[latex] Fix plugin, cleanup code
This commit is contained in:
Daniel Brötzmann
53
latex/config_dialog.py
Normal file
53
latex/config_dialog.py
Normal file
@@ -0,0 +1,53 @@
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# This file is part of Gajim.
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#
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# Gajim 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
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# by the Free Software Foundation; version 3 only.
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||||
#
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# Gajim is distributed in the hope that it will be useful,
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||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# 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 Gajim. If not, see <http://www.gnu.org/licenses/>.
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from gi.repository import GObject
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from gi.repository import Gtk
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from gajim.gtk.settings import SettingsDialog
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from gajim.gtk.settings import SpinSetting
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from gajim.gtk.const import Setting
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from gajim.gtk.const import SettingType
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from gajim.plugins.plugins_i18n import _
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class LatexPluginConfiguration(SettingsDialog):
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def __init__(self, plugin, parent):
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self.plugin = plugin
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settings = [
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Setting('LatexDPISpinSetting', _('PNG DPI'),
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SettingType.VALUE, int(self.plugin.config['png_dpi']),
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callback=self.on_setting, data='png_dpi',
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desc=_('Scale of the rendered PNG file'),
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props={'range_': (72, 300)}),
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]
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SettingsDialog.__init__(self, parent, _('Latex Configuration'),
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Gtk.DialogFlags.MODAL, settings, None,
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extend=[('LatexDPISpinSetting',
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DPISpinSetting)])
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def on_setting(self, value, data):
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self.plugin.config[data] = value
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class DPISpinSetting(SpinSetting):
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__gproperties__ = {
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"setting-value": (int, 'Size', '', 72, 300, 108,
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GObject.ParamFlags.READWRITE), }
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def __init__(self, *args, **kwargs):
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SpinSetting.__init__(self, *args, **kwargs)
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@@ -1,89 +0,0 @@
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<?xml version="1.0"?>
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<interface>
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<requires lib="gtk+" version="2.16"/>
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<!-- interface-naming-policy toplevel-contextual -->
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<object class="GtkTextBuffer" id="textbuffer1">
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<property name="text">Plug-in description should be displayed here. This text will be erased during PluginsWindow initialization.</property>
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</object>
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<object class="GtkWindow" id="window1">
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<child>
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<object class="GtkVBox" id="vbox1">
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<property name="visible">True</property>
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<property name="orientation">vertical</property>
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<property name="spacing">6</property>
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<child>
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<object class="GtkHBox" id="hbox111">
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<property name="visible">True</property>
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<property name="border_width">3</property>
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<property name="spacing">6</property>
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<child>
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<object class="GtkLabel" id="label1">
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<property name="visible">True</property>
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<property name="xalign">0</property>
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<property name="label" translatable="yes">PNG dpi:</property>
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</object>
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<packing>
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<property name="expand">False</property>
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<property name="fill">False</property>
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<property name="position">0</property>
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</packing>
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</child>
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<child>
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<object class="GtkEntry" id="png_dpi_label">
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<property name="visible">True</property>
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<property name="can_focus">True</property>
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<property name="invisible_char">●</property>
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<signal name="changed" handler="on_png_dpi_label_changed"/>
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</object>
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<packing>
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<property name="position">1</property>
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</packing>
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</child>
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</object>
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<packing>
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<property name="expand">False</property>
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<property name="position">0</property>
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</packing>
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</child>
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<child>
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<object class="GtkHBox" id="hbox1">
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<property name="visible">True</property>
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<child>
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<placeholder/>
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</child>
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<child>
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<object class="GtkButton" id="test_button">
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<property name="label" translatable="yes">Test Latex Configuration</property>
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<property name="visible">True</property>
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<property name="can_focus">True</property>
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<property name="receives_default">True</property>
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<signal name="clicked" handler="on_test_button_clicked"/>
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</object>
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<packing>
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<property name="expand">False</property>
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<property name="position">1</property>
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</packing>
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</child>
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<child>
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<placeholder/>
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</child>
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</object>
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<packing>
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<property name="expand">False</property>
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<property name="position">1</property>
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</packing>
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</child>
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<child>
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<object class="GtkLabel" id="result_label">
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<property name="visible">True</property>
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<property name="label" translatable="yes">Result:
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</property>
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</object>
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<packing>
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<property name="position">2</property>
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</packing>
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</child>
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</object>
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</child>
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</object>
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</interface>
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431
latex/latex.py
431
latex/latex.py
@@ -1,303 +1,83 @@
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# -*- coding: utf-8 -*-
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# Copyright (C) 2010-2011 Yves Fischer <yvesf AT xapek.org>
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# Copyright (C) 2011 Yann Leboulanger <asterix AT lagaule.org>
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#
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## plugins/latex/latex.py
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##
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## Copyright (C) 2010-2011 Yves Fischer <yvesf AT xapek.org>
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## Copyright (C) 2011 Yann Leboulanger <asterix AT lagaule.org>
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##
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## This file is part of Gajim.
