Add gdb pretty-printers for basegfx

First cut - polygons and B2DRange covered.

Change-Id: I042bff8c3fa5c889a926d450090494e2e20f76b1

1 files changed, 170 insertions, 0 deletions

diff --git a/solenv/gdb/libreoffice/basegfx.py b/solenv/gdb/libreoffice/basegfx.py
new file mode 100644
index 000000000000..10381c1210fa
--- /dev/null
+++ b/solenv/gdb/libreoffice/basegfx.py
@@ -0,0 +1,170 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+import gdb
+
+from libreoffice.util import printing
+
+class B2DRangePrinter(object):
+    '''Prints a B2DRange object.'''
+
+    def __init__(self, typename, value):
+        self.typename = typename
+        self.value = value
+        # inject children() func dynamically
+        if not self._isEmpty():
+            self.children = self._children
+
+    def to_string(self):
+        if self._isEmpty():
+            return "empty %s" % (self.typename)
+        else:
+            return "%s" % (self.typename)
+
+    def _isEmpty(self):
+        return (self.value['maRangeX']['mnMinimum'] > self.value['maRangeX']['mnMaximum']
+                or self.value['maRangeY']['mnMinimum'] > self.value['maRangeY']['mnMaximum'])
+
+    def _children(self):
+        left = self.value['maRangeX']['mnMinimum']
+        top = self.value['maRangeY']['mnMinimum']
+        right = self.value['maRangeX']['mnMaximum']
+        bottom = self.value['maRangeY']['mnMaximum']
+        children = [('left', left), ('top', top), ('right', right), ('bottom', bottom)]
+        return children.__iter__()
+
+class B2DPolygonPrinter(object):
+    '''Prints a B2DPolygon object.'''
+
+    def __init__(self, typename, value):
+        self.typename = typename
+        self.value = value
+        # inject children() func dynamically
+        if not self._isEmpty():
+            self.children = self._children
+
+    def to_string(self):
+        if self._isEmpty():
+            return "empty %s" % (self.typename)
+        else:
+            return "%s %s" % ('bezier curve' if self._hasCurves() else 'straight line',
+                              self.typename)
+
+    def _count(self):
+        return int(gdb.parse_and_eval(
+                '((basegfx::B2DPolygon*)%d)->count()' % self.value.address))
+
+    def _isEmpty(self):
+        return self._count() == 0
+
+    def _hasCurves(self):
+        return int(gdb.parse_and_eval(
+                '((basegfx::B2DPolygon*)%d)->areControlPointsUsed()' % self.value.address)) != 0
+
+    def _children(self):
+        if self._hasCurves():
+            return self._bezierIterator(self._count(), self.value)
+        else:
+            return self._plainIterator(self._count(), self.value)
+
+    class _plainIterator(object):
+        def __init__(self, count, value):
+            self.count = count
+            self.value = value
+            self.index = 0
+
+        def __iter__(self):
+            return self
+
+        def next(self):
+            if self.index >= self.count:
+                raise StopIteration()
+            currPoint = gdb.parse_and_eval(
+                    '((basegfx::B2DPolygon*)%d)->getB2DPoint(%d)' % (
+                      self.value.address, self.index))
+            currPoint = gdb.parse_and_eval(
+                    '((basegfx::B2DPolygon*)%d)->getB2DPoint(%d)' % (
+                      self.value.address, self.index))
+            self.index += 1
+            return ('point %d' % (self.index-1),
+                    '(%15f, %15f)' % (currPoint['mfX'], currPoint['mfY']))
+
+    class _bezierIterator(object):
+        def __init__(self, count, value):
+            self.count = count
+            self.value = value
+            self.index = 0
+
+        def __iter__(self):
+            return self
+
+        def next(self):
+            if self.index >= self.count:
+                raise StopIteration()
+            currPoint = gdb.parse_and_eval(
+                    '((basegfx::B2DPolygon*)%d)->getB2DPoint(%d)' % (
+                      self.value.address, self.index))
+            prevControl = gdb.parse_and_eval(
+                    '((basegfx::B2DPolygon*)%d)->getPrevControlPoint(%d)' % (
+                      self.value.address, self.index))
+            nextControl = gdb.parse_and_eval(
+                    '((basegfx::B2DPolygon*)%d)->getNextControlPoint(%d)' % (
+                      self.value.address, self.index))
+            self.index += 1
+            return ('point %d' % (self.index-1),
+                    'p: (%15f, %15f) c-1: (%15f, %15f) c1: (%15f, %15f)' %
+                    (currPoint['mfX'],   currPoint['mfY'],
+                     prevControl['mfX'], prevControl['mfY'],
+                     nextControl['mfX'], nextControl['mfY']))
+
+class B2DPolyPolygonPrinter(object):
+    '''Prints a B2DPolyPolygon object.'''
+
+    def __init__(self, typename, value):
+        self.typename = typename
+        self.value = value
+
+    def to_string(self):
+        if self._isEmpty():
+            return "empty %s" % (self.typename)
+        else:
+            return "%s %s with %d sub-polygon(s)" % ('closed' if self._isClosed() else 'open',
+                                                     self.typename,
+                                                     self._count())
+
+    def _count(self):
+        return int(gdb.parse_and_eval(
+                '((basegfx::B2DPolyPolygon*)%d)->count()' % self.value.address))
+
+    def _isClosed(self):
+        return int(gdb.parse_and_eval(
+                '((basegfx::B2DPolyPolygon*)%d)->isClosed()' % self.value.address)) != 0
+
+    def _isEmpty(self):
+        return self._count() == 0
+
+printer = None
+
+def build_pretty_printers():
+    global printer
+
+    printer = printing.Printer('libreoffice/basegfx')
+
+    # basic types
+    printer.add('basegfx::B2DRange', B2DRangePrinter)
+    printer.add('basegfx::B2DPolygon', B2DPolygonPrinter)
+    printer.add('basegfx::B2DPolyPolygon', B2DPolyPolygonPrinter)
+
+def register_pretty_printers(obj):
+    printing.register_pretty_printer(printer, obj)
+
+build_pretty_printers()
+
+# vim:set shiftwidth=4 softtabstop=4 expandtab:
+