| /********************************************************************* |
| * Copyright (c) 2008 The University of York. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| **********************************************************************/ |
| package org.eclipse.epsilon.picto; |
| |
| import org.eclipse.swt.browser.Browser; |
| import org.eclipse.swt.graphics.Point; |
| |
| public class ViewRenderer { |
| |
| protected Browser browser; |
| protected double zoom = 1.0; |
| protected XmlHelper xmlHelper = new XmlHelper(); |
| |
| public ViewRenderer(Browser browser) { |
| this.browser = browser; |
| } |
| |
| public Browser getBrowser() { |
| return browser; |
| } |
| |
| public Point getScrollPosition() { |
| Double scrollX = (Double) browser.evaluate("return window.pageXOffset;"); |
| Double scrollY = (Double) browser.evaluate("return window.pageYOffset;"); |
| return new Point( |
| (scrollX != null) ? scrollX.intValue() : 0, |
| (scrollY != null) ? scrollY.intValue() : 0); |
| } |
| |
| public Point getPrintableArea() { |
| return new Point( |
| ((Double) browser.evaluate("return document.body.scrollWidth")).intValue(), |
| ((Double) browser.evaluate("return document.body.scrollHeight")).intValue() |
| ); |
| } |
| |
| public void setScrollPosition(Point point) { |
| browser.evaluate("window.scroll(" + point.x + ", " + point.y + ");"); |
| } |
| |
| public void zoom(ZoomType type) { |
| if (type == ZoomType.IN) zoom = Math.min(zoom + 0.1, 3.0); |
| else if (type == ZoomType.OUT) zoom = Math.max(0.1, zoom - 0.1); |
| else zoom = 1.0; |
| |
| browser.execute("javascript:document.body.style.zoom=" + zoom + ";"); |
| } |
| |
| public double getZoom() { |
| return zoom; |
| } |
| |
| public void display(Exception ex) { |
| display(getVerbatim(ex.getMessage())); |
| } |
| |
| public void display(String text) { |
| browser.setText(text.replace("${picto-zoom}", zoom + "")); |
| } |
| |
| public void nothingToRender() { |
| display(getHtml("")); |
| } |
| |
| public String getHtml(String content) { |
| return "<html><head></head><body>" + content + "</body></html>"; |
| } |
| |
| public String getVerbatim(String content) { |
| return getHtml("<pre>\n" + xmlHelper.escapeHtml(content) + "</pre>"); |
| } |
| |
| public enum ZoomType { |
| IN, |
| OUT, |
| ACTUAL |
| } |
| |
| } |
