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29 lines
881 B
JavaScript
29 lines
881 B
JavaScript
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/**
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* CodeMirror utilities that are relevant to both the input and output
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2022
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* @license Apache-2.0
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*/
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/**
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* Override for rendering special characters.
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* Should mirror the toDOM function in
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* https://github.com/codemirror/view/blob/main/src/special-chars.ts#L150
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* But reverts the replacement of line feeds with newline control pictures.
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* @param {number} code
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* @param {string} desc
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* @param {string} placeholder
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* @returns {element}
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*/
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export function renderSpecialChar(code, desc, placeholder) {
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const s = document.createElement("span");
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// CodeMirror changes 0x0a to "NL" instead of "LF". We change it back.
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s.textContent = code === 0x0a ? "\u240a" : placeholder;
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s.title = desc;
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s.setAttribute("aria-label", desc);
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s.className = "cm-specialChar";
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return s;
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}
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