| Current File : //usr/share/nodejs/codemirror/src/model/mark_text.js |
import { eltP } from "../util/dom.js"
import { eventMixin, hasHandler, on } from "../util/event.js"
import { endOperation, operation, runInOp, startOperation } from "../display/operations.js"
import { clipPos, cmp, Pos } from "../line/pos.js"
import { lineNo, updateLineHeight } from "../line/utils_line.js"
import { clearLineMeasurementCacheFor, findViewForLine, textHeight } from "../measurement/position_measurement.js"
import { seeReadOnlySpans, seeCollapsedSpans } from "../line/saw_special_spans.js"
import { addMarkedSpan, conflictingCollapsedRange, getMarkedSpanFor, lineIsHidden, lineLength, MarkedSpan, removeMarkedSpan, visualLine } from "../line/spans.js"
import { copyObj, indexOf, lst } from "../util/misc.js"
import { signalLater } from "../util/operation_group.js"
import { widgetHeight } from "../measurement/widgets.js"
import { regChange, regLineChange } from "../display/view_tracking.js"
import { linkedDocs } from "./document_data.js"
import { addChangeToHistory } from "./history.js"
import { reCheckSelection } from "./selection_updates.js"
// TEXTMARKERS
// Created with markText and setBookmark methods. A TextMarker is a
// handle that can be used to clear or find a marked position in the
// document. Line objects hold arrays (markedSpans) containing
// {from, to, marker} object pointing to such marker objects, and
// indicating that such a marker is present on that line. Multiple
// lines may point to the same marker when it spans across lines.
// The spans will have null for their from/to properties when the
// marker continues beyond the start/end of the line. Markers have
// links back to the lines they currently touch.
// Collapsed markers have unique ids, in order to be able to order
// them, which is needed for uniquely determining an outer marker
// when they overlap (they may nest, but not partially overlap).
let nextMarkerId = 0
export class TextMarker {
constructor(doc, type) {
this.lines = []
this.type = type
this.doc = doc
this.id = ++nextMarkerId
}
// Clear the marker.
clear() {
if (this.explicitlyCleared) return
let cm = this.doc.cm, withOp = cm && !cm.curOp
if (withOp) startOperation(cm)
if (hasHandler(this, "clear")) {
let found = this.find()
if (found) signalLater(this, "clear", found.from, found.to)
}
let min = null, max = null
for (let i = 0; i < this.lines.length; ++i) {
let line = this.lines[i]
let span = getMarkedSpanFor(line.markedSpans, this)
if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text")
else if (cm) {
if (span.to != null) max = lineNo(line)
if (span.from != null) min = lineNo(line)
}
line.markedSpans = removeMarkedSpan(line.markedSpans, span)
if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
updateLineHeight(line, textHeight(cm.display))
}
if (cm && this.collapsed && !cm.options.lineWrapping) for (let i = 0; i < this.lines.length; ++i) {
let visual = visualLine(this.lines[i]), len = lineLength(visual)
if (len > cm.display.maxLineLength) {
cm.display.maxLine = visual
cm.display.maxLineLength = len
cm.display.maxLineChanged = true
}
}
if (min != null && cm && this.collapsed) regChange(cm, min, max + 1)
this.lines.length = 0
this.explicitlyCleared = true
if (this.atomic && this.doc.cantEdit) {
this.doc.cantEdit = false
if (cm) reCheckSelection(cm.doc)
}
if (cm) signalLater(cm, "markerCleared", cm, this, min, max)
if (withOp) endOperation(cm)
if (this.parent) this.parent.clear()
}
// Find the position of the marker in the document. Returns a {from,
// to} object by default. Side can be passed to get a specific side
// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
// Pos objects returned contain a line object, rather than a line
// number (used to prevent looking up the same line twice).
find(side, lineObj) {
if (side == null && this.type == "bookmark") side = 1
let from, to
for (let i = 0; i < this.lines.length; ++i) {
let line = this.lines[i]
let span = getMarkedSpanFor(line.markedSpans, this)
if (span.from != null) {
from = Pos(lineObj ? line : lineNo(line), span.from)
if (side == -1) return from
}
if (span.to != null) {
to = Pos(lineObj ? line : lineNo(line), span.to)
if (side == 1) return to
}
}
return from && {from: from, to: to}
}
// Signals that the marker's widget changed, and surrounding layout
// should be recomputed.
