[jbosstools-issues] [JBoss JIRA] (JBIDE-14320) JSPMultiPageEditor.getDocumentProvider().getDocument(input) returns null

[Vlado Pakan (JIRA)]

     [ https://issues.jboss.org/browse/JBIDE-14320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vlado Pakan closed JBIDE-14320.
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> JSPMultiPageEditor.getDocumentProvider().getDocument(input) returns null
> ------------------------------------------------------------------------
>
>                 Key: JBIDE-14320
>                 URL: https://issues.jboss.org/browse/JBIDE-14320
>             Project: Tools (JBoss Tools)
>          Issue Type: Bug
>          Components: browsersim, jsp/jsf/xml/html source editing
>    Affects Versions: 4.1.0.Beta1
>            Reporter: Yahor Radtsevich
>            Assignee: Victor Rubezhny
>             Fix For: 4.1.0.Beta1
>
>
> In BrowserSim we [use|https://github.com/jbosstools/jbosstools-vpe/blob/master/plugins/org.jboss.tools.vpe.browsersim.eclipse/src/org/jboss/tools/vpe/browsersim/eclipse/callbacks/ViewSourceCallback.java#L108] the following code to view the source code of currently opened page.
> This code opens a default html editor with given {{content}}.
> Everything is working fine, unless {{JSPMultiPageEditor}} is the default html editor.
> In the case with {{JSPMultiPageEditor}}, the method {{JSPMultiPageEditor.getDocumentProvider().getDocument(input)}} returns {{null}} and blanck editor is shown.
> {code}
> private void openInMemoryHtmlEditor(String content, String name, String toolTip) {
> 	IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
> 	IWorkbenchPage page = window != null ? window.getActivePage() : null;
> 	if (page != null) {
> 		try {
> 			IEditorDescriptor editorDescriptor = PlatformUI.getWorkbench()
> 					.getEditorRegistry().getDefaultEditor("view-source.html"); // get default editor for .html //$NON-NLS-1$
> 			String editorId;
> 			if (editorDescriptor != null && editorDescriptor.isInternal()) {
> 				editorId = editorDescriptor.getId();
> 			} else {
> 				editorId = "org.eclipse.ui.DefaultTextEditor"; //$NON-NLS-1$
> 			}
> 			IStorage storage = new StringStorage("", // see the long comment below to know why an empty storage is created //$NON-NLS-1$
> 					"view-source.html"); // .html extension is needed to enable code highlighting in the WTP HTML editor //$NON-NLS-1$
> 			IStorageEditorInput input = new StringInput(storage, name, toolTip);
> 			IEditorPart editor = page.openEditor(input, editorId);
> 			
> 			/* We change content of the editor AFTER the editor is created
> 			 * as a workaround for the following WTP bug.
> 			 * The essence of the bug is that if given HTML page contains a link
> 			 * to an external DTD, then WTP HTML editor tries to access this DTD before the editor
> 			 * is created and freezes UI.
> 			 * See http://www.eclipse.org/forums/index.php/m/639937/
> 			 */
> 			IDocument doc = null;
> 			ITextEditor textEditor = null;
> 			if (editor instanceof ITextEditor) {
> 				textEditor = (ITextEditor) editor;
> 			} else {
> 				textEditor = (ITextEditor) editor.getAdapter(ITextEditor.class);
> 			}
> 			
> 			if (textEditor != null) {
> 				doc = textEditor.getDocumentProvider().getDocument(input);// <<<<----- THE PROBLEM APPEARS HERE
> 			}
> 			if (doc != null) {
> 				doc.set(content);
> 				editor.doSave(null); // reset resource-changed marker
> 			}
> 		} catch (PartInitException e) {
> 			Activator.logError(e.getMessage(), e);
> 		}
> 	} else {
> 		Activator.logError("Cannot obtain workbench page", null);
> 	}
> }
> {code}

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