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"
import { onBlur } from "./focus.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()
let customCursor = cm.options.$customCursor
if (customCursor) primary = true
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 (customCursor) {
let head = customCursor(cm, range)
if (head) drawSelectionCursor(cm, head, curFragment)
} else 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 (/\bcm-fat-cursor\b/.test(cm.getWrapperElement().className)) {
let charPos = charCoords(cm, head, "div", null, null)
let width = charPos.right - charPos.left
cursor.style.width = (width > 0 ? width : cm.defaultCharWidth()) + "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(() => {
if (!cm.hasFocus()) onBlur(cm)
display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"
}, cm.options.cursorBlinkRate)
else if (cm.options.cursorBlinkRate < 0)
display.cursorDiv.style.visibility = "hidden"
}
|