/// <summary>
/// Handle OnAfterValidate event of the UI form.
/// </summary>
/// <param name="sender">Sender object</param>
/// <param name="e">Event argument</param>
protected void EditForm_OnAfterValidate(object sender, EventArgs e)
{
// Validate the dynamic code
if (!languageChangeProceeded && !EditForm.IsInsertMode)
{
// Save button doesn't change style sheet language, reset field value to the data base value
EditForm.FieldControls["StylesheetDynamicLanguage"].Value = EditForm.GetDataValue("StylesheetDynamicLanguage");
string lang = ValidationHelper.GetString(EditForm.GetDataValue("StylesheetDynamicLanguage"), CssStylesheetInfo.PLAIN_CSS);
if (!lang.EqualsCSafe(CssStylesheetInfo.PLAIN_CSS))
{
string output = String.Empty;
string dynamicCode = EditForm.GetFieldValue("StylesheetDynamicCode") as string;
string error = CSSStylesheetNewControlExtender.ProcessCss(dynamicCode, lang, out output, hidCompiledCss);
if (!String.IsNullOrEmpty(error))
{
EditForm.AddError(error);
EditForm.StopProcessing = true;
}
// Keep the current value for better performance
else
{
CssPreprocessor.CurrentCompiledValue = output;
}
}
}
RegisterHideProgress();
}
/// <summary>
/// Detects stylesheet language change and converts CSS code according to the former and the latter language.
/// </summary>
/// <param name="originalLanguage">The previous language</param>
/// <param name="newLanguage">The new language</param>
private void ChangeStylesheetLanguage(string originalLanguage, string newLanguage)
{
// Check whether the stylesheet language has actually changed.
if (!String.IsNullOrEmpty(newLanguage) && !String.IsNullOrEmpty(originalLanguage) && !originalLanguage.EqualsCSafe(newLanguage, true))
{
string code = String.Empty;
string output = String.Empty;
string errorMessage = String.Empty;
if (newLanguage.EqualsCSafe(CssStylesheetInfo.PLAIN_CSS, true))
{
// Changed from any CSS preprocessor language to plain CSS.
code = ValidationHelper.GetString(EditForm.GetFieldValue("StylesheetDynamicCode"), String.Empty);
// Try to parse the code against the original preprocessor language.
errorMessage = CSSStylesheetNewControlExtender.ProcessCss(code, originalLanguage, out output, hidCompiledCss);
}
else if (originalLanguage.EqualsCSafe(CssStylesheetInfo.PLAIN_CSS, true))
{
// Changed from Plain CSS to some CSS preprocessor language.
code = ValidationHelper.GetString(EditForm.GetFieldValue("StylesheetText"), String.Empty);
// Try to parse the code against the new preprocessor language.
errorMessage = CSSStylesheetNewControlExtender.ProcessCss(code, newLanguage, out output, hidCompiledCss);
}
else
{
// Changed from CSS preprocessor language to another one.
code = ValidationHelper.GetString(EditForm.GetFieldValue("StylesheetDynamicCode"), String.Empty);
// Try to parse the code against the original preprocessor language.
errorMessage = CSSStylesheetNewControlExtender.ProcessCss(code, originalLanguage, out output, hidCompiledCss);
}
if (String.IsNullOrEmpty(errorMessage))
{
// Success -> Set correct values to form controls.
if (newLanguage.EqualsCSafe(CssStylesheetInfo.PLAIN_CSS, true))
{
// output -> StylesheetText
EditForm.FieldControls["StylesheetText"].Value = output;
}
else if (originalLanguage.EqualsCSafe(CssStylesheetInfo.PLAIN_CSS, true))
{
// Copy the original code to StylesheetDynamicCode field.
EditForm.FieldControls["StylesheetDynamicCode"].Value = code;
}
else
{
// Copy the original code to StylesheetDynamicCode field.
EditForm.FieldControls["StylesheetDynamicCode"].Value = output;
}
// Prevent to additional change processing.
languageChangeProceeded = true;
}
else
{
// Failure -> Show error message
EditForm.AddError(errorMessage);
// Prevent further processing
EditForm.StopProcessing = true;
// Set drop-down list to its former value
FormEngineUserControl langControl = EditForm.FieldControls["StylesheetDynamicLanguage"];
if (langControl != null)
{
langControl.Value = originalLanguage;
CssStylesheetInfo cssInfo = EditForm.EditedObject as CssStylesheetInfo;
if (cssInfo != null)
{
cssInfo.StylesheetDynamicLanguage = originalLanguage;
}
}
}
}
}