changed() {
let pos = this.find(-1, true), widget = this, cm = this.doc.cm
if (!pos || !cm) return
runInOp(cm, () => {
let line = pos.line, lineN = lineNo(pos.line)
let view = findViewForLine(cm, lineN)
if (view) {
clearLineMeasurementCacheFor(view)
cm.curOp.selectionChanged = cm.curOp.forceUpdate = true
}
cm.curOp.updateMaxLine = true
if (!lineIsHidden(widget.doc, line) && widget.height != null) {
let oldHeight = widget.height
widget.height = null
let dHeight = widgetHeight(widget) - oldHeight
if (dHeight)
updateLineHeight(line, line.height + dHeight)
}
signalLater(cm, "markerChanged", cm, this)
})
}
attachLine(line) {
if (!this.lines.length && this.doc.cm) {
let op = this.doc.cm.curOp
if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
(op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this)
}
this.lines.push(line)
}
detachLine(line) {
this.lines.splice(indexOf(this.lines, line), 1)
if (!this.lines.length && this.doc.cm) {
let op = this.doc.cm.curOp
;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this)
}
}
}
eventMixin(TextMarker)
// Create a marker, wire it up to the right lines, and
export function markText(doc, from, to, options, type) {
// Shared markers (across linked documents) are handled separately
// (markTextShared will call out to this again, once per
// document).
if (options && options.shared) return markTextShared(doc, from, to, options, type)
// Ensure we are in an operation.
if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type)
let marker = new TextMarker(doc, type), diff = cmp(from, to)
if (options) copyObj(options, marker, false)
// Don't connect empty markers unless clearWhenEmpty is false
if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
return marker
if (marker.replacedWith) {
// Showing up as a widget implies collapsed (widget replaces text)
marker.collapsed = true
marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget")
if (!options.handleMouseEvents) marker.widgetNode.setAttribute("cm-ignore-events", "true")
if (options.insertLeft) marker.widgetNode.insertLeft = true
}
if (marker.collapsed) {
if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
throw new Error("Inserting collapsed marker partially overlapping an existing one")
seeCollapsedSpans()
}
if (marker.addToHistory)
addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN)
let curLine = from.line, cm = doc.cm, updateMaxLine
doc.iter(curLine, to.line + 1, line => {
if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
updateMaxLine = true
if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0)
addMarkedSpan(line, new MarkedSpan(marker,
curLine == from.line ? from.ch : null,
curLine == to.line ? to.ch : null), doc.cm && doc.cm.curOp)
++curLine
})
// lineIsHidden depends on the presence of the spans, so needs a second pass
if (marker.collapsed) doc.iter(from.line, to.line + 1, line => {
if (lineIsHidden(doc, line)) updateLineHeight(line, 0)
})
if (marker.clearOnEnter) on(marker, "beforeCursorEnter", () => marker.clear())
if (marker.readOnly) {
seeReadOnlySpans()
if (doc.history.done.length || doc.history.undone.length)
doc.clearHistory()
}
if (marker.collapsed) {
marker.id = ++nextMarkerId
marker.atomic = true
}
if (cm) {
// Sync editor state
if (updateMaxLine) cm.curOp.updateMaxLine = true
if (marker.collapsed)
regChange(cm, from.line, to.line + 1)
else if (marker.className || marker.startStyle || marker.endStyle || marker.css ||
marker.attributes || marker.title)
for (let i = from.line; i <= to.line; i++) regLineChange(cm, i, "text")
if (marker.atomic) reCheckSelection(cm.doc)
signalLater(cm, "markerAdded", cm, marker)
}
return marker
}
// SHARED TEXTMARKERS
// A shared marker spans multiple linked documents. It is
// implemented as a meta-marker-object controlling multiple normal
// markers.
export class SharedTextMarker {
constructor(markers, primary) {
this.markers = markers
this.primary = primary
for (let i = 0; i < markers.length; ++i)
markers[i].parent = this
}
clear() {
if (this.explicitlyCleared) return
this.explicitlyCleared = true
for (let i = 0; i < this.markers.length; ++i)
this.markers[i].clear()
signalLater(this, "clear")
}
find(side, lineObj) {
return this.primary.find(side, lineObj)
}
}
eventMixin(SharedTextMarker)
function markTextShared(doc, from, to, options, type) {
options = copyObj(options)
options.shared = false
let markers = [markText(doc, from, to, options, type)], primary = markers[0]
let widget = options.widgetNode
linkedDocs(doc, doc => {
if (widget) options.widgetNode = widget.cloneNode(true)
markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type))
for (let i = 0; i < doc.linked.length; ++i)
if (doc.linked[i].isParent) return
primary = lst(markers)
})
return new SharedTextMarker(markers, primary)
}
export function findSharedMarkers(doc) {
return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), m => m.parent)
}
export function copySharedMarkers(doc, markers) {
for (let i = 0; i < markers.length; i++) {
let marker = markers[i], pos = marker.find()
let mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to)
if (cmp(mFrom, mTo)) {
let subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type)
marker.markers.push(subMark)
subMark.parent = marker
}
}
}
export function detachSharedMarkers(markers) {
for (let i = 0; i < markers.length; i++) {
let marker = markers[i], linked = [marker.primary.doc]
linkedDocs(marker.primary.doc, d => linked.push(d))
for (let j = 0; j < marker.markers.length; j++) {
let subMarker = marker.markers[j]
if (indexOf(linked, subMarker.doc) == -1) {
subMarker.parent = null
marker.markers.splice(j--, 1)
}
}
}
}