Android example source code file (WebTextView.java)
The WebTextView.java Android example source code/*
* 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 com.android.internal.widget.EditableInputConnection;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
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.MovementMethod;
import android.text.method.Touch;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyCharacterMap;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
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;
private Drawable mBackground;
// Variables for keeping track of the touch down, to send to the WebView
// when a drag starts
private float mDragStartX;
private float mDragStartY;
private long mDragStartTime;
private boolean mDragSent;
// True if the most recent drag event has caused either the TextView to
// scroll or the web page to scroll. Gets reset after a touch down.
private boolean mScrolled;
// Whether or not a selection change was generated from webkit. If it was,
// we do not need to pass the selection back to webkit.
private boolean mFromWebKit;
// Whether or not a selection change was generated from the WebTextView
// gaining focus. If it is, we do not want to pass it to webkit. This
// selection comes from the MovementMethod, but we behave differently. If
// WebTextView gained focus from a touch, webkit will determine the
// selection.
private boolean mFromFocusChange;
// Whether or not a selection change was generated from setInputType. We
// do not want to pass this change to webkit.
private boolean mFromSetInputType;
private boolean mGotTouchDown;
// Keep track of whether a long press has happened. Only meaningful after
// an ACTION_DOWN MotionEvent
private boolean mHasPerformedLongClick;
private boolean mInSetTextAndKeepSelection;
// 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, null, com.android.internal.R.attr.webTextViewStyle);
mWebView = webView;
mMaxLength = -1;
}
@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();
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;
}
if (KeyEvent.KEYCODE_TAB == keyCode) {
if (down) {
onEditorAction(EditorInfo.IME_ACTION_NEXT);
}
return true;
}
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.centerKeyPressOnTextField();
}
// Pass to super to handle longpress.
return super.dispatchKeyEvent(event);
}
// 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;
}
/**
* 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 onDraw(Canvas canvas) {
// onDraw should only be called for password fields. If WebTextView is
// still drawing, but is no longer corresponding to a password field,
// remove it.
if (mWebView == null || !mWebView.nativeFocusCandidateIsPassword()
|| !isSameTextField(mWebView.nativeFocusCandidatePointer())) {
// Although calling remove() would seem to make more sense here,
// changing it to not be a password field will make it not draw.
// Other code will make sure that it is removed completely, but this
// way the user will not see it.
setInPassword(false);
} else {
super.onDraw(canvas);
}
}
@Override
public void onEditorAction(int actionCode) {
switch (actionCode) {
case EditorInfo.IME_ACTION_NEXT:
if (mWebView.nativeMoveCursorToNextTextInput()) {
// Since the cursor will no longer be in the same place as the
// focus, set the focus controller back to inactive
mWebView.setFocusControllerInactive();
// Preemptively rebuild the WebTextView, so that the action will
// be set properly.
mWebView.rebuildWebTextView();
setDefaultSelection();
mWebView.invalidate();
}
break;
case EditorInfo.IME_ACTION_DONE:
super.onEditorAction(actionCode);
break;
case EditorInfo.IME_ACTION_GO:
case EditorInfo.IME_ACTION_SEARCH:
// Send an enter and hide the soft keyboard
InputMethodManager.getInstance(mContext)
.hideSoftInputFromWindow(getWindowToken(), 0);
sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN,
KeyEvent.KEYCODE_ENTER));
sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP,
KeyEvent.KEYCODE_ENTER));
default:
break;
}
}
@Override
protected void onFocusChanged(boolean focused, int direction,
Rect previouslyFocusedRect) {
mFromFocusChange = true;
super.onFocusChanged(focused, direction, previouslyFocusedRect);
mFromFocusChange = false;
}
@Override
protected void onSelectionChanged(int selStart, int selEnd) {
if (mInSetTextAndKeepSelection) return;
// This code is copied from TextView.onDraw(). That code does not get
// executed, however, because the WebTextView does not draw, allowing
// webkit's drawing to show through.
InputMethodManager imm = InputMethodManager.peekInstance();
if (imm != null && imm.isActive(this)) {
Spannable sp = (Spannable) getText();
int candStart = EditableInputConnection.getComposingSpanStart(sp);
int candEnd = EditableInputConnection.getComposingSpanEnd(sp);
imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
}
if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType
&& 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;
if (0 == count) {
if (before > 0) {
// This was simply a delete or a cut, so just delete the
// selection.
mWebView.deleteSelection(start, start + before);
// For this and all changes to the text, update our cache
updateCachedTextfield();
}
// before should never be negative, so whether it was a cut
// (handled above), or before is 0, in which case nothing has
// changed, we should return.