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##
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## Gajim 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
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## by the Free Software Foundation; version 3 only.
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##
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## Gajim is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
## 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 Gajim. If not, see <http://www.gnu.org/licenses/>.
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##
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# This file is part of Gajim.
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||||
#
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# Gajim is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published
|
||||
# by the Free Software Foundation; version 3 only.
|
||||
#
|
||||
# Gajim is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# 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
|
||||
# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
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import os
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import random
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from tempfile import mkstemp, mkdtemp
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from threading import Thread
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from subprocess import Popen, PIPE
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import logging
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from functools import partial
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from gi.repository import Gtk
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from gi.repository import Gdk
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from gi.repository import GdkPixbuf
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from gi.repository import Pango
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from gi.repository import GObject
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from gi.repository import GLib
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from gi.repository import Pango
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from gajim.common import app
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from gajim.plugins import GajimPlugin
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from gajim.plugins.helpers import log, log_calls
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from gajim.plugins.gui import GajimPluginConfigDialog
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from gajim.plugins.plugins_i18n import _
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def latex_template(code):
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return '''\\documentclass[12pt]{article}
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\\usepackage[dvips]{graphicx}
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\\usepackage{amsmath}
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\\usepackage{amssymb}
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\\pagestyle{empty}
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\\begin{document}
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\\begin{large}
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\\begin{gather*}
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%s
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\\end{gather*}
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\\end{large}
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\\end{document}''' % (code)
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from latex.latex_renderer import LatexRenderer
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from latex.config_dialog import LatexPluginConfiguration
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from latex.util import try_run
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def write_latex(filename, str_):
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texstr = latex_template(str_)
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log = logging.getLogger('gajim.p.latex')
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file_ = open(filename, "w+")
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file_.write(texstr)
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file_.flush()
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file_.close()
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def popen_nt_friendly(command, directory):
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if os.name == 'nt':
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# CREATE_NO_WINDOW
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return Popen(command, creationflags=0x08000000, cwd=directory,
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stdout=PIPE)
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else:
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return Popen(command, cwd=directory, stdout=PIPE)
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def try_run(argv, directory):
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try:
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p = popen_nt_friendly(argv, directory)
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out = p.communicate()[0]
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log.info(out)
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return p.wait()
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except Exception as e:
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return _('Error executing "%(command)s": %(error)s') % {
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'command': " ".join(argv),
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'error': str(e)}
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BLACKLIST = ['\def', '\\let', '\\futurelet', '\\newcommand', '\\renewcomment',
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'\\else', '\\fi', '\\write', '\\input', '\\include', '\\chardef',
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'\\catcode', '\\makeatletter', '\\noexpand', '\\toksdef', '\\every',
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'\\errhelp', '\\errorstopmode', '\\scrollmode', '\\nonstopmode',
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'\\batchmode', '\\read', '\\csname', '\\newhelp', '\\relax', '\\afterground',
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'\\afterassignment', '\\expandafter', '\\noexpand', '\\special', '\\command',
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'\\loop', '\\repeat', '\\toks', '\\output', '\\line', '\\mathcode', '\\name',
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'\\item', '\\section', '\\mbox', '\\DeclareRobustCommand', '\\[', '\\]'
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]
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class LatexRenderer(Thread):
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def __init__(self, iter_start, iter_end, buffer_, widget, png_dpi):
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Thread.__init__(self)
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self.code = iter_start.get_text(iter_end)
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self.mark_name = 'LatexRendererMark%s' % str(random.randint(0,1000))
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self.mark = buffer_.create_mark(self.mark_name, iter_start, True)
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self.buffer_ = buffer_
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self.widget = widget
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self.png_dpi = png_dpi
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# delete code and show message 'processing'
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self.buffer_.delete(iter_start, iter_end)
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# iter_start.forward_char()
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self.buffer_.insert(iter_start, _('Processing LaTeX'))
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self.start() # start background processing
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def run(self):
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try:
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if self.check_code():
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self.show_image()
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else:
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self.show_error(_('There are bad commands!'))
