diff options
author | Douwe Maan <douwe@selenight.nl> | 2017-05-19 04:17:27 +0300 |
---|---|---|
committer | Douwe Maan <douwe@selenight.nl> | 2017-05-19 06:24:08 +0300 |
commit | 4070d58af75d74cad12247e2da095d5a8b92dc1f (patch) | |
tree | eb69a70c215161da8e2d252a343b7c397cb836f7 /app/assets/javascripts/copy_as_gfm.js | |
parent | 36ede00876aacd0005eac8e9b4779e3014519e0c (diff) |
Don't copy empty elements that were not selected on purpose as GFM
Diffstat (limited to 'app/assets/javascripts/copy_as_gfm.js')
-rw-r--r-- | app/assets/javascripts/copy_as_gfm.js | 77 |
1 files changed, 51 insertions, 26 deletions
diff --git a/app/assets/javascripts/copy_as_gfm.js b/app/assets/javascripts/copy_as_gfm.js index 570799c030e..8ded09a7cc1 100644 --- a/app/assets/javascripts/copy_as_gfm.js +++ b/app/assets/javascripts/copy_as_gfm.js @@ -18,12 +18,12 @@ const gfmRules = { }, }, TaskListFilter: { - 'input[type=checkbox].task-list-item-checkbox'(el, text) { + 'input[type=checkbox].task-list-item-checkbox'(el) { return `[${el.checked ? 'x' : ' '}]`; }, }, ReferenceFilter: { - '.tooltip'(el, text) { + '.tooltip'(el) { return ''; }, 'a.gfm:not([data-link=true])'(el, text) { @@ -39,15 +39,15 @@ const gfmRules = { }, }, TableOfContentsFilter: { - 'ul.section-nav'(el, text) { + 'ul.section-nav'(el) { return '[[_TOC_]]'; }, }, EmojiFilter: { - 'img.emoji'(el, text) { + 'img.emoji'(el) { return el.getAttribute('alt'); }, - 'gl-emoji'(el, text) { + 'gl-emoji'(el) { return `:${el.getAttribute('data-name')}:`; }, }, @@ -57,13 +57,13 @@ const gfmRules = { }, }, VideoLinkFilter: { - '.video-container'(el, text) { + '.video-container'(el) { const videoEl = el.querySelector('video'); if (!videoEl) return false; return CopyAsGFM.nodeToGFM(videoEl); }, - 'video'(el, text) { + 'video'(el) { return `![${el.dataset.title}](${el.getAttribute('src')})`; }, }, @@ -74,19 +74,19 @@ const gfmRules = { 'code.code.math[data-math-style=inline]'(el, text) { return `$\`${text}\`$`; }, - 'span.katex-display span.katex-mathml'(el, text) { + 'span.katex-display span.katex-mathml'(el) { const mathAnnotation = el.querySelector('annotation[encoding="application/x-tex"]'); if (!mathAnnotation) return false; return `\`\`\`math\n${CopyAsGFM.nodeToGFM(mathAnnotation)}\n\`\`\``; }, - 'span.katex-mathml'(el, text) { + 'span.katex-mathml'(el) { const mathAnnotation = el.querySelector('annotation[encoding="application/x-tex"]'); if (!mathAnnotation) return false; return `$\`${CopyAsGFM.nodeToGFM(mathAnnotation)}\`$`; }, - 'span.katex-html'(el, text) { + 'span.katex-html'(el) { // We don't want to include the content of this element in the copied text. return ''; }, @@ -95,7 +95,7 @@ const gfmRules = { }, }, SanitizationFilter: { - 'a[name]:not([href]):empty'(el, text) { + 'a[name]:not([href]):empty'(el) { return el.outerHTML; }, 'dl'(el, text) { @@ -143,7 +143,7 @@ const gfmRules = { }, }, MarkdownFilter: { - 'br'(el, text) { + 'br'(el) { // Two spaces at the end of a line are turned into a BR return ' '; }, @@ -162,7 +162,7 @@ const gfmRules = { 'blockquote'(el, text) { return text.trim().split('\n').map(s => `> ${s}`.trim()).join('\n'); }, - 'img'(el, text) { + 'img'(el) { return `![${el.getAttribute('alt')}](${el.getAttribute('src')})`; }, 'a.anchor'(el, text) { @@ -222,10 +222,10 @@ const gfmRules = { 'sup'(el, text) { return `^${text}`; }, - 'hr'(el, text) { + 'hr'(el) { return '-----'; }, - 'table'(el, text) { + 'table'(el) { const theadEl = el.querySelector('thead'); const tbodyEl = el.querySelector('tbody'); if (!theadEl || !tbodyEl) return false; @@ -233,11 +233,11 @@ const gfmRules = { const theadText = CopyAsGFM.nodeToGFM(theadEl); const tbodyText = CopyAsGFM.nodeToGFM(tbodyEl); - return theadText + tbodyText; + return [theadText, tbodyText].join('\n'); }, 'thead'(el, text) { const cells = _.map(el.querySelectorAll('th'), (cell) => { - let chars = CopyAsGFM.nodeToGFM(cell).trim().length + 2; + let chars = CopyAsGFM.nodeToGFM(cell).length + 2; let before = ''; let after = ''; @@ -262,10 +262,15 @@ const gfmRules = { return before + middle + after; }); - return `${text}|${cells.join('|')}|`; + const separatorRow = `|${cells.join('|')}|`; + + return [text, separatorRow].join('\n'); }, - 'tr'(el, text) { - const cells = _.map(el.querySelectorAll('td, th'), cell => CopyAsGFM.nodeToGFM(cell).trim()); + 'tr'(el) { + const cellEls = el.querySelectorAll('td, th'); + if (cellEls.length === 0) return false; + + const cells = _.map(cellEls, cell => CopyAsGFM.nodeToGFM(cell)); return `| ${cells.join(' | ')} |`; }, }, @@ -343,7 +348,9 @@ class CopyAsGFM { return codeEl; } - static nodeToGFM(node) { + static nodeToGFM(node, respectWhitespaceParam = false) { + let respectWhitespace = respectWhitespaceParam; + if (node.nodeType === Node.COMMENT_NODE) { return ''; } @@ -352,7 +359,9 @@ class CopyAsGFM { return node.textContent; } - const text = this.innerGFM(node); + respectWhitespace = respectWhitespace || (node.nodeName === 'PRE' || node.nodeName === 'CODE'); + + const text = this.innerGFM(node, respectWhitespace); if (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) { return text; @@ -366,7 +375,17 @@ class CopyAsGFM { if (!window.gl.utils.nodeMatchesSelector(node, selector)) continue; - const result = func(node, text); + let result; + if (func.length === 2) { + // if `func` takes 2 arguments, it depends on text. + // if there is no text, we don't need to generate GFM for this node. + if (text.length === 0) continue; + + result = func(node, text); + } else { + result = func(node); + } + if (result === false) continue; return result; @@ -376,7 +395,7 @@ class CopyAsGFM { return text; } - static innerGFM(parentNode) { + static innerGFM(parentNode, respectWhitespace = false) { const nodes = parentNode.childNodes; const clonedParentNode = parentNode.cloneNode(true); @@ -386,13 +405,19 @@ class CopyAsGFM { const node = nodes[i]; const clonedNode = clonedNodes[i]; - const text = this.nodeToGFM(node); + const text = this.nodeToGFM(node, respectWhitespace); // `clonedNode.replaceWith(text)` is not yet widely supported clonedNode.parentNode.replaceChild(document.createTextNode(text), clonedNode); } - return clonedParentNode.innerText || clonedParentNode.textContent; + let nodeText = clonedParentNode.innerText || clonedParentNode.textContent; + + if (!respectWhitespace) { + nodeText = nodeText.trim(); + } + + return nodeText; } } |