diff options
Diffstat (limited to 'propertysheet/src/org/eclipse/wb/internal/core/model/property/table/HtmlTooltipHelper.java')
| -rw-r--r-- | propertysheet/src/org/eclipse/wb/internal/core/model/property/table/HtmlTooltipHelper.java | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/propertysheet/src/org/eclipse/wb/internal/core/model/property/table/HtmlTooltipHelper.java b/propertysheet/src/org/eclipse/wb/internal/core/model/property/table/HtmlTooltipHelper.java deleted file mode 100644 index 5e05549..0000000 --- a/propertysheet/src/org/eclipse/wb/internal/core/model/property/table/HtmlTooltipHelper.java +++ /dev/null @@ -1,332 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2011 Google, Inc. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * Google, Inc. - initial API and implementation - *******************************************************************************/ -package org.eclipse.wb.internal.core.model.property.table; - -import com.google.common.base.Charsets; -import com.google.common.base.Joiner; - -import org.eclipse.swt.SWT; -import org.eclipse.swt.browser.Browser; -import org.eclipse.swt.browser.LocationAdapter; -import org.eclipse.swt.browser.LocationEvent; -import org.eclipse.swt.browser.ProgressAdapter; -import org.eclipse.swt.browser.ProgressEvent; -import org.eclipse.swt.graphics.Color; -import org.eclipse.swt.graphics.Point; -import org.eclipse.swt.widgets.Composite; -import org.eclipse.swt.widgets.Control; -import org.eclipse.swt.widgets.Event; -import org.eclipse.swt.widgets.Label; -import org.eclipse.swt.widgets.Listener; -import org.eclipse.swt.widgets.Shell; -import org.eclipse.ui.PlatformUI; -import org.eclipse.ui.browser.IWebBrowser; -import org.eclipse.ui.browser.IWorkbenchBrowserSupport; -import org.eclipse.wb.draw2d.IColorConstants; -import org.eclipse.wb.internal.core.DesignerPlugin; -import org.eclipse.wb.internal.core.EnvironmentUtils; -import org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils; -import org.eclipse.wb.internal.core.utils.ui.GridDataFactory; -import org.eclipse.wb.internal.core.utils.ui.PixelConverter; - -import java.io.StringReader; -import java.net.URL; -import java.text.MessageFormat; - -/** - * Helper for displaying HTML tooltips. - * - * @author scheglov_ke - * @coverage core.model.property.table - */ -public final class HtmlTooltipHelper { - public static Control createTooltipControl(Composite parent, String header, String details) { - return createTooltipControl(parent, header, details, 0); - } - - public static Control createTooltipControl(Composite parent, - String header, - String details, - int heightLimit) { - // prepare Control - Control control; - try { - String html = "<table cellspacing=2 cellpadding=0 border=0 margins=0 id=_wbp_tooltip_body>"; - if (header != null) { - html += "<tr align=center><td><b>" + header + "</b></td></tr>"; - } - html += "<tr><td align=justify>" + details + "</td></tr>"; - html += "</table>"; - control = createTooltipControl_Browser(parent, html, heightLimit); - } catch (Throwable e) { - control = createTooltipControl_Label(parent, details); - } - // set listeners - { - Listener listener = new Listener() { - @Override - public void handleEvent(Event event) { - Control tooltipControl = (Control) event.widget; - hideTooltip(tooltipControl); - } - }; - control.addListener(SWT.MouseExit, listener); - } - // done - return control; - } - - /** - * Creates {@link Browser} for displaying tooltip. - */ - private static Control createTooltipControl_Browser(Composite parent, - String html, - final int heightLimitChars) { - // prepare styles - String styles; - try { - styles = DesignerPlugin.readFile(PropertyTable.class.getResourceAsStream("Tooltip.css"), - Charsets.US_ASCII); - if (styles == null) { - styles = ""; - } - } catch (Throwable e) { - styles = ""; - } - // prepare HTML with styles and tags - String wrappedHtml; - { - String bodyAttributes = - MessageFormat.format( - "text=''{0}'' bgcolor=''{1}''", - getColorWebString(IColorConstants.tooltipForeground), - getColorWebString(IColorConstants.tooltipBackground)); - String closeElement = - EnvironmentUtils.IS_LINUX - ? " <a href='' style='position:absolute;right:1em;' id=_wbp_close>Close</a>" - : ""; - wrappedHtml = - /*CodeUtils.*/getSource( - "<html>", - " <style CHARSET='ISO-8859-1' TYPE='text/css'>", - styles, - " </style>", - " <body " + bodyAttributes + ">", - closeElement, - html, - " </body>", - "</html>"); - } - // prepare Browser - final Browser browser = new Browser(parent, SWT.NONE); - browser.setText(wrappedHtml); - // open URLs in new window - browser.addLocationListener(new LocationAdapter() { - @Override - public void changing(LocationEvent event) { - event.doit = false; - hideTooltip((Browser) event.widget); - if (!"about:blank".equals(event.location)) { - try { - IWorkbenchBrowserSupport support = PlatformUI.getWorkbench().getBrowserSupport(); - IWebBrowser browserSupport = support.createBrowser("wbp.browser"); - browserSupport.openURL(new URL(event.location)); - } catch (Throwable e) { - DesignerPlugin.log(e); - } - } - } - }); - // set size - { - int textLength = getTextLength(html); - // horizontal hint - int hintH = 50; - if (textLength < 100) { - hintH = 40; - } - // vertical hint - int hintV = textLength / hintH + 3; - hintV = Math.min(hintV, 8); - // do set - GridDataFactory.create(browser).hintC(hintH, hintV); - } - // tweak size after rendering HTML - browser.addProgressListener(new