23232 2009-01-10 17:22:40 -0800 Problems with Selection::appendTrailingWhitespace() 2009-01-12 13:08:54 -0800 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) PC OS X 10.5 RESOLVED FIXED P2 Normal --- 1 eroman eroman oldest_to_newest 105167 0 eroman 2009-01-10 17:22:40 -0800 There are some problems with Selection::appendTrailingWhitespace(): 1. May set endpoint to null node, causing crash in WebCore::Selection::toRange. (This is because VisiblePosition::next() doesn't necessarily advance to same place as VisiblePosition::characterAfter(), especially if it is a non-visible character.). 2. Should match NBSP as whitespace. 3. Should search for whitepsace in sibling nodes too. For example: <div><span>doubleclickme</span> </div> Should grow selection to include the whitespace outside of the span element (to be consistent with IE/FF). <background> Selection::appendTrailingWhitespace() is a codepath used only by Chromium, see http://trac.webkit.org/changeset/38735 which introduced it. </background> 105168 1 26594 eroman 2009-01-10 17:36:16 -0800 Created attachment 26594 Rewrite appendTrailingWhitespace() using CharacterIterator. * Modified LayoutTests/editing/selection/doubleclick-whitespace.html to include additional test cases. * Added a separate layout test for the crasher. 105219 2 26594 darin 2009-01-11 08:39:05 -0800 Comment on attachment 26594 Rewrite appendTrailingWhitespace() using CharacterIterator. > + Node *n = pos.node(); WebKit coding style requires that you do Node* n rather than Node *n. > + Document *d = n->document(); > + Node *de = d->documentElement(); Same here. > + Node *boundary = n->enclosingBlockFlowElement(); And here. > + if (!searchRange.get()) There's no need for .get() here. You can use the ! operator with a RefPtr without calling it. > + for (; !charIt.atEnd() && charIt.length() > 0; charIt.advance(1)) { There's no need to check atEnd() here. Once you're at the end, length is guaranteed to return 0. In WebKit style we'd normally code this without the "> 0" also. > + if (isSpaceOrNewline(c) || c == noBreakSpace) > + m_end = charIt.range()->endPosition(); > + else > + break; Maybe the should be written the other way around, with the break first, and the m_end part outside the if statement, to make the looping logic easier to understand? Is there a reason the tab character isn't included here? As you can see in RenderStyle::isCollapsibleWhiteSpace, it's considered a form of space. Do you need to handle newlines that actually render as hard line breaks differently from newlines that are treated as general whitespace? I guess your test 4 is supposed to be implementing that. Patch looks good and it's *almost* a review+, but I'd like you to resolve the issues I mention above and post a new patch if you don't mind. 105314 3 26627 eroman 2009-01-12 02:01:33 -0800 Created attachment 26627 Rewrite appendTrailingWhitespace() using CharacterIterator. Thanks for the review comments! > WebKit coding style requires that you do Node* n rather than Node *n. Fixed. Sorry about that. I lifted this code from visible_units.cpp (nextBoundary), which must be using an older style. > There's no need for .get() here. You can use the ! operator with a RefPtr > without calling it. Done. > There's no need to check atEnd() here. Once you're at the end, length is > guaranteed to return 0. In WebKit style we'd normally code this without the "> > 0" also. Done. Changed to: for (; charIt.length(); charIt.advance(1)) { > Maybe the should be written the other way around, with the break first, and the > m_end part outside the if statement, to make the looping logic easier to > understand? Done. Moved the break case to be first, so no "else" is needed. Much cleaner, thanks for the suggestion. As for moving the m_end outside of the loop, I have not done that since it hurts readability some, for the case where there is no whitespace (and m_end is not to be changed). > Is there a reason the tab character isn't included here? As you can see in > RenderStyle::isCollapsibleWhiteSpace, it's considered a form of space. The tab character is in fact included -- it is matched by "isSpaceOrNewline(c)". Added "test6" to "doubleclick-whitespace.html", to ensure that tabs (0x9) are included in the selection. 105335 4 26627 darin 2009-01-12 09:03:34 -0800 Comment on attachment 26627 Rewrite appendTrailingWhitespace() using CharacterIterator. r=me 105338 5 26635 eroman 2009-01-12 10:44:30 -0800 Created attachment 26635 Rewrite appendTrailingWhitespace() using CharacterIterator. Updated the patch to fix some indentation in doubleclick-whitespace.html. There were two javascript functions where I had 2 space indentation instead of 4 space indentation. This is the only change over the previous (reviewed) patch. 105376 6 dglazkov 2009-01-12 13:08:54 -0800 http://trac.webkit.org/changeset/39831 26594 2009-01-10 17:36:16 -0800 2009-01-12 02:01:33 -0800 Rewrite appendTrailingWhitespace() using CharacterIterator. trailing-whitespace-v1.txt text/plain 9464 eroman SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiAzOTc4MCkKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsMTcgQEAKKzIwMDktMDEtMTAgIEVyaWMgUm9tYW4gIDxlcm9tYW5AY2hyb21pdW0u b3JnPgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIEZp eCBzb21lIGJ1Z3Mgd2l0aCBTZWxlY3Rpb246OmFwcGVuZFRyYWlsaW5nV2hpdGVzcGFjZSgpLgor CisgICAgICAgIDxodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MjMyMzI+ CisKKyAgICAgICAgVGVzdDogZWRpdGluZy9zZWxlY3Rpb24vZG91YmxlY2xpY2std2hpdGVzcGFj 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