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fix(mail): Keep content of Outlook downlevel-revealed conditional comments. Fixes #6167.

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This commit is contained in:
smizrahi
2026-10-02 17:25:02 +02:00
parent 6c93d6b66c
commit be3630d009
2 changed files with 77 additions and 8 deletions
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Tests/Unit/TestNSString+Utilities.m
+9 -1
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@@ -127,7 +127,15 @@
- (void) test_stringCleanInvalidHTMLTags
{
testEquals([[NSString stringWithString:@"<div>Test<!--></div>"] cleanInvalidHTMLTags], @"<div>Test</div>");
testEquals([[NSString stringWithString:@"<div><!--[if !mso]><span>Test</span><!--<![endif]--></div>"] cleanInvalidHTMLTags], @"<div><!--[if !mso]><span>Test</span><!--[endif]--></div>");
testEquals([[NSString stringWithString:@"<div>Test<!---></div>"] cleanInvalidHTMLTags], @"<div>Test</div>");
testEquals([[NSString stringWithString:@"<div>A<!-->B<!-- c -->C<!-->D</div>"] cleanInvalidHTMLTags], @"<div>AB<!-- c -->CD</div>");
testEquals([[NSString stringWithString:@"<div><!--[if !mso]><span>Test</span><!--<![endif]--></div>"] cleanInvalidHTMLTags], @"<div><!--[if !mso]><span>Test</span><!--<![endif]--></div>");
// Outlook "downlevel-revealed" conditional comment: content must stay visible
testEquals([[NSString stringWithString:@"<a><!--[if !mso]><!--> <div><img src=\"x\"/></div> <!--<![endif]--><!--[if mso]><v:fill/><![endif]--></a>"] cleanInvalidHTMLTags], @"<a><!--[if !mso]><!--> <div><img src=\"x\"/></div> <!--<![endif]--><!--[if mso]><v:fill/><![endif]--></a>");
// libxml2 also ends a comment with "--!>"
testEquals([[NSString stringWithString:@"A<!-- x --!>B<!-->C"] cleanInvalidHTMLTags], @"A<!-- x --!>BC");
// unterminated comment is left as is
testEquals([[NSString stringWithString:@"<div>A<!-- B</div>"] cleanInvalidHTMLTags], @"<div>A<!-- B</div>");
}
- (void) test_stringRemoveHTMLTagsExceptAnchorTags