| /* |
| * Copyright (C) 2007-2008 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 android.view.inputmethod; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.view.KeyCharacterMap; |
| import android.view.KeyEvent; |
| |
| /** |
| * The InputConnection interface is the communication channel from an |
| * {@link InputMethod} back to the application that is receiving its |
| * input. It is used to perform such things as reading text around the |
| * cursor, committing text to the text box, and sending raw key events |
| * to the application. |
| * |
| * <p>Starting from API Level {@link android.os.Build.VERSION_CODES#N}, |
| * the system can deal with the situation where the application directly |
| * implements this class but one or more of the following methods are |
| * not implemented.</p> |
| * <ul> |
| * <li>{@link #getSelectedText(int)}, which was introduced in |
| * {@link android.os.Build.VERSION_CODES#GINGERBREAD}.</li> |
| * <li>{@link #setComposingRegion(int, int)}, which was introduced |
| * in {@link android.os.Build.VERSION_CODES#GINGERBREAD}.</li> |
| * <li>{@link #commitCorrection(CorrectionInfo)}, which was introduced |
| * in {@link android.os.Build.VERSION_CODES#HONEYCOMB}.</li> |
| * <li>{@link #requestCursorUpdates(int)}, which was introduced in |
| * {@link android.os.Build.VERSION_CODES#LOLLIPOP}.</li> |
| * <li>{@link #deleteSurroundingTextInCodePoints(int, int)}}, which |
| * was introduced in {@link android.os.Build.VERSION_CODES#N}.</li> |
| * <li>{@link #getHandler()}}, which was introduced in |
| * {@link android.os.Build.VERSION_CODES#N}.</li> |
| * <li>{@link #closeConnection()}}, which was introduced in |
| * {@link android.os.Build.VERSION_CODES#N}.</li> |
| * </ul> |
| * |
| * <h3>Implementing an IME or an editor</h3> |
| * <p>Text input is the result of the synergy of two essential components: |
| * an Input Method Engine (IME) and an editor. The IME can be a |
| * software keyboard, a handwriting interface, an emoji palette, a |
| * speech-to-text engine, and so on. There are typically several IMEs |
| * installed on any given Android device. In Android, IMEs extend |
| * {@link android.inputmethodservice.InputMethodService}. |
| * For more information about how to create an IME, see the |
| * <a href="{@docRoot}guide/topics/text/creating-input-method.html"> |
| * Creating an input method</a> guide. |
| * |
| * The editor is the component that receives text and displays it. |
| * Typically, this is an {@link android.widget.EditText} instance, but |
| * some applications may choose to implement their own editor for |
| * various reasons. This is a large and complicated task, and an |
| * application that does this needs to make sure the behavior is |
| * consistent with standard EditText behavior in Android. An editor |
| * needs to interact with the IME, receiving commands through |
| * this InputConnection interface, and sending commands through |
| * {@link android.view.inputmethod.InputMethodManager}. An editor |
| * should start by implementing |
| * {@link android.view.View#onCreateInputConnection(EditorInfo)} |
| * to return its own input connection.</p> |
| * |
| * <p>If you are implementing your own IME, you will need to call the |
| * methods in this interface to interact with the application. Be sure |
| * to test your IME with a wide range of applications, including |
| * browsers and rich text editors, as some may have peculiarities you |
| * need to deal with. Remember your IME may not be the only source of |
| * changes on the text, and try to be as conservative as possible in |
| * the data you send and as liberal as possible in the data you |
| * receive.</p> |
| * |
| * <p>If you are implementing your own editor, you will probably need |
| * to provide your own subclass of {@link BaseInputConnection} to |
| * answer to the commands from IMEs. Please be sure to test your |
| * editor with as many IMEs as you can as their behavior can vary a |
| * lot. Also be sure to test with various languages, including CJK |
| * languages and right-to-left languages like Arabic, as these may |
| * have different input requirements. When in doubt about the |
| * behavior you should adopt for a particular call, please mimic the |
| * default TextView implementation in the latest Android version, and |
| * if you decide to drift from it, please consider carefully that |
| * inconsistencies in text editor behavior is almost universally felt |
| * as a bad thing by users.</p> |
| * |
| * <h3>Cursors, selections and compositions</h3> |
| * <p>In Android, the cursor and the selection are one and the same |
| * thing. A "cursor" is just the special case of a zero-sized |
| * selection. As such, this documentation uses them |
| * interchangeably. Any method acting "before the cursor" would act |
| * before the start of the selection if there is one, and any method |
| * acting "after the cursor" would act after the end of the |
| * selection.</p> |
| * |
| * <p>An editor needs to be able to keep track of a currently |
| * "composing" region, like the standard edition widgets do. The |
| * composition is marked in a specific style: see |
| * {@link android.text.Spanned#SPAN_COMPOSING}. IMEs use this to help |
| * the user keep track of what part of the text they are currently |
| * focusing on, and interact with the editor using |
