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104 lines
2.7 KiB
TypeScript
104 lines
2.7 KiB
TypeScript
import { EditorSelection, Prec } from '@codemirror/state'
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import { EditorView, layer } from '@codemirror/view'
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import { rectangleMarkerForRange } from '../utils/layer'
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import { updateHasMouseDownEffect } from './visual/selection'
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import browser from './browser'
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import { updateHasReviewPanelToggledEffect } from './changes/change-manager'
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/**
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* The built-in extension which draws the cursor and selection(s) in layers,
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* copied to make use of a custom version of rectangleMarkerForRange which calls
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* fullHeightCoordsAtPos when in Source mode, extending the top and bottom
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* of the coords to cover the full line height.
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*/
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export const drawSelection = () => {
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return [cursorLayer, selectionLayer, Prec.highest(hideNativeSelection)]
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}
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const canHidePrimary = !browser.ios
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const hideNativeSelection = EditorView.theme({
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'.cm-line': {
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'caret-color': canHidePrimary ? 'transparent !important' : null,
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'& ::selection': {
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backgroundColor: 'transparent !important',
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},
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'&::selection': {
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backgroundColor: 'transparent !important',
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},
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},
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})
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const cursorLayer = layer({
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above: true,
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markers(view) {
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const {
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selection: { ranges, main },
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} = view.state
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const cursors = []
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for (const range of ranges) {
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const primary = range === main
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if (!range.empty || !primary || canHidePrimary) {
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const className = primary
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? 'cm-cursor cm-cursor-primary'
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: 'cm-cursor cm-cursor-secondary'
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const cursor = range.empty
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? range
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: EditorSelection.cursor(
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range.head,
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range.head > range.anchor ? -1 : 1
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)
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for (const piece of rectangleMarkerForRange(view, className, cursor)) {
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cursors.push(piece)
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}
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}
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}
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return cursors
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},
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update(update, dom) {
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if (update.transactions.some(tr => tr.selection)) {
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dom.style.animationName =
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dom.style.animationName === 'cm-blink' ? 'cm-blink2' : 'cm-blink'
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}
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return (
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update.docChanged ||
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update.selectionSet ||
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updateHasMouseDownEffect(update)
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)
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},
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mount(dom, view) {
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dom.style.animationDuration = '1200ms'
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},
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class: 'cm-cursorLayer',
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})
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const selectionLayer = layer({
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above: false,
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markers(view) {
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const markers = []
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for (const range of view.state.selection.ranges) {
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if (!range.empty) {
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markers.push(
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...rectangleMarkerForRange(view, 'cm-selectionBackground', range)
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)
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}
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}
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return markers
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},
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update(update, dom) {
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return (
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update.docChanged ||
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update.selectionSet ||
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update.viewportChanged ||
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updateHasMouseDownEffect(update) ||
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updateHasReviewPanelToggledEffect(update)
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)
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},
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class: 'cm-selectionLayer',
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})
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