Mercurial
diff .cms/lib/codemirror/src/model/line_widget.js @ 0:78edf6b517a0 draft
24.10
author | Coffee CMS <info@coffee-cms.ru> |
---|---|
date | Fri, 11 Oct 2024 22:40:23 +0000 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/src/model/line_widget.js Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,78 @@ +import { runInOp } from "../display/operations.js" +import { addToScrollTop } from "../display/scrolling.js" +import { regLineChange } from "../display/view_tracking.js" +import { heightAtLine, lineIsHidden } from "../line/spans.js" +import { lineNo, updateLineHeight } from "../line/utils_line.js" +import { widgetHeight } from "../measurement/widgets.js" +import { changeLine } from "./changes.js" +import { eventMixin } from "../util/event.js" +import { signalLater } from "../util/operation_group.js" + +// Line widgets are block elements displayed above or below a line. + +export class LineWidget { + constructor(doc, node, options) { + if (options) for (let opt in options) if (options.hasOwnProperty(opt)) + this[opt] = options[opt] + this.doc = doc + this.node = node + } + + clear() { + let cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line) + if (no == null || !ws) return + for (let i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1) + if (!ws.length) line.widgets = null + let height = widgetHeight(this) + updateLineHeight(line, Math.max(0, line.height - height)) + if (cm) { + runInOp(cm, () => { + adjustScrollWhenAboveVisible(cm, line, -height) + regLineChange(cm, no, "widget") + }) + signalLater(cm, "lineWidgetCleared", cm, this, no) + } + } + + changed() { + let oldH = this.height, cm = this.doc.cm, line = this.line + this.height = null + let diff = widgetHeight(this) - oldH + if (!diff) return + if (!lineIsHidden(this.doc, line)) updateLineHeight(line, line.height + diff) + if (cm) { + runInOp(cm, () => { + cm.curOp.forceUpdate = true + adjustScrollWhenAboveVisible(cm, line, diff) + signalLater(cm, "lineWidgetChanged", cm, this, lineNo(line)) + }) + } + } +} +eventMixin(LineWidget) + +function adjustScrollWhenAboveVisible(cm, line, diff) { + if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop)) + addToScrollTop(cm, diff) +} + +export function addLineWidget(doc, handle, node, options) { + let widget = new LineWidget(doc, node, options) + let cm = doc.cm + if (cm && widget.noHScroll) cm.display.alignWidgets = true + changeLine(doc, handle, "widget", line => { + let widgets = line.widgets || (line.widgets = []) + if (widget.insertAt == null) widgets.push(widget) + else widgets.splice(Math.min(widgets.length, Math.max(0, widget.insertAt)), 0, widget) + widget.line = line + if (cm && !lineIsHidden(doc, line)) { + let aboveVisible = heightAtLine(line) < doc.scrollTop + updateLineHeight(line, line.height + widgetHeight(widget)) + if (aboveVisible) addToScrollTop(cm, widget.height) + cm.curOp.forceUpdate = true + } + return true + }) + if (cm) signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle)) + return widget +}