/**
* Return a {@link Form} instance allowing a user to
* add links in the TinyMCE content editor.
*
* @return Form
*/
public function LinkForm()
{
$siteTree = TreeDropdownField::create('internal', _t('HTMLEditorField.PAGE', "Page"), 'SilverStripe\\CMS\\Model\\SiteTree', 'ID', 'MenuTitle', true);
// mimic the SiteTree::getMenuTitle(), which is bypassed when the search is performed
$siteTree->setSearchFunction(array($this, 'siteTreeSearchCallback'));
$numericLabelTmpl = '<span class="step-label"><span class="flyout">Step %d.</span>' . '<span class="title">%s</span></span>';
$form = new Form($this->controller, "{$this->name}/LinkForm", new FieldList($headerWrap = new CompositeField(new LiteralField('Heading', sprintf('<h3 class="htmleditorfield-mediaform-heading insert">%s</h3>', _t('HTMLEditorField.LINK', 'Insert Link')))), $contentComposite = new CompositeField(OptionsetField::create('LinkType', DBField::create_field('HTMLFragment', sprintf($numericLabelTmpl, '1', _t('HTMLEditorField.LINKTO', 'Link type'))), array('internal' => _t('HTMLEditorField.LINKINTERNAL', 'Link to a page on this site'), 'external' => _t('HTMLEditorField.LINKEXTERNAL', 'Link to another website'), 'anchor' => _t('HTMLEditorField.LINKANCHOR', 'Link to an anchor on this page'), 'email' => _t('HTMLEditorField.LINKEMAIL', 'Link to an email address'), 'file' => _t('HTMLEditorField.LINKFILE', 'Link to download a file')), 'internal'), LiteralField::create('Step2', '<div class="step2">' . sprintf($numericLabelTmpl, '2', _t('HTMLEditorField.LINKDETAILS', 'Link details')) . '</div>'), $siteTree, TextField::create('external', _t('HTMLEditorField.URL', 'URL'), 'http://'), EmailField::create('email', _t('HTMLEditorField.EMAIL', 'Email address')), $fileField = UploadField::create('file', _t('HTMLEditorField.FILE', 'SilverStripe\\Assets\\File')), TextField::create('Anchor', _t('HTMLEditorField.ANCHORVALUE', 'Anchor')), TextField::create('Subject', _t('HTMLEditorField.SUBJECT', 'Email subject')), TextField::create('Description', _t('HTMLEditorField.LINKDESCR', 'Link description')), CheckboxField::create('TargetBlank', _t('HTMLEditorField.LINKOPENNEWWIN', 'Open link in a new window?')), HiddenField::create('Locale', null, $this->controller->Locale))), new FieldList());
$headerWrap->setName('HeaderWrap');
$headerWrap->addExtraClass('CompositeField composite cms-content-header form-group--no-label ');
$contentComposite->setName('ContentBody');
$contentComposite->addExtraClass('ss-insert-link content');
$fileField->setAllowedMaxFileNumber(1);
$form->unsetValidator();
$form->loadDataFrom($this);
$form->addExtraClass('htmleditorfield-form htmleditorfield-linkform cms-mediaform-content');
$this->extend('updateLinkForm', $form);
return $form;
}