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handle scanning text for janky websites better #23

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This commit is contained in:
Alex Yatskov 2017-05-21 22:44:22 -07:00
parent 48f612bb92
commit 84f5954ad5
1 changed files with 17 additions and 3 deletions
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20
ext/fg/js/source-range.js
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@ -84,8 +84,22 @@ class TextSourceRange {
}
static shouldEnter(node) {
if (node.nodeType !== 1) {
return false;
}
const skip = ['RT', 'SCRIPT', 'STYLE'];
return !skip.includes(node.nodeName);
if (skip.includes(node.nodeName)) {
return false;
}
const style = window.getComputedStyle(node);
const hidden =
style.visibility === 'hidden' ||
style.display === 'none' ||
parseFloat(style.fontSize) === 0;
return !hidden;
}
static seekForward(node, offset, length) {
@ -106,7 +120,7 @@ class TextSourceRange {
}
static seekForwardHelper(node, state) {
if (node.nodeType === 3) {
if (node.nodeType === 3 && node.parentElement && TextSourceRange.shouldEnter(node.parentElement)) {
const offset = state.node === node ? state.offset : 0;
const remaining = node.length - offset;
const consumed = Math.min(remaining, state.remainder);
@ -143,7 +157,7 @@ class TextSourceRange {
}
static seekBackwardHelper(node, state) {
if (node.nodeType === 3) {
if (node.nodeType === 3 && node.parentElement && TextSourceRange.shouldEnter(node.parentElement)) {
const offset = state.node === node ? state.offset : node.length;
const remaining = offset;
const consumed = Math.min(remaining, state.remainder);