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Merge pull request #19576 from nicolo-ribaudo/fix-linkannotation

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Fix autolinking with highlighted search results
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Jonas Jenwald 2025-03-02 19:51:15 +01:00 • committed by GitHub
commit 3cd1b10433
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2 changed files with 127 additions and 4 deletions
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46
web/autolinker.js
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@ -69,13 +69,55 @@ function calculateLinkPosition(range, pdfPageView) {
return { quadPoints, rect };
}
/**
* Given a DOM node `container` and an index into its text contents `offset`,
* returns a pair consisting of text node that the `offset` actually points
* to, together with the offset relative to that text node.
* When the offset points at the boundary between two node, the result will
* point to the first text node in depth-first traversal order.
*
* For example, given this DOM:
* <p>abc<span>def</span>ghi</p>
*
* textPosition(p, 0) -> [#text "abc", 0] (before `a`)
* textPosition(p, 2) -> [#text "abc", 2] (between `b` and `c`)
* textPosition(p, 3) -> [#text "abc", 3] (after `c`)
* textPosition(p, 5) -> [#text "def", 2] (between `e` and `f`)
* textPosition(p, 6) -> [#text "def", 3] (after `f`)
*/
function textPosition(container, offset) {
let currentContainer = container;
do {
if (currentContainer.nodeType === Node.TEXT_NODE) {
const currentLength = currentContainer.textContent.length;
if (offset <= currentLength) {
return [currentContainer, offset];
}
offset -= currentLength;
} else if (currentContainer.firstChild) {
currentContainer = currentContainer.firstChild;
continue;
}
while (!currentContainer.nextSibling && currentContainer !== container) {
currentContainer = currentContainer.parentNode;
}
if (currentContainer !== container) {
currentContainer = currentContainer.nextSibling;
}
} while (currentContainer !== container);
throw new Error("Offset is bigger than container's contents length.");
}
function createLinkAnnotation({ url, index, length }, pdfPageView, id) {
const highlighter = pdfPageView._textHighlighter;
const [{ begin, end }] = highlighter._convertMatches([index], [length]);
const range = new Range();
range.setStart(highlighter.textDivs[begin.divIdx].firstChild, begin.offset);
range.setEnd(highlighter.textDivs[end.divIdx].firstChild, end.offset);
range.setStart(
...textPosition(highlighter.textDivs[begin.divIdx], begin.offset)
);
range.setEnd(...textPosition(highlighter.textDivs[end.divIdx], end.offset));
return {
id: `inferred_link_${id}`,