protected function expression(Expression $expr)
{
if ($expr instanceof Expressions\Binary) {
$this->codeEmitter->raw('(');
$this->expression($expr->getLeft());
$this->codeEmitter->raw(' ' . $expr->getOperation() . ' ');
$this->expression($expr->getRight());
$this->codeEmitter->raw(')');
} else {
if ($expr instanceof Expressions\Unary) {
$showParens = !$this->canParensBeOmittedFor($expr->getExpression());
$this->codeEmitter->raw($expr->getOperation());
if ($showParens) {
$this->codeEmitter->raw('(');
}
$this->expression($expr->getExpression());
if ($showParens) {
$this->codeEmitter->raw(')');
}
} else {
if ($expr instanceof Expressions\MethodCall) {
$this->codeEmitter->raw('helpers' . $this->createJsVariableDereference($expr->getMethodName()) . '(');
$arguments = $expr->getArguments();
for ($i = 0; $i < count($arguments); $i++) {
$this->expression($arguments[$i]);
if ($i < count($arguments) - 1) {
$this->codeEmitter->raw(', ');
}
}
$this->codeEmitter->raw(')');
} else {
if ($expr instanceof Expressions\GetAttribute) {
$this->expression($expr->getExpression());
$this->codeEmitter->raw($this->createJsVariableDereference($expr->getAttributeName()));
} else {
if ($expr instanceof Expressions\Variable) {
$this->codeEmitter->raw($this->currentContext . $this->createJsVariableDereference($expr->getVariableName()));
} else {
if ($expr instanceof Expressions\Scalar) {
$this->codeEmitter->raw($this->escapeScalar($expr->getValue()));
} else {
throw new \LogicException("Unknown expression class " . get_class($expr));
}
}
}
}
}
}
}
/**
* Helper function which returns true if the expression requires boolean input values
*
* @param Expression $expr
* @return bool
*/
protected static function expressionRequiresBooleanInput(Expression $expr)
{
return $expr instanceof Expressions\Binary && in_array($expr->getOperation(), [Expressions\Binary::OPERATOR_AND, Expressions\Binary::OPERATOR_OR]) || $expr instanceof Expressions\Unary && $expr->getOperation() === Expressions\Unary::OPERATION_NOT;
}
protected function expression(Expression $expr)
{
if ($expr instanceof Expressions\Binary) {
fwrite($this->output, "(");
$this->expression($expr->getLeft());
fwrite($this->output, " " . $expr->getOperation() . " ");
$this->expression($expr->getRight());
fwrite($this->output, ")");
} else {
if ($expr instanceof Expressions\Unary) {
$showParens = !$this->canParensBeOmittedFor($expr->getExpression());
fwrite($this->output, $expr->getOperation());
if ($showParens) {
fwrite($this->output, "(");
}
$this->expression($expr->getExpression());
if ($showParens) {
fwrite($this->output, ")");
}
} else {
if ($expr instanceof Expressions\MethodCall) {
fwrite($this->output, $expr->getMethodName() . "(");
$arguments = $expr->getArguments();
for ($i = 0; $i < count($arguments); $i++) {
$this->expression($arguments[$i]);
if ($i < count($arguments) - 1) {
fwrite($this->output, ", ");
}
}
fwrite($this->output, ")");
} else {
if ($expr instanceof Expressions\GetAttribute) {
$this->expression($expr->getExpression());
fwrite($this->output, '[' . $this->escapeScalar($expr->getAttributeName()) . ']');
} else {
if ($expr instanceof Expressions\Variable) {
fwrite($this->output, '$' . $this->currentContext . '[' . $this->escapeScalar($expr->getVariableName()) . ']');
} else {
if ($expr instanceof Expressions\Scalar) {
fwrite($this->output, $this->escapeScalar($expr->getValue()));
} else {
throw new \LogicException("Unknown expression class " . get_class($expr));
}
}
}
}
}
}
}
protected function expression(Expression $expr, $omitParens = false)
{
// TODO: implemente a more intelligent algorithm to decide whether or not to render parentheses
if ($expr instanceof Expressions\Binary) {
if (!$omitParens) {
fwrite($this->output, "(");
}
$this->expression($expr->getLeft());
fwrite($this->output, " " . $expr->getOperation() . " ");
$this->expression($expr->getRight());
if (!$omitParens) {
fwrite($this->output, ")");
}
} else {
if ($expr instanceof Expressions\Unary) {
$omitParens |= $this->canParensBeOmittedFor($expr->getExpression());
fwrite($this->output, $expr->getOperation());
if (!$omitParens) {
fwrite($this->output, "(");
}
$this->expression($expr->getExpression());
if (!$omitParens) {
fwrite($this->output, ")");
}
} else {
if ($expr instanceof Expressions\MethodCall) {
fwrite($this->output, $expr->getMethodName() . "(");
$arguments = $expr->getArguments();
for ($i = 0; $i < count($arguments); $i++) {
$this->expression($arguments[$i]);
if ($i < count($arguments) - 1) {
fwrite($this->output, ", ");
}
}
fwrite($this->output, ")");
} else {
if ($expr instanceof Expressions\GetAttribute) {
$this->expression($expr->getExpression());
fwrite($this->output, '.' . $expr->getAttributeName());
} else {
if ($expr instanceof Expressions\Variable) {
fwrite($this->output, $expr->getVariableName());
} else {
if ($expr instanceof Expressions\Scalar) {
fwrite($this->output, $this->escapeScalar($expr->getValue()));
} else {
throw new \LogicException("Unknown expression class " . get_class($expr));
}
}
}
}
}
}
}
