FindDialog.java revision 8963b29db97943e82f8780b3ef65a40d788634b7 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.browser;
18
19import android.app.Dialog;
20import android.content.Context;
21import android.content.res.Configuration;
22import android.os.Bundle;
23import android.os.Handler;
24import android.os.Message;
25import android.text.Editable;
26import android.text.Spannable;
27import android.text.TextWatcher;
28import android.view.Gravity;
29import android.view.KeyEvent;
30import android.view.View;
31import android.view.ViewGroup;
32import android.view.Window;
33import android.view.WindowManager;
34import android.view.inputmethod.InputMethodManager;
35import android.webkit.WebView;
36import android.widget.EditText;
37import android.widget.TextView;
38
39/* package */ class FindDialog extends Dialog implements TextWatcher {
40    private WebView         mWebView;
41    private TextView        mMatches;
42    private BrowserActivity mBrowserActivity;
43
44    // Views with which the user can interact.
45    private View            mOk;
46    private EditText        mEditText;
47    private View            mNextButton;
48    private View            mPrevButton;
49    private View            mMatchesView;
50
51    private View.OnClickListener mFindListener = new View.OnClickListener() {
52        public void onClick(View v) {
53            findNext();
54        }
55    };
56
57    private View.OnClickListener mFindCancelListener  =
58            new View.OnClickListener() {
59        public void onClick(View v) {
60            dismiss();
61        }
62    };
63
64    private View.OnClickListener mFindPreviousListener  =
65            new View.OnClickListener() {
66        public void onClick(View v) {
67            if (mWebView == null) {
68                throw new AssertionError("No WebView for FindDialog::onClick");
69            }
70            mWebView.findNext(false);
71            hideSoftInput();
72        }
73    };
74
75    /*
76     * Remove the soft keyboard from the screen.
77     */
78    private void hideSoftInput() {
79        InputMethodManager imm = (InputMethodManager)
80                mBrowserActivity.getSystemService(Context.INPUT_METHOD_SERVICE);
81        imm.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);
82    }
83
84    private void disableButtons() {
85        mPrevButton.setEnabled(false);
86        mNextButton.setEnabled(false);
87        mPrevButton.setFocusable(false);
88        mNextButton.setFocusable(false);
89    }
90
91    /* package */ void setWebView(WebView webview) {
92        mWebView = webview;
93    }
94
95    /* package */ FindDialog(BrowserActivity context) {
96        super(context, R.style.FindDialogTheme);
97        mBrowserActivity = context;
98        setCanceledOnTouchOutside(true);
99    }
100
101    /* package */ void onConfigurationChanged(Configuration newConfig) {
102        // FIXME: Would like to call mWebView.findAll again, so that the
103        // matches would refresh, but the new picture has not yet been
104        // created, so it is too soon.
105        mEditText.getText().clear();
106    }
107
108    @Override
109    protected void onCreate(Bundle savedInstanceState) {
110        super.onCreate(savedInstanceState);
111
112        Window theWindow = getWindow();
113        theWindow.setGravity(Gravity.BOTTOM|Gravity.FILL_HORIZONTAL);
114
115        setContentView(R.layout.browser_find);
116
117        theWindow.setLayout(ViewGroup.LayoutParams.FILL_PARENT,
118                ViewGroup.LayoutParams.WRAP_CONTENT);
119
120        mEditText = (EditText) findViewById(R.id.edit);
121
122        View button = findViewById(R.id.next);
123        button.setOnClickListener(mFindListener);
124        mNextButton = button;
125
126        button = findViewById(R.id.previous);
127        button.setOnClickListener(mFindPreviousListener);
128        mPrevButton = button;
129
130        button = findViewById(R.id.done);
131        button.setOnClickListener(mFindCancelListener);
132        mOk = button;
133
134        mMatches = (TextView) findViewById(R.id.matches);
135        mMatchesView = findViewById(R.id.matches_view);
136        disableButtons();
137        theWindow.setSoftInputMode(
138                WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
139    }
140
141    public void dismiss() {
142        super.dismiss();
143        mBrowserActivity.closeFind();
144        mWebView.clearMatches();
145    }
146
147    @Override
148    public boolean dispatchKeyEvent(KeyEvent event) {
149        int code = event.getKeyCode();
150        boolean up = event.getAction() == KeyEvent.ACTION_UP;
151        switch (code) {
152            case KeyEvent.KEYCODE_DPAD_CENTER:
153            case KeyEvent.KEYCODE_ENTER:
154                if (!mEditText.hasFocus()) {
155                    break;
156                }
157                if (up) {
158                    findNext();
159                }
160                return true;
161            default:
162                break;
163        }
164        return super.dispatchKeyEvent(event);
165    }
166
167    private void findNext() {
168        if (mWebView == null) {
169            throw new AssertionError("No WebView for FindDialog::findNext");
170        }
171        mWebView.findNext(true);
172        hideSoftInput();
173    }
174
175    public void show() {
176        super.show();
177        mEditText.requestFocus();
178        mEditText.setText("");
179        Spannable span = (Spannable) mEditText.getText();
180        span.setSpan(this, 0, span.length(),
181                     Spannable.SPAN_INCLUSIVE_INCLUSIVE);
182        setMatchesFound(0);
183        disableButtons();
184    }
185
186    // TextWatcher methods
187    public void beforeTextChanged(CharSequence s,
188                                  int start,
189                                  int count,
190                                  int after) {
191    }
192
193    public void onTextChanged(CharSequence s,
194                              int start,
195                              int before,
196                              int count) {
197        if (mWebView == null) {
198            throw new AssertionError(
199                    "No WebView for FindDialog::onTextChanged");
200        }
201        CharSequence find = mEditText.getText();
202        if (0 == find.length()) {
203            disableButtons();
204            mWebView.clearMatches();
205            mMatchesView.setVisibility(View.INVISIBLE);
206        } else {
207            mMatchesView.setVisibility(View.VISIBLE);
208            int found = mWebView.findAll(find.toString());
209            setMatchesFound(found);
210            if (found < 2) {
211                disableButtons();
212                if (found == 0) {
213                    setMatchesFound(0);
214                }
215            } else {
216                mPrevButton.setFocusable(true);
217                mNextButton.setFocusable(true);
218                mPrevButton.setEnabled(true);
219                mNextButton.setEnabled(true);
220            }
221        }
222    }
223
224    private void setMatchesFound(int found) {
225        String template = mBrowserActivity.getResources().
226                getQuantityString(R.plurals.matches_found, found, found);
227
228        mMatches.setText(template);
229    }
230
231    public void afterTextChanged(Editable s) {
232    }
233}
234