mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
554 lines
20 KiB
Java
554 lines
20 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko.toolbar;
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import org.mozilla.gecko.R;
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import org.mozilla.gecko.toolbar.BrowserToolbar.OnCommitListener;
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import org.mozilla.gecko.toolbar.BrowserToolbar.OnDismissListener;
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import org.mozilla.gecko.toolbar.BrowserToolbar.OnFilterListener;
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import org.mozilla.gecko.CustomEditText;
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import org.mozilla.gecko.CustomEditText.OnKeyPreImeListener;
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import org.mozilla.gecko.InputMethods;
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import org.mozilla.gecko.util.GamepadUtils;
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import org.mozilla.gecko.util.StringUtils;
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import android.content.Context;
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import android.graphics.Rect;
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import android.os.Build;
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import android.text.Editable;
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import android.text.NoCopySpan;
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import android.text.Selection;
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import android.text.Spanned;
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import android.text.TextUtils;
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import android.text.TextWatcher;
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import android.text.style.BackgroundColorSpan;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.view.KeyEvent;
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import android.view.View;
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import android.view.View.OnKeyListener;
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import android.view.inputmethod.BaseInputConnection;
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import android.view.inputmethod.EditorInfo;
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import android.view.inputmethod.InputConnection;
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import android.view.inputmethod.InputConnectionWrapper;
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import android.view.inputmethod.InputMethodManager;
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/**
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* {@code ToolbarEditText} is the text entry used when the toolbar
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* is in edit state. It handles all the necessary input method machinery.
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* It's meant to be owned by {@code ToolbarEditLayout}.
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*/
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public class ToolbarEditText extends CustomEditText
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implements AutocompleteHandler {
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private static final String LOGTAG = "GeckoToolbarEditText";
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private static final NoCopySpan AUTOCOMPLETE_SPAN = new NoCopySpan.Concrete();
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private final Context mContext;
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private OnCommitListener mCommitListener;
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private OnDismissListener mDismissListener;
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private OnFilterListener mFilterListener;
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// The previous autocomplete result returned to us
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private String mAutoCompleteResult = "";
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// Length of the user-typed portion of the result
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private int mAutoCompletePrefixLength;
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// If text change is due to us setting autocomplete
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private boolean mSettingAutoComplete;
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// Spans used for marking the autocomplete text
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private Object[] mAutoCompleteSpans;
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// Do not process autocomplete result
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private boolean mDiscardAutoCompleteResult;
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public ToolbarEditText(Context context, AttributeSet attrs) {
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super(context, attrs);
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mContext = context;
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}
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void setOnCommitListener(OnCommitListener listener) {
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mCommitListener = listener;
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}
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void setOnDismissListener(OnDismissListener listener) {
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mDismissListener = listener;
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}
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void setOnFilterListener(OnFilterListener listener) {
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mFilterListener = listener;
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}
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@Override
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public void onAttachedToWindow() {
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setOnKeyListener(new KeyListener());
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setOnKeyPreImeListener(new KeyPreImeListener());
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setOnSelectionChangedListener(new SelectionChangeListener());
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addTextChangedListener(new TextChangeListener());
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}
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@Override
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public void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
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super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
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if (gainFocus) {
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resetAutocompleteState();
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return;
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}
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removeAutocomplete(getText());
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final InputMethodManager imm = InputMethods.getInputMethodManager(mContext);
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try {
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imm.restartInput(this);
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imm.hideSoftInputFromWindow(getWindowToken(), 0);
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} catch (NullPointerException e) {
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Log.e(LOGTAG, "InputMethodManagerService, why are you throwing"
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+ " a NullPointerException? See bug 782096", e);
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}
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}
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/**
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* Mark the start of autocomplete changes so our text change
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* listener does not react to changes in autocomplete text
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*/
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private void beginSettingAutocomplete() {
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beginBatchEdit();
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mSettingAutoComplete = true;
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}
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/**
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* Mark the end of autocomplete changes
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*/
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private void endSettingAutocomplete() {
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mSettingAutoComplete = false;
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endBatchEdit();
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}
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/**
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* Reset autocomplete states to their initial values
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*/
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private void resetAutocompleteState() {
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mAutoCompleteSpans = new Object[] {
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// Span to mark the autocomplete text
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AUTOCOMPLETE_SPAN,
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// Span to change the autocomplete text color
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new BackgroundColorSpan(getHighlightColor())
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};
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mAutoCompleteResult = "";
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mAutoCompletePrefixLength = 0;
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}
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/**
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* Get the portion of text that is not marked as autocomplete text.
