org.netbeans.modules.css.visual.CssCaretAwareSourceTask Maven / Gradle / Ivy
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* to you 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
*
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* software distributed under the License is distributed on an
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package org.netbeans.modules.css.visual;
import java.util.Collection;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicReference;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JEditorPane;
import javax.swing.SwingUtilities;
import org.netbeans.api.editor.mimelookup.MimeRegistration;
import org.netbeans.modules.css.lib.api.CssParserResult;
import org.netbeans.modules.css.model.api.Model;
import org.netbeans.modules.css.model.api.ModelVisitor;
import org.netbeans.modules.css.model.api.Rule;
import org.netbeans.modules.css.model.api.StyleSheet;
import org.netbeans.modules.css.visual.api.CssStylesTC;
import org.netbeans.modules.css.visual.api.RuleEditorController;
import org.netbeans.modules.parsing.api.Snapshot;
import org.netbeans.modules.parsing.spi.*;
import org.openide.cookies.EditorCookie;
import org.openide.filesystems.FileObject;
import org.openide.loaders.DataObject;
import org.openide.loaders.DataObjectNotFoundException;
import org.openide.text.NbDocument;
import org.openide.windows.WindowManager;
/**
*
* @author [email protected]
*/
public final class CssCaretAwareSourceTask extends ParserResultTask {
private static final Logger LOG = Logger.getLogger("rule.editor");
private static final String CSS_MIMETYPE = "text/css"; //NOI18N
private boolean cancelled;
@Override
public int getPriority() {
return 5000; //low priority
}
@Override
public Class getSchedulerClass() {
return Scheduler.CURSOR_SENSITIVE_TASK_SCHEDULER;
}
@Override
public void cancel() {
cancelled = true;
}
@Override
public void run(final CssParserResult result, SchedulerEvent event) {
final FileObject file = result.getSnapshot().getSource().getFileObject();
if (file == null) {
LOG.log(Level.FINE, "run() - file is null."); // NOI18N
return ;
}
final String mimeType = file.getMIMEType();
LOG.log(Level.FINER, "run(), file: {0}", new Object[]{file});
if(!mimeType.equals("text/css")) {
LOG.log(Level.FINE, "ignoring non-pure (text/css) file, actual mimetype is {0}", mimeType);
return ;
}
cancelled = false;
final int caretOffset;
if (event == null) {
caretOffset = -1;
} else {
if (event instanceof CursorMovedSchedulerEvent) {
caretOffset = ((CursorMovedSchedulerEvent) event).getCaretOffset();
} else {
LOG.log(Level.FINE, "run() - !(event instanceof CursorMovedSchedulerEvent)");
caretOffset = -1;
}
}
final Model model = Model.getModel(result); //do this outside EDT
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
runInEDT(result.getSnapshot(), model, file, mimeType, caretOffset);
}
});
}
private void runInEDT(Snapshot snapshot, Model model, final FileObject file, String mimeType, int caretOffset) {
LOG.log(Level.FINER, "runInEDT(), file: {0}, caret: {1}", new Object[]{file, caretOffset});
if (cancelled) {
LOG.log(Level.FINER, "cancelled");
return;
}
if (caretOffset == -1) {
try {
//dirty workaround
DataObject dobj = DataObject.find(file);
EditorCookie ec = dobj.getLookup().lookup(EditorCookie.class);
if (ec != null) {
JEditorPane pane = NbDocument.findRecentEditorPane(ec);
if (pane != null) {
caretOffset = pane.getCaretPosition();
}
}
} catch (DataObjectNotFoundException ex) {
//possibly deleted file, give up
return;
}
LOG.log(Level.INFO, "workarounded caret offset: {0}", caretOffset);
}
//find rule corresponding to the offset
Rule rule = findRuleAtOffset(snapshot, model, caretOffset);
//>>hack, remove once the css.lib css grammar gets finalized
if(rule != null && rule.getSelectorsGroup() == null) {
rule = null;
}
//< ruleRef = new AtomicReference();
model.runReadTask(new Model.ModelTask() {
@Override
public void run(StyleSheet styleSheet) {
styleSheet.accept(new ModelVisitor.Adapter() {
@Override
public void visitRule(Rule rule) {
if (cancelled) {
return;
}
if (astOffset >= rule.getStartOffset()) {
if(astOffset <= rule.getEndOffset()) {
//exactly in the rule or at its boundaries
ruleRef.set(rule);
} else {
//behind the rule close curly bracket.
//if the offset is at the same line as the rule
//end and there're only WS between,
//activate the rule
CharSequence source = snapshot.getText();
//weird - looks like parsing.api bug - the astoffset may point beond the snapshot's length?!?!?
int adjustedAstOffset = Math.min(source.length(), astOffset);
for(int i = adjustedAstOffset - 1; i >= 0; i--) {
if(i == rule.getEndOffset()) {
ruleRef.set(rule);
return ;
}
char c = source.charAt(i);
if(!(c == ' ' || c == '\t')) {
break; //some non-ws text //todo fix comments
}
if(c == '\n') {
break;
}
}
}
}
}
});
}
});
return ruleRef.get();
}
@MimeRegistration(mimeType = "text/css", service = TaskFactory.class)
public static class Factory extends TaskFactory {
@Override
public Collection create(Snapshot snapshot) {
String mimeType = snapshot.getMimeType();
if (mimeType.equals(CSS_MIMETYPE)) { //NOI18N
return Collections.singletonList(new CssCaretAwareSourceTask());
} else {
return Collections.emptyList();
}
}
}
}
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