io.github.albertus82.jface.maps.leaflet.LeafletMapDialog Maven / Gradle / Ivy

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Java SWT/JFace Utility Library including a Preferences Framework, Lightweight HTTP Server and macOS support.
There is a newer version: 20.1.0
package io.github.albertus82.jface.maps.leaflet;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Collection;
import java.util.Map.Entry;

import org.eclipse.swt.widgets.Shell;

import io.github.albertus82.jface.maps.MapDialog;
import io.github.albertus82.jface.maps.MapMarker;
import io.github.albertus82.net.httpserver.html.HtmlUtils;
import io.github.albertus82.util.IOUtils;
import io.github.albertus82.util.NewLine;

public class LeafletMapDialog extends MapDialog {

	private static final String PLACEHOLDER_PREFIX = "/* {{";
	private static final String PLACEHOLDER_SUFFIX = "}} */";

	private final LeafletMapOptions options = new LeafletMapOptions();

	public LeafletMapDialog(final Shell parent) {
		super(parent);
	}

	public LeafletMapDialog(final Shell parent, final int style) {
		super(parent, style);
	}

	public static String parseLine(final String line, final LeafletMapOptions options, final Collection markers, final String other) {
		// Options
		if (line.contains(OPTIONS_PLACEHOLDER)) {
			final StringBuilder optionsBlock = new StringBuilder();
			optionsBlock.append(String.format("map.setView([%s, %s], %d);", options.getCenterLat(), options.getCenterLng(), options.getZoom()));
			if (!options.getControls().containsKey(LeafletMapControl.LAYERS)) {
				optionsBlock.append(NewLine.SYSTEM_LINE_SEPARATOR);
				optionsBlock.append(String.format("L.tileLayer('%s', { maxZoom: %d, attribution: '%s' }).addTo(map);", HtmlUtils.escapeEcmaScript("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"), 19, HtmlUtils.escapeEcmaScript("© OpenStreetMap")));
			}
			for (final Entry control : options.getControls().entrySet()) {
				optionsBlock.append(NewLine.SYSTEM_LINE_SEPARATOR);
				optionsBlock.append(String.format("map.addControl(L.control.%s(%s));", control.getKey().getConstructor(), control.getValue() == null ? "" : control.getValue().trim()));
			}
			return optionsBlock.toString().trim();
		}
		// Markers
		else if (line.contains(MARKERS_PLACEHOLDER)) {
			if (markers == null || markers.isEmpty()) {
				return null;
			}
			else {
				final StringBuilder markersBlock = new StringBuilder();
				for (final MapMarker marker : markers) {
					markersBlock.append(String.format("L.marker([%s, %s]).addTo(map).bindPopup('%s');", marker.getLatitude(), marker.getLongitude(), marker.getTitle() == null ? "" : HtmlUtils.escapeEcmaScript(marker.getTitle().replace(NewLine.SYSTEM_LINE_SEPARATOR, "
").trim())));
					markersBlock.append(NewLine.SYSTEM_LINE_SEPARATOR);
				}
				return markersBlock.toString().trim();
			}
		}
		else if (line.contains(OTHER_PLACEHOLDER)) {
			if (other == null || other.isEmpty()) {
				return null;
			}
			else {
				return other;
			}
		}
		else if (line.contains(PLACEHOLDER_PREFIX) && line.indexOf(PLACEHOLDER_PREFIX) == line.lastIndexOf(PLACEHOLDER_PREFIX) && line.contains(PLACEHOLDER_SUFFIX) && line.indexOf(PLACEHOLDER_SUFFIX) == line.lastIndexOf(PLACEHOLDER_SUFFIX) && line.indexOf(PLACEHOLDER_SUFFIX) > line.indexOf(PLACEHOLDER_PREFIX)) {
			final String resourceName = line.substring(line.indexOf(PLACEHOLDER_PREFIX) + PLACEHOLDER_PREFIX.length(), line.indexOf(PLACEHOLDER_SUFFIX));
			final String resource = readAllResource(resourceName);
			if (resource != null) {
				return resource;
			}
			else {
				return line;
			}
		}
		else {
			return line;
		}
	}

	private static String readAllResource(final String resourceName) {
		final StringBuilder buf = new StringBuilder();
		InputStream is = null;
		InputStreamReader isr = null;
		BufferedReader br = null;
		try {
			is = LeafletMapDialog.class.getResourceAsStream(resourceName);
			if (is == null) {
				return null;
			}
			isr = new InputStreamReader(is, StandardCharsets.UTF_8);
			br = new BufferedReader(isr);
			String line = null;
			while ((line = br.readLine()) != null) {
				buf.append(line).append(NewLine.CRLF);
			}
		}
		catch (final IOException e) {
			throw new IllegalStateException(e);
		}
		finally {
			IOUtils.closeQuietly(br, isr, is);
		}
		return buf.toString().trim();
	}

	@Override
	public String parseLine(final String line) {
		return parseLine(line, getOptions(), getMarkers(), null);
	}

	@Override
	public LeafletMapOptions getOptions() {
		return options;
	}

}