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/*
* Copyright 2000-2009 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.lexer;
import com.intellij.lang.*;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.fileTypes.FileTypeManager;
import com.intellij.openapi.fileTypes.SyntaxHighlighter;
import com.intellij.openapi.fileTypes.SyntaxHighlighterFactory;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.xml.XmlTokenType;
import org.jetbrains.annotations.Nullable;
public class HtmlHighlightingLexer extends BaseHtmlLexer {
private static final Logger LOG = Logger.getInstance("#com.intellij.lexer.HtmlHighlightingLexer");
private static final int EMBEDDED_LEXER_ON = 0x1 << BASE_STATE_SHIFT;
private static final int EMBEDDED_LEXER_STATE_SHIFT = BASE_STATE_SHIFT + 1;
private Lexer embeddedLexer;
private Lexer styleLexer;
private Lexer scriptLexer;
protected Lexer elLexer;
private boolean hasNoEmbeddments;
private final static FileType ourStyleFileType = FileTypeManager.getInstance().getStdFileType("CSS");
private static FileType ourInlineScriptFileType = null;
static {
// At the moment only JS.
HtmlInlineScriptTokenTypesProvider provider =
LanguageHtmlInlineScriptTokenTypesProvider.getInlineScriptProvider(Language.findLanguageByID("JavaScript"));
ourInlineScriptFileType = provider != null ? provider.getFileType() : null;
}
public class XmlEmbeddmentHandler implements TokenHandler {
public void handleElement(Lexer lexer) {
if (!hasSeenStyle() && !hasSeenScript() || hasNoEmbeddments) return;
final IElementType tokenType = lexer.getTokenType();
if ((tokenType==XmlTokenType.XML_ATTRIBUTE_VALUE_TOKEN && hasSeenAttribute()) ||
(tokenType==XmlTokenType.XML_DATA_CHARACTERS && hasSeenTag()) ||
tokenType==XmlTokenType.XML_COMMENT_CHARACTERS && hasSeenTag()
) {
setEmbeddedLexer();
if (embeddedLexer!=null) {
embeddedLexer.start(
getBufferSequence(),
HtmlHighlightingLexer.super.getTokenStart(),
skipToTheEndOfTheEmbeddment(),
embeddedLexer instanceof EmbedmentLexer ? ((EmbedmentLexer)embeddedLexer).getEmbeddedInitialState(tokenType) : 0
);
if (embeddedLexer.getTokenType() == null) {
// no content for embeddment
embeddedLexer = null;
}
}
}
}
}
public class ElEmbeddmentHandler implements TokenHandler {
public void handleElement(Lexer lexer) {
setEmbeddedLexer();
if (embeddedLexer != null) {
embeddedLexer.start(getBufferSequence(), HtmlHighlightingLexer.super.getTokenStart(), HtmlHighlightingLexer.super.getTokenEnd());
}
}
}
public HtmlHighlightingLexer() {
this(new MergingLexerAdapter(new FlexAdapter(new _HtmlLexer()),TOKENS_TO_MERGE),true);
}
protected HtmlHighlightingLexer(Lexer lexer, boolean caseInsensitive) {
super(lexer,caseInsensitive);
XmlEmbeddmentHandler value = new XmlEmbeddmentHandler();
registerHandler(XmlTokenType.XML_ATTRIBUTE_VALUE_TOKEN,value);
registerHandler(XmlTokenType.XML_DATA_CHARACTERS,value);
registerHandler(XmlTokenType.XML_COMMENT_CHARACTERS,value);
}
public void start(CharSequence buffer, int startOffset, int endOffset, int initialState) {
super.start(buffer, startOffset, endOffset, initialState);
if ((initialState & EMBEDDED_LEXER_ON)!=0) {
int state = initialState >> EMBEDDED_LEXER_STATE_SHIFT;
setEmbeddedLexer();
LOG.assertTrue(embeddedLexer!=null);
embeddedLexer.start(buffer,startOffset,skipToTheEndOfTheEmbeddment(),state);
} else {
embeddedLexer = null;
