Fix multipage invoices

1 files changed, 30 insertions, 2 deletions

diff --git a/classes/correspondence.class.php b/classes/correspondence.class.php
index ac3da64..8330ea0 100644
--- a/classes/correspondence.class.php
+++ b/classes/correspondence.class.php
@@ -103,6 +103,13 @@ class correspondence extends FPDF {
     );
 
     /**
+     * @var $page_height            The height of a page in millimeters
+     * @var $margin_bottom          The bottom margin in millimeters
+     */
+    protected static $page_height   = 297; // A4
+    protected static $margin_bottom = 30;
+
+    /**
      * Translate a string
      * 
      * @see $translations           The array holding the translations
@@ -125,8 +132,8 @@ class correspondence extends FPDF {
      * @param string $unit          See the FPDF class specs
      * @param string $size          See the FPDF class specs
      */
-    function __construct($orientation='P',$unit='mm',$size='A4') {
-        $this->FPDF($orientation,$unit,$size);
+    function __construct() {
+        $this->FPDF('P','mm','A4');
         
         $this->SetMargins(30,20,20);
         $this->SetAuthor(constants::invoice_name);
@@ -282,4 +289,25 @@ class correspondence extends FPDF {
             $this->_out('/Creator '.$this->_textstring($this->creator));
         $this->_out('/CreationDate '.$this->_textstring('D:'.@date('YmdHis')));
     }
+
+    /**
+     * Have we reached the bottom of the page yet?
+     * 
+     * @return bool
+     */
+    public function endOfPage() {
+        return ($this->GetY() > self::$page_height - self::$margin_bottom);
+    }
+
+    /**
+     * Start a new page if we're on the end
+     */
+    public function addPageIfOnEnd() {
+        if ($this->endOfPage()) {
+            $this->Ln();
+            $this->AddPage();
+            $this->Cell(100, 5, ''); // blank line
+            $this->Ln();
+        }
+    }
 }
\ No newline at end of file