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comparison .cms/lib/codemirror/src/display/selection.js @ 0:78edf6b517a0 draft

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24.10
author Coffee CMS <info@coffee-cms.ru>
date Fri, 11 Oct 2024 22:40:23 +0000
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-1:000000000000 0:78edf6b517a0
1 import { Pos } from "../line/pos.js"
2 import { visualLine } from "../line/spans.js"
3 import { getLine } from "../line/utils_line.js"
4 import { charCoords, cursorCoords, displayWidth, paddingH, wrappedLineExtentChar } from "../measurement/position_measurement.js"
5 import { getOrder, iterateBidiSections } from "../util/bidi.js"
6 import { elt } from "../util/dom.js"
7 import { onBlur } from "./focus.js"
8
9 export function updateSelection(cm) {
10 cm.display.input.showSelection(cm.display.input.prepareSelection())
11 }
12
13 export function prepareSelection(cm, primary = true) {
14 let doc = cm.doc, result = {}
15 let curFragment = result.cursors = document.createDocumentFragment()
16 let selFragment = result.selection = document.createDocumentFragment()
17
18 let customCursor = cm.options.$customCursor
19 if (customCursor) primary = true
20 for (let i = 0; i < doc.sel.ranges.length; i++) {
21 if (!primary && i == doc.sel.primIndex) continue
22 let range = doc.sel.ranges[i]
23 if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) continue
24 let collapsed = range.empty()
25 if (customCursor) {
26 let head = customCursor(cm, range)
27 if (head) drawSelectionCursor(cm, head, curFragment)
28 } else if (collapsed || cm.options.showCursorWhenSelecting) {
29 drawSelectionCursor(cm, range.head, curFragment)
30 }
31 if (!collapsed)
32 drawSelectionRange(cm, range, selFragment)
33 }
34 return result
35 }
36
37 // Draws a cursor for the given range
38 export function drawSelectionCursor(cm, head, output) {
39 let pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine)
40
41 let cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"))
42 cursor.style.left = pos.left + "px"
43 cursor.style.top = pos.top + "px"
44 cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"
45
46 if (/\bcm-fat-cursor\b/.test(cm.getWrapperElement().className)) {
47 let charPos = charCoords(cm, head, "div", null, null)
48 let width = charPos.right - charPos.left
49 cursor.style.width = (width > 0 ? width : cm.defaultCharWidth()) + "px"
50 }
51
52 if (pos.other) {
53 // Secondary cursor, shown when on a 'jump' in bi-directional text
54 let otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"))
55 otherCursor.style.display = ""
56 otherCursor.style.left = pos.other.left + "px"
57 otherCursor.style.top = pos.other.top + "px"
58 otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
59 }
60 }
61
62 function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
63
64 // Draws the given range as a highlighted selection
65 function drawSelectionRange(cm, range, output) {
66 let display = cm.display, doc = cm.doc
67 let fragment = document.createDocumentFragment()
68 let padding = paddingH(cm.display), leftSide = padding.left
69 let rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right
70 let docLTR = doc.direction == "ltr"
71
72 function add(left, top, width, bottom) {
73 if (top < 0) top = 0
74 top = Math.round(top)
75 bottom = Math.round(bottom)
76 fragment.appendChild(elt("div", null, "CodeMirror-selected", `position: absolute; left: ${left}px;
77 top: ${top}px; width: ${width == null ? rightSide - left : width}px;
78 height: ${bottom - top}px`))
79 }
80
81 function drawForLine(line, fromArg, toArg) {
82 let lineObj = getLine(doc, line)
83 let lineLen = lineObj.text.length
84 let start, end
85 function coords(ch, bias) {
86 return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
87 }
88
89 function wrapX(pos, dir, side) {
90 let extent = wrappedLineExtentChar(cm, lineObj, null, pos)
91 let prop = (dir == "ltr") == (side == "after") ? "left" : "right"
92 let ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1)
93 return coords(ch, prop)[prop]
94 }
95
96 let order = getOrder(lineObj, doc.direction)
97 iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, (from, to, dir, i) => {
98 let ltr = dir == "ltr"
99 let fromPos = coords(from, ltr ? "left" : "right")
100 let toPos = coords(to - 1, ltr ? "right" : "left")
101
102 let openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen
103 let first = i == 0, last = !order || i == order.length - 1
104 if (toPos.top - fromPos.top <= 3) { // Single line
105 let openLeft = (docLTR ? openStart : openEnd) && first
106 let openRight = (docLTR ? openEnd : openStart) && last
107 let left = openLeft ? leftSide : (ltr ? fromPos : toPos).left
108 let right = openRight ? rightSide : (ltr ? toPos : fromPos).right
109 add(left, fromPos.top, right - left, fromPos.bottom)
110 } else { // Multiple lines
111 let topLeft, topRight, botLeft, botRight
112 if (ltr) {
113 topLeft = docLTR && openStart && first ? leftSide : fromPos.left
114 topRight = docLTR ? rightSide : wrapX(from, dir, "before")
115 botLeft = docLTR ? leftSide : wrapX(to, dir, "after")
116 botRight = docLTR && openEnd && last ? rightSide : toPos.right
117 } else {
118 topLeft = !docLTR ? leftSide : wrapX(from, dir, "before")
119 topRight = !docLTR && openStart && first ? rightSide : fromPos.right
120 botLeft = !docLTR && openEnd && last ? leftSide : toPos.left
121 botRight = !docLTR ? rightSide : wrapX(to, dir, "after")
122 }
123 add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom)
124 if (fromPos.bottom < toPos.top) add(leftSide, fromPos.bottom, null, toPos.top)
125 add(botLeft, toPos.top, botRight - botLeft, toPos.bottom)
126 }
127
128 if (!start || cmpCoords(fromPos, start) < 0) start = fromPos
129 if (cmpCoords(toPos, start) < 0) start = toPos
130 if (!end || cmpCoords(fromPos, end) < 0) end = fromPos
131 if (cmpCoords(toPos, end) < 0) end = toPos
132 })
133 return {start: start, end: end}
134 }
135
136 let sFrom = range.from(), sTo = range.to()
137 if (sFrom.line == sTo.line) {
138 drawForLine(sFrom.line, sFrom.ch, sTo.ch)
139 } else {
140 let fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line)
141 let singleVLine = visualLine(fromLine) == visualLine(toLine)
142 let leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end
143 let rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start
144 if (singleVLine) {
145 if (leftEnd.top < rightStart.top - 2) {
146 add(leftEnd.right, leftEnd.top, null, leftEnd.bottom)
147 add(leftSide, rightStart.top, rightStart.left, rightStart.bottom)
148 } else {
149 add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom)
150 }
151 }
152 if (leftEnd.bottom < rightStart.top)
153 add(leftSide, leftEnd.bottom, null, rightStart.top)
154 }
155
156 output.appendChild(fragment)
157 }
158
159 // Cursor-blinking
160 export function restartBlink(cm) {
161 if (!cm.state.focused) return
162 let display = cm.display
163 clearInterval(display.blinker)
164 let on = true
165 display.cursorDiv.style.visibility = ""
166 if (cm.options.cursorBlinkRate > 0)
167 display.blinker = setInterval(() => {
168 if (!cm.hasFocus()) onBlur(cm)
169 display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"
170 }, cm.options.cursorBlinkRate)
171 else if (cm.options.cursorBlinkRate < 0)
172 display.cursorDiv.style.visibility = "hidden"
173 }