From b43132e292e6efac11fa3cb6232e4ccee85583c0 Mon Sep 17 00:00:00 2001
From: Étienne Loks <etienne.loks@iggdrasil.net>
Date: Tue, 9 Jul 2019 19:02:09 +0200
Subject: Graph generation: manage link - display raw SVG - scale SVG - manage
 reopening in a specific tab

---
 ishtar_common/utils.py | 46 ++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 38 insertions(+), 8 deletions(-)

(limited to 'ishtar_common/utils.py')

diff --git a/ishtar_common/utils.py b/ishtar_common/utils.py
index eb8414ced..43603b2e1 100644
--- a/ishtar_common/utils.py
+++ b/ishtar_common/utils.py
@@ -36,6 +36,7 @@ import six
 import subprocess
 import sys
 import tempfile
+import xmltodict
 import zipfile
 
 from django import forms
@@ -1224,15 +1225,22 @@ def generate_relation_graph(obj, highlight_current=True,
     above_relations, equal_relations, styles = get_relations_for_graph(
         rel_model, obj.pk, render_above=render_above,
         render_bellow=render_bellow, full=full)
-    if not above_relations and not equal_relations:
-        obj.relation_image = None
-        obj.save()
-        return
 
     # generate dotfile
     dot_str = "digraph relations {\nnode [shape=box];\n"
     rel_str = ""
     described = []
+    if not above_relations and not equal_relations:
+        rel_str += "subgraph NoDir {\nedge [dir=none,style=dashed];\n"
+        style = 'label="{}"'.format(obj.relation_label)
+        if highlight_current:
+            style += ',style=filled,fillcolor="#C6C0C0"'
+        dot_str += u'item{}[{},href="{}"];\n'.format(
+            obj.pk, style,
+            reverse('display-item',
+                    args=[model.SLUG, obj.pk])
+        )
+        rel_str += "}\n"
     for list, directed in ((above_relations, True),
                            (equal_relations, False)):
         if directed:
@@ -1246,14 +1254,20 @@ def generate_relation_graph(obj, highlight_current=True,
                 style = 'label="{}"'.format(left.relation_label)
                 if left.pk == obj.pk and highlight_current:
                     style += ',style=filled,fillcolor="#C6C0C0"'
-                dot_str += u'item{}[{}];\n'.format(left.pk, style)
+                dot_str += u'item{}[{},href="{}"];\n'.format(
+                    left.pk, style,
+                    reverse('display-item', args=[model.SLUG, left.pk])
+                )
             if right_pk not in described:
                 described.append(right_pk)
                 right = model.objects.get(pk=right_pk)
                 style = 'label="{}"'.format(right.relation_label)
                 if right.pk == obj.pk and highlight_current:
                     style += ',style=filled,fillcolor="#C6C0C0"'
-                dot_str += u'item{}[{}];\n'.format(right.pk, style)
+                dot_str += u'item{}[{},href="{}"];\n'.format(
+                    right.pk, style,
+                    reverse('display-item', args=[model.SLUG, right.pk])
+                )
             if not directed:  # on the same level
                 rel_str += u"{{rank = same; item{}; item{};}}\n".format(
                     left_pk, right_pk)
@@ -1270,9 +1284,9 @@ def generate_relation_graph(obj, highlight_current=True,
         dot_file.write(dot_str)
 
     if not render_above:
-        suffix = "_above"
-    elif not render_bellow:
         suffix = "_bellow"
+    elif not render_bellow:
+        suffix = "_above"
     else:
         suffix = ""
 
@@ -1293,6 +1307,22 @@ def generate_relation_graph(obj, highlight_current=True,
     with open(svg_tmp_name, "w") as svg_file:
         popen = subprocess.Popen(args, stdout=svg_file)
         popen.wait()
+
+    # scale image if necessary
+    with open(svg_tmp_name, "r") as svg_file:
+        doc = xmltodict.parse(svg_file.read())
+        width = doc["svg"]["@width"]
+        if width.endswith("pt"):
+            width = float(width[:-2])
+            if width > 600:
+                doc["svg"].pop("@height")
+                doc["svg"].pop("@width")
+
+        doc["svg"]["@preserveAspectRatio"] = "xMinYMin meet"
+
+    with open(svg_tmp_name, "w") as svg_file:
+        svg_file.write(xmltodict.unparse(doc))
+
     with open(svg_tmp_name, "r") as svg_file:
         django_file = File(svg_file)
         attr = "relation_image" + suffix
-- 
cgit v1.2.3