From 96d3fa4e01bf8afc35dbf0b7301ce75c6bf3a5c7 Mon Sep 17 00:00:00 2001
From: Romain Derie <rde@odoo.com>
Date: Tue, 4 Feb 2020 18:17:45 +0000
Subject: [IMP] base, website: add ir.ui.view action to compare arch (wizard)
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This commit adds the possibility to compare a view arch to another one.
The result will be shown in a diff viewer (github like).

This is following what was done at #32009

task-2190072

closes odoo/odoo#44646

Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>
---
 odoo/tools/misc.py | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'odoo/tools/misc.py')

diff --git a/odoo/tools/misc.py b/odoo/tools/misc.py
index 534493afa95..b19e3b44923 100644
--- a/odoo/tools/misc.py
+++ b/odoo/tools/misc.py
@@ -29,6 +29,7 @@ import unicodedata
 import werkzeug.utils
 import zipfile
 from collections import defaultdict, Iterable, Mapping, MutableMapping, MutableSet, OrderedDict
+from difflib import HtmlDiff
 from itertools import islice, groupby as itergroupby, repeat
 from lxml import etree
 
@@ -1470,3 +1471,48 @@ class DotDict(dict):
     def __getattr__(self, attrib):
         val = self.get(attrib)
         return DotDict(val) if type(val) is dict else val
+
+
+def get_diff(data_from, data_to, custom_style=False):
+    """
+    Return, in an HTML table, the diff between two texts.
+
+    :param tuple data_from: tuple(text, name), name will be used as table header
+    :param tuple data_to: tuple(text, name), name will be used as table header
+    :param tuple custom_style: string, style css including <style> tag.
+    :return: a string containing the diff in an HTML table format.
+    """
+    def handle_style(html_diff, custom_style):
+        """ The HtmlDiff lib will add some usefull classes on the DOM to
+        identify elements. Simply append to those classes some BS4 ones.
+        For the table to fit the modal width, some custom style is needed.
+        """
+        to_append = {
+            'diff_header': 'bg-600 text-center align-top px-2',
+            'diff_next': 'd-none',
+            'diff_add': 'bg-success',
+            'diff_chg': 'bg-warning',
+            'diff_sub': 'bg-danger',
+        }
+        for old, new in to_append.items():
+            html_diff = html_diff.replace(old, "%s %s" % (old, new))
+        html_diff = html_diff.replace('nowrap', '')
+        html_diff += custom_style or '''
+            <style>
+                table.diff { width: 100%; }
+                table.diff th.diff_header { width: 50%; }
+                table.diff td.diff_header { white-space: nowrap; }
+                table.diff td { word-break: break-all; }
+            </style>
+        '''
+        return html_diff
+
+    diff = HtmlDiff(tabsize=2).make_table(
+        data_from[0].splitlines(),
+        data_to[0].splitlines(),
+        data_from[1],
+        data_to[1],
+        context=True,  # Show only diff lines, not all the code
+        numlines=3,
+    )
+    return handle_style(diff, custom_style)
-- 
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