openrat-cms

selection.min.js (6917B)

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 import { Pos } from "../line/pos.js"
 import { visualLine } from "../line/spans.js"
 import { getLine } from "../line/utils_line.js"
 import { charCoords, cursorCoords, displayWidth, paddingH, wrappedLineExtentChar } from "../measurement/position_measurement.js"
 import { getOrder, iterateBidiSections } from "../util/bidi.js"
 import { elt } from "../util/dom.js"
 
 export function updateSelection(cm) {
   cm.display.input.showSelection(cm.display.input.prepareSelection())
 }
 
 export function prepareSelection(cm, primary = true) {
   let doc = cm.doc, result = {}
   let curFragment = result.cursors = document.createDocumentFragment()
   let selFragment = result.selection = document.createDocumentFragment()
 
   for (let i = 0; i < doc.sel.ranges.length; i++) {
     if (!primary && i == doc.sel.primIndex) continue
     let range = doc.sel.ranges[i]
     if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) continue
     let collapsed = range.empty()
     if (collapsed || cm.options.showCursorWhenSelecting)
       drawSelectionCursor(cm, range.head, curFragment)
     if (!collapsed)
       drawSelectionRange(cm, range, selFragment)
   }
   return result
 }
 
 // Draws a cursor for the given range
 export function drawSelectionCursor(cm, head, output) {
   let pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine)
 
   let cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"))
   cursor.style.left = pos.left + "px"
   cursor.style.top = pos.top + "px"
   cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"
 
   if (pos.other) {
     // Secondary cursor, shown when on a 'jump' in bi-directional text
     let otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"))
     otherCursor.style.display = ""
     otherCursor.style.left = pos.other.left + "px"
     otherCursor.style.top = pos.other.top + "px"
     otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
   }
 }
 
 function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
 
 // Draws the given range as a highlighted selection
 function drawSelectionRange(cm, range, output) {
   let display = cm.display, doc = cm.doc
   let fragment = document.createDocumentFragment()
   let padding = paddingH(cm.display), leftSide = padding.left
   let rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right
   let docLTR = doc.direction == "ltr"
 
   function add(left, top, width, bottom) {
     if (top < 0) top = 0
     top = Math.round(top)
     bottom = Math.round(bottom)
     fragment.appendChild(elt("div", null, "CodeMirror-selected", `position: absolute; left: ${left}px;
                              top: ${top}px; width: ${width == null ? rightSide - left : width}px;
                              height: ${bottom - top}px`))
   }
 
   function drawForLine(line, fromArg, toArg) {
     let lineObj = getLine(doc, line)
     let lineLen = lineObj.text.length
     let start, end
     function coords(ch, bias) {
       return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
     }
 
     function wrapX(pos, dir, side) {
       let extent = wrappedLineExtentChar(cm, lineObj, null, pos)
       let prop = (dir == "ltr") == (side == "after") ? "left" : "right"
       let ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1)
       return coords(ch, prop)[prop]
     }
 
     let order = getOrder(lineObj, doc.direction)
     iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, (from, to, dir, i) => {
       let ltr = dir == "ltr"
       let fromPos = coords(from, ltr ? "left" : "right")
       let toPos = coords(to - 1, ltr ? "right" : "left")
 
       let openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen
       let first = i == 0, last = !order || i == order.length - 1
       if (toPos.top - fromPos.top <= 3) { // Single line
         let openLeft = (docLTR ? openStart : openEnd) && first
         let openRight = (docLTR ? openEnd : openStart) && last
         let left = openLeft ? leftSide : (ltr ? fromPos : toPos).left
         let right = openRight ? rightSide : (ltr ? toPos : fromPos).right
         add(left, fromPos.top, right - left, fromPos.bottom)
       } else { // Multiple lines
         let topLeft, topRight, botLeft, botRight
         if (ltr) {
           topLeft = docLTR && openStart && first ? leftSide : fromPos.left
           topRight = docLTR ? rightSide : wrapX(from, dir, "before")
           botLeft = docLTR ? leftSide : wrapX(to, dir, "after")
           botRight = docLTR && openEnd && last ? rightSide : toPos.right
         } else {
           topLeft = !docLTR ? leftSide : wrapX(from, dir, "before")
           topRight = !docLTR && openStart && first ? rightSide : fromPos.right
           botLeft = !docLTR && openEnd && last ? leftSide : toPos.left
           botRight = !docLTR ? rightSide : wrapX(to, dir, "after")
         }
         add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom)
         if (fromPos.bottom < toPos.top) add(leftSide, fromPos.bottom, null, toPos.top)
         add(botLeft, toPos.top, botRight - botLeft, toPos.bottom)
       }
 
       if (!start || cmpCoords(fromPos, start) < 0) start = fromPos
       if (cmpCoords(toPos, start) < 0) start = toPos
       if (!end || cmpCoords(fromPos, end) < 0) end = fromPos
       if (cmpCoords(toPos, end) < 0) end = toPos
     })
     return {start: start, end: end}
   }
 
   let sFrom = range.from(), sTo = range.to()
   if (sFrom.line == sTo.line) {
     drawForLine(sFrom.line, sFrom.ch, sTo.ch)
   } else {
     let fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line)
     let singleVLine = visualLine(fromLine) == visualLine(toLine)
     let leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end
     let rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start
     if (singleVLine) {
       if (leftEnd.top < rightStart.top - 2) {
         add(leftEnd.right, leftEnd.top, null, leftEnd.bottom)
         add(leftSide, rightStart.top, rightStart.left, rightStart.bottom)
       } else {
         add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom)
       }
     }
     if (leftEnd.bottom < rightStart.top)
       add(leftSide, leftEnd.bottom, null, rightStart.top)
   }
 
   output.appendChild(fragment)
 }
 
 // Cursor-blinking
 export function restartBlink(cm) {
   if (!cm.state.focused) return
   let display = cm.display
   clearInterval(display.blinker)
   let on = true
   display.cursorDiv.style.visibility = ""
   if (cm.options.cursorBlinkRate > 0)
     display.blinker = setInterval(() => display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden",
       cm.options.cursorBlinkRate)
   else if (cm.options.cursorBlinkRate < 0)
     display.cursorDiv.style.visibility = "hidden"
 }