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except Exception:
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self.show_error(_('Error processing LaTeX'))
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finally:
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self.buffer_.delete_mark(self.mark)
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def show_error(self, message):
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"""
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String -> TextBuffer
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"""
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Gdk.threads_enter()
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iter_mark = self.buffer_.get_iter_at_mark(self.mark)
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iter_end = iter_mark.copy().forward_search(_('Processing LaTeX'),
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Gtk.TextSearchFlags.TEXT_ONLY, None)[1]
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self.buffer_.delete(iter_mark, iter_end)
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pixbuf = self.widget.render_icon(Gtk.STOCK_STOP, Gtk.IconSize.BUTTON)
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self.buffer_.insert_pixbuf(iter_end, pixbuf)
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self.buffer_.insert(iter_end, message)
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Gdk.threads_leave()
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@log_calls('LatexRenderer')
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def show_image(self):
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"""
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Latex -> PNG -> TextBuffer
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"""
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def fg_str(fmt):
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try:
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return [{'hex' : '+level-colors', 'tex' : '-fg'}[fmt],
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app.interface.get_fg_color(fmt)]
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except KeyError:
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# interface may not be available when we test latex at startup
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return []
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except AttributeError:
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# interface may not be available when we test latext at startup
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return {'hex': ['+level-colors', '0x000000'],
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'tex': ['-fg', 'rgb 0.0 0.0 0.0']}[fmt]
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try:
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tmpdir = mkdtemp(prefix='gajim_tex')
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tmpfd, tmppng = mkstemp(prefix='gajim_tex', suffix='.png')
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os.close(tmpfd)
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except Exception:
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msg = 'Could not create temporary files for Latex plugin'
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log.debug(msg)
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self.show_error(_('latex error: %(error)s\n===ORIGINAL CODE====\n'
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'%(code)s') % {'error': msg, 'code': self.code[2:len(self.code)-2]})
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return False
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tmpfile = os.path.join(tmpdir, 'gajim_tex')
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# build latex string
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write_latex(tmpfile + '.tex', self.code[2:len(self.code)-2])
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# convert TeX to dvi
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exitcode = try_run(['latex', '--interaction=nonstopmode',
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tmpfile + '.tex'], tmpdir)
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if exitcode == 0:
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# convert dvi to png
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log.debug('DVI OK')
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exitcode = try_run(['dvipng', '-bg', 'Transparent'] + fg_str('tex')\
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+ ['-T', 'tight', '-D', self.png_dpi, tmpfile + '.dvi', '-o',
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tmpfile + '.png'], tmpdir)
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if exitcode:
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# dvipng failed, try convert
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log.debug('dvipng failed, try convert')
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exitcode = try_run(['convert'] + fg_str('hex') + ['-trim',
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'-density', self.png_dpi, tmpfile + '.dvi',