ProgressAdapter() { - @Override - public void completed(ProgressEvent event) { - browser.removeProgressListener(this); - tweakBrowserSize(browser, heightLimitChars); - browser.getShell().setVisible(true); - } - }); - // done - return browser; - } - - private static void tweakBrowserSize(Browser browser, int heightLimitChars) { - GridDataFactory.create(browser).grab().fill(); - // limit height - if (heightLimitChars != 0) { - PixelConverter pixelConverter = new PixelConverter(browser); - int maxHeight = pixelConverter.convertHeightInCharsToPixels(heightLimitChars); - expandShellToShowFullPage_Height(browser, maxHeight); - } - // if no limit, then show all, so make as tall as required - if (heightLimitChars == 0) { - expandShellToShowFullPage_Height(browser, Integer.MAX_VALUE); - } - } - - private static void expandShellToShowFullPage_Height(Browser browser, int maxHeight) { - try { - Shell shell = browser.getShell(); - // calculate required - int contentHeight; - { - getContentOffsetHeight(browser); - contentHeight = getContentScrollHeight(browser); - } - // apply height - int useHeight = Math.min(contentHeight + ((EnvironmentUtils.IS_LINUX) ? 2 : 10), maxHeight); - shell.setSize(shell.getSize().x, useHeight); - // trim height to content - { - int offsetHeight = getBodyOffsetHeight(browser); - int scrollHeight = getBodyScrollHeight(browser); - int delta = scrollHeight - offsetHeight; - if (delta != 0 && delta < 10) { - Point size = shell.getSize(); - shell.setSize(size.x, size.y + delta + 1); - } - } - // trim width to content - { - int offsetWidth = getContentOffsetWidth(browser); - { - Point size = shell.getSize(); - shell.setSize(offsetWidth + ((EnvironmentUtils.IS_MAC) ? 6 : 10), size.y); - } - } - // hide 'Close' if too narrow - if (EnvironmentUtils.IS_LINUX) { - if (shell.getSize().y < 30) { - hideCloseElement(browser); - } - } - } catch (Throwable e) { - } - } - - private static int getContentOffsetWidth(Browser browser) throws Exception { - return evaluateScriptInt( - browser, - "return document.getElementById('_wbp_tooltip_body').offsetWidth;"); - } - - private static int getContentOffsetHeight(Browser browser) throws Exception { - return evaluateScriptInt( - browser, - "return document.getElementById('_wbp_tooltip_body').offsetHeight;"); - } - - private static int getContentScrollHeight(Browser browser) throws Exception { - return evaluateScriptInt( - browser, - "return document.getElementById('_wbp_tooltip_body').scrollHeight;"); - } - - private static int getBodyOffsetHeight(Browser browser) throws Exception { - return evaluateScriptInt(browser, "return document.body.offsetHeight;"); - } - - private static int getBodyScrollHeight(Browser browser) throws Exception { - return evaluateScriptInt(browser, "return document.body.scrollHeight;"); - } - - private static int evaluateScriptInt(Browser browser, String script) throws Exception { - Object o = ReflectionUtils.invokeMethod(browser, "evaluate(java.lang.String)", script); - return ((Number) o).intValue(); - } - - private static void hideCloseElement(Browser browser) throws Exception { - String script = "document.getElementById('_wbp_close').style.display = 'none'"; - ReflectionUtils.invokeMethod(browser, "evaluate(java.lang.String)", script); - } - - /** - * @return the length of text in given HTML. Uses internal class, so may fail, in this case - * returns length on HTML. - */ - private static int getTextLength(String html) { - StringReader htmlStringReader = new StringReader(html); - try { - ClassLoader classLoader = PropertyTable.class.getClassLoader(); - Class<?> readerClass = - classLoader.loadClass("org.eclipse.jface.internal.text.html.HTML2TextReader"); - Object reader = readerClass.getConstructors()[0].newInstance(htmlStringReader, null); - String text = (String) ReflectionUtils.invokeMethod(reader, "getString()"); - return text.length(); - } catch (Throwable e) { - return html.length(); - } - } - - /** - * Returns a string representation of {@link Color} suitable for web pages. - * - * @param color - * the {@link Color} instance, not <code>null</code>. - * @return a string representation of {@link Color} suitable for web pages. - */ - private static String getColorWebString(final Color color) { - String colorString = "#" + Integer.toHexString(color.getRed()); - colorString += Integer.toHexString(color.getGreen()); - colorString += Integer.toHexString(color.getBlue()); - return colorString; - } - - /** - * Creates {@link Label} if {@link Browser} can not be used. - */ - private static Control createTooltipControl_Label(Composite parent, String html) { - // prepare Label - final Label label = new Label(parent, SWT.WRAP); - label.setText(html); - // set size - int requiredWidth = label.computeSize(SWT.DEFAULT, SWT.DEFAULT).x; - GridDataFactory.create(label).hintHC(50).hintHMin(requiredWidth); - // copy colors - label.setForeground(parent.getForeground()); - label.setBackground(parent.getBackground()); - // done - parent.getDisplay().asyncExec(new Runnable() { - @Override - public void run() { - Shell shell = label.getShell(); - shell.setVisible(true); - } - }); - return label; - } - - private static void hideTooltip(Control tooltip) { - tooltip.getShell().dispose(); - } - - // Copied from CodeUtils.java: CodeUtils.getSource() - /** - * @return the source as single {@link String}, lines joined using "\n". - */ - public static String getSource(String... lines) { - return Joiner.on('\n').join(lines); - } -} |