[REM] extensions: remove the 'switcher' extension

The 'sphinx-tabs' extension is better in every aspect:
- Synchronize selected tabs (group tabs feature).
- No need for extra `code-block` directive (code tabs feature).
- Better looking.
- No custom Python, JS, or CSS.

task-2787415

Part-of: odoo/documentation#1688

conf.py

@@ -117,9 +117,6 @@ extensions = [
     # Redirection generator
     'redirects',
 
-    # Code switcher (switcher and case directives)
-    'switcher',
-
     # Content tabs
     'sphinx_tabs.tabs',
 

extensions/odoo_theme/static/style.scss

@@ -512,25 +512,6 @@ header.o_main_header {
                   max-width: 100%;
                 }
 
-                .content-switcher {
-                    .nav-tabs .nav-link.active {
-                        background-color: #f8f8f8;
-                        border-color: #dee2e6 #dee2e6 #f8f8f8;
-                        font-weight: $fw_semibold;
-                    }
-
-                    .tab-content {
-                        background: $doc_code-bg;
-                        border: 1px $gray-300 solid;
-                        border-top: 0;
-
-                        div[class^="highlight"] {
-                            border: 0;
-                            margin: 0;
-                        }
-                    }
-                }
-
                 @include media-breakpoint-up(xl) {
                     width: 100%;
                     padding-right: 0;

extensions/switcher/__init__.py

@@ -1,65 +0,0 @@
-import os.path
-
-from docutils import nodes
-from docutils.parsers.rst import Directive
-
-from pygments.lexers import get_lexer_by_name
-
-
-def setup(app):
-    app.add_directive('switcher', SwitcherDirective)
-    app.add_directive('case', CaseDirective)
-
-    app.connect('env-updated', add_statics)
-
-    return {
-        'parallel_read_safe': True,
-        'parallel_write_safe': True
-    }
-
-def add_statics(app, env):
-    app.add_js_file('js/switcher.js')
-    env.config.html_static_path.append(statics())
-
-
-statics = lambda *p: os.path.join(
-    os.path.abspath(os.path.dirname(__file__)),
-    'static', *p)
-
-
-class SwitcherDirective(Directive):
-    has_content = True
-
-    def run(self):
-        self.assert_has_content()
-
-        body = nodes.compound('\n'.join(self.content), classes=['tab-content'])
-        self.state.nested_parse(self.content, self.content_offset, body)
-
-        titles = []
-        for child in body.children:
-            if isinstance(child, nodes.literal_block):
-                titles.append(get_lexer_by_name(child['language']).name)
-            else:
-                assert child['names'], (
-                    "A switcher case must be either a code block or a compound with a name"
-                )
-                titles.append(' '.join(child['names']))
-        tabs = nodes.bullet_list('', *[
-            nodes.list_item('', nodes.Text(title), classes=['nav-link'])
-            for title in titles
-        ], classes=['nav nav-tabs'] )
-        node = nodes.compound('', tabs, body, classes=['content-switcher'])
-        return [node]
-
-
-class CaseDirective(Directive):
-    required_arguments = 1
-    final_argument_whitespace = True
-    has_content = True
-
-    def run(self):
-        self.assert_has_content()
-        node = nodes.compound('\n'.join(self.content), names=[self.arguments[0]])
-        self.state.nested_parse(self.content, self.content_offset, node)
-        return [node]

extensions/switcher/static/js/switcher.js

@@ -1,36 +0,0 @@
-(function ($) {
-
-    // TODO EDI custom css for content-switcher logic
-    // can be placed as css inside the extension ideally
-    document.addEventListener('DOMContentLoaded', function () {
-        document.querySelectorAll('.content-switcher').forEach(switcher => {
-            const links = switcher.querySelectorAll('ul li');
-            const linksArray = Array.from(links);
-            const tabs = switcher.querySelectorAll('.tab-content > div');
-
-            tabs.forEach(tab => {
-                tab.classList.add('tab-pane');
-            });
-
-            function select(index) {
-                links.forEach(link => {
-                    link.classList.remove('active');
-                });
-                tabs.forEach(tab => {
-                    tab.classList.remove('active');
-                });
-                links[index].classList.add('active');
-                tabs[index].classList.add('active');
-            }
-
-            select(0);
-            links.forEach(link => {
-                link.addEventListener('click', ev => {
-                    // const clickedLink = ev.target.closest('ul li');
-                    select(linksArray.indexOf(link));
-                });
-            });
-        });
-    });
-
-})();