/// <summary>
/// Bind the localStorage backup function to the unload event.
/// </summary>
/// <param name="opt_workspace">Workspace.</param>
public static void backupOnUnload(WorkspaceSvg opt_workspace = null)
{
var workspace = opt_workspace ?? Blockly.Core.getMainWorkspace();
Window.AddEventListener("unload",
new Action(() => { BlocklyStorage.backupBlocks_(workspace); }), false);
}
/// <summary>
/// Callback function for AJAX call.
/// </summary>
private static void handleRequest_()
{
if (BlocklyStorage.httpRequest_.ReadyState == 4)
{
if (BlocklyStorage.httpRequest_.Status != 200)
{
BlocklyStorage.alert(BlocklyStorage.HTTPREQUEST_ERROR + "\n" +
"httpRequest_.status: " + BlocklyStorage.httpRequest_.Status);
}
else
{
var data = BlocklyStorage.httpRequest_.ResponseText.Trim();
if (BlocklyStorage.httpRequest_.Name == "xml")
{
Window.Location.Hash = data;
BlocklyStorage.alert(BlocklyStorage.LINK_ALERT.Replace("%1",
Window.Location.Href));
}
else if (BlocklyStorage.httpRequest_.Name == "key")
{
if (data.Length == 0)
{
BlocklyStorage.alert(BlocklyStorage.HASH_ERROR.Replace("%1",
Window.Location.Hash));
}
else
{
BlocklyStorage.loadXml_(data, (WorkspaceSvg)BlocklyStorage.httpRequest_["workspace"]);
}
}
BlocklyStorage.monitorChanges_((WorkspaceSvg)BlocklyStorage.httpRequest_["workspace"]);
}
BlocklyStorage.httpRequest_ = null;
}
}
/// <summary>
/// Save blocks to database and return a link containing key to XML.
/// </summary>
/// <param name="opt_workspace">Workspace.</param>
public static void link(WorkspaceSvg opt_workspace = null)
{
var workspace = opt_workspace ?? Blockly.Core.getMainWorkspace();
var xml = Blockly.Xml.workspaceToDom(workspace);
var data = Blockly.Xml.domToText(xml);
BlocklyStorage.makeRequest_("/storage", "xml", data, workspace);
}
/// <summary>
/// Load blocks from XML.
/// </summary>
/// <param name="xml">Text representation of XML.</param>
/// <param name="workspace">Workspace.</param>
private static void loadXml_(string xmlStr, WorkspaceSvg workspace)
{
Element xml;
try {
xml = Blockly.Xml.textToDom(xmlStr);
}
catch (Exception) {
BlocklyStorage.alert(BlocklyStorage.XML_ERROR + "\nXML: " + xmlStr);
return;
}
// Clear the workspace to avoid merge.
workspace.clear();
Blockly.Xml.domToWorkspace(xml, workspace);
}
/// <summary>
/// Retrieve XML text from database using given key.
/// </summary>
/// <param name="key">Key to XML, obtained from href.</param>
/// <param name="opt_workspace">Workspace.</param>
public static void retrieveXml(string key, WorkspaceSvg opt_workspace = null)
{
var workspace = opt_workspace ?? Blockly.Core.getMainWorkspace();
BlocklyStorage.makeRequest_("/storage", "key", key, workspace);
}
