Rewrite PDF docgen without gtk.PrintOperation/PrintContext dependency.
svn: r9029
This commit is contained in:
Zsolt Foldvari
parent
6736044628
commit
cc63610f0d
@ -1,3 +1,6 @@
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2007-09-28 Zsolt Foldvari <zfoldvar@users.sourceforge.net>
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* src/docgen/PdfDoc.py: Rewrite without gtk.PrintOperation dependency.
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2007-09-28 Zsolt Foldvari <zfoldvar@users.sourceforge.net>
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* src/docgen/CairoDoc.py:
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* src/docgen/GtkPrint.py:
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@ -20,7 +20,7 @@
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# $Id$
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"""PDF output generator based on Cairo and gtk.PrintOperation.
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"""PDF output generator based on Cairo.
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"""
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__revision__ = "$Revision$"
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@ -31,6 +31,7 @@ __author__ = "Zsolt Foldvari"
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# Python modules
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#
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#------------------------------------------------------------------------
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from gettext import gettext as _
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import os
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#------------------------------------------------------------------------
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@ -39,9 +40,7 @@ import os
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#
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#------------------------------------------------------------------------
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from CairoDoc import CairoDoc
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from GtkPrint import paperstyle_to_pagesetup
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from PluginUtils import register_text_doc, register_draw_doc, register_book_doc
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import Errors
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import Utils
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import Mime
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@ -51,17 +50,25 @@ import Mime
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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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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 gtk
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import pango
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import cairo
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import pangocairo
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if gtk.pygtk_version < (2, 10, 0):
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raise Errors.UnavailableError(_("PyGtk 2.10 or later is required"))
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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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@ -69,95 +76,80 @@ if gtk.pygtk_version < (2, 10, 0):
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#
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#------------------------------------------------------------------------
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class PdfDoc(CairoDoc):
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"""Print document via GtkPrint* interface.
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Requires Gtk+ 2.10.
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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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"""Run the Gtk Print operation.
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"""Create the PDF output.
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"""
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# get a page setup from the paper style we have
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page_setup = paperstyle_to_pagesetup(self.paper)
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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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surface = cairo.PDFSurface(self._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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fontmap.set_resolution(DPI)
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# set up a print operation
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operation = gtk.PrintOperation()
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operation.set_default_page_setup(page_setup)
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operation.set_export_filename(self._filename)
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operation.connect("begin_print", self.on_begin_print)
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operation.connect("draw_page", self.on_draw_page)
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operation.connect("paginate", self.on_paginate)
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# export to PDF file
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operation.run(gtk.PRINT_OPERATION_ACTION_EXPORT, None)
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def on_begin_print(self, operation, context):
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"""Setup environment for printing.
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"""
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# get page size
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self.page_width = round(context.get_width())
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self.page_height = round(context.get_height())
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def on_paginate(self, operation, context):
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"""Paginate the whole document in chunks.
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"""
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layout = context.create_pango_layout()
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dpi_x = context.get_dpi_x()
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dpi_y = context.get_dpi_y()
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finished = self.paginate(layout,
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self.page_width,
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self.page_height,
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dpi_x,
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dpi_y)
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# update page number
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operation.set_n_pages(len(self._pages))
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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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# load the result into an external viewer
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if finished and self.print_req:
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apptype = 'application/pdf'
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app = Mime.get_application(apptype)
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if self.print_req:
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app = Mime.get_application('application/pdf')
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os.environ["FILE"] = self._filename
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os.system('%s "$FILE" &' % app[0])
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return finished
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def on_draw_page(self, operation, context, page_nr):
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"""Draw the requested page.
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"""
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cr = context.get_cairo_context()
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layout = context.create_pango_layout()
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dpi_x = context.get_dpi_x()
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dpi_y = context.get_dpi_y()
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self.draw_page(page_nr,
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cr,
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layout,
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self.page_width,
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self.page_height,
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dpi_x,
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dpi_y)
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#------------------------------------------------------------------------
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#
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# Functions
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#
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#------------------------------------------------------------------------
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def register_docgen():
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"""Register the docgen with the GRAMPS plugin system.
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"""
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try:
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mprog = Mime.get_application("application/pdf")
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mtype = Mime.get_description("application/pdf")
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if Utils.search_for(mprog[0]):
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print_label = _("Open in %s") % mprog[1]
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else:
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print_label = None
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except:
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mtype = _('PDF document')
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print_label = None
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#------------------------------------------------------------------------
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#
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# Register the document generator with the GRAMPS plugin system
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#
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#------------------------------------------------------------------------
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print_label = None
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try:
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mprog = Mime.get_application("application/pdf")
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mtype = Mime.get_description("application/pdf")
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if Utils.search_for(mprog[0]):
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print_label=_("Open in %s") % mprog[1]
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else:
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print_label=None
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register_text_doc(mtype, PdfDoc, 1, 1, 1, ".pdf", print_label)
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register_draw_doc(mtype, PdfDoc, 1, 1, ".pdf", print_label)
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register_book_doc(mtype,classref=PdfDoc,
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table=1,paper=1,style=1,ext=".pdf")
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except:
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register_text_doc(_('PDF document'), PdfDoc,1, 1, 1,".pdf", None)
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register_draw_doc(_('PDF document'), PdfDoc,1, 1, ".pdf", None)
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register_book_doc(name=_("PDF document"),classref=PdfDoc,
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table=1,paper=1,style=1,ext=".pdf")
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register_draw_doc(mtype, PdfDoc, 1, 1, ".pdf", print_label)
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register_book_doc(mtype, PdfDoc, 1, 1, 1, ".pdf", print_label)
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register_docgen()
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