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));
}
if (!mInSetTextAndKeepSelection) {
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 onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
super.onTouchEvent(event);
// This event may be the start of a drag, so store it to pass to the
// WebView if it is.
mDragStartX = event.getX();
mDragStartY = event.getY();
mDragStartTime = event.getEventTime();
mDragSent = false;
mScrolled = false;
mGotTouchDown = true;
mHasPerformedLongClick = false;
break;
case MotionEvent.ACTION_MOVE:
if (mHasPerformedLongClick) {
mGotTouchDown = false;
return false;
}
int slop = ViewConfiguration.get(mContext).getScaledTouchSlop();
Spannable buffer = getText();
int initialScrollX = Touch.getInitialScrollX(this, buffer);
int initialScrollY = Touch.getInitialScrollY(this, buffer);
super.onTouchEvent(event);
int dx = Math.abs(mScrollX - initialScrollX);
int dy = Math.abs(mScrollY - initialScrollY);
// Use a smaller slop when checking to see if we've moved far enough
// to scroll the text, because experimentally, slop has shown to be
// to big for the case of a small textfield.
int smallerSlop = slop/2;
if (dx > smallerSlop || dy > smallerSlop) {
if (mWebView != null) {
float maxScrollX = (float) Touch.getMaxScrollX(this,
getLayout(), mScrollY);
if (DebugFlags.WEB_TEXT_VIEW) {
Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y="
+ mScrollY + " maxX=" + maxScrollX);
}
mWebView.scrollFocusedTextInput(maxScrollX > 0 ?
mScrollX / maxScrollX : 0, mScrollY);
}
mScrolled = true;
cancelLongPress();
return true;
}
if (Math.abs((int) event.getX() - mDragStartX) < slop
&& Math.abs((int) event.getY() - mDragStartY) < slop) {
// If the user has not scrolled further than slop, we should not
// send the drag. Instead, do nothing, and when the user lifts
// their finger, we will change the selection.
return true;
}
if (mWebView != null) {
// Only want to set the initial state once.
if (!mDragSent) {
mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY,
mDragStartTime);
mDragSent = true;
}
boolean scrolled = mWebView.textFieldDrag(event);
if (scrolled) {
mScrolled = true;
cancelLongPress();
return true;
}
}
return false;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
if (mHasPerformedLongClick) {
mGotTouchDown = false;
return false;
}
if (!mScrolled) {
// If the page scrolled, or the TextView scrolled, we do not
// want to change the selection
cancelLongPress();
if (mGotTouchDown && mWebView != null) {
mWebView.touchUpOnTextField(event);
}
}
// Necessary for the WebView to reset its state
if (mWebView != null && mDragSent) {
mWebView.onTouchEvent(event);
}
mGotTouchDown = false;
break;
default:
break;
}
return true;
}
@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;
}
@Override
public boolean performLongClick() {
mHasPerformedLongClick = true;
return super.performLongClick();
}
/**
* 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(getInputType()
| 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;
}
}
/**
* Sets the selection when the user clicks on a textfield or textarea with
* the trackball or center key, or starts typing into it without clicking on
* it.
*/
/* package */ void setDefaultSelection() {
Spannable text = (Spannable) getText();
int selection = mSingle ? text.length() : 0;
if (Selection.getSelectionStart(text) == selection
&& Selection.getSelectionEnd(text) == selection) {
// The selection of the UI copy is set correctly, but the
// WebTextView still needs to inform the webkit thread to set the
// selection. Normally that is done in onSelectionChanged, but
// onSelectionChanged will not be called because the UI copy is not
// changing. (This can happen when the WebTextView takes focus.
// That onSelectionChanged was blocked because the selection set
// when focusing is not necessarily the desirable selection for
// WebTextView.)
if (mWebView != null) {
mWebView.setSelection(selection, selection);
}
} else {
Selection.setSelection(text, selection, selection);
}
}
/**
* 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);
createBackground();
}
// For password fields, draw the WebTextView. For others, just show
// webkit's drawing.
setWillNotDraw(!inPassword);
setBackgroundDrawable(inPassword ? mBackground : null);
// For non-password fields, avoid the invals from TextView's blinking
// cursor
setCursorVisible(inPassword);
}
/**
* Private class used for the background of a password textfield.
*/
private static class OutlineDrawable extends Drawable {
public void draw(Canvas canvas) {
Rect bounds = getBounds();
Paint paint = new Paint();
paint.setAntiAlias(true);
// Draw the background.
paint.setColor(Color.WHITE);
canvas.drawRect(bounds, paint);
// Draw the outline.
paint.setStyle(Paint.Style.STROKE);
paint.setColor(Color.BLACK);
canvas.drawRect(bounds, paint);
}
// Always want it to be opaque.
public int getOpacity() {
return PixelFormat.OPAQUE;
}
// These are needed because they are abstract in Drawable.
public void setAlpha(int alpha) { }
public void setColorFilter(ColorFilter cf) { }
}
/**
* Create a background for the WebTextView and set up the paint for drawing
* the text. This way, we can see the password transformation of the
* system, which (optionally) shows the actual text before changing to dots.
