/libs/Nette/Forms/Renderers/InstantClientScript.php

<?php



/**

 * This file is part of the Nette Framework.

 *

 * Copyright (c) 2004, 2010 David Grudl (http://davidgrudl.com)

 *

 * This source file is subject to the "Nette license", and/or

 * GPL license. For more information please see http://nette.org

 */



namespace Nette\Forms;



use Nette;







/**

 * Instant validation JavaScript generator.

 *

 * @author     David Grudl

 */

final class InstantClientScript extends Nette\Object

{

	/** @var array */

	private $validateScripts;



	/** @var string */

	private $toggleScript;



	/** @var bool */

	private $central;



	/** @var Form */

	private $form;







	public function __construct(Form $form)

	{

		$this->form = $form;

	}







	public function enable()

	{

		$this->validateScripts = array();

		$this->toggleScript = '';

		$this->central = TRUE;



		foreach ($this->form->getControls() as $control) {

			$script = $this->getValidateScript($control->getRules());

			if ($script) {

				$this->validateScripts[$control->getHtmlName()] = $script;

			}

			$this->toggleScript .= $this->getToggleScript($control->getRules());



			if ($control instanceof ISubmitterControl && $control->getValidationScope() !== TRUE) {

				$this->central = FALSE;

			}

		}



		if ($this->validateScripts || $this->toggleScript) {

			if ($this->central) {

				$this->form->getElementPrototype()->onsubmit("return nette.validateForm(this)", TRUE);



			} else {

				foreach ($this->form->getComponents(TRUE, 'Nette\Forms\ISubmitterControl') as $control) {

					if ($control->getValidationScope()) {

						$control->getControlPrototype()->onclick("return nette.validateForm(this)", TRUE);

					}

				}

			}

		}

	}







	/**

	 * Generates the client side validation script.

	 * @return string

	 */

	public function renderClientScript()

	{

		if (!$this->validateScripts && !$this->toggleScript) {

			return;

		}



		$formName = json_encode((string) $this->form->getElementPrototype()->id);

		ob_start();

		require __DIR__ . '/InstantClientScript.phtml';

		return ob_get_clean();

	}







	private function getValidateScript(Rules $rules)

	{

		$res = '';

		foreach ($rules as $rule) {

			if (!is_string($rule->operation)) continue;



			if (strcasecmp($rule->operation, 'Nette\\Forms\\InstantClientScript::javascript') === 0) {

				$res .= "$rule->arg\n";

				continue;

			}



			$script = $this->getClientScript($rule->control, $rule->operation, $rule->arg);

			if (!$script) continue;



			if ($rule->type === Rule::VALIDATOR && !empty($rule->message)) {

				$message = Rules::formatMessage($rule, FALSE);

				$res .= "$script\n"

					. "if (" . ($rule->isNegative ? '' : '!') . "res) "

					. "return " . json_encode((string) $message) . (strpos($message, '%value') === FALSE ? '' : ".replace('%value', val);\n") . ";\n";



			} elseif ($rule->type === Rule::CONDITION) {

				$innerScript = $this->getValidateScript($rule->subRules);

				if ($innerScript) {

					$res .= "$script\nif (" . ($rule->isNegative ? '!' : '') . "res) {\n" . Nette\String::indent($innerScript) . "}\n";

					if ($rule->control instanceof ISubmitterControl) {

						$this->central = FALSE;

					}

				}

			}

		}

		return $res;

	}







	private function getToggleScript(Rules $rules, $cond = NULL)

	{

		$s = '';

		foreach ($rules->getToggles() as $id => $visible) {

			$s .= "visible = true; {$cond}\n"

				. "nette.toggle(" . json_encode((string) $id) . ", " . ($visible ? '' : '!') . "visible);\n";

		}

		$formName = json_encode((string) $this->form->getElementPrototype()->id);

		foreach ($rules as $rule) {

			if ($rule->type === Rule::CONDITION && is_string($rule->operation)) {

				$script = $this->getClientScript($rule->control, $rule->operation, $rule->arg);

				if ($script) {

					$res = $this->getToggleScript($rule->subRules, $cond . "$script visible = visible && " . ($rule->isNegative ? '!' : '') . "res;\n");

					if ($res) {

						$el = $rule->control->getControlPrototype();

						if ($el->getName() === 'select') {

							$el->onchange("nette.forms[$formName].toggle(this)", TRUE);

						} else {

							$el->onclick("nette.forms[$formName].toggle(this)", TRUE);

							//$el->onkeyup("nette.forms[$formName].toggle(this)", TRUE);

						}

						$s .= $res;

