| /******************************************************************************* |
| * Copyright (c) 2007, 2013 David Green and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * David Green - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.mylyn.wikitext.splitter; |
| |
| import java.text.Normalizer; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * @author David Green |
| * @since 3.0 |
| */ |
| public class DefaultSplittingStrategy extends SplittingStrategy { |
| |
| private int headingCount; |
| |
| private int firstHeadingSplit = 2; |
| |
| private int headingLevel; |
| |
| private int splitLevel = 1; |
| |
| private String id; |
| |
| private String label; |
| |
| private String target; |
| |
| private final Set<String> targets = new HashSet<String>(); |
| |
| @Override |
| public void heading(int level, String id, String label) { |
| if (level <= 0) { |
| return; |
| } |
| this.label = label; |
| this.id = id; |
| this.headingLevel = level; |
| ++headingCount; |
| if (isSplit()) { |
| target = computeSplitTarget(); |
| } |
| } |
| |
| @Override |
| public String getSplitTarget() { |
| return target; |
| } |
| |
| protected String computeSplitTarget() { |
| String candidate = computeSplitTargetCandidate(); |
| String computedTarget = candidate; |
| int seed = 1; |
| while (!targets.add(computedTarget)) { |
| computedTarget = candidate + (++seed); |
| } |
| return computedTarget + ".html"; //$NON-NLS-1$ |
| } |
| |
| protected String computeSplitTargetCandidate() { |
| String candidate = null; |
| if (label != null && label.length() > 0) { |
| candidate = stripUnsafeCharacters(label); |
| } |
| if (candidate == null && id != null) { |
| candidate = stripUnsafeCharacters(id); |
| } |
| if (candidate == null || candidate.length() == 0) { |
| candidate = "h" + headingLevel + "p" + headingCount; //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| return candidate; |
| } |
| |
| protected String stripUnsafeCharacters(String candidate) { |
| String safe = Normalizer.normalize(candidate, Normalizer.Form.NFD); |
| safe = safe.replaceAll("\\p{IsM}+", "").replaceAll("[^a-zA-Z0-9]+", "-"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ |
| return safe; |
| } |
| |
| @Override |
| public boolean isSplit() { |
| return headingCount >= firstHeadingSplit && splitLevel >= headingLevel; |
| } |
| |
| public int getFirstHeadingSplit() { |
| return firstHeadingSplit; |
| } |
| |
| public void setFirstHeadingSplit(int firstHeadingSplit) { |
| this.firstHeadingSplit = firstHeadingSplit; |
| } |
| |
| public int getSplitLevel() { |
| return splitLevel; |
| } |
| |
| public void setSplitLevel(int splitLevel) { |
| this.splitLevel = splitLevel; |
| } |
| } |