Match login template with changes from .com (#11101)

Is it okay to change the template on .org? Or maybe just override the template on .com?
I'm changing the template here because we already do something similar
with the signup template.

Author: stsewd

readthedocs/templates/account/login.html

@@ -11,29 +11,68 @@
 
 <h1>{% trans "Sign In" %}</h1>
 
-<p><small>{% blocktrans trimmed %}If you have not created an account yet, then please
-<a href="{{ signup_url }}">sign up</a> first.{% endblocktrans %}</small></p>
-
-<form class="login" method="POST" action="{% url "account_login" %}">
-  {% csrf_token %}
-  {{ form.as_p }}
-  {% if redirect_field_value %}
-  <input type="hidden" name="{{ redirect_field_name }}" value="{{ redirect_field_value }}" />
+{% if is_from_cas_login %}
+<p>
+  {% blocktrans %}
+    In order to view this documentation, you must log in first.
+  {% endblocktrans %}
+</p>
+{% endif %}
+
+{% if allowed_providers %}
+  {# If allowed providers is given, don't show the username/password form #}
+  <div class="clearfix">
+    <ul class="socialaccount_providers">
+      {% include "socialaccount/snippets/provider_list.html" with process="login" next=request.GET.next verbiage="Sign in with" %}
+    </ul>
+  </div>
+
+  {% if project_password_url %}
+  <h3>{% trans 'Or' %}</h3>
+  <p>
+      {% blocktrans trimmed with project_password_url=project_password_url %}
+      Do you have a password to access this documentation?
+      <a href="{{ project_password_url }}">Access here</a>.
+      {% endblocktrans %}
+  </p>
   {% endif %}
-  <button class="primaryAction" type="submit">{% trans "Sign In" %}</button>
 
-  {% url 'account_reset_password' as password_reset_url %}
+{% else %}
+
+  <p><small>{% blocktrans trimmed %}If you have not created an account yet, then please
+  <a href="{{ signup_url }}">sign up</a> first.{% endblocktrans %}</small></p>
+
+  <form class="login" method="POST" action="{% url "account_login" %}">
+    {% csrf_token %}
+    {{ form.as_p }}
+    {% if redirect_field_value %}
+    <input type="hidden" name="{{ redirect_field_name }}" value="{{ redirect_field_value }}" />
+    {% endif %}
+    <button class="primaryAction" type="submit">{% trans "Sign In" %}</button>
+
+    {% url 'account_reset_password' as password_reset_url %}
+    <p>
+      <small>{% blocktrans trimmed %}If you forgot your password, <a href="{{ password_reset_url }}">reset it.</a>{% endblocktrans %}</small>
+    </p>
+  </form>
+
+  {% if project_password_url %}
+  <h3>{% trans 'Or' %}</h3>
   <p>
-    <small>{% blocktrans trimmed %}If you forgot your password, <a href="{{ password_reset_url }}">reset it.</a>{% endblocktrans %}</small>
+      {% blocktrans trimmed with project_password_url=project_password_url %}
+      Do you have a password to access this documentation?
+      <a href="{{ project_password_url }}">Access here</a>.
+      {% endblocktrans %}
   </p>
-</form>
+  {% endif %}
 
-<h3>{% trans 'Or' %}</h3>
+  <h3>{% trans 'Or' %}</h3>
 
-<div class="clearfix">
-  <ul class="socialaccount_providers">
-    {% include "socialaccount/snippets/provider_list.html" with process="login" next=request.GET.next verbiage="Sign in with" %}
-  </ul>
-</div>
+  <div class="clearfix">
+    <ul class="socialaccount_providers">
+      {% include "socialaccount/snippets/provider_list.html" with process="login" next=request.GET.next verbiage="Sign in with" %}
+    </ul>
+  </div>
+{% endif %}
 
 {% endblock content %}