| /* |
| * Copyright (C) 2007 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.webkit; |
| |
| import android.content.Context; |
| import android.text.Editable; |
| import android.text.InputFilter; |
| import android.text.Selection; |
| import android.text.Spannable; |
| import android.text.TextUtils; |
| import android.text.method.MovementMethod; |
| import android.util.Log; |
| import android.view.KeyCharacterMap; |
| import android.view.KeyEvent; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.inputmethod.EditorInfo; |
| import android.view.inputmethod.InputMethodManager; |
| import android.view.inputmethod.InputConnection; |
| import android.widget.AbsoluteLayout.LayoutParams; |
| import android.widget.ArrayAdapter; |
| import android.widget.AutoCompleteTextView; |
| import android.widget.TextView; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * WebTextView is a specialized version of EditText used by WebView |
| * to overlay html textfields (and textareas) to use our standard |
| * text editing. |
| */ |
| /* package */ class WebTextView extends AutoCompleteTextView { |
| |
| static final String LOGTAG = "webtextview"; |
| |
| private WebView mWebView; |
| private boolean mSingle; |
| private int mWidthSpec; |
| private int mHeightSpec; |
| private int mNodePointer; |
| // FIXME: This is a hack for blocking unmatched key ups, in particular |
| // on the enter key. The method for blocking unmatched key ups prevents |
| // the shift key from working properly. |
| private boolean mGotEnterDown; |
| private int mMaxLength; |
| // Keep track of the text before the change so we know whether we actually |
| // need to send down the DOM events. |
| private String mPreChange; |
| // Array to store the final character added in onTextChanged, so that its |
| // KeyEvents may be determined. |
| private char[] mCharacter = new char[1]; |
| // This is used to reset the length filter when on a textfield |
| // with no max length. |
| // FIXME: This can be replaced with TextView.NO_FILTERS if that |
| // is made public/protected. |
| private static final InputFilter[] NO_FILTERS = new InputFilter[0]; |
| |
| /** |
| * Create a new WebTextView. |
| * @param context The Context for this WebTextView. |
| * @param webView The WebView that created this. |
| */ |
| /* package */ WebTextView(Context context, WebView webView) { |
| super(context); |
| mWebView = webView; |
| mMaxLength = -1; |
| setImeOptions(EditorInfo.IME_ACTION_NONE); |
| // Allow webkit's drawing to show through |
| setWillNotDraw(true); |
| setCursorVisible(false); |
| } |
| |
| @Override |
| public boolean dispatchKeyEvent(KeyEvent event) { |
| if (event.isSystem()) { |
| return super.dispatchKeyEvent(event); |
| } |
| // Treat ACTION_DOWN and ACTION MULTIPLE the same |
| boolean down = event.getAction() != KeyEvent.ACTION_UP; |
| int keyCode = event.getKeyCode(); |
| Spannable text = (Spannable) getText(); |
| int oldLength = text.length(); |
| // Normally the delete key's dom events are sent via onTextChanged. |
| // However, if the length is zero, the text did not change, so we |
| // go ahead and pass the key down immediately. |
| if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { |
| sendDomEvent(event); |
| return true; |
| } |
| |
| if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { |
| if (isPopupShowing()) { |
| return super.dispatchKeyEvent(event); |
| } |
| if (!down) { |
| // Hide the keyboard, since the user has just submitted this |
| // form. The submission happens thanks to the two calls |
| // to sendDomEvent. |
| InputMethodManager.getInstance(mContext) |
| .hideSoftInputFromWindow(getWindowToken(), 0); |
| sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); |
| sendDomEvent(event); |
| } |
| return super.dispatchKeyEvent(event); |
| } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { |
| // Note that this handles center key and trackball. |
| if (isPopupShowing()) { |
| return super.dispatchKeyEvent(event); |
| } |
| if (!mWebView.nativeCursorMatchesFocus()) { |
| return down ? mWebView.onKeyDown(keyCode, event) : mWebView |
| .onKeyUp(keyCode, event); |
| } |
| // Center key should be passed to a potential onClick |
| if (!down) { |
| mWebView.shortPressOnTextField(); |
| } |
| // Pass to super to handle longpress. |
| return super.dispatchKeyEvent(event); |
| } |
| boolean isArrowKey = false; |
| switch(keyCode) { |
| case KeyEvent.KEYCODE_DPAD_LEFT: |
| case KeyEvent.KEYCODE_DPAD_RIGHT: |
| case KeyEvent.KEYCODE_DPAD_UP: |
| case KeyEvent.KEYCODE_DPAD_DOWN: |
| if (!mWebView.nativeCursorMatchesFocus()) { |
| return down ? mWebView.onKeyDown(keyCode, event) : mWebView |
| .onKeyUp(keyCode, event); |
| |
| } |
| isArrowKey = true; |
| break; |
| } |
| |
| // Ensure there is a layout so arrow keys are handled properly. |
