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1 files changed, 155 insertions, 0 deletions

diff --git a/libjava/classpath/java/awt/im/InputMethodRequests.java b/libjava/classpath/java/awt/im/InputMethodRequests.java
new file mode 100644
index 000000000..0423358cc
--- /dev/null
+++ b/libjava/classpath/java/awt/im/InputMethodRequests.java
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+/* InputMethodRequests.java -- handles text insertion via input methods
+   Copyright (C) 2002, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.awt.im;
+
+import java.awt.Component;
+import java.awt.Rectangle;
+import java.awt.font.TextHitInfo;
+import java.awt.event.InputMethodListener;
+import java.text.AttributedCharacterIterator;
+import java.text.AttributedCharacterIterator.Attribute;
+
+/**
+ * This interface handles requests made by input methods on text editing
+ * components. A component must specify a handler for input methods that
+ * implements this interface, and which supports one of two user interfaces:
+ * <ul><li><em>on-the-spot</em>: composed text is shown in place</li>
+ * <li><em>below-the-spot</em>: composed text is in a separate window,
+ * usually below the main text window, until it is committed into place at
+ * the insertion point, overwriting any selected text</li></ul>
+ *
+ * @author Eric Blake (ebb9@email.byu.edu)
+ * @see Component#getInputMethodRequests()
+ * @see InputMethodListener
+ * @since 1.2
+ * @status updated to 1.4
+ */
+public interface InputMethodRequests
+{
+  /**
+   * Gets the location of a given offset of the text. This can be used to
+   * position a composition window near the location of where the composed
+   * text will be inserted.
+   *
+   * <p>If the component has composed text (from the most recent
+   * InputMethodEvent), then offset 0 indicates the location of the first
+   * character of this composed text. Otherwise, the offset is ignored, and
+   * the location should be the beginning of the final line of selected
+   * text (in horizontal left-to-right text, like English, this would be the
+   * lower left corner of the selction; in vertical top-to-bottom text, like
+   * Chinese, this would be the top right corner of the selection).
+   *
+   * <p>The location returned is a 0-thickness caret (either horizontal or
+   * vertical, depending on text flow), mapped to absolute screen coordinates.
+   *
+   * @param offset offset within composed text, or null
+   * @return the screen location of the caret at the offset
+   */
+  Rectangle getTextLocation(TextHitInfo offset);
+
+  /**
+   * Get the text offset for the given screen coordinate. The offset is
+   * relative to the composed text, and the return is null if it is outside
+   * the range of composed text. For example, this can be used to find
+   * where a mouse click should pop up a text composition window.
+   *
+   * @param x the x screen coordinate
+   * @param y the y screen coordinate
+   * @return a text hit info describing the composed text offset
+   */
+  TextHitInfo getLocationOffset(int x, int y);
+
+  /**
+   * Gets the offset where the committed text exists in the text editing
+   * component. This can be used to examine the text surrounding the insert
+   * position.
+   *
+   * @return the offset of the insert position
+   */
+  int getInsertPositionOffset();
+
+  /**
+   * Gets an interator which provides access to the text and its attributes,
+   * except for the uncommitted text. The input method may provide a list of
+   * attributes it is interested in; and the iterator need not provide
+   * information on the remaining attributes. If the attribute list is null,
+   * the iterator must list all attributes.
+   *
+   * @param beginIndex the index of the first character in the iteration
+   * @param endIndex the index of the last character in the iteration
+   * @param attributes a list of attributes interested in, or null
+   * @return an iterator over the region of text with its attributes
+   */
+  AttributedCharacterIterator getCommittedText(int beginIndex, int endIndex,
+                                               Attribute[] attributes);
+
+  /**
+   * Gets the length of committed text.
+   *
+   * @return the number of committed characters
+   */
+  int getCommittedTextLength();
+
+  /**
+   * Gets the latest committed text, and removes it from the component's text
+   * body. This allows an input method to provide an "Undo" command. In
+   * general, this should only be supported immediately after a commit, and
+   * not when other actions intervene; if not supported, simply return null.
+   * The input method may provide a list of attributes it is interested in;
+   * and the iterator need not provide information on the remaining attributes.
+   * If the attribute list is null, the iterator must list all attributes.
+   *
+   * @param attributes a list of attributes interested in, or null
+   * @return the latest committed text, or null
+   */
+  AttributedCharacterIterator cancelLatestCommittedText
+    (Attribute[] attributes);
+
+  /**
+   * Gets the currently selected text. One use of this is to implement a
+   * "Reconvert" feature in an input method, which modifies the selection
+   * based on the text in the composition window. The input method may
+   * provide a list of attributes it is interested in; and the iterator need
+   * not provide information on the remaining attributes. If the attribute
+   * list is null, the iterator must list all attributes.
+   *
+   * @param attributes a list of attributes interested in, or null
+   * @return the current selection
+   */
+  AttributedCharacterIterator getSelectedText(Attribute[] attributes);
+} // interface InputMethodRequests