Leon Scroggins | fe026bd | 2010-08-24 14:16:09 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | |
| 17 | package android.webkit; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.content.res.Resources; |
| 21 | import android.text.Editable; |
| 22 | import android.text.Selection; |
| 23 | import android.text.Spannable; |
| 24 | import android.text.TextWatcher; |
| 25 | import android.webkit.WebView; |
| 26 | import android.widget.EditText; |
| 27 | import android.widget.TextView; |
| 28 | import android.view.ActionMode; |
| 29 | import android.view.LayoutInflater; |
| 30 | import android.view.Menu; |
| 31 | import android.view.MenuInflater; |
| 32 | import android.view.MenuItem; |
| 33 | import android.view.View; |
| 34 | import android.view.inputmethod.InputMethodManager; |
| 35 | |
| 36 | class FindActionModeCallback implements ActionMode.Callback, TextWatcher, |
| 37 | View.OnLongClickListener { |
| 38 | private View mCustomView; |
| 39 | private EditText mEditText; |
| 40 | private TextView mMatches; |
| 41 | private WebView mWebView; |
| 42 | private InputMethodManager mInput; |
| 43 | private Resources mResources; |
| 44 | private boolean mMatchesFound; |
| 45 | private int mNumberOfMatches; |
| 46 | private View mTitleBar; |
Leon Scroggins | 05919f2 | 2010-09-14 17:22:36 -0400 | [diff] [blame] | 47 | private ActionMode mActionMode; |
Leon Scroggins | fe026bd | 2010-08-24 14:16:09 -0400 | [diff] [blame] | 48 | |
| 49 | FindActionModeCallback(Context context) { |
| 50 | mCustomView = LayoutInflater.from(context).inflate( |
| 51 | com.android.internal.R.layout.webview_find, null); |
| 52 | mEditText = (EditText) mCustomView.findViewById( |
| 53 | com.android.internal.R.id.edit); |
| 54 | // Override long click so that select ActionMode is not opened, which |
| 55 | // would exit find ActionMode. |
| 56 | mEditText.setOnLongClickListener(this); |
| 57 | setText(""); |
| 58 | mMatches = (TextView) mCustomView.findViewById( |
| 59 | com.android.internal.R.id.matches); |
| 60 | mInput = (InputMethodManager) |
| 61 | context.getSystemService(Context.INPUT_METHOD_SERVICE); |
| 62 | mResources = context.getResources(); |
| 63 | } |
| 64 | |
| 65 | void setTitleBar(View v) { mTitleBar = v; } |
| 66 | |
Leon Scroggins | 05919f2 | 2010-09-14 17:22:36 -0400 | [diff] [blame] | 67 | void finish() { |
| 68 | mActionMode.finish(); |
| 69 | } |
| 70 | |
Leon Scroggins | fe026bd | 2010-08-24 14:16:09 -0400 | [diff] [blame] | 71 | /* |
| 72 | * Place text in the text field so it can be searched for. Need to press |
| 73 | * the find next or find previous button to find all of the matches. |
| 74 | */ |
| 75 | void setText(String text) { |
| 76 | mEditText.setText(text); |
| 77 | Spannable span = (Spannable) mEditText.getText(); |
| 78 | int length = span.length(); |
| 79 | // Ideally, we would like to set the selection to the whole field, |
| 80 | // but this brings up the Text selection CAB, which dismisses this |
| 81 | // one. |
| 82 | Selection.setSelection(span, length, length); |
| 83 | // Necessary each time we set the text, so that this will watch |
| 84 | // changes to it. |
| 85 | span.setSpan(this, 0, length, Spannable.SPAN_INCLUSIVE_INCLUSIVE); |
| 86 | mMatchesFound = false; |
| 87 | } |
| 88 | |
| 89 | /* |
| 90 | * Set the WebView to search. Must be non null, and set before calling |
| 91 | * startActionMode. |
| 92 | */ |
| 93 | void setWebView(WebView webView) { |
| 94 | if (null == webView) { |
| 95 | throw new AssertionError("WebView supplied to " |
| 96 | + "FindActionModeCallback cannot be null"); |
| 97 | } |
| 98 | mWebView = webView; |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * Move the highlight to the next match. |
| 103 | * @param next If true, find the next match further down in the document. |
| 104 | * If false, find the previous match, up in the document. |
| 105 | */ |
| 106 | private void findNext(boolean next) { |
| 107 | if (mWebView == null) { |
| 108 | throw new AssertionError( |
