Webview attributes overhaul.

extensions/renderer/resources/guest_view/web_view_attributes.js

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This module implements the attributes of the <webview> tag.
+
+var WebView = require('webView').WebView;
+var WebViewConstants = require('webViewConstants').WebViewConstants;
+
+// -----------------------------------------------------------------------------
+// Attribute objects.
+
+// Default implementation of a WebView attribute.
+function WebViewAttribute(name, webViewImpl) {
+  this.name = name;
+  this.value = '';
+  this.webViewImpl = webViewImpl;
+}
+
+WebViewAttribute.prototype.getValue = function() {
+  return this.value || '';
+};
+
+WebViewAttribute.prototype.setValue = function(value) {
+  this.value = value;
+};
+
+// Attribute representing the state of the storage partition.
+function Partition(webViewImpl) {
+  this.validPartitionId = true;
+  this.persistStorage = false;
+  this.storagePartitionId = '';
+  this.webViewImpl = webViewImpl;
+}
+
+Partition.prototype = new WebViewAttribute(
+    WebViewConstants.ATTRIBUTE_PARTITION);
+
+Partition.prototype.getValue = function() {
+  if (!this.validPartitionId) {
+    return '';
+  }
+  return (this.persistStorage ? 'persist:' : '') + this.storagePartitionId;
+};
+
+Partition.prototype.setValue = function(value) {
+  var result = {};
+  var hasNavigated = !this.webViewImpl.beforeFirstNavigation;
+  if (hasNavigated) {
+    result.error = WebViewConstants.ERROR_MSG_ALREADY_NAVIGATED;
+    return result;
+  }
+  if (!value) {
+    value = '';
+  }
+
+  var LEN = 'persist:'.length;
+  if (value.substr(0, LEN) == 'persist:') {
+    value = value.substr(LEN);
+    if (!value) {
+      this.validPartitionId = false;
+      result.error = WebViewConstants.ERROR_MSG_INVALID_PARTITION_ATTRIBUTE;
+      return result;
+    }
+    this.persistStorage = true;
+  } else {
+    this.persistStorage = false;
+  }
+
+  this.storagePartitionId = value;
+  return result;
+};
+
+// -----------------------------------------------------------------------------
+
+// Sets up all of the webview attributes.
+WebView.prototype.setupWebViewAttributes = function() {
+  this.attributes = {};
+
+  // Initialize the attributes with special behavior (and custom attribute
+  // objects).
+  this.attributes[WebViewConstants.ATTRIBUTE_PARTITION] = new Partition(this);
+
+  // Initialize the remaining attributes, which have default behavior.
+  var defaultAttributes = [WebViewConstants.ATTRIBUTE_ALLOWTRANSPARENCY,
+                           WebViewConstants.ATTRIBUTE_AUTOSIZE,
+                           WebViewConstants.ATTRIBUTE_MAXHEIGHT,
+                           WebViewConstants.ATTRIBUTE_MAXWIDTH,
+                           WebViewConstants.ATTRIBUTE_MINHEIGHT,
+                           WebViewConstants.ATTRIBUTE_MINWIDTH,
+                           WebViewConstants.ATTRIBUTE_NAME,
+                           WebViewConstants.ATTRIBUTE_SRC];
+  for (var i = 0; defaultAttributes[i]; ++i) {
+    this.attributes[defaultAttributes[i]] =
+        new WebViewAttribute(defaultAttributes[i], this);
+  }
+};