66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
export default function wrapMessages(messages, width, charWidth, indent = 0) {
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return messages.withMutations(m => {
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for (let j = 0, llen = messages.size; j < llen; j++) {
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const message = messages.get(j);
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let lineWidth = (6 + (message.from ? message.from.length + 1 : 0)) * charWidth;
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if (lineWidth + message.message.length * charWidth < width) {
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m.setIn([j, 'lines'], [message.message]);
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continue;
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}
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const words = message.message.split(' ');
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const wrapped = [];
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let line = '';
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let wordCount = 0;
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let hasWrapped = false;
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// Add empty line if first word after timestamp + sender wraps
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if (words.length > 0 && message.from && lineWidth + words[0].length * charWidth >= width) {
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wrapped.push(line);
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lineWidth = 0;
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}
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for (let i = 0, wlen = words.length; i < wlen; i++) {
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const word = words[i];
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if (hasWrapped) {
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hasWrapped = false;
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lineWidth += indent;
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}
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lineWidth += word.length * charWidth;
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wordCount++;
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if (lineWidth >= width) {
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if (wordCount !== 1) {
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wrapped.push(line);
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if (i !== wlen - 1) {
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line = `${word} `;
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lineWidth = (word.length + 1) * charWidth;
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wordCount = 1;
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} else {
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wrapped.push(word);
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}
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} else {
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wrapped.push(word);
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lineWidth = 0;
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wordCount = 0;
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}
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hasWrapped = true;
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} else if (i !== wlen - 1) {
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line += `${word} `;
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lineWidth += charWidth;
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} else {
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line += word;
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wrapped.push(line);
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}
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}
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m.setIn([j, 'lines'], wrapped);
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}
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});
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}
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