/// <summary>
/// Return a sorted list of variable names for variable dropdown menus.
/// Include a special option at the end for creating a new variable name.
/// </summary>
/// <returns>Array of variable names.</returns>
public JsArray <DropdownItemInfo> dropdownCreate()
{
JsArray <string> variableList;
if (this.sourceBlock_ != null && this.sourceBlock_.workspace != null)
{
// Get a copy of the list, so that adding rename and new variable options
// doesn't modify the workspace's list.
variableList = this.sourceBlock_.workspace.variableList.Slice(0);
}
else
{
variableList = new JsArray <string>();
}
// Ensure that the currently selected variable is an option.
var name = this.getText();
if (name != null && variableList.IndexOf(name) == -1)
{
variableList.Push(name);
}
Array.Sort(variableList, CaseInsensitiveCompare.caseInsensitiveCompare);
variableList.Push(Msg.RENAME_VARIABLE);
variableList.Push(Msg.DELETE_VARIABLE.Replace("%1", name));
// Variables are not language-specific, use the name as both the user-facing
// text and the internal representation.
var options = new JsArray <DropdownItemInfo>(variableList.Length);
for (var i = 0; i < variableList.Length; i++)
{
options[i] = new DropdownItemInfo(variableList[i], variableList[i]);
}
return(options);
}
/// <summary>
/// Factor out common words in statically defined options.
/// Create prefix and/or suffix labels.
/// </summary>
private void trimOptions_()
{
this.prefixField = null;
this.suffixField = null;
var options = this.menuGenerator_.As <JsArray <DropdownItemInfo> >();
if (options == null || options.Length < 2)
{
return;
}
var strings = options.Map((t) => { return(t.text); });
var shortest = Core.shortestStringLength(strings);
var prefixLength = Core.commonWordPrefix(strings, shortest);
var suffixLength = Core.commonWordSuffix(strings, shortest);
if (prefixLength == 0 && suffixLength == 0)
{
return;
}
if (shortest <= prefixLength + suffixLength)
{
// One or more strings will entirely vanish if we proceed. Abort.
return;
}
if (prefixLength != 0)
{
this.prefixField = strings[0].Substring(0, prefixLength - 1);
}
if (suffixLength != 0)
{
this.suffixField = strings[0].Substr(1 - suffixLength);
}
// Remove the prefix and suffix from the options.
var newOptions = new JsArray <DropdownItemInfo>(options.Length);
for (var i = 0; i < options.Length; i++)
{
var text = options[i].text;
var value = options[i].value;
text = text.Substring(prefixLength, text.Length - suffixLength);
newOptions[i] = new DropdownItemInfo(text, value);
}
this.menuGenerator_ = newOptions;
}
