126 lines
4.2 KiB
Python
126 lines
4.2 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2007 Zsolt Foldvari
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# Copyright (C) 2008 Brian G. Matherly
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# $Id$
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"""PDF output generator based on Cairo.
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"""
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#------------------------------------------------------------------------
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#
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# Python modules
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#
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#------------------------------------------------------------------------
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from gen.ggettext import gettext as _
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import sys
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#------------------------------------------------------------------------
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#
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# Gramps modules
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#
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#------------------------------------------------------------------------
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import libcairodoc
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#------------------------------------------------------------------------
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#
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# Set up logging
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#
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#------------------------------------------------------------------------
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import logging
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LOG = logging.getLogger(".PdfDoc")
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#-------------------------------------------------------------------------
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#
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# GTK modules
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#
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#-------------------------------------------------------------------------
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import pango
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import cairo
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import pangocairo
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#------------------------------------------------------------------------
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#
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# Constants
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#
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#------------------------------------------------------------------------
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# resolution
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DPI = 72.0
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#------------------------------------------------------------------------
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#
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# PdfDoc class
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#
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#------------------------------------------------------------------------
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class PdfDoc(libcairodoc.CairoDoc):
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"""Render the document into PDF file using Cairo.
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"""
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def run(self):
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"""Create the PDF output.
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"""
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# get paper dimensions
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paper_width = self.paper.get_size().get_width() * DPI / 2.54
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paper_height = self.paper.get_size().get_height() * DPI / 2.54
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page_width = round(self.paper.get_usable_width() * DPI / 2.54)
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page_height = round(self.paper.get_usable_height() * DPI / 2.54)
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left_margin = self.paper.get_left_margin() * DPI / 2.54
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top_margin = self.paper.get_top_margin() * DPI / 2.54
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# create cairo context and pango layout
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filename = self._backend.filename.encode(sys.getfilesystemencoding())
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surface = cairo.PDFSurface(filename, paper_width, paper_height)
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surface.set_fallback_resolution(300, 300)
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cr = pangocairo.CairoContext(cairo.Context(surface))
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fontmap = pangocairo.cairo_font_map_get_default()
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saved_resolution = fontmap.get_resolution()
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fontmap.set_resolution(DPI)
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pango_context = fontmap.create_context()
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options = cairo.FontOptions()
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options.set_hint_metrics(cairo.HINT_METRICS_OFF)
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pangocairo.context_set_font_options(pango_context, options)
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layout = pango.Layout(pango_context)
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cr.update_context(pango_context)
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# paginate the document
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finished = self.paginate(layout, page_width, page_height, DPI, DPI)
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while not finished:
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finished = self.paginate(layout, page_width, page_height, DPI, DPI)
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# render the pages
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for page_nr in range(len(self._pages)):
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cr.save()
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cr.translate(left_margin, top_margin)
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self.draw_page(page_nr, cr, layout,
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page_width, page_height,
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DPI, DPI)
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cr.show_page()
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cr.restore()
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# close the surface (file)
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surface.finish()
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# Restore the resolution. On windows, Gramps UI fonts will be smaller
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# if we don't restore the resolution.
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fontmap.set_resolution(saved_resolution)
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