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/*
* Copyright 2000-2012 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.psi.impl.source.tree.injected;
import com.intellij.openapi.editor.RangeMarker;
import com.intellij.openapi.util.ProperTextRange;
import com.intellij.openapi.util.Segment;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
class ShredImpl implements PsiLanguageInjectionHost.Shred {
private final RangeMarker relevantRangeInHost;
private final SmartPsiElementPointer<PsiLanguageInjectionHost> hostElementPointer;
private final TextRange range; // range in (decoded) PSI
private final String prefix;
private final String suffix;
ShredImpl(@NotNull PsiLanguageInjectionHost host,
@NotNull PsiFile hostPsiFile,
@NotNull final RangeMarker relevantRangeInHost,
@NotNull String prefix,
@NotNull String suffix,
@NotNull TextRange range) {
hostElementPointer = createHostSmartPointer(host, hostPsiFile);
this.relevantRangeInHost = relevantRangeInHost;
this.prefix = prefix;
this.suffix = suffix;
this.range = range;
assert isValid();
assert relevantRangeInHost.isValid();
}
public SmartPsiElementPointer<PsiLanguageInjectionHost> getSmartPointer() {
return hostElementPointer;
}
@NotNull
private static <T extends PsiLanguageInjectionHost> SmartPsiElementPointer<T> createHostSmartPointer(@NotNull T host,
@NotNull PsiFile hostPsiFile) {
return hostPsiFile.isPhysical()
? SmartPointerManager.getInstance(hostPsiFile.getProject()).createSmartPsiElementPointer(host, hostPsiFile)
: new IdentitySmartPointer<T>(host, hostPsiFile);
}
@Override
@Nullable("returns null when the host document marker is invalid")
public Segment getHostRangeMarker() {
RangeMarker marker = relevantRangeInHost;
return marker.isValid() ? marker : null;
}
@Override
@NotNull
public TextRange getRangeInsideHost() {
PsiLanguageInjectionHost host = getHost();
ProperTextRange textRange =
relevantRangeInHost.isValid() ? new ProperTextRange(relevantRangeInHost.getStartOffset(), relevantRangeInHost.getEndOffset()) : null;
if (host == null) {
if (textRange != null) return textRange;
Segment fromSP = hostElementPointer.getRange();
if (fromSP != null) return TextRange.create(fromSP);
return new TextRange(0,0);
}
TextRange hostTextRange = host.getTextRange();
textRange = textRange == null ? null : textRange.intersection(hostTextRange);
if (textRange == null) return new ProperTextRange(0, hostTextRange.getLength());
return textRange.shiftRight(-hostTextRange.getStartOffset());
}
@SuppressWarnings({"HardCodedStringLiteral"})
public String toString() {
PsiLanguageInjectionHost host = getHost();
return "Shred " + (host == null ? null : host.getTextRange()) + ": " + host +
" In host range: " + (relevantRangeInHost.isValid() ? "" : "!") +
"(" + relevantRangeInHost.getStartOffset() + "," + relevantRangeInHost.getEndOffset() + ");" +
" PSI range: " + range;
}
@Override
public boolean isValid() {
PsiLanguageInjectionHost host = getHost();
return relevantRangeInHost.isValid() && host != null && host.isValid();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
PsiLanguageInjectionHost.Shred shred = (PsiLanguageInjectionHost.Shred)o;
PsiLanguageInjectionHost host = getHost();
Segment hostRangeMarker = shred.getHostRangeMarker();
return host != null &&
host.equals(shred.getHost()) &&
prefix.equals(shred.getPrefix()) &&
suffix.equals(shred.getSuffix()) &&
range.equals(shred.getRange()) &&
hostRangeMarker != null &&
TextRange.create(relevantRangeInHost).equals(TextRange.create(hostRangeMarker));
}
@Override
public int hashCode() {
return range.hashCode();
}
@Override
public void dispose() {
relevantRangeInHost.dispose();
}
@Override
@Nullable
public PsiLanguageInjectionHost getHost() {
return hostElementPointer.getElement();
}
@NotNull
@Override
public TextRange getRange() {
return range;
}
@NotNull
@Override
public String getPrefix() {
return prefix;
}
@NotNull
@Override
public String getSuffix() {
return suffix;
}
}
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