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tmpfile + '.png'], tmpdir)
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# remove temp files created by us and TeX
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extensions = ['.tex', '.log', '.aux', '.dvi']
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for ext in extensions:
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try:
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os.remove(tmpfile + ext)
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except Exception:
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pass
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if exitcode == 0:
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log.debug('PNG OK')
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os.rename(tmpfile + '.png', tmppng)
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else:
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log.debug('PNG FAILED')
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os.remove(tmppng)
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os.rmdir(tmpdir)
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self.show_error(_('Convertion to image failed\n===ORIGINAL CODE===='
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'\n%s') % self.code[2:len(self.code)-2])
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return False
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log.debug('Loading PNG %s' % tmppng)
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try:
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Gdk.threads_enter()
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pixbuf = GdkPixbuf.Pixbuf.new_from_file(tmppng)
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log.debug('png loaded')
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iter_mark = self.buffer_.get_iter_at_mark(self.mark)
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iter_end = iter_mark.copy().forward_search('Processing LaTeX',
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Gtk.TextSearchFlags.TEXT_ONLY, None)[1]
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log.debug('Delete old Text')
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self.buffer_.delete(iter_mark, iter_end)
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log.debug('Insert pixbuf')
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self.buffer_.insert_pixbuf(iter_end, pixbuf)
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except GObject.GError:
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self.show_error(_('Cannot open %s for reading') % tmppng)
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log.debug('Cant open %s for reading' % tmppng)
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finally:
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Gdk.threads_leave()
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os.remove(tmppng)
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def check_code(self):
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for bad_cmd in BLACKLIST:
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if self.code.find(bad_cmd) != -1:
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# Found bad command
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return False
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return True
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class LatexPluginConfiguration(GajimPluginConfigDialog):
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def init(self):
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self.GTK_BUILDER_FILE_PATH = self.plugin.local_file_path(
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'config_dialog.ui')
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self.xml = Gtk.Builder()
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self.xml.set_translation_domain('gajim_plugins')
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self.xml.add_objects_from_file(self.GTK_BUILDER_FILE_PATH, ['vbox1'])
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hbox = self.xml.get_object('vbox1')
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self.get_child().pack_start(hbox, False, False, 0)
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self.result_label = self.xml.get_object('result_label')
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self.xml.connect_signals(self)
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def on_run(self):
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widget = self.xml.get_object('png_dpi_label')
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widget.set_text(str(self.plugin.config['png_dpi']))
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|
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def show_result(self, msg):
|
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self.result_label.set_text(self.result_label.get_text() + '\n' + msg)
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def on_test_button_clicked(self,widget):
|
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"""