| * {@link InputConnection#setComposingText(CharSequence, int)}, |
| * {@link InputConnection#setComposingRegion(int, int)} and |
| * {@link InputConnection#finishComposingText()}. |
| * The composing region and the selection are completely independent |
| * of each other, and the IME may use them however they see fit.</p> |
| */ |
| public interface InputConnection { |
| /** |
| * Flag for use with {@link #getTextAfterCursor} and |
| * {@link #getTextBeforeCursor} to have style information returned |
| * along with the text. If not set, {@link #getTextAfterCursor} |
| * sends only the raw text, without style or other spans. If set, |
| * it may return a complex CharSequence of both text and style |
| * spans. <strong>Editor authors</strong>: you should strive to |
| * send text with styles if possible, but it is not required. |
| */ |
| static final int GET_TEXT_WITH_STYLES = 0x0001; |
| |
| /** |
| * Flag for use with {@link #getExtractedText} to indicate you |
| * would like to receive updates when the extracted text changes. |
| */ |
| public static final int GET_EXTRACTED_TEXT_MONITOR = 0x0001; |
| |
| /** |
| * Get <var>n</var> characters of text before the current cursor |
| * position. |
| * |
| * <p>This method may fail either if the input connection has |
| * become invalid (such as its process crashing) or the editor is |
| * taking too long to respond with the text (it is given a couple |
| * seconds to return). In either case, null is returned. This |
| * method does not affect the text in the editor in any way, nor |
| * does it affect the selection or composing spans.</p> |
| * |
| * <p>If {@link #GET_TEXT_WITH_STYLES} is supplied as flags, the |
| * editor should return a {@link android.text.SpannableString} |
| * with all the spans set on the text.</p> |
| * |
| * <p><strong>IME authors:</strong> please consider this will |
| * trigger an IPC round-trip that will take some time. Assume this |
| * method consumes a lot of time. Also, please keep in mind the |
| * Editor may choose to return less characters than requested even |
| * if they are available for performance reasons.</p> |
| * |
| * <p><strong>Editor authors:</strong> please be careful of race |
| * conditions in implementing this call. An IME can make a change |
| * to the text and use this method right away; you need to make |
| * sure the returned value is consistent with the result of the |
| * latest edits. Also, you may return less than n characters if performance |
| * dictates so, but keep in mind IMEs are relying on this for many |
| * functions: you should not, for example, limit the returned value to |
| * the current line, and specifically do not return 0 characters unless |
| * the cursor is really at the start of the text.</p> |
| * |
| * @param n The expected length of the text. |
| * @param flags Supplies additional options controlling how the text is |
| * returned. May be either 0 or {@link #GET_TEXT_WITH_STYLES}. |
| * @return the text before the cursor position; the length of the |
| * returned text might be less than <var>n</var>. |
| */ |
| public CharSequence getTextBeforeCursor(int n, int flags); |
| |
| /** |
| * Get <var>n</var> characters of text after the current cursor |
| * position. |
| * |
| * <p>This method may fail either if the input connection has |
| * become invalid (such as its process crashing) or the client is |
| * taking too long to respond with the text (it is given a couple |
| * seconds to return). In either case, null is returned. |
| * |
| * <p>This method does not affect the text in the editor in any |
| * way, nor does it affect the selection or composing spans.</p> |
| * |
| * <p>If {@link #GET_TEXT_WITH_STYLES} is supplied as flags, the |
| * editor should return a {@link android.text.SpannableString} |
| * with all the spans set on the text.</p> |
| * |
| * <p><strong>IME authors:</strong> please consider this will |
| * trigger an IPC round-trip that will take some time. Assume this |
| * method consumes a lot of time.</p> |
| * |
| * <p><strong>Editor authors:</strong> please be careful of race |
| * conditions in implementing this call. An IME can make a change |
| * to the text and use this method right away; you need to make |
| * sure the returned value is consistent with the result of the |
| * latest edits. Also, you may return less than n characters if performance |
| * dictates so, but keep in mind IMEs are relying on this for many |
| * functions: you should not, for example, limit the returned value to |
| * the current line, and specifically do not return 0 characters unless |
| * the cursor is really at the end of the text.</p> |
| * |
| * @param n The expected length of the text. |
| * @param flags Supplies additional options controlling how the text is |
| * returned. May be either 0 or {@link #GET_TEXT_WITH_STYLES}. |
| * |
| * @return the text after the cursor position; the length of the |
| * returned text might be less than <var>n</var>. |
| */ |
| public CharSequence getTextAfterCursor(int n, int flags); |
| |
| /** |
| * Gets the selected text, if any. |
| * |
| * <p>This method may fail if either the input connection has |
| * become invalid (such as its process crashing) or the client is |
| * taking too long to respond with the text (it is given a couple |
| * of seconds to return). In either case, null is returned.</p> |
| * |
| * <p>This method must not cause any changes in the editor's |
