org.snapscript.dx.util.AnnotatedOutput Maven / Gradle / Ivy
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.snapscript.dx.util;
/**
* Interface for a binary output destination that may be augmented
* with textual annotations.
*/
public interface AnnotatedOutput
extends Output {
/**
* Get whether this instance will actually keep annotations.
*
* @return {@code true} iff annotations are being kept
*/
public boolean annotates();
/**
* Get whether this instance is intended to keep verbose annotations.
* Annotators may use the result of calling this method to inform their
* annotation activity.
*
* @return {@code true} iff annotations are to be verbose
*/
public boolean isVerbose();
/**
* Add an annotation for the subsequent output. Any previously
* open annotation will be closed by this call, and the new
* annotation marks all subsequent output until another annotation
* call.
*
* @param msg {@code non-null;} the annotation message
*/
public void annotate(String msg);
/**
* Add an annotation for a specified amount of subsequent
* output. Any previously open annotation will be closed by this
* call. If there is already pending annotation from one or more
* previous calls to this method, the new call "consumes" output
* after all the output covered by the previous calls.
*
* @param amt {@code >= 0;} the amount of output for this annotation to
* cover
* @param msg {@code non-null;} the annotation message
*/
public void annotate(int amt, String msg);
/**
* End the most recent annotation. Subsequent output will be unannotated,
* until the next call to {@link #annotate}.
*/
public void endAnnotation();
/**
* Get the maximum width of the annotated output. This is advisory:
* Implementations of this interface are encouraged to deal with too-wide
* output, but annotaters are encouraged to attempt to avoid exceeding
* the indicated width.
*
* @return {@code >= 1;} the maximum width
*/
public int getAnnotationWidth();
}