|
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performs very simple checks (check if executable is in PATH)
|
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"""
|
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self.show_result(_('Test Latex Binary'))
|
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exitcode = try_run(['latex', '-version'], None)
|
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if exitcode != 0:
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self.show_result(_(' No LaTeX binary found in PATH'))
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else:
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self.show_result(_(' OK'))
|
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|
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self.show_result(_('Test dvipng'))
|
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exitcode = try_run(['dvipng', '--version'], None)
|
||||
if exitcode != 0:
|
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self.show_result(_(' No dvipng binary found in PATH'))
|
||||
else:
|
||||
self.show_result(_(' OK'))
|
||||
|
||||
self.show_result(_('Test ImageMagick'))
|
||||
exitcode = try_run(['convert', '-version'], None)
|
||||
if exitcode != 0:
|
||||
self.show_result(_(' No convert binary found in PATH'))
|
||||
else:
|
||||
self.show_result(_(' OK'))
|
||||
|
||||
def on_png_dpi_label_changed(self, label):
|
||||
self.plugin.config['png_dpi'] = label.get_text()
|
||||
|
||||
class LatexPlugin(GajimPlugin):
|
||||
def init(self):
|
||||
self.description = _('Invoke Latex to render $$foobar$$ sourrounded ' \
|
||||
'Latex equations. Needs latex and dvipng or ImageMagick.')
|
||||
self.config_dialog = LatexPluginConfiguration(self)
|
||||
self.config_default_values = {'png_dpi': ('108', '')}
|
||||
self.description = _(
|
||||
'Render LaTeX markup for $$foobar$$ sourrounded LaTeX equations.')
|
||||
self.config_dialog = partial(LatexPluginConfiguration, self)
|
||||
|
||||
self.gui_extension_points = {
|
||||
'chat_control_base': (self.connect_with_chat_control_base,
|
||||
self.disconnect_from_chat_control_base)
|
||||
self.config_default_values = {
|
||||
'png_dpi': ('108', '')
|
||||
}
|
||||
self.gui_extension_points = {
|
||||
'chat_control_base': (
|
||||
self._connect_chat_control_base,
|
||||
self._disconnect_chat_control_base)
|
||||
}
|
||||
self.test_activatable()
|
||||
self.timeout_id = None
|
||||
self.last_eol_offset = -1
|
||||
|
||||
def test_activatable(self):
|
||||
self._test_activatable()
|
||||
self._timeout_id = None
|
||||
self._last_eol_offset = -1
|
||||
|
||||
def _connect_chat_control_base(self, chat_control):
|
||||
d = {}
|
||||
tv = chat_control.conv_textview.tv
|
||||
tb = tv.get_buffer()
|
||||
|
||||
self._latex_tag = Gtk.TextTag.new('latex')
|
||||
self._latex_tag.set_property('foreground', 'blue')
|
||||
self._latex_tag.set_property('underline', Pango.Underline.SINGLE)
|
||||
d['tag_id'] = self._latex_tag.connect('event', self._textview_event_after)
|
||||
tb.get_tag_table().add(self._latex_tag)
|
||||
|
||||
d['h_id'] = tb.connect('changed', self._textbuffer_live_latex_expander)
|
||||
chat_control.latexs_expander_plugin_data = d
|
||||
|
||||
return True
|
||||
|
||||
def _disconnect_chat_control_base(self, chat_control):
|
||||
d = chat_control.latexs_expander_plugin_data
|
||||
tv = chat_control.conv_textview.tv
|
||||
|
||||
tv.get_buffer().disconnect(d['h_id'])
|
||||
self._latex_tag.disconnect(d['tag_id'])
|
||||
|
||||
def _test_activatable(self):
|
||||
"""
|
||||
performs very simple checks (check if executable is in PATH)
|
||||
"""
|
||||
@@ -329,6 +109,7 @@ class LatexPlugin(GajimPlugin):
|
||||
pkgs = 'texlive-latex-base'
|
||||
self.available_text = _('LaTeX is not available')
|
||||
self.activatable = False
|
||||
|
||||
if not dvipng_available and not imagemagick_available:
|
||||
if os.name == 'nt':
|
||||
if not pkgs:
|
||||
@@ -345,85 +126,65 @@ class LatexPlugin(GajimPlugin):
|
||||
self.activatable = False
|
||||
self.available_text += _('. Install %s') % pkgs
|
||||
|
||||
def textview_event_after(self, tag, widget, event, iter_):
|
||||
def _textview_event_after(self, tag, widget, event, iter_):
|
||||
"""
|
||||
start rendering if clicked on a link
|
||||
"""
|
||||
if tag.get_property('name') != 'latex' or \
|
||||
event.type != Gdk.EventType.BUTTON_PRESS:
|
||||
return
|
||||
dollar_start, iter_start = iter_.backward_search('$$',
|
||||
dollar_start, _iter_start = iter_.backward_search(
|
||||
'$$',
|
||||
Gtk.TextSearchFlags.TEXT_ONLY, None)
|
||||
iter_end, dollar_end = iter_.forward_search('$$',
|
||||
_iter_end, dollar_end = iter_.forward_search(
|
||||
'$$',
|
||||
Gtk.TextSearchFlags.TEXT_ONLY, None)
|
||||
LatexRenderer(dollar_start, dollar_end, widget.get_buffer(), widget,
|
||||
self.config['png_dpi'])
|
||||
LatexRenderer(dollar_start, dollar_end, widget, self.config['png_dpi'])
|
||||
|
||||
def textbuffer_live_latex_expander(self, tb):
|
||||
def _textbuffer_live_latex_expander(self, tb):
|
||||
"""
|
||||
called when conversation text widget changes
|
||||
"""
|
||||
def split_list(list_):
|
