syntax highlighter incorrect in nested latex environment

[Michael]

Hi,

This bug probably classifies as a polish bug, but I've stumbled upon some LaTeX code that causes incorrect syntax highlighting.

1) $ lsb_release -rd
Description: Ubuntu 12.04.2 LTS
Release: 12.04

2) $ apt-cache policy kile
kile:
  Installed: 1:2.1.0-1ubuntu2.1
  Candidate: 1:2.1.0-1ubuntu2.1
  Version table:
 *** 1:2.1.0-1ubuntu2.1 0
        500 http://mirror.csclub.uwaterloo.ca/ubuntu/ precise-updates/universe amd64 Packages
        100 /var/lib/dpkg/status
     1:2.1.0-1ubuntu2 0
        500 http://mirror.csclub.uwaterloo.ca/ubuntu/ precise/universe amd64 Packages

The following code, when pasted into the Kile editor, highlights the second "cases" wrong:

\begin{align}
 U_{bg}(z) = \begin{cases}
              U_{max} e^{-(b(z-z_0))^4} &\mbox {if } z \leq z_0,\\
              U_{max} &\mbox {if } z > z_0,\\
             \end{cases}
\end{align}

3) Expectation is that the colour of the second 'cases' matches the first (blue)
4) Actual result is that it got highlighted in green rather than blue

Misc:
- The LaTeX code is correct, it compiles without warnings or errors.
- See the attached screenshot for a visualisation

[Michael (mdunphy-g)]

Hmmm. The fix was pretty simple, add "cases" to the MathEnv list in /usr/share/kde4/apps/katepart/syntax/latex.xml

See attached patch!

Cheers,
Michael

[Michael (mdunphy-g)]

The following code, when pasted into the Kile editor (via Katepart), highlights the second "cases" wrong:

\begin{align}
 U_{bg}(z) = \begin{cases}
              U_{max} e^{-(b(z-z_0))^4} &\mbox {if } z \leq z_0,\\
              U_{max} &\mbox {if } z > z_0,\\
             \end{cases}
\end{align}

Reproducible: Always

Steps to Reproduce:
1. Paste above code into Kate,
2. select Tools->Highlighting->Markup->Latex
3.
Actual Results:
The second "cases" is green

Expected Results:
The second "cases" should be blue

[Michael (mdunphy-g)]

Created attachment 81484
A patch to fix the broken syntax highlighting

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "A patch that fixes the highlighter" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Dhaumann (dhaumann)]

Git commit 4afa72930126f7241aa7eb54307f80db1509d4e7 by Dominik Haumann.
Committed on 01/08/2013 at 08:17.
Pushed by dhaumann into branch 'master'.

fix cases environment highlighting

Thanks to Michael for the patch!
FIXED-IN: 4.11.1

M +10 -1 examples/syntax/highlight.tex
M +3 -3 part/syntax/data/latex.xml

http://commits.kde.org/kate/4afa72930126f7241aa7eb54307f80db1509d4e7

[Dhaumann (dhaumann)]

Git commit 76ef0c074b7dd85dfe5e7bb45e9f0ba3cf999efc by Dominik Haumann.
Committed on 01/08/2013 at 08:17.
Pushed by dhaumann into branch 'KDE/4.11'.

fix cases environment highlighting

Thanks to Michael for the patch!
FIXED-IN: 4.11.1

M +10 -1 examples/syntax/highlight.tex
M +3 -3 part/syntax/data/latex.xml

http://commits.kde.org/kate/76ef0c074b7dd85dfe5e7bb45e9f0ba3cf999efc