49 lines
2.1 KiB
JavaScript
49 lines
2.1 KiB
JavaScript
|
import { lineNumberFor } from "../line/utils_line.js"
|
||
|
|
import { compensateForHScroll } from "../measurement/position_measurement.js"
|
||
|
|
import { elt } from "../util/dom.js"
|
||
|
|
|
||
|
|
import { updateGutterSpace } from "./update_display.js"
|
||
|
|
|
||
|
|
// Re-align line numbers and gutter marks to compensate for
|
||
|
|
// horizontal scrolling.
|
||
|
|
export function alignHorizontally(cm) {
|
||
|
|
let display = cm.display, view = display.view
|
||
|
|
if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return
|
||
|
|
let comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft
|
||
|
|
let gutterW = display.gutters.offsetWidth, left = comp + "px"
|
||
|
|
for (let i = 0; i < view.length; i++) if (!view[i].hidden) {
|
||
|
|
if (cm.options.fixedGutter) {
|
||
|
|
if (view[i].gutter)
|
||
|
|
view[i].gutter.style.left = left
|
||
|
|
if (view[i].gutterBackground)
|
||
|
|
view[i].gutterBackground.style.left = left
|
||
|
|
}
|
||
|
|
let align = view[i].alignable
|
||
|
|
if (align) for (let j = 0; j < align.length; j++)
|
||
|
|
align[j].style.left = left
|
||
|
|
}
|
||
|
|
if (cm.options.fixedGutter)
|
||
|
|
display.gutters.style.left = (comp + gutterW) + "px"
|
||
|
|
}
|
||
|
|
|
||
|
|
// Used to ensure that the line number gutter is still the right
|
||
|
|
// size for the current document size. Returns true when an update
|
||
|
|
// is needed.
|
||
|
|
export function maybeUpdateLineNumberWidth(cm) {
|
||
|
|
if (!cm.options.lineNumbers) return false
|
||
|
|
let doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display
|
||
|
|
if (last.length != display.lineNumChars) {
|
||
|
|
let test = display.measure.appendChild(elt("div", [elt("div", last)],
|
||
|
|
"CodeMirror-linenumber CodeMirror-gutter-elt"))
|
||
|
|
let innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW
|
||
|
|
display.lineGutter.style.width = ""
|
||
|
|
display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1
|
||
|
|
display.lineNumWidth = display.lineNumInnerWidth + padding
|
||
|
|
display.lineNumChars = display.lineNumInnerWidth ? last.length : -1
|
||
|
|
display.lineGutter.style.width = display.lineNumWidth + "px"
|
||
|
|
updateGutterSpace(cm.display)
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|