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*
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* @param text Current text content that may include autocomplete text
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*/
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private static String getNonAutocompleteText(final Editable text) {
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final int start = text.getSpanStart(AUTOCOMPLETE_SPAN);
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if (start < 0) {
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// No autocomplete text; return the whole string.
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return text.toString();
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}
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// Only return the portion that's not autocomplete text
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return TextUtils.substring(text, 0, start);
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}
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/**
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* Remove any autocomplete text
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*
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* @param text Current text content that may include autocomplete text
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*/
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private boolean removeAutocomplete(final Editable text) {
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final int start = text.getSpanStart(AUTOCOMPLETE_SPAN);
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if (start < 0) {
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// No autocomplete text
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return false;
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}
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beginSettingAutocomplete();
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// When we call delete() here, the autocomplete spans we set are removed as well.
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text.delete(start, text.length());
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// Keep mAutoCompletePrefixLength the same because the prefix has not changed.
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// Clear mAutoCompleteResult to make sure we get fresh autocomplete text next time.
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mAutoCompleteResult = "";
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// Reshow the cursor.
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setCursorVisible(true);
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endSettingAutocomplete();
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return true;
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}
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/**
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* Convert any autocomplete text to regular text
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*
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* @param text Current text content that may include autocomplete text
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*/
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private boolean commitAutocomplete(final Editable text) {
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final int start = text.getSpanStart(AUTOCOMPLETE_SPAN);
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if (start < 0) {
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// No autocomplete text
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return false;
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}
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beginSettingAutocomplete();
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// Remove all spans here to convert from autocomplete text to regular text
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for (final Object span : mAutoCompleteSpans) {
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text.removeSpan(span);
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}
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// Keep mAutoCompleteResult the same because the result has not changed.
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// Reset mAutoCompletePrefixLength because the prefix now includes the autocomplete text.
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mAutoCompletePrefixLength = text.length();
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// Reshow the cursor.
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setCursorVisible(true);
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endSettingAutocomplete();
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// Filter on the new text
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if (mFilterListener != null) {
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mFilterListener.onFilter(text.toString(), null);
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}
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return true;
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}
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/**
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* Add autocomplete text based on the result URI.
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*
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* @param result Result URI to be turned into autocomplete text
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*/
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@Override
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public final void onAutocomplete(final String result) {
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// If mDiscardAutoCompleteResult is true, we temporarily disabled
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// autocomplete (due to backspacing, etc.) and we should bail early.
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if (mDiscardAutoCompleteResult) {
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return;
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}
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if (!isEnabled() || result == null) {
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mAutoCompleteResult = "";
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return;
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}
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final Editable text = getText();
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final int textLength = text.length();
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final int resultLength = result.length();
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final int autoCompleteStart = text.getSpanStart(AUTOCOMPLETE_SPAN);
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mAutoCompleteResult = result;
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if (autoCompleteStart > -1) {
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// Autocomplete text already exists; we should replace existing autocomplete text.
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// If the result and the current text don't have the same prefixes,
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// the result is stale and we should wait for the another result to come in.
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if (!TextUtils.regionMatches(result, 0, text, 0, autoCompleteStart)) {
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return;
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}
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beginSettingAutocomplete();
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// Replace the existing autocomplete text with new one.
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// replace() preserves the autocomplete spans that we set before.
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text.replace(autoCompleteStart, textLength, result, autoCompleteStart, resultLength);
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// Reshow the cursor if there is no longer any autocomplete text.
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if (autoCompleteStart == resultLength) {
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setCursorVisible(true);
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}
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endSettingAutocomplete();
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} else {
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// No autocomplete text yet; we should add autocomplete text
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// If the result prefix doesn't match the current text,
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// the result is stale and we should wait for the another result to come in.