||||
def _split_list(list_):
|
||||
newlist = []
|
||||
for i in range(0, len(list_)-1, 2):
|
||||
newlist.append( [ list_[i], list_[i+1], ] )
|
||||
newlist.append([ list_[i], list_[i+1], ])
|
||||
return newlist
|
||||
|
||||
def detect_tags(tb, start_it=None, end_it=None):
|
||||
self.timeout_id = None
|
||||
if not end_it:
|
||||
end_it = tb.get_end_iter()
|
||||
if not start_it:
|
||||
eol_tag = tb.get_tag_table().lookup('eol')
|
||||
start_it = end_it.copy()
|
||||
def _detect_tags(tb, start_it=None, end_it=None):
|
||||
self._timeout_id = None
|
||||
if not end_it:
|
||||
end_it = tb.get_end_iter()
|
||||
if not start_it:
|
||||
eol_tag = tb.get_tag_table().lookup('eol')
|
||||
start_it = end_it.copy()
|
||||
start_it.backward_to_tag_toggle(eol_tag)
|
||||
points = []
|
||||
tuple_found = start_it.forward_search('$$',
|
||||
tuple_found = start_it.forward_search(
|
||||
'$$',
|
||||
Gtk.TextSearchFlags.TEXT_ONLY, None)
|
||||
while tuple_found != None:
|
||||
while tuple_found is not None:
|
||||
points.append(tuple_found)
|
||||
tuple_found = tuple_found[1].forward_search('$$',
|
||||
tuple_found = tuple_found[1].forward_search(
|
||||
'$$',
|
||||
Gtk.TextSearchFlags.TEXT_ONLY, None)
|
||||
|
||||
for pair in split_list(points):
|
||||
for pair in _split_list(points):
|
||||
tb.apply_tag_by_name('latex', pair[0][1], pair[1][0])
|
||||
|
||||
end_iter = tb.get_end_iter()
|
||||
eol_tag = tb.get_tag_table().lookup('eol')
|
||||
it = end_iter.copy()
|
||||
it.backward_to_tag_toggle(eol_tag)
|
||||
if it.get_offset() == self.last_eol_offset:
|
||||
if self.timeout_id:
|
||||
GObject.source_remove(self.timeout_id)
|
||||
self.timeout_id = GObject.timeout_add(100, detect_tags, tb, it, end_iter)
|
||||
if it.get_offset() == self._last_eol_offset:
|
||||
if self._timeout_id:
|
||||
GLib.source_remove(self._timeout_id)
|
||||
self._timeout_id = GLib.timeout_add(100, _detect_tags, tb, it, end_iter)
|
||||
else:
|
||||
if self.timeout_id:
|
||||
GObject.source_remove(self.timeout_id)
|
||||
it1 = it.copy()
|
||||
it1.backward_char()
|
||||
it1.backward_to_tag_toggle(eol_tag)
|
||||
detect_tags(tb, it1, it)
|
||||
self.last_eol_offset = it.get_offset()
|
||||
|
||||
def connect_with_chat_control_base(self, chat_control):
|
||||
d = {}
|
||||
tv = chat_control.conv_textview.tv
|
||||
tb = tv.get_buffer()
|
||||
|
||||
self.latex_tag = Gtk.TextTag.new('latex')
|
||||
self.latex_tag.set_property('foreground', 'blue')
|
||||
self.latex_tag.set_property('underline', Pango.Underline.SINGLE)
|
||||
d['tag_id'] = self.latex_tag.connect('event', self.textview_event_after)
|
||||
tb.get_tag_table().add(self.latex_tag)
|
||||
|
||||
d['h_id'] = tb.connect('changed', self.textbuffer_live_latex_expander)
|
||||
chat_control.latexs_expander_plugin_data = d
|
||||
|
||||
return True
|
||||
|
||||
def disconnect_from_chat_control_base(self, chat_control):
|
||||
d = chat_control.latexs_expander_plugin_data
|
||||
tv = chat_control.conv_textview.tv
|
||||
|
||||
tv.get_buffer().disconnect(d['h_id'])
|
||||
self.latex_tag.disconnect(d['tag_id'])
|
||||
if self._timeout_id:
|
||||
GLib.source_remove(self._timeout_id)
|
||||
it1 = it.copy()
|
||||
it1.backward_char()
|
||||
it1.backward_to_tag_toggle(eol_tag)
|
||||
_detect_tags(tb, it1, it)
|
||||
self._last_eol_offset = it.get_offset()
|
||||
|
||||
175
latex/latex_renderer.py
Normal file
175
latex/latex_renderer.py
Normal file
@@ -0,0 +1,175 @@
|
||||
# Copyright (C) 2010-2011 Yves Fischer <yvesf AT xapek.org>
|
||||
# Copyright (C) 2011 Yann Leboulanger <asterix AT lagaule.org>
|
||||
#
|
||||
# This file is part of Gajim.
|
||||
#
|
||||
# Gajim is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published
|
||||
# by the Free Software Foundation; version 3 only.
|
||||
#
|
||||
# Gajim is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import random
|
||||
import os
|
||||
import logging
|
||||
from tempfile import mkstemp
|
||||
from tempfile import mkdtemp
|
||||
|
||||
from gi.repository import Gtk
|
||||
from gi.repository import GdkPixbuf
|
||||
from gi.repository import GLib
|
||||
|
||||
from gajim.common import app
|
||||
|
||||
from gajim.plugins.plugins_i18n import _
|
||||
|
||||
from latex.util import try_run
|
||||
from latex.util import write_latex
|
||||
from latex.util import BLACKLIST
|
||||
|
||||
log = logging.getLogger('gajim.p.latex')
|
||||
|
||||
|
||||
class LatexRenderer:
|
||||
def __init__(self, iter_start, iter_end, widget, png_dpi):
|
||||
self.widget = widget
|
||||
self.buffer = widget.get_buffer()
|
||||
self.code = iter_start.get_text(iter_end)
|
||||
self.mark_name = 'LatexRendererMark%s' % str(random.randint(0, 1000))
|
||||
self.mark = self.buffer.create_mark(self.mark_name, iter_start, True)
|
||||
self.png_dpi = str(png_dpi)
|
||||
|
||||
# delete code and show message 'processing'
|
||||
self.buffer.delete(iter_start, iter_end)
|
||||
self.buffer.insert(iter_start, _('Processing LaTeX'))
|
||||
self._start_processing()
|
||||
|
||||
def _start_processing(self):
|
||||
try:
|
||||
if self._check_code():
|
||||
self._show_image()
|
||||
else:
|
||||
self._show_error(_('There are bad commands!'))
