[PATCH] Workflow graph visualization macro

[psuter <petsuter@…>]

I propose adding a macro to render workflow graphs, similar to the two illustrations on the TracWorkflow page (which could be replaced by this macro).

For example [[Workflow(fix = open -> closed; reopen = closed -> open)]] would expand to this figure:

Most often this would be used in MacroProcessor mode, e.g. to paste the definition from Trac's basic-workflow.ini:

    {{{
    #!Workflow
    leave = * -> *
    leave.operations = leave_status
    leave.default = 1

    accept = new,assigned,accepted,reopened -> accepted
    accept.permissions = TICKET_MODIFY
    accept.operations = set_owner_to_self

    resolve = new,assigned,accepted,reopened -> closed
    resolve.permissions = TICKET_MODIFY
    resolve.operations = set_resolution

    reassign = new,assigned,accepted,reopened -> assigned
    reassign.permissions = TICKET_MODIFY
    reassign.operations = set_owner

    reopen = closed -> reopened
    reopen.permissions = TICKET_CREATE
    reopen.operations = del_resolution
    }}}

This would expand to:

[psuter <petsuter@…>]

Trac basic-workflow.ini example rendering

[psuter <petsuter@…>]

Example rendering of [[Workflow(fix = open -> closed; reopen = closed -> open)]]

[psuter <petsuter@…>]

WorkflowMacro implementation using client-side javascript / canvas rendering

[psuter <petsuter@…>]

Trac basic-workflow.ini example rendering