| * state.</p> |
| * |
| * <p>If {@link #GET_TEXT_WITH_STYLES} is supplied as flags, the |
| * editor should return a {@link android.text.SpannableString} |
| * with all the spans set on the text.</p> |
| * |
| * <p><strong>IME authors:</strong> please consider this will |
| * trigger an IPC round-trip that will take some time. Assume this |
| * method consumes a lot of time.</p> |
| * |
| * <p><strong>Editor authors:</strong> please be careful of race |
| * conditions in implementing this call. An IME can make a change |
| * to the text or change the selection position and use this |
| * method right away; you need to make sure the returned value is |
| * consistent with the results of the latest edits.</p> |
| * |
| * @param flags Supplies additional options controlling how the text is |
| * returned. May be either 0 or {@link #GET_TEXT_WITH_STYLES}. |
| * @return the text that is currently selected, if any, or null if |
| * no text is selected. In {@link android.os.Build.VERSION_CODES#N} and |
| * later, returns false when the target application does not implement |
| * this method. |
| */ |
| public CharSequence getSelectedText(int flags); |
| |
| /** |
| * Retrieve the current capitalization mode in effect at the |
| * current cursor position in the text. See |
| * {@link android.text.TextUtils#getCapsMode TextUtils.getCapsMode} |
| * for more information. |
| * |
| * <p>This method may fail either if the input connection has |
| * become invalid (such as its process crashing) or the client is |
| * taking too long to respond with the text (it is given a couple |
| * seconds to return). In either case, 0 is returned.</p> |
| * |
| * <p>This method does not affect the text in the editor in any |
| * way, nor does it affect the selection or composing spans.</p> |
| * |
| * <p><strong>Editor authors:</strong> please be careful of race |
| * conditions in implementing this call. An IME can change the |
| * cursor position and use this method right away; you need to make |
| * sure the returned value is consistent with the results of the |
| * latest edits and changes to the cursor position.</p> |
| * |
| * @param reqModes The desired modes to retrieve, as defined by |
| * {@link android.text.TextUtils#getCapsMode TextUtils.getCapsMode}. These |
| * constants are defined so that you can simply pass the current |
| * {@link EditorInfo#inputType TextBoxAttribute.contentType} value |
| * directly in to here. |
| * @return the caps mode flags that are in effect at the current |
| * cursor position. See TYPE_TEXT_FLAG_CAPS_* in {@link android.text.InputType}. |
| */ |
| public int getCursorCapsMode(int reqModes); |
| |
| /** |
| * Retrieve the current text in the input connection's editor, and |
| * monitor for any changes to it. This function returns with the |
| * current text, and optionally the input connection can send |
| * updates to the input method when its text changes. |
| * |
| * <p>This method may fail either if the input connection has |
| * become invalid (such as its process crashing) or the client is |
| * taking too long to respond with the text (it is given a couple |
| * seconds to return). In either case, null is returned.</p> |
| * |
| * <p>Editor authors: as a general rule, try to comply with the |
| * fields in <code>request</code> for how many chars to return, |
| * but if performance or convenience dictates otherwise, please |
| * feel free to do what is most appropriate for your case. Also, |
| * if the |
| * {@link #GET_EXTRACTED_TEXT_MONITOR} flag is set, you should be |
| * calling |
| * {@link InputMethodManager#updateExtractedText(View, int, ExtractedText)} |
| * whenever you call |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)}.</p> |
| * |
| * @param request Description of how the text should be returned. |
| * {@link android.view.inputmethod.ExtractedTextRequest} |
| * @param flags Additional options to control the client, either 0 or |
| * {@link #GET_EXTRACTED_TEXT_MONITOR}. |
| |
| * @return an {@link android.view.inputmethod.ExtractedText} |
| * object describing the state of the text view and containing the |
| * extracted text itself, or null if the input connection is no |
| * longer valid of the editor can't comply with the request for |
| * some reason. |
| */ |
| public ExtractedText getExtractedText(ExtractedTextRequest request, |
| int flags); |
| |
| /** |
| * Delete <var>beforeLength</var> characters of text before the |
| * current cursor position, and delete <var>afterLength</var> |
| * characters of text after the current cursor position, excluding |
| * the selection. Before and after refer to the order of the |
| * characters in the string, not to their visual representation: |
| * this means you don't have to figure out the direction of the |
| * text and can just use the indices as-is. |
| * |
| * <p>The lengths are supplied in Java chars, not in code points |
| * or in glyphs.</p> |
| * |
| * <p>Since this method only operates on text before and after the |
| * selection, it can't affect the contents of the selection. This |
| * may affect the composing span if the span includes characters |
| * that are to be deleted, but otherwise will not change it. If |
| * some characters in the composing span are deleted, the |
| * composing span will persist but get shortened by however many |
| * chars inside it have been removed.</p> |