|
||||
except Exception as err:
|
||||
self._show_error(_('Error processing LaTeX: %s' % err))
|
||||
finally:
|
||||
self.buffer.delete_mark(self.mark)
|
||||
|
||||
def _check_code(self):
|
||||
for bad_cmd in BLACKLIST:
|
||||
if self.code.find(bad_cmd) != -1:
|
||||
# Found bad command
|
||||
return False
|
||||
return True
|
||||
|
||||
def _show_error(self, message):
|
||||
"""
|
||||
String -> TextBuffer
|
||||
"""
|
||||
iter_mark = self.buffer.get_iter_at_mark(self.mark)
|
||||
iter_end = iter_mark.copy().forward_search(
|
||||
_('Processing LaTeX'),
|
||||
Gtk.TextSearchFlags.TEXT_ONLY, None)[1]
|
||||
self.buffer.delete(iter_mark, iter_end)
|
||||
self.buffer.insert(iter_end, message)
|
||||
|
||||
def _show_image(self):
|
||||
"""
|
||||
Latex -> PNG -> TextBuffer
|
||||
"""
|
||||
|
||||
def _fg_str(fmt):
|
||||
try:
|
||||
return [
|
||||
{'hex' : '+level-colors', 'tex' : '-fg'}[fmt],
|
||||
app.interface.get_fg_color(fmt)]
|
||||
except KeyError:
|
||||
# interface may not be available when we test latex at startup
|
||||
return []
|
||||
except AttributeError:
|
||||
# interface may not be available when we test latext at startup
|
||||
return {'hex': ['+level-colors', '0x000000'],
|
||||
'tex': ['-fg', 'rgb 0.0 0.0 0.0']}[fmt]
|
||||
|
||||
try:
|
||||
tmpdir = mkdtemp(prefix='gajim_tex')
|
||||
tmpfd, tmppng = mkstemp(prefix='gajim_tex', suffix='.png')
|
||||
os.close(tmpfd)
|
||||
except Exception:
|
||||
msg = 'Could not create temporary files for Latex plugin'
|
||||
log.debug(msg)
|
||||
self._show_error(
|
||||
_('latex error: %(error)s\n===ORIGINAL CODE====\n'
|
||||
'%(code)s') % {
|
||||
'error': msg,
|
||||
'code': self.code[2:len(self.code)-2]})
|
||||
return False
|
||||
|
||||
tmpfile = os.path.join(tmpdir, 'gajim_tex')
|
||||
|
||||
# build latex string
|
||||
write_latex(tmpfile + '.tex', self.code[2:len(self.code)-2])
|
||||
|
||||
# convert TeX to dvi
|
||||
exitcode = try_run(
|
||||
['latex', '--interaction=nonstopmode', tmpfile + '.tex'], tmpdir)
|
||||
|
||||
if exitcode == 0:
|
||||
# convert dvi to png
|
||||
log.debug('DVI OK')
|
||||
exitcode = try_run(
|
||||
['dvipng', '-bg', 'Transparent'] + _fg_str('tex') + \
|
||||
['-T', 'tight', '-D', self.png_dpi, tmpfile + '.dvi', '-o',
|
||||
tmpfile + '.png'], tmpdir)
|
||||
|
||||
if exitcode:
|
||||
# dvipng failed, try convert
|
||||
log.debug('dvipng failed, try convert')
|
||||
exitcode = try_run(
|
||||
['convert'] + _fg_str('hex') + \
|
||||
['-trim', '-density', self.png_dpi,
|
||||
tmpfile + '.dvi', tmpfile + '.png'], tmpdir)
|
||||
|
||||
# remove temp files created by us and TeX
|
||||
extensions = ['.tex', '.log', '.aux', '.dvi']
|
||||
for ext in extensions:
|
||||
try:
|
||||
os.remove(tmpfile + ext)
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
if exitcode == 0:
|
||||
log.debug('PNG OK')
|
||||
os.rename(tmpfile + '.png', tmppng)
|
||||
else:
|
||||
log.debug('PNG FAILED')
|
||||
os.remove(tmppng)
|
||||
os.rmdir(tmpdir)
|
||||
self._show_error(
|
||||
_('Convertion to image failed\n===ORIGINAL CODE===='
|
||||
'\n%s') % self.code[2:len(self.code)-2])
|
||||
return False
|
||||
|
||||
log.debug('Loading PNG %s', tmppng)
|
||||
try:
|
||||
pixbuf = GdkPixbuf.Pixbuf.new_from_file(tmppng)
|
||||
log.debug('png loaded')
|
||||
iter_mark = self.buffer.get_iter_at_mark(self.mark)
|
||||
iter_end = iter_mark.copy().forward_search(
|
||||
_('Processing LaTeX'),
|
||||
Gtk.TextSearchFlags.TEXT_ONLY, None)[1]
|
||||
log.debug('Delete old Text')
|
||||
self.buffer.delete(iter_mark, iter_end)
|
||||
log.debug('Insert pixbuf')
|
||||
self.buffer.insert_pixbuf(iter_end, pixbuf)
|
||||
except GLib.GError:
|
||||
self._show_error(_('Cannot open %s for reading') % tmppng)
|
||||
log.debug('Cant open %s for reading', tmppng)
|
||||
finally:
|
||||
os.remove(tmppng)