| if (getLayout() == null) { |
| measure(mWidthSpec, mHeightSpec); |
| } |
| int oldStart = Selection.getSelectionStart(text); |
| int oldEnd = Selection.getSelectionEnd(text); |
| |
| boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; |
| // If we are at max length, and there is a selection rather than a |
| // cursor, we need to store the text to compare later, since the key |
| // may have changed the string. |
| String oldText; |
| if (maxedOut && oldEnd != oldStart) { |
| oldText = text.toString(); |
| } else { |
| oldText = ""; |
| } |
| if (super.dispatchKeyEvent(event)) { |
| // If the WebTextView handled the key it was either an alphanumeric |
| // key, a delete, or a movement within the text. All of those are |
| // ok to pass to javascript. |
| |
| // UNLESS there is a max length determined by the html. In that |
| // case, if the string was already at the max length, an |
| // alphanumeric key will be erased by the LengthFilter, |
| // so do not pass down to javascript, and instead |
| // return true. If it is an arrow key or a delete key, we can go |
| // ahead and pass it down. |
| if (KeyEvent.KEYCODE_ENTER == keyCode) { |
| // For multi-line text boxes, newlines will |
| // trigger onTextChanged for key down (which will send both |
| // key up and key down) but not key up. |
| mGotEnterDown = true; |
| } |
| if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { |
| if (oldEnd == oldStart) { |
| // Return true so the key gets dropped. |
| return true; |
| } else if (!oldText.equals(getText().toString())) { |
| // FIXME: This makes the text work properly, but it |
| // does not pass down the key event, so it may not |
| // work for a textfield that has the type of |
| // behavior of GoogleSuggest. That said, it is |
| // unlikely that a site would combine the two in |
| // one textfield. |
| Spannable span = (Spannable) getText(); |
| int newStart = Selection.getSelectionStart(span); |
| int newEnd = Selection.getSelectionEnd(span); |
| mWebView.replaceTextfieldText(0, oldLength, span.toString(), |
| newStart, newEnd); |
| return true; |
| } |
| } |
| /* FIXME: |
| * In theory, we would like to send the events for the arrow keys. |
| * However, the TextView can arbitrarily change the selection (i.e. |
| * long press followed by using the trackball). Therefore, we keep |
| * in sync with the TextView via onSelectionChanged. If we also |
| * send the DOM event, we lose the correct selection. |
| if (isArrowKey) { |
| // Arrow key does not change the text, but we still want to send |
| // the DOM events. |
| sendDomEvent(event); |
| } |
| */ |
| return true; |
| } |
| // Ignore the key up event for newlines. This prevents |
| // multiple newlines in the native textarea. |
| if (mGotEnterDown && !down) { |
| return true; |
| } |
| // if it is a navigation key, pass it to WebView |
| if (isArrowKey) { |
| // WebView check the trackballtime in onKeyDown to avoid calling |
| // native from both trackball and key handling. As this is called |
| // from WebTextView, we always want WebView to check with native. |
| // Reset trackballtime to ensure it. |
| mWebView.resetTrackballTime(); |
| return down ? mWebView.onKeyDown(keyCode, event) : mWebView |
| .onKeyUp(keyCode, event); |
| } |
| return false; |
| } |
| |
| /** |
| * Create a fake touch up event at (x,y) with respect to this WebTextView. |
| * This is used by WebView to act as though a touch event which happened |
| * before we placed the WebTextView actually hit it, so that it can place |
| * the cursor accordingly. |
| */ |
| /* package */ void fakeTouchEvent(float x, float y) { |
| // We need to ensure that there is a Layout, since the Layout is used |
| // in determining where to place the cursor. |
| if (getLayout() == null) { |
| measure(mWidthSpec, mHeightSpec); |
| } |
| // Create a fake touch up, which is used to place the cursor. |
| MotionEvent ev = MotionEvent.obtain(0, 0, MotionEvent.ACTION_UP, |
| x, y, 0); |
| onTouchEvent(ev); |
| ev.recycle(); |
| } |
| |
| /** |
| * Determine whether this WebTextView currently represents the node |
| * represented by ptr. |
| * @param ptr Pointer to a node to compare to. |
| * @return boolean Whether this WebTextView already represents the node |
| * pointed to by ptr. |
| */ |
| /* package */ boolean isSameTextField(int ptr) { |
| return ptr == mNodePointer; |
| } |
| |
| @Override public InputConnection onCreateInputConnection( |
| EditorInfo outAttrs) { |
| InputConnection connection = super.onCreateInputConnection(outAttrs); |
| if (mWebView != null) { |
| // Use the name of the textfield + the url. Use backslash as an |
| // arbitrary separator. |
| outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" |
| + mWebView.getUrl(); |
| } |
| return connection; |
| } |
| |
| @Override |
