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Draw entry transitions on the state machine - #169
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Bump liquidjava-fsm to 0.2.2, which reports the entryTransitions of a StateRefinement without from beside ones with from: how an object in an unknown state enters the protocol. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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… on hover (#171) Part of #170. ## Why Focus mode dimmed the methods unrelated to a state error but kept their text, so the layout did not move (#158). On a large machine the dimmed label stacks still took the space. In the UDP chat client the state the error is about, `closed`, was below the fold. ## What In focus mode: - **Collapse.** The dimmed methods of each label become a count: `receive` + `+9 more`, or `2 methods`. Overloads count once. A single dimmed method keeps its name and conditions. - **List on hover.** Hovering a count lists its methods, with their conditions, next to the label. A click keeps the list open until the next click, a pan or a zoom. The diagram is not laid out again, so the list appears at once. The list goes right, left, above or below the label, or beside the diagram at the label's height: wherever it covers the fewest states, labels and transition lines, and the closest such place on a tie. - **Constructors.** The constructors of each state are merged into one arrow, e.g. `4 constructors`. - **Layout.** The diagram is laid out again. A tall diagram is shrunk to fit the panel, but never below 60%. - **Bright.** Only the failed method stays bright. - **States.** No state is removed. **Show all** is unchanged. An earlier version of this PR also drew a dashed "way to an expected state": a shortest path along the diagram's transitions. It was dropped. The path ignores the transitions' conditions and the code, and for a state that no call leaves (`closed`) it could only suggest creating a new object. The ways to fix now come from the verifier's hints only (#172). Error categories (liquid-java/liquidjava#418) are not used to choose what to show. #170 explains why. ## Screenshots Real verifier output (0.0.36) in headless VS Code. **UDP chat client** (`E_OSS_A1_22`): `receive` after an `if` that may close the socket. In the screenshots, the three `from = "closed(this) && connected(old(this))"` preconditions are removed from the DatagramSocket spec. With them, verifier 0.0.36 sends no state context or hints for this error, and the view can only say "Invalid method call at line 28". That is a verifier issue, separate from this PR. | Before | After | |---|---| | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/udp-before.png" width="440"> | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/udp-after-v2.png" width="440"> | **On hover**, placed off the states and transitions: `+12 more` next to `bound` goes beside the diagram, `+16 more` next to `connected` to its right, and the `2 methods` of `ImageWriteParam` left of `tilingExplicit` and right of `setTiling`. | UDP, `bound` | UDP, `connected` | |---|---| | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/udp-hover-bound.png" width="440"> | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/udp-hover-connected.png" width="440"> | | ImageWriteParam, bottom | ImageWriteParam, middle | |---|---| | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/iwp-hover-bottom.png" width="440"> | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/iwp-hover-middle.png" width="440"> | **ImageWriteParam**: `setTiling` from `startTiling`. | Before | After | |---|---| | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/iwp-before.png" width="440"> | <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/iwp-after-v2.png" width="440"> | <details><summary>Show all (unchanged)</summary> <img src="https://raw.githubusercontent.com/liquid-java/vscode-liquidjava/pr-screenshots/focus-collapse/udp-show-all.png" width="440"> </details> The collapsed "Ways to fix" section in the screenshots comes from the stacked PR. ## Tests - `npm run test:unit`: 123 passed. New tests cover collapsing, the list on hover, pinning it with a click and closing it on a click, pan or zoom, placing it off the states, labels and lines and inside the panel, merging constructors and the entry transitions from #169, the fit to the panel, and Show all being unchanged. - `tsc -p tsconfig.test.json` and `npm run lint`: clean. - `npm test` (VS Code): 9 + 1 passing, and server `mvn test`: 35 passing, both run on the stacked branch, which includes this one. Rebased on #169. In focus mode, entry transitions are dimmed and merged per state, the same way constructors are. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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Brings liquidjava-fsm#15 to the extension, released as liquidjava-fsm 0.2.2.
The verifier uses the first
@StateRefinementof a method whosefrommatches. A@StateRefinementwithoutfrombeside ones withfromis how an object whose state is unknown (a field, a parameter or a getter's result) enters the protocol. The parser now reports these asentryTransitions, and the diagram draws them as arrows from the initial node, labelled with the method and, when conditions are shown, its postcondition.server/pom.xml: liquidjava-fsm 0.2.1 → 0.2.2StateMachineDTO: passesentryTransitionsto the clientdiagram.ts: draws[*] --> to : methodfor each entry transition, dimmed in focus mode like the constructor arrowsfsm.ts: an entry transition postcondition enables Expand ConditionsThe fsm PR's
EntryTransitionspec, withnew Edit().undo()as the state error.canUndo(return) →endDoneandreset→startnow come out of the initial node:Tests
vitest run110 passed, typecheck cleanmvn test35 passed, against liquidjava-fsm 0.2.2 from Maven Central🤖 Generated with Claude Code