* The background is necessary to hide the webkit-drawn text beneath.
*/
private void createBackground() {
if (mBackground != null) {
return;
}
mBackground = new OutlineDrawable();
setGravity(Gravity.CENTER_VERTICAL);
// 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);
// Set the text color to black, regardless of the theme. This ensures
// that other applications that use embedded WebViews will properly
// display the text in password textfields.
setTextColor(Color.BLACK);
}
@Override
public void setInputType(int type) {
mFromSetInputType = true;
super.setInputType(type);
mFromSetInputType = false;
}
private 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);
}
/**
* Set the selection, and disable our onSelectionChanged action.
*/
/* package */ void setSelectionFromWebKit(int start, int end) {
if (start < 0 || end < 0) return;
Spannable text = (Spannable) getText();
int length = text.length();
if (start > length || end > length) return;
mFromWebKit = true;
Selection.setSelection(text, start, end);
mFromWebKit = false;
}
/**
* 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();
int selStart = Selection.getSelectionStart(edit);
int selEnd = Selection.getSelectionEnd(edit);
mInSetTextAndKeepSelection = true;
edit.replace(0, edit.length(), text);
int newLength = edit.length();
if (selStart > newLength) selStart = newLength;
if (selEnd > newLength) selEnd = newLength;
Selection.setSelection(edit, selStart, selEnd);
mInSetTextAndKeepSelection = false;
updateCachedTextfield();
}
/**
* Called by WebView.rebuildWebTextView(). Based on the type of the <input>
* element, set up the WebTextView, its InputType, and IME Options properly.
* @param type int corresponding to enum "type" defined in WebView.cpp.
* Does not correspond to HTMLInputElement::InputType so this
* is unaffected if that changes, and also because that has no
* type corresponding to textarea (which is its own tag).
*/
/* package */ void setType(int type) {
if (mWebView == null) return;
boolean single = true;
boolean inPassword = false;
int maxLength = -1;
int inputType = EditorInfo.TYPE_CLASS_TEXT;
if (mWebView.nativeFocusCandidateHasNextTextfield()) {
inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT;
}
int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI
| EditorInfo.IME_FLAG_NO_FULLSCREEN;
switch (type) {
case 0: // NORMAL_TEXT_FIELD
imeOptions |= EditorInfo.IME_ACTION_GO;
break;
case 1: // TEXT_AREA
single = false;
inputType = EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE
| EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES
| EditorInfo.TYPE_CLASS_TEXT
| EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT;
imeOptions |= EditorInfo.IME_ACTION_NONE;
break;
case 2: // PASSWORD
inPassword = true;
imeOptions |= EditorInfo.IME_ACTION_GO;
break;
case 3: // SEARCH
imeOptions |= EditorInfo.IME_ACTION_SEARCH;
break;
case 4: // EMAIL
// TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents EMAIL_ADDRESS
// from working, so exclude it for now.
imeOptions |= EditorInfo.IME_ACTION_GO;
break;
case 5: // NUMBER
inputType |= EditorInfo.TYPE_CLASS_NUMBER;
// Number and telephone do not have both a Tab key and an
// action, so set the action to NEXT
imeOptions |= EditorInfo.IME_ACTION_NEXT;
break;
case 6: // TELEPHONE
inputType |= EditorInfo.TYPE_CLASS_PHONE;
imeOptions |= EditorInfo.IME_ACTION_NEXT;
break;
case 7: // URL
// TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so
// exclude it for now.
imeOptions |= EditorInfo.IME_ACTION_GO;
break;
default:
imeOptions |= EditorInfo.IME_ACTION_GO;
break;
}
setHint(null);
if (single) {
mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(),
mNodePointer);
maxLength = mWebView.nativeFocusCandidateMaxLength();
if (type != 2 /* PASSWORD */) {
String name = mWebView.nativeFocusCandidateName();
if (name != null && name.length() > 0) {
mWebView.requestFormData(name, mNodePointer);
}
}
}
mSingle = single;
setMaxLength(maxLength);
setHorizontallyScrolling(single);
setInputType(inputType);
setImeOptions(imeOptions);
setInPassword(inPassword);
AutoCompleteAdapter adapter = null;
setAdapterCustom(adapter);
}
/**
* Update the cache to reflect the current text.
*/
/* package */ void updateCachedTextfield() {
mWebView.updateCachedTextfield(getText().toString());
}
@Override
public boolean requestRectangleOnScreen(Rect rectangle) {
// don't scroll while in zoom animation. When it is done, we will adjust
// the WebTextView if it is in editing mode.
if (!mWebView.inAnimateZoom()) {
return super.requestRectangleOnScreen(rectangle);
}
return false;
}
}
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