| protected void onSelectionChanged(int selStart, int selEnd) { |
| if (mWebView != null) { |
| if (DebugFlags.WEB_TEXT_VIEW) { |
| Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart |
| + " selEnd=" + selEnd); |
| } |
| mWebView.setSelection(selStart, selEnd); |
| } |
| } |
| |
| @Override |
| protected void onTextChanged(CharSequence s,int start,int before,int count){ |
| super.onTextChanged(s, start, before, count); |
| String postChange = s.toString(); |
| // Prevent calls to setText from invoking onTextChanged (since this will |
| // mean we are on a different textfield). Also prevent the change when |
| // going from a textfield with a string of text to one with a smaller |
| // limit on text length from registering the onTextChanged event. |
| if (mPreChange == null || mPreChange.equals(postChange) || |
| (mMaxLength > -1 && mPreChange.length() > mMaxLength && |
| mPreChange.substring(0, mMaxLength).equals(postChange))) { |
| return; |
| } |
| mPreChange = postChange; |
| // This was simply a delete or a cut, so just delete the selection. |
| if (before > 0 && 0 == count) { |
| mWebView.deleteSelection(start, start + before); |
| // For this and all changes to the text, update our cache |
| updateCachedTextfield(); |
| return; |
| } |
| // Find the last character being replaced. If it can be represented by |
| // events, we will pass them to native (after replacing the beginning |
| // of the changed text), so we can see javascript events. |
| // Otherwise, replace the text being changed (including the last |
| // character) in the textfield. |
| TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); |
| KeyCharacterMap kmap = |
| KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); |
| KeyEvent[] events = kmap.getEvents(mCharacter); |
| boolean cannotUseKeyEvents = null == events; |
| int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; |
| if (count > 1 || cannotUseKeyEvents) { |
| String replace = s.subSequence(start, |
| start + count - charactersFromKeyEvents).toString(); |
| mWebView.replaceTextfieldText(start, start + before, replace, |
| start + count - charactersFromKeyEvents, |
| start + count - charactersFromKeyEvents); |
| } else { |
| // This corrects the selection which may have been affected by the |
| // trackball or auto-correct. |
| if (DebugFlags.WEB_TEXT_VIEW) { |
| Log.v(LOGTAG, "onTextChanged start=" + start |
| + " start + before=" + (start + before)); |
| } |
| mWebView.setSelection(start, start + before); |
| } |
| if (!cannotUseKeyEvents) { |
| int length = events.length; |
| for (int i = 0; i < length; i++) { |
| // We never send modifier keys to native code so don't send them |
| // here either. |
| if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { |
| sendDomEvent(events[i]); |
| } |
| } |
| } |
| updateCachedTextfield(); |
| } |
| |
| @Override |
| public boolean onTrackballEvent(MotionEvent event) { |
| if (isPopupShowing()) { |
| return super.onTrackballEvent(event); |
| } |
| if (event.getAction() != MotionEvent.ACTION_MOVE) { |
| return false; |
| } |
| // If the Cursor is not on the text input, webview should handle the |
| // trackball |
| if (!mWebView.nativeCursorMatchesFocus()) { |
| return mWebView.onTrackballEvent(event); |
| } |
| Spannable text = (Spannable) getText(); |
| MovementMethod move = getMovementMethod(); |
| if (move != null && getLayout() != null && |
| move.onTrackballEvent(this, text, event)) { |
| // Selection is changed in onSelectionChanged |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Remove this WebTextView from its host WebView, and return |
| * focus to the host. |
| */ |
| /* package */ void remove() { |
| // hide the soft keyboard when the edit text is out of focus |
| InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( |
| getWindowToken(), 0); |
| mWebView.removeView(this); |
| mWebView.requestFocus(); |
| } |
| |
| /* package */ void bringIntoView() { |
| if (getLayout() != null) { |
| bringPointIntoView(Selection.getSelectionEnd(getText())); |
| } |
| } |
| |
| /** |
| * Send the DOM events for the specified event. |
| * @param event KeyEvent to be translated into a DOM event. |
| */ |
| private void sendDomEvent(KeyEvent event) { |
| mWebView.passToJavaScript(getText().toString(), event); |
| } |
| |
| /** |
| * Always use this instead of setAdapter, as this has features specific to |
| * the WebTextView. |
| */ |
| public void setAdapterCustom(AutoCompleteAdapter adapter) { |
| if (adapter != null) { |
| setInputType(EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); |
| adapter.setTextView(this); |
| } |
| super.setAdapter(adapter); |
| } |
| |
| /** |
| * This is a special version of ArrayAdapter which changes its text size |
| * to match the text size of its host TextView. |
| */ |