| * |
| * <p><strong>IME authors:</strong> please be careful not to |
| * delete only half of a surrogate pair. Also take care not to |
| * delete more characters than are in the editor, as that may have |
| * ill effects on the application. Calling this method will cause |
| * the editor to call |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)} |
| * on your service after the batch input is over.</p> |
| * |
| * <p><strong>Editor authors:</strong> please be careful of race |
| * conditions in implementing this call. An IME can make a change |
| * to the text or change the selection position and use this |
| * method right away; you need to make sure the effects are |
| * consistent with the results of the latest edits. Also, although |
| * the IME should not send lengths bigger than the contents of the |
| * string, you should check the values for overflows and trim the |
| * indices to the size of the contents to avoid crashes. Since |
| * this changes the contents of the editor, you need to make the |
| * changes known to the input method by calling |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)}, |
| * but be careful to wait until the batch edit is over if one is |
| * in progress.</p> |
| * |
| * @param beforeLength The number of characters before the cursor to be deleted, in code unit. |
| * If this is greater than the number of existing characters between the beginning of the |
| * text and the cursor, then this method does not fail but deletes all the characters in |
| * that range. |
| * @param afterLength The number of characters after the cursor to be deleted, in code unit. |
| * If this is greater than the number of existing characters between the cursor and |
| * the end of the text, then this method does not fail but deletes all the characters in |
| * that range. |
| * @return true on success, false if the input connection is no longer valid. |
| */ |
| public boolean deleteSurroundingText(int beforeLength, int afterLength); |
| |
| /** |
| * A variant of {@link #deleteSurroundingText(int, int)}. Major differences are: |
| * |
| * <ul> |
| * <li>The lengths are supplied in code points, not in Java chars or in glyphs.</> |
| * <li>This method does nothing if there are one or more invalid surrogate pairs in the |
| * requested range.</li> |
| * </ul> |
| * |
| * <p><strong>Editor authors:</strong> In addition to the requirement in |
| * {@link #deleteSurroundingText(int, int)}, make sure to do nothing when one ore more invalid |
| * surrogate pairs are found in the requested range.</p> |
| * |
| * @see #deleteSurroundingText(int, int) |
| * |
| * @param beforeLength The number of characters before the cursor to be deleted, in code points. |
| * If this is greater than the number of existing characters between the beginning of the |
| * text and the cursor, then this method does not fail but deletes all the characters in |
| * that range. |
| * @param afterLength The number of characters after the cursor to be deleted, in code points. |
| * If this is greater than the number of existing characters between the cursor and |
| * the end of the text, then this method does not fail but deletes all the characters in |
| * that range. |
| * @return true on success, false if the input connection is no longer valid. Returns |
| * {@code false} when the target application does not implement this method. |
| */ |
| public boolean deleteSurroundingTextInCodePoints(int beforeLength, int afterLength); |
| |
| /** |
| * Replace the currently composing text with the given text, and |
| * set the new cursor position. Any composing text set previously |
| * will be removed automatically. |
| * |
| * <p>If there is any composing span currently active, all |
| * characters that it comprises are removed. The passed text is |
| * added in its place, and a composing span is added to this |
| * text. If there is no composing span active, the passed text is |
| * added at the cursor position (removing selected characters |
| * first if any), and a composing span is added on the new text. |
| * Finally, the cursor is moved to the location specified by |
| * <code>newCursorPosition</code>.</p> |
| * |
| * <p>This is usually called by IMEs to add or remove or change |
| * characters in the composing span. Calling this method will |
| * cause the editor to call |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)} |
| * on the current IME after the batch input is over.</p> |
| * |
| * <p><strong>Editor authors:</strong> please keep in mind the |
| * text may be very similar or completely different than what was |
| * in the composing span at call time, or there may not be a |
| * composing span at all. Please note that although it's not |
| * typical use, the string may be empty. Treat this normally, |
| * replacing the currently composing text with an empty string. |
| * Also, be careful with the cursor position. IMEs rely on this |
| * working exactly as described above. Since this changes the |
| * contents of the editor, you need to make the changes known to |
| * the input method by calling |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)}, |
| * but be careful to wait until the batch edit is over if one is |
| * in progress. Note that this method can set the cursor position |
| * on either edge of the composing text or entirely outside it, |
| * but the IME may also go on to move the cursor position to |
