Mercurial
diff .cms/lib/codemirror/src/util/operation_group.js @ 0:78edf6b517a0 draft
24.10
author | Coffee CMS <info@coffee-cms.ru> |
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date | Fri, 11 Oct 2024 22:40:23 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/src/util/operation_group.js Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,72 @@ +import { getHandlers } from "./event.js" + +let operationGroup = null + +export function pushOperation(op) { + if (operationGroup) { + operationGroup.ops.push(op) + } else { + op.ownsGroup = operationGroup = { + ops: [op], + delayedCallbacks: [] + } + } +} + +function fireCallbacksForOps(group) { + // Calls delayed callbacks and cursorActivity handlers until no + // new ones appear + let callbacks = group.delayedCallbacks, i = 0 + do { + for (; i < callbacks.length; i++) + callbacks[i].call(null) + for (let j = 0; j < group.ops.length; j++) { + let op = group.ops[j] + if (op.cursorActivityHandlers) + while (op.cursorActivityCalled < op.cursorActivityHandlers.length) + op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm) + } + } while (i < callbacks.length) +} + +export function finishOperation(op, endCb) { + let group = op.ownsGroup + if (!group) return + + try { fireCallbacksForOps(group) } + finally { + operationGroup = null + endCb(group) + } +} + +let orphanDelayedCallbacks = null + +// Often, we want to signal events at a point where we are in the +// middle of some work, but don't want the handler to start calling +// other methods on the editor, which might be in an inconsistent +// state or simply not expect any other events to happen. +// signalLater looks whether there are any handlers, and schedules +// them to be executed when the last operation ends, or, if no +// operation is active, when a timeout fires. +export function signalLater(emitter, type /*, values...*/) { + let arr = getHandlers(emitter, type) + if (!arr.length) return + let args = Array.prototype.slice.call(arguments, 2), list + if (operationGroup) { + list = operationGroup.delayedCallbacks + } else if (orphanDelayedCallbacks) { + list = orphanDelayedCallbacks + } else { + list = orphanDelayedCallbacks = [] + setTimeout(fireOrphanDelayed, 0) + } + for (let i = 0; i < arr.length; ++i) + list.push(() => arr[i].apply(null, args)) +} + +function fireOrphanDelayed() { + let delayed = orphanDelayedCallbacks + orphanDelayedCallbacks = null + for (let i = 0; i < delayed.length; ++i) delayed[i]() +}