proposal: x/tools/present: add support for tasklists

[afh]

Proposal

Creating tasklists (a list with a checked or unchecked checkbox) can be helpful, especially in blog post articles or talk slides.

I hereby propose to add the following additional markup to [present.font])https://github.com/golang/tools/blob/master/present/style.go#L40):

• - [_] to denote a pending task, which will render the marked text within the <del>-tag
• - [x] to denote a completed task, which will render the marked text within the <ins>-tag

See Gerrit Change #42819 for details.

What version of Go are you using (go version)?

go version go1.8.1 darwin/amd64

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Volumes/Users/afh/Library/Go"
GORACE=""
GOROOT="/opt/homebrew/Cellar/go/1.8.1/libexec"
GOTOOLDIR="/opt/homebrew/Cellar/go/1.8.1/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/h7/hy79lh5922l19t0v8vjrxn_c0000gp/T/go-build335905375=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
PKG_CONFIG="pkg-config"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"

[ianlancetaylor]

CC @adg

[adg]

It seems like a reasonable addition to me. What do you think @robpike?

[robpike]

Although reasonable in isolation, I am very nervous of creeping featurism in this tool, which should be bare-bones. It's getting messy. If you need fancy formatting, there are plenty of other tools to do that for you. Present is for simple presentations.

[afh]

Thanks @robpike for considering it. Actually I'd like to use tasklists in a blog based on x/tools/blog and since that uses x/tools/present I had the idea of adding the support for tasklists there.

Maybe I got a little too excited about the two packages and got carried away not considering the implications it may have.
Then again if present is for simple presentations how come blog depends on it? 😉

[robpike]

The blog, by design and construction and choice, avoids fanciness too.

[afh]

I respect your opinion on the matter and consider this rejected then.