| public static class AutoCompleteAdapter extends ArrayAdapter<String> { |
| private TextView mTextView; |
| |
| public AutoCompleteAdapter(Context context, ArrayList<String> entries) { |
| super(context, com.android.internal.R.layout |
| .search_dropdown_item_1line, entries); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public View getView(int position, View convertView, ViewGroup parent) { |
| TextView tv = |
| (TextView) super.getView(position, convertView, parent); |
| if (tv != null && mTextView != null) { |
| tv.setTextSize(mTextView.getTextSize()); |
| } |
| return tv; |
| } |
| |
| /** |
| * Set the TextView so we can match its text size. |
| */ |
| private void setTextView(TextView tv) { |
| mTextView = tv; |
| } |
| } |
| |
| /** |
| * Determine whether to use the system-wide password disguising method, |
| * or to use none. |
| * @param inPassword True if the textfield is a password field. |
| */ |
| /* package */ void setInPassword(boolean inPassword) { |
| if (inPassword) { |
| setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. |
| TYPE_TEXT_VARIATION_PASSWORD); |
| } |
| } |
| |
| /* package */ void setMaxLength(int maxLength) { |
| mMaxLength = maxLength; |
| if (-1 == maxLength) { |
| setFilters(NO_FILTERS); |
| } else { |
| setFilters(new InputFilter[] { |
| new InputFilter.LengthFilter(maxLength) }); |
| } |
| } |
| |
| /** |
| * Set the pointer for this node so it can be determined which node this |
| * WebTextView represents. |
| * @param ptr Integer representing the pointer to the node which this |
| * WebTextView represents. |
| */ |
| /* package */ void setNodePointer(int ptr) { |
| mNodePointer = ptr; |
| } |
| |
| /** |
| * Determine the position and size of WebTextView, and add it to the |
| * WebView's view heirarchy. All parameters are presumed to be in |
| * view coordinates. Also requests Focus and sets the cursor to not |
| * request to be in view. |
| * @param x x-position of the textfield. |
| * @param y y-position of the textfield. |
| * @param width width of the textfield. |
| * @param height height of the textfield. |
| */ |
| /* package */ void setRect(int x, int y, int width, int height) { |
| LayoutParams lp = (LayoutParams) getLayoutParams(); |
| if (null == lp) { |
| lp = new LayoutParams(width, height, x, y); |
| } else { |
| lp.x = x; |
| lp.y = y; |
| lp.width = width; |
| lp.height = height; |
| } |
| if (getParent() == null) { |
| mWebView.addView(this, lp); |
| } else { |
| setLayoutParams(lp); |
| } |
| // Set up a measure spec so a layout can always be recreated. |
| mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); |
| mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); |
| requestFocus(); |
| } |
| |
| /** |
| * Set whether this is a single-line textfield or a multi-line textarea. |
| * Textfields scroll horizontally, and do not handle the enter key. |
| * Textareas behave oppositely. |
| * Do NOT call this after calling setInPassword(true). This will result in |
| * removing the password input type. |
| */ |
| public void setSingleLine(boolean single) { |
| int inputType = EditorInfo.TYPE_CLASS_TEXT |
| | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; |
| if (!single) { |
| inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE |
| | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES |
| | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; |
| } |
| mSingle = single; |
| setHorizontallyScrolling(single); |
| setInputType(inputType); |
| } |
| |
| /** |
| * Set the text for this WebTextView, and set the selection to (start, end) |
| * @param text Text to go into this WebTextView. |
| * @param start Beginning of the selection. |
| * @param end End of the selection. |
| */ |
| /* package */ void setText(CharSequence text, int start, int end) { |
| mPreChange = text.toString(); |
| setText(text); |
| Spannable span = (Spannable) getText(); |
| int length = span.length(); |
| if (end > length) { |
| end = length; |
| } |
| if (start < 0) { |
| start = 0; |
| } else if (start > length) { |
| start = length; |
| } |
| if (DebugFlags.WEB_TEXT_VIEW) { |
| Log.v(LOGTAG, "setText start=" + start |
| + " end=" + end); |
| } |
| Selection.setSelection(span, start, end); |
| } |
| |
| /** |
| * Set the text to the new string, but use the old selection, making sure |
| * to keep it within the new string. |
| * @param text The new text to place in the textfield. |
| */ |
| /* package */ void setTextAndKeepSelection(String text) { |
| mPreChange = text.toString(); |
| Editable edit = (Editable) getText(); |
| edit.replace(0, edit.length(), text); |
| updateCachedTextfield(); |
| } |
| |
| /** |
| * Update the cache to reflect the current text. |
| */ |
| /* package */ void updateCachedTextfield() { |
| mWebView.updateCachedTextfield(getText().toString()); |
| } |
| } |
