84 lines
3.0 KiB
JavaScript
84 lines
3.0 KiB
JavaScript
/*
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* ISC License
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*
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* Copyright (c) 2024 idnovate.com
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* idnovate is a Registered Trademark & Property of idnovate.com, innovación y desarrollo SCP
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* @author idnovate
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* @copyright 2024 idnovate
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* @license https://www.isc.org/licenses/ https://opensource.org/licenses/ISC ISC License
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*/
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(function(mod) {
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if (typeof exports == "object" && typeof module == "object") // CommonJS
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mod(require("../../lib/codemirror"));
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else if (typeof define == "function" && define.amd) // AMD
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define(["../../lib/codemirror"], mod);
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else // Plain browser env
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mod(CodeMirror);
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})(function(CodeMirror) {
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CodeMirror.defineOption("placeholder", "", function(cm, val, old) {
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var prev = old && old != CodeMirror.Init;
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if (val && !prev) {
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cm.on("blur", onBlur);
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cm.on("change", onChange);
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cm.on("swapDoc", onChange);
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onChange(cm);
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} else if (!val && prev) {
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cm.off("blur", onBlur);
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cm.off("change", onChange);
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cm.off("swapDoc", onChange);
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clearPlaceholder(cm);
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var wrapper = cm.getWrapperElement();
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wrapper.className = wrapper.className.replace(" CodeMirror-empty", "");
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}
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if (val && !cm.hasFocus()) onBlur(cm);
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});
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function clearPlaceholder(cm) {
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if (cm.state.placeholder) {
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cm.state.placeholder.parentNode.removeChild(cm.state.placeholder);
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cm.state.placeholder = null;
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}
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}
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function setPlaceholder(cm) {
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clearPlaceholder(cm);
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var elt = cm.state.placeholder = document.createElement("pre");
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elt.style.cssText = "height: 0; overflow: visible";
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elt.style.direction = cm.getOption("direction");
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elt.className = "CodeMirror-placeholder CodeMirror-line-like";
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var placeHolder = cm.getOption("placeholder")
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if (typeof placeHolder == "string") placeHolder = document.createTextNode(placeHolder)
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elt.appendChild(placeHolder)
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cm.display.lineSpace.insertBefore(elt, cm.display.lineSpace.firstChild);
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}
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function onBlur(cm) {
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if (isEmpty(cm)) setPlaceholder(cm);
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}
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function onChange(cm) {
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var wrapper = cm.getWrapperElement(), empty = isEmpty(cm);
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wrapper.className = wrapper.className.replace(" CodeMirror-empty", "") + (empty ? " CodeMirror-empty" : "");
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if (empty) setPlaceholder(cm);
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else clearPlaceholder(cm);
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}
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function isEmpty(cm) {
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return (cm.lineCount() === 1) && (cm.getLine(0) === "");
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}
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});
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