Add a simplistic gidl writer, which can't do too much.

2008-04-18  Johan Dahlin  <jdahlin@async.com.br>

    * giscanner/gidlwriter.py:
    * giscanner/xmlwriter.py:
    * tools/g-ir-scanner:
    Add a simplistic gidl writer, which can't do too much.


svn path=/trunk/; revision=175

1 files changed, 55 insertions, 0 deletions

diff --git a/giscanner/xmlwriter.py b/giscanner/xmlwriter.py
new file mode 100644
index 00000000..2f80603d
--- /dev/null
+++ b/giscanner/xmlwriter.py
@@ -0,0 +1,55 @@
+from cStringIO import StringIO
+from xml.sax.saxutils import quoteattr
+
+
+class XMLWriter(object):
+    def __init__(self):
+        self._data = StringIO()
+        self._tag_stack = []
+        self._indent = 0
+
+    # Private
+
+    def _collect_attributes(self, attributes):
+        attrValue = ''
+        if attributes:
+            for attr, value in attributes:
+                assert value is not None, attr
+                attrValue += ' %s=%s' % (attr, quoteattr(value))
+        return attrValue
+
+    def _open_tag(self, tag_name, attributes=None):
+        attrs = self._collect_attributes(attributes)
+        self.write_line('<%s%s>' % (tag_name, attrs))
+
+    def _close_tag(self, tag_name):
+        self.write_line('</%s>' % (tag_name,))
+
+    # Public API
+
+    def get_xml(self):
+        return self._data.getvalue()
+
+    def write_line(self, line=''):
+        self._data.write('%s%s\n' % (' ' * self._indent, line))
+
+    def write_tag(self, tag_name, attributes):
+        attrs = self._collect_attributes(attributes)
+        self.write_line('<%s%s/>' % (tag_name, attrs))
+
+    def write_tag_with_data(self, tag_name, data, attributes=None):
+        if data is None:
+            self.write_tag(tag_name, attributes)
+        attrs = self._collect_attributes(attributes)
+        self.write_line('<%s%s>%s</%s>' % (tag_name, attrs, data, tag_name))
+
+    def push_tag(self, tag_name, attributes=None):
+        self._open_tag(tag_name, attributes)
+        self._tag_stack.append(tag_name)
+        self._indent += 2
+
+    def pop_tag(self):
+        self._indent -= 2
+        tag_name = self._tag_stack.pop()
+        self._close_tag(tag_name)
+        return tag_name