| * within the composing text in a subsequent call so you should |
| * make no assumption at all: the composing text and the selection |
| * are entirely independent.</p> |
| * |
| * @param text The composing text with styles if necessary. If no style |
| * object attached to the text, the default style for composing text |
| * is used. See {@link android.text.Spanned} for how to attach style |
| * object to the text. {@link android.text.SpannableString} and |
| * {@link android.text.SpannableStringBuilder} are two |
| * implementations of the interface {@link android.text.Spanned}. |
| * @param newCursorPosition The new cursor position around the text. If |
| * > 0, this is relative to the end of the text - 1; if <= 0, this |
| * is relative to the start of the text. So a value of 1 will |
| * always advance you to the position after the full text being |
| * inserted. Note that this means you can't position the cursor |
| * within the text, because the editor can make modifications to |
| * the text you are providing so it is not possible to correctly |
| * specify locations there. |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| */ |
| public boolean setComposingText(CharSequence text, int newCursorPosition); |
| |
| /** |
| * Mark a certain region of text as composing text. If there was a |
| * composing region, the characters are left as they were and the |
| * composing span removed, as if {@link #finishComposingText()} |
| * has been called. The default style for composing text is used. |
| * |
| * <p>The passed indices are clipped to the contents bounds. If |
| * the resulting region is zero-sized, no region is marked and the |
| * effect is the same as that of calling {@link #finishComposingText()}. |
| * The order of start and end is not important. In effect, the |
| * region from start to end and the region from end to start is |
| * the same. Editor authors, be ready to accept a start that is |
| * greater than end.</p> |
| * |
| * <p>Since this does not change the contents of the text, editors should not call |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)} and |
| * IMEs should not receive |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)}. |
| * </p> |
| * |
| * <p>This has no impact on the cursor/selection position. It may |
| * result in the cursor being anywhere inside or outside the |
| * composing region, including cases where the selection and the |
| * composing region overlap partially or entirely.</p> |
| * |
| * @param start the position in the text at which the composing region begins |
| * @param end the position in the text at which the composing region ends |
| * @return true on success, false if the input connection is no longer |
| * valid. In {@link android.os.Build.VERSION_CODES#N} and later, false is returned when the |
| * target application does not implement this method. |
| */ |
| public boolean setComposingRegion(int start, int end); |
| |
| /** |
| * Have the text editor finish whatever composing text is |
| * currently active. This simply leaves the text as-is, removing |
| * any special composing styling or other state that was around |
| * it. The cursor position remains unchanged. |
| * |
| * <p><strong>IME authors:</strong> be aware that this call may be |
| * expensive with some editors.</p> |
| * |
| * <p><strong>Editor authors:</strong> please note that the cursor |
| * may be anywhere in the contents when this is called, including |
| * in the middle of the composing span or in a completely |
| * unrelated place. It must not move.</p> |
| * |
| * @return true on success, false if the input connection |
| * is no longer valid. |
| */ |
| public boolean finishComposingText(); |
| |
| /** |
| * Commit text to the text box and set the new cursor position. |
| * |
| * <p>This method removes the contents of the currently composing |
| * text and replaces it with the passed CharSequence, and then |
| * moves the cursor according to {@code newCursorPosition}. If there |
| * is no composing text when this method is called, the new text is |
| * inserted at the cursor position, removing text inside the selection |
| * if any. This behaves like calling |
| * {@link #setComposingText(CharSequence, int) setComposingText(text, newCursorPosition)} |
| * then {@link #finishComposingText()}.</p> |
| * |
| * <p>Calling this method will cause the editor to call |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)} |
| * on the current IME after the batch input is over. |
| * <strong>Editor authors</strong>, for this to happen you need to |
| * make the changes known to the input method by calling |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)}, |
| * but be careful to wait until the batch edit is over if one is |
| * in progress.</p> |
| * |
| * @param text The text to commit. This may include styles. |
| * @param newCursorPosition The new cursor position around the text, |
| * in Java characters. If > 0, this is relative to the end |
| * of the text - 1; if <= 0, this is relative to the start |
| * of the text. So a value of 1 will always advance the cursor |
| * to the position after the full text being inserted. Note that |
| * this means you can't position the cursor within the text, |
| * because the editor can make modifications to the text |
| * you are providing so it is not possible to correctly specify |
