What a tab shows, through the link (features) and ⋮ «Optionen» - #41

P34 C: what an IDE tab shows, set by the link and switchable in ⋮ «Optionen».

Installs glpython-editor v0.1.30 (#56: a switch of its own for ▶).

What it does

1. The embed's vocabulary: run (▶), tests, visualize, repl (the console's >>> line), export («→-Kette kopieren» in the visualizer), coverage, listtree and tree (the visualizer's mode «Baum»). Other names (ide, reset, unknown ones) are ignored.
2. In the link: an optional "features": [...] in the payload, next to openFile and files. It works in ?p= and in the old ?project=.
   • Without a project: a plain ?features=run,repl (or #features=) on the address sets the tab too. A link's own features win.
3. Starting state, not a lock:
   • Switches: ⋮ → Optionen opens a dialog with a switch for each part, in German and English.
   • Keeping: the tab keeps its settings across a reload.
   • «Teilen» writes the tab's current settings. A tab that never had settings writes none, so its links stay as they were.
4. The REPL line off: the console stays, and input() still asks in its line when a program runs.
5. Without settings: exactly as today.

The defaults (no settings)

So the IDE differs from the embed only in coverage. To hide the export from learners, a link leaves out export.

The field

{ "v": 2, "name": "…", "mainFile": "auswerter.py", "openFile": "aufgabe.md",
  "features": ["run", "repl", "visualize", "tests", "coverage", "listtree", "tree"],
  "files": { … } }

• Shape: an array of strings, in any order.
• Unknown names are dropped.
• An empty array means every part is off.
• Leaving the field out means the defaults.

Checks (test:browser, all 26 pass)

New cases:

• Without repl (run, tests, visualize, ide):
  • the top bar has ▶, Tests and Visualisieren, and there's no REPL line;
  • a program with input() asks in the console, and the answer runs through;
  • ⋮ Optionen shows the link's settings (ide dropped); switching «Eingabezeile» on brings the REPL line back;
  • after a reload it's still there, and «Teilen» writes ["run", "tests", "visualize", "repl"].
• listtree and tree: a list value in the REPL gets «Baum», the visualizer offers «Kasten / Ersetzung / Baum», and the variables panel draws the tree.
• ▶ without Tests, Tests without ▶: only that button shows, and Tests runs.
• Without features: old ?project= and new ?p= both show the three buttons and the REPL line. Optionen shows the defaults, and «Teilen» writes no features.
• ?features=run,visualize without a project: those two buttons, no REPL line.

The embed side (the block's features= into the link) is glpython-liascript#35, checked there.

Screenshots

• ⋮ → Optionen;
• a project without the REPL line, with the program's own input() prompt as the console's only input line;
• desktop and iPad portrait.

Going live

1. This PR (on v0.1.30): merging deploys the IDE.
2. The macro PR: merge it with the Etappe 4 release bump. Before the IDE is deployed, the old IDE ignores features (unknown fields don't break a link), so the order is only about when the parts show up.

Manual tests

Desktop (Chrome, Safari, Firefox):

1. A link with features without repl: no >>> line.
2. ▶ a program with input(): it asks in the console.
3. ⋮ → Optionen: «Eingabezeile» on, the line is back.
4. Reload: still on.
5. «Teilen», then open the link in a new tab: the same parts.
6. A link with listtree,tree: «Baum» in the visualizer, and «Baum» on a list value in the REPL.
7. An old hand-in link: everything as before.

iPad (Safari, external keyboard):

1. ⋮ → Optionen with Tab and Enter.
2. In the dialog: Tab moves through the switches, Space toggles, Esc closes and the focus returns to ⋮.
3. Portrait: the dialog fits, and the console's program line takes the input.

Follow-ups (not done)

• Nothing on screen says that a part was switched off by the link. A learner who misses the REPL line finds it under ⋮ → Optionen.
• resetOutput (the workspace's own Reset) stays off in the IDE: ⋮ «Python neu starten» does that job. It isn't in the vocabulary.
• The ZIP doesn't keep the settings yet. A downloaded and reopened project starts with the defaults.

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