| 1 | {"version":3,"file":"cursor.js","names":["EmbedBlot","Scope","TextBlot","Cursor","blotName","className","tagName","CONTENTS","value","undefined","constructor","scroll","domNode","selection","textNode","document","createTextNode","appendChild","savedLength","detach","parent","removeChild","format","name","target","index","statics","scope","BLOCK_BLOT","offset","length","optimize","formatAt","node","position","data","remove","restore","composing","range","getNativeRange","lastChild","parentNode","insertBefore","prevTextBlot","prev","prevTextLength","nextTextBlot","next","nextText","text","newText","split","join","mergedTextBlot","insertAt","newTextNode","create","remapOffset","start","end","startNode","startOffset","endNode","endOffset","update","mutations","context","some","mutation","type","isolate","unwrap"],"sources":["../../src/blots/cursor.ts"],"sourcesContent":["import { EmbedBlot, Scope } from 'parchment';\nimport type { Parent, ScrollBlot } from 'parchment';\nimport type Selection from '../core/selection.js';\nimport TextBlot from './text.js';\nimport type { EmbedContextRange } from './embed.js';\n\nclass Cursor extends EmbedBlot {\n static blotName = 'cursor';\n static className = 'ql-cursor';\n static tagName = 'span';\n static CONTENTS = '\\uFEFF'; // Zero width no break space\n\n static value() {\n return undefined;\n }\n\n selection: Selection;\n textNode: Text;\n savedLength: number;\n\n constructor(scroll: ScrollBlot, domNode: HTMLElement, selection: Selection) {\n super(scroll, domNode);\n this.selection = selection;\n this.textNode = document.createTextNode(Cursor.CONTENTS);\n this.domNode.appendChild(this.textNode);\n this.savedLength = 0;\n }\n\n detach() {\n // super.detach() will also clear domNode.__blot\n if (this.parent != null) this.parent.removeChild(this);\n }\n\n format(name: string, value: unknown) {\n if (this.savedLength !== 0) {\n super.format(name, value);\n return;\n }\n // TODO: Fix this next time the file is edited.\n // eslint-disable-next-line @typescript-eslint/no-this-alias\n let target: Parent | this = this;\n let index = 0;\n while (target != null && target.statics.scope !== Scope.BLOCK_BLOT) {\n index += target.offset(target.parent);\n target = target.parent;\n }\n if (target != null) {\n this.savedLength = Cursor.CONTENTS.length;\n // @ts-expect-error TODO: allow empty context in Parchment\n target.optimize();\n target.formatAt(index, Cursor.CONTENTS.length, name, value);\n this.savedLength = 0;\n }\n }\n\n index(node: Node, offset: number) {\n if (node === this.textNode) return 0;\n return super.index(node, offset);\n }\n\n length() {\n return this.savedLength;\n }\n\n position(): [Text, number] {\n return [this.textNode, this.textNode.data.length];\n }\n\n remove() {\n super.remove();\n // @ts-expect-error Fix me later\n this.parent = null;\n }\n\n restore(): EmbedContextRange | null {\n if (this.selection.composing || this.parent == null) return null;\n const range = this.selection.getNativeRange();\n // Browser may push down styles/nodes inside the cursor blot.\n // https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html#push-down-values\n while (\n this.domNode.lastChild != null &&\n this.domNode.lastChild !== this.textNode\n ) {\n // @ts-expect-error Fix me later\n this.domNode.parentNode.insertBefore(\n this.domNode.lastChild,\n this.domNode,\n );\n }\n\n const prevTextBlot = this.prev instanceof TextBlot ? this.prev : null;\n const prevTextLength = prevTextBlot ? prevTextBlot.length() : 0;\n const nextTextBlot = this.next instanceof TextBlot ? this.next : null;\n // @ts-expect-error TODO: make TextBlot.text public\n const nextText = nextTextBlot ? nextTextBlot.text : '';\n const { textNode } = this;\n // take text from inside this blot and reset it\n const newText = textNode.data.split(Cursor.CONTENTS).join('');\n textNode.data = Cursor.CONTENTS;\n\n // proactively merge TextBlots around cursor so that optimization\n // doesn't lose the cursor. the reason we are here in cursor.restore\n // could be that the user clicked in prevTextBlot or nextTextBlot, or\n // the user typed something.\n let mergedTextBlot;\n if (prevTextBlot) {\n mergedTextBlot = prevTextBlot;\n if (newText || nextTextBlot) {\n prevTextBlot.insertAt(prevTextBlot.length(), newText + nextText);\n if (nextTextBlot) {\n nextTextBlot.remove();\n }\n }\n } else if (nextTextBlot) {\n mergedTextBlot = nextTextBlot;\n nextTextBlot.insertAt(0, newText);\n } else {\n const newTextNode = document.createTextNode(newText);\n mergedTextBlot = this.scroll.create(newTextNode);\n this.parent.insertBefore(mergedTextBlot, this);\n }\n\n this.remove();\n if (range) {\n // calculate selection to restore\n const remapOffset = (node: Node, offset: number) => {\n if (prevTextBlot && node === prevTextBlot.domNode) {\n return offset;\n }\n if (node === textNode) {\n return prevTextLength + offset - 1;\n }\n if (nextTextBlot && node === nextTextBlot.domNode) {\n return prevTextLength + newText.length + offset;\n }\n return null;\n };\n\n const start = remapOffset(range.start.node, range.start.offset);\n const end = remapOffset(range.end.node, range.end.offset);\n if (start !== null && end !== null) {\n return {\n startNode: mergedTextBlot.domNode,\n startOffset: start,\n endNode: mergedTextBlot.domNode,\n endOffset: end,\n };\n }\n }\n return null;\n }\n\n update(mutations: MutationRecord[], context: Record<string, unknown>) {\n if (\n mutations.some((mutation) => {\n return (\n mutation.type === 'characterData' && mutation.target === this.textNode\n );\n })\n ) {\n const range = this.restore();\n if (range) context.range = range;\n }\n }\n\n // Avoid .ql-cursor being a descendant of `<a/>`.\n // The reason is Safari pushes down `<a/>` on text insertion.\n // That will cause DOM nodes not sync with the model.\n //\n // For example ({I} is the caret), given the markup:\n // <a><span class=\"ql-cursor\">\\uFEFF{I}</span></a>\n // When typing a char \"x\", `<a/>` will be pushed down inside the `<span>` first:\n // <span class=\"ql-cursor\"><a>\\uFEFF{I}</a></span>\n // And then \"x\" will be inserted after `<a/>`:\n // <span class=\"ql-cursor\"><a>\\uFEFF</a>d{I}</span>\n optimize(context?: unknown) {\n // @ts-expect-error Fix me later\n super.optimize(context);\n\n let { parent } = this;\n while (parent) {\n if (parent.domNode.tagName === 'A') {\n this.savedLength = Cursor.CONTENTS.length;\n // @ts-expect-error TODO: make isolate generic\n parent.isolate(this.offset(parent), this.length()).unwrap();\n this.savedLength = 0;\n break;\n }\n parent = parent.parent;\n }\n }\n\n value() {\n return '';\n }\n}\n\nexport default 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