79 lines
2.8 KiB
JavaScript
79 lines
2.8 KiB
JavaScript
|
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 - 1, 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
|
||
|
|
}
|