gecko/mobile/android/base/FormAssistPopup.java
2012-03-06 14:01:02 -08:00

314 lines
12 KiB
Java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Android code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Margaret Leibovic <margaret.leibovic@gmail.com>
* Sriram Ramasubramanian <sriram@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.gecko;
import org.mozilla.gecko.gfx.FloatSize;
import android.content.Context;
import android.util.Log;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Pair;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.inputmethod.InputMethodManager;
import android.widget.ArrayAdapter;
import android.widget.AdapterView;
import android.widget.RelativeLayout;
import android.widget.ListView;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class FormAssistPopup extends ListView implements GeckoEventListener {
private Context mContext;
private RelativeLayout.LayoutParams mLayout;
private int mWidth;
private int mHeight;
private Animation mAnimation;
private static final String LOGTAG = "FormAssistPopup";
private static int sMinWidth = 0;
private static int sRowHeight = 0;
private static final int POPUP_MIN_WIDTH_IN_DPI = 200;
private static final int POPUP_ROW_HEIGHT_IN_DPI = 32;
private static enum PopupType { NONE, AUTOCOMPLETE, VALIDATION };
// Keep track of the type of popup we're currently showing
private PopupType mTypeShowing = PopupType.NONE;
public FormAssistPopup(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
mAnimation = AnimationUtils.loadAnimation(context, R.anim.grow_fade_in);
mAnimation.setDuration(75);
setFocusable(false);
setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parentView, View view, int position, long id) {
if (mTypeShowing.equals(PopupType.AUTOCOMPLETE)) {
// Use the value stored with the autocomplete view, not the label text,
// since they can be different.
TextView textView = (TextView) view;
String value = (String) textView.getTag();
GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("FormAssist:AutoComplete", value));
hide();
}
}
});
GeckoAppShell.registerGeckoEventListener("FormAssist:AutoComplete", this);
GeckoAppShell.registerGeckoEventListener("FormAssist:ValidationMessage", this);
GeckoAppShell.registerGeckoEventListener("FormAssist:Hide", this);
}
public void handleMessage(String event, JSONObject message) {
try {
if (event.equals("FormAssist:AutoComplete")) {
handleAutoCompleteMessage(message);
} else if (event.equals("FormAssist:ValidationMessage")) {
handleValidationMessage(message);
} else if (event.equals("FormAssist:Hide")) {
handleHideMessage(message);
}
} catch (Exception e) {
Log.e(LOGTAG, "Exception handling message \"" + event + "\":", e);
}
}
private void handleAutoCompleteMessage(JSONObject message) throws JSONException {
final JSONArray suggestions = message.getJSONArray("suggestions");
final JSONArray rect = message.getJSONArray("rect");
final double zoom = message.getDouble("zoom");
GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
public void run() {
showAutoCompleteSuggestions(suggestions, rect, zoom);
}
});
}
private void handleValidationMessage(JSONObject message) throws JSONException {
final String validationMessage = message.getString("validationMessage");
final JSONArray rect = message.getJSONArray("rect");
final double zoom = message.getDouble("zoom");
GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
public void run() {
showValidationMessage(validationMessage, rect, zoom);
}
});
}
private void handleHideMessage(JSONObject message) {
GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
public void run() {
hide();
}
});
}
private void showAutoCompleteSuggestions(JSONArray suggestions, JSONArray rect, double zoom) {
AutoCompleteListAdapter adapter = new AutoCompleteListAdapter(mContext, R.layout.autocomplete_list_item);
adapter.populateSuggestionsList(suggestions);
setAdapter(adapter);
if (positionAndShowPopup(rect, zoom))
mTypeShowing = PopupType.AUTOCOMPLETE;
}
// TODO: style the validation message popup differently (bug 731654)
private void showValidationMessage(String validationMessage, JSONArray rect, double zoom) {