| * locations there. |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| */ |
| public boolean commitText(CharSequence text, int newCursorPosition); |
| |
| /** |
| * Commit a completion the user has selected from the possible ones |
| * previously reported to {@link InputMethodSession#displayCompletions |
| * InputMethodSession#displayCompletions(CompletionInfo[])} or |
| * {@link InputMethodManager#displayCompletions |
| * InputMethodManager#displayCompletions(View, CompletionInfo[])}. |
| * This will result in the same behavior as if the user had |
| * selected the completion from the actual UI. In all other |
| * respects, this behaves like {@link #commitText(CharSequence, int)}. |
| * |
| * <p><strong>IME authors:</strong> please take care to send the |
| * same object that you received through |
| * {@link android.inputmethodservice.InputMethodService#onDisplayCompletions(CompletionInfo[])}. |
| * </p> |
| * |
| * <p><strong>Editor authors:</strong> if you never call |
| * {@link InputMethodSession#displayCompletions(CompletionInfo[])} or |
| * {@link InputMethodManager#displayCompletions(View, CompletionInfo[])} then |
| * a well-behaved IME should never call this on your input |
| * connection, but be ready to deal with misbehaving IMEs without |
| * crashing.</p> |
| * |
| * <p>Calling this method (with a valid {@link CompletionInfo} object) |
| * will cause the editor to call |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)} |
| * on the current IME after the batch input is over. |
| * <strong>Editor authors</strong>, for this to happen you need to |
| * make the changes known to the input method by calling |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)}, |
| * but be careful to wait until the batch edit is over if one is |
| * in progress.</p> |
| * |
| * @param text The committed completion. |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| */ |
| public boolean commitCompletion(CompletionInfo text); |
| |
| /** |
| * Commit a correction automatically performed on the raw user's input. A |
| * typical example would be to correct typos using a dictionary. |
| * |
| * <p>Calling this method will cause the editor to call |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)} |
| * on the current IME after the batch input is over. |
| * <strong>Editor authors</strong>, for this to happen you need to |
| * make the changes known to the input method by calling |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)}, |
| * but be careful to wait until the batch edit is over if one is |
| * in progress.</p> |
| * |
| * @param correctionInfo Detailed information about the correction. |
| * @return true on success, false if the input connection is no longer valid. |
| * In {@link android.os.Build.VERSION_CODES#N} and later, returns false |
| * when the target application does not implement this method. |
| */ |
| public boolean commitCorrection(CorrectionInfo correctionInfo); |
| |
| /** |
| * Set the selection of the text editor. To set the cursor |
| * position, start and end should have the same value. |
| * |
| * <p>Since this moves the cursor, calling this method will cause |
| * the editor to call |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)} |
| * on the current IME after the batch input is over. |
| * <strong>Editor authors</strong>, for this to happen you need to |
| * make the changes known to the input method by calling |
| * {@link InputMethodManager#updateSelection(View, int, int, int, int)}, |
| * but be careful to wait until the batch edit is over if one is |
| * in progress.</p> |
| * |
| * <p>This has no effect on the composing region which must stay |
| * unchanged. The order of start and end is not important. In |
| * effect, the region from start to end and the region from end to |
| * start is the same. Editor authors, be ready to accept a start |
| * that is greater than end.</p> |
| * |
| * @param start the character index where the selection should start. |
| * @param end the character index where the selection should end. |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| */ |
| public boolean setSelection(int start, int end); |
| |
| /** |
| * Have the editor perform an action it has said it can do. |
| * |
| * <p>This is typically used by IMEs when the user presses the key |
| * associated with the action.</p> |
| * |
| * @param editorAction This must be one of the action constants for |
| * {@link EditorInfo#imeOptions EditorInfo.editorType}, such as |
| * {@link EditorInfo#IME_ACTION_GO EditorInfo.EDITOR_ACTION_GO}. |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| */ |
| public boolean performEditorAction(int editorAction); |
| |
| /** |
| * Perform a context menu action on the field. The given id may be one of: |
| * {@link android.R.id#selectAll}, |
| * {@link android.R.id#startSelectingText}, {@link android.R.id#stopSelectingText}, |
| * {@link android.R.id#cut}, {@link android.R.id#copy}, |
| * {@link android.R.id#paste}, {@link android.R.id#copyUrl}, |
| * or {@link android.R.id#switchInputMethod} |
| */ |
| public boolean performContextMenuAction(int id); |
| |
| /** |
| * Tell the editor that you are starting a batch of editor |
| * operations. The editor will try to avoid sending you updates |
| * about its state until {@link #endBatchEdit} is called. Batch |
| * edits nest. |
| * |
