org.rstudio.core.client.SafeHtmlUtil.java Source code

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Here is the source code for org.rstudio.core.client.SafeHtmlUtil.java

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/*
 * SafeHtmlUtil.java
 *
 * Copyright (C) 2009-12 by RStudio, Inc.
 *
 * Unless you have received this program directly from RStudio pursuant
 * to the terms of a commercial license agreement with RStudio, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
package org.rstudio.core.client;

import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;

public class SafeHtmlUtil {
    public static void appendDiv(SafeHtmlBuilder sb, String style, String textContent) {
        sb.append(createOpenTag("div", "class", style));
        sb.appendEscaped(textContent);
        sb.appendHtmlConstant("</div>");
    }

    public static void appendDiv(SafeHtmlBuilder sb, String style, SafeHtml htmlContent) {
        sb.append(createOpenTag("div", "class", style));
        sb.append(htmlContent);
        sb.appendHtmlConstant("</div>");
    }

    public static void appendSpan(SafeHtmlBuilder sb, String style, String textContent) {
        sb.append(SafeHtmlUtil.createOpenTag("span", "class", style));
        sb.appendEscaped(textContent);
        sb.appendHtmlConstant("</span>");
    }

    public static void appendSpan(SafeHtmlBuilder sb, String style, SafeHtml htmlContent) {
        sb.append(SafeHtmlUtil.createOpenTag("span", "class", style));
        sb.append(htmlContent);
        sb.appendHtmlConstant("</span>");
    }

    public static void appendImage(SafeHtmlBuilder sb, String style, ImageResource image) {
        sb.append(SafeHtmlUtil.createOpenTag("img", "class", style, "src", image.getSafeUri().asString()));
        sb.appendHtmlConstant("</img>");
    }

    public static SafeHtml createOpenTag(String tagName, String... attribs) {
        StringBuilder builder = new StringBuilder();
        builder.append("<").append(tagName);
        for (int i = 0; i < attribs.length; i += 2) {
            builder.append(' ').append(SafeHtmlUtils.htmlEscape(attribs[i])).append("=\"")
                    .append(SafeHtmlUtils.htmlEscape(attribs[i + 1])).append("\"");
        }
        builder.append(">");
        return SafeHtmlUtils.fromTrustedString(builder.toString());
    }

    public static SafeHtml createEmpty() {
        return SafeHtmlUtils.fromSafeConstant("");
    }

    public static SafeHtml concat(SafeHtml... pieces) {
        StringBuilder builder = new StringBuilder();
        for (SafeHtml piece : pieces) {
            if (piece != null)
                builder.append(piece.asString());
        }
        return SafeHtmlUtils.fromTrustedString(builder.toString());
    }
}