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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
*
* 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.android.ide.eclipse.adt.internal.editors.formatting;
import com.android.annotations.NonNull;
import com.android.annotations.Nullable;
import com.android.annotations.VisibleForTesting;
import com.android.ide.common.xml.XmlFormatPreferences;
import com.android.ide.eclipse.adt.internal.preferences.AdtPrefs;
import com.android.ide.common.xml.XmlAttributeSortOrder;
import org.eclipse.core.runtime.Preferences;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.ui.internal.editors.text.EditorsPlugin;
import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
import org.eclipse.wst.xml.core.internal.XMLCorePlugin;
import org.eclipse.wst.xml.core.internal.preferences.XMLCorePreferenceNames;
import org.w3c.dom.Attr;
import java.util.Comparator;
/**
* Formatting preferences used by the Android XML formatter.
*/
public class EclipseXmlFormatPreferences extends XmlFormatPreferences {
@VisibleForTesting
protected EclipseXmlFormatPreferences() {
}
/**
* Creates a new {@link EclipseXmlFormatPreferences} based on the current settings
* in {@link AdtPrefs}
*
* @return an {@link EclipseXmlFormatPreferences} object
*/
@NonNull
public static EclipseXmlFormatPreferences create() {
EclipseXmlFormatPreferences p = new EclipseXmlFormatPreferences();
AdtPrefs prefs = AdtPrefs.getPrefs();
p.useEclipseIndent = prefs.isUseEclipseIndent();
p.removeEmptyLines = prefs.isRemoveEmptyLines();
p.oneAttributeOnFirstLine = prefs.isOneAttributeOnFirstLine();
p.sortAttributes = prefs.getAttributeSort();
p.spaceBeforeClose = prefs.isSpaceBeforeClose();
return p;
}
@Override
@Nullable
public Comparator<Attr> getAttributeComparator() {
// Can't just skip sorting; the attribute table moves attributes out of order
// due to hashing, so sort by node positions
if (sortAttributes == XmlAttributeSortOrder.NO_SORTING) {
return EXISTING_ORDER_COMPARATOR;
}
return sortAttributes.getAttributeComparator();
}
private static final Comparator<Attr> EXISTING_ORDER_COMPARATOR = new Comparator<Attr>() {
@Override
public int compare(Attr attr1, Attr attr2) {
IndexedRegion region1 = (IndexedRegion) attr1;
IndexedRegion region2 = (IndexedRegion) attr2;
return region1.getStartOffset() - region2.getStartOffset();
}
};
// The XML module settings do not have a public API. We should replace this with JDT
// settings anyway since that's more likely what users have configured and want applied
// to their XML files
/**
* Returns the string to use to indent one indentation level
*
* @return the string used to indent one indentation level
*/
@Override
@SuppressWarnings({
"restriction", "deprecation"
})
public String getOneIndentUnit() {
if (useEclipseIndent) {
// Look up Eclipse indent preferences
// TODO: Use the JDT preferences instead, which make more sense
Preferences preferences = XMLCorePlugin.getDefault().getPluginPreferences();
int indentationWidth = preferences.getInt(XMLCorePreferenceNames.INDENTATION_SIZE);
String indentCharPref = preferences.getString(XMLCorePreferenceNames.INDENTATION_CHAR);
boolean useSpaces = XMLCorePreferenceNames.SPACE.equals(indentCharPref);
StringBuilder indentString = new StringBuilder();
for (int j = 0; j < indentationWidth; j++) {
if (useSpaces) {
indentString.append(' ');
} else {
indentString.append('\t');
}
}
mOneIndentUnit = indentString.toString();
}
return mOneIndentUnit;
}
/**
* Returns the number of spaces used to display a single tab character
*
* @return the number of spaces used to display a single tab character
*/
@Override
@SuppressWarnings("restriction") // Editor settings
public int getTabWidth() {
if (mTabWidth == -1) {
String key = AbstractDecoratedTextEditorPreferenceConstants.EDITOR_TAB_WIDTH;
try {
IPreferenceStore prefs = EditorsPlugin.getDefault().getPreferenceStore();
mTabWidth = prefs.getInt(key);
} catch (Throwable t) {
// Pass: We'll pick a suitable default instead below
}
if (mTabWidth <= 0) {
mTabWidth = 4;
}
}
return mTabWidth;
}
}
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