ArrayAdapter<String> adapter = new ArrayAdapter<String>(mContext, R.layout.autocomplete_list_item);
adapter.add(validationMessage);
setAdapter(adapter);
if (positionAndShowPopup(rect, zoom))
mTypeShowing = PopupType.VALIDATION;
}
// Returns true if the popup is successfully shown, false otherwise
public boolean positionAndShowPopup(JSONArray rect, double zoom) {
// Don't show the form assist popup when using fullscreen VKB
InputMethodManager imm =
(InputMethodManager) GeckoApp.mAppContext.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm.isFullscreenMode())
return false;
if (!isShown()) {
setVisibility(View.VISIBLE);
startAnimation(mAnimation);
}
if (mLayout == null) {
mLayout = (RelativeLayout.LayoutParams) getLayoutParams();
mWidth = mLayout.width;
mHeight = mLayout.height;
}
int left = 0;
int top = 0;
int width = 0;
int height = 0;
try {
left = (int) (rect.getDouble(0) * zoom);
top = (int) (rect.getDouble(1) * zoom);
width = (int) (rect.getDouble(2) * zoom);
height = (int) (rect.getDouble(3) * zoom);
} catch (JSONException e) { }
int listWidth = mWidth;
int listHeight = mHeight;
int listLeft = left < 0 ? 0 : left;
int listTop = top + height;
FloatSize viewport = GeckoApp.mAppContext.getLayerController().getViewportSize();
// Late initializing variable to allow DisplayMetrics not to be null and avoid NPE
if (sMinWidth == 0) {
DisplayMetrics metrics = new DisplayMetrics();
GeckoApp.mAppContext.getWindowManager().getDefaultDisplay().getMetrics(metrics);
sMinWidth = (int) (POPUP_MIN_WIDTH_IN_DPI * metrics.density);
sRowHeight = (int) (POPUP_ROW_HEIGHT_IN_DPI * metrics.density);
}
// If the textbox is smaller than the screen-width,
// shrink the list's width
if ((left + width) < viewport.width)
listWidth = left < 0 ? left + width : width;
// listWidth can be negative if it is a constant - FILL_PARENT or MATCH_PARENT
if (listWidth >= 0 && listWidth < sMinWidth) {
listWidth = sMinWidth;
if ((listLeft + listWidth) > viewport.width)
listLeft = (int) (viewport.width - listWidth);
}
listHeight = sRowHeight * getAdapter().getCount();
// The text box doesnt fit below
if ((listTop + listHeight) > viewport.height) {
// Find where the maximum space is, and fit it there
if ((viewport.height - listTop) > top) {
// Shrink the height to fit it below the text-box
listHeight = (int) (viewport.height - listTop);
} else {
if (listHeight < top) {
// No shrinking needed to fit on top
listTop = (top - listHeight);
} else {
// Shrink to available space on top
listTop = 0;
listHeight = top;
}
}
}
mLayout = new RelativeLayout.LayoutParams(listWidth, listHeight);
mLayout.setMargins(listLeft, listTop, 0, 0);
setLayoutParams(mLayout);
requestLayout();
return true;
}
public void hide() {
if (isShown()) {
setVisibility(View.GONE);
mTypeShowing = PopupType.NONE;
GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("FormAssist:Hidden", null));
}
}
private class AutoCompleteListAdapter extends ArrayAdapter<Pair<String, String>> {
private LayoutInflater mInflater;
private int mTextViewResourceId;
public AutoCompleteListAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mTextViewResourceId = textViewResourceId;
}
// This method takes an array of autocomplete suggestions with label/value properties
// and adds label/value Pair objects to the array that backs the adapter.
public void populateSuggestionsList(JSONArray suggestions) {
try {
for (int i = 0; i < suggestions.length(); i++) {
JSONObject suggestion = (JSONObject) suggestions.get(i);
String label = suggestion.getString("label");
String value = suggestion.getString("value");
add(new Pair<String, String>(label, value));
}
} catch (JSONException e) {
Log.e(LOGTAG, "JSONException: " + e);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null)
convertView = mInflater.inflate(mTextViewResourceId, null);
Pair<String, String> item = getItem(position);
TextView itemView = (TextView) convertView;
// Set the text with the suggestion label
itemView.setText(item.first);
// Set a tag with the suggestion value
itemView.setTag(item.second);
return convertView;
}
}
}