package org.multibit.hd.ui.utils;
import com.google.common.base.Strings;
import org.multibit.hd.ui.languages.Languages;
/**
* <p>Utilities to provide the following to application:</p>
* <ul>
* <li>Decorating text with HTML</li>
* </ul>
*
* @since 0.0.1
*/
public class HtmlUtils {
/**
* Utilities have private constructor
*/
private HtmlUtils() {
}
/**
* @param lines The lines to wrap in HTML
*
* @return A single block of HTML that provides appropriate text alignment (LTR or RTL) and line breaks for the locale
*/
public static String localiseWithLineBreaks(String[] lines) {
final StringBuilder sb;
if (Languages.isLeftToRight()) {
sb = new StringBuilder("<html><body style='width: 100%'><div align=left>");
} else {
sb = new StringBuilder("<html><body style='width: 100%'><div align=right>");
}
// Wrap in paragraphs to ensure word wrap
wrapAndLineBreak(lines, sb);
sb.append("</div></body></html>");
return sb.toString();
}
/**
* @param lines The lines to wrap in HTML
*
* @return A single block of HTML that provides centered text alignment and line breaks for the locale
*/
public static String localiseWithCenteredLinedBreaks(String[] lines) {
final StringBuilder sb = new StringBuilder("<html><body style='width: 100%'><div align=center>");
// Wrap in paragraphs to ensure word wrap
wrapAndLineBreak(lines, sb);
sb.append("</div></body></html>");
return sb.toString();
}
/**
* @param fragment The text fragment to use as the basis for emboldened text
* @param sourceText The source text containing the fragment
*
* @return The source text with HTML markup to embolden the matching fragments preserving the source case
*/
public static String applyBoldFragments(String fragment, String sourceText) {
if (Strings.isNullOrEmpty(fragment) || Strings.isNullOrEmpty(sourceText)) {
return "<html>" + sourceText + "</html>";
}
String lowerFragment = fragment.toLowerCase();
String lowerSource = sourceText.toLowerCase();
// Find the match locations within the source text
int sourceIndex = 0;
int matchIndex;
StringBuilder sb = new StringBuilder("<html>");
do {
// Match using case-insensitivity
matchIndex = lowerSource.indexOf(lowerFragment, sourceIndex);
if (matchIndex > -1) {
// Decorate the original source text to preserve case
sb.append(sourceText.substring(sourceIndex, matchIndex))
.append("<b>")
.append(sourceText.substring(matchIndex, matchIndex + fragment.length()))
.append("</b>");
sourceIndex = matchIndex + fragment.length();
}
} while (matchIndex > -1);
sb.append(sourceText.substring(sourceIndex));
sb.append("</html>");
return sb.toString();
}
/**
* <p>A naive HTML to text conversion. It assumes a simple unescaped HTML input and removes the tags.</p>
*
* @param html The source HTML
*
* @return The stripped text
*/
public static String stripHtml(String html) {
return html.replaceAll("<[^>]*>", "");
}
/**
* @param lines The lines to wrap in HTML
* @param sb The StringBuilder containing the result
*/
private static void wrapAndLineBreak(String[] lines, StringBuilder sb) {
boolean first = true;
for (String line : lines) {
if (!first) {
sb.append("<br>");
}
sb.append("<p>")
.append(line)
.append("</p>");
first = false;
}
}
}