| * <p><strong>IME authors:</strong> use this to avoid getting |
| * calls to |
| * {@link android.inputmethodservice.InputMethodService#onUpdateSelection(int, int, int, int, int, int)} |
| * corresponding to intermediate state. Also, use this to avoid |
| * flickers that may arise from displaying intermediate state. Be |
| * sure to call {@link #endBatchEdit} for each call to this, or |
| * you may block updates in the editor.</p> |
| * |
| * <p><strong>Editor authors:</strong> while a batch edit is in |
| * progress, take care not to send updates to the input method and |
| * not to update the display. IMEs use this intensively to this |
| * effect. Also please note that batch edits need to nest |
| * correctly.</p> |
| * |
| * @return true if a batch edit is now in progress, false otherwise. Since |
| * this method starts a batch edit, that means it will always return true |
| * unless the input connection is no longer valid. |
| */ |
| public boolean beginBatchEdit(); |
| |
| /** |
| * Tell the editor that you are done with a batch edit previously |
| * initiated with {@link #beginBatchEdit}. This ends the latest |
| * batch only. |
| * |
| * <p><strong>IME authors:</strong> make sure you call this |
| * exactly once for each call to {@link #beginBatchEdit}.</p> |
| * |
| * <p><strong>Editor authors:</strong> please be careful about |
| * batch edit nesting. Updates still to be held back until the end |
| * of the last batch edit.</p> |
| * |
| * @return true if there is still a batch edit in progress after closing |
| * the latest one (in other words, if the nesting count is > 0), false |
| * otherwise or if the input connection is no longer valid. |
| */ |
| public boolean endBatchEdit(); |
| |
| /** |
| * Send a key event to the process that is currently attached |
| * through this input connection. The event will be dispatched |
| * like a normal key event, to the currently focused view; this |
| * generally is the view that is providing this InputConnection, |
| * but due to the asynchronous nature of this protocol that can |
| * not be guaranteed and the focus may have changed by the time |
| * the event is received. |
| * |
| * <p>This method can be used to send key events to the |
| * application. For example, an on-screen keyboard may use this |
| * method to simulate a hardware keyboard. There are three types |
| * of standard keyboards, numeric (12-key), predictive (20-key) |
| * and ALPHA (QWERTY). You can specify the keyboard type by |
| * specify the device id of the key event.</p> |
| * |
| * <p>You will usually want to set the flag |
| * {@link KeyEvent#FLAG_SOFT_KEYBOARD KeyEvent.FLAG_SOFT_KEYBOARD} |
| * on all key event objects you give to this API; the flag will |
| * not be set for you.</p> |
| * |
| * <p>Note that it's discouraged to send such key events in normal |
| * operation; this is mainly for use with |
| * {@link android.text.InputType#TYPE_NULL} type text fields. Use |
| * the {@link #commitText} family of methods to send text to the |
| * application instead.</p> |
| * |
| * @param event The key event. |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| * |
| * @see KeyEvent |
| * @see KeyCharacterMap#NUMERIC |
| * @see KeyCharacterMap#PREDICTIVE |
| * @see KeyCharacterMap#ALPHA |
| */ |
| public boolean sendKeyEvent(KeyEvent event); |
| |
| /** |
| * Clear the given meta key pressed states in the given input |
| * connection. |
| * |
| * <p>This can be used by the IME to clear the meta key states set |
| * by a hardware keyboard with latched meta keys, if the editor |
| * keeps track of these.</p> |
| * |
| * @param states The states to be cleared, may be one or more bits as |
| * per {@link KeyEvent#getMetaState() KeyEvent.getMetaState()}. |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| */ |
| public boolean clearMetaKeyStates(int states); |
| |
| /** |
| * Called by the IME to tell the client when it switches between |
| * fullscreen and normal modes. This will normally be called for |
| * you by the standard implementation of |
| * {@link android.inputmethodservice.InputMethodService}. |
| * |
| * @return true on success, false if the input connection is no longer |
| * valid. |
| */ |
| public boolean reportFullscreenMode(boolean enabled); |
| |
| /** |
| * API to send private commands from an input method to its |
| * connected editor. This can be used to provide domain-specific |
| * features that are only known between certain input methods and |
| * their clients. Note that because the InputConnection protocol |
| * is asynchronous, you have no way to get a result back or know |
| * if the client understood the command; you can use the |
| * information in {@link EditorInfo} to determine if a client |
| * supports a particular command. |
| * |
| * @param action Name of the command to be performed. This <em>must</em> |
| * be a scoped name, i.e. prefixed with a package name you own, so that |
| * different developers will not create conflicting commands. |
| * @param data Any data to include with the command. |
| * @return true if the command was sent (whether or not the |
| * associated editor understood it), false if the input connection is no longer |
| * valid. |
| */ |
| public boolean performPrivateCommand(String action, Bundle data); |
| |
| /** |
| * The editor is requested to call |
| * {@link InputMethodManager#updateCursorAnchorInfo(android.view.View, CursorAnchorInfo)} at |
