Multiline match with QRegExp

[bender86]

Hi.
I'm having some trouble using QRegExp to match a multiline expression. Actually I'm trying to write a Markdown syntax highlighter, and I'd like to recognize something like:

Heading 1
===========
 
Heading 2
-----------

Heading 1
===========

Heading 2
-----------

To copy to clipboard, switch view to plain text mode 

I tried ".+\\n=+" and similar, with no success.


EDIT:
I made some attempts with the RegExp example, and I found out I should be able to use "[^\\n][\\w\\s][^\\n]+\\n=+".
The problem is that QSyntaxHighlighter::highlightBlock() is called once per line, so I can't match anything which spans more than one line. Documentation suggests using a state based highlighter, but I don't think it would work since I know if a line is an heading only when I read the next line.

Any idea how to do that (except using alternative syntax for headings off course)?

[nightghost]

Maybe you could count the block number and look at the next line via QSyntaxHighlighter::document()

[bender86]

Maybe I will try it, for now I just switched to the alternative straightforward syntax:

# Heading 1 #

# Heading 1 #

To copy to clipboard, switch view to plain text mode 

[pbek]

I've the same problem. I will attempt fetching the previous block with `currentBlock().previous()` or maybe the next block with `currentBlock().next()` to do checks...

---

Added after 13 minutes:

Has anyone here actually succeeded to write a markdown highlighter in C++ with QSyntaxHighlighter?
I've only found https://github.com/rupeshk/MarkdownHighlighter that is written in Python.

[anda_skoa]

The Kate editor is a Qt based application that has markdown highlighting (among many others), but I think they are using their own engine.

The same highlight input files are also used by QtCreator, so it likely also has an implementation of that engine.

Cheers,
_

[pbek]

@anda_skoa, kate can't handle this kind of markdown headlines. Meanwhile I wrote my own highlighter https://github.com/pbek/qmarkdowntex...ighlighter.cpp. It will be used in version 16.11.15 of http://www.qownnotes.org/.