scriptLexer = null;
}
}
private void setEmbeddedLexer() {
Lexer newLexer = null;
if (hasSeenStyle()) {
if (styleLexer==null) {
styleLexer = (ourStyleFileType!=null)? SyntaxHighlighterFactory.getSyntaxHighlighter(ourStyleFileType, null, null).getHighlightingLexer():null;
}
newLexer = styleLexer;
} else if (hasSeenScript()) {
if (scriptLexer == null) {
if (hasSeenTag()) {
HtmlScriptContentProvider provider = findScriptContentProvider(scriptType);
if (provider != null) {
scriptLexer = provider.getHighlightingLexer();
} else {
scriptLexer = SyntaxHighlighterFactory.getSyntaxHighlighter(StdLanguages.TEXT, null, null).getHighlightingLexer();
}
}
else if (hasSeenAttribute()) {
SyntaxHighlighter syntaxHighlighter =
(ourInlineScriptFileType != null) ? SyntaxHighlighterFactory.getSyntaxHighlighter(ourInlineScriptFileType, null, null) : null;
scriptLexer = syntaxHighlighter != null ? syntaxHighlighter.getHighlightingLexer() : null;
}
}
newLexer = scriptLexer;
}
else {
newLexer = createELLexer(newLexer);
}
if (newLexer!=null) {
embeddedLexer = newLexer;
}
}
@Nullable
protected Lexer createELLexer(Lexer newLexer) {
return newLexer;
}
public void advance() {
if (embeddedLexer!=null) {
embeddedLexer.advance();
if (embeddedLexer.getTokenType()==null) {
embeddedLexer=null;
}
}
if (embeddedLexer==null) {
super.advance();
}
}
public IElementType getTokenType() {
if (embeddedLexer!=null) {
return embeddedLexer.getTokenType();
} else {
IElementType tokenType = super.getTokenType();
// TODO: fix no DOCTYPE highlighting
if (tokenType == null) return tokenType;
if (tokenType==XmlTokenType.XML_NAME) {
// we need to convert single xml_name for tag name and attribute name into to separate
// lex types for the highlighting!
final int state = getState() & BASE_STATE_MASK;
if (isHtmlTagState(state)) {
tokenType = XmlTokenType.XML_TAG_NAME;
}
}
else if (tokenType == XmlTokenType.XML_WHITE_SPACE || tokenType == XmlTokenType.XML_REAL_WHITE_SPACE) {
if (hasSeenTag() && (hasSeenStyle() || hasSeenScript())) {
tokenType = XmlTokenType.XML_WHITE_SPACE;
} else {
tokenType = (getState()!=0)?XmlTokenType.TAG_WHITE_SPACE:XmlTokenType.XML_REAL_WHITE_SPACE;
}
} else if (tokenType == XmlTokenType.XML_CHAR_ENTITY_REF ||
tokenType == XmlTokenType.XML_ENTITY_REF_TOKEN
) {
// we need to convert char entity ref & entity ref in comments as comment chars
final int state = getState() & BASE_STATE_MASK;
if (state == _HtmlLexer.COMMENT) return XmlTokenType.XML_COMMENT_CHARACTERS;
}
return tokenType;
}
}
public int getTokenStart() {
if (embeddedLexer!=null) {
return embeddedLexer.getTokenStart();
} else {
return super.getTokenStart();
}
}
public int getTokenEnd() {
if (embeddedLexer!=null) {
return embeddedLexer.getTokenEnd();
} else {
return super.getTokenEnd();
}
}
public int getState() {
int state = super.getState();
state |= ((embeddedLexer!=null)?EMBEDDED_LEXER_ON:0);
if (embeddedLexer!=null) state |= (embeddedLexer.getState() << EMBEDDED_LEXER_STATE_SHIFT);
return state;
}
protected boolean isHtmlTagState(int state) {
return state == _HtmlLexer.START_TAG_NAME || state == _HtmlLexer.END_TAG_NAME ||
state == _HtmlLexer.START_TAG_NAME2 || state == _HtmlLexer.END_TAG_NAME2;
}
public void setHasNoEmbeddments(boolean hasNoEmbeddments) {
this.hasNoEmbeddments = hasNoEmbeddments;
}
}
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