| * once, as soon as possible, regardless of cursor/anchor position changes. This flag can be |
| * used together with {@link #CURSOR_UPDATE_MONITOR}. |
| */ |
| public static final int CURSOR_UPDATE_IMMEDIATE = 1 << 0; |
| |
| /** |
| * The editor is requested to call |
| * {@link InputMethodManager#updateCursorAnchorInfo(android.view.View, CursorAnchorInfo)} |
| * whenever cursor/anchor position is changed. To disable monitoring, call |
| * {@link InputConnection#requestCursorUpdates(int)} again with this flag off. |
| * <p> |
| * This flag can be used together with {@link #CURSOR_UPDATE_IMMEDIATE}. |
| * </p> |
| */ |
| public static final int CURSOR_UPDATE_MONITOR = 1 << 1; |
| |
| /** |
| * Called by the input method to ask the editor for calling back |
| * {@link InputMethodManager#updateCursorAnchorInfo(android.view.View, CursorAnchorInfo)} to |
| * notify cursor/anchor locations. |
| * |
| * @param cursorUpdateMode {@link #CURSOR_UPDATE_IMMEDIATE} and/or |
| * {@link #CURSOR_UPDATE_MONITOR}. Pass {@code 0} to disable the effect of |
| * {@link #CURSOR_UPDATE_MONITOR}. |
| * @return {@code true} if the request is scheduled. {@code false} to indicate that when the |
| * application will not call |
| * {@link InputMethodManager#updateCursorAnchorInfo(android.view.View, CursorAnchorInfo)}. |
| * In {@link android.os.Build.VERSION_CODES#N} and later, returns {@code false} also when the |
| * target application does not implement this method. |
| */ |
| public boolean requestCursorUpdates(int cursorUpdateMode); |
| |
| /** |
| * Called by the {@link InputMethodManager} to enable application developers to specify a |
| * dedicated {@link Handler} on which incoming IPC method calls from input methods will be |
| * dispatched. |
| * |
| * <p>Note: This does nothing when called from input methods.</p> |
| * |
| * @return {@code null} to use the default {@link Handler}. |
| */ |
| public Handler getHandler(); |
| |
| /** |
| * Called by the system up to only once to notify that the system is about to invalidate |
| * connection between the input method and the application. |
| * |
| * <p><strong>Editor authors</strong>: You can clear all the nested batch edit right now and |
| * you no longer need to handle subsequent callbacks on this connection, including |
| * {@link #beginBatchEdit()}}. Note that although the system tries to call this method whenever |
| * possible, there may be a chance that this method is not called in some exceptional |
| * situations.</p> |
| * |
| * <p>Note: This does nothing when called from input methods.</p> |
| */ |
| public void closeConnection(); |
| |
| /** |
| * When this flag is used, the editor will be able to request read access to the content URI |
| * contained in the {@link InputContentInfo} object. |
| * |
| * <p>Make sure that the content provider owning the Uri sets the |
| * {@link android.R.styleable#AndroidManifestProvider_grantUriPermissions |
| * grantUriPermissions} attribute in its manifest or included the |
| * {@link android.R.styleable#AndroidManifestGrantUriPermission |
| * <grant-uri-permissions>} tag. Otherwise {@link InputContentInfo#requestPermission()} |
| * can fail.</p> |
| * |
| * <p>Although calling this API is allowed only for the IME that is currently selected, the |
| * client is able to request a temporary read-only access even after the current IME is switched |
| * to any other IME as long as the client keeps {@link InputContentInfo} object.</p> |
| **/ |
| public static int INPUT_CONTENT_GRANT_READ_URI_PERMISSION = |
| android.content.Intent.FLAG_GRANT_READ_URI_PERMISSION; // 0x00000001 |
| |
| /** |
| * Called by the input method to commit a content such as PNG image to the editor. |
| * |
| * <p>In order to avoid variety of compatibility issues, this focuses on a simple use case, |
| * where we expect editors and IMEs work cooperatively as follows:</p> |
| * <ul> |
| * <li>Editor must keep {@link EditorInfo#contentMimeTypes} to be {@code null} if it does |
| * not support this method at all.</li> |
| * <li>Editor can ignore this request when the MIME type specified in |
| * {@code inputContentInfo} does not match to any of {@link EditorInfo#contentMimeTypes}. |
| * </li> |
| * <li>Editor can ignore the cursor position when inserting the provided context.</li> |
| * <li>Editor can return {@code true} asynchronously, even before it starts loading the |
| * content.</li> |
| * <li>Editor should provide a way to delete the content inserted by this method, or revert |
| * the effect caused by this method.</li> |
| * <li>IME should not call this method when there is any composing text, in case calling |
| * this method causes focus change.</li> |
| * <li>IME should grant a permission for the editor to read the content. See |
| * {@link EditorInfo#packageName} about how to obtain the package name of the editor.</li> |
| * </ul> |
| * |
| * @param inputContentInfo Content to be inserted. |
| * @param flags {@code 0} or {@link #INPUT_CONTENT_GRANT_READ_URI_PERMISSION}. |
| * @param opts optional bundle data. This can be {@code null}. |
| * @return {@code true} if this request is accepted by the application, no matter if the request |
| * is already handled or still being handled in background. |
| */ |
| public boolean commitContent(@NonNull InputContentInfo inputContentInfo, int flags, |
| @Nullable Bundle opts); |
| } |
