+/*
+ * 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.List;
+
+import jexer.TWidget;
+
+/**
+ * TParagraph contains a reflowable collection of TWords, some of which are
+ * clickable links.
+ */
+public class TParagraph extends TWidget {
+
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Topic text and links converted to words.
+ */
+ private List<TWord> words;
+
+ /**
+ * If true, add one row to height as a paragraph separator. Note package
+ * private access.
+ */
+ boolean separator = true;
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Public constructor.
+ *
+ * @param parent parent widget
+ * @param words the pieces of the paragraph to display
+ */
+ public TParagraph(final THelpText parent, final List<TWord> words) {
+
+ // Set parent and window
+ super(parent, 0, 0, parent.getWidth() - 1, 1);
+
+ this.words = words;
+ for (TWord word: words) {
+ word.setParent(this, false);
+ }
+
+ reflowData();
+ }
+
+ // ------------------------------------------------------------------------
+ // TWidget ----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ // ------------------------------------------------------------------------
+ // TParagraph -------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Reposition the words in this paragraph to reflect the new width, and
+ * set the paragraph height.
+ */
+ public void reflowData() {
+ int x = 0;
+ int y = 0;
+ for (TWord word: words) {
+ if (x + word.getWidth() >= getWidth()) {
+ x = 0;
+ y++;
+ }
+ word.setX(x);
+ word.setY(y);
+ x += word.getWidth() + 1;
+ }
+ if (separator) {
+ setHeight(y + 2);
+ } else {
+ setHeight(y + 1);
+ }
+ }
+
+ /**
+ * Try to select a previous link.
+ *
+ * @return true if there was a previous link in this paragraph to select
+ */
+ public boolean up() {
+ if (words.size() == 0) {
+ return false;
+ }
+ if (getActiveChild() == this) {
+ // No selectable links
+ return false;
+ }
+ TWord firstWord = null;
+ TWord lastWord = null;
+ for (TWord word: words) {
+ if (word.isEnabled()) {
+ if (firstWord == null) {
+ firstWord = word;
+ }
+ lastWord = word;
+ }
+ }
+ if (getActiveChild() == firstWord) {
+ return false;
+ }
+ switchWidget(false);
+ return true;
+ }
+
+ /**
+ * Try to select a next link.
+ *
+ * @return true if there was a next link in this paragraph to select
+ */
+ public boolean down() {
+ if (words.size() == 0) {
+ return false;
+ }
+ if (getActiveChild() == this) {
+ // No selectable links
+ return false;
+ }
+ TWord firstWord = null;
+ TWord lastWord = null;
+ for (TWord word: words) {
+ if (word.isEnabled()) {
+ if (firstWord == null) {
+ firstWord = word;
+ }
+ lastWord = word;
+ }
+ }
+ if (getActiveChild() == lastWord) {
+ return false;
+ }
+ switchWidget(true);
+ return true;
+ }
+
+
+}