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	Externalize clipboard copying to the [clippie](https://github.com/silverwind/clippie) module which I feel I can maintain outside this repo for shared benefit with my other projects. The module is feature-equivalent to the previous code and has one improvement where it sets `aria-hidden` on the fallback textarea, preventing screen readers from picking it up. Also it support `Array` of `content` as well to copy multiple items at once, in case it's ever needed.
		
			
				
	
	
		
			60 lines
		
	
	
	
		
			2 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			60 lines
		
	
	
	
		
			2 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
import {clippie} from 'clippie';
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import {showTemporaryTooltip} from '../modules/tippy.js';
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import {convertImage} from '../utils.js';
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const {i18n} = window.config;
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async function doCopy(content, btn) {
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  const success = await clippie(content);
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  showTemporaryTooltip(btn, success ? i18n.copy_success : i18n.copy_error);
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}
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export function initCopyContent() {
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  const btn = document.getElementById('copy-content');
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  if (!btn || btn.classList.contains('disabled')) return;
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  btn.addEventListener('click', async () => {
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    if (btn.classList.contains('is-loading')) return;
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    let content, isImage;
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    const link = btn.getAttribute('data-link');
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    // when data-link is present, we perform a fetch. this is either because
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    // the text to copy is not in the DOM or it is an image which should be
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    // fetched to copy in full resolution
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    if (link) {
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      btn.classList.add('is-loading');
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      try {
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        const res = await fetch(link, {credentials: 'include', redirect: 'follow'});
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        const contentType = res.headers.get('content-type');
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        if (contentType.startsWith('image/') && !contentType.startsWith('image/svg')) {
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          isImage = true;
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          content = await res.blob();
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        } else {
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          content = await res.text();
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        }
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      } catch {
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        return showTemporaryTooltip(btn, i18n.copy_error);
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      } finally {
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        btn.classList.remove('is-loading');
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      }
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    } else { // text, read from DOM
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      const lineEls = document.querySelectorAll('.file-view .lines-code');
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      content = Array.from(lineEls).map((el) => el.textContent).join('');
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    }
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    try {
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      await doCopy(content, btn);
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    } catch {
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      if (isImage) { // convert image to png as last-resort as some browser only support png copy
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        try {
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          await doCopy(await convertImage(content, 'image/png'), btn);
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        } catch {
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          showTemporaryTooltip(btn, i18n.copy_error);
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        }
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      } else {
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        showTemporaryTooltip(btn, i18n.copy_error);
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      }
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    }
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  });
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}
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