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Create drawWrappedString tag #34

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26 changes: 26 additions & 0 deletions trml2pdf/canv.py
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,31 @@ def _drawRightString(self, node):
self.canvas.drawRightString(
text=self._textual(node), **utils.attr_get(node, ['x', 'y']))

def _drawWrappedString(self, node):
text = self._textual(node)
if isinstance(text, bytes):
text = text.decode()
x = utils.unit_get(node.getAttribute('x'))
y = utils.unit_get(node.getAttribute('y'))
max_width = utils.unit_get(node.getAttribute('maxWidth'))
max_lines = int(node.getAttribute('maxLines'))
current_line = 1
while current_line <= max_lines:
tmp = text
width = self.canvas.stringWidth(tmp, self.canvas._fontname, self.canvas._fontsize)
while width > max_width:
# Chop off a word and try again
tmp = ' '.join(tmp.split()[:-1])
width = self.canvas.stringWidth(tmp, self.canvas._fontname, self.canvas._fontsize)
self.canvas.drawString(text=tmp, x=x, y=y)
# Remove the text we've just drawn from our string
text = ' '.join(text.split()[len(tmp.split()):])
# If we've run out of text, no more lines to draw
if not text:
break
y -= (self.canvas._fontsize * 1.2) # Line space at 1.2 times font size
current_line += 1

def _rect(self, node):
if node.hasAttribute('round'):
self.canvas.roundRect(radius=utils.unit_get(node.getAttribute(
Expand Down Expand Up @@ -319,6 +344,7 @@ def render(self, node):
'drawCenteredString': self._drawCenteredString,
'drawRightString': self._drawRightString,
'drawString': self._drawString,
'drawWrappedString': self._drawWrappedString,
'rect': self._rect,
'ellipse': self._ellipse,
'lines': self._lines,
Expand Down