Bug 107561 – Make BackgroundHTMLParser track line/column numbers

• Component: New Bugs
• Status: RESOLVED FIXED

[Tony Gentilcore]

Make BackgroundHTMLParser track line/column numbers

[Tony Gentilcore]

Created attachment 184010 [details]
Patch

[Eric Seidel (no email)]

Comment on attachment 184010 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=184010&action=review

> Source/WebCore/html/parser/BackgroundHTMLParser.cpp:128
> +        m_pendingTokens.append(CompactHTMLToken(m_token, TextPosition(m_input.current().currentLine(), m_input.current().currentColumn())));

That's unfortunate.  I guess tokens are less compact now. :)

[Eric Seidel (no email)]

I guess we need lines for each token to handle event handler lines properly?

[Eric Seidel (no email)]

This is going to conflict with bug 107317.

I think we're also probably going to change compact token to just carry the deltas from the previous token.  Those will take up less than 32-bits each, and allow compact token to be smaller again.

[Eric Seidel (no email)]

Then we would send the real line number separately in the "Delivery" object, and only the deltas in each token.  That means that if for some reason we ever got off, we'd only be off for at max tokenLimit tokens.

[WebKit Review Bot]

Comment on attachment 184010 [details]
Patch

Rejecting attachment 184010 [details] from commit-queue.

Failed to run "['/mnt/git/webkit-commit-queue/Tools/Scripts/webkit-patch', '--status-host=queues.webkit.org', '-..." exit_code: 2 cwd: /mnt/git/webkit-commit-queue

Last 500 characters of output:
rce/WebKit/chromium/webkit/media/crypto/ppapi/cdm --revision 173055 --non-interactive --force --accept theirs-conflict --ignore-externals' in '/mnt/git/webkit-commit-queue/Source/WebKit/chromium'
56>At revision 173055.

________ running '/usr/bin/python tools/clang/scripts/update.py --mac-only' in '/mnt/git/webkit-commit-queue/Source/WebKit/chromium'

________ running '/usr/bin/python gyp_webkit' in '/mnt/git/webkit-commit-queue/Source/WebKit/chromium'
Updating webkit projects from gyp files...

Full output: http://queues.webkit.org/results/16043681

[Eric Seidel (no email)]

The question of where to draw the line between line number accuracy and parser speed is a separate one we can solve after this.

If we only stored per-token-deltas, then we could yield after any token where the delta would be too large. (trading speed for accuracy) or simply ignore the error, or use a solution like you did (which trades some potential speed for accuracy on all documents).

I'll follow-up with a separate bug after we get perf data.

[Tony Gentilcore]

Created attachment 184033 [details]
Patch for landing

[WebKit Review Bot]

Comment on attachment 184033 [details]
Patch for landing

Rejecting attachment 184033 [details] from commit-queue.

Failed to run "['/mnt/git/webkit-commit-queue/Tools/Scripts/webkit-patch', '--status-host=queues.webkit.org', '-..." exit_code: 2 cwd: /mnt/git/webkit-commit-queue

Last 500 characters of output:
z 2 (offset 8 lines).
patching file Source/WebCore/html/parser/CompactHTMLToken.h
Hunk #3 succeeded at 65 with fuzz 2.
Hunk #4 FAILED at 75.
1 out of 4 hunks FAILED -- saving rejects to file Source/WebCore/html/parser/CompactHTMLToken.h.rej
patching file Source/WebCore/html/parser/HTMLDocumentParser.cpp
patching file Source/WebCore/html/parser/HTMLDocumentParser.h

Failed to run "[u'/mnt/git/webkit-commit-queue/Tools/Scripts/svn-apply', '--force']" exit_code: 1 cwd: /mnt/git/webkit-commit-queue

Full output: http://queues.webkit.org/results/16044730

[Eric Seidel (no email)]

It appears my patch won the commit-queue race. :(

We'll need to add this to "SameSizeAsCompactToken", which I can do if you'd like:
http://trac.webkit.org/changeset/140453/trunk/Source/WebCore/html/parser/CompactHTMLToken.cpp

[Tony Gentilcore]

Created attachment 184041 [details]
Patch for landing

[WebKit Review Bot]

Comment on attachment 184041 [details]
Patch for landing

Clearing flags on attachment: 184041

Committed r140467: <http://trac.webkit.org/changeset/140467>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.