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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.patterns;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.util.ProcessingContext;
import dk.brics.automaton.Automaton;
import dk.brics.automaton.DatatypesAutomatonProvider;
import dk.brics.automaton.RegExp;
import dk.brics.automaton.RunAutomaton;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Collection;
import java.util.Collections;
import java.util.regex.Pattern;
/**
* @author peter
*/
public class StringPattern extends ObjectPattern<String, StringPattern> {
private static final InitialPatternCondition<String> CONDITION = new InitialPatternCondition<String>(String.class) {
@Override
public boolean accepts(@Nullable final Object o, final ProcessingContext context) {
return o instanceof String;
}
@Override
public void append(@NotNull @NonNls final StringBuilder builder, final String indent) {
builder.append("string()");
}
};
protected StringPattern() {
super(CONDITION);
}
@NotNull
public StringPattern startsWith(@NonNls @NotNull final String s) {
return with(new PatternCondition<String>("startsWith") {
@Override
public boolean accepts(@NotNull final String str, final ProcessingContext context) {
return str.startsWith(s);
}
});
}
@NotNull
public StringPattern endsWith(@NonNls @NotNull final String s) {
return with(new PatternCondition<String>("endsWith") {
@Override
public boolean accepts(@NotNull final String str, final ProcessingContext context) {
return str.endsWith(s);
}
});
}
@NotNull
public StringPattern contains(@NonNls @NotNull final String s) {
return with(new PatternCondition<String>("contains") {
@Override
public boolean accepts(@NotNull final String str, final ProcessingContext context) {
return str.contains(s);
}
});
}
@NotNull
public StringPattern containsChars(@NonNls @NotNull final String s) {
return with(new PatternCondition<String>("containsChars") {
@Override
public boolean accepts(@NotNull final String str, final ProcessingContext context) {
for (int i=0, len=s.length(); i<len; i++) {
if (str.indexOf(s.charAt(i))>-1) return true;
}
return false;
}
});
}
@NotNull
public StringPattern matches(@NonNls @NotNull final String s) {
final String escaped = StringUtil.escapeToRegexp(s);
if (escaped.equals(s)) {
return equalTo(s);
}
// may throw PatternSyntaxException here
final Pattern pattern = Pattern.compile(s);
return with(new ValuePatternCondition<String>("matches") {
@Override
public boolean accepts(@NotNull final String str, final ProcessingContext context) {
return pattern.matcher(newBombedCharSequence(str)).matches();
}
@Override
public Collection<String> getValues() {
return Collections.singleton(s);
}
});
}
@NotNull
public StringPattern matchesBrics(@NonNls @NotNull final String s) {
final String escaped = StringUtil.escapeToRegexp(s);
if (escaped.equals(s)) {
return equalTo(s);
}
StringBuilder sb = new StringBuilder(s.length()*5);
for (int i = 0; i < s.length(); i++) {
final char c = s.charAt(i);
if(c == ' ') {
sb.append("<whitespacechar>");
}
else
//This is really stupid and inconvenient builder - it breaks any normal pattern with uppercase
if(Character.isUpperCase(c)) {
sb.append('[').append(Character.toUpperCase(c)).append(Character.toLowerCase(c)).append(']');
}
else
{
sb.append(c);
}
}
final RegExp regExp = new RegExp(sb.toString());
final Automaton automaton = regExp.toAutomaton(new DatatypesAutomatonProvider());
final RunAutomaton runAutomaton = new RunAutomaton(automaton, true);
return with(new ValuePatternCondition<String>("matchesBrics") {
@Override
public boolean accepts(@NotNull String str, final ProcessingContext context) {
if (!str.isEmpty() && (str.charAt(0) == '"' || str.charAt(0) == '\'')) str = str.substring(1);
return runAutomaton.run(str);
}
@Override
public Collection<String> getValues() {
return Collections.singleton(s);
}
});
}
@NotNull
public StringPattern contains(@NonNls @NotNull final ElementPattern<Character> pattern) {
return with(new PatternCondition<String>("contains") {
@Override
public boolean accepts(@NotNull final String str, final ProcessingContext context) {
for (int i = 0; i < str.length(); i++) {
if (pattern.accepts(str.charAt(i))) return true;
}
return false;
}
});
}
public StringPattern longerThan(final int minLength) {
return with(new PatternCondition<String>("longerThan") {
@Override
public boolean accepts(@NotNull final String s, final ProcessingContext context) {
return s.length() > minLength;
}
});
}
public StringPattern shorterThan(final int maxLength) {
return with(new PatternCondition<String>("shorterThan") {
@Override
public boolean accepts(@NotNull final String s, final ProcessingContext context) {
return s.length() < maxLength;
}
});
}
public StringPattern withLength(final int length) {
return with(new PatternCondition<String>("withLength") {
@Override
public boolean accepts(@NotNull final String s, final ProcessingContext context) {
return s.length() == length;
}
});
}
@Override
@NotNull
public StringPattern oneOf(@NonNls final String... values) {
return super.oneOf(values);
}
@NotNull
public StringPattern oneOfIgnoreCase(@NonNls final String... values) {
return with(new CaseInsensitiveValuePatternCondition("oneOfIgnoreCase", values));
}
@Override
@NotNull
public StringPattern oneOf(@NonNls final Collection<String> set) {
return super.oneOf(set);
}
@NotNull
public static CharSequence newBombedCharSequence(@NotNull CharSequence sequence) {
return new StringUtil.BombedCharSequence(sequence) {
@Override
protected void checkCanceled() {
ProgressManager.checkCanceled();
}
};
}
}
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