com.d3x.morpheus.viz.html.HtmlCode Maven / Gradle / Ivy
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/*
* Copyright (C) 2014-2018 D3X Systems - All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.d3x.morpheus.viz.html;
import java.awt.*;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.function.Consumer;
import com.d3x.morpheus.util.IO;
/**
* A convenience API for programmatically creating simple HTML pages in the absence of a template engine such as Freemarker.
*
* @author Xavier Witdouck
*
* This is open source software released under the Apache 2.0 License
*/
public class HtmlCode {
private String indent = "";
private StringBuilder html = new StringBuilder();
/**
* Constructor
*/
public HtmlCode() {
super();
}
/**
* Convenience method to generate an HTML string given a writer
* @param consumer the consumer to call on the writer
* @return the resulting html string
*/
public static String createHtml(Consumer consumer) {
final HtmlCode writer = new HtmlCode();
consumer.accept(writer);
return writer.toString().trim();
}
/**
* Increases the indentation for the current line by a certain number of spaces
* @param count the number of spaces to indent by
* @return this writer
*/
public HtmlCode indent(int count) {
final StringBuilder indentation = new StringBuilder(indent);
for (int i=0; i consumer) {
final HtmlElement element = new HtmlElement(name, this);
consumer.accept(element);
element.close();
return this;
}
/**
* Flushes the contents of the buffer to a file
* @param file the file to flush the HTML buffer to
* @throws IOException if there is an IO Exception
*/
public void flush(File file) throws IOException {
try (BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file))) {
bos.write(html.toString().getBytes());
}
}
/**
* Writes the HTML code in this buffer to a temp file and opens it in default browser
* @return the file that contains generated HTML
* @throws IOException if there is an IO Exception
*/
public File browse() throws IOException {
return browse(File.createTempFile("chart_", ".html"));
}
/**
* Writes the HTML code in this buffer to the output file and opens it in default browser
* @param file the file to write HTML buffer to
* @return the same as argument file
* @throws IOException if there is an IO Exception
*/
public File browse(File file) throws IOException {
IO.writeText(html.toString(), file);
Desktop.getDesktop().browse(file.toURI());
return file;
}
@Override
public String toString() {
return html.toString();
}
/**
* Quick test to check output
* @param args
*/
public static void main(String[] args) {
final HtmlCode htmlCode = new HtmlCode();
htmlCode.newElement("html", html -> {
html.newElement("head", head -> {
head.newElement("title", title -> title.text("This is a test page"));
head.newElement("script", script -> {
script.newAttribute("type", "text/javascript");
script.newAttribute("src", "https://www.gstatic.com/charts/loader.js");
});
head.newElement("script", script -> {
script.newAttribute("type", "text/javascript");
script.text("var x = 20;\nvar y = 45;\nvar z = 2323;");
});
});
html.newElement("body", body -> {
body.newElement("p", p -> p.text("Hello World!"));
body.newElement("table", table -> {
table.newElement("thead", head -> {
head.newElement("tr", row -> {
row.newElement("td", td -> td.text("Column-0"));
row.newElement("td", td -> td.text("Column-1"));
row.newElement("td", td -> td.text("Column-2"));
row.newElement("td", td -> td.text("Column-3"));
row.newElement("td", td -> td.text("Column-4"));
});
});
for (int i=0; i<10; ++i) {
table.newElement("tr", row -> {
row.newElement("td", td -> td.text(String.valueOf(Math.random())));
row.newElement("td", td -> td.text(String.valueOf(Math.random())));
row.newElement("td", td -> td.text(String.valueOf(Math.random())));
row.newElement("td", td -> td.text(String.valueOf(Math.random())));
row.newElement("td", td -> td.text(String.valueOf(Math.random())));
});
}
});
});
});
System.out.println(htmlCode.toString());
}
}