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/*
* Copyright (C) 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.inputmethodservice;
import android.content.Context;
import android.util.AttributeSet;
import android.view.inputmethod.ExtractedText;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
/***
* Specialization of {@link EditText} for showing and interacting with the
* extracted text in a full-screen input method.
*/
public class ExtractEditText extends EditText {
private InputMethodService mIME;
private int mSettingExtractedText;
public ExtractEditText(Context context) {
super(context, null);
}
public ExtractEditText(Context context, AttributeSet attrs) {
super(context, attrs, com.android.internal.R.attr.editTextStyle);
}
public ExtractEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
void setIME(InputMethodService ime) {
mIME = ime;
}
/**
* Start making changes that will not be reported to the client. That
* is, {@link #onSelectionChanged(int, int)} will not result in sending
* the new selection to the client
*/
public void startInternalChanges() {
mSettingExtractedText += 1;
}
/**
* Finish making changes that will not be reported to the client. That
* is, {@link #onSelectionChanged(int, int)} will not result in sending
* the new selection to the client
*/
public void finishInternalChanges() {
mSettingExtractedText -= 1;
}
/**
* Implement just to keep track of when we are setting text from the
* client (vs. seeing changes in ourself from the user).
*/
@Override public void setExtractedText(ExtractedText text) {
try {
mSettingExtractedText++;
super.setExtractedText(text);
} finally {
mSettingExtractedText--;
}
}
/**
* Report to the underlying text editor about selection changes.
*/
@Override protected void onSelectionChanged(int selStart, int selEnd) {
if (mSettingExtractedText == 0 && mIME != null && selStart >= 0 && selEnd >= 0) {
mIME.onExtractedSelectionChanged(selStart, selEnd);
}
}
/**
* Redirect clicks to the IME for handling there. First allows any
* on click handler to run, though.
*/
@Override public boolean performClick() {
if (!super.performClick() && mIME != null) {
mIME.onExtractedTextClicked();
return true;
}
return false;
}
@Override public boolean onTextContextMenuItem(int id) {
if (mIME != null && mIME.onExtractTextContextMenuItem(id)) {
return true;
}
return super.onTextContextMenuItem(id);
}
/**
* We are always considered to be an input method target.
*/
@Override
public boolean isInputMethodTarget() {
return true;
}
/**
* Return true if the edit text is currently showing a scroll bar.
*/
public boolean hasVerticalScrollBar() {
return computeVerticalScrollRange() > computeVerticalScrollExtent();
}
/**
* Pretend like the window this view is in always has focus, so its
* highlight and cursor will be displayed.
*/
@Override public boolean hasWindowFocus() {
return this.isEnabled();
}
/**
* Pretend like this view always has focus, so its
* highlight and cursor will be displayed.
*/
@Override public boolean isFocused() {
return this.isEnabled();
}
/**
* Pretend like this view always has focus, so its
* highlight and cursor will be displayed.
*/
@Override public boolean hasFocus() {
return this.isEnabled();
}
/**
* @hide
*/
@Override protected void viewClicked(InputMethodManager imm) {
// As an instance of this class is supposed to be owned by IMS,
// and it has a reference to the IMS (the current IME),
// we just need to call back its onViewClicked() here.
// It should be good to avoid unnecessary IPCs by doing this as well.
if (mIME != null) {
mIME.onViewClicked(false);
}
}
/**
* Delete the range of text, supposedly valid
* @hide
*/
@Override
protected void deleteText_internal(int start, int end) {
// Do not call the super method. This will change the source TextView instead, which
// will update the ExtractTextView.
mIME.onExtractedDeleteText(start, end);
}
/**
* Replaces the range of text [start, end[ by replacement text
* @hide
*/
@Override
protected void replaceText_internal(int start, int end, CharSequence text) {
// Do not call the super method. This will change the source TextView instead, which
// will update the ExtractTextView.
mIME.onExtractedReplaceText(start, end, text);
}
}
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