Add document widget

issue10173
review330471004

CHANGELOG

@@ -1,3 +1,4 @@
+* Support document widget
 * Support icon of type URL
 * Allow sending email with existing attachments
 * Add paths and model context to action data

bin/tryton

@@ -17,6 +17,7 @@ if hasattr(sys, 'frozen'):
     prefix = os.path.dirname(sys.executable)
     os.environ['GTK_EXE_PREFIX'] = prefix
     os.environ['GTK_DATA_PREFIX'] = prefix
+    os.environ['EVINCE_BACKENDS_DIR'] = prefix
     os.environ['XDG_DATA_DIRS'] = os.path.join(prefix, 'share')
     etc = os.path.join(prefix, 'etc')
     os.environ['GDK_PIXBUF_MODULE_FILE'] = os.path.join(

setup-freeze.py

@@ -29,6 +29,8 @@ include_files = [
         os.path.join('lib', 'gtk-3.0')),
     (os.path.join(sys.prefix, 'lib', 'gdk-pixbuf-2.0'),
         os.path.join('lib', 'gdk-pixbuf-2.0')),
+    (os.path.join(sys.prefix, 'lib', 'evince'),
+        os.path.join('lib', 'evince')),
     (os.path.join(sys.prefix, 'share', 'locale'),
         os.path.join('share', 'locale')),
     (os.path.join(sys.prefix, 'share', 'icons', 'Adwaita'),
@@ -41,6 +43,8 @@ include_files = [
 
 required_gi_namespaces = [
     'Atk-1.0',
+    'EvinceDocument-3.0',
+    'EvinceView-3.0',
     'GLib-2.0',
     'GModule-2.0',
     'GObject-2.0',

tryton/__init__.py

@@ -11,6 +11,11 @@ try:
     gi.require_version('GtkSpell', '3.0')
 except ValueError:
     pass
+try:
+    gi.require_version('EvinceDocument', '3.0')
+    gi.require_version('EvinceView', '3.0')
+except ValueError:
+    pass
 
 try:
     # Import earlier otherwise there is a segmentation fault on MSYS2

tryton/gui/window/view_form/view/form.py

@@ -13,6 +13,7 @@ from tryton.common.underline import set_underline
 from tryton.common.button import Button
 from tryton.config import CONFIG
 from .form_gtk.calendar_ import Date, Time, DateTime
+from .form_gtk.document import Document
 from .form_gtk.float import Float
 from .form_gtk.integer import Integer
 from .form_gtk.selection import Selection
@@ -167,6 +168,7 @@ class FormXMLViewParser(XMLViewParser):
         'date': Date,
         'datetime': DateTime,
         'dict': DictWidget,
+        'document': Document,
         'email': Email,
         'float': Float,
         'html': HTML,

tryton/gui/window/view_form/view/form_gtk/document.py

@@ -0,0 +1,91 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from pathlib import Path
+from tempfile import NamedTemporaryFile
+
+from gi.repository import Gtk, Gdk, GLib
+try:
+    from gi.repository import EvinceDocument, EvinceView
+    EvinceDocument.init()
+except ImportError:
+    EvinceDocument = EvinceView = None
+
+from tryton.common import data2pixbuf, resize_pixbuf
+
+from .widget import Widget
+from .binary import BinaryMixin
+
+
+class Document(BinaryMixin, Widget):
+    expand = True
+
+    def __init__(self, view, attrs):
+        super().__init__(view, attrs)
+
+        self.widget = Gtk.VBox(spacing=3)
+        self.image = Gtk.DrawingArea()
+        self.widget.pack_start(
+            self.image, expand=True, fill=True, padding=0)
+
+        if EvinceView:
+            self.evince_view = EvinceView.View()
+            self.evince_scroll = Gtk.ScrolledWindow()
+            self.evince_scroll.add(self.evince_view)
+            self.widget.pack_start(
+                self.evince_scroll, expand=True, fill=True, padding=0)
+        else:
+            self.evince_view = self.evince_scroll = None
+
+    def _draw(self, drawing_area, cr, pixbuf):
+        width = drawing_area.get_allocated_width()
+        height = drawing_area.get_allocated_height()
+        pixbuf = resize_pixbuf(pixbuf, width, height)
+        width = (width - pixbuf.get_width()) / 2
+        height = (height - pixbuf.get_height()) / 2
+        Gdk.cairo_set_source_pixbuf(cr, pixbuf, width, height)
+        cr.paint()
+
+    def display(self):
+        super().display()
+        data = self.field.get_data(self.record)
+
+        if not data:
+            self.image.hide()
+            if self.evince_view:
+                self.evince_view.set_model(EvinceView.DocumentModel())
+                self.evince_scroll.hide()
+            return
+
+        pixbuf = data2pixbuf(data)
+        if pixbuf:
+            try:
+                self.image.disconnect_by_func(self._draw)
+            except TypeError:
+                pass
+            self.image.connect('draw', self._draw, pixbuf)
+            self.image.queue_draw()
+            self.image.show()
+            if self.evince_view:
+                self.evince_view.set_model(EvinceView.DocumentModel())
+                self.evince_scroll.hide()
+        else:
+            self.image.hide()
+            if self.evince_view:
+                self.evince_scroll.show()
+                if self.filename_field:
+                    suffix = self.filename_field.get(self.record)
+                else:
+                    suffix = None
+                try:
+                    with NamedTemporaryFile(suffix=suffix) as fp:
+                        fp.write(data)
+                        path = Path(fp.name)
+                        document = (
+                            EvinceDocument.Document.factory_get_document(
+                                path.as_uri()))
+                    model = EvinceView.DocumentModel()
+                    model.set_document(document)
+                    self.evince_view.set_model(model)
+                except GLib.GError:
+                    self.evince_view.set_model(EvinceView.DocumentModel())
+                    self.evince_scroll.hide()