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comparison .cms/lib/codemirror/addon/display/placeholder.js @ 0:78edf6b517a0 draft

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24.10
author Coffee CMS <info@coffee-cms.ru>
date Fri, 11 Oct 2024 22:40:23 +0000
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-1:000000000000 0:78edf6b517a0
1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
2 // Distributed under an MIT license: https://codemirror.net/5/LICENSE
3
4 (function(mod) {
5 if (typeof exports == "object" && typeof module == "object") // CommonJS
6 mod(require("../../lib/codemirror"));
7 else if (typeof define == "function" && define.amd) // AMD
8 define(["../../lib/codemirror"], mod);
9 else // Plain browser env
10 mod(CodeMirror);
11 })(function(CodeMirror) {
12 CodeMirror.defineOption("placeholder", "", function(cm, val, old) {
13 var prev = old && old != CodeMirror.Init;
14 if (val && !prev) {
15 cm.on("blur", onBlur);
16 cm.on("change", onChange);
17 cm.on("swapDoc", onChange);
18 CodeMirror.on(cm.getInputField(), "compositionupdate", cm.state.placeholderCompose = function() { onComposition(cm) })
19 onChange(cm);
20 } else if (!val && prev) {
21 cm.off("blur", onBlur);
22 cm.off("change", onChange);
23 cm.off("swapDoc", onChange);
24 CodeMirror.off(cm.getInputField(), "compositionupdate", cm.state.placeholderCompose)
25 clearPlaceholder(cm);
26 var wrapper = cm.getWrapperElement();
27 wrapper.className = wrapper.className.replace(" CodeMirror-empty", "");
28 }
29
30 if (val && !cm.hasFocus()) onBlur(cm);
31 });
32
33 function clearPlaceholder(cm) {
34 if (cm.state.placeholder) {
35 cm.state.placeholder.parentNode.removeChild(cm.state.placeholder);
36 cm.state.placeholder = null;
37 }
38 }
39 function setPlaceholder(cm) {
40 clearPlaceholder(cm);
41 var elt = cm.state.placeholder = document.createElement("pre");
42 elt.style.cssText = "height: 0; overflow: visible";
43 elt.style.direction = cm.getOption("direction");
44 elt.className = "CodeMirror-placeholder CodeMirror-line-like";
45 var placeHolder = cm.getOption("placeholder")
46 if (typeof placeHolder == "string") placeHolder = document.createTextNode(placeHolder)
47 elt.appendChild(placeHolder)
48 cm.display.lineSpace.insertBefore(elt, cm.display.lineSpace.firstChild);
49 }
50
51 function onComposition(cm) {
52 setTimeout(function() {
53 var empty = false
54 if (cm.lineCount() == 1) {
55 var input = cm.getInputField()
56 empty = input.nodeName == "TEXTAREA" ? !cm.getLine(0).length
57 : !/[^\u200b]/.test(input.querySelector(".CodeMirror-line").textContent)
58 }
59 if (empty) setPlaceholder(cm)
60 else clearPlaceholder(cm)
61 }, 20)
62 }
63
64 function onBlur(cm) {
65 if (isEmpty(cm)) setPlaceholder(cm);
66 }
67 function onChange(cm) {
68 var wrapper = cm.getWrapperElement(), empty = isEmpty(cm);
69 wrapper.className = wrapper.className.replace(" CodeMirror-empty", "") + (empty ? " CodeMirror-empty" : "");
70
71 if (empty) setPlaceholder(cm);
72 else clearPlaceholder(cm);
73 }
74
75 function isEmpty(cm) {
76 return (cm.lineCount() === 1) && (cm.getLine(0) === "");
77 }
78 });