Examples of org.eclipse.ui.texteditor.IDocumentProvider

org.eclipse.ui.texteditor.IDocumentProvider
A document provider maps between domain elements and documents. A document provider has the following responsibilities:
- create an annotation model of a domain model element
- create and manage a textual representation, i.e., a document, of a domain model element
- create and save the content of domain model elements based on given documents
- update the documents this document provider manages for domain model elements to changes directly applied to those domain model elements
- notify all element state listeners about changes directly applied to domain model elements this document provider manages a document for, i.e. the document provider must know which changes of a domain model element are to be interpreted as element moves, deletes, etc.
Text editors use document providers to bridge the gap between their input elements and the documents they work on. A single document provider may be shared between multiple editors; the methods take the editors' input elements as a parameter.
This interface may be implemented by clients; or subclass the standard abstract base class AbstractDocumentProvider.

In order to provided backward compatibility for clients of IDocumentProvider, extension interfaces are used to provide a means of evolution. The following extension interfaces exist:
- {@link org.eclipse.ui.texteditor.IDocumentProviderExtension} since version 2.0 introducingstate validation, extended read-only handling and synchronization.
- {@link org.eclipse.ui.texteditor.IDocumentProviderExtension2} since version 2.1 introducingadding support for a global progress monitor.
- {@link org.eclipse.ui.texteditor.IDocumentProviderExtension3} since version 3.0 addinga predicate for querying synchronization state.
- {@link org.eclipse.ui.texteditor.IDocumentProviderExtension4} since version 3.1 addinga predicate for querying an element's the content description.
- {@link org.eclipse.ui.texteditor.IDocumentProviderExtension5} since version 3.2 addingthe ability to detect a non-synchronized exception.
@see org.eclipse.jface.text.IDocument @see org.eclipse.ui.texteditor.AbstractDocumentProvider @see org.eclipse.ui.texteditor.IDocumentProviderExtension @see org.eclipse.ui.texteditor.IDocumentProviderExtension2 @see org.eclipse.ui.texteditor.IDocumentProviderExtension3 @see org.eclipse.ui.texteditor.IDocumentProviderExtension4 @see org.eclipse.ui.texteditor.IDocumentProviderExtension5


  /**
   * Removes the annotations.
   */
  private void removeAnnotations() {
    final IDocumentProvider docProvider = fEditor.getDocumentProvider();


    if (docProvider == null) {
      return;
    }


    IAnnotationModel model = docProvider.getAnnotationModel(fEditor
        .getEditorInput());


    if (model == null)
      return;

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          IEditorPart editor = IDE.openEditor(page, cexFile); 


          if (editor instanceof ITextEditor) {
            ITextEditor textEditor = (ITextEditor) editor;


            IDocumentProvider documentProvider = 
              textEditor.getDocumentProvider();
            IDocument document = 
              documentProvider.getDocument(editor.getEditorInput());


            FindReplaceDocumentAdapter searchAdapter = 
              new FindReplaceDocumentAdapter(document);


            try {

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   *             getExistingModelFor*(IDocument). Supported document
   *             providers ensure that the document maps to a shared
   *             structured model.
   */
  public IStructuredModel getModel() {
    IDocumentProvider documentProvider = getDocumentProvider();
    
    if (documentProvider == null) {
      // this indicated an error in startup sequence
      Logger.trace(getClass().getName(), "Program Info Only: document provider was null when model requested"); //$NON-NLS-1$ //$NON-NLS-2$
    }
    
    // Remember if we entered this method without a model existing
    boolean initialModelNull = (fStructuredModel == null);
    
    if (fStructuredModel == null && documentProvider != null) {
      // lazily set the model instance, although this is an ABNORMAL
      // CODE PATH
      if (documentProvider instanceof IModelProvider) {
        fStructuredModel = ((IModelProvider) documentProvider).getModel(getEditorInput());
        fisReleased = false;
      }
      else {
        IDocument doc = documentProvider.getDocument(getEditorInput());
        if (doc instanceof IStructuredDocument) {
          /*
           * Called in this manner because getExistingModel can skip
           * some calculations always performed in getModelForEdit
           */

