add Crop option

cups-pdf-postprocess.py

@@ -80,6 +80,38 @@ class CPP(QWidget):
     o.setWordWrap(True)
     vbox.addWidget(o)
 
+    def margin_spinbox(name, layout):
+      hbox = QHBoxLayout()
+      hbox.addWidget(QLabel(name))
+      s = QSpinBox(self)
+      s.setMinimum(0)
+      s.setMaximum(100)
+      s.setSingleStep(1)
+      s.setValue(20)
+      s.setEnabled(False)
+      hbox.addWidget(s)
+      layout.addLayout(hbox)
+      return s
+
+    hbox = QHBoxLayout()
+    self._crop = QCheckBox('Crop', self)
+    hbox.addWidget(self._crop)
+    _vbox = QVBoxLayout()
+    _vbox.addWidget(QLabel("Margins [mm]"))
+    self._crop_margin = (
+      margin_spinbox("Left", _vbox),
+      margin_spinbox("Top", _vbox),
+      margin_spinbox("Right", _vbox),
+      margin_spinbox("Bottom", _vbox),
+    )
+    hbox.addLayout(_vbox)
+    vbox.addLayout(hbox)
+
+    def _crop_changed(checked):
+      for m in self._crop_margin:
+        m.setEnabled(checked)
+    self._crop.clicked[bool].connect(_crop_changed)
+
     hbox = QHBoxLayout()
     self._compact = QCheckBox('Compact', self)
     self._compact_copies = QSpinBox(self)
@@ -167,6 +199,13 @@ class CPP(QWidget):
       log.append(msg)
       self._logger.setPlainText("".join(log))
 
+    MM_TO_BP = 2.83465
+
+    if self._crop.isChecked():
+      margin = " ".join([ "%d" % (MM_TO_BP * m.value()) for m in self._crop_margin ])
+      pipeline.append([ "%s/pdfcrop_wrapper.sh" % DIR,
+                        "--margin", margin, "-", "/dev/stdout" ])
+
     if self._pdfbook.isChecked():
       pipeline.append([ "pdfbook", "/dev/stdin", "-o", "/dev/stdout" ])
 

pdfcrop_wrapper.sh

+#!/bin/bash
+
+cd /tmp
+exec pdfcrop "$@"
+