Restructure templates to idiomatic Jinja

[TimDumol]

By idiomatic Jinja, I mean

• Inheritance instead of inclusion

• Arguments required are only the needed models to produce the required view [1]

This will make editing the templates easier, and will allow for a more consistent interface (by specifying base templates for each section).

[1] Model-View-Controller

CC: @qed777 @williamstein

Component: notebook

Author: Tim Dumol, Mitesh Patel

Reviewer: Mitesh Patel

Merged: sagenb-0.6

Issue created by migration from https://trac.sagemath.org/ticket/7786

[TimDumol]

Attachment: trac_7783-sage-scripts.patch.gz

Preliminary work. Worksheet pages not yet done.

[TimDumol]

Attachment: trac_7786-template-jinja-idiomatic.patch.gz

Converts template structure to an inheritance based tree. Apply this patch alone to sagenb repo.

[TimDumol]

comment:1

This is a big patch that makes the template structure more consistent by using inheritance. It also removes a lot of non-semantic markup (
,

---

, etc.). Please note that there are some visual changes (font stack, bar below banner at login.html, headers instead of bold tags at login.html, etc.). I hope they're not too major. Kindly note any changes that are too big and may require consultation at the mailing list.

[TimDumol]

comment:2

Note: Depends on #7269, #7650, and dependencies.

[qed777]

Author: Tim Dumol

[qed777]

comment:3

I can only look at the patch right now, but I think these are much-needed and appreciated changes to SageNB. I think we should make merging this ticket (plus its dependencies) a priority. I'll try to start reviewing the patch soon.

As the merge nears, I'll rebase #7666 and its descendants, as necessary.

[TimDumol]

Attachment: trac_7786-template-jinja-idiomatic.2.patch.gz

Rebased on #7650 and its dependencies. Apply this patch alone to sagenb repo.

[TimDumol]

Rebased on #7650 and its dependencies. Apply this patch alone to sagenb repo.

[TimDumol]

Attachment: trac_7786-template-jinja-idiomatic.2,patch.gz

Attachment: trac_7786-template-jinja-idiomatic.3.patch.gz

Updates source_code.html and adds styling for it. Also adds a warning to the .css files.