--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.cms/lib/codemirror/src/input/indent.js	Fri Oct 11 22:40:23 2024 +0000
@@ -0,0 +1,71 @@
+import { getContextBefore } from "../line/highlight.js"
+import { Pos } from "../line/pos.js"
+import { getLine } from "../line/utils_line.js"
+import { replaceRange } from "../model/changes.js"
+import { Range } from "../model/selection.js"
+import { replaceOneSelection } from "../model/selection_updates.js"
+import { countColumn, Pass, spaceStr } from "../util/misc.js"
+
+// Indent the given line. The how parameter can be "smart",
+// "add"/null, "subtract", or "prev". When aggressive is false
+// (typically set to true for forced single-line indents), empty
+// lines are not indented, and places where the mode returns Pass
+// are left alone.
+export function indentLine(cm, n, how, aggressive) {
+  let doc = cm.doc, state
+  if (how == null) how = "add"
+  if (how == "smart") {
+    // Fall back to "prev" when the mode doesn't have an indentation
+    // method.
+    if (!doc.mode.indent) how = "prev"
+    else state = getContextBefore(cm, n).state
+  }
+
+  let tabSize = cm.options.tabSize
+  let line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
+  if (line.stateAfter) line.stateAfter = null
+  let curSpaceString = line.text.match(/^\s*/)[0], indentation
+  if (!aggressive && !/\S/.test(line.text)) {
+    indentation = 0
+    how = "not"
+  } else if (how == "smart") {
+    indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
+    if (indentation == Pass || indentation > 150) {
+      if (!aggressive) return
+      how = "prev"
+    }
+  }
+  if (how == "prev") {
+    if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize)
+    else indentation = 0
+  } else if (how == "add") {
+    indentation = curSpace + cm.options.indentUnit
+  } else if (how == "subtract") {
+    indentation = curSpace - cm.options.indentUnit
+  } else if (typeof how == "number") {
+    indentation = curSpace + how
+  }
+  indentation = Math.max(0, indentation)
+
+  let indentString = "", pos = 0
+  if (cm.options.indentWithTabs)
+    for (let i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"}
+  if (pos < indentation) indentString += spaceStr(indentation - pos)
+
+  if (indentString != curSpaceString) {
+    replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
+    line.stateAfter = null
+    return true
+  } else {
+    // Ensure that, if the cursor was in the whitespace at the start
+    // of the line, it is moved to the end of that space.
+    for (let i = 0; i < doc.sel.ranges.length; i++) {
+      let range = doc.sel.ranges[i]
+      if (range.head.line == n && range.head.ch < curSpaceString.length) {
+        let pos = Pos(n, curSpaceString.length)
+        replaceOneSelection(doc, i, new Range(pos, pos))
+        break
+      }
+    }
+  }
+}