183 lines
7.0 KiB
Java
183 lines
7.0 KiB
Java
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.text;
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/**
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* This is the interface for text that has markup objects attached to
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* ranges of it. Not all text classes have mutable markup or text;
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* see {@link Spannable} for mutable markup and {@link Editable} for
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* mutable text.
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*/
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public interface Spanned
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extends CharSequence
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{
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/**
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* Bitmask of bits that are relevent for controlling point/mark behavior
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* of spans.
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*/
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public static final int SPAN_POINT_MARK_MASK = 0x33;
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/**
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* 0-length spans with type SPAN_MARK_MARK behave like text marks:
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* they remain at their original offset when text is inserted
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* at that offset.
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*/
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public static final int SPAN_MARK_MARK = 0x11;
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/**
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* SPAN_MARK_POINT is a synonym for {@link #SPAN_INCLUSIVE_INCLUSIVE}.
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*/
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public static final int SPAN_MARK_POINT = 0x12;
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/**
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* SPAN_POINT_MARK is a synonym for {@link #SPAN_EXCLUSIVE_EXCLUSIVE}.
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*/
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public static final int SPAN_POINT_MARK = 0x21;
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/**
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* 0-length spans with type SPAN_POINT_POINT behave like cursors:
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* they are pushed forward by the length of the insertion when text
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* is inserted at their offset.
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*/
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public static final int SPAN_POINT_POINT = 0x22;
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/**
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* SPAN_PARAGRAPH behaves like SPAN_INCLUSIVE_EXCLUSIVE
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* (SPAN_MARK_MARK), except that if either end of the span is
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* at the end of the buffer, that end behaves like _POINT
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* instead (so SPAN_INCLUSIVE_INCLUSIVE if it starts in the
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* middle and ends at the end, or SPAN_EXCLUSIVE_INCLUSIVE
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* if it both starts and ends at the end).
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* <p>
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* Its endpoints must be the start or end of the buffer or
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* immediately after a \n character, and if the \n
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* that anchors it is deleted, the endpoint is pulled to the
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* next \n that follows in the buffer (or to the end of
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* the buffer).
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*/
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public static final int SPAN_PARAGRAPH = 0x33;
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/**
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* Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand
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* to include text inserted at their starting point but not at their
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* ending point. When 0-length, they behave like marks.
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*/
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public static final int SPAN_INCLUSIVE_EXCLUSIVE = SPAN_MARK_MARK;
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/**
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* Spans of type SPAN_INCLUSIVE_INCLUSIVE expand
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* to include text inserted at either their starting or ending point.
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*/
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public static final int SPAN_INCLUSIVE_INCLUSIVE = SPAN_MARK_POINT;
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/**
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* Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand
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* to include text inserted at either their starting or ending point.
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* They can never have a length of 0 and are automatically removed
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* from the buffer if all the text they cover is removed.
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*/
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public static final int SPAN_EXCLUSIVE_EXCLUSIVE = SPAN_POINT_MARK;
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/**
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* Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand
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* to include text inserted at their ending point but not at their
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* starting point. When 0-length, they behave like points.
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*/
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public static final int SPAN_EXCLUSIVE_INCLUSIVE = SPAN_POINT_POINT;
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/**
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* This flag is set on spans that are being used to apply temporary
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* styling information on the composing text of an input method, so that
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* they can be found and removed when the composing text is being
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* replaced.
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*/
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public static final int SPAN_COMPOSING = 0x100;
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/**
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* This flag will be set for intermediate span changes, meaning there
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* is guaranteed to be another change following it. Typically it is
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* used for {@link Selection} which automatically uses this with the first
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* offset it sets when updating the selection.
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*/
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public static final int SPAN_INTERMEDIATE = 0x200;
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/**
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* The bits numbered SPAN_USER_SHIFT and above are available
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* for callers to use to store scalar data associated with their
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* span object.
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*/
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public static final int SPAN_USER_SHIFT = 24;
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/**
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* The bits specified by the SPAN_USER bitfield are available
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* for callers to use to store scalar data associated with their
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* span object.
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*/
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public static final int SPAN_USER = 0xFFFFFFFF << SPAN_USER_SHIFT;
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/**
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* The bits numbered just above SPAN_PRIORITY_SHIFT determine the order
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* of change notifications -- higher numbers go first. You probably
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* don't need to set this; it is used so that when text changes, the
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* text layout gets the chance to update itself before any other
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* callbacks can inquire about the layout of the text.
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*/
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public static final int SPAN_PRIORITY_SHIFT = 16;
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/**
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* The bits specified by the SPAN_PRIORITY bitmap determine the order
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* of change notifications -- higher numbers go first. You probably
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* don't need to set this; it is used so that when text changes, the
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* text layout gets the chance to update itself before any other
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* callbacks can inquire about the layout of the text.
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*/
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public static final int SPAN_PRIORITY = 0xFF << SPAN_PRIORITY_SHIFT;
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/**
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* Return an array of the markup objects attached to the specified
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* slice of this CharSequence and whose type is the specified type
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* or a subclass of it. Specify Object.class for the type if you
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* want all the objects regardless of type.
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*/
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public <T> T[] getSpans(int start, int end, Class<T> type);
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/**
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* Return the beginning of the range of text to which the specified
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* markup object is attached, or -1 if the object is not attached.
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*/
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public int getSpanStart(Object tag);
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/**
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* Return the end of the range of text to which the specified
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* markup object is attached, or -1 if the object is not attached.
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*/
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public int getSpanEnd(Object tag);
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/**
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* Return the flags that were specified when {@link Spannable#setSpan} was
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* used to attach the specified markup object, or 0 if the specified
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* object has not been attached.
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*/
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public int getSpanFlags(Object tag);
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/**
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* Return the first offset greater than or equal to <code>start</code>
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* where a markup object of class <code>type</code> begins or ends,
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* or <code>limit</code> if there are no starts or ends greater than or
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* equal to <code>start</code> but less than <code>limit</code>. Specify
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* <code>null</code> or Object.class for the type if you want every
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* transition regardless of type.
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*/
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public int nextSpanTransition(int start, int limit, Class type);
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}
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