|
||||
115
latex/util.py
Normal file
115
latex/util.py
Normal file
@@ -0,0 +1,115 @@
|
||||
# This file is part of Gajim.
|
||||
#
|
||||
# Gajim is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published
|
||||
# by the Free Software Foundation; version 3 only.
|
||||
#
|
||||
# Gajim is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import logging
|
||||
import os
|
||||
from subprocess import Popen
|
||||
from subprocess import PIPE
|
||||
|
||||
from gajim.plugins.plugins_i18n import _
|
||||
|
||||
log = logging.getLogger('gajim.p.latex')
|
||||
|
||||
BLACKLIST = [
|
||||
'\def',
|
||||
'\\let',
|
||||
'\\futurelet',
|
||||
'\\newcommand',
|
||||
'\\renewcomment',
|
||||
'\\else',
|
||||
'\\fi',
|
||||
'\\write',
|
||||
'\\input',
|
||||
'\\include',
|
||||
'\\chardef',
|
||||
'\\catcode',
|
||||
'\\makeatletter',
|
||||
'\\noexpand',
|
||||
'\\toksdef',
|
||||
'\\every',
|
||||
'\\errhelp',
|
||||
'\\errorstopmode',
|
||||
'\\scrollmode',
|
||||
'\\nonstopmode',
|
||||
'\\batchmode',
|
||||
'\\read',
|
||||
'\\csname',
|
||||
'\\newhelp',
|
||||
'\\relax',
|
||||
'\\afterground',
|
||||
'\\afterassignment',
|
||||
'\\expandafter',
|
||||
'\\noexpand',
|
||||
'\\special',
|
||||
'\\command',
|
||||
'\\loop',
|
||||
'\\repeat',
|
||||
'\\toks',
|
||||
'\\output',
|
||||
'\\line',
|
||||
'\\mathcode',
|
||||
'\\name',
|
||||
'\\item',
|
||||
'\\section',
|
||||
'\\mbox',
|
||||
'\\DeclareRobustCommand',
|
||||
'\\[',
|
||||
'\\]',
|
||||
]
|
||||
|
||||
|
||||
def try_run(argv, directory):
|
||||
try:
|
||||
proc = popen_nt_friendly(argv, directory)
|
||||
out = proc.communicate()[0]
|
||||
log.info(out)
|
||||
return proc.wait()
|
||||
except Exception as err:
|
||||
return _('Error executing "%(command)s": %(error)s') % {
|
||||
'command': " ".join(argv),
|
||||
'error': str(err)}
|
||||
|
||||
|
||||
def popen_nt_friendly(command, directory):
|
||||
if os.name == 'nt':
|
||||
# CREATE_NO_WINDOW
|
||||
return Popen(command, creationflags=0x08000000, cwd=directory,
|
||||
stdout=PIPE)
|
||||
return Popen(command, cwd=directory, stdout=PIPE)
|
||||
|
||||
|
||||
def write_latex(filename, string):
|
||||
texstr = _get_latex_template(string)
|
||||
|
||||
file_ = open(filename, 'w+')
|
||||
file_.write(texstr)
|
||||
file_.flush()
|
||||
file_.close()
|
||||
|
||||
|
||||
def _get_latex_template(code):
|
||||
template = '''
|
||||
\\documentclass[12pt]{article}
|
||||
\\usepackage[dvips]{graphicx}
|
||||
\\usepackage{amsmath}
|
||||
\\usepackage{amssymb}
|
||||
\\pagestyle{empty}
|
||||
\\begin{document}
|
||||
\\begin{large}
|
||||
\\begin{gather*}
|
||||
%s
|
||||
\\end{gather*}
|
||||
\\end{large}
|
||||
\\end{document}''' % (code)
|
||||
return template
|
||||
Reference in New Issue
Block a user