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if (resultLength <= textLength ||
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!TextUtils.regionMatches(result, 0, text, 0, textLength)) {
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return;
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}
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final Object[] spans = text.getSpans(textLength, textLength, Object.class);
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final int[] spanStarts = new int[spans.length];
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final int[] spanEnds = new int[spans.length];
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final int[] spanFlags = new int[spans.length];
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// Save selection/composing span bounds so we can restore them later.
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for (int i = 0; i < spans.length; i++) {
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final Object span = spans[i];
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final int spanFlag = text.getSpanFlags(span);
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// We don't care about spans that are not selection or composing spans.
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// For those spans, spanFlag[i] will be 0 and we don't restore them.
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if ((spanFlag & Spanned.SPAN_COMPOSING) == 0 &&
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(span != Selection.SELECTION_START) &&
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(span != Selection.SELECTION_END)) {
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continue;
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}
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spanStarts[i] = text.getSpanStart(span);
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spanEnds[i] = text.getSpanEnd(span);
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spanFlags[i] = spanFlag;
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}
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beginSettingAutocomplete();
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// First add trailing text.
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text.append(result, textLength, resultLength);
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// Mark added text as autocomplete text.
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for (final Object span : mAutoCompleteSpans) {
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text.setSpan(span, textLength, resultLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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// Hide the cursor.
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setCursorVisible(false);
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// Make sure the autocomplete text is visible. If the autocomplete text is too
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// long, it would appear the cursor will be scrolled out of view. However, this
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// is not the case in practice, because EditText still makes sure the cursor is
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// still in view.
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bringPointIntoView(resultLength);
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// Restore selection/composing spans.
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for (int i = 0; i < spans.length; i++) {
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final int spanFlag = spanFlags[i];
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if (spanFlag == 0) {
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// Skip if the span was ignored before.
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continue;
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}
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text.setSpan(spans[i], spanStarts[i], spanEnds[i], spanFlag);
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}
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endSettingAutocomplete();
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}
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}
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private static boolean hasCompositionString(Editable content) {
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Object[] spans = content.getSpans(0, content.length(), Object.class);
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if (spans != null) {
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for (Object span : spans) {
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if ((content.getSpanFlags(span) & Spanned.SPAN_COMPOSING) != 0) {
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// Found composition string.
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Code to handle deleting autocomplete first when backspacing.
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* If there is no autocomplete text, both removeAutocomplete() and commitAutocomplete()
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* are no-ops and return false. Therefore we can use them here without checking explicitly
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* if we have autocomplete text or not.
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*/
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@Override
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public InputConnection onCreateInputConnection(final EditorInfo outAttrs) {
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final InputConnection ic = super.onCreateInputConnection(outAttrs);
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if (ic == null) {
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return null;
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}
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return new InputConnectionWrapper(ic, false) {
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@Override
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public boolean deleteSurroundingText(final int beforeLength, final int afterLength) {
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if (removeAutocomplete(getText())) {
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// If we have autocomplete text, the cursor is at the boundary between
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// regular and autocomplete text. So regardless of which direction we
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// are deleting, we should delete the autocomplete text first.
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return false;
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}
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return super.deleteSurroundingText(beforeLength, afterLength);
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}
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private boolean removeAutocompleteOnComposing(final CharSequence text) {
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final Editable editable = getText();
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final int composingStart = BaseInputConnection.getComposingSpanStart(editable);
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final int composingEnd = BaseInputConnection.getComposingSpanEnd(editable);
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// We only delete the autocomplete text when the user is backspacing,
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// i.e. when the composing text is getting shorter.
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if (composingStart >= 0 &&
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composingEnd >= 0 &&
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(composingEnd - composingStart) > text.length() &&
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removeAutocomplete(editable)) {
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// Make the IME aware that we interrupted the setComposingText call,
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// by having finishComposingText() send change notifications to the IME.
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finishComposingText();
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return true;
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}
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return false;
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}
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@Override
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public boolean commitText(CharSequence text, int newCursorPosition) {
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if (removeAutocompleteOnComposing(text)) {
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return false;
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}
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return super.commitText(text, newCursorPosition);
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}
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@Override
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public boolean setComposingText(final CharSequence text, final int newCursorPosition) {
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if (removeAutocompleteOnComposing(text)) {
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return false;
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}
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return super.setComposingText(text, newCursorPosition);
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}
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};
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}
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private class SelectionChangeListener implements OnSelectionChangedListener {
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@Override
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public void onSelectionChanged(final int selStart, final int selEnd) {
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// The user has repositioned the cursor somewhere. We need to adjust
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// the autocomplete text depending on where the new cursor is.
