Webview attributes overhaul

Imported from:
884a5b43cb

atom/renderer/lib/web-view/web-view-attributes.coffee

@@ -0,0 +1,71 @@
+WebView = require './web-view'
+webViewConstants = require './web-view-constants'
+
+# Attribute objects.
+# Default implementation of a WebView attribute.
+class WebViewAttribute
+  constructor: (name, webViewImpl) ->
+    @name = name
+    @value = ''
+    @webViewImpl = webViewImpl
+
+  getValue: -> @value || ''
+
+  setValue: (value) -> @value = value
+
+# Attribute representing the state of the storage partition.
+class Partition extends WebViewAttribute
+  constructor: (webViewImpl) ->
+    super webViewConstants.ATTRIBUTE_PARTITION, webViewImpl
+
+    @validPartitionId = true
+    @persistStorage = false
+    @storagePartitionId = ''
+    @webViewImpl = webViewImpl
+
+  getValue: ->
+    return '' unless @validPartitionId
+    (if @persistStorage then 'persist:' else '') + @storagePartitionId
+
+  setValue: (value) ->
+    result = {}
+    hasNavigated = !@webViewImpl.beforeFirstNavigation
+    if hasNavigated
+      result.error = webViewConstants.ERROR_MSG_ALREADY_NAVIGATED
+      return result
+    value = '' unless value
+    LEN = 'persist:'.length
+    if value.substr(0, LEN) == 'persist:'
+      value = value.substr LEN
+      unless value
+        @validPartitionId = false
+        result.error = webViewConstants.ERROR_MSG_INVALID_PARTITION_ATTRIBUTE
+        return result
+      @persistStorage = true
+    else
+      @persistStorage = false
+    @storagePartitionId = value
+    result
+
+# Sets up all of the webview attributes.
+WebView::setupWebViewAttributes = ->
+  @attributes = {}
+
+  # Initialize the attributes with special behavior (and custom attribute
+  # objects).
+  @attributes[webViewConstants.ATTRIBUTE_PARTITION] = new Partition(this)
+
+  # Initialize the remaining attributes, which have default behavior.
+  defaultAttributes = [
+    webViewConstants.ATTRIBUTE_ALLOWTRANSPARENCY
+    webViewConstants.ATTRIBUTE_AUTOSIZE
+    webViewConstants.ATTRIBUTE_MAXHEIGHT
+    webViewConstants.ATTRIBUTE_MAXWIDTH
+    webViewConstants.ATTRIBUTE_MINHEIGHT
+    webViewConstants.ATTRIBUTE_MINWIDTH
+    webViewConstants.ATTRIBUTE_SRC
+    webViewConstants.ATTRIBUTE_HTTPREFERRER
+  ]
+
+  for attribute in defaultAttributes
+    @attributes[attribute] = new WebViewAttribute(attribute, this)