| 109 | "No WebView for FindActionModeCallback::findNext"); |
| 110 | } |
| 111 | mWebView.findNext(next); |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Highlight all the instances of the string from mEditText in mWebView. |
| 116 | */ |
| 117 | void findAll() { |
| 118 | if (mWebView == null) { |
| 119 | throw new AssertionError( |
| 120 | "No WebView for FindActionModeCallback::findAll"); |
| 121 | } |
| 122 | CharSequence find = mEditText.getText(); |
| 123 | if (0 == find.length()) { |
| 124 | mWebView.clearMatches(); |
| 125 | mMatches.setVisibility(View.GONE); |
| 126 | mMatchesFound = false; |
| 127 | } else { |
| 128 | mMatchesFound = true; |
| 129 | mMatches.setVisibility(View.VISIBLE); |
| 130 | mNumberOfMatches = mWebView.findAll(find.toString()); |
| 131 | if (0 == mNumberOfMatches) { |
| 132 | mMatches.setText(mResources.getString( |
| 133 | com.android.internal.R.string.no_matches)); |
| 134 | } else { |
| 135 | updateMatchesString(); |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * Update the string which tells the user how many matches were found, and |
| 142 | * which match is currently highlighted. |
| 143 | */ |
| 144 | private void updateMatchesString() { |
| 145 | String template = mResources.getQuantityString( |
| 146 | com.android.internal.R.plurals.matches_found, mNumberOfMatches, |
| 147 | mWebView.findIndex() + 1, mNumberOfMatches); |
| 148 | |
| 149 | mMatches.setText(template); |
| 150 | } |
| 151 | |
| 152 | // OnLongClickListener implementation |
| 153 | |
| 154 | @Override |
| 155 | public boolean onLongClick(View v) { return true; } |
| 156 | |
| 157 | // ActionMode.Callback implementation |
| 158 | |
| 159 | @Override |
| 160 | public boolean onCreateActionMode(ActionMode mode, Menu menu) { |
| 161 | mode.setCustomView(mCustomView); |
| 162 | mode.getMenuInflater().inflate(com.android.internal.R.menu.webview_find, |
| 163 | menu); |
Leon Scroggins | 05919f2 | 2010-09-14 17:22:36 -0400 | [diff] [blame] | 164 | mActionMode = mode; |
Leon Scroggins | fe026bd | 2010-08-24 14:16:09 -0400 | [diff] [blame] | 165 | Editable edit = mEditText.getText(); |
| 166 | Selection.setSelection(edit, edit.length()); |
| 167 | mMatches.setVisibility(View.GONE); |
| 168 | mMatchesFound = false; |
| 169 | mMatches.setText("0"); |
| 170 | mEditText.requestFocus(); |
| 171 | mInput.showSoftInput(mEditText, 0); |
| 172 | return true; |
| 173 | } |
| 174 | |
| 175 | @Override |
| 176 | public void onDestroyActionMode(ActionMode mode) { |
| 177 | if (mTitleBar != null) mWebView.setEmbeddedTitleBar(mTitleBar); |
| 178 | mWebView.notifyFindDialogDismissed(); |
| 179 | mInput.hideSoftInputFromWindow(mWebView.getWindowToken(), 0); |
| 180 | } |
| 181 | |
| 182 | @Override |
| 183 | public boolean onPrepareActionMode(ActionMode mode, Menu menu) { |
| 184 | return false; |
| 185 | } |
| 186 | |
| 187 | @Override |
| 188 | public boolean onActionItemClicked(ActionMode mode, MenuItem item) { |
| 189 | if (!mMatchesFound) { |
| 190 | findAll(); |
| 191 | return true; |
| 192 | } |
| 193 | switch(item.getItemId()) { |
| 194 | case com.android.internal.R.id.find_prev: |
| 195 | findNext(false); |
| 196 | break; |
| 197 | case com.android.internal.R.id.find_next: |
| 198 | findNext(true); |
| 199 | break; |
| 200 | default: |
| 201 | return false; |
| 202 | } |
| 203 | updateMatchesString(); |
| 204 | return true; |
| 205 | } |
| 206 | |
| 207 | // TextWatcher implementation |
| 208 | |
| 209 | @Override |
| 210 | public void beforeTextChanged(CharSequence s, |
| 211 | int start, |
| 212 | int count, |
| 213 | int after) { |
| 214 | // Does nothing. Needed to implement TextWatcher. |
| 215 | } |
| 216 | |
| 217 | @Override |
| 218 | public void onTextChanged(CharSequence s, |
| 219 | int start, |
| 220 | int before, |
| 221 | int count) { |
| 222 | findAll(); |
| 223 | } |
| 224 | |
| 225 | @Override |
| 226 | public void afterTextChanged(Editable s) { |
| 227 | // Does nothing. Needed to implement TextWatcher. |
| 228 | } |
| 229 | |
| 230 | } |