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final Editable text = getText();
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final int start = text.getSpanStart(AUTOCOMPLETE_SPAN);
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if (start < 0 || (start == selStart && start == selEnd)) {
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// Do not commit autocomplete text if there is no autocomplete text
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// or if selection is still at start of autocomplete text
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return;
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}
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if (selStart <= start && selEnd <= start) {
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// The cursor is in user-typed text; remove any autocomplete text.
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removeAutocomplete(text);
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} else {
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// The cursor is in the autocomplete text; commit it so it becomes regular text.
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commitAutocomplete(text);
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}
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}
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}
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private class TextChangeListener implements TextWatcher {
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@Override
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public void afterTextChanged(final Editable editable) {
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if (!isEnabled() || mSettingAutoComplete) {
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return;
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}
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final String text = getNonAutocompleteText(editable);
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final int textLength = text.length();
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boolean doAutocomplete = true;
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if (StringUtils.isSearchQuery(text, false)) {
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doAutocomplete = false;
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} else if (mAutoCompletePrefixLength > textLength) {
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// If you're hitting backspace (the string is getting smaller), don't autocomplete
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doAutocomplete = false;
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}
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mAutoCompletePrefixLength = textLength;
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// If we are not autocompleting, we set mDiscardAutoCompleteResult to true
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// to discard any autocomplete results that are in-flight, and vice versa.
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mDiscardAutoCompleteResult = !doAutocomplete;
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if (doAutocomplete && mAutoCompleteResult.startsWith(text)) {
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// If this text already matches our autocomplete text, autocomplete likely
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// won't change. Just reuse the old autocomplete value.
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onAutocomplete(mAutoCompleteResult);
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doAutocomplete = false;
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} else {
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// Otherwise, remove the old autocomplete text
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// until any new autocomplete text gets added.
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removeAutocomplete(editable);
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}
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if (mFilterListener != null) {
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mFilterListener.onFilter(text, doAutocomplete ? ToolbarEditText.this : null);
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}
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}
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@Override
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public void beforeTextChanged(CharSequence s, int start, int count,
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int after) {
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// do nothing
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}
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@Override
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public void onTextChanged(CharSequence s, int start, int before,
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int count) {
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// do nothing
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}
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}
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private class KeyPreImeListener implements OnKeyPreImeListener {
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@Override
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public boolean onKeyPreIme(View v, int keyCode, KeyEvent event) {
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// We only want to process one event per tap
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if (event.getAction() != KeyEvent.ACTION_DOWN) {
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return false;
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}
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if (keyCode == KeyEvent.KEYCODE_ENTER) {
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// If the edit text has a composition string, don't submit the text yet.
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// ENTER is needed to commit the composition string.
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final Editable content = getText();
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if (!hasCompositionString(content)) {
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if (mCommitListener != null) {
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mCommitListener.onCommit();
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}
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return true;
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}
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}
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if (keyCode == KeyEvent.KEYCODE_BACK) {
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// Drop the virtual keyboard.
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clearFocus();
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return true;
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}
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return false;
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}
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}
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private class KeyListener implements View.OnKeyListener {
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@Override
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public boolean onKey(View v, int keyCode, KeyEvent event) {
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if (keyCode == KeyEvent.KEYCODE_ENTER || GamepadUtils.isActionKey(event)) {
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if (event.getAction() != KeyEvent.ACTION_DOWN) {
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return true;
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}
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if (mCommitListener != null) {
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mCommitListener.onCommit();
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}
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return true;
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} else if (GamepadUtils.isBackKey(event)) {
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if (mDismissListener != null) {
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mDismissListener.onDismiss();
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}
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return true;
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}
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if ((keyCode == KeyEvent.KEYCODE_DEL ||
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(Build.VERSION.SDK_INT >= 11 &&
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keyCode == KeyEvent.KEYCODE_FORWARD_DEL)) &&
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removeAutocomplete(getText())) {
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// Delete autocomplete text when backspacing or forward deleting.
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|
|
}
|