blob: 8be2284e836097a044eaabf7a8b2d418fcf3f4ca (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* 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.openapi.editor.impl;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.ex.util.LexerEditorHighlighter;
import com.intellij.openapi.editor.highlighter.EditorHighlighter;
import com.intellij.openapi.editor.highlighter.EditorHighlighterFactory;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiManager;
import com.intellij.psi.impl.cache.impl.id.PlatformIdTableBuilding;
import com.intellij.psi.impl.search.LexerEditorHighlighterLexer;
import com.intellij.reference.SoftReference;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.lang.ref.WeakReference;
/**
* @author yole
*/
public class EditorHighlighterCache {
private static final Key<WeakReference<EditorHighlighter>> ourSomeEditorSyntaxHighlighter = Key.create("some editor highlighter");
private EditorHighlighterCache() {
}
public static void rememberEditorHighlighterForCachesOptimization(Document document, @NotNull final EditorHighlighter highlighter) {
document.putUserData(ourSomeEditorSyntaxHighlighter, new WeakReference<EditorHighlighter>(highlighter));
}
@Nullable
public static EditorHighlighter getEditorHighlighterForCachesBuilding(Document document) {
if (document == null) {
return null;
}
final WeakReference<EditorHighlighter> editorHighlighterWeakReference = document.getUserData(ourSomeEditorSyntaxHighlighter);
final EditorHighlighter someEditorHighlighter = SoftReference.dereference(editorHighlighterWeakReference);
if (someEditorHighlighter instanceof LexerEditorHighlighter &&
((LexerEditorHighlighter)someEditorHighlighter).isValid()
) {
return someEditorHighlighter;
}
document.putUserData(ourSomeEditorSyntaxHighlighter, null);
return null;
}
@Nullable
public static Lexer getLexerBasedOnLexerHighlighter(CharSequence text, VirtualFile virtualFile, Project project) {
EditorHighlighter highlighter = null;
PsiFile psiFile = virtualFile != null ? PsiManager.getInstance(project).findFile(virtualFile) : null;
final Document document = psiFile != null ? PsiDocumentManager.getInstance(project).getDocument(psiFile) : null;
final EditorHighlighter cachedEditorHighlighter;
boolean alreadyInitializedHighlighter = false;
if (document != null &&
(cachedEditorHighlighter = getEditorHighlighterForCachesBuilding(document)) != null &&
PlatformIdTableBuilding.checkCanUseCachedEditorHighlighter(text, cachedEditorHighlighter)) {
highlighter = cachedEditorHighlighter;
alreadyInitializedHighlighter = true;
}
else if (virtualFile != null) {
highlighter = EditorHighlighterFactory.getInstance().createEditorHighlighter(project, virtualFile);
}
if (highlighter != null) {
return new LexerEditorHighlighterLexer(highlighter, alreadyInitializedHighlighter);
}
return null;
}
}
|
