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{"version":3,"file":"history.js","names":["Scope","Module","Quill","History","DEFAULTS","delay","maxStack","userOnly","lastRecorded","ignoreChange","stack","undo","redo","currentRange","constructor","quill","options","on","events","EDITOR_CHANGE","eventName","value","oldValue","source","SELECTION_CHANGE","sources","SILENT","TEXT_CHANGE","USER","record","transform","transformRange","keyboard","addBinding","key","shortKey","bind","shiftKey","test","navigator","platform","root","addEventListener","event","inputType","preventDefault","change","dest","length","item","pop","base","getContents","inverseDelta","delta","invert","push","range","updateContents","restoreSelection","clear","cutoff","changeDelta","oldDelta","ops","undoDelta","undoRange","timestamp","Date","now","compose","shift","transformStack","stackItem","setSelection","index","getLastChangeIndex","scroll","remoteDelta","i","oldItem","splice","endsWithNewlineChange","lastOp","insert","endsWith","attributes","Object","keys","some","attr","query","BLOCK","deleteLength","reduce","op","delete","changeIndex","start","transformPosition","end","default"],"sources":["../../src/modules/history.ts"],"sourcesContent":["import { Scope } from 'parchment';\nimport type Delta from 'quill-delta';\nimport Module from '../core/module.js';\nimport Quill from '../core/quill.js';\nimport type Scroll from '../blots/scroll.js';\nimport type { Range } from '../core/selection.js';\n\nexport interface HistoryOptions {\n userOnly: boolean;\n delay: number;\n maxStack: number;\n}\n\nexport interface StackItem {\n delta: Delta;\n range: Range | null;\n}\n\ninterface Stack {\n undo: StackItem[];\n redo: StackItem[];\n}\n\nclass History extends Module<HistoryOptions> {\n static DEFAULTS: HistoryOptions = {\n delay: 1000,\n maxStack: 100,\n userOnly: false,\n };\n\n lastRecorded = 0;\n ignoreChange = false;\n stack: Stack = { undo: [], redo: [] };\n currentRange: Range | null = null;\n\n constructor(quill: Quill, options: Partial<HistoryOptions>) {\n super(quill, options);\n this.quill.on(\n Quill.events.EDITOR_CHANGE,\n (eventName, value, oldValue, source) => {\n if (eventName === Quill.events.SELECTION_CHANGE) {\n if (value && source !== Quill.sources.SILENT) {\n this.currentRange = value;\n }\n } else if (eventName === Quill.events.TEXT_CHANGE) {\n if (!this.ignoreChange) {\n if (!this.options.userOnly || source === Quill.sources.USER) {\n this.record(value, oldValue);\n } else {\n this.transform(value);\n }\n }\n\n this.currentRange = transformRange(this.currentRange, value);\n }\n },\n );\n\n this.quill.keyboard.addBinding(\n { key: 'z', shortKey: true },\n this.undo.bind(this),\n );\n this.quill.keyboard.addBinding(\n { key: ['z', 'Z'], shortKey: true, shiftKey: true },\n this.redo.bind(this),\n );\n if (/Win/i.test(navigator.platform)) {\n this.quill.keyboard.addBinding(\n { key: 'y', shortKey: true },\n this.redo.bind(this),\n );\n }\n\n this.quill.root.addEventListener('beforeinput', (event) => {\n if (event.inputType === 'historyUndo') {\n this.undo();\n event.preventDefault();\n } else if (event.inputType === 'historyRedo') {\n this.redo();\n event.preventDefault();\n }\n });\n }\n\n change(source: 'undo' | 'redo', dest: 'redo' | 'undo') {\n if (this.stack[source].length === 0) return;\n const item = this.stack[source].pop();\n if (!item) return;\n const base = this.quill.getContents();\n const inverseDelta = item.delta.invert(base);\n this.stack[dest].push({\n delta: inverseDelta,\n range: transformRange(item.range, inverseDelta),\n });\n this.lastRecorded = 0;\n this.ignoreChange = true;\n this.quill.updateContents(item.delta, Quill.sources.USER);\n this.ignoreChange = false;\n\n this.restoreSelection(item);\n }\n\n clear() {\n this.stack = { undo: [], redo: [] };\n }\n\n cutoff() {\n this.lastRecorded = 0;\n }\n\n record(changeDelta: Delta, oldDelta: Delta) {\n if (changeDelta.ops.length === 0) return;\n this.stack.redo = [];\n let undoDelta = changeDelta.invert(oldDelta);\n let undoRange = this.currentRange;\n const timestamp = Date.now();\n if (\n // @ts-expect-error Fix me later\n this.lastRecorded + this.options.delay > timestamp &&\n this.stack.undo.length > 0\n ) {\n const item = this.stack.undo.pop();\n if (item) {\n undoDelta = undoDelta.compose(item.delta);\n undoRange = item.range;\n }\n } else {\n this.lastRecorded = timestamp;\n }\n if (undoDelta.length() === 0) return;\n this.stack.undo.push({ delta: undoDelta, range: undoRange });\n // @ts-expect-error Fix me later\n if (this.stack.undo.length > this.options.maxStack) {\n this.stack.undo.shift();\n }\n }\n\n redo() {\n this.change('redo', 'undo');\n }\n\n transform(delta: Delta) {\n transformStack(this.stack.undo, delta);\n transformStack(this.stack.redo, delta);\n }\n\n undo() {\n this.change('undo', 'redo');\n }\n\n protected restoreSelection(stackItem: StackItem) {\n if (stackItem.range) {\n this.quill.setSelection(stackItem.range, Quill.sources.USER);\n } else {\n const index = getLastChangeIndex(this.quill.scroll, stackItem.delta);\n this.quill.setSelection(index, Quill.sources.USER);\n }\n }\n}\n\nfunction transformStack(stack: StackItem[], delta: Delta) {\n let remoteDelta = delta;\n for (let i = stack.length - 1; i >= 0; i -= 1) {\n const oldItem = stack[i];\n stack[i] = {\n delta: remoteDelta.transform(oldItem.delta, true),\n range: oldItem.range && transformRange(oldItem.range, remoteDelta),\n };\n remoteDelta = oldItem.delta.transform(remoteDelta);\n if (stack[i].delta.length() === 0) {\n stack.splice(i, 1);\n }\n }\n}\n\nfunction endsWithNewlineChange(scroll: Scroll, delta: Delta) {\n const lastOp = delta.ops[delta.ops.length - 1];\n if (lastOp == null) return false;\n if (lastOp.insert != null) {\n return typeof lastOp.insert === 'string' && lastOp.insert.endsWith('\\n');\n }\n if (lastOp.attributes != null) {\n return Object.keys(lastOp.attributes).some((attr) => {\n return scroll.query(attr, Scope.BLOCK) != null;\n });\n }\n return false;\n}\n\nfunction getLastChangeIndex(scroll: Scroll, delta: Delta) {\n const deleteLength = delta.reduce((length, op) => {\n return length + (op.delete || 0);\n }, 0);\n let changeIndex = delta.length() - deleteLength;\n if (endsWithNewlineChange(scroll, delta)) {\n changeIndex -= 1;\n }\n return changeIndex;\n}\n\nfunction transformRange(range: Range | null, delta: Delta) {\n if (!range) return range;\n const start = delta.transformPosition(range.index);\n const end = delta.transformPosition(range.index + range.length);\n return { index: start, length: end - start };\n}\n\nexport { History as default, getLastChangeIndex 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