Silverstripe Droppable Textarea

Provides a field that allows for clicking and dragging of shortcodes into a related field. Useful for inserting shortcodes into a textarea without having to type them out.

NOTE: This only allows the insertion of shortcodes, it does not provide any functionality for parsing the shortcodes themselves.

Installation (with composer)

composer require iliain/silverstripe-droppable

Requirements

• PHP 7.4+ or 8.0+
• Silverstripe 4+ or 5+

Usage

The following is an example of creating a textarea and droppable field, assigning buttons to the different rows, and pushing a button to an existing row. Each option/button will be an array, with the first element being the shortcode to insert, and the second being the text to display on the button.

use Iliain\Droppable\Fields\DroppableField;

$blockContent = TextareaField::create('BlockContent', 'Block Content');

$droppable = DroppableField::create('Example', 'Example', 'BlockContent')
    ->setButtonRow(0, [
        ['[OPTION_1]', 'Option 1'],
        ['[OPTION_2]', 'Option 2'],
    ])
    ->setButtonRow(1, [
        ['[OPTION_3]', 'Option 3']
    ])
    ->pushButton(1, ['[OPTION_4]', 'Option 4']);

You can also use the method ->setUseDropdown(true) to use a dropdown instead of buttons. This will use the same data as the buttons, but will be displayed in a dropdown instead. This is useful when dealing with large amounts of buttons.

From here, the user can either:

• Click on a button to insert the shortcode into the start of the textarea, or the current position if the field is currently selected
• Drag a button into the textarea to insert the shortcode at the cursor position

Additionally, the field can be swapped to 'wrap' mode, which will wrap a defined set of code around the users current selection. It will look for $1 and $2 in the supplied string, and replace them with the selected text and the button value respectively.

$droppable->setWrapSelection(true);
$droppable->setWrapElement('<div class="$2">$1</div>');

The above would result in the following when clicking the first button while selecting "Selected Text" in the following sentence:

This is the Selected Text

This is the <div class="[OPTION_1]">Selected Text</div>

Functions

Has the usual functions available to a TextareaField, plus:

• setButtonRow(int $row, ArrayList $buttons) - Sets the buttons for a particular row. The buttons are an array of arrays. Will overwrite any existing buttons in that row.

• getButtonRow(int $row) - Gets the buttons for a particular row. Useful for modifying an existing row without just appending to the end.

• pushButton(int $row, array $button) - Pushes a button to the end of a particular row. Will append to an existing row, or create a new row if it doesn't exist.

• setUseDropdown(bool $useDropdown) - Sets whether to use a dropdown instead of rows of buttons. Defaults to false. The dropdown will use the row order as the order of the dropdown items.

• setWrapSelection(bool $wrap) - Sets whether to wrap the selection with the button value. Defaults to false.

• setWrapElement(string $wrap) - Sets the string to use for wrapping. Defaults to <span class="$2">$1</span>. The $1 will be replaced with the selected text, and the $2 will be replaced with the button value.

TODO

• Minify the JS and CSS
• Allow setting of default dropdown text