From d74371c9f525dd4f12baddf22ea64228f7b9004c Mon Sep 17 00:00:00 2001
From: zadam <zadam.apps@gmail.com>
Date: Fri, 7 Jan 2022 20:30:14 +0100
Subject: [PATCH] added missing placeholder.js

---
 .../codemirror/addon/display/placeholder.js   | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 libraries/codemirror/addon/display/placeholder.js

diff --git a/libraries/codemirror/addon/display/placeholder.js b/libraries/codemirror/addon/display/placeholder.js
new file mode 100644
index 000000000..cfb8341db
--- /dev/null
+++ b/libraries/codemirror/addon/display/placeholder.js
@@ -0,0 +1,78 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  CodeMirror.defineOption("placeholder", "", function(cm, val, old) {
+    var prev = old && old != CodeMirror.Init;
+    if (val && !prev) {
+      cm.on("blur", onBlur);
+      cm.on("change", onChange);
+      cm.on("swapDoc", onChange);
+      CodeMirror.on(cm.getInputField(), "compositionupdate", cm.state.placeholderCompose = function() { onComposition(cm) })
+      onChange(cm);
+    } else if (!val && prev) {
+      cm.off("blur", onBlur);
+      cm.off("change", onChange);
+      cm.off("swapDoc", onChange);
+      CodeMirror.off(cm.getInputField(), "compositionupdate", cm.state.placeholderCompose)
+      clearPlaceholder(cm);
+      var wrapper = cm.getWrapperElement();
+      wrapper.className = wrapper.className.replace(" CodeMirror-empty", "");
+    }
+
+    if (val && !cm.hasFocus()) onBlur(cm);
+  });
+
+  function clearPlaceholder(cm) {
+    if (cm.state.placeholder) {
+      cm.state.placeholder.parentNode.removeChild(cm.state.placeholder);
+      cm.state.placeholder = null;
+    }
+  }
+  function setPlaceholder(cm) {
+    clearPlaceholder(cm);
+    var elt = cm.state.placeholder = document.createElement("pre");
+    elt.style.cssText = "height: 0; overflow: visible";
+    elt.style.direction = cm.getOption("direction");
+    elt.className = "CodeMirror-placeholder CodeMirror-line-like";
+    var placeHolder = cm.getOption("placeholder")
+    if (typeof placeHolder == "string") placeHolder = document.createTextNode(placeHolder)
+    elt.appendChild(placeHolder)
+    cm.display.lineSpace.insertBefore(elt, cm.display.lineSpace.firstChild);
+  }
+
+  function onComposition(cm) {
+    setTimeout(function() {
+      var empty = false
+      if (cm.lineCount() == 1) {
+        var input = cm.getInputField()
+        empty = input.nodeName == "TEXTAREA" ? !cm.getLine(0).length
+          : !/[^\u200b]/.test(input.querySelector(".CodeMirror-line").textContent)
+      }
+      if (empty) setPlaceholder(cm)
+      else clearPlaceholder(cm)
+    }, 20)
+  }
+
+  function onBlur(cm) {
+    if (isEmpty(cm)) setPlaceholder(cm);
+  }
+  function onChange(cm) {
+    var wrapper = cm.getWrapperElement(), empty = isEmpty(cm);
+    wrapper.className = wrapper.className.replace(" CodeMirror-empty", "") + (empty ? " CodeMirror-empty" : "");
+
+    if (empty) setPlaceholder(cm);
+    else clearPlaceholder(cm);
+  }
+
+  function isEmpty(cm) {
+    return (cm.lineCount() === 1) && (cm.getLine(0) === "");
+  }
+});