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    IResource resource = ResourceUtil.getResource(input);
    if(resource != null) {
        resource.getWorkspace().addResourceChangeListener(this);
    }


    final IDocumentProvider docProvider = sourcePage.getDocumentProvider();
    IDocument document = docProvider.getDocument(input);
    try {
      model.loadFrom(document);
    } catch (IOException e) {
      throw new PartInitException("Error reading editor input.", e);
    }
    
    // Ensure the field values are updated if the file content is replaced
        docProvider.addElementStateListener(new IElementStateListener() {
            public void elementMoved(Object originalElement, Object movedElement) {
            }


            public void elementDirtyStateChanged(Object element, boolean isDirty) {
            }


            public void elementDeleted(Object element) {
            }


            public void elementContentReplaced(Object element) {
                try {
                    System.out.println("--> Content Replaced");
                    model.loadFrom(docProvider.getDocument(element));
                } catch (IOException e) {
                  e.printStackTrace();
                }
            }

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    formEditor.getReportModel().saveChangesTo(document);
    stale = false;
  }


  private IDocument getDocument() {
    IDocumentProvider docProvider = getDocumentProvider();
    IEditorInput input = getEditorInput();
    IDocument doc = docProvider.getDocument(input);
    return doc;
  }

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                    FileActivity.created(user, path, Purpose.RECOVERY));


                // Immediately follow up with a new checksum
                IDocument doc;
                FileEditorInput input = new FileEditorInput(file);
                IDocumentProvider provider = EditorManager
                    .getDocumentProvider(input);
                try {
                    provider.connect(input);
                    doc = provider.getDocument(input);


                    final DocumentChecksum checksum = new DocumentChecksum(path);
                    checksum.bind(doc);
                    checksum.update();
                    Utils.runSafeSWTSync(log, new Runnable() {
                        public void run() {
                            sarosSession.activityCreated(new ChecksumActivity(
                                user, path, checksum.getHash(), checksum
                                    .getLength()));
                        }
                    });
                } catch (CoreException e) {
                    log.warn("Could not check checksum of file "
                        + path.toString());
                } finally {
                    provider.disconnect(input);
                }


            } catch (IOException e) {
                log.error("File could not be read, despite existing: " + path,
                    e);

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        this.editorManager.editorAPI.addSharedEditorListener(
            this.editorManager, editorPart);
        this.editorManager.editorAPI.setEditable(editorPart,
            this.editorManager.hasWriteAccess);


        IDocumentProvider documentProvider = EditorManager
            .getDocumentProvider(input);


        // TODO Not registering is very helpful to find errors related to file
        // transfer problems
        // this.editorManager.dirtyStateListener.register(documentProvider,

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        // Unregister and unhook
        this.editorManager.editorAPI.setEditable(editorPart, true);
        this.editorManager.editorAPI.removeSharedEditorListener(
            this.editorManager, editorPart);


        IDocumentProvider documentProvider = EditorManager
            .getDocumentProvider(input);
        // this.editorManager.dirtyStateListener.unregister(documentProvider,
        // input);


        IDocument document = documentProvider.getDocument(input);
        if (document == null) {
            log.warn("Could not disconnect from document: " + path);
        } else {
            document
                .removeDocumentListener(this.editorManager.documentListener);

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                + " is not available locally: " + path, new StackTrace());
            return;
        }


        FileEditorInput input = new FileEditorInput(file);
        IDocumentProvider provider = EditorManager.getDocumentProvider(input);
        try {
            provider.connect(input);
        } catch (CoreException e) {
            log.error("Could not connect to a document provider on file '"
                + file.toString() + "':", e);
            return;
        }

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        connectedUserWithWriteAccessFiles.remove(path);


        IFile file = path.getFile();
        FileEditorInput input = new FileEditorInput(file);
        IDocumentProvider provider = EditorManager.getDocumentProvider(input);
        provider.disconnect(input);
    }

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