FindDialog.java revision b7775e1e46a6c8ce0f07747d44c1b1792bb0ce1c 
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.res.Configuration;
21import android.os.Bundle;
22import android.os.Handler;
23import android.os.Message;
24import android.text.Editable;
25import android.text.Spannable;
26import android.text.TextWatcher;
27import android.view.Gravity;
28import android.view.KeyEvent;
29import android.view.View;
30import android.view.ViewGroup;
31import android.view.Window;
32import android.view.WindowManager;
33import android.webkit.WebView;
34import android.widget.EditText;
35import android.widget.TextView;
36
37/* package */ class FindDialog extends Dialog implements TextWatcher {
38    private WebView         mWebView;
39    private TextView        mMatches;
40    private BrowserActivity mBrowserActivity;
41
42    // Views with which the user can interact.
43    private View            mOk;
44    private EditText        mEditText;
45    private View            mNextButton;
46    private View            mPrevButton;
47    private View            mMatchesView;
48
49    private View.OnClickListener mFindListener = new View.OnClickListener() {
50        public void onClick(View v) {
51            findNext();
52        }
53    };
54
55    private View.OnClickListener mFindCancelListener  =
56            new View.OnClickListener() {
57        public void onClick(View v) {
58            dismiss();
59        }
60    };
61
62    private View.OnClickListener mFindPreviousListener  =
63            new View.OnClickListener() {
64        public void onClick(View v) {
65            if (mWebView == null) {
66                throw new AssertionError("No WebView for FindDialog::onClick");
67            }
68            mWebView.findNext(false);
69        }
70    };
71
72    private void disableButtons() {
73        mPrevButton.setEnabled(false);
74        mNextButton.setEnabled(false);
75        mPrevButton.setFocusable(false);
76        mNextButton.setFocusable(false);
77    }
78
79    /* package */ void setWebView(WebView webview) {
80        mWebView = webview;
81    }
82
83    /* package */ FindDialog(BrowserActivity context) {
84        super(context, R.style.FindDialogTheme);
85        mBrowserActivity = context;
86        setCanceledOnTouchOutside(true);
87    }
88
89    /* package */ void onConfigurationChanged(Configuration newConfig) {
90        // FIXME: Would like to call mWebView.findAll again, so that the
91        // matches would refresh, but the new picture has not yet been
92        // created, so it is too soon.
93        mEditText.getText().clear();
94    }
95
96    @Override
97    protected void onCreate(Bundle savedInstanceState) {
98        super.onCreate(savedInstanceState);
99
100        Window theWindow = getWindow();
101        theWindow.setGravity(Gravity.BOTTOM|Gravity.FILL_HORIZONTAL);
102
103        setContentView(R.layout.browser_find);
104
105        theWindow.setLayout(ViewGroup.LayoutParams.FILL_PARENT,
106                ViewGroup.LayoutParams.WRAP_CONTENT);
107
108        mEditText = (EditText) findViewById(R.id.edit);
109
110        View button = findViewById(R.id.next);
111        button.setOnClickListener(mFindListener);
112        mNextButton = button;
113
114        button = findViewById(R.id.previous);
115        button.setOnClickListener(mFindPreviousListener);
116        mPrevButton = button;
117
118        button = findViewById(R.id.done);
119        button.setOnClickListener(mFindCancelListener);
120        mOk = button;
121
122        mMatches = (TextView) findViewById(R.id.matches);
123        mMatchesView = findViewById(R.id.matches_view);
124        disableButtons();
125        theWindow.setSoftInputMode(
126                WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
127    }
128
129    public void dismiss() {
130        super.dismiss();
131        mBrowserActivity.closeFind();
132        mWebView.clearMatches();
133    }
134
135    @Override
136    public boolean dispatchKeyEvent(KeyEvent event) {
137        int code = event.getKeyCode();
138        boolean up = event.getAction() == KeyEvent.ACTION_UP;
139        switch (code) {
140            case KeyEvent.KEYCODE_DPAD_CENTER:
141            case KeyEvent.KEYCODE_ENTER:
142                if (!mEditText.hasFocus()) {
143                    break;
144                }
145                if (up) {
146                    findNext();
147                }
148                return true;
149            default:
150                break;
151        }
152        return super.dispatchKeyEvent(event);
153    }
154
155    private void findNext() {
156        if (mWebView == null) {
157            throw new AssertionError("No WebView for FindDialog::findNext");
158        }
159        mWebView.findNext(true);
160    }
161
162    public void show() {
163        super.show();
164        mEditText.requestFocus();
165        mEditText.setText("");
166        Spannable span = (Spannable) mEditText.getText();
167        span.setSpan(this, 0, span.length(),
168                     Spannable.SPAN_INCLUSIVE_INCLUSIVE);
169        mMatches.setText(R.string.zero);
170        disableButtons();
171    }
172
173    // TextWatcher methods
174    public void beforeTextChanged(CharSequence s,
175                                  int start,
176                                  int count,
177                                  int after) {
178    }
179
180    public void onTextChanged(CharSequence s,
181                              int start,
182                              int before,
183                              int count) {
184        if (mWebView == null) {
185            throw new AssertionError(
186                    "No WebView for FindDialog::onTextChanged");
187        }
188        CharSequence find = mEditText.getText();
189        if (0 == find.length()) {
190            disableButtons();
191            mWebView.clearMatches();
192            mMatchesView.setVisibility(View.INVISIBLE);
193        } else {
194            mMatchesView.setVisibility(View.VISIBLE);
195            int found = mWebView.findAll(find.toString());
196            mMatches.setText(Integer.toString(found));
197            if (found < 2) {
198                disableButtons();
199                if (found == 0) {
200                    mMatches.setText(R.string.zero);
201                }
202            } else {
203                mPrevButton.setFocusable(true);
204                mNextButton.setFocusable(true);
205                mPrevButton.setEnabled(true);
206                mNextButton.setEnabled(true);
207            }
208        }
209    }
210
211    public void afterTextChanged(Editable s) {
212    }
213}
214