123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279 |
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using ExCSS.Model;
- using ExCSS.Model.TextBlocks;
- // ReSharper disable once CheckNamespace
- using System;
- //The MIT License (MIT)
- //Copyright (c) [year] [fullname]
- //Permission is hereby granted, free of charge, to any person obtaining a copy
- //of this software and associated documentation files (the "Software"), to deal
- //in the Software without restriction, including without limitation the rights
- //to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- //copies of the Software, and to permit persons to whom the Software is
- //furnished to do so, subject to the following conditions:
- //The above copyright notice and this permission notice shall be included in all
- //copies or substantial portions of the Software.
- //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- //SOFTWARE.
- #pragma warning disable
- namespace ExCSS
- {
- internal delegate void ParseErrorEventHandler(StylesheetParseError e);
- public sealed partial class Parser
- {
- private SelectorFactory _selectorFactory;
- private Stack<FunctionBuffer> _functionBuffers;
- private Lexer _lexer;
- private bool _isFraction;
- private Property _property;
- private TermList _terms = new TermList();
- private StyleSheet _styleSheet;
- private Stack<RuleSet> _activeRuleSets;
- private StringBuilder _buffer;
- private ParsingContext _parsingContext;
- public StyleSheet Parse(string css)
- {
- _selectorFactory = new SelectorFactory();
- _functionBuffers = new Stack<FunctionBuffer>();
- _styleSheet = new StyleSheet();
- _activeRuleSets = new Stack<RuleSet>();
- _lexer = new Lexer(new StylesheetReader(css)) { ErrorHandler = HandleLexerError };
- SetParsingContext(ParsingContext.DataBlock);
- var tokens = _lexer.Tokens;
- foreach (var token in tokens)
- {
- if (ParseTokenBlock(token))
- {
- continue;
- }
- HandleLexerError(ParserError.UnexpectedLineBreak, ErrorMessages.Default);
- }
- if (_property != null)
- {
- ParseTokenBlock(SpecialCharacter.Semicolon);
- }
- return _styleSheet;
- }
- internal static BaseSelector ParseSelector(string selector)
- {
- var tokenizer = new Lexer(new StylesheetReader(selector));
- var tokens = tokenizer.Tokens;
- var selctor = new SelectorFactory();
- foreach (var token in tokens)
- {
- selctor.Apply(token);
- }
- var result = selctor.GetSelector();
- return result;
- }
- internal static RuleSet ParseRule(string css)
- {
- var parser = new Parser();
- var styleSheet = parser.Parse(css);
- return styleSheet.Rules.Count > 0
- ? styleSheet.Rules[0]
- : null;
- }
- internal static StyleDeclaration ParseDeclarations(string declarations, bool quirksMode = false)
- {
- var decl = new StyleDeclaration();
- AppendDeclarations(decl, declarations, quirksMode);
- return decl;
- }
- internal static void AppendDeclarations(StyleDeclaration list, string css, bool quirksMode = false)
- {
- var parser = new Parser();//(new StyleSheet(), new StylesheetReader(declarations))
- parser.AddRuleSet(list.ParentRule ?? new StyleRule(list));
- parser._parsingContext = ParsingContext.InDeclaration;
- parser.Parse(css);
- }
- internal void HandleLexerError(ParserError error, string message)
- {
- _styleSheet.Errors.Add(new StylesheetParseError(error, message, _lexer.Stream.Line, _lexer.Stream.Column));
- }
- private bool AddTerm(Term value)
- {
- if (_isFraction)
- {
- if (_terms.Length > 0)
- {
- value = new PrimitiveTerm(UnitType.Unknown, _terms[0] + "/" + value);
- _terms = new TermList();
- }
- _isFraction = false;
- }
- if (_functionBuffers.Count > 0)
- {
- _functionBuffers.Peek().TermList.Add(value);
- }
- else if (_terms.Length == 0)
- {
- _terms.AddTerm(value);
- }
- else if (_parsingContext == ParsingContext.InSingleValue)
- {
- _terms.AddTerm(value);
- }
- else
- {
- return false;
- }
- return true;
- }
- private void FinalizeProperty()
- {
- if (_property != null)
- {
- if (_terms.Length > 1)
- {
- _property.Term = _terms;
- }
- else
- {
- _property.Term = _terms[0];
- }
- }
- _terms = new TermList();
- _property = null;
- }
- private bool FinalizeRule()
- {
- if (_activeRuleSets.Count <= 0)
- {
- return false;
- }
- _activeRuleSets.Pop();
- return true;
- }
- private void AddRuleSet(RuleSet rule)
- {
- //rule.ParentStyleSheet = _styleSheet;
- if (_activeRuleSets.Count > 0)
- {
- var container = _activeRuleSets.Peek() as ISupportsRuleSets;
- if (container != null)
- {
- container.RuleSets.Add(rule);
- }
- }
- else
- {
- _styleSheet.Rules.Add(rule);
- }
- _activeRuleSets.Push(rule);
- }
- private void AddProperty(Property property)
- {
- _property = property;
- var rule = CurrentRule as ISupportsDeclarations;
- if (rule != null)
- {
- rule.Declarations.Add(property);
- }
- }
- private T CastRuleSet<T>() where T : RuleSet
- {
- if (_activeRuleSets.Count > 0)
- {
- return _activeRuleSets.Peek() as T;
- }
- return default(T);
- }
- private void SetParsingContext(ParsingContext newState)
- {
- switch (newState)
- {
- case ParsingContext.InSelector:
- _lexer.IgnoreComments = true;
- _lexer.IgnoreWhitespace = false;
- _selectorFactory.ResetFactory();
- break;
- case ParsingContext.InHexValue:
- case ParsingContext.InUnknown:
- case ParsingContext.InCondition:
- case ParsingContext.InSingleValue:
- case ParsingContext.InMediaValue:
- _lexer.IgnoreComments = true;
- _lexer.IgnoreWhitespace = false;
- break;
- default:
- _lexer.IgnoreComments = true;
- _lexer.IgnoreWhitespace = true;
- break;
- }
- _parsingContext = newState;
- }
- internal RuleSet CurrentRule
- {
- get
- {
- return _activeRuleSets.Count > 0
- ? _activeRuleSets.Peek()
- : null;
- }
- }
- }
- }
- #pragma warning restore
|