--- /dev/null
+/*
+ * Jexer - Java Text User Interface
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2019 Kevin Lamonte
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * @author Kevin Lamonte [kevin.lamonte@gmail.com]
+ * @version 1
+ */
+package jexer.help;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.ResourceBundle;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * A Topic is a page of help text with a title and possibly links to other
+ * Topics.
+ */
+public class Topic implements Comparable<Topic> {
+
+ /**
+ * Translated strings.
+ */
+ private static final ResourceBundle i18n = ResourceBundle.getBundle(Topic.class.getName());
+
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The "not found" topic to display when a key or index term does not
+ * have an associated topic. Note package private access.
+ */
+ static Topic NOT_FOUND = null;
+
+ /**
+ * The regex for identifying index tags.
+ */
+ private static final String INDEX_REGEX_STR = "\\#\\{([^\\}]*)\\}";
+
+ /**
+ * The regex for identifying link tags.
+ */
+ private static final String LINK_REGEX_STR = "\\[([^\\]]*)\\]\\(([^\\)]*)\\)";
+
+ /**
+ * The regex for identifying words.
+ */
+ private static final String WORD_REGEX_STR = "[ \\t]+";
+
+ /**
+ * The index match regex.
+ */
+ private static Pattern INDEX_REGEX;
+
+ /**
+ * The link match regex.
+ */
+ private static Pattern LINK_REGEX;
+
+ /**
+ * The word match regex.
+ */
+ private static Pattern WORD_REGEX;
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The title for this topic.
+ */
+ private String title;
+
+ /**
+ * The text for this topic.
+ */
+ private String text;
+
+ /**
+ * The index keys in this topic.
+ */
+ private Set<String> indexKeys = new HashSet<String>();
+
+ /**
+ * The links in this topic.
+ */
+ private List<Link> links = new ArrayList<Link>();
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Static constructor.
+ */
+ static {
+ try {
+ INDEX_REGEX = Pattern.compile(INDEX_REGEX_STR);
+ LINK_REGEX = Pattern.compile(LINK_REGEX_STR);
+ WORD_REGEX = Pattern.compile(WORD_REGEX_STR);
+
+ NOT_FOUND = new Topic(i18n.getString("topicNotFoundTitle"),
+ i18n.getString("topicNotFoundText"));
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+
+ /**
+ * Public constructor.
+ *
+ * @param title the topic title
+ * @param text the topic text
+ */
+ public Topic(final String title, final String text) {
+ this.title = title;
+ processText(text);
+ }
+
+ /**
+ * Package private constructor.
+ *
+ * @param title the topic title
+ * @param text the topic text
+ * @param links links to add after processing text
+ */
+ Topic(final String title, final String text, final List<Link> links) {
+ this.title = title;
+ processText(text);
+ this.links.addAll(links);
+ }
+
+ // ------------------------------------------------------------------------
+ // Topic ------------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Get the topic title.
+ *
+ * @return the title
+ */
+ public String getTitle() {
+ return title;
+ }
+
+ /**
+ * Get the topic text.
+ *
+ * @return the text
+ */
+ public String getText() {
+ return text;
+ }
+
+ /**
+ * Get the index keys.
+ *
+ * @return the keys
+ */
+ public Set<String> getIndexKeys() {
+ return indexKeys;
+ }
+
+ /**
+ * Get the links.
+ *
+ * @return the links
+ */
+ public List<Link> getLinks() {
+ return links;
+ }
+
+ /**
+ * Comparison operator.
+ *
+ * @param that another Topic instance
+ * @return comparison by topic title
+ */
+ public int compareTo(final Topic that) {
+ return title.compareTo(that.title);
+ }
+
+ /**
+ * Generate a human-readable string for this widget.
+ *
+ * @return a human-readable string
+ */
+ @Override
+ public String toString() {
+ return String.format("%s(%8x) topic %s text %s links %s indexKeys %s",
+ getClass().getName(), hashCode(), title, text, links, indexKeys);
+ }
+
+ /**
+ * Process a string through the regexes, building up the indexes and
+ * links.
+ *
+ * @param text the text to process
+ */
+ private void processText(final String text) {
+ StringBuilder sb = new StringBuilder();
+ String [] lines = text.split("\n");
+ int wordIndex = 0;
+ for (String line: lines) {
+ line = line.trim();
+
+ String cleanLine = "";
+
+ // System.err.println("LINE " + wordIndex + " : '" + line + "'");
+
+ Matcher index = INDEX_REGEX.matcher(line);
+ int start = 0;
+ while (index.find()) {
+ cleanLine += line.substring(start, index.start());
+ String key = index.group(1);
+ cleanLine += key;
+ start = index.end();
+ // System.err.println("ADD KEY: " + key);
+ indexKeys.add(key);
+ }
+ cleanLine += line.substring(start);
+
+ line = cleanLine;
+ cleanLine = "";
+
+ /*
+ System.err.println("line after removing #{index} tags: " +
+ wordIndex + " '" + line + "'");
+ */
+
+ Matcher link = LINK_REGEX.matcher(line);
+ start = 0;
+
+ boolean hasLink = link.find();
+
+ // System.err.println("hasLink " + hasLink);
+
+ while (true) {
+
+ if (hasLink == false) {
+ cleanLine += line.substring(start);
+
+ String remaining = line.substring(start).trim();
+ Matcher word = WORD_REGEX.matcher(remaining);
+ while (word.find()) {
+ // System.err.println("word.find() true");
+ wordIndex++;
+ }
+ if (remaining.length() > 0) {
+ // The last word on the line.
+ wordIndex++;
+ }
+ break;
+ }
+
+ assert (hasLink == true);
+
+ int linkWordIndex = link.start();
+ int cleanLineStart = cleanLine.length();
+ cleanLine += line.substring(start, linkWordIndex);
+ String linkText = link.group(1);
+ String topic = link.group(2);
+ cleanLine += linkText;
+ start = link.end();
+
+ // Increment wordIndex until we reach the first word of
+ // the link text.
+ Matcher word = WORD_REGEX.matcher(cleanLine.
+ substring(cleanLineStart));
+ while (word.find()) {
+ if (word.end() <= linkWordIndex) {
+ wordIndex++;
+ } else {
+ // We have found the word that matches the first
+ // word of link text, bail out.
+ break;
+ }
+ }
+ /*
+ System.err.println("ADD LINK --> " + topic + ": '" +
+ linkText + "' word index " + wordIndex);
+ */
+ links.add(new Link(topic, linkText, wordIndex));
+
+ // The rest of the words in the link text.
+ while (word.find()) {
+ wordIndex++;
+ }
+ // The final word after the last whitespace.
+ wordIndex++;
+
+ hasLink = link.find();
+ if (hasLink) {
+ wordIndex += 3;
+ }
+ }
+
+
+ /*
+ System.err.println("line after removing [link](...) tags: '" +
+ cleanLine + "'");
+ */
+
+ // Append the entire line.
+ sb.append(cleanLine);
+ sb.append("\n");
+
+ this.text = sb.toString();
+
+ } // for (String line: lines)
+
+ }
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff