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