For now iterate through all classes look for faster
72 // mechanism hash map, etc. 72 // mechanism hash map, etc.
73 for (final className in classes) { 73 for (final className in classes) {
74 if (selector.simpleSelector.name == className) { 74 if (selector.simpleSelector.name == className) {
75 matches = _classNameCheck(selector, matches); 75 matches = _classNameCheck(selector, matches);
76 found = true; // .class found. 76 found = true; // .class found.
77 break; 77 break;
78 } 78 }
79 for (final className2 in classes) { 79 for (final className2 in classes) {
80 print(className2); 80 print(className2);
81 } 81 }
82 } 82 }
83
84 } else { 83 } else {
85 // Don't check any class name that is prefixed with an underscore. 84 // Don't check any class name that is prefixed with an underscore.
86 // However, signal as found and bump up matches; it's a valid class 85 // However, signal as found and bump up matches; it's a valid class
87 // name. 86 // name.
88 matches = _classNameCheck(selector, matches); 87 matches = _classNameCheck(selector, matches);
89 found = true; // ._class are always okay. 88 found = true; // ._class are always okay.
90 } 89 }
91 } else if (simpleSelector is IdSelector) { 90 } else if (simpleSelector is IdSelector) {
92 // Any element id starting with an underscore is a private element id 91 // Any element id starting with an underscore is a private element id
93 // that doesn't have to match the world of known elemtn ids. 92 // that doesn't have to match the world of known elemtn ids.
94 if (!simpleSelector.name.startsWith('_')) { 93 if (!simpleSelector.name.startsWith('_')) {
95 for (final id in ids) { 94 for (final id in ids) {
96 if (simpleSelector.name == id) { 95 if (simpleSelector.name == id) {
97 matches = _elementIdCheck(selector, matches); 96 matches = _elementIdCheck(selector, matches);
98 found = true; // #id found. 97 found = true; // #id found.
99 break; 98 break;
100 } 99 }
101 } 100 }
102 } else { 101 } else {
103 // Don't check any element ID that is prefixed with an underscore. 102 // Don't check any element ID that is prefixed with an underscore.
104 // Signal as found and bump up matches; it's a valid element ID. 103 // Signal as found and bump up matches; it's a valid element ID.
105 matches = _elementIdCheck(selector, matches); 104 matches = _elementIdCheck(selector, matches);
106 found = true; // #_id are always okay 105 found = true; // #_id are always okay
107 } 106 }
108 } else { 107 } else {
109 String badSelector = simpleSelector.toString(); 108 String badSelector = simpleSelector.toString();
110 throw new CssSelectorException( 109 throw new CssSelectorException(
111 'Invalid template selector $badSelector'); 110 'Invalid template selector $badSelector');
112 } 111 }
113 112
114 if (!found) { 113 if (!found) {
115 String unknownName = simpleSelector.toString(); 114 String unknownName = simpleSelector.toString();
116 throw new CssSelectorException('Unknown selector name $unknownName'); 115 throw new CssSelectorException('Unknown selector name $unknownName');
117 } 116 }
118 } 117 }
119 } 118 }
120 119
121 // Every selector must match. 120 // Every selector must match.
122 Selector selector = selectors[0]; 121 Selector selector = selectors[0];
123 assert((matches >= 0 ? matches : -matches) == 122 assert((matches >= 0 ? matches : -matches) ==
124 selector.simpleSelectorSequences.length); 123 selector.simpleSelectorSequences.length);
125 } 124 }
126 } 125 }
127
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