					}

				}

			}

		}

		return $s;

	}







	private function getClientScript(IFormControl $control, $operation, $arg)

	{

		$operation = strtolower($operation);

		$elem = 'form[' . json_encode($control->getHtmlName()) . ']';



		switch (TRUE) {

		case $control instanceof HiddenField || $control->isDisabled():

			return NULL;



		case $operation === ':filled' && $control instanceof RadioList:

			return "res = (val = nette.getValue($elem)) !== null;";



		case $operation === ':submitted' && $control instanceof SubmitButton:

			return "res = sender && sender.name==" . json_encode($control->getHtmlName()) . ";";



		case $operation === ':equal' && $control instanceof MultiSelectBox:

			$tmp = array();

			foreach ((is_array($arg) ? $arg : array($arg)) as $item) {

				$tmp[] = "options[i].value==" . json_encode((string) $item);

			}

			$first = $control->isFirstSkipped() ? 1 : 0;

			return "var options = $elem.options; res = false;\n"

				. "for (var i=$first, len=options.length; i<len; i++)\n\t"

				. "if (options[i].selected && (" . implode(' || ', $tmp) . ")) { res = true; break; }";



		case $operation === ':filled' && $control instanceof SelectBox:

			return "res = $elem.selectedIndex >= " . ($control->isFirstSkipped() ? 1 : 0) . ";";



		case $operation === ':filled' && $control instanceof TextBase:

			return "val = nette.getValue($elem); res = val!='' && val!=" . json_encode((string) $control->getEmptyValue()) . ";";



		case $operation === ':minlength' && $control instanceof TextBase:

			return "res = (val = nette.getValue($elem)).length>=" . (int) $arg . ";";



		case $operation === ':maxlength' && $control instanceof TextBase:

			return "res = (val = nette.getValue($elem)).length<=" . (int) $arg . ";";



		case $operation === ':length' && $control instanceof TextBase:

			if (!is_array($arg)) {

				$arg = array($arg, $arg);

			}

			return "val = nette.getValue($elem); res = " . ($arg[0] === NULL ? "true" : "val.length>=" . (int) $arg[0]) . " && "

				. ($arg[1] === NULL ? "true" : "val.length<=" . (int) $arg[1]) . ";";



		case $operation === ':email' && $control instanceof TextBase:

			return 'res = /^[^@\s]+@[^@\s]+\.[a-z]{2,10}$/i.test(val = nette.getValue('.$elem.'));';



		case $operation === ':url' && $control instanceof TextBase:

			return 'res = /^.+\.[a-z]{2,6}(\\/.*)?$/i.test(val = nette.getValue('.$elem.'));';



		case $operation === ':regexp' && $control instanceof TextBase:

			if (!preg_match('#^(/.*/)([imu]*)$#', $arg, $matches)) {

				return NULL; // regular expression must be JavaScript compatible

			}

			$arg = $matches[1] . str_replace('u', '', $matches[2]);

			return "res = $arg.test(val = nette.getValue($elem));";



		case $operation === ':integer' && $control instanceof TextBase:

			return "res = /^-?[0-9]+$/.test(val = nette.getValue($elem));";



		case $operation === ':float' && $control instanceof TextBase:

			return "res = /^-?[0-9]*[.,]?[0-9]+$/.test(val = nette.getValue($elem));";



		case $operation === ':range' && $control instanceof TextBase:

			return "val = nette.getValue($elem); res = " . ($arg[0] === NULL ? "true" : "parseFloat(val)>=" . json_encode((float) $arg[0])) . " && "

				. ($arg[1] === NULL ? "true" : "parseFloat(val)<=" . json_encode((float) $arg[1])) . ";";



		case $operation === ':filled' && $control instanceof FormControl:

			return "res = (val = nette.getValue($elem)) != '';";



		case $operation === ':valid' && $control instanceof FormControl:

			return "res = !this[" . json_encode($control->getHtmlName()) . "](sender);";



		case $operation === ':equal' && $control instanceof FormControl:

			if ($control instanceof Checkbox) $arg = (bool) $arg;

			$tmp = array();

			foreach ((is_array($arg) ? $arg : array($arg)) as $item) {

				if ($item instanceof IFormControl) { // compare with another form control?

					$tmp[] = "val==nette.getValue(form[" . json_encode($item->getHtmlName()) . "])";

				} else {

					$tmp[] = "val==" . json_encode($item);

				}

			}

			return "val = nette.getValue($elem); res = (" . implode(' || ', $tmp) . ");";

		}

	}







	public static function javascript()

	{

		return TRUE;

	}



}