1 files changed, 185 insertions, 0 deletions
diff --git a/core/java/android/webkit/JsDialogHelper.java b/core/java/android/webkit/JsDialogHelper.java
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+++ b/core/java/android/webkit/JsDialogHelper.java
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+/*
+ * Copyright (C) 2013 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 android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Message;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.TextView;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+/**
+ * Helper class to create JavaScript dialogs. It is used by
+ * different WebView implementations.
+ *
+ * @hide Helper class for internal use
+ */
+public class JsDialogHelper {
+
+    private static final String TAG = "JsDialogHelper";
+
+    // Dialog types
+    public static final int ALERT   = 1;
+    public static final int CONFIRM = 2;
+    public static final int PROMPT  = 3;
+    public static final int UNLOAD  = 4;
+
+    private final String mDefaultValue;
+    private final JsPromptResult mResult;
+    private final String mMessage;
+    private final int mType;
+    private final String mUrl;
+
+    public JsDialogHelper(JsPromptResult result, int type, String defaultValue, String message,
+            String url) {
+        mResult = result;
+        mDefaultValue = defaultValue;
+        mMessage = message;
+        mType = type;
+        mUrl = url;
+    }
+
+    public JsDialogHelper(JsPromptResult result, Message msg) {
+        mResult = result;
+        mDefaultValue = msg.getData().getString("default");
+        mMessage = msg.getData().getString("message");
+        mType = msg.getData().getInt("type");
+        mUrl = msg.getData().getString("url");
+    }
+
+    public boolean invokeCallback(WebChromeClient client, WebView webView) {
+        switch (mType) {
+            case ALERT:
+                return client.onJsAlert(webView, mUrl, mMessage, mResult);
+            case CONFIRM:
+                return client.onJsConfirm(webView, mUrl, mMessage, mResult);
+            case UNLOAD:
+                return client.onJsBeforeUnload(webView, mUrl, mMessage, mResult);
+            case PROMPT:
+                return client.onJsPrompt(webView, mUrl, mMessage, mDefaultValue, mResult);
+            default:
+                throw new IllegalArgumentException("Unexpected type: " + mType);
+        }
+    }
+
+    public void showDialog(Context context) {
+        if (!canShowAlertDialog(context)) {
+            Log.w(TAG, "Cannot create a dialog, the WebView context is not an Activity");
+            mResult.cancel();
+            return;
+        }
+
+        String title, displayMessage;
+        int positiveTextId, negativeTextId;
+        if (mType == UNLOAD) {
+            title = context.getString(com.android.internal.R.string.js_dialog_before_unload_title);
+            displayMessage = context.getString(
+                    com.android.internal.R.string.js_dialog_before_unload, mMessage);
+            positiveTextId = com.android.internal.R.string.js_dialog_before_unload_positive_button;
+            negativeTextId = com.android.internal.R.string.js_dialog_before_unload_negative_button;
+        } else {
+            title = getJsDialogTitle(context);
+            displayMessage = mMessage;
+            positiveTextId = com.android.internal.R.string.ok;
+            negativeTextId = com.android.internal.R.string.cancel;
+        }
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setTitle(title);
+        builder.setOnCancelListener(new CancelListener());
+        if (mType != PROMPT) {
+            builder.setMessage(displayMessage);
+            builder.setPositiveButton(positiveTextId, new PositiveListener(null));
+        } else {
+            final View view = LayoutInflater.from(context).inflate(
+                    com.android.internal.R.layout.js_prompt, null);
+            EditText edit = ((EditText) view.findViewById(com.android.internal.R.id.value));
+            edit.setText(mDefaultValue);
+            builder.setPositiveButton(positiveTextId, new PositiveListener(edit));
+            ((TextView) view.findViewById(com.android.internal.R.id.message)).setText(mMessage);
+            builder.setView(view);
+        }
+        if (mType != ALERT) {
+            builder.setNegativeButton(negativeTextId, new CancelListener());
+        }
+        builder.show();
+    }
+
+    private class CancelListener implements DialogInterface.OnCancelListener,
+            DialogInterface.OnClickListener {
+        @Override
+        public void onCancel(DialogInterface dialog) {
+            mResult.cancel();
+        }
+        @Override
+        public void onClick(DialogInterface dialog, int which) {
+            mResult.cancel();
+        }
+    }
+
+    private class PositiveListener implements DialogInterface.OnClickListener {
+        private final EditText mEdit;
+
+        public PositiveListener(EditText edit) {
+            mEdit = edit;
+        }
+
+        @Override
+        public void onClick(DialogInterface dialog, int which) {
+            if (mEdit == null) {
+                mResult.confirm();
+            } else {
+                mResult.confirm(mEdit.getText().toString());
+            }
+        }
+    }
+
+    private String getJsDialogTitle(Context context) {
+        String title = mUrl;
+        if (URLUtil.isDataUrl(mUrl)) {
+            // For data: urls, we just display 'JavaScript' similar to Chrome.
+            title = context.getString(com.android.internal.R.string.js_dialog_title_default);
+        } else {
+            try {
+                URL alertUrl = new URL(mUrl);
+                // For example: "The page at 'http://www.mit.edu' says:"
+                title = context.getString(com.android.internal.R.string.js_dialog_title,
+                        alertUrl.getProtocol() + "://" + alertUrl.getHost());
+            } catch (MalformedURLException ex) {
+                // do nothing. just use the url as the title
+            }
+        }
+        return title;
+    }
+
+    private static boolean canShowAlertDialog(Context context) {
+        // We can only display the alert dialog if mContext is
+        // an Activity context.
+        // FIXME: Should we display dialogs if mContext does
+        // not have the window focus (e.g. if the user is viewing
+        // another Activity when the alert should be displayed) ?
+        // See bug 3166409
+        return context instanceof Activity;
+    }
+}