| /* |
| * 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.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.graphics.drawable.ColorDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.LayerDrawable; |
| import android.graphics.drawable.ShapeDrawable; |
| import android.graphics.drawable.shapes.RectShape; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.text.Editable; |
| import android.text.InputFilter; |
| import android.text.Selection; |
| import android.text.Spannable; |
| import android.text.TextPaint; |
| import android.text.TextUtils; |
| import android.text.method.MetaKeyKeyListener; |
| import android.text.method.MovementMethod; |
| import android.text.method.PasswordTransformationMethod; |
| import android.text.method.TextKeyListener; |
| import android.view.KeyCharacterMap; |
| import android.view.KeyEvent; |
| import android.view.MotionEvent; |
| import android.view.View.MeasureSpec; |
| import android.view.ViewConfiguration; |
| import android.widget.AbsoluteLayout.LayoutParams; |
| import android.widget.AutoCompleteTextView; |
| |
| /** |
| * TextDialog is a specialized version of EditText used by WebView |
| * to overlay html textfields (and textareas) to use our standard |
| * text editing. |
| */ |
| /* package */ class TextDialog extends AutoCompleteTextView { |
| |
| 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; |
| // Determines whether we allow calls to requestRectangleOnScreen to |
| // propagate. We only want to scroll if the user is typing. If the |
| // user is simply navigating through a textfield, we do not want to |
| // scroll. |
| private boolean mScrollToAccommodateCursor; |
| 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]; |
| // The time of the last enter down, so we know whether to perform a long |
| // press. |
| private long mDownTime; |
| |
| private boolean mTrackballDown = false; |
| private static int LONGPRESS = 1; |
| private Handler mHandler = new Handler() { |
| public void handleMessage(Message msg) { |
| if (msg.what == LONGPRESS) { |
| if (mTrackballDown) { |
| performLongClick(); |
| mTrackballDown = false; |
| } |
| } |
| } |
| }; |
| |
| /** |
| * Create a new TextDialog. |
| * @param context The Context for this TextDialog. |
| * @param webView The WebView that created this. |
| */ |
| /* package */ TextDialog(Context context, WebView webView) { |
| super(context); |
| mWebView = webView; |
| ShapeDrawable background = new ShapeDrawable(new RectShape()); |
| Paint shapePaint = background.getPaint(); |
| shapePaint.setStyle(Paint.Style.STROKE); |
| ColorDrawable color = new ColorDrawable(Color.WHITE); |
| Drawable[] array = new Drawable[2]; |
| array[0] = color; |
| array[1] = background; |
| LayerDrawable layers = new LayerDrawable(array); |
| // Hide WebCore's text behind this and allow the WebView |
| // to draw its own focusring. |
| setBackgroundDrawable(layers); |
| // Align the text better with the text behind it, so moving |
| // off of the textfield will not appear to move the text. |
| setPadding(3, 2, 0, 0); |
| mMaxLength = -1; |
| // Turn on subpixel text, and turn off kerning, so it better matches |
| // the text in webkit. |
| TextPaint paint = getPaint(); |
| int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | |
| Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; |
| paint.setFlags(flags); |
| } |
| |
| @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; |
| } |
| |
| // For single-line textfields, return key should not be handled |
| // here. Instead, the WebView is passed the key up, so it may fire a |
| // submit/onClick. |
| // Center key should always be passed to a potential onClick |
| if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode) |
| || KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { |
| if (isPopupShowing()) { |
| super.dispatchKeyEvent(event); |
| return true; |
| } |
| if (down) { |
| if (event.getRepeatCount() == 0) { |
| mGotEnterDown = true; |
| mDownTime = event.getEventTime(); |
| // Send the keydown when the up comes, so that we have |
| // a chance to handle a long press. |
| } else if (mGotEnterDown && event.getEventTime() - mDownTime > |
| ViewConfiguration.getLongPressTimeout()) { |
| performLongClick(); |
| mGotEnterDown = false; |
| } |
| } else if (mGotEnterDown) { |
| mGotEnterDown = false; |
| if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { |
| mWebView.shortPressOnTextField(); |
| return true; |
| } |
| sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); |
| sendDomEvent(event); |
| } |
| return true; |
| } |
| // 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 TextDialog 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. |
| boolean isArrowKey; |
| switch(keyCode) { |
| case KeyEvent.KEYCODE_DPAD_LEFT: |
| case KeyEvent.KEYCODE_DPAD_RIGHT: |
| case KeyEvent.KEYCODE_DPAD_UP: |
| case KeyEvent.KEYCODE_DPAD_DOWN: |
| isArrowKey = true; |
| break; |
| case KeyEvent.KEYCODE_DPAD_CENTER: |
| case KeyEvent.KEYCODE_ENTER: |
| // For multi-line text boxes, newlines and dpad center will |
| // trigger onTextChanged for key down (which will send both |
| // key up and key down) but not key up. |
| mGotEnterDown = true; |
| default: |
| isArrowKey = false; |
| break; |
| } |
| if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { |
| if (oldEnd == oldStart) { |
| // Return true so the key gets dropped. |
| mScrollToAccommodateCursor = true; |
| 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); |
| mScrollToAccommodateCursor = true; |
| return true; |
| } |
| } |
| if (isArrowKey) { |
| // Arrow key does not change the text, but we still want to send |
| // the DOM events. |
| sendDomEvent(event); |
| } |
| mScrollToAccommodateCursor = true; |
| return true; |
| } |
| // FIXME: TextViews return false for up and down key events even though |
| // they change the selection. Since we don't want the get out of sync |
| // with WebCore's notion of the current selection, reset the selection |
| // to what it was before the key event. |
| Selection.setSelection(text, oldStart, oldEnd); |
| // Ignore the key up event for newlines or dpad center. This prevents |
| // multiple newlines in the native textarea. |
| if (mGotEnterDown && !down) { |
| return true; |
| } |
| // WebView check the trackballtime in onKeyDown to avoid calling native |
| // from both trackball and key handling. As this is called from |
| // TextDialog, 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); |
| } |
| |
| /** |
| * Determine whether this TextDialog currently represents the node |
| * represented by ptr. |
| * @param ptr Pointer to a node to compare to. |
| * @return boolean Whether this TextDialog already represents the node |
| * pointed to by ptr. |
| */ |
| /* package */ boolean isSameTextField(int ptr) { |
| return ptr == mNodePointer; |
| } |
| |
| @Override |
| public boolean onPreDraw() { |
| if (getLayout() == null) { |
| measure(mWidthSpec, mHeightSpec); |
| } |
| return super.onPreDraw(); |
| } |
| |
| @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; |
| } |
| // In this case, replace before with all but the last character of the |
| // new text. |
| if (count > 1) { |
| String replace = s.subSequence(start, start + count - 1).toString(); |
| mWebView.replaceTextfieldText(start, start + before, replace, |
| start + count - 1, start + count - 1); |
| } else { |
| // This corrects the selection which may have been affected by the |
| // trackball or auto-correct. |
| mWebView.setSelection(start, start + before); |
| } |
| // Whether the text to be added is only one character, or we already |
| // added all but the last character, we now figure out the DOM events |
| // for the last character, and pass them down. |
| TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); |
| // We only care about the events that translate directly into |
| // characters. Should we be using KeyCharacterMap.BUILT_IN_KEYBOARD? |
| // The comment makes it sound like it may not be directly related to |
| // the keys. However, KeyCharacterMap.ALPHA says it has "maybe some |
| // numbers." Not sure if that will have the numbers we may need. |
| KeyCharacterMap kmap = |
| KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); |
| KeyEvent[] events = kmap.getEvents(mCharacter); |
| updateCachedTextfield(); |
| if (null == events) { |
| return; |
| } |
| 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]); |
| } |
| } |
| } |
| |
| @Override |
| public boolean onTrackballEvent(MotionEvent event) { |
| if (isPopupShowing()) { |
| return super.onTrackballEvent(event); |
| } |
| int action = event.getAction(); |
| switch (action) { |
| case MotionEvent.ACTION_DOWN: |
| if (!mTrackballDown) { |
| mTrackballDown = true; |
| mHandler.sendEmptyMessageDelayed(LONGPRESS, |
| ViewConfiguration.getLongPressTimeout()); |
| } |
| return true; |
| case MotionEvent.ACTION_UP: |
| if (mTrackballDown) { |
| mWebView.shortPressOnTextField(); |
| mTrackballDown = false; |
| mHandler.removeMessages(LONGPRESS); |
| } |
| return true; |
| case MotionEvent.ACTION_CANCEL: |
| mTrackballDown = false; |
| return true; |
| case MotionEvent.ACTION_MOVE: |
| // fall through |
| } |
| Spannable text = (Spannable) getText(); |
| MovementMethod move = getMovementMethod(); |
| if (move != null && getLayout() != null && |
| move.onTrackballEvent(this, text, event)) { |
| // Need to pass down the selection, which has changed. |
| // FIXME: This should work, but does not, so we set the selection |
| // in onTextChanged. |
| //int start = Selection.getSelectionStart(text); |
| //int end = Selection.getSelectionEnd(text); |
| //mWebView.setSelection(start, end); |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Remove this TextDialog from its host WebView, and return |
| * focus to the host. |
| */ |
| /* package */ void remove() { |
| mWebView.removeView(this); |
| mWebView.requestFocus(); |
| } |
| |
| @Override |
| public boolean requestRectangleOnScreen(Rect rectangle) { |
| if (mScrollToAccommodateCursor) { |
| return super.requestRectangleOnScreen(rectangle); |
| } |
| return false; |
| } |
| |
| /** |
| * 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); |
| } |
| |
| /** |
| * 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) { |
| PasswordTransformationMethod method; |
| if (inPassword) { |
| method = PasswordTransformationMethod.getInstance(); |
| } else { |
| method = null; |
| } |
| setTransformationMethod(method); |
| } |
| |
| /* 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 |
| * TextDialog represents. |
| * @param ptr Integer representing the pointer to the node which this |
| * TextDialog represents. |
| */ |
| /* package */ void setNodePointer(int ptr) { |
| mNodePointer = ptr; |
| } |
| |
| /** |
| * Determine the position and size of TextDialog, 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); |
| mScrollToAccommodateCursor = false; |
| 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. |
| */ |
| public void setSingleLine(boolean single) { |
| if (mSingle != single) { |
| TextKeyListener.Capitalize cap; |
| if (single) { |
| cap = TextKeyListener.Capitalize.NONE; |
| } else { |
| cap = TextKeyListener.Capitalize.SENTENCES; |
| } |
| setKeyListener(TextKeyListener.getInstance(!single, cap)); |
| mSingle = single; |
| setHorizontallyScrolling(single); |
| } |
| } |
| |
| /** |
| * Set the text for this TextDialog, and set the selection to (start, end) |
| * @param text Text to go into this TextDialog. |
| * @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; |
| } |
| 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); |
| } |
| |
| /** |
| * Update the cache to reflect the current text. |
| */ |
| /* package */ void updateCachedTextfield() { |
| mWebView.updateCachedTextfield(getText().toString()); |
| } |
| } |