Examples of org.eclipse.core.commands.contexts.Context

Package org.eclipse.core.commands.contexts

Examples of org.eclipse.core.commands.contexts.Context

org.eclipse.core.commands.contexts.Context

A context is an answer to the question "when". Other services can listen for the activation and deactivation of contexts, and change their own state in response to these changes. For example, Eclipse's key binding service listens to context activation and deactivation to determine which key bindings should be active.

An instance of this interface can be obtained from an instance of ContextManager for any identifier, whether or not an context with that identifier is defined in the extension registry.

The handle-based nature of this API allows it to work well with runtime plugin activation and deactivation. If a context is defined, that means that its corresponding plug-in is active. If the plug-in is then deactivated, the context will still exist but it will be undefined. An attempts to use an undefined context will result in a NotDefinedException being thrown.

This class is not intended to be extended by clients.
@since 3.1 @see ContextManager

        if (contextTree.containsKey(childContextId)) {
          break;
        }


        // Retrieve the context.
        final Context childContext = contextManager
            .getContext(childContextId);


        // Add the child-parent pair to the tree.
        try {
          final String parentContextId = childContext.getParentId();
          contextTree.put(childContextId, parentContextId);
          childContextId = parentContextId;
        } catch (final NotDefinedException e) {
          break; // stop ascending
        }

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     * active.
     */
    contextIdItr = contextIds.iterator();
    while (contextIdItr.hasNext()) {
      String contextId = (String) contextIdItr.next();
      Context context = contextManager.getContext(contextId);
      try {
        String parentId = context.getParentId();
        while (parentId != null) {
          if (IContextIds.CONTEXT_ID_DIALOG.equals(parentId)) {
            if (!dialog) {
              contextIdItr.remove();
            }
            break;
          }
          if (IContextIds.CONTEXT_ID_WINDOW.equals(parentId)) {
            if (!window) {
              contextIdItr.remove();
            }
            break;
          }
          if (IContextIds.CONTEXT_ID_DIALOG_AND_WINDOW
              .equals(parentId)) {
            if ((!window) && (!dialog)) {
              contextIdItr.remove();
            }
            break;
          }


          context = contextManager.getContext(parentId);
          parentId = context.getParentId();
        }
      } catch (NotDefinedException e) {
        // since this context was part of an undefined hierarchy,
        // I'm going to yank it out as a bad bet
        contextIdItr.remove();


        // This is a logging optimization, only log the error once.
        if (context == null || !bindingErrors.contains(context.getId())) {
          if (context != null) {
            bindingErrors.add(context.getId());
          }


          // now log like you've never logged before!
          Policy
              .getLog()

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  /**
   * @param bindingTable
   */
  private void defineBindingTable(MBindingTable bindingTable) {
    final Context bindingContext = contextManager.getContext(bindingTable
        .getBindingContext().getElementId());
    BindingTable table = bindingTables.getTable(bindingTable
        .getBindingContext().getElementId());
    if (table == null) {
      table = new BindingTable(bindingContext);

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    if (parentObj == null) {
      return;
    }


    MBindingTable bt = (MBindingTable) parentObj;
    final Context bindingContext = contextManager.getContext(bt
        .getBindingContext().getElementId());
    BindingTable table = bindingTables.getTable(bindingContext.getId());
    if (table == null) {
      logger.error("Trying to create \'" + binding //$NON-NLS-1$
          + "\' without binding table " + bindingContext.getId());//$NON-NLS-1$
      return;
    }
    Binding keyBinding = createBinding(bindingContext,
        binding.getCommand(), binding.getParameters(),
        binding.getKeySequence(), binding);

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              .getProperty(UIEvents.EventTags.NEW_VALUE);
          if (UIEvents.EventTypes.ADD.equals(event
              .getProperty(UIEvents.EventTags.TYPE))
              && newObj instanceof MBindingTable) {
            MBindingTable bt = (MBindingTable) newObj;
            final Context bindingContext = contextManager
                .getContext(bt.getBindingContext()
                    .getElementId());
            final BindingTable table = new BindingTable(
                bindingContext);
            bindingTables.addTable(table);

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    Binding result = null;
    Binding currentResult = null;
    List<Context> contexts = contextSet.getContexts();
    ListIterator<Context> it = contexts.listIterator(contexts.size());
    while (it.hasPrevious()) {
      Context c = it.previous();
      BindingTable table = getTable(c.getId());
      if (table != null) {
        currentResult = table.getPerfectMatch(triggerSequence);
      }
      if (currentResult != null) {
        if (isMostActiveScheme(currentResult)) {

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      ParameterizedCommand parameterizedCommand) {
    ArrayList<Binding> bindings = new ArrayList<Binding>();
    List<Context> contexts = contextSet.getContexts();
    ListIterator<Context> it = contexts.listIterator(contexts.size());
    while (it.hasPrevious()) {
      Context c = it.previous();
      BindingTable table = getTable(c.getId());
      if (table != null) {
        Collection<Binding> sequences = table.getSequencesFor(parameterizedCommand);
        if (sequences != null) {
          bindings.addAll(sequences);
        }

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  public boolean isPartialMatch(ContextSet contextSet, TriggerSequence sequence) {
    List<Context> contexts = contextSet.getContexts();
    ListIterator<Context> it = contexts.listIterator(contexts.size());
    while (it.hasPrevious()) {
      Context c = it.previous();
      BindingTable table = getTable(c.getId());
      if (table != null) {
        if (table.isPartialMatch(sequence)) {
          return true;
        }
      }

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  public Collection<Binding> getPartialMatches(ContextSet contextSet, TriggerSequence sequence) {
    ArrayList<Binding> bindings = new ArrayList<Binding>();
    List<Context> contexts = contextSet.getContexts();
    ListIterator<Context> it = contexts.listIterator(contexts.size());
    while (it.hasPrevious()) {
      Context c = it.previous();
      BindingTable table = getTable(c.getId());
      if (table != null) {
        Collection<Binding> partialMatches = table.getPartialMatches(sequence);
        if (partialMatches != null) {
          bindings.addAll(partialMatches);
        }

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      int l = 0;
      try {
        String parentId = c.getParentId();
        while (parentId != null) {
          l++;
          Context context = manager.getContext(parentId);
          parentId = context.getParentId